aboutsummaryrefslogtreecommitdiffstats
path: root/erts/lib_src/common/erl_printf_format.c
blob: fd25cce7ed75fb42acd31653ff0760622a41970a (plain) (blame)
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
/*
 * %CopyrightBegin%
 * 
 * Copyright Ericsson AB 2005-2012. All Rights Reserved.
 * 
 * The contents of this file are subject to the Erlang Public License,
 * Version 1.1, (the "License"); you may not use this file except in
 * compliance with the License. You should have received a copy of the
 * Erlang Public License along with this software. If not, it can be
 * retrieved online at http://www.erlang.org/.
 * 
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 * 
 * %CopyrightEnd%
 */

/*
 * fmt:
 *    '%' <flag>* [ <width> [.<precision>]][<length>]<conversion>
 *
 *  flag: # | O | - | <sp> | + | ' | I
 *  width:      [0-9]+ | '*' 
 *  precision:  [0-9]+ | '*' 
 *  length: hh | h | l | ll | L | j | t | b<sz>
 *  conversion: d,i | o,u,x,X | e,E | f,F | g,G | a,A | c | s | T | R |
 *              p | n | %
 *  sz: 8 | 16 | 32 | 64 | p | e
 */

/* Without this, variable argument lists break on VxWorks */
#ifdef VXWORKS
#include <vxWorks.h>
#endif

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

#ifdef __WIN32__
#undef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif

#include <ctype.h>
#include <string.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include "erl_errno.h"
#include <limits.h>
#include "erl_printf.h"
#include "erl_printf_format.h"

#ifdef DEBUG
#include <assert.h>
#define ASSERT(X) assert(X)
#else
#define ASSERT(X) 
#endif

#ifdef __WIN32__
#define long_long		LONGLONG
#define signed_long_long	LONGLONG
#define unsigned_long_long	ULONGLONG
#undef SIZEOF_LONG_LONG
#define SIZEOF_LONG_LONG 8
#else
#if SIZEOF_LONG_LONG
#define long_long		long long
#define signed_long_long	signed long long
#define unsigned_long_long	unsigned long long
#endif
#endif

#ifndef ERTS_SIZEOF_ETERM
#  ifdef HALFWORD_HEAP_EMULATOR
#    if SIZEOF_VOID_P == 8
#      define ERTS_SIZEOF_ETERM 4
#    else
#      error "HALFWORD_HEAP_EMULATOR only allowed on 64-bit architecture"
#    endif
#  else
#    define ERTS_SIZEOF_ETERM SIZEOF_VOID_P
#  endif
#endif

#if defined(__GNUC__)
#  undef inline
#  define inline __inline__
#elif defined(__WIN32__)
#  undef inline
#  define inline __forceinline
#else
#  ifndef inline
#    define inline
#  endif
#endif

#define FMTC_d    0x0000
#define FMTC_R    0x0001
#define FMTC_o    0x0002
#define FMTC_u    0x0003
#define FMTC_x    0x0004
#define FMTC_X    0x0005
#define FMTC_e    0x0006
#define FMTC_E    0x0007
#define FMTC_f    0x0008
#define FMTC_T    0x0009
#define FMTC_g    0x000a
#define FMTC_G    0x000b
#define FMTC_c    0x000c
#define FMTC_s    0x000d
#define FMTC_p    0x000e
#define FMTC_n    0x000f
#define FMTC_MASK 0x000f

#define FMTL_no   0x0000
#define FMTL_hh   0x0010
#define FMTL_h    0x0020
#define FMTL_l    0x0030
#define FMTL_ll   0x0040
#define FMTL_L    0x0050
#define FMTL_j    0x0060
#define FMTL_t    0x0070
#define FMTL_MASK 0x00f0

