aboutsummaryrefslogblamecommitdiffstats
path: root/erts/emulator/pcre/pcre_exec.c
blob: 3fe13ca32edd1dcbf607547a998578043e4879d5 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193








































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































                                                                                                 







































































































































































































                                                                                         
/*************************************************
*      Perl-Compatible Regular Expressions       *
*************************************************/

/* PCRE is a library of functions to support regular expressions whose syntax
and semantics are as close as possible to those of the Perl 5 language.

                       Written by Philip Hazel
           Copyright (c) 1997-2008 University of Cambridge

-----------------------------------------------------------------------------
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

    * Neither the name of the University of Cambridge nor the names of its
      contributors may be used to endorse or promote products derived from
      this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
-----------------------------------------------------------------------------
*/
//#define ERLANG_DEBUG 1

/* This module contains erts_pcre_exec(), the externally visible function that does
pattern matching using an NFA algorithm, trying to mimic Perl as closely as
possible. There are also some static supporting functions. */

/* %ExternalCopyright% */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#define NLBLOCK md             /* Block containing newline information */
#define PSSTART start_subject  /* Field containing processed string start */
#define PSEND   end_subject    /* Field containing processed string end */

#include "pcre_internal.h"

/* Undefine some potentially clashing cpp symbols */

#undef min
#undef max

/* Flag bits for the match() function */

#define match_condassert     0x01  /* Called to check a condition assertion */
#define match_cbegroup       0x02  /* Could-be-empty unlimited repeat group */

/* Non-error returns from the match() function. Error returns are externally
defined PCRE_ERROR_xxx codes, which are all negative. */

#define MATCH_MATCH        1
#define MATCH_NOMATCH      0

/* Special internal returns from the match() function. Make them sufficiently
negative to avoid the external error codes. */

#define MATCH_COMMIT       (-999)
#define MATCH_PRUNE        (-998)
#define MATCH_SKIP         (-997)
#define MATCH_THEN         (-996)

/* Maximum number of ints of offset to save on the stack for recursive calls.
If the offset vector is bigger, malloc is used. This should be a multiple of 3,
because the offset vector is always a multiple of 3 long. */

#define REC_STACK_SAVE_MAX 30

/* Min and max values for the common repeats; for the maxima, 0 => infinity */

static const char rep_min[] = { 0, 0, 1, 1, 0, 0 };
static const char rep_max[] = { 0, 0, 0, 0, 1, 1 };



#ifdef DEBUG
/*************************************************
*        Debugging function to print chars       *
*************************************************/

/* Print a sequence of chars in printable format, stopping at the end of the
subject if the requested.

Arguments:
  p           points to characters
  length      number to print
  is_subject  TRUE if printing from within md->start_subject
  md          pointer to matching data block, if is_subject is TRUE

Returns:     nothing
*/

static void
pchars(const uschar *p, int length, BOOL is_subject, match_data *md)
{
unsigned int c;
if (is_subject && length > md->end_subject - p) length = md->end_subject - p;
while (length-- > 0)
  if (isprint(c = *(p++))) printf("%c", c); else printf("\\x%02x", c);
}
#endif

#ifdef ERLANG_INTEGRATION
#ifdef ERLANG_DEBUG
#include <stdarg.h>
static void
edebug_printf(const char *format, ...)
{
  va_list args;

  va_start(args, format);
  fprintf(stderr, "PCRE: ");
  vfprintf(stderr, format, args);
  va_end(args);
  fprintf(stderr, "\r\n");
}
#endif
#endif

/*************************************************
*          Match a back-reference                *
*************************************************/

/* If a back reference hasn't been set, the length that is passed is greater
than the number of characters left in the string, so the match fails.

Arguments:
  offset      index into the offset vector
  eptr        points into the subject
  length      length to be matched
  md          points to match data block
  ims         the ims flags

Returns:      TRUE if matched
*/

static BOOL
match_ref(int offset, register USPTR eptr, int length, match_data *md,
  unsigned long int ims)
{
USPTR p = md->start_subject + md->offset_vector[offset];

#ifdef DEBUG
if (eptr >= md->end_subject)
  printf("matching subject <null>");
else
  {
  printf("matching subject ");
  pchars(eptr, length, TRUE, md);
  }
printf(" against backref ");
pchars(p, length, FALSE, md);
printf("\n");
#endif

/* Always fail if not enough characters left */

if (length > md->end_subject - eptr) return FALSE;

/* Separate the caselesss case for speed */

if ((ims & PCRE_CASELESS) != 0)
  {
  while (length-- > 0)
    if (md->lcc[*p++] != md->lcc[*eptr++]) return FALSE;
  }
else
  { while (length-- > 0) if (*p++ != *eptr++) return FALSE; }

return TRUE;
}



/***************************************************************************
****************************************************************************
                   RECURSION IN THE match() FUNCTION

The match() function is highly recursive, though not every recursive call
increases the recursive depth. Nevertheless, some regular expressions can cause
it to recurse to a great depth. I was writing for Unix, so I just let it call
itself recursively. This uses the stack for saving everything that has to be
saved for a recursive call. On Unix, the stack can be large, and this works
fine.

It turns out that on some non-Unix-like systems there are problems with
programs that use a lot of stack. (This despite the fact that every last chip
has oodles of memory these days, and techniques for extending the stack have
been known for decades.) So....

There is a fudge, triggered by defining NO_RECURSE, which avoids recursive
calls by keeping local variables that need to be preserved in blocks of memory
obtained from malloc() instead instead of on the stack. Macros are used to
achieve this so that the actual code doesn't look very different to what it
always used to.

The original heap-recursive code used longjmp(). However, it seems that this
can be very slow on some operating systems. Following a suggestion from Stan
Switzer, the use of longjmp() has been abolished, at the cost of having to
provide a unique number for each call to RMATCH. There is no way of generating
a sequence of numbers at compile time in C. I have given them names, to make
them stand out more clearly.

Crude tests on x86 Linux show a small speedup of around 5-8%. However, on
FreeBSD, avoiding longjmp() more than halves the time taken to run the standard
tests. Furthermore, not using longjmp() means that local dynamic variables
don't have indeterminate values; this has meant that the frame size can be
reduced because the result can be "passed back" by straight setting of the
variable instead of being passed in the frame.
****************************************************************************
***************************************************************************/

/* Numbers for RMATCH calls. When this list is changed, the code at HEAP_RETURN
below must be updated in sync.  */

enum { RM1=1, RM2,  RM3,  RM4,  RM5,  RM6,  RM7,  RM8,  RM9,  RM10,
       RM11,  RM12, RM13, RM14, RM15, RM16, RM17, RM18, RM19, RM20,
       RM21,  RM22, RM23, RM24, RM25, RM26, RM27, RM28, RM29, RM30,
       RM31,  RM32, RM33, RM34, RM35, RM36, RM37, RM38, RM39, RM40,
       RM41,  RM42, RM43, RM44, RM45, RM46, RM47, RM48, RM49, RM50,
       RM51,  RM52, RM53, RM54 
};
/* These versions of the macros use the stack, as normal. There are debugging
versions and production versions. Note that the "rw" argument of RMATCH isn't
actuall used in this definition. */

#ifndef NO_RECURSE
#ifdef ERLANG_INTEGRATION
#error ERLANG_INTEGRATION only together with NO_RECURSE
#endif
#define REGISTER register

#ifdef DEBUG
#define RMATCH(ra,rb,rc,rd,re,rf,rg,rw) \
  { \
  printf("match() called in line %d\n", __LINE__); \
  rrc = match(ra,rb,mstart,rc,rd,re,rf,rg,rdepth+1); \
  printf("to line %d\n", __LINE__); \
  }
#define RRETURN(ra) \
  { \
  printf("match() returned %d from line %d ", ra, __LINE__); \
  return ra; \
  }
#else
#define RMATCH(ra,rb,rc,rd,re,rf,rg,rw) \
  rrc = match(ra,rb,mstart,rc,rd,re,rf,rg,rdepth+1)
#define RRETURN(ra) return ra
#endif

#else


/* These versions of the macros manage a private stack on the heap. Note that
the "rd" argument of RMATCH isn't actually used in this definition. It's the md
argument of match(), which never changes. */

#define REGISTER

#define RMATCH(ra,rb,rc,rd,re,rf,rg,rw)\
  {\
  heapframe *newframe = (erts_pcre_stack_malloc)(sizeof(heapframe));\
  frame->Xwhere = rw; \
  newframe->Xeptr = ra;\
  newframe->Xecode = rb;\
  newframe->Xmstart = mstart;\
  newframe->Xoffset_top = rc;\
  newframe->Xims = re;\
  newframe->Xeptrb = rf;\
  newframe->Xflags = rg;\
  newframe->Xrdepth = frame->Xrdepth + 1;\
  newframe->Xprevframe = frame;\
  frame = newframe;\
  DPRINTF(("restarting from line %d\n", __LINE__));\
  goto HEAP_RECURSE;\
  L_##rw:\
  DPRINTF(("jumped back to line %d\n", __LINE__));\
  }

#ifdef ERLANG_INTEGRATION
#define RRETURN(ra)\
  {\
  heapframe *newframe = frame;\
  frame = newframe->Xprevframe;\
  (erts_pcre_stack_free)(newframe);\
  if (frame != NULL)\
    {\
    rrc = ra;\
    goto HEAP_RETURN;\
    }\
  if (LOOP_LIMIT != 0) \
    { \
    md->loop_limit -= LOOP_COUNT; \
    } \
  return ra;\
  }
#else
#define RRETURN(ra)\
  {\
  heapframe *newframe = frame;\
  frame = newframe->Xprevframe;\
  (erts_pcre_stack_free)(newframe);\
  if (frame != NULL)\
    {\
    rrc = ra;\
    goto HEAP_RETURN;\
    }\
  return ra;\
  }
#endif


/* Structure for remembering the local variables in a private frame */

typedef struct heapframe {
  struct heapframe *Xprevframe;

  /* Function arguments that may change */

  const uschar *Xeptr;
  const uschar *Xecode;
  const uschar *Xmstart;
  int Xoffset_top;
  long int Xims;
  eptrblock *Xeptrb;
  int Xflags;
  unsigned int Xrdepth;

  /* Function local variables */

  const uschar *Xcallpat;
  const uschar *Xcharptr;
  const uschar *Xdata;
  const uschar *Xnext;
  const uschar *Xpp;
  const uschar *Xprev;
  const uschar *Xsaved_eptr;

  recursion_info Xnew_recursive;

  BOOL Xcur_is_word;
  BOOL Xcondition;
  BOOL Xprev_is_word;

  unsigned long int Xoriginal_ims;

#ifdef SUPPORT_UCP
  int Xprop_type;
  int Xprop_value;
  int Xprop_fail_result;
  int Xprop_category;
  int Xprop_chartype;
  int Xprop_script;
  int Xoclength;
  uschar Xocchars[8];
#endif

  int Xctype;
  unsigned int Xfc;
  int Xfi;
  int Xlength;
  int Xmax;
  int Xmin;
  int Xnumber;
  int Xoffset;
  int Xop;
  int Xsave_capture_last;
  int Xsave_offset1, Xsave_offset2, Xsave_offset3;
  int Xstacksave[REC_STACK_SAVE_MAX];

  eptrblock Xnewptrb;

  /* Where to jump back to */

  int Xwhere;

} heapframe;

#endif


/***************************************************************************
***************************************************************************/



/*************************************************
*         Match from current position            *
*************************************************/

/* This function is called recursively in many circumstances. Whenever it
returns a negative (error) response, the outer incarnation must also return the
same response.

Performance note: It might be tempting to extract commonly used fields from the
md structure (e.g. utf8, end_subject) into individual variables to improve
performance. Tests using gcc on a SPARC disproved this; in the first case, it
made performance worse.

Arguments:
   eptr        pointer to current character in subject
   ecode       pointer to current position in compiled code
   mstart      pointer to the current match start position (can be modified
                 by encountering \K)
   offset_top  current top pointer
   md          pointer to "static" info for the match
   ims         current /i, /m, and /s options
   eptrb       pointer to chain of blocks containing eptr at start of
                 brackets - for testing for empty matches
   flags       can contain
                 match_condassert - this is an assertion condition
                 match_cbegroup - this is the start of an unlimited repeat
                   group that can match an empty string
   rdepth      the recursion depth

Returns:       MATCH_MATCH if matched            )  these values are >= 0
               MATCH_NOMATCH if failed to match  )
               a negative PCRE_ERROR_xxx value if aborted by an error condition
                 (e.g. stopped by repeated call or recursion limit)
*/

static int
match(REGISTER USPTR eptr, REGISTER const uschar *ecode, const uschar *mstart,
  int offset_top, match_data *md, unsigned long int ims, eptrblock *eptrb,
  int flags, unsigned int rdepth)
{
/* These variables do not need to be preserved over recursion in this function,
so they can be ordinary variables in all cases. Mark some of them with
"register" because they are used a lot in loops. */

register int  rrc;         /* Returns from recursive calls */
register int  i;           /* Used for loops not involving calls to RMATCH() */
register unsigned int c;   /* Character values not kept over RMATCH() calls */
register BOOL utf8;        /* Local copy of UTF-8 flag for speed */

BOOL minimize, possessive; /* Quantifier options */

/* When recursion is not being used, all "local" variables that have to be
preserved over calls to RMATCH() are part of a "frame" which is obtained from
heap storage. Set up the top-level frame here; others are obtained from the
heap whenever RMATCH() does a "recursion". See the macro definitions above. */

#ifdef NO_RECURSE
#ifdef ERLANG_INTEGRATION
#define LOOP_COUNT loop_count
#define LOOP_LIMIT loop_limit
#ifdef ERLANG_DEBUG
#define EDEBUGF(X) edebug_printf X
#else
#define EDEBUGF(X)
#endif
#define COST(N) (LOOP_COUNT += (N))
#define LABEL_XCAT(A,B) A##B
#define LABEL_CAT(A,B) LABEL_XCAT(A,B)

#define COST_CHK(N) 				\
do {						\
  LOOP_COUNT += (N);				\
  if (LOOP_LIMIT != 0) {			\
    if (LOOP_COUNT > LOOP_LIMIT) {              \
      frame->Xwhere = __LINE__ + 100;	        \
      goto LOOP_COUNT_BREAK;			\
      LABEL_CAT(L_LOOP_COUNT_,__LINE__):	\
      ;                                         \
    }						\
  }						\
} while (0)

register int loop_count = 0;
register int loop_limit = md->loop_limit;
heapframe *frame; 
if (md->state_save) {
  frame = md->state_save;
  /* ASSERT(frame != NULL); */
  EDEBUGF(("Break restore!"));
  goto LOOP_COUNT_RETURN;
}
frame = (erts_pcre_stack_malloc)(sizeof(heapframe));
#else
#define COST(N)
#define COST_CHK(N)
heapframe *frame = (erts_pcre_stack_malloc)(sizeof(heapframe));
#endif

frame->Xprevframe = NULL;            /* Marks the top level */

/* Copy in the original argument variables */

frame->Xeptr = eptr;
frame->Xecode = ecode;
frame->Xmstart = mstart;
frame->Xoffset_top = offset_top;
frame->Xims = ims;
frame->Xeptrb = eptrb;
frame->Xflags = flags;
frame->Xrdepth = rdepth;

/* This is where control jumps back to to effect "recursion" */

HEAP_RECURSE:

/* Macros make the argument variables come from the current frame */

#define eptr               frame->Xeptr
#define ecode              frame->Xecode
#define mstart             frame->Xmstart
#define offset_top         frame->Xoffset_top
#define ims                frame->Xims
#define eptrb              frame->Xeptrb
#define flags              frame->Xflags
#define rdepth             frame->Xrdepth

/* Ditto for the local variables */

#ifdef SUPPORT_UTF8
#define charptr            frame->Xcharptr
#endif
#define callpat            frame->Xcallpat
#define data               frame->Xdata
#define next               frame->Xnext
#define pp                 frame->Xpp
#define prev               frame->Xprev
#define saved_eptr         frame->Xsaved_eptr

#define new_recursive      frame->Xnew_recursive

#define cur_is_word        frame->Xcur_is_word
#define condition          frame->Xcondition
#define prev_is_word       frame->Xprev_is_word

#define original_ims       frame->Xoriginal_ims

#ifdef SUPPORT_UCP
#define prop_type          frame->Xprop_type
#define prop_value         frame->Xprop_value
#define prop_fail_result   frame->Xprop_fail_result
#define prop_category      frame->Xprop_category
#define prop_chartype      frame->Xprop_chartype
#define prop_script        frame->Xprop_script
#define oclength           frame->Xoclength
#define occhars            frame->Xocchars
#endif

#define ctype              frame->Xctype
#define fc                 frame->Xfc
#define fi                 frame->Xfi
#define length             frame->Xlength
#define max                frame->Xmax
#define min                frame->Xmin
#define number             frame->Xnumber
#define offset             frame->Xoffset
#define op                 frame->Xop
#define save_capture_last  frame->Xsave_capture_last
#define save_offset1       frame->Xsave_offset1
#define save_offset2       frame->Xsave_offset2
#define save_offset3       frame->Xsave_offset3
#define stacksave          frame->Xstacksave

#define newptrb            frame->Xnewptrb

/* When recursion is being used, local variables are allocated on the stack and
get preserved during recursion in the normal way. In this environment, fi and
i, and fc and c, can be the same variables. */

#else         /* NO_RECURSE not defined */
#define COST(N)
#define COST_CHK(N)
#define fi i
#define fc c


#ifdef SUPPORT_UTF8                /* Many of these variables are used only  */
const uschar *charptr;             /* in small blocks of the code. My normal */
#endif                             /* style of coding would have declared    */
const uschar *callpat;             /* them within each of those blocks.      */
const uschar *data;                /* However, in order to accommodate the   */
const uschar *next;                /* version of this code that uses an      */
USPTR         pp;                  /* external "stack" implemented on the    */
const uschar *prev;                /* heap, it is easier to declare them all */
USPTR         saved_eptr;          /* here, so the declarations can be cut   */
                                   /* out in a block. The only declarations  */
recursion_info new_recursive;      /* within blocks below are for variables  */
                                   /* that do not have to be preserved over  */
BOOL cur_is_word;                  /* a recursive call to RMATCH().          */
BOOL condition;
BOOL prev_is_word;

unsigned long int original_ims;

#ifdef SUPPORT_UCP
int prop_type;
int prop_value;
int prop_fail_result;
int prop_category;
int prop_chartype;
int prop_script;
int oclength;
uschar occhars[8];
#endif

int ctype;
int length;
int max;
int min;
int number;
int offset;
int op;
int save_capture_last;
int save_offset1, save_offset2, save_offset3;
int stacksave[REC_STACK_SAVE_MAX];

eptrblock newptrb;
#endif     /* NO_RECURSE */

/* These statements are here to stop the compiler complaining about unitialized
variables. */

#ifdef SUPPORT_UCP
prop_value = 0;
prop_fail_result = 0;
#endif


/* This label is used for tail recursion, which is used in a few cases even
when NO_RECURSE is not defined, in order to reduce the amount of stack that is
used. Thanks to Ian Taylor for noticing this possibility and sending the
original patch. */

TAIL_RECURSE:

/* OK, now we can get on with the real code of the function. Recursive calls
are specified by the macro RMATCH and RRETURN is used to return. When
NO_RECURSE is *not* defined, these just turn into a recursive call to match()
and a "return", respectively (possibly with some debugging if DEBUG is
defined). However, RMATCH isn't like a function call because it's quite a
complicated macro. It has to be used in one particular way. This shouldn't,
however, impact performance when true recursion is being used. */

#ifdef SUPPORT_UTF8
utf8 = md->utf8;       /* Local copy of the flag */
#else
utf8 = FALSE;
#endif

/* First check that we haven't called match() too many times, or that we
haven't exceeded the recursive call limit. */

if (md->match_call_count++ >= md->match_limit) RRETURN(PCRE_ERROR_MATCHLIMIT);
if (rdepth >= md->match_limit_recursion) RRETURN(PCRE_ERROR_RECURSIONLIMIT);

original_ims = ims;    /* Save for resetting on ')' */

/* At the start of a group with an unlimited repeat that may match an empty
string, the match_cbegroup flag is set. When this is the case, add the current
subject pointer to the chain of such remembered pointers, to be checked when we
hit the closing ket, in order to break infinite loops that match no characters.
When match() is called in other circumstances, don't add to the chain. The
match_cbegroup flag must NOT be used with tail recursion, because the memory
block that is used is on the stack, so a new one may be required for each
match(). */

if ((flags & match_cbegroup) != 0)
  {
  newptrb.epb_saved_eptr = eptr;
  newptrb.epb_prev = eptrb;
  eptrb = &newptrb;
  }

/* Now start processing the opcodes. */

for (;;)
  {
  COST_CHK(1);
  minimize = possessive = FALSE;
  op = *ecode;
  EDEBUGF(("Op = %d",op));

  /* For partial matching, remember if we ever hit the end of the subject after
  matching at least one subject character. */

  if (md->partial &&
      eptr >= md->end_subject &&
      eptr > mstart)
    md->hitend = TRUE;

  switch(op)
    {
    case OP_FAIL:
    RRETURN(MATCH_NOMATCH);

    case OP_PRUNE:
    RMATCH(eptr, ecode + _erts_pcre_OP_lengths[*ecode], offset_top, md,
      ims, eptrb, flags, RM51);
    if (rrc != MATCH_NOMATCH) RRETURN(rrc);
    RRETURN(MATCH_PRUNE);

    case OP_COMMIT:
    RMATCH(eptr, ecode + _erts_pcre_OP_lengths[*ecode], offset_top, md,
      ims, eptrb, flags, RM52);
    if (rrc != MATCH_NOMATCH) RRETURN(rrc);
    RRETURN(MATCH_COMMIT);

    case OP_SKIP:
    RMATCH(eptr, ecode + _erts_pcre_OP_lengths[*ecode], offset_top, md,
      ims, eptrb, flags, RM53);
    if (rrc != MATCH_NOMATCH) RRETURN(rrc);
    md->start_match_ptr = eptr;   /* Pass back current position */
    RRETURN(MATCH_SKIP);

    case OP_THEN:
    RMATCH(eptr, ecode + _erts_pcre_OP_lengths[*ecode], offset_top, md,
      ims, eptrb, flags, RM54);
    if (rrc != MATCH_NOMATCH) RRETURN(rrc);
    RRETURN(MATCH_THEN);

    /* Handle a capturing bracket. If there is space in the offset vector, save
    the current subject position in the working slot at the top of the vector.
    We mustn't change the current values of the data slot, because they may be
    set from a previous iteration of this group, and be referred to by a
    reference inside the group.

    If the bracket fails to match, we need to restore this value and also the
    values of the final offsets, in case they were set by a previous iteration
    of the same bracket.

    If there isn't enough space in the offset vector, treat this as if it were
    a non-capturing bracket. Don't worry about setting the flag for the error
    case here; that is handled in the code for KET. */

    case OP_CBRA:
    case OP_SCBRA:
    number = GET2(ecode, 1+LINK_SIZE);
    offset = number << 1;

#ifdef DEBUG
    printf("start bracket %d\n", number);
    printf("subject=");
    pchars(eptr, 16, TRUE, md);
    printf("\n");
#endif

    if (offset < md->offset_max)
      {
      save_offset1 = md->offset_vector[offset];
      save_offset2 = md->offset_vector[offset+1];
      save_offset3 = md->offset_vector[md->offset_end - number];
      save_capture_last = md->capture_last;

      DPRINTF(("saving %d %d %d\n", save_offset1, save_offset2, save_offset3));
      md->offset_vector[md->offset_end - number] = eptr - md->start_subject;

      flags = (op == OP_SCBRA)? match_cbegroup : 0;
      do /* PaN: OK */
        {
        RMATCH(eptr, ecode + _erts_pcre_OP_lengths[*ecode], offset_top, md,
          ims, eptrb, flags, RM1);
        if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
        md->capture_last = save_capture_last;
        ecode += GET(ecode, 1);
        }
      while (*ecode == OP_ALT);

      DPRINTF(("bracket %d failed\n", number));

      md->offset_vector[offset] = save_offset1;
      md->offset_vector[offset+1] = save_offset2;
      md->offset_vector[md->offset_end - number] = save_offset3;

      RRETURN(MATCH_NOMATCH);
      }

    /* FALL THROUGH ... Insufficient room for saving captured contents. Treat
    as a non-capturing bracket. */

    /* VVVVVVVVVVVVVVVVVVVVVVVVV */
    /* VVVVVVVVVVVVVVVVVVVVVVVVV */

    DPRINTF(("insufficient capture room: treat as non-capturing\n"));

    /* VVVVVVVVVVVVVVVVVVVVVVVVV */
    /* VVVVVVVVVVVVVVVVVVVVVVVVV */

    /* Non-capturing bracket. Loop for all the alternatives. When we get to the
    final alternative within the brackets, we would return the result of a
    recursive call to match() whatever happened. We can reduce stack usage by
    turning this into a tail recursion, except in the case when match_cbegroup
    is set.*/

    case OP_BRA:
    case OP_SBRA:
    DPRINTF(("start non-capturing bracket\n"));
    flags = (op >= OP_SBRA)? match_cbegroup : 0;
    for (;;) /* PaN: OK */
      {
      if (ecode[GET(ecode, 1)] != OP_ALT)   /* Final alternative */
        {
        if (flags == 0)    /* Not a possibly empty group */
          {
          ecode += _erts_pcre_OP_lengths[*ecode];
          DPRINTF(("bracket 0 tail recursion\n"));
          goto TAIL_RECURSE;
          }

        /* Possibly empty group; can't use tail recursion. */

        RMATCH(eptr, ecode + _erts_pcre_OP_lengths[*ecode], offset_top, md, ims,
          eptrb, flags, RM48);
        RRETURN(rrc);
        }

      /* For non-final alternatives, continue the loop for a NOMATCH result;
      otherwise return. */

      RMATCH(eptr, ecode + _erts_pcre_OP_lengths[*ecode], offset_top, md, ims,
        eptrb, flags, RM2);
      if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
      ecode += GET(ecode, 1);
      }
    /* Control never reaches here. */

    /* Conditional group: compilation checked that there are no more than
    two branches. If the condition is false, skipping the first branch takes us
    past the end if there is only one branch, but that's OK because that is
    exactly what going to the ket would do. As there is only one branch to be
    obeyed, we can use tail recursion to avoid using another stack frame. */

    case OP_COND:
    case OP_SCOND:
    if (ecode[LINK_SIZE+1] == OP_RREF)         /* Recursion test */
      {
      offset = GET2(ecode, LINK_SIZE + 2);     /* Recursion group number*/
      condition = md->recursive != NULL &&
        (offset == RREF_ANY || offset == md->recursive->group_num);
      ecode += condition? 3 : GET(ecode, 1);
      }

    else if (ecode[LINK_SIZE+1] == OP_CREF)    /* Group used test */
      {
      offset = GET2(ecode, LINK_SIZE+2) << 1;  /* Doubled ref number */
      condition = offset < offset_top && md->offset_vector[offset] >= 0;
      ecode += condition? 3 : GET(ecode, 1);
      }

    else if (ecode[LINK_SIZE+1] == OP_DEF)     /* DEFINE - always false */
      {
      condition = FALSE;
      ecode += GET(ecode, 1);
      }

    /* The condition is an assertion. Call match() to evaluate it - setting
    the final argument match_condassert causes it to stop at the end of an
    assertion. */

    else
      {
      RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, NULL,
          match_condassert, RM3);
      if (rrc == MATCH_MATCH)
        {
        condition = TRUE;
        ecode += 1 + LINK_SIZE + GET(ecode, LINK_SIZE + 2);
        while (*ecode == OP_ALT) ecode += GET(ecode, 1); /* PaN: Check */
        }
      else if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN)
        {
        RRETURN(rrc);         /* Need braces because of following else */
        }
      else
        {
        condition = FALSE;
        ecode += GET(ecode, 1);
        }
      }

    /* We are now at the branch that is to be obeyed. As there is only one,
    we can use tail recursion to avoid using another stack frame, except when
    match_cbegroup is required for an unlimited repeat of a possibly empty
    group. If the second alternative doesn't exist, we can just plough on. */

    if (condition || *ecode == OP_ALT)
      {
      ecode += 1 + LINK_SIZE;
      if (op == OP_SCOND)        /* Possibly empty group */
        {
        RMATCH(eptr, ecode, offset_top, md, ims, eptrb, match_cbegroup, RM49);
        RRETURN(rrc);
        }
      else                       /* Group must match something */
        {
        flags = 0;
        goto TAIL_RECURSE;
        }
      }
    else                         /* Condition false & no 2nd alternative */
      {
      ecode += 1 + LINK_SIZE;
      }
    break;


    /* End of the pattern, either real or forced. If we are in a top-level
    recursion, we should restore the offsets appropriately and continue from
    after the call. */

    case OP_ACCEPT:
    case OP_END:
    if (md->recursive != NULL && md->recursive->group_num == 0)
      {
      recursion_info *rec = md->recursive;
      DPRINTF(("End of pattern in a (?0) recursion\n"));
      md->recursive = rec->prevrec;
      memmove(md->offset_vector, rec->offset_save,
        rec->saved_max * sizeof(int));
      mstart = rec->save_start;
      ims = original_ims;
      ecode = rec->after_call;
      break;
      }

    /* Otherwise, if PCRE_NOTEMPTY is set, fail if we have matched an empty
    string - backtracking will then try other alternatives, if any. */

    if (md->notempty && eptr == mstart) RRETURN(MATCH_NOMATCH);
    md->end_match_ptr = eptr;           /* Record where we ended */
    md->end_offset_top = offset_top;    /* and how many extracts were taken */
    md->start_match_ptr = mstart;       /* and the start (\K can modify) */
    RRETURN(MATCH_MATCH);

    /* Change option settings */

    case OP_OPT:
    ims = ecode[1];
    ecode += 2;
    DPRINTF(("ims set to %02lx\n", ims));
    break;

    /* Assertion brackets. Check the alternative branches in turn - the
    matching won't pass the KET for an assertion. If any one branch matches,
    the assertion is true. Lookbehind assertions have an OP_REVERSE item at the
    start of each branch to move the current point backwards, so the code at
    this level is identical to the lookahead case. */

    case OP_ASSERT:
    case OP_ASSERTBACK:
    do /* PaN: OK */
      {
      RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, NULL, 0,
        RM4);
      if (rrc == MATCH_MATCH) break;
      if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
      ecode += GET(ecode, 1);
      }
    while (*ecode == OP_ALT);
    if (*ecode == OP_KET) RRETURN(MATCH_NOMATCH);

    /* If checking an assertion for a condition, return MATCH_MATCH. */

    if ((flags & match_condassert) != 0) RRETURN(MATCH_MATCH);

    /* Continue from after the assertion, updating the offsets high water
    mark, since extracts may have been taken during the assertion. */

    do ecode += GET(ecode,1); while (*ecode == OP_ALT); /* PaN: OK */
    ecode += 1 + LINK_SIZE;
    offset_top = md->end_offset_top;
    continue;

    /* Negative assertion: all branches must fail to match */

    case OP_ASSERT_NOT:
    case OP_ASSERTBACK_NOT:
    do /* PaN: OK */ 
      {
      RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, NULL, 0,
        RM5);
      if (rrc == MATCH_MATCH) RRETURN(MATCH_NOMATCH);
      if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
      ecode += GET(ecode,1);
      }
    while (*ecode == OP_ALT);

    if ((flags & match_condassert) != 0) RRETURN(MATCH_MATCH);

    ecode += 1 + LINK_SIZE;
    continue;

    /* Move the subject pointer back. This occurs only at the start of
    each branch of a lookbehind assertion. If we are too close to the start to
    move back, this match function fails. When working with UTF-8 we move
    back a number of characters, not bytes. */

    case OP_REVERSE:
#ifdef SUPPORT_UTF8
    if (utf8)
      {
      i = GET(ecode, 1);
      COST(i);
      while (i-- > 0) /* PaN: OK */
        {
        eptr--;
        if (eptr < md->start_subject) RRETURN(MATCH_NOMATCH);
        BACKCHAR(eptr);
        }
      }
    else
#endif

    /* No UTF-8 support, or not in UTF-8 mode: count is byte count */

      {
      eptr -= GET(ecode, 1);
      if (eptr < md->start_subject) RRETURN(MATCH_NOMATCH);
      }

    /* Skip to next op code */

    ecode += 1 + LINK_SIZE;
    break;

    /* The callout item calls an external function, if one is provided, passing
    details of the match so far. This is mainly for debugging, though the
    function is able to force a failure. */

    case OP_CALLOUT:
    if (erts_pcre_callout != NULL)
      {
      pcre_callout_block cb;
      cb.version          = 1;   /* Version 1 of the callout block */
      cb.callout_number   = ecode[1];
      cb.offset_vector    = md->offset_vector;
      cb.subject          = (PCRE_SPTR)md->start_subject;
      cb.subject_length   = md->end_subject - md->start_subject;
      cb.start_match      = mstart - md->start_subject;
      cb.current_position = eptr - md->start_subject;
      cb.pattern_position = GET(ecode, 2);
      cb.next_item_length = GET(ecode, 2 + LINK_SIZE);
      cb.capture_top      = offset_top/2;
      cb.capture_last     = md->capture_last;
      cb.callout_data     = md->callout_data;
      if ((rrc = (*erts_pcre_callout)(&cb)) > 0) RRETURN(MATCH_NOMATCH);
      if (rrc < 0) RRETURN(rrc);
      }
    ecode += 2 + 2*LINK_SIZE;
    break;

    /* Recursion either matches the current regex, or some subexpression. The
    offset data is the offset to the starting bracket from the start of the
    whole pattern. (This is so that it works from duplicated subpatterns.)

    If there are any capturing brackets started but not finished, we have to
    save their starting points and reinstate them after the recursion. However,
    we don't know how many such there are (offset_top records the completed
    total) so we just have to save all the potential data. There may be up to
    65535 such values, which is too large to put on the stack, but using malloc
    for small numbers seems expensive. As a compromise, the stack is used when
    there are no more than REC_STACK_SAVE_MAX values to store; otherwise malloc
    is used. A problem is what to do if the malloc fails ... there is no way of
    returning to the top level with an error. Save the top REC_STACK_SAVE_MAX
    values on the stack, and accept that the rest may be wrong.

    There are also other values that have to be saved. We use a chained
    sequence of blocks that actually live on the stack. Thanks to Robin Houston
    for the original version of this logic. */

    case OP_RECURSE:
      {
      callpat = md->start_code + GET(ecode, 1);
      new_recursive.group_num = (callpat == md->start_code)? 0 :
        GET2(callpat, 1 + LINK_SIZE);

      /* Add to "recursing stack" */

      new_recursive.prevrec = md->recursive;
      md->recursive = &new_recursive;

      /* Find where to continue from afterwards */

      ecode += 1 + LINK_SIZE;
      new_recursive.after_call = ecode;

      /* Now save the offset data. */

      new_recursive.saved_max = md->offset_end;
      if (new_recursive.saved_max <= REC_STACK_SAVE_MAX)
        new_recursive.offset_save = stacksave;
      else
        {
        new_recursive.offset_save =
          (int *)(erts_pcre_malloc)(new_recursive.saved_max * sizeof(int));
        if (new_recursive.offset_save == NULL) RRETURN(PCRE_ERROR_NOMEMORY);
        }

      memcpy(new_recursive.offset_save, md->offset_vector,
            new_recursive.saved_max * sizeof(int));
      new_recursive.save_start = mstart;
      mstart = eptr;

      /* OK, now we can do the recursion. For each top-level alternative we
      restore the offset and recursion data. */

      DPRINTF(("Recursing into group %d\n", new_recursive.group_num));
      flags = (*callpat >= OP_SBRA)? match_cbegroup : 0;
      do /* PaN: OK */
        {
        RMATCH(eptr, callpat + _erts_pcre_OP_lengths[*callpat], offset_top,
          md, ims, eptrb, flags, RM6);
        if (rrc == MATCH_MATCH)
          {
          DPRINTF(("Recursion matched\n"));
          md->recursive = new_recursive.prevrec;
          if (new_recursive.offset_save != stacksave)
            (erts_pcre_free)(new_recursive.offset_save);
          RRETURN(MATCH_MATCH);
          }
        else if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN)
          {
          DPRINTF(("Recursion gave error %d\n", rrc));
          RRETURN(rrc);
          }

        md->recursive = &new_recursive;
        memcpy(md->offset_vector, new_recursive.offset_save,
            new_recursive.saved_max * sizeof(int));
        callpat += GET(callpat, 1);
        }
      while (*callpat == OP_ALT);

      DPRINTF(("Recursion didn't match\n"));
      md->recursive = new_recursive.prevrec;
      if (new_recursive.offset_save != stacksave)
        (erts_pcre_free)(new_recursive.offset_save);
      RRETURN(MATCH_NOMATCH);
      }
    /* Control never reaches here */

    /* "Once" brackets are like assertion brackets except that after a match,
    the point in the subject string is not moved back. Thus there can never be
    a move back into the brackets. Friedl calls these "atomic" subpatterns.
    Check the alternative branches in turn - the matching won't pass the KET
    for this kind of subpattern. If any one branch matches, we carry on as at
    the end of a normal bracket, leaving the subject pointer. */

    case OP_ONCE:
    prev = ecode;
    saved_eptr = eptr;

    do /* PaN: OK */
      {
      RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb, 0, RM7);
      if (rrc == MATCH_MATCH) break;
      if (rrc != MATCH_NOMATCH && rrc != MATCH_THEN) RRETURN(rrc);
      ecode += GET(ecode,1);
      }
    while (*ecode == OP_ALT);

    /* If hit the end of the group (which could be repeated), fail */

    if (*ecode != OP_ONCE && *ecode != OP_ALT) RRETURN(MATCH_NOMATCH);

    /* Continue as from after the assertion, updating the offsets high water
    mark, since extracts may have been taken. */

    do ecode += GET(ecode, 1); while (*ecode == OP_ALT); /* PaN: OK */

    offset_top = md->end_offset_top;
    eptr = md->end_match_ptr;