#define FMTF_alt  0x0100    /* # alterlate form ie 0x */
#define FMTF_pad  0x0200    /* 0 zero pad */
#define FMTF_adj  0x0400    /* left adjust */
#define FMTF_blk  0x0800    /* add blank */
#define FMTF_sgn  0x1000    /* add sign */
#define FMTF_cnv  0x2000    /* decimal conversion */
#define FMTF_cnV  0x4000    /* alternate decimal conversion */
#define FMTF_MASK 0x7f00


static char zeros[]  = "00000000000000000000000000000000";
static char blanks[] = "                                ";
static char hex[] = "0123456789abcdef";
static char heX[] = "0123456789ABCDEF";

#define FMT(fn,arg,buf,len,count) do { \
    int res__ = (fn)((arg),(buf),(len)); \
    if (res__ < 0) \
	return res__; \
    (count) += (len); \
 } while(0)

#define FILL(fn,arg,cs,len, count) do { \
    int __i = (len); \
    while(__i >= sizeof(cs)-1) { \
        FMT((fn),(arg),(cs),sizeof(cs)-1,(count)); \
        __i -= sizeof(cs)-1; \
    } \
    if (__i) FMT((fn),(arg),(cs),__i,(count)); \
 } while(0)

#define BLANKS(fn,arg,n,count) FILL((fn),(arg),blanks,(n),count)
#define ZEROS(fn,arg,n,count)  FILL((fn),(arg),zeros,(n),count)

#define SIGN(X) ((X) > 0 ? 1 : ((X) < 0 ? -1 : 0)) 
#define USIGN(X) ((X) == 0 ? 0 : 1)

int (*erts_printf_eterm_func)(fmtfn_t, void*, unsigned long, long, unsigned long*) = NULL;

static int
noop_fn(void *vfp, char* buf, size_t len)
{
    return 0;
}

static int fmt_fld(fmtfn_t fn,void* arg,
		   char* wbuf, int w, int sign,
		   int width,int precision,int fmt,int* count)
{
    char prefix[8];
    char* pp = prefix;
    int pw   = 0;
    int len;

    /* format the prefix */
    if ((sign || (fmt & (FMTF_sgn|FMTF_blk)))
	&& (fmt & FMTC_MASK) == FMTC_d) {
	if (sign < 0)
	    *pp++ = '-';
	else if ((fmt & FMTF_sgn))
	    *pp++ = '+';
	else if (fmt & FMTF_blk)
	    *pp++ = ' ';
    }

    if ((fmt & FMTF_alt)) {
	switch((fmt & FMTC_MASK)) {
	case FMTC_X: *pp++ = '0'; *pp++ = 'X'; break;
	case FMTC_x: *pp++ = '0'; *pp++ = 'x'; break;
	case FMTC_o: *pp++ = '0'; if (precision>1) precision--; break;
	}
    }

    pw = pp-prefix;
    len = ((w < precision) ? precision : w) + pw;

    if (fmt & FMTF_adj) { /* left adjust */
	if (pw)
	    FMT(fn,arg,prefix,pw,*count);
	if (w < precision)
	    ZEROS(fn,arg,precision-w,*count);
	FMT(fn,arg, wbuf, w, *count);
	if (len < width)
	    BLANKS(fn,arg,width-len,*count);
    }
    else if ((fmt & FMTF_pad) && (precision<0)) { /* pad zeros */
	if (pw)
	    FMT(fn,arg, prefix, pw, *count);
	if (w < precision)
	    ZEROS(fn, arg, precision-w, *count);
	if (len < width)
	    ZEROS(fn,arg,width-len,*count);
	FMT(fn,arg,wbuf,w,*count);
    }
    else {
	if (len < width)
	    BLANKS(fn,arg,width-len,*count);
	if (pw)
	    FMT(fn,arg,prefix,pw,*count);
	if (w < precision)
	    ZEROS(fn,arg,precision-w,*count);
	FMT(fn,arg,wbuf,w,*count);
    }
    return 0;
}

static int fmt_long(fmtfn_t fn,void* arg,int sign,unsigned long uval,
		    int width,int precision,int fmt,int* count)
{
    char buf[32];
    int base = 10;
    int w    = 0;
    char* dc = hex;
    char* p = buf+sizeof(buf);

    switch(fmt & FMTC_MASK) {
    case FMTC_d:
    case FMTC_u:
	break;
    case FMTC_o: 
	base = 8;
	break;
    case FMTC_X:
	dc = heX;
    case FMTC_x:
	base = 16;
	break;
    default: 
	return -EINVAL;
    }