    /* For a non-repeating ket, just continue at this level. This also
    happens for a repeating ket if no characters were matched in the group.
    This is the forcible breaking of infinite loops as implemented in Perl
    5.005. If there is an options reset, it will get obeyed in the normal
    course of events. */

    if (*ecode == OP_KET || eptr == saved_eptr)
      {
      ecode += 1+LINK_SIZE;
      break;
      }

    /* The repeating kets try the rest of the pattern or restart from the
    preceding bracket, in the appropriate order. The second "call" of match()
    uses tail recursion, to avoid using another stack frame. We need to reset
    any options that changed within the bracket before re-running it, so
    check the next opcode. */

    if (ecode[1+LINK_SIZE] == OP_OPT)
      {
      ims = (ims & ~PCRE_IMS) | ecode[4];
      DPRINTF(("ims set to %02lx at group repeat\n", ims));
      }

    if (*ecode == OP_KETRMIN)
      {
      RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb, 0, RM8);
      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
      ecode = prev;
      flags = 0;
      goto TAIL_RECURSE;
      }
    else  /* OP_KETRMAX */
      {
      RMATCH(eptr, prev, offset_top, md, ims, eptrb, match_cbegroup, RM9);
      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
      ecode += 1 + LINK_SIZE;
      flags = 0;
      goto TAIL_RECURSE;
      }
    /* Control never gets here */

    /* An alternation is the end of a branch; scan along to find the end of the
    bracketed group and go to there. */

    case OP_ALT:
    do ecode += GET(ecode,1); while (*ecode == OP_ALT); /* PaN: OK */
    break;

    /* BRAZERO and BRAMINZERO occur just before a bracket group, indicating
    that it may occur zero times. It may repeat infinitely, or not at all -
    i.e. it could be ()* or ()? in the pattern. Brackets with fixed upper
    repeat limits are compiled as a number of copies, with the optional ones
    preceded by BRAZERO or BRAMINZERO. */

    case OP_BRAZERO:
      {
      next = ecode+1;
      RMATCH(eptr, next, offset_top, md, ims, eptrb, 0, RM10);
      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
      do next += GET(next,1); while (*next == OP_ALT); /* PaN: OK */
      ecode = next + 1 + LINK_SIZE;
      }
    break;

    case OP_BRAMINZERO:
      {
      next = ecode+1;
      do next += GET(next, 1); while (*next == OP_ALT); /* PaN: OK */
      RMATCH(eptr, next + 1+LINK_SIZE, offset_top, md, ims, eptrb, 0, RM11);
      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
      ecode++;
      }
    break;

    /* End of a group, repeated or non-repeating. */

    case OP_KET:
    case OP_KETRMIN:
    case OP_KETRMAX:
    prev = ecode - GET(ecode, 1);

    /* If this was a group that remembered the subject start, in order to break
    infinite repeats of empty string matches, retrieve the subject start from
    the chain. Otherwise, set it NULL. */

    if (*prev >= OP_SBRA)
      {
      saved_eptr = eptrb->epb_saved_eptr;   /* Value at start of group */
      eptrb = eptrb->epb_prev;              /* Backup to previous group */
      }
    else saved_eptr = NULL;

    /* If we are at the end of an assertion group, stop matching and return
    MATCH_MATCH, but record the current high water mark for use by positive
    assertions. Do this also for the "once" (atomic) groups. */

    if (*prev == OP_ASSERT || *prev == OP_ASSERT_NOT ||
        *prev == OP_ASSERTBACK || *prev == OP_ASSERTBACK_NOT ||
        *prev == OP_ONCE)
      {
      md->end_match_ptr = eptr;      /* For ONCE */
      md->end_offset_top = offset_top;
      RRETURN(MATCH_MATCH);
      }

    /* For capturing groups we have to check the group number back at the start
    and if necessary complete handling an extraction by setting the offsets and
    bumping the high water mark. Note that whole-pattern recursion is coded as
    a recurse into group 0, so it won't be picked up here. Instead, we catch it
    when the OP_END is reached. Other recursion is handled here. */

    if (*prev == OP_CBRA || *prev == OP_SCBRA)
      {
      number = GET2(prev, 1+LINK_SIZE);
      offset = number << 1;

#ifdef DEBUG
      printf("end bracket %d", number);
      printf("\n");
#endif

      md->capture_last = number;
      if (offset >= md->offset_max) md->offset_overflow = TRUE; else
        {
        md->offset_vector[offset] =
          md->offset_vector[md->offset_end - number];
        md->offset_vector[offset+1] = eptr - md->start_subject;
        if (offset_top <= offset) offset_top = offset + 2;
        }

      /* Handle a recursively called group. Restore the offsets
      appropriately and continue from after the call. */

      if (md->recursive != NULL && md->recursive->group_num == number)
        {
        recursion_info *rec = md->recursive;
        DPRINTF(("Recursion (%d) succeeded - continuing\n", number));
        md->recursive = rec->prevrec;
        mstart = rec->save_start;
        memcpy(md->offset_vector, rec->offset_save,
          rec->saved_max * sizeof(int));
        ecode = rec->after_call;
        ims = original_ims;
        break;
        }
      }

    /* For both capturing and non-capturing groups, reset the value of the ims
    flags, in case they got changed during the group. */

    ims = original_ims;
    DPRINTF(("ims reset to %02lx\n", ims));

    /* For a non-repeating ket, just continue at this level. This also
    happens for a repeating ket if no characters were matched in the group.
    This is the forcible breaking of infinite loops as implemented in Perl
    5.005. If there is an options reset, it will get obeyed in the normal
    course of events. */

    if (*ecode == OP_KET || eptr == saved_eptr)
      {
      ecode += 1 + LINK_SIZE;
      break;
      }

    /* The repeating kets try the rest of the pattern or restart from the
    preceding bracket, in the appropriate order. In the second case, we can use
    tail recursion to avoid using another stack frame, unless we have an
    unlimited repeat of a group that can match an empty string. */

    flags = (*prev >= OP_SBRA)? match_cbegroup : 0;

    if (*ecode == OP_KETRMIN)
      {
      RMATCH(eptr, ecode + 1 + LINK_SIZE, offset_top, md, ims, eptrb, 0, RM12);
      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
      if (flags != 0)    /* Could match an empty string */
        {
        RMATCH(eptr, prev, offset_top, md, ims, eptrb, flags, RM50);
        RRETURN(rrc);
        }
      ecode = prev;
      goto TAIL_RECURSE;
      }
    else  /* OP_KETRMAX */
      {
      RMATCH(eptr, prev, offset_top, md, ims, eptrb, flags, RM13);
      if (rrc != MATCH_NOMATCH) RRETURN(rrc);
      ecode += 1 + LINK_SIZE;
      flags = 0;
      goto TAIL_RECURSE;
      }
    /* Control never gets here */

    /* Start of subject unless notbol, or after internal newline if multiline */

    case OP_CIRC:
    if (md->notbol && eptr == md->start_subject) RRETURN(MATCH_NOMATCH);
    if ((ims & PCRE_MULTILINE) != 0)
      {
      if (eptr != md->start_subject &&
          (eptr >= md->end_subject || !WAS_NEWLINE(eptr)))
        RRETURN(MATCH_NOMATCH);
      ecode++;
      break;
      }
    /* ... else fall through */

    /* Start of subject assertion */

    case OP_SOD:
    if (eptr != md->start_subject) RRETURN(MATCH_NOMATCH);
    ecode++;
    break;

    /* Start of match assertion */

    case OP_SOM:
    if (eptr != md->start_subject + md->start_offset) RRETURN(MATCH_NOMATCH);
    ecode++;
    break;

    /* Reset the start of match point */

    case OP_SET_SOM:
    mstart = eptr;
    ecode++;
    break;

    /* Assert before internal newline if multiline, or before a terminating
    newline unless endonly is set, else end of subject unless noteol is set. */

    case OP_DOLL:
    if ((ims & PCRE_MULTILINE) != 0)
      {
      if (eptr < md->end_subject)
        { if (!IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH); }
      else
        { if (md->noteol) RRETURN(MATCH_NOMATCH); }
      ecode++;
      break;
      }
    else
      {
      if (md->noteol) RRETURN(MATCH_NOMATCH);
      if (!md->endonly)
        {
        if (eptr != md->end_subject &&
            (!IS_NEWLINE(eptr) || eptr != md->end_subject - md->nllen))
          RRETURN(MATCH_NOMATCH);
        ecode++;
        break;
        }
      }
    /* ... else fall through for endonly */

    /* End of subject assertion (\z) */

    case OP_EOD:
    if (eptr < md->end_subject) RRETURN(MATCH_NOMATCH);
    ecode++;
    break;

    /* End of subject or ending \n assertion (\Z) */

    case OP_EODN:
    if (eptr != md->end_subject &&
        (!IS_NEWLINE(eptr) || eptr != md->end_subject - md->nllen))
      RRETURN(MATCH_NOMATCH);
    ecode++;
    break;

    /* Word boundary assertions */

    case OP_NOT_WORD_BOUNDARY:
    case OP_WORD_BOUNDARY:
      {

      /* Find out if the previous and current characters are "word" characters.
      It takes a bit more work in UTF-8 mode. Characters > 255 are assumed to
      be "non-word" characters. */

#ifdef SUPPORT_UTF8
      if (utf8)
        {
        if (eptr == md->start_subject) prev_is_word = FALSE; else
          {
          const uschar *lastptr = eptr - 1;
          while((*lastptr & 0xc0) == 0x80) lastptr--; /* PaN: OK */
          GETCHAR(c, lastptr);
          prev_is_word = c < 256 && (md->ctypes[c] & ctype_word) != 0;
          }
        if (eptr >= md->end_subject) cur_is_word = FALSE; else
          {
          GETCHAR(c, eptr);
          cur_is_word = c < 256 && (md->ctypes[c] & ctype_word) != 0;
          }
        }
      else
#endif

      /* More streamlined when not in UTF-8 mode */

        {
        prev_is_word = (eptr != md->start_subject) &&
          ((md->ctypes[eptr[-1]] & ctype_word) != 0);
        cur_is_word = (eptr < md->end_subject) &&
          ((md->ctypes[*eptr] & ctype_word) != 0);
        }

      /* Now see if the situation is what we want */

      if ((*ecode++ == OP_WORD_BOUNDARY)?
           cur_is_word == prev_is_word : cur_is_word != prev_is_word)
        RRETURN(MATCH_NOMATCH);
      }
    break;

    /* Match a single character type; inline for speed */

    case OP_ANY:
    if ((ims & PCRE_DOTALL) == 0)
      {
      if (IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH);
      }
    if (eptr++ >= md->end_subject) RRETURN(MATCH_NOMATCH);
    if (utf8)
      while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++; /* PaN: OK */
    ecode++;
    break;

    /* Match a single byte, even in UTF-8 mode. This opcode really does match
    any byte, even newline, independent of the setting of PCRE_DOTALL. */

    case OP_ANYBYTE:
    if (eptr++ >= md->end_subject) RRETURN(MATCH_NOMATCH);
    ecode++;
    break;

    case OP_NOT_DIGIT:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    GETCHARINCTEST(c, eptr);
    if (
#ifdef SUPPORT_UTF8
       c < 256 &&
#endif
       (md->ctypes[c] & ctype_digit) != 0
       )
      RRETURN(MATCH_NOMATCH);
    ecode++;
    break;

    case OP_DIGIT:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    GETCHARINCTEST(c, eptr);
    if (
#ifdef SUPPORT_UTF8
       c >= 256 ||
#endif
       (md->ctypes[c] & ctype_digit) == 0
       )
      RRETURN(MATCH_NOMATCH);
    ecode++;
    break;

    case OP_NOT_WHITESPACE:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    GETCHARINCTEST(c, eptr);
    if (
#ifdef SUPPORT_UTF8
       c < 256 &&
#endif
       (md->ctypes[c] & ctype_space) != 0
       )
      RRETURN(MATCH_NOMATCH);
    ecode++;
    break;

    case OP_WHITESPACE:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    GETCHARINCTEST(c, eptr);
    if (
#ifdef SUPPORT_UTF8
       c >= 256 ||
#endif
       (md->ctypes[c] & ctype_space) == 0
       )
      RRETURN(MATCH_NOMATCH);
    ecode++;
    break;

    case OP_NOT_WORDCHAR:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    GETCHARINCTEST(c, eptr);
    if (
#ifdef SUPPORT_UTF8
       c < 256 &&
#endif
       (md->ctypes[c] & ctype_word) != 0
       )
      RRETURN(MATCH_NOMATCH);
    ecode++;
    break;

    case OP_WORDCHAR:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    GETCHARINCTEST(c, eptr);
    if (
#ifdef SUPPORT_UTF8
       c >= 256 ||
#endif
       (md->ctypes[c] & ctype_word) == 0
       )
      RRETURN(MATCH_NOMATCH);
    ecode++;
    break;

    case OP_ANYNL:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    GETCHARINCTEST(c, eptr);
    switch(c)
      {
      default: RRETURN(MATCH_NOMATCH);
      case 0x000d:
      if (eptr < md->end_subject && *eptr == 0x0a) eptr++;
      break;

      case 0x000a:
      break;

      case 0x000b:
      case 0x000c:
      case 0x0085:
      case 0x2028:
      case 0x2029:
      if (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH);
      break;
      }
    ecode++;
    break;

    case OP_NOT_HSPACE:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    GETCHARINCTEST(c, eptr);
    switch(c)
      {
      default: break;
      case 0x09:      /* HT */
      case 0x20:      /* SPACE */
      case 0xa0:      /* NBSP */
      case 0x1680:    /* OGHAM SPACE MARK */
      case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
      case 0x2000:    /* EN QUAD */
      case 0x2001:    /* EM QUAD */
      case 0x2002:    /* EN SPACE */
      case 0x2003:    /* EM SPACE */
      case 0x2004:    /* THREE-PER-EM SPACE */
      case 0x2005:    /* FOUR-PER-EM SPACE */
      case 0x2006:    /* SIX-PER-EM SPACE */
      case 0x2007:    /* FIGURE SPACE */
      case 0x2008:    /* PUNCTUATION SPACE */
      case 0x2009:    /* THIN SPACE */
      case 0x200A:    /* HAIR SPACE */
      case 0x202f:    /* NARROW NO-BREAK SPACE */
      case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
      case 0x3000:    /* IDEOGRAPHIC SPACE */
      RRETURN(MATCH_NOMATCH);
      }
    ecode++;
    break;

    case OP_HSPACE:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    GETCHARINCTEST(c, eptr);
    switch(c)
      {
      default: RRETURN(MATCH_NOMATCH);
      case 0x09:      /* HT */
      case 0x20:      /* SPACE */
      case 0xa0:      /* NBSP */
      case 0x1680:    /* OGHAM SPACE MARK */
      case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
      case 0x2000:    /* EN QUAD */
      case 0x2001:    /* EM QUAD */
      case 0x2002:    /* EN SPACE */
      case 0x2003:    /* EM SPACE */
      case 0x2004:    /* THREE-PER-EM SPACE */
      case 0x2005:    /* FOUR-PER-EM SPACE */
      case 0x2006:    /* SIX-PER-EM SPACE */
      case 0x2007:    /* FIGURE SPACE */
      case 0x2008:    /* PUNCTUATION SPACE */
      case 0x2009:    /* THIN SPACE */
      case 0x200A:    /* HAIR SPACE */
      case 0x202f:    /* NARROW NO-BREAK SPACE */
      case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
      case 0x3000:    /* IDEOGRAPHIC SPACE */
      break;
      }
    ecode++;
    break;

    case OP_NOT_VSPACE:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    GETCHARINCTEST(c, eptr);
    switch(c)
      {
      default: break;
      case 0x0a:      /* LF */
      case 0x0b:      /* VT */
      case 0x0c:      /* FF */
      case 0x0d:      /* CR */
      case 0x85:      /* NEL */
      case 0x2028:    /* LINE SEPARATOR */
      case 0x2029:    /* PARAGRAPH SEPARATOR */
      RRETURN(MATCH_NOMATCH);
      }
    ecode++;
    break;

    case OP_VSPACE:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    GETCHARINCTEST(c, eptr);
    switch(c)
      {
      default: RRETURN(MATCH_NOMATCH);
      case 0x0a:      /* LF */
      case 0x0b:      /* VT */
      case 0x0c:      /* FF */
      case 0x0d:      /* CR */
      case 0x85:      /* NEL */
      case 0x2028:    /* LINE SEPARATOR */
      case 0x2029:    /* PARAGRAPH SEPARATOR */
      break;
      }
    ecode++;
    break;

#ifdef SUPPORT_UCP
    /* Check the next character by Unicode property. We will get here only
    if the support is in the binary; otherwise a compile-time error occurs. */

    case OP_PROP:
    case OP_NOTPROP:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    GETCHARINCTEST(c, eptr);
      {
      int chartype, script;
      int category = _erts_pcre_ucp_findprop(c, &chartype, &script);

      switch(ecode[1])
        {
        case PT_ANY:
        if (op == OP_NOTPROP) RRETURN(MATCH_NOMATCH);
        break;

        case PT_LAMP:
        if ((chartype == ucp_Lu ||
             chartype == ucp_Ll ||
             chartype == ucp_Lt) == (op == OP_NOTPROP))
          RRETURN(MATCH_NOMATCH);
         break;

        case PT_GC:
        if ((ecode[2] != category) == (op == OP_PROP))
          RRETURN(MATCH_NOMATCH);
        break;

        case PT_PC:
        if ((ecode[2] != chartype) == (op == OP_PROP))
          RRETURN(MATCH_NOMATCH);
        break;

        case PT_SC:
        if ((ecode[2] != script) == (op == OP_PROP))
          RRETURN(MATCH_NOMATCH);
        break;

        default:
        RRETURN(PCRE_ERROR_INTERNAL);
        }

      ecode += 3;
      }
    break;

    /* Match an extended Unicode sequence. We will get here only if the support
    is in the binary; otherwise a compile-time error occurs. */

    case OP_EXTUNI:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    GETCHARINCTEST(c, eptr);
      {
      int chartype, script;
      int category = _erts_pcre_ucp_findprop(c, &chartype, &script);
      if (category == ucp_M) RRETURN(MATCH_NOMATCH);
      while (eptr < md->end_subject) /* PaN: OK */
        {
        int len = 1;
        if (!utf8) c = *eptr; else
          {
          GETCHARLEN(c, eptr, len);
          }
        category = _erts_pcre_ucp_findprop(c, &chartype, &script);
        if (category != ucp_M) break;
        eptr += len;
	COST_CHK(1);
        }
      }
    ecode++;
    break;
#endif


    /* Match a back reference, possibly repeatedly. Look past the end of the
    item to see if there is repeat information following. The code is similar
    to that for character classes, but repeated for efficiency. Then obey
    similar code to character type repeats - written out again for speed.
    However, if the referenced string is the empty string, always treat
    it as matched, any number of times (otherwise there could be infinite
    loops). */

    case OP_REF:
      {
      offset = GET2(ecode, 1) << 1;               /* Doubled ref number */
      ecode += 3;                                 /* Advance past item */

      /* If the reference is unset, set the length to be longer than the amount
      of subject left; this ensures that every attempt at a match fails. We
      can't just fail here, because of the possibility of quantifiers with zero
      minima. */

      length = (offset >= offset_top || md->offset_vector[offset] < 0)?
        md->end_subject - eptr + 1 :
        md->offset_vector[offset+1] - md->offset_vector[offset];

      /* Set up for repetition, or handle the non-repeated case */

      switch (*ecode)
        {
        case OP_CRSTAR:
        case OP_CRMINSTAR:
        case OP_CRPLUS:
        case OP_CRMINPLUS:
        case OP_CRQUERY:
        case OP_CRMINQUERY:
        c = *ecode++ - OP_CRSTAR;
        minimize = (c & 1) != 0;
        min = rep_min[c];                 /* Pick up values from tables; */
        max = rep_max[c];                 /* zero for max => infinity */
        if (max == 0) max = INT_MAX;
        break;

        case OP_CRRANGE:
        case OP_CRMINRANGE:
        minimize = (*ecode == OP_CRMINRANGE);
        min = GET2(ecode, 1);
        max = GET2(ecode, 3);
        if (max == 0) max = INT_MAX;
        ecode += 5;
        break;

        default:               /* No repeat follows */
        if (!match_ref(offset, eptr, length, md, ims)) RRETURN(MATCH_NOMATCH);
        eptr += length;
        continue;              /* With the main loop */
        }

      /* If the length of the reference is zero, just continue with the
      main loop. */

      if (length == 0) continue;

      /* First, ensure the minimum number of matches are present. We get back
      the length of the reference string explicitly rather than passing the
      address of eptr, so that eptr can be a register variable. */

      COST(min);
      for (i = 1; i <= min; i++) 
        {
        if (!match_ref(offset, eptr, length, md, ims)) RRETURN(MATCH_NOMATCH);
        eptr += length;
        }

      /* If min = max, continue at the same level without recursion.
      They are not both allowed to be zero. */

      if (min == max) continue;

      /* If minimizing, keep trying and advancing the pointer */

      if (minimize)
        {
        for (fi = min;; fi++) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM14);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          if (fi >= max || !match_ref(offset, eptr, length, md, ims))
            RRETURN(MATCH_NOMATCH);
          eptr += length;
          }
        /* Control never gets here */
        }

      /* If maximizing, find the longest string and work backwards */

      else
        {
        pp = eptr;
        for (i = min; i < max; i++) /* PaN: OK */
          {
          if (!match_ref(offset, eptr, length, md, ims)) break;
          eptr += length;
	  COST_CHK(1);
          }
        while (eptr >= pp) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM15);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          eptr -= length;
          }
        RRETURN(MATCH_NOMATCH);
        }
      }
    /* Control never gets here */



    /* Match a bit-mapped character class, possibly repeatedly. This op code is
    used when all the characters in the class have values in the range 0-255,
    and either the matching is caseful, or the characters are in the range
    0-127 when UTF-8 processing is enabled. The only difference between
    OP_CLASS and OP_NCLASS occurs when a data character outside the range is
    encountered.

    First, look past the end of the item to see if there is repeat information
    following. Then obey similar code to character type repeats - written out
    again for speed. */

    case OP_NCLASS:
    case OP_CLASS:
      {
      data = ecode + 1;                /* Save for matching */
      ecode += 33;                     /* Advance past the item */
#ifdef ERLANG_INTEGRATION
	      EDEBUGF(("OP_(N)CLASS (%d)...",*ecode));
#endif

      switch (*ecode)
        {
        case OP_CRSTAR:
        case OP_CRMINSTAR:
        case OP_CRPLUS:
        case OP_CRMINPLUS:
        case OP_CRQUERY:
        case OP_CRMINQUERY:
        c = *ecode++ - OP_CRSTAR;
        minimize = (c & 1) != 0;
        min = rep_min[c];                 /* Pick up values from tables; */
        max = rep_max[c];                 /* zero for max => infinity */
        if (max == 0) max = INT_MAX;
        break;

        case OP_CRRANGE:
        case OP_CRMINRANGE:
        minimize = (*ecode == OP_CRMINRANGE);
        min = GET2(ecode, 1);
        max = GET2(ecode, 3);
        if (max == 0) max = INT_MAX;
        ecode += 5;
        break;

        default:               /* No repeat follows */
        min = max = 1;
        break;
        }

      /* First, ensure the minimum number of matches are present. */

#ifdef SUPPORT_UTF8
      /* UTF-8 mode */
      if (utf8)
        {
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          GETCHARINC(c, eptr);
          if (c > 255)
            {
            if (op == OP_CLASS) RRETURN(MATCH_NOMATCH);
            }
          else
            {
            if ((data[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH);
            }
          }
        }
      else
#endif
      /* Not UTF-8 mode */
        {
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          c = *eptr++;
          if ((data[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH);
          }
        }

      /* If max == min we can continue with the main loop without the
      need to recurse. */

      if (min == max) continue;

      /* If minimizing, keep testing the rest of the expression and advancing
      the pointer while it matches the class. */

      if (minimize)
        {
#ifdef SUPPORT_UTF8
        /* UTF-8 mode */
        if (utf8)
          {
          for (fi = min;; fi++) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM16);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            GETCHARINC(c, eptr);
            if (c > 255)
              {
              if (op == OP_CLASS) RRETURN(MATCH_NOMATCH);
              }
            else
              {
              if ((data[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH);
              }
            }
          }
        else
#endif
        /* Not UTF-8 mode */
          {
	    for (fi = min;; fi++) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM17);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            c = *eptr++;
            if ((data[c/8] & (1 << (c&7))) == 0) RRETURN(MATCH_NOMATCH);
            }
          }
        /* Control never gets here */
        }

      /* If maximizing, find the longest possible run, then work backwards. */

      else
        {
        pp = eptr;

#ifdef SUPPORT_UTF8
        /* UTF-8 mode */
        if (utf8)
          {
          for (i = min; i < max; i++) /* PaN: OK */
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            if (c > 255)
              {
              if (op == OP_CLASS) break;
              }
            else
              {
              if ((data[c/8] & (1 << (c&7))) == 0) break;
              }
            eptr += len;
	    COST_CHK(1);
            }
          for (;;) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM18);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (eptr-- == pp) break;        /* Stop if tried at original pos */
            BACKCHAR(eptr);
            }
          }
        else
#endif
          /* Not UTF-8 mode */
          {
          for (i = min; i < max; i++) /* PaN: OK */
            {
            if (eptr >= md->end_subject) break;
            c = *eptr;
            if ((data[c/8] & (1 << (c&7))) == 0) break;
            eptr++;
	    COST_CHK(1);
            }
          while (eptr >= pp) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM19);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            eptr--;
            }
          }

        RRETURN(MATCH_NOMATCH);
        }
      }
    /* Control never gets here */


    /* Match an extended character class. This opcode is encountered only
    in UTF-8 mode, because that's the only time it is compiled. */

#ifdef SUPPORT_UTF8
    case OP_XCLASS:
      {
      data = ecode + 1 + LINK_SIZE;                /* Save for matching */
      ecode += GET(ecode, 1);                      /* Advance past the item */

      switch (*ecode)
        {
        case OP_CRSTAR:
        case OP_CRMINSTAR:
        case OP_CRPLUS:
        case OP_CRMINPLUS:
        case OP_CRQUERY:
        case OP_CRMINQUERY:
        c = *ecode++ - OP_CRSTAR;
        minimize = (c & 1) != 0;
        min = rep_min[c];                 /* Pick up values from tables; */
        max = rep_max[c];                 /* zero for max => infinity */
        if (max == 0) max = INT_MAX;
        break;

        case OP_CRRANGE:
        case OP_CRMINRANGE:
        minimize = (*ecode == OP_CRMINRANGE);
        min = GET2(ecode, 1);
        max = GET2(ecode, 3);
        if (max == 0) max = INT_MAX;
        ecode += 5;
        break;

        default:               /* No repeat follows */
        min = max = 1;
        break;
        }

      /* First, ensure the minimum number of matches are present. */

      COST(min);
      for (i = 1; i <= min; i++)
        {
        if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
        GETCHARINC(c, eptr);
        if (!_erts_pcre_xclass(c, data)) RRETURN(MATCH_NOMATCH);
        }

      /* If max == min we can continue with the main loop without the
      need to recurse. */

      if (min == max) continue;

      /* If minimizing, keep testing the rest of the expression and advancing
      the pointer while it matches the class. */

      if (minimize)
        {
        for (fi = min;; fi++) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM20);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          GETCHARINC(c, eptr);
          if (!_erts_pcre_xclass(c, data)) RRETURN(MATCH_NOMATCH);
          }
        /* Control never gets here */
        }

      /* If maximizing, find the longest possible run, then work backwards. */

      else
        {
        pp = eptr;
        for (i = min; i < max; i++)
          {
          int len = 1;
          if (eptr >= md->end_subject) break;
          GETCHARLEN(c, eptr, len);
          if (!_erts_pcre_xclass(c, data)) break;
          eptr += len;
	  COST_CHK(1);
          }
        for(;;) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM21);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          if (eptr-- == pp) break;        /* Stop if tried at original pos */
          if (utf8) BACKCHAR(eptr);
          }
        RRETURN(MATCH_NOMATCH);
        }

      /* Control never gets here */
      }
#endif    /* End of XCLASS */

    /* Match a single character, casefully */

    case OP_CHAR:
#ifdef SUPPORT_UTF8
    if (utf8)
      {
      length = 1;
      ecode++;
      GETCHARLEN(fc, ecode, length);
      if (length > md->end_subject - eptr) RRETURN(MATCH_NOMATCH);
      while (length-- > 0) if (*ecode++ != *eptr++) RRETURN(MATCH_NOMATCH); /* PaN: OK */
      }
    else
#endif

    /* Non-UTF-8 mode */
      {
      if (md->end_subject - eptr < 1) RRETURN(MATCH_NOMATCH);
      EDEBUGF(("code to match:%d, code is:%d",ecode[1],*eptr));
      if (ecode[1] != *eptr++) RRETURN(MATCH_NOMATCH);
      ecode += 2;
      }
    break;

    /* Match a single character, caselessly */

    case OP_CHARNC:
#ifdef SUPPORT_UTF8
    if (utf8)
      {
      length = 1;
      ecode++;
      GETCHARLEN(fc, ecode, length);

      if (length > md->end_subject - eptr) RRETURN(MATCH_NOMATCH);

      /* If the pattern character's value is < 128, we have only one byte, and
      can use the fast lookup table. */

      if (fc < 128)
        {
        if (md->lcc[*ecode++] != md->lcc[*eptr++]) RRETURN(MATCH_NOMATCH);
        }

      /* Otherwise we must pick up the subject character */

      else
        {
        unsigned int dc;
        GETCHARINC(dc, eptr);
        ecode += length;

        /* If we have Unicode property support, we can use it to test the other
        case of the character, if there is one. */

        if (fc != dc)
          {
#ifdef SUPPORT_UCP
          if (dc != _erts_pcre_ucp_othercase(fc))
#endif
            RRETURN(MATCH_NOMATCH);
          }
        }
      }
    else
#endif   /* SUPPORT_UTF8 */

    /* Non-UTF-8 mode */
      {
      if (md->end_subject - eptr < 1) RRETURN(MATCH_NOMATCH);
      if (md->lcc[ecode[1]] != md->lcc[*eptr++]) RRETURN(MATCH_NOMATCH);
      ecode += 2;
      }
    break;

    /* Match a single character repeatedly. */

    case OP_EXACT:
    min = max = GET2(ecode, 1);
    ecode += 3;
    goto REPEATCHAR;

    case OP_POSUPTO:
    possessive = TRUE;
    /* Fall through */

    case OP_UPTO:
    case OP_MINUPTO:
    min = 0;
    max = GET2(ecode, 1);
    minimize = *ecode == OP_MINUPTO;
    ecode += 3;
    goto REPEATCHAR;

    case OP_POSSTAR:
    possessive = TRUE;
    min = 0;
    max = INT_MAX;
    ecode++;
    goto REPEATCHAR;

    case OP_POSPLUS:
    possessive = TRUE;
    min = 1;
    max = INT_MAX;
    ecode++;
    goto REPEATCHAR;

    case OP_POSQUERY:
    possessive = TRUE;
    min = 0;
    max = 1;
    ecode++;
    goto REPEATCHAR;

    case OP_STAR:
    case OP_MINSTAR:
    case OP_PLUS:
    case OP_MINPLUS:
    case OP_QUERY:
    case OP_MINQUERY:
    c = *ecode++ - OP_STAR;
    minimize = (c & 1) != 0;
    min = rep_min[c];                 /* Pick up values from tables; */
    max = rep_max[c];                 /* zero for max => infinity */
    if (max == 0) max = INT_MAX;

    /* Common code for all repeated single-character matches. We can give
    up quickly if there are fewer than the minimum number of characters left in
    the subject. */

    REPEATCHAR:
#ifdef SUPPORT_UTF8
    if (utf8)
      {
      length = 1;
      charptr = ecode;
      GETCHARLEN(fc, ecode, length);
      if (min * length > md->end_subject - eptr) RRETURN(MATCH_NOMATCH);
      ecode += length;

      /* Handle multibyte character matching specially here. There is
      support for caseless matching if UCP support is present. */

      if (length > 1)
        {
#ifdef SUPPORT_UCP
        unsigned int othercase;
        if ((ims & PCRE_CASELESS) != 0 &&
            (othercase = _erts_pcre_ucp_othercase(fc)) != NOTACHAR)
          oclength = _erts_pcre_ord2utf8(othercase, occhars);
        else oclength = 0;
#endif  /* SUPPORT_UCP */
	COST(min);
        for (i = 1; i <= min; i++) /* PaN: Cost min (?) */
          {
          if (memcmp(eptr, charptr, length) == 0) eptr += length;
#ifdef SUPPORT_UCP
          /* Need braces because of following else */
          else if (oclength == 0) { RRETURN(MATCH_NOMATCH); }
          else
            {
            if (memcmp(eptr, occhars, oclength) != 0) RRETURN(MATCH_NOMATCH);
            eptr += oclength;
            }
#else   /* without SUPPORT_UCP */
          else { RRETURN(MATCH_NOMATCH); }
#endif  /* SUPPORT_UCP */
          }

        if (min == max) continue;

        if (minimize)
          {
          for (fi = min;; fi++) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM22);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            if (memcmp(eptr, charptr, length) == 0) eptr += length;
#ifdef SUPPORT_UCP
            /* Need braces because of following else */
            else if (oclength == 0) { RRETURN(MATCH_NOMATCH); }
            else
              {
              if (memcmp(eptr, occhars, oclength) != 0) RRETURN(MATCH_NOMATCH);
              eptr += oclength;
              }
#else   /* without SUPPORT_UCP */
            else { RRETURN (MATCH_NOMATCH); }
#endif  /* SUPPORT_UCP */
            }
          /* Control never gets here */
          }

        else  /* Maximize */
          {
          pp = eptr;
          for (i = min; i < max; i++)
            {
	    if (eptr > md->end_subject - length) break;
            if (memcmp(eptr, charptr, length) == 0) eptr += length;
#ifdef SUPPORT_UCP
            else if (oclength == 0) break;
            else
              {
              if (memcmp(eptr, occhars, oclength) != 0) break;
              eptr += oclength;
              }
#else   /* without SUPPORT_UCP */
            else break;
#endif  /* SUPPORT_UCP */
	    COST_CHK(1);
            }

          if (possessive) continue;
          for(;;) /* PaN: OK */
           {
           RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM23);
           if (rrc != MATCH_NOMATCH) RRETURN(rrc);
           if (eptr == pp) RRETURN(MATCH_NOMATCH);
#ifdef SUPPORT_UCP
           eptr--;
           BACKCHAR(eptr);
#else   /* without SUPPORT_UCP */
           eptr -= length;
#endif  /* SUPPORT_UCP */
           }
          }
        /* Control never gets here */
        }

      /* If the length of a UTF-8 character is 1, we fall through here, and
      obey the code as for non-UTF-8 characters below, though in this case the
      value of fc will always be < 128. */
      }
    else
#endif  /* SUPPORT_UTF8 */

    /* When not in UTF-8 mode, load a single-byte character. */
      {
      if (min > md->end_subject - eptr) RRETURN(MATCH_NOMATCH);
      fc = *ecode++;
      }

    /* The value of fc at this point is always less than 256, though we may or
    may not be in UTF-8 mode. The code is duplicated for the caseless and
    caseful cases, for speed, since matching characters is likely to be quite
    common. First, ensure the minimum number of matches are present. If min =
    max, continue at the same level without recursing. Otherwise, if
    minimizing, keep trying the rest of the expression and advancing one
    matching character if failing, up to the maximum. Alternatively, if
    maximizing, find the maximum number of characters and work backwards. */

    DPRINTF(("matching %c{%d,%d} against subject %.*s\n", fc, min, max,
      max, eptr));

    if ((ims & PCRE_CASELESS) != 0)
      {
      fc = md->lcc[fc];
      COST(min);
      for (i = 1; i <= min; i++)
        if (fc != md->lcc[*eptr++]) RRETURN(MATCH_NOMATCH);
      if (min == max) continue;
      if (minimize)
        {
        for (fi = min;; fi++) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM24);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          if (fi >= max || eptr >= md->end_subject ||
              fc != md->lcc[*eptr++])
            RRETURN(MATCH_NOMATCH);
          }
        /* Control never gets here */
        }
      else  /* Maximize */
        {
        pp = eptr;
        for (i = min; i < max; i++)
          {
          if (eptr >= md->end_subject || fc != md->lcc[*eptr]) break;
          eptr++;
	  COST_CHK(1);
          }
        if (possessive) continue;
        while (eptr >= pp) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM25);
          eptr--;
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          }
        RRETURN(MATCH_NOMATCH);
        }
      /* Control never gets here */
      }

    /* Caseful comparisons (includes all multi-byte characters) */

    else
      {
      COST(min);
      for (i = 1; i <= min; i++) if (fc != *eptr++) RRETURN(MATCH_NOMATCH);
      if (min == max) continue;
      if (minimize)
        {
        for (fi = min;; fi++) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM26);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          if (fi >= max || eptr >= md->end_subject || fc != *eptr++)
            RRETURN(MATCH_NOMATCH);
          }
        /* Control never gets here */
        }
      else  /* Maximize */
        {
        pp = eptr;
        for (i = min; i < max; i++)
          {
          if (eptr >= md->end_subject || fc != *eptr) break;
          eptr++;
	  COST_CHK(1);
          }
        if (possessive) continue;
        while (eptr >= pp) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM27);
          eptr--;
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          }
        RRETURN(MATCH_NOMATCH);
        }
      }
    /* Control never gets here */

    /* Match a negated single one-byte character. The character we are
    checking can be multibyte. */

    case OP_NOT:
    if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
    ecode++;
    GETCHARINCTEST(c, eptr);
    if ((ims & PCRE_CASELESS) != 0)
      {
#ifdef SUPPORT_UTF8
      if (c < 256)
#endif
      c = md->lcc[c];
      if (md->lcc[*ecode++] == c) RRETURN(MATCH_NOMATCH);
      }
    else
      {
      if (*ecode++ == c) RRETURN(MATCH_NOMATCH);
      }
    break;