    /* format the unsigned value */
    if (!sign && precision) {
	*--p = '0';
	w++;
    }
    else {
	while(uval) {
	    *--p = dc[(uval % base)];
	    uval /= base;
	    w++;
	}
    }
    return fmt_fld(fn, arg, p, w, sign, width, precision, fmt, count);
}

#if SIZEOF_LONG_LONG

static inline int
do_div(unsigned_long_long *n, unsigned_long_long base)
{
    unsigned_long_long q = *n/base;
    int mod = (int) (*n - q*base);
    *n = q;
    return mod;
}

static int fmt_long_long(fmtfn_t fn,void* arg,int sign,
			 unsigned_long_long uval,
			 int width,int precision,int fmt,int* count)
{
    char buf[32];
    int base = 10;
    int w    = 0;
    char* dc = hex;
    char* p = buf+sizeof(buf);

    switch(fmt & FMTC_MASK) {
    case FMTC_d:
    case FMTC_u:
	break;
    case FMTC_o: 
	base = 8;
	break;
    case FMTC_X:
	dc = heX;
    case FMTC_x:
	base = 16;
	break;
    default: 
	return -EINVAL;
    }

    /* format the unsigned value */
    if (!sign && precision) {
	*--p = '0';
	w++;
    }
    else {
	while(uval) {
	    int m = do_div(&uval,base);
	    *--p = dc[m];
	    w++;
	}
    }
    return fmt_fld(fn, arg, p, w, sign, width, precision, fmt, count);
}

#endif /* #if SIZEOF_LONG_LONG */

static int fmt_double(fmtfn_t fn,void*arg,double val,
		      int width, int precision, int fmt,int* count)
{
    int res;
    int fi = 0;
    char format_str[7];
    char sbuf[32];
    char *bufp;
    double dexp;
    int exp;
    size_t max_size = 1;
    size_t size;
    int new_fmt = fmt;
    int fpe_was_unmasked;

    fpe_was_unmasked = erts_printf_block_fpe ? (*erts_printf_block_fpe)() : 0;

    if (val < 0.0)
	dexp = log10(-val);
    else if (val == 0.0)
	dexp = 0.0;
    else
	dexp = log10(val);
    exp = (int) dexp;

    new_fmt &= ~FMTF_sgn;
    new_fmt &= ~FMTF_blk;

    format_str[fi++] = '%';
    if (fmt & FMTF_alt)
	format_str[fi++] = '#';
    if (fmt & FMTF_sgn)
	format_str[fi++] = '+';
    else if (fmt & FMTF_blk)
	format_str[fi++] = ' ';
    format_str[fi++] = '0';
    format_str[fi++] = '.';
    format_str[fi++] = '*';
	
    switch(fmt & FMTC_MASK) {
    case FMTC_G:
	format_str[fi] = 'E';
	goto gG_common;
    case FMTC_g:
	format_str[fi] = 'e';
    gG_common:
	if (dexp < -4.0 || exp >= precision) {
	    fi++;
	    precision--;
	    if (precision < 1)
		precision = 1;
	    goto eE_common;
	}
	/* fall through ... */
    case FMTC_f:
	format_str[fi++] = 'f';
	max_size += exp > 0 ? exp : 1;
	max_size++;
	if (precision)
	    max_size += precision;
	else if (fmt & FMTF_alt)
	    max_size++;
	break;
    case FMTC_E:
	format_str[fi++] = 'E';
	goto eE_common;
    case FMTC_e:
	format_str[fi++] = 'e';
    eE_common: {
	int aexp;

	max_size += 4;
	if (precision)
	    max_size += precision;
	else if (fmt & FMTF_alt)
	    max_size++;
	aexp = exp >= 0 ? exp : -exp;
	if (aexp < 100)
	    max_size += 2;
	else {
	    while (aexp) {
		max_size++;
		aexp /= 10;
	    }
	}
	break;
    }
    default:
	res = -EINVAL;
	goto out;
    }

    format_str[fi++] = '\0';
    ASSERT(fi <= sizeof(format_str));

    max_size++; /* '\0' */

    if (max_size < sizeof(sbuf))
	bufp = sbuf;
    else {
	bufp = (char *) malloc(sizeof(char)*max_size);
	if (!bufp) {
	    res = -ENOMEM;
	    goto out;
	}
    }

    size = sprintf(bufp, format_str, precision, val);
    if (size < 0) {
	if (errno > 0)
	    res = -errno;
	else
	    res = -EIO;
	goto out;
    }