    /* Match a negated single one-byte character repeatedly. This is almost a
    repeat of the code for a repeated single character, but I haven't found a
    nice way of commoning these up that doesn't require a test of the
    positive/negative option for each character match. Maybe that wouldn't add
    very much to the time taken, but character matching *is* what this is all
    about... */

    case OP_NOTEXACT:
    min = max = GET2(ecode, 1);
    ecode += 3;
    goto REPEATNOTCHAR;

    case OP_NOTUPTO:
    case OP_NOTMINUPTO:
    min = 0;
    max = GET2(ecode, 1);
    minimize = *ecode == OP_NOTMINUPTO;
    ecode += 3;
    goto REPEATNOTCHAR;

    case OP_NOTPOSSTAR:
    possessive = TRUE;
    min = 0;
    max = INT_MAX;
    ecode++;
    goto REPEATNOTCHAR;

    case OP_NOTPOSPLUS:
    possessive = TRUE;
    min = 1;
    max = INT_MAX;
    ecode++;
    goto REPEATNOTCHAR;

    case OP_NOTPOSQUERY:
    possessive = TRUE;
    min = 0;
    max = 1;
    ecode++;
    goto REPEATNOTCHAR;

    case OP_NOTPOSUPTO:
    possessive = TRUE;
    min = 0;
    max = GET2(ecode, 1);
    ecode += 3;
    goto REPEATNOTCHAR;

    case OP_NOTSTAR:
    case OP_NOTMINSTAR:
    case OP_NOTPLUS:
    case OP_NOTMINPLUS:
    case OP_NOTQUERY:
    case OP_NOTMINQUERY:
    c = *ecode++ - OP_NOTSTAR;
    minimize = (c & 1) != 0;
    min = rep_min[c];                 /* Pick up values from tables; */
    max = rep_max[c];                 /* zero for max => infinity */
    if (max == 0) max = INT_MAX;

    /* Common code for all repeated single-byte matches. We can give up quickly
    if there are fewer than the minimum number of bytes left in the
    subject. */

    REPEATNOTCHAR:
    if (min > md->end_subject - eptr) RRETURN(MATCH_NOMATCH);
    fc = *ecode++;

    /* The code is duplicated for the caseless and caseful cases, for speed,
    since matching characters is likely to be quite common. First, ensure the
    minimum number of matches are present. If min = max, continue at the same
    level without recursing. Otherwise, if minimizing, keep trying the rest of
    the expression and advancing one matching character if failing, up to the
    maximum. Alternatively, if maximizing, find the maximum number of
    characters and work backwards. */

    DPRINTF(("negative matching %c{%d,%d} against subject %.*s\n", fc, min, max,
      max, eptr));

    if ((ims & PCRE_CASELESS) != 0)
      {
      fc = md->lcc[fc];

#ifdef SUPPORT_UTF8
      /* UTF-8 mode */
      if (utf8)
        {
        register unsigned int d;
	COST(min);
        for (i = 1; i <= min; i++)
          {
          GETCHARINC(d, eptr);
          if (d < 256) d = md->lcc[d];
          if (fc == d) RRETURN(MATCH_NOMATCH);
          }
        }
      else
#endif

      /* Not UTF-8 mode */
        {
	COST(min);
        for (i = 1; i <= min; i++)
          if (fc == md->lcc[*eptr++]) RRETURN(MATCH_NOMATCH);
        }

      if (min == max) continue;

      if (minimize)
        {
#ifdef SUPPORT_UTF8
        /* UTF-8 mode */
        if (utf8)
          {
          register unsigned int d;
          for (fi = min;; fi++) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM28);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            GETCHARINC(d, eptr);
            if (d < 256) d = md->lcc[d];
            if (fi >= max || eptr >= md->end_subject || fc == d)
              RRETURN(MATCH_NOMATCH);
            }
          }
        else
#endif
        /* Not UTF-8 mode */
          {
          for (fi = min;; fi++) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM29);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject || fc == md->lcc[*eptr++])
              RRETURN(MATCH_NOMATCH);
            }
          }
        /* Control never gets here */
        }

      /* Maximize case */

      else
        {
        pp = eptr;

#ifdef SUPPORT_UTF8
        /* UTF-8 mode */
        if (utf8)
          {
          register unsigned int d;
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(d, eptr, len);
            if (d < 256) d = md->lcc[d];
            if (fc == d) break;
            eptr += len;
	    COST_CHK(1);
            }
        if (possessive) continue;
        for(;;) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM30);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (eptr-- == pp) break;        /* Stop if tried at original pos */
            BACKCHAR(eptr);
            }
          }
        else
#endif
        /* Not UTF-8 mode */
          {
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject || fc == md->lcc[*eptr]) break;
            eptr++;
	    COST_CHK(1);
            }
          if (possessive) continue;
          while (eptr >= pp) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM31);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            eptr--;
            }
          }

        RRETURN(MATCH_NOMATCH);
        }
      /* Control never gets here */
      }

    /* Caseful comparisons */

    else
      {
#ifdef SUPPORT_UTF8
      /* UTF-8 mode */
      if (utf8)
        {
        register unsigned int d;
	COST(min);
        for (i = 1; i <= min; i++)
          {
          GETCHARINC(d, eptr);
          if (fc == d) RRETURN(MATCH_NOMATCH);
          }
        }
      else
#endif
      /* Not UTF-8 mode */
        {
	COST(min);
        for (i = 1; i <= min; i++)
          if (fc == *eptr++) RRETURN(MATCH_NOMATCH);
        }

      if (min == max) continue;

      if (minimize)
        {
#ifdef SUPPORT_UTF8
        /* UTF-8 mode */
        if (utf8)
          {
          register unsigned int d;
          for (fi = min;; fi++) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM32);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            GETCHARINC(d, eptr);
            if (fi >= max || eptr >= md->end_subject || fc == d)
              RRETURN(MATCH_NOMATCH);
            }
          }
        else
#endif
        /* Not UTF-8 mode */
          {
          for (fi = min;; fi++) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM33);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject || fc == *eptr++)
              RRETURN(MATCH_NOMATCH);
            }
          }
        /* Control never gets here */
        }

      /* Maximize case */

      else
        {
        pp = eptr;

#ifdef SUPPORT_UTF8
        /* UTF-8 mode */
        if (utf8)
          {
          register unsigned int d;
	  COST(min);
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(d, eptr, len);
            if (fc == d) break;
            eptr += len;
            }
          if (possessive) continue;
          for(;;) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM34);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (eptr-- == pp) break;        /* Stop if tried at original pos */
            BACKCHAR(eptr);
            }
          }
        else
#endif
        /* Not UTF-8 mode */
          {
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject || fc == *eptr) break;
            eptr++;
	    COST_CHK(1);
            }
          if (possessive) continue;
          while (eptr >= pp) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM35);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            eptr--;
            }
          }

        RRETURN(MATCH_NOMATCH);
        }
      }
    /* Control never gets here */

    /* Match a single character type repeatedly; several different opcodes
    share code. This is very similar to the code for single characters, but we
    repeat it in the interests of efficiency. */

    case OP_TYPEEXACT:
    min = max = GET2(ecode, 1);
    minimize = TRUE;
    ecode += 3;
    goto REPEATTYPE;

    case OP_TYPEUPTO:
    case OP_TYPEMINUPTO:
    min = 0;
    max = GET2(ecode, 1);
    minimize = *ecode == OP_TYPEMINUPTO;
    ecode += 3;
    goto REPEATTYPE;

    case OP_TYPEPOSSTAR:
    possessive = TRUE;
    min = 0;
    max = INT_MAX;
    ecode++;
    goto REPEATTYPE;

    case OP_TYPEPOSPLUS:
    possessive = TRUE;
    min = 1;
    max = INT_MAX;
    ecode++;
    goto REPEATTYPE;

    case OP_TYPEPOSQUERY:
    possessive = TRUE;
    min = 0;
    max = 1;
    ecode++;
    goto REPEATTYPE;

    case OP_TYPEPOSUPTO:
    possessive = TRUE;
    min = 0;
    max = GET2(ecode, 1);
    ecode += 3;
    goto REPEATTYPE;

    case OP_TYPESTAR:
    case OP_TYPEMINSTAR:
    case OP_TYPEPLUS:
    case OP_TYPEMINPLUS:
    case OP_TYPEQUERY:
    case OP_TYPEMINQUERY:
    c = *ecode++ - OP_TYPESTAR;
    minimize = (c & 1) != 0;
    min = rep_min[c];                 /* Pick up values from tables; */
    max = rep_max[c];                 /* zero for max => infinity */
    if (max == 0) max = INT_MAX;

    /* Common code for all repeated single character type matches. Note that
    in UTF-8 mode, '.' matches a character of any length, but for the other
    character types, the valid characters are all one-byte long. */

    REPEATTYPE:
    ctype = *ecode++;      /* Code for the character type */

#ifdef SUPPORT_UCP
    if (ctype == OP_PROP || ctype == OP_NOTPROP)
      {
      prop_fail_result = ctype == OP_NOTPROP;
      prop_type = *ecode++;
      prop_value = *ecode++;
      }
    else prop_type = -1;
#endif

    /* First, ensure the minimum number of matches are present. Use inline
    code for maximizing the speed, and do the type test once at the start
    (i.e. keep it out of the loop). Also we can test that there are at least
    the minimum number of bytes before we start. This isn't as effective in
    UTF-8 mode, but it does no harm. Separate the UTF-8 code completely as that
    is tidier. Also separate the UCP code, which can be the same for both UTF-8
    and single-bytes. */

    if (min > md->end_subject - eptr) RRETURN(MATCH_NOMATCH);
    if (min > 0)
      {
#ifdef SUPPORT_UCP
      if (prop_type >= 0)
        {
	COST(min);
        switch(prop_type)
          {
          case PT_ANY:
          if (prop_fail_result) RRETURN(MATCH_NOMATCH);
          for (i = 1; i <= min; i++) /* PaN: OK (cost above) */
            {
            if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            GETCHARINCTEST(c, eptr);
            }
          break;

          case PT_LAMP:
          for (i = 1; i <= min; i++) /* PaN: OK (cost above) */
            {
            if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            GETCHARINCTEST(c, eptr);
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if ((prop_chartype == ucp_Lu ||
                 prop_chartype == ucp_Ll ||
                 prop_chartype == ucp_Lt) == prop_fail_result)
              RRETURN(MATCH_NOMATCH);
            }
          break;

          case PT_GC:
          for (i = 1; i <= min; i++) /* PaN: OK (cost above) */
            {
            if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            GETCHARINCTEST(c, eptr);
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if ((prop_category == prop_value) == prop_fail_result)
              RRETURN(MATCH_NOMATCH);
            }
          break;

          case PT_PC:
          for (i = 1; i <= min; i++) /* PaN: OK (cost above) */
            {
            if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            GETCHARINCTEST(c, eptr);
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if ((prop_chartype == prop_value) == prop_fail_result)
              RRETURN(MATCH_NOMATCH);
            }
          break;

          case PT_SC:
          for (i = 1; i <= min; i++) /* PaN: OK (cost above) */
            {
            if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            GETCHARINCTEST(c, eptr);
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if ((prop_script == prop_value) == prop_fail_result)
              RRETURN(MATCH_NOMATCH);
            }
          break;

          default:
          RRETURN(PCRE_ERROR_INTERNAL);
          }
        }

      /* Match extended Unicode sequences. We will get here only if the
      support is in the binary; otherwise a compile-time error occurs. */

      else if (ctype == OP_EXTUNI) 
        {
	COST(min);
	for (i = 1; i <= min; i++)
          {
          GETCHARINCTEST(c, eptr);
          prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
          if (prop_category == ucp_M) RRETURN(MATCH_NOMATCH);
          while (eptr < md->end_subject)
            {
            int len = 1;
            if (!utf8) c = *eptr; else
              {
              GETCHARLEN(c, eptr, len);
              }
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if (prop_category != ucp_M) break;
            eptr += len;
	    COST_CHK(1);
            }
          }
        }

      else
#endif     /* SUPPORT_UCP */

/* Handle all other cases when the coding is UTF-8 */

#ifdef SUPPORT_UTF8
      if (utf8) switch(ctype)
        {
        case OP_ANY:
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject ||
               ((ims & PCRE_DOTALL) == 0 && IS_NEWLINE(eptr)))
            RRETURN(MATCH_NOMATCH);
          eptr++;
          while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
          }
        break;

        case OP_ANYBYTE:
        eptr += min;
        break;

        case OP_ANYNL:
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          GETCHARINC(c, eptr);
          switch(c)
            {
            default: RRETURN(MATCH_NOMATCH);
            case 0x000d:
            if (eptr < md->end_subject && *eptr == 0x0a) eptr++;
            break;

            case 0x000a:
            break;

            case 0x000b:
            case 0x000c:
            case 0x0085:
            case 0x2028:
            case 0x2029:
            if (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH);
            break;
            }
          }
        break;

        case OP_NOT_HSPACE:
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          GETCHARINC(c, eptr);
          switch(c)
            {
            default: break;
            case 0x09:      /* HT */
            case 0x20:      /* SPACE */
            case 0xa0:      /* NBSP */
            case 0x1680:    /* OGHAM SPACE MARK */
            case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
            case 0x2000:    /* EN QUAD */
            case 0x2001:    /* EM QUAD */
            case 0x2002:    /* EN SPACE */
            case 0x2003:    /* EM SPACE */
            case 0x2004:    /* THREE-PER-EM SPACE */
            case 0x2005:    /* FOUR-PER-EM SPACE */
            case 0x2006:    /* SIX-PER-EM SPACE */
            case 0x2007:    /* FIGURE SPACE */
            case 0x2008:    /* PUNCTUATION SPACE */
            case 0x2009:    /* THIN SPACE */
            case 0x200A:    /* HAIR SPACE */
            case 0x202f:    /* NARROW NO-BREAK SPACE */
            case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
            case 0x3000:    /* IDEOGRAPHIC SPACE */
            RRETURN(MATCH_NOMATCH);
            }
          }
        break;

        case OP_HSPACE:
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          GETCHARINC(c, eptr);
          switch(c)
            {
            default: RRETURN(MATCH_NOMATCH);
            case 0x09:      /* HT */
            case 0x20:      /* SPACE */
            case 0xa0:      /* NBSP */
            case 0x1680:    /* OGHAM SPACE MARK */
            case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
            case 0x2000:    /* EN QUAD */
            case 0x2001:    /* EM QUAD */
            case 0x2002:    /* EN SPACE */
            case 0x2003:    /* EM SPACE */
            case 0x2004:    /* THREE-PER-EM SPACE */
            case 0x2005:    /* FOUR-PER-EM SPACE */
            case 0x2006:    /* SIX-PER-EM SPACE */
            case 0x2007:    /* FIGURE SPACE */
            case 0x2008:    /* PUNCTUATION SPACE */
            case 0x2009:    /* THIN SPACE */
            case 0x200A:    /* HAIR SPACE */
            case 0x202f:    /* NARROW NO-BREAK SPACE */
            case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
            case 0x3000:    /* IDEOGRAPHIC SPACE */
            break;
            }
          }
        break;

        case OP_NOT_VSPACE:
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          GETCHARINC(c, eptr);
          switch(c)
            {
            default: break;
            case 0x0a:      /* LF */
            case 0x0b:      /* VT */
            case 0x0c:      /* FF */
            case 0x0d:      /* CR */
            case 0x85:      /* NEL */
            case 0x2028:    /* LINE SEPARATOR */
            case 0x2029:    /* PARAGRAPH SEPARATOR */
            RRETURN(MATCH_NOMATCH);
            }
          }
        break;

        case OP_VSPACE:
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          GETCHARINC(c, eptr);
          switch(c)
            {
            default: RRETURN(MATCH_NOMATCH);
            case 0x0a:      /* LF */
            case 0x0b:      /* VT */
            case 0x0c:      /* FF */
            case 0x0d:      /* CR */
            case 0x85:      /* NEL */
            case 0x2028:    /* LINE SEPARATOR */
            case 0x2029:    /* PARAGRAPH SEPARATOR */
            break;
            }
          }
        break;

        case OP_NOT_DIGIT:
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          GETCHARINC(c, eptr);
          if (c < 128 && (md->ctypes[c] & ctype_digit) != 0)
            RRETURN(MATCH_NOMATCH);
          }
        break;

        case OP_DIGIT:
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject ||
             *eptr >= 128 || (md->ctypes[*eptr++] & ctype_digit) == 0)
            RRETURN(MATCH_NOMATCH);
          /* No need to skip more bytes - we know it's a 1-byte character */
          }
        break;

        case OP_NOT_WHITESPACE:
 	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject ||
             (*eptr < 128 && (md->ctypes[*eptr] & ctype_space) != 0))
            RRETURN(MATCH_NOMATCH);
          while (++eptr < md->end_subject && (*eptr & 0xc0) == 0x80); /* PaN: Check */
          }
        break;

        case OP_WHITESPACE:
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject ||
             *eptr >= 128 || (md->ctypes[*eptr++] & ctype_space) == 0)
            RRETURN(MATCH_NOMATCH);
          /* No need to skip more bytes - we know it's a 1-byte character */
          }
        break;

        case OP_NOT_WORDCHAR: 
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject ||
             (*eptr < 128 && (md->ctypes[*eptr] & ctype_word) != 0))
            RRETURN(MATCH_NOMATCH);
          while (++eptr < md->end_subject && (*eptr & 0xc0) == 0x80); /* PaN: Check */
          }
        break;

        case OP_WORDCHAR:
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject ||
             *eptr >= 128 || (md->ctypes[*eptr++] & ctype_word) == 0)
            RRETURN(MATCH_NOMATCH);
          /* No need to skip more bytes - we know it's a 1-byte character */
          }
        break;

        default:
        RRETURN(PCRE_ERROR_INTERNAL);
        }  /* End switch(ctype) */

      else
#endif     /* SUPPORT_UTF8 */

      /* Code for the non-UTF-8 case for minimum matching of operators other
      than OP_PROP and OP_NOTPROP. We can assume that there are the minimum
      number of bytes present, as this was tested above. */

      switch(ctype)
        {
        case OP_ANY:
        if ((ims & PCRE_DOTALL) == 0)
          {
	  COST(min);
          for (i = 1; i <= min; i++)
            {
            if (IS_NEWLINE(eptr)) RRETURN(MATCH_NOMATCH);
            eptr++;
            }
          }
        else eptr += min;
        break;

        case OP_ANYBYTE:
        eptr += min;
        break;

        /* Because of the CRLF case, we can't assume the minimum number of
        bytes are present in this case. */

        case OP_ANYNL:
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          switch(*eptr++)
            {
            default: RRETURN(MATCH_NOMATCH);
            case 0x000d:
            if (eptr < md->end_subject && *eptr == 0x0a) eptr++;
            break;
            case 0x000a:
            break;

            case 0x000b:
            case 0x000c:
            case 0x0085:
            if (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH);
            break;
            }
          }
        break;

        case OP_NOT_HSPACE:
	COST(min);
        for (i = 1; i <= min; i++) /* PaN: Check */
          {
          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          switch(*eptr++)
            {
            default: break;
            case 0x09:      /* HT */
            case 0x20:      /* SPACE */
            case 0xa0:      /* NBSP */
            RRETURN(MATCH_NOMATCH);
            }
          }
        break;

        case OP_HSPACE:
	COST(min);
        for (i = 1; i <= min; i++) /* PaN: Check */
          {
          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          switch(*eptr++)
            {
            default: RRETURN(MATCH_NOMATCH);
            case 0x09:      /* HT */
            case 0x20:      /* SPACE */
            case 0xa0:      /* NBSP */
            break;
            }
          }
        break;

        case OP_NOT_VSPACE:
	COST(min);
        for (i = 1; i <= min; i++) /* PaN: Check */
          {
          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          switch(*eptr++)
            {
            default: break;
            case 0x0a:      /* LF */
            case 0x0b:      /* VT */
            case 0x0c:      /* FF */
            case 0x0d:      /* CR */
            case 0x85:      /* NEL */
            RRETURN(MATCH_NOMATCH);
            }
          }
        break;

        case OP_VSPACE:
	COST(min);
        for (i = 1; i <= min; i++)
          {
          if (eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          switch(*eptr++)
            {
            default: RRETURN(MATCH_NOMATCH);
            case 0x0a:      /* LF */
            case 0x0b:      /* VT */
            case 0x0c:      /* FF */
            case 0x0d:      /* CR */
            case 0x85:      /* NEL */
            break;
            }
          }
        break;

        case OP_NOT_DIGIT:
	COST(min);
        for (i = 1; i <= min; i++)
          if ((md->ctypes[*eptr++] & ctype_digit) != 0) RRETURN(MATCH_NOMATCH);
        break;

        case OP_DIGIT:
 	COST(min);
        for (i = 1; i <= min; i++)
          if ((md->ctypes[*eptr++] & ctype_digit) == 0) RRETURN(MATCH_NOMATCH);
        break;

        case OP_NOT_WHITESPACE:
 	COST(min);
        for (i = 1; i <= min; i++)
          if ((md->ctypes[*eptr++] & ctype_space) != 0) RRETURN(MATCH_NOMATCH);
        break;

        case OP_WHITESPACE:
 	COST(min);
        for (i = 1; i <= min; i++)
          if ((md->ctypes[*eptr++] & ctype_space) == 0) RRETURN(MATCH_NOMATCH);
        break;

        case OP_NOT_WORDCHAR:
 	COST(min);
        for (i = 1; i <= min; i++)
          if ((md->ctypes[*eptr++] & ctype_word) != 0)
            RRETURN(MATCH_NOMATCH);
        break;

        case OP_WORDCHAR:
 	COST(min);
        for (i = 1; i <= min; i++)
          if ((md->ctypes[*eptr++] & ctype_word) == 0)
            RRETURN(MATCH_NOMATCH);
        break;

        default:
        RRETURN(PCRE_ERROR_INTERNAL);
        }
      }

    /* If min = max, continue at the same level without recursing */

    if (min == max) continue;

    /* If minimizing, we have to test the rest of the pattern before each
    subsequent match. Again, separate the UTF-8 case for speed, and also
    separate the UCP cases. */

    if (minimize)
      {
#ifdef SUPPORT_UCP
      if (prop_type >= 0)
        {
        switch(prop_type)
          {
          case PT_ANY:
          for (fi = min;; fi++) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM36);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            GETCHARINC(c, eptr);
            if (prop_fail_result) RRETURN(MATCH_NOMATCH);
            }
          /* Control never gets here */

          case PT_LAMP:
          for (fi = min;; fi++) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM37);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            GETCHARINC(c, eptr);
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if ((prop_chartype == ucp_Lu ||
                 prop_chartype == ucp_Ll ||
                 prop_chartype == ucp_Lt) == prop_fail_result)
              RRETURN(MATCH_NOMATCH);
            }
          /* Control never gets here */

          case PT_GC:
          for (fi = min;; fi++) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM38);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            GETCHARINC(c, eptr);
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if ((prop_category == prop_value) == prop_fail_result)
              RRETURN(MATCH_NOMATCH);
            }
          /* Control never gets here */

          case PT_PC:
          for (fi = min;; fi++) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM39);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            GETCHARINC(c, eptr);
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if ((prop_chartype == prop_value) == prop_fail_result)
              RRETURN(MATCH_NOMATCH);
            }
          /* Control never gets here */

          case PT_SC:
          for (fi = min;; fi++) /* PaN: OK */
            {
            RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM40);
            if (rrc != MATCH_NOMATCH) RRETURN(rrc);
            if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
            GETCHARINC(c, eptr);
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if ((prop_script == prop_value) == prop_fail_result)
              RRETURN(MATCH_NOMATCH);
            }
          /* Control never gets here */

          default:
          RRETURN(PCRE_ERROR_INTERNAL);
          }
        }

      /* Match extended Unicode sequences. We will get here only if the
      support is in the binary; otherwise a compile-time error occurs. */

      else if (ctype == OP_EXTUNI)
        {
        for (fi = min;; fi++) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM41);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          if (fi >= max || eptr >= md->end_subject) RRETURN(MATCH_NOMATCH);
          GETCHARINCTEST(c, eptr);
          prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
          if (prop_category == ucp_M) RRETURN(MATCH_NOMATCH);
          while (eptr < md->end_subject) /* PaN: Check */
            {
            int len = 1;
            if (!utf8) c = *eptr; else
              {
              GETCHARLEN(c, eptr, len);
              }
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if (prop_category != ucp_M) break;
            eptr += len;
            }
          }
        }

      else
#endif     /* SUPPORT_UCP */

#ifdef SUPPORT_UTF8
      /* UTF-8 mode */
      if (utf8)
        {
        for (fi = min;; fi++) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM42);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          if (fi >= max || eptr >= md->end_subject ||
               (ctype == OP_ANY && (ims & PCRE_DOTALL) == 0 &&
                IS_NEWLINE(eptr)))
            RRETURN(MATCH_NOMATCH);

          GETCHARINC(c, eptr);
          switch(ctype)
            {
            case OP_ANY:        /* This is the DOTALL case */
            break;

            case OP_ANYBYTE:
            break;

            case OP_ANYNL:
            switch(c)
              {
              default: RRETURN(MATCH_NOMATCH);
              case 0x000d:
              if (eptr < md->end_subject && *eptr == 0x0a) eptr++;
              break;
              case 0x000a:
              break;

              case 0x000b:
              case 0x000c:
              case 0x0085:
              case 0x2028:
              case 0x2029:
              if (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH);
              break;
              }
            break;

            case OP_NOT_HSPACE:
            switch(c)
              {
              default: break;
              case 0x09:      /* HT */
              case 0x20:      /* SPACE */
              case 0xa0:      /* NBSP */
              case 0x1680:    /* OGHAM SPACE MARK */
              case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
              case 0x2000:    /* EN QUAD */
              case 0x2001:    /* EM QUAD */
              case 0x2002:    /* EN SPACE */
              case 0x2003:    /* EM SPACE */
              case 0x2004:    /* THREE-PER-EM SPACE */
              case 0x2005:    /* FOUR-PER-EM SPACE */
              case 0x2006:    /* SIX-PER-EM SPACE */
              case 0x2007:    /* FIGURE SPACE */
              case 0x2008:    /* PUNCTUATION SPACE */
              case 0x2009:    /* THIN SPACE */
              case 0x200A:    /* HAIR SPACE */
              case 0x202f:    /* NARROW NO-BREAK SPACE */
              case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
              case 0x3000:    /* IDEOGRAPHIC SPACE */
              RRETURN(MATCH_NOMATCH);
              }
            break;

            case OP_HSPACE:
            switch(c)
              {
              default: RRETURN(MATCH_NOMATCH);
              case 0x09:      /* HT */
              case 0x20:      /* SPACE */
              case 0xa0:      /* NBSP */
              case 0x1680:    /* OGHAM SPACE MARK */
              case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
              case 0x2000:    /* EN QUAD */
              case 0x2001:    /* EM QUAD */
              case 0x2002:    /* EN SPACE */
              case 0x2003:    /* EM SPACE */
              case 0x2004:    /* THREE-PER-EM SPACE */
              case 0x2005:    /* FOUR-PER-EM SPACE */
              case 0x2006:    /* SIX-PER-EM SPACE */
              case 0x2007:    /* FIGURE SPACE */
              case 0x2008:    /* PUNCTUATION SPACE */
              case 0x2009:    /* THIN SPACE */
              case 0x200A:    /* HAIR SPACE */
              case 0x202f:    /* NARROW NO-BREAK SPACE */
              case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
              case 0x3000:    /* IDEOGRAPHIC SPACE */
              break;
              }
            break;

            case OP_NOT_VSPACE:
            switch(c)
              {
              default: break;
              case 0x0a:      /* LF */
              case 0x0b:      /* VT */
              case 0x0c:      /* FF */
              case 0x0d:      /* CR */
              case 0x85:      /* NEL */
              case 0x2028:    /* LINE SEPARATOR */
              case 0x2029:    /* PARAGRAPH SEPARATOR */
              RRETURN(MATCH_NOMATCH);
              }
            break;

            case OP_VSPACE:
            switch(c)
              {
              default: RRETURN(MATCH_NOMATCH);
              case 0x0a:      /* LF */
              case 0x0b:      /* VT */
              case 0x0c:      /* FF */
              case 0x0d:      /* CR */
              case 0x85:      /* NEL */
              case 0x2028:    /* LINE SEPARATOR */
              case 0x2029:    /* PARAGRAPH SEPARATOR */
              break;
              }
            break;

            case OP_NOT_DIGIT:
            if (c < 256 && (md->ctypes[c] & ctype_digit) != 0)
              RRETURN(MATCH_NOMATCH);
            break;

            case OP_DIGIT:
            if (c >= 256 || (md->ctypes[c] & ctype_digit) == 0)
              RRETURN(MATCH_NOMATCH);
            break;

            case OP_NOT_WHITESPACE:
            if (c < 256 && (md->ctypes[c] & ctype_space) != 0)
              RRETURN(MATCH_NOMATCH);
            break;

            case OP_WHITESPACE:
            if  (c >= 256 || (md->ctypes[c] & ctype_space) == 0)
              RRETURN(MATCH_NOMATCH);
            break;

            case OP_NOT_WORDCHAR:
            if (c < 256 && (md->ctypes[c] & ctype_word) != 0)
              RRETURN(MATCH_NOMATCH);
            break;

            case OP_WORDCHAR:
            if (c >= 256 || (md->ctypes[c] & ctype_word) == 0)
              RRETURN(MATCH_NOMATCH);
            break;

            default:
            RRETURN(PCRE_ERROR_INTERNAL);
            }
          }
        }
      else
#endif
      /* Not UTF-8 mode */
        {
        for (fi = min;; fi++) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM43);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          if (fi >= max || eptr >= md->end_subject ||
               ((ims & PCRE_DOTALL) == 0 && IS_NEWLINE(eptr)))
            RRETURN(MATCH_NOMATCH);

          c = *eptr++;
          switch(ctype)
            {
            case OP_ANY:   /* This is the DOTALL case */
            break;

            case OP_ANYBYTE:
            break;

            case OP_ANYNL:
            switch(c)
              {
              default: RRETURN(MATCH_NOMATCH);
              case 0x000d:
              if (eptr < md->end_subject && *eptr == 0x0a) eptr++;
              break;

              case 0x000a:
              break;

              case 0x000b:
              case 0x000c:
              case 0x0085:
              if (md->bsr_anycrlf) RRETURN(MATCH_NOMATCH);
              break;
              }
            break;

            case OP_NOT_HSPACE:
            switch(c)
              {
              default: break;
              case 0x09:      /* HT */
              case 0x20:      /* SPACE */
              case 0xa0:      /* NBSP */
              RRETURN(MATCH_NOMATCH);
              }
            break;

            case OP_HSPACE:
            switch(c)
              {
              default: RRETURN(MATCH_NOMATCH);
              case 0x09:      /* HT */
              case 0x20:      /* SPACE */
              case 0xa0:      /* NBSP */
              break;
              }
            break;

            case OP_NOT_VSPACE:
            switch(c)
              {
              default: break;
              case 0x0a:      /* LF */
              case 0x0b:      /* VT */
              case 0x0c:      /* FF */
              case 0x0d:      /* CR */
              case 0x85:      /* NEL */
              RRETURN(MATCH_NOMATCH);
              }
            break;

            case OP_VSPACE:
            switch(c)
              {
              default: RRETURN(MATCH_NOMATCH);
              case 0x0a:      /* LF */
              case 0x0b:      /* VT */
              case 0x0c:      /* FF */
              case 0x0d:      /* CR */
              case 0x85:      /* NEL */
              break;
              }
            break;

            case OP_NOT_DIGIT:
            if ((md->ctypes[c] & ctype_digit) != 0) RRETURN(MATCH_NOMATCH);
            break;

            case OP_DIGIT:
            if ((md->ctypes[c] & ctype_digit) == 0) RRETURN(MATCH_NOMATCH);
            break;

            case OP_NOT_WHITESPACE:
            if ((md->ctypes[c] & ctype_space) != 0) RRETURN(MATCH_NOMATCH);
            break;

            case OP_WHITESPACE:
            if  ((md->ctypes[c] & ctype_space) == 0) RRETURN(MATCH_NOMATCH);
            break;

            case OP_NOT_WORDCHAR:
            if ((md->ctypes[c] & ctype_word) != 0) RRETURN(MATCH_NOMATCH);
            break;

            case OP_WORDCHAR:
            if ((md->ctypes[c] & ctype_word) == 0) RRETURN(MATCH_NOMATCH);
            break;

            default:
            RRETURN(PCRE_ERROR_INTERNAL);
            }
          }
        }
      /* Control never gets here */
      }

    /* If maximizing, it is worth using inline code for speed, doing the type
    test once at the start (i.e. keep it out of the loop). Again, keep the
    UTF-8 and UCP stuff separate. */

    else
      {
      pp = eptr;  /* Remember where we started */

#ifdef SUPPORT_UCP
      if (prop_type >= 0)
        {
        switch(prop_type)
          {
          case PT_ANY:
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            if (prop_fail_result) break;
            eptr+= len;
	    COST_CHK(1);
            }
          break;

          case PT_LAMP:
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if ((prop_chartype == ucp_Lu ||
                 prop_chartype == ucp_Ll ||
                 prop_chartype == ucp_Lt) == prop_fail_result)
              break;
            eptr+= len;
	    COST_CHK(1);
            }
          break;

          case PT_GC:
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if ((prop_category == prop_value) == prop_fail_result)
              break;
            eptr+= len;
	    COST_CHK(1);
            }
          break;

          case PT_PC:
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if ((prop_chartype == prop_value) == prop_fail_result)
              break;
            eptr+= len;
	    COST_CHK(1);
            }
          break;

          case PT_SC:
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if ((prop_script == prop_value) == prop_fail_result)
              break;
            eptr+= len;
	    COST_CHK(1);
            }
          break;
          }

        /* eptr is now past the end of the maximum run */

        if (possessive) continue;
        for(;;) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM44);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          if (eptr-- == pp) break;        /* Stop if tried at original pos */
          if (utf8) BACKCHAR(eptr);
          }
        }

      /* Match extended Unicode sequences. We will get here only if the
      support is in the binary; otherwise a compile-time error occurs. */

      else if (ctype == OP_EXTUNI)
        {
        for (i = min; i < max; i++)
          {
          if (eptr >= md->end_subject) break;
          GETCHARINCTEST(c, eptr);
          prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
          if (prop_category == ucp_M) break;
          while (eptr < md->end_subject) 
            {
            int len = 1;
            if (!utf8) c = *eptr; else
              {
              GETCHARLEN(c, eptr, len);
              }
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if (prop_category != ucp_M) break;
            eptr += len;
	    COST_CHK(1);
            }
	    COST_CHK(1);
          }

        /* eptr is now past the end of the maximum run */

        if (possessive) continue;
        for(;;) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM45);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          if (eptr-- == pp) break;        /* Stop if tried at original pos */
          for (;;)                        /* Move back over one extended */ /* PaN: Check */
            {
            int len = 1;
            if (!utf8) c = *eptr; else
              {
              BACKCHAR(eptr);
              GETCHARLEN(c, eptr, len);
              }
            prop_category = _erts_pcre_ucp_findprop(c, &prop_chartype, &prop_script);
            if (prop_category != ucp_M) break;
            eptr--;
            }
          }
        }

      else
#endif   /* SUPPORT_UCP */

#ifdef SUPPORT_UTF8
      /* UTF-8 mode */

      if (utf8)
        {
        switch(ctype)
          {
          case OP_ANY:
          if (max < INT_MAX)
            {
            if ((ims & PCRE_DOTALL) == 0)
              {
              for (i = min; i < max; i++)
                {
                if (eptr >= md->end_subject || IS_NEWLINE(eptr)) break;
                eptr++;
                while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
		COST_CHK(1);
                }
              }
            else
              {
              for (i = min; i < max; i++)
                {
                if (eptr >= md->end_subject) break;
                eptr++;
                while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++; /* PaN: Check */
		COST_CHK(1);
                }
              }
            }

          /* Handle unlimited UTF-8 repeat */

          else
            {
            if ((ims & PCRE_DOTALL) == 0)
              {
              for (i = min; i < max; i++)
                {
                if (eptr >= md->end_subject || IS_NEWLINE(eptr)) break;
                eptr++;
                while (eptr < md->end_subject && (*eptr & 0xc0) == 0x80) eptr++;
		COST_CHK(1);
                }
              }
            else
              {
              eptr = md->end_subject;
              }
            }
          break;

          /* The byte case is the same as non-UTF8 */

          case OP_ANYBYTE:
          c = max - min;
          if (c > (unsigned int)(md->end_subject - eptr))
            c = md->end_subject - eptr;
          eptr += c;
          break;

          case OP_ANYNL:
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            if (c == 0x000d)
              {
              if (++eptr >= md->end_subject) break;
              if (*eptr == 0x000a) eptr++;
              }
            else
              {
              if (c != 0x000a &&
                  (md->bsr_anycrlf ||
                   (c != 0x000b && c != 0x000c &&
                    c != 0x0085 && c != 0x2028 && c != 0x2029)))
                break;
              eptr += len;
              }
	    COST_CHK(1);
            }
          break;

          case OP_NOT_HSPACE:
          case OP_HSPACE:
          for (i = min; i < max; i++)
            {
            BOOL gotspace;
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            switch(c)
              {
              default: gotspace = FALSE; break;
              case 0x09:      /* HT */
              case 0x20:      /* SPACE */
              case 0xa0:      /* NBSP */
              case 0x1680:    /* OGHAM SPACE MARK */
              case 0x180e:    /* MONGOLIAN VOWEL SEPARATOR */
              case 0x2000:    /* EN QUAD */
              case 0x2001:    /* EM QUAD */
              case 0x2002:    /* EN SPACE */
              case 0x2003:    /* EM SPACE */
              case 0x2004:    /* THREE-PER-EM SPACE */
              case 0x2005:    /* FOUR-PER-EM SPACE */
              case 0x2006:    /* SIX-PER-EM SPACE */
              case 0x2007:    /* FIGURE SPACE */
              case 0x2008:    /* PUNCTUATION SPACE */
              case 0x2009:    /* THIN SPACE */
              case 0x200A:    /* HAIR SPACE */
              case 0x202f:    /* NARROW NO-BREAK SPACE */
              case 0x205f:    /* MEDIUM MATHEMATICAL SPACE */
              case 0x3000:    /* IDEOGRAPHIC SPACE */
              gotspace = TRUE;
              break;
              }
            if (gotspace == (ctype == OP_NOT_HSPACE)) break;
            eptr += len;
	    COST_CHK(1);
            }
          break;

          case OP_NOT_VSPACE:
          case OP_VSPACE:
          for (i = min; i < max; i++)
            {
            BOOL gotspace;
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            switch(c)
              {
              default: gotspace = FALSE; break;
              case 0x0a:      /* LF */
              case 0x0b:      /* VT */
              case 0x0c:      /* FF */
              case 0x0d:      /* CR */
              case 0x85:      /* NEL */
              case 0x2028:    /* LINE SEPARATOR */
              case 0x2029:    /* PARAGRAPH SEPARATOR */
              gotspace = TRUE;
              break;
              }
            if (gotspace == (ctype == OP_NOT_VSPACE)) break;
            eptr += len;
	    COST_CHK(1);
            }
          break;

          case OP_NOT_DIGIT:
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            if (c < 256 && (md->ctypes[c] & ctype_digit) != 0) break;
            eptr+= len;
	    COST_CHK(1);
            }
          break;

          case OP_DIGIT:
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            if (c >= 256 ||(md->ctypes[c] & ctype_digit) == 0) break;
            eptr+= len;
	    COST_CHK(1);
            }
          break;

          case OP_NOT_WHITESPACE:
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            if (c < 256 && (md->ctypes[c] & ctype_space) != 0) break;
            eptr+= len;
	    COST_CHK(1);
            }
          break;

          case OP_WHITESPACE:
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            if (c >= 256 ||(md->ctypes[c] & ctype_space) == 0) break;
            eptr+= len;
	    COST_CHK(1);
            }
          break;

          case OP_NOT_WORDCHAR:
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            if (c < 256 && (md->ctypes[c] & ctype_word) != 0) break;
            eptr+= len;
	    COST_CHK(1);
            }
          break;

          case OP_WORDCHAR:
          for (i = min; i < max; i++)
            {
            int len = 1;
            if (eptr >= md->end_subject) break;
            GETCHARLEN(c, eptr, len);
            if (c >= 256 || (md->ctypes[c] & ctype_word) == 0) break;
            eptr+= len;
	    COST_CHK(1);
            }
          break;

          default:
          RRETURN(PCRE_ERROR_INTERNAL);
          }

        /* eptr is now past the end of the maximum run */

        if (possessive) continue;
        for(;;) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM46);
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          if (eptr-- == pp) break;        /* Stop if tried at original pos */
          BACKCHAR(eptr);
          }
        }
      else
#endif  /* SUPPORT_UTF8 */

      /* Not UTF-8 mode */
        {
        switch(ctype)
          {
          case OP_ANY:
          if ((ims & PCRE_DOTALL) == 0)
            {
            for (i = min; i < max; i++)
              {
              if (eptr >= md->end_subject || IS_NEWLINE(eptr)) break;
              eptr++;
	      COST_CHK(1);
              }
            break;
            }
          /* For DOTALL case, fall through and treat as \C */

          case OP_ANYBYTE:
          c = max - min;
          if (c > (unsigned int)(md->end_subject - eptr))
            c = md->end_subject - eptr;
          eptr += c;
          break;

          case OP_ANYNL:
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject) break;
            c = *eptr;
            if (c == 0x000d)
              {
              if (++eptr >= md->end_subject) break;
              if (*eptr == 0x000a) eptr++;
              }
            else
              {
              if (c != 0x000a &&
                  (md->bsr_anycrlf ||
                    (c != 0x000b && c != 0x000c && c != 0x0085)))
                break;
              eptr++;
              }
	    COST_CHK(1);
            }
          break;

          case OP_NOT_HSPACE:
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject) break;
            c = *eptr;
            if (c == 0x09 || c == 0x20 || c == 0xa0) break;
            eptr++;
	    COST_CHK(1);
            }
          break;

          case OP_HSPACE:
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject) break;
            c = *eptr;
            if (c != 0x09 && c != 0x20 && c != 0xa0) break;
            eptr++;
	    COST_CHK(1);
            }
          break;

          case OP_NOT_VSPACE:
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject) break;
            c = *eptr;
            if (c == 0x0a || c == 0x0b || c == 0x0c || c == 0x0d || c == 0x85)
              break;
            eptr++;
	    COST_CHK(1);
            }
          break;

          case OP_VSPACE:
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject) break;
            c = *eptr;
            if (c != 0x0a && c != 0x0b && c != 0x0c && c != 0x0d && c != 0x85)
              break;
            eptr++;
	    COST_CHK(1);
            }
          break;

          case OP_NOT_DIGIT:
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject || (md->ctypes[*eptr] & ctype_digit) != 0)
              break;
            eptr++;
	    COST_CHK(1);
            }
          break;

          case OP_DIGIT:
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject || (md->ctypes[*eptr] & ctype_digit) == 0)
              break;
            eptr++;
	    COST_CHK(1);
            }
          break;

          case OP_NOT_WHITESPACE:
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject || (md->ctypes[*eptr] & ctype_space) != 0)
              break;
            eptr++;
	    COST_CHK(1);
            }
          break;

          case OP_WHITESPACE:
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject || (md->ctypes[*eptr] & ctype_space) == 0)
              break;
            eptr++;
	    COST_CHK(1);
            }
          break;

          case OP_NOT_WORDCHAR:
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject || (md->ctypes[*eptr] & ctype_word) != 0)
              break;
            eptr++;
	    COST_CHK(1);
            }
          break;

          case OP_WORDCHAR:
          for (i = min; i < max; i++)
            {
            if (eptr >= md->end_subject || (md->ctypes[*eptr] & ctype_word) == 0)
              break;
            eptr++;
	    COST_CHK(1);
            }
          break;

          default:
          RRETURN(PCRE_ERROR_INTERNAL);
          }

        /* eptr is now past the end of the maximum run */

        if (possessive) continue;
        while (eptr >= pp) /* PaN: OK */
          {
          RMATCH(eptr, ecode, offset_top, md, ims, eptrb, 0, RM47);
          eptr--;
          if (rrc != MATCH_NOMATCH) RRETURN(rrc);
          }
        }

      /* Get here if we can't make it match with any permitted repetitions */

      RRETURN(MATCH_NOMATCH);
      }
    /* Control never gets here */

    /* There's been some horrible disaster. Arrival here can only mean there is
    something seriously wrong in the code above or the OP_xxx definitions. */

    default:
    DPRINTF(("Unknown opcode %d\n", *ecode));
    RRETURN(PCRE_ERROR_UNKNOWN_OPCODE);
    }

  /* Do not stick any code in here without much thought; it is assumed
  that "continue" in the code above comes out to here to repeat the main
  loop. */

  }             /* End of main loop */
/* Control never reaches here */


/* When compiling to use the heap rather than the stack for recursive calls to
match(), the RRETURN() macro jumps here. The number that is saved in
frame->Xwhere indicates which label we actually want to return to. */

#ifdef NO_RECURSE
#define LBL(val) case val: goto L_RM##val;
HEAP_RETURN:
switch (frame->Xwhere)
  {
  LBL( 1) LBL( 2) LBL( 3) LBL( 4) LBL( 5) LBL( 6) LBL( 7) LBL( 8)
  LBL( 9) LBL(10) LBL(11) LBL(12) LBL(13) LBL(14) LBL(15) LBL(17)
  LBL(19) LBL(24) LBL(25) LBL(26) LBL(27) LBL(29) LBL(31) LBL(33)
  LBL(35) LBL(43) LBL(47) LBL(48) LBL(49) LBL(50) LBL(51) LBL(52)
  LBL(53) LBL(54)
#ifdef SUPPORT_UTF8
  LBL(16) LBL(18) LBL(20) LBL(21) LBL(22) LBL(23) LBL(28) LBL(30)
  LBL(32) LBL(34) LBL(42) LBL(46)
#ifdef SUPPORT_UCP
  LBL(36) LBL(37) LBL(38) LBL(39) LBL(40) LBL(41) LBL(44) LBL(45)
#endif  /* SUPPORT_UCP */
#endif  /* SUPPORT_UTF8 */
  default:
  DPRINTF(("jump error in pcre match: label %d non-existent\n", frame->Xwhere));
  return PCRE_ERROR_INTERNAL;
  }
#undef LBL


#ifdef ERLANG_INTEGRATION
LOOP_COUNT_RETURN:
  /* Restore the saved register variables in the upper dummy frame, description below */
 {
   heapframe *newframe = frame;
   frame = newframe->Xprevframe;
   rrc = newframe->Xop; 
   i = newframe->Xfi;
   c = newframe->Xfc;
   utf8 = newframe->Xcur_is_word;
   minimize = newframe->Xcondition;
   possessive = newframe->Xprev_is_word;
   (erts_pcre_stack_free)(newframe);
   EDEBUGF(("LOOP_COUNT_RETURN: %d",frame->Xwhere));
   switch (frame->Xwhere) 
     {
#include "pcre_exec_loop_break_cases.inc"
     default:
       DPRINTF(("jump error in pcre match: label %d non-existent\n", frame->Xwhere));
       return PCRE_ERROR_INTERNAL;
     }
 }

LOOP_COUNT_BREAK:
  /* Save the local register variables in a dummy frame, to keep the 
   * every frame of equal size rule */
  /* 
   * Store Local                    in
   * ------------------------------ --------------
   * rrc                            Xop
   * i                              Xfi
   * c                              Xfc
   * utf8                           Xcur_is_word
   * minimize                       Xcondition
   * possessive                     Xprev_is_word
   */ 
  {   
    heapframe *newframe = (erts_pcre_stack_malloc)(sizeof(heapframe));
    newframe->Xprevframe = frame;
    newframe->Xop = rrc; 
    newframe->Xfi = i;
    newframe->Xfc = c;
    newframe->Xcur_is_word = utf8;
    newframe->Xcondition = minimize;
    newframe->Xprev_is_word = possessive;
    md->state_save = newframe;
    md->loop_limit = 0;
    EDEBUGF(("Break loop!"));
    return PCRE_ERROR_LOOP_LIMIT;
  }
#endif 

#endif  /* NO_RECURSE */
}

#ifdef ERLANG_INTEGRATION
static void free_saved_match_state(heapframe *top) {
  while (top != NULL) {
    heapframe *nxt = top->Xprevframe;
     (erts_pcre_stack_free)(top);
     top = nxt;
  }
}
#endif


/***************************************************************************
****************************************************************************
                   RECURSION IN THE match() FUNCTION

Undefine all the macros that were defined above to handle this. */

#ifdef NO_RECURSE
#undef eptr
#undef ecode
#undef mstart
#undef offset_top
#undef ims
#undef eptrb
#undef flags

#undef callpat
#undef charptr
#undef data
#undef next
#undef pp
#undef prev
#undef saved_eptr

#undef new_recursive

#undef cur_is_word
#undef condition
#undef prev_is_word

#undef original_ims

#undef ctype
#undef length
#undef max
#undef min
#undef number
#undef offset
#undef op
#undef save_capture_last
#undef save_offset1
#undef save_offset2
#undef save_offset3
#undef stacksave

#undef newptrb

#endif

/* These two are defined as macros in both cases */

#undef fc
#undef fi

/***************************************************************************
***************************************************************************/



/*************************************************
*         Execute a Regular Expression           *
*************************************************/

/* This function applies a compiled re to a subject string and picks out
portions of the string if it matches. Two elements in the vector are set for
each substring: the offsets to the start and end of the substring.

Arguments:
  argument_re     points to the compiled expression
  extra_data      points to extra data or is NULL
  subject         points to the subject string
  length          length of subject string (may contain binary zeros)
  start_offset    where to start in the subject string
  options         option bits
  offsets         points to a vector of ints to be filled in with offsets
  offsetcount     the number of elements in the vector

Returns:          > 0 => success; value is the number of elements filled in
                  = 0 => success, but offsets is not big enough
                   -1 => failed to match
                 < -1 => some kind of unexpected problem
*/
#ifdef ERLANG_INTEGRATION
typedef struct {
  int Xresetcount;
  int Xfirst_byte;
  BOOL Xfirst_byte_caseless;
  int Xreq_byte;
  int Xreq_byte2;
  unsigned long int Xims;
  BOOL Xreq_byte_caseless;
  BOOL Xusing_temporary_offsets;
  BOOL Xanchored;
  BOOL Xstartline;
  BOOL Xfirstline;
  BOOL Xutf8;
  match_data Xmatch_block;
  match_data *Xmd;
  const uschar *Xtables; /* may point to extra_data->tables, so the tables cannot be relocated
			   between restarts */
  const uschar *Xstart_bits; /* Points into study, so if studies are used, *they* 
			       cannot be relocated between restarts */
  /* The following points into the subject, so the sublect needs to stay put too */
  USPTR Xstart_match;
  USPTR Xend_subject;
  USPTR Xreq_byte_ptr;
  /* We'll handle internal studies and re's although this will not happen 
     in the erlang emulator in current implementation */
  pcre_study_data Xinternal_study;
  const pcre_study_data *Xstudy;

  real_pcre Xinternal_re;
  const real_pcre *Xexternal_re;
  const real_pcre *Xre;
  /* Original function parameters that need be saved */
  int Xstart_offset;
  int Xoffsetcount;
  int *Xoffsets;
} PcreExecContext;
#endif  
  
PCRE_EXP_DEFN int
erts_pcre_exec(const pcre *argument_re, const pcre_extra *extra_data,
  PCRE_SPTR subject, int length, int start_offset, int options, int *offsets,
  int offsetcount)
{
#ifndef ERLANG_INTEGRATION
int rc, resetcount, ocount;
int first_byte = -1;
int req_byte = -1;
int req_byte2 = -1;
int newline;
unsigned long int ims;
BOOL using_temporary_offsets = FALSE;
BOOL anchored;
BOOL startline;
BOOL firstline;
BOOL first_byte_caseless = FALSE;
BOOL req_byte_caseless = FALSE;
BOOL utf8;
match_data match_block;
match_data *md = &match_block;
const uschar *tables;
const uschar *start_bits = NULL;
USPTR start_match = (USPTR)subject + start_offset;
USPTR end_subject;
USPTR req_byte_ptr = start_match - 1;

pcre_study_data internal_study;
const pcre_study_data *study;

real_pcre internal_re;
const real_pcre *external_re = (const real_pcre *)argument_re;
const real_pcre *re = external_re;

#else

/* "local" variables in faked stackframe instead */
#define resetcount (exec_context->Xresetcount)
#define req_byte2 (exec_context->Xreq_byte2) 
#define using_temporary_offsets (exec_context->Xusing_temporary_offsets)
#define anchored (exec_context->Xanchored)
#define startline (exec_context->Xstartline)
#define firstline (exec_context->Xfirstline)
#define first_byte_caseless (exec_context->Xfirst_byte_caseless)
#define req_byte_caseless (exec_context->Xreq_byte_caseless)
#define match_block (exec_context->Xmatch_block)
#define md (exec_context->Xmd)
#define start_match  (exec_context->Xstart_match)
#define req_byte_ptr (exec_context->Xreq_byte_ptr)
#define internal_study (exec_context->Xinternal_study)
#define study (exec_context->Xstudy)
#define internal_re (exec_context->Xinternal_re)
#define external_re (exec_context->Xexternal_re)
#define re (exec_context->Xre)
#define ims (exec_context->Xims)

#define SWAPIN() do {				\
  utf8 = exec_context->Xutf8;			\
  first_byte = exec_context->Xfirst_byte;	\
  tables = exec_context->Xtables;		\
  start_bits = exec_context->Xstart_bits;	\
  end_subject = exec_context->Xend_subject;	\
  req_byte = exec_context->Xreq_byte;		\
  start_offset = exec_context->Xstart_offset;   \
  offsetcount = exec_context->Xoffsetcount;     \
  offsets = exec_context->Xoffsets;             \
} while (0)

#define SWAPOUT() do {				\
  exec_context->Xutf8 = utf8;			\
  exec_context->Xfirst_byte = first_byte;	\
  exec_context->Xtables = tables;		\
  exec_context->Xstart_bits = start_bits;	\
  exec_context->Xend_subject = end_subject;	\
  exec_context->Xreq_byte = req_byte;		\
  exec_context->Xstart_offset = start_offset;   \
  exec_context->Xoffsetcount = offsetcount;     \
  exec_context->Xoffsets = offsets;             \
} while (0)

PcreExecContext *exec_context;
PcreExecContext internal_context;

int rc, ocount;
int newline;

/* special variables follow, swapped in and out */ 
BOOL utf8; 
int first_byte;
const uschar *tables;
const uschar *start_bits;
USPTR end_subject;
int req_byte;
/* End special swapped variables */

 if (extra_data != NULL && 
     (extra_data->flags & PCRE_EXTRA_LOOP_LIMIT) && 
     *(extra_data->restart_data) != NULL) {
     /* we are restarting, every initialization is skipped and we jump directly into the loop */
   exec_context = (PcreExecContext *) *(extra_data->restart_data);
   SWAPIN();
   goto RESTART_INTERRUPTED;
 } else {
   if (extra_data != NULL && 
       (extra_data->flags & PCRE_EXTRA_LOOP_LIMIT)) {
     exec_context = (PcreExecContext *) (erts_pcre_malloc)(sizeof(PcreExecContext));
     *(extra_data->restart_data) = (void *) exec_context; 
     /* need freeing by special routine from client */
   } else {
     exec_context = &internal_context;
   }
   
   /* OK, no restart here, initialize variables instead */
   first_byte = -1;
   req_byte = -1;
   req_byte2 = -1;
   using_temporary_offsets = FALSE;
   first_byte_caseless = FALSE;
   req_byte_caseless = FALSE;
   md = &match_block;
   start_bits = NULL;
   start_match = (USPTR)subject + start_offset;
   req_byte_ptr = start_match - 1;
   external_re = (const real_pcre *)argument_re;
   re = external_re;

   md->state_save = NULL; 

}

#endif /* ERLANG_INTEGRATION */


/* Plausibility checks */

if ((options & ~PUBLIC_EXEC_OPTIONS) != 0) return PCRE_ERROR_BADOPTION;
if (re == NULL || subject == NULL ||
   (offsets == NULL && offsetcount > 0)) return PCRE_ERROR_NULL;
if (offsetcount < 0) return PCRE_ERROR_BADCOUNT;

/* Fish out the optional data from the extra_data structure, first setting
the default values. */

study = NULL;
md->match_limit = MATCH_LIMIT;
md->match_limit_recursion = MATCH_LIMIT_RECURSION;
md->callout_data = NULL;

/* The table pointer is always in native byte order. */

tables = external_re->tables;

if (extra_data != NULL)
  {
  register unsigned int flags = extra_data->flags;
  if ((flags & PCRE_EXTRA_STUDY_DATA) != 0)
    study = (const pcre_study_data *)extra_data->study_data;
  if ((flags & PCRE_EXTRA_MATCH_LIMIT) != 0)
    md->match_limit = extra_data->match_limit;
  if ((flags & PCRE_EXTRA_MATCH_LIMIT_RECURSION) != 0)
    md->match_limit_recursion = extra_data->match_limit_recursion;
  if ((flags & PCRE_EXTRA_CALLOUT_DATA) != 0)
    md->callout_data = extra_data->callout_data;
  if ((flags & PCRE_EXTRA_TABLES) != 0) tables = extra_data->tables;
#ifdef ERLANG_INTEGRATION
  if ((flags & PCRE_EXTRA_LOOP_LIMIT) != 0) 
    {
    md->loop_limit = extra_data->loop_limit;
    }
#endif
  }

/* If the exec call supplied NULL for tables, use the inbuilt ones. This
is a feature that makes it possible to save compiled regex and re-use them
in other programs later. */

if (tables == NULL) tables = _erts_pcre_default_tables;

/* Check that the first field in the block is the magic number. If it is not,
test for a regex that was compiled on a host of opposite endianness. If this is
the case, flipped values are put in internal_re and internal_study if there was
study data too. */

if (re->magic_number != MAGIC_NUMBER)
  {
  re = _erts_pcre_try_flipped(re, &internal_re, study, &internal_study);
  if (re == NULL) return PCRE_ERROR_BADMAGIC;
  if (study != NULL) study = &internal_study;
  }

/* Set up other data */

anchored = ((re->options | options) & PCRE_ANCHORED) != 0;
startline = (re->flags & PCRE_STARTLINE) != 0;
firstline = (re->options & PCRE_FIRSTLINE) != 0;

/* The code starts after the real_pcre block and the capture name table. */

md->start_code = (const uschar *)external_re + re->name_table_offset +
  re->name_count * re->name_entry_size;

md->start_subject = (USPTR)subject;
md->start_offset = start_offset;
md->end_subject = md->start_subject + length;
end_subject = md->end_subject;

md->endonly = (re->options & PCRE_DOLLAR_ENDONLY) != 0;
utf8 = md->utf8 = (re->options & PCRE_UTF8) != 0;

md->notbol = (options & PCRE_NOTBOL) != 0;
md->noteol = (options & PCRE_NOTEOL) != 0;
md->notempty = (options & PCRE_NOTEMPTY) != 0;
md->partial = (options & PCRE_PARTIAL) != 0;
md->hitend = FALSE;

md->recursive = NULL;                   /* No recursion at top level */

md->lcc = tables + lcc_offset;
md->ctypes = tables + ctypes_offset;

/* Handle different \R options. */

switch (options & (PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE))
  {
  case 0:
  if ((re->options & (PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE)) != 0)
    md->bsr_anycrlf = (re->options & PCRE_BSR_ANYCRLF) != 0;
  else
#ifdef BSR_ANYCRLF
  md->bsr_anycrlf = TRUE;
#else
  md->bsr_anycrlf = FALSE;
#endif
  break;

  case PCRE_BSR_ANYCRLF:
  md->bsr_anycrlf = TRUE;
  break;

  case PCRE_BSR_UNICODE:
  md->bsr_anycrlf = FALSE;
  break;

  default: return PCRE_ERROR_BADNEWLINE;
  }

/* Handle different types of newline. The three bits give eight cases. If
nothing is set at run time, whatever was used at compile time applies. */

switch ((((options & PCRE_NEWLINE_BITS) == 0)? re->options :
        (pcre_uint32)options) & PCRE_NEWLINE_BITS)
  {
  case 0: newline = NEWLINE; break;   /* Compile-time default */
  case PCRE_NEWLINE_CR: newline = '\r'; break;
  case PCRE_NEWLINE_LF: newline = '\n'; break;
  case PCRE_NEWLINE_CR+
       PCRE_NEWLINE_LF: newline = ('\r' << 8) | '\n'; break;
  case PCRE_NEWLINE_ANY: newline = -1; break;
  case PCRE_NEWLINE_ANYCRLF: newline = -2; break;
  default: return PCRE_ERROR_BADNEWLINE;
  }

if (newline == -2)
  {
  md->nltype = NLTYPE_ANYCRLF;
  }
else if (newline < 0)
  {
  md->nltype = NLTYPE_ANY;
  }
else
  {
  md->nltype = NLTYPE_FIXED;
  if (newline > 255)
    {
    md->nllen = 2;
    md->nl[0] = (newline >> 8) & 255;
    md->nl[1] = newline & 255;
    }
  else
    {
    md->nllen = 1;
    md->nl[0] = newline;
    }
  }

/* Partial matching is supported only for a restricted set of regexes at the
moment. */

if (md->partial && (re->flags & PCRE_NOPARTIAL) != 0)
  return PCRE_ERROR_BADPARTIAL;

/* Check a UTF-8 string if required. Unfortunately there's no way of passing
back the character offset. */

#ifdef SUPPORT_UTF8
if (utf8 && (options & PCRE_NO_UTF8_CHECK) == 0)
  {
  if (_erts_pcre_valid_utf8((uschar *)subject, length) >= 0)
    return PCRE_ERROR_BADUTF8;
  if (start_offset > 0 && start_offset < length)
    {
    int tb = ((uschar *)subject)[start_offset];
    if (tb > 127)
      {
      tb &= 0xc0;
      if (tb != 0 && tb != 0xc0) return PCRE_ERROR_BADUTF8_OFFSET;
      }
    }
  }
#endif

/* The ims options can vary during the matching as a result of the presence
of (?ims) items in the pattern. They are kept in a local variable so that
restoring at the exit of a group is easy. */

ims = re->options & (PCRE_CASELESS|PCRE_MULTILINE|PCRE_DOTALL);

/* If the expression has got more back references than the offsets supplied can
hold, we get a temporary chunk of working store to use during the matching.
Otherwise, we can use the vector supplied, rounding down its size to a multiple
of 3. */

ocount = offsetcount - (offsetcount % 3);

if (re->top_backref > 0 && re->top_backref >= ocount/3)
  {
  ocount = re->top_backref * 3 + 3;
  md->offset_vector = (int *)(erts_pcre_malloc)(ocount * sizeof(int));
  if (md->offset_vector == NULL) return PCRE_ERROR_NOMEMORY;
  using_temporary_offsets = TRUE;
  DPRINTF(("Got memory to hold back references\n"));
  }
else md->offset_vector = offsets;

md->offset_end = ocount;
md->offset_max = (2*ocount)/3;
md->offset_overflow = FALSE;
md->capture_last = -1;

/* Compute the minimum number of offsets that we need to reset each time. Doing
this makes a huge difference to execution time when there aren't many brackets
in the pattern. */

resetcount = 2 + re->top_bracket * 2;
if (resetcount > offsetcount) resetcount = ocount;

/* Reset the working variable associated with each extraction. These should
never be used unless previously set, but they get saved and restored, and so we
initialize them to avoid reading uninitialized locations. */

if (md->offset_vector != NULL)
  {
  register int *iptr = md->offset_vector + ocount;
  register int *iend = iptr - resetcount/2 + 1;
  while (--iptr >= iend) *iptr = -1;
  }

/* Set up the first character to match, if available. The first_byte value is
never set for an anchored regular expression, but the anchoring may be forced
at run time, so we have to test for anchoring. The first char may be unset for
an unanchored pattern, of course. If there's no first char and the pattern was
studied, there may be a bitmap of possible first characters. */

if (!anchored)
  {
  if ((re->flags & PCRE_FIRSTSET) != 0)
    {
    first_byte = re->first_byte & 255;
    if ((first_byte_caseless = ((re->first_byte & REQ_CASELESS) != 0)) == TRUE)
      first_byte = md->lcc[first_byte];
    }
  else
    if (!startline && study != NULL &&
      (study->options & PCRE_STUDY_MAPPED) != 0)
        start_bits = study->start_bits;
  }

/* For anchored or unanchored matches, there may be a "last known required
character" set. */

if ((re->flags & PCRE_REQCHSET) != 0)
  {
  req_byte = re->req_byte & 255;
  req_byte_caseless = (re->req_byte & REQ_CASELESS) != 0;
  req_byte2 = (tables + fcc_offset)[req_byte];  /* case flipped */
  }


/* ==========================================================================*/

/* Loop for handling unanchored repeated matching attempts; for anchored regexs
the loop runs just once. */

for(;;)
  {
  USPTR save_end_subject = end_subject;
  USPTR new_start_match;

  /* Reset the maximum number of extractions we might see. */

  if (md->offset_vector != NULL)
    {
    register int *iptr = md->offset_vector;
    register int *iend = iptr + resetcount;
    while (iptr < iend) *iptr++ = -1;
    }

  /* Advance to a unique first char if possible. If firstline is TRUE, the
  start of the match is constrained to the first line of a multiline string.
  That is, the match must be before or at the first newline. Implement this by
  temporarily adjusting end_subject so that we stop scanning at a newline. If
  the match fails at the newline, later code breaks this loop. */

  if (firstline)
    {
    USPTR t = start_match;
    while (t < md->end_subject && !IS_NEWLINE(t)) t++;
    end_subject = t;
    }

  /* Now test for a unique first byte */

  if (first_byte >= 0)
    {
    if (first_byte_caseless)
      while (start_match < end_subject &&
             md->lcc[*start_match] != first_byte)
        { NEXTCHAR(start_match,end_subject); }
    else
      while (start_match < end_subject && *start_match != first_byte)
        { NEXTCHAR(start_match,end_subject); }
    }

  /* Or to just after a linebreak for a multiline match if possible */

  else if (startline)
    {
    if (start_match > md->start_subject + start_offset)
      {
      while (start_match <= end_subject && !WAS_NEWLINE(start_match))
        { NEXTCHAR(start_match,end_subject); }

      /* If we have just passed a CR and the newline option is ANY or ANYCRLF,
      and we are now at a LF, advance the match position by one more character.
      */

      if (start_match <= end_subject && start_match[-1] == '\r' &&
           (md->nltype == NLTYPE_ANY || md->nltype == NLTYPE_ANYCRLF) &&
           start_match < end_subject &&
           *start_match == '\n')
        start_match++;
      }
    }

  /* Or to a non-unique first char after study */

  else if (start_bits != NULL)
    {
    while (start_match < end_subject)
      {
      register unsigned int c = *start_match;
      if ((start_bits[c/8] & (1 << (c&7))) == 0)
        { NEXTCHAR(start_match,end_subject); }
#ifdef ERLANG_INTEGRATION
      else {
	if ((extra_data->flags & PCRE_EXTRA_LOOP_LIMIT) != 0) 
	  {
	  *extra_data->loop_counter_return = 
	    (extra_data->loop_limit - md->loop_limit);
          }
        break;
      }
#else
      else break;
#endif
      }
    }

  /* Restore fudged end_subject */

  end_subject = save_end_subject;

#ifdef DEBUG  /* Sigh. Some compilers never learn. */
  printf(">>>> Match against: ");
  pchars(start_match, end_subject - start_match, TRUE, md);
  printf("\n");
#endif

  /* If req_byte is set, we know that that character must appear in the subject
  for the match to succeed. If the first character is set, req_byte must be
  later in the subject; otherwise the test starts at the match point. This
  optimization can save a huge amount of backtracking in patterns with nested
  unlimited repeats that aren't going to match. Writing separate code for
  cased/caseless versions makes it go faster, as does using an autoincrement
  and backing off on a match.

  HOWEVER: when the subject string is very, very long, searching to its end can
  take a long time, and give bad performance on quite ordinary patterns. This
  showed up when somebody was matching something like /^\d+C/ on a 32-megabyte
  string... so we don't do this when the string is sufficiently long.

  ALSO: this processing is disabled when partial matching is requested.
  */

  if (req_byte >= 0 &&
      end_subject - start_match < REQ_BYTE_MAX &&
      !md->partial)
    {
    register USPTR p = start_match + ((first_byte >= 0)? 1 : 0);

    /* We don't need to repeat the search if we haven't yet reached the
    place we found it at last time. */

    if (p > req_byte_ptr)
      {
      if (req_byte_caseless)
        {
        while (p < end_subject)
          {
          register int pp = *p++;
          if (pp == req_byte || pp == req_byte2) { p--; break; }
          }
        }
      else
        {
        while (p < end_subject)
          {
          if (*p++ == req_byte) { p--; break; }
          }
        }

      /* If we can't find the required character, break the matching loop,
      forcing a match failure. */

      if (p >= end_subject)
        {
        rc = MATCH_NOMATCH;
#ifdef ERLANG_INTEGRATION
	if ((extra_data->flags & PCRE_EXTRA_LOOP_LIMIT) != 0) 
	  {
	  *extra_data->loop_counter_return = 
	    (extra_data->loop_limit - md->loop_limit);
          }
#endif
        break;
        }

      /* If we have found the required character, save the point where we
      found it, so that we don't search again next time round the loop if
      the start hasn't passed this character yet. */

      req_byte_ptr = p;
      }
    }

  /* OK, we can now run the match. */

  md->start_match_ptr = start_match;
  md->match_call_count = 0;
  EDEBUGF(("Calling match..."));
  rc = match(start_match, md->start_code, start_match, 2, md, ims, NULL, 0, 0);
#ifdef ERLANG_INTEGRATION
  if ((extra_data->flags & PCRE_EXTRA_LOOP_LIMIT) != 0) 
    {
    *extra_data->loop_counter_return = 
       (extra_data->loop_limit - md->loop_limit);
    }
  SWAPOUT();
  while(rc == PCRE_ERROR_LOOP_LIMIT) {
      EDEBUGF(("Loop limit break detected"));
      return PCRE_ERROR_LOOP_LIMIT;
  RESTART_INTERRUPTED:
      md->loop_limit = extra_data->loop_limit;
      rc = match(NULL,NULL,NULL,0,md,0,NULL,0,0);
      *extra_data->loop_counter_return = 
	  (extra_data->loop_limit - md->loop_limit);
  }
  md->state_save = NULL; /* So that next call to free_saved... does not crash */
#endif

  switch(rc)
    {
    /* NOMATCH and PRUNE advance by one character. THEN at this level acts
    exactly like PRUNE. */

    case MATCH_NOMATCH:
    case MATCH_PRUNE:
    case MATCH_THEN:
    new_start_match = start_match + 1;
#ifdef SUPPORT_UTF8
    if (utf8)
      while(new_start_match < end_subject && (*new_start_match & 0xc0) == 0x80)
        new_start_match++;
#endif
    break;

    /* SKIP passes back the next starting point explicitly. */

    case MATCH_SKIP:
    new_start_match = md->start_match_ptr;
    break;

    /* COMMIT disables the bumpalong, but otherwise behaves as NOMATCH. */

    case MATCH_COMMIT:
    rc = MATCH_NOMATCH;
    goto ENDLOOP;

    /* Any other return is some kind of error. */

    default:
    goto ENDLOOP;
    }

  /* Control reaches here for the various types of "no match at this point"
  result. Reset the code to MATCH_NOMATCH for subsequent checking. */

  rc = MATCH_NOMATCH;

  /* If PCRE_FIRSTLINE is set, the match must happen before or at the first
  newline in the subject (though it may continue over the newline). Therefore,
  if we have just failed to match, starting at a newline, do not continue. */

  if (firstline && IS_NEWLINE(start_match)) break;

  /* Advance to new matching position */

  start_match = new_start_match;

  /* Break the loop if the pattern is anchored or if we have passed the end of
  the subject. */

  if (anchored || start_match > end_subject) break;

  /* If we have just passed a CR and we are now at a LF, and the pattern does
  not contain any explicit matches for \r or \n, and the newline option is CRLF
  or ANY or ANYCRLF, advance the match position by one more character. */

  if (start_match[-1] == '\r' &&
      start_match < end_subject &&
      *start_match == '\n' &&
      (re->flags & PCRE_HASCRORLF) == 0 &&
        (md->nltype == NLTYPE_ANY ||
         md->nltype == NLTYPE_ANYCRLF ||
         md->nllen == 2))
    start_match++;

  }   /* End of for(;;) "bumpalong" loop */

/* ==========================================================================*/

/* We reach here when rc is not MATCH_NOMATCH, or if one of the stopping
conditions is true:

(1) The pattern is anchored or the match was failed by (*COMMIT);

(2) We are past the end of the subject;

(3) PCRE_FIRSTLINE is set and we have failed to match at a newline, because
    this option requests that a match occur at or before the first newline in
    the subject.

When we have a match and the offset vector is big enough to deal with any
backreferences, captured substring offsets will already be set up. In the case
where we had to get some local store to hold offsets for backreference
processing, copy those that we can. In this case there need not be overflow if
certain parts of the pattern were not used, even though there are more
capturing parentheses than vector slots. */

ENDLOOP:

if (rc == MATCH_MATCH)
  {
  if (using_temporary_offsets)
    {
    if (offsetcount >= 4)
      {
      memcpy(offsets + 2, md->offset_vector + 2,
        (offsetcount - 2) * sizeof(int));
      DPRINTF(("Copied offsets from temporary memory\n"));
      }
    if (md->end_offset_top > offsetcount) md->offset_overflow = TRUE;
    DPRINTF(("Freeing temporary memory\n"));
#ifdef ERLANG_INTEGRATION
    if (extra_data == NULL || 
	!(extra_data->flags & PCRE_EXTRA_LOOP_LIMIT)) {
	(erts_pcre_free)(md->offset_vector);
    }
#else
	(erts_pcre_free)(md->offset_vector);
#endif
    }

  /* Set the return code to the number of captured strings, or 0 if there are
  too many to fit into the vector. */

  rc = md->offset_overflow? 0 : md->end_offset_top/2;

  /* If there is space, set up the whole thing as substring 0. The value of
  md->start_match_ptr might be modified if \K was encountered on the success
  matching path. */

  if (offsetcount < 2) rc = 0; else
    {
    offsets[0] = md->start_match_ptr - md->start_subject;
    offsets[1] = md->end_match_ptr - md->start_subject;
    }

  DPRINTF((">>>> returning %d\n", rc));
  return rc;
  }

/* Control gets here if there has been an error, or if the overall match
attempt has failed at all permitted starting positions. */

if (using_temporary_offsets)
  {
  DPRINTF(("Freeing temporary memory\n"));
  (erts_pcre_free)(md->offset_vector);
  }

if (rc != MATCH_NOMATCH)
  {
  DPRINTF((">>>> error: returning %d\n", rc));
  return rc;
  }
else if (md->partial && md->hitend)
  {
  DPRINTF((">>>> returning PCRE_ERROR_PARTIAL\n"));
  return PCRE_ERROR_PARTIAL;
  }
else
  {
  DPRINTF((">>>> returning PCRE_ERROR_NOMATCH\n"));
  return PCRE_ERROR_NOMATCH;
  }
}
#ifdef ERLANG_INTEGRATION
#undef resetcount 
#undef req_byte2 
#undef using_temporary_offsets 
#undef anchored 
#undef startline 
#undef firstline 
#undef first_byte_caseless 
#undef req_byte_caseless 
#undef match_block 
#undef md 
#undef start_match  
#undef req_byte_ptr 
#undef internal_study 
#undef study 
#undef internal_re 
#undef external_re 
#undef re 
#undef ims 

void erts_pcre_free_restart_data(void *restart_data) {
  PcreExecContext *top = (PcreExecContext *) restart_data;
  /* We might be done, or we might not, so there might be some saved match_states here */
  if (top != NULL) {
    match_data *md = top->Xmd;
    if (top->Xusing_temporary_offsets && md->offset_vector != NULL) {
	(erts_pcre_free)(md->offset_vector);
    }
    free_saved_match_state(top->Xmd->state_save);
    (erts_pcre_free)(top);
  }
}
#endif

/* End of pcre_exec.c */