    ASSERT(max_size >= size);

    res = fmt_fld(fn, arg, bufp, size, 0, width, 0, new_fmt, count);

    if (bufp != sbuf)
	free((void *) bufp);

 out:
    if (erts_printf_unblock_fpe)
	(*erts_printf_unblock_fpe)(fpe_was_unmasked);
    return res;
}

/* strnlen doesn't exist everywhere */
static size_t my_strnlen(const char *s, size_t maxlen)
{
    size_t i = 0;
    while (i < maxlen && s[i] != '\0')
	i++;
    return i;
}

int erts_printf_format(fmtfn_t fn, void* arg, char* fmt, va_list ap)
{
    char* ptr0 = fmt;
    char* ptr = ptr0;
    int count = 0;
    int n;
    int res = 0;

    while(*ptr) {
	unsigned long ul_val;
	int fmt        = 0;
	int width      = -1;
	int precision  = -1;

	if (res < 0)
	    return res;

	if (*ptr == '%') {
	    if ((n=ptr-ptr0))
		FMT(fn,arg,ptr0,n,count);
	    ptr++;

	do_flag:
	    switch(*ptr) {
	    case '#':  fmt |= FMTF_alt; ptr++; goto do_flag;
	    case '0':  fmt |= FMTF_pad; ptr++; goto do_flag;
	    case '-':  fmt |= FMTF_adj; ptr++; goto do_flag;
	    case ' ':  fmt |= FMTF_blk; ptr++; goto do_flag;
	    case '+':  fmt |= FMTF_sgn; ptr++; goto do_flag;
	    case '\'': fmt |= FMTF_cnv; ptr++; goto do_flag;
	    case 'I':  fmt |= FMTF_cnV; ptr++; goto do_flag;
	    }

	    /* width */
	    if (*ptr == '*') {
		width = va_arg(ap, int);
		ptr++;
	    }
	    else if (isdigit((int) *ptr)) {
		width = *ptr++ - '0';
		while(isdigit((int) *ptr))
		    width = 10*width + (*ptr++ - '0');
	    }

	    /* precision */
	    if (*ptr == '.') {
		ptr++;
		if (*ptr == '*') {
		    precision = va_arg(ap, int);
		    ptr++;
		}
		else if (isdigit((int) *ptr)) {
		    precision = *ptr++ - '0';
		    while(isdigit((int) *ptr))
			precision = 10*precision + (*ptr++ - '0');
		}
	    }

	    /* length modifier */
	    switch(*ptr) {
	    case 'b': {
		ptr++;
		if (*ptr == 'p') {
		    ptr++;
#if SIZEOF_INT == SIZEOF_VOID_P
#elif SIZEOF_LONG == SIZEOF_VOID_P
		    fmt |= FMTL_l;
#elif SIZEOF_LONG_LONG == SIZEOF_VOID_P
		    fmt |= FMTL_ll;
#else
#error No integer datatype with the same size as 'void *' found
#endif
		}
		else if (*ptr == 'e') {
		    ptr++;
#if SIZEOF_INT == ERTS_SIZEOF_ETERM
#elif SIZEOF_LONG == ERTS_SIZEOF_ETERM
		    fmt |= FMTL_l;
#elif SIZEOF_LONG_LONG == ERTS_SIZEOF_ETERM
		    fmt |= FMTL_ll;
#else
#error No integer datatype with the same size as Eterm found
#endif
		}
		else {
		    int bits = 0;
		    while(isdigit((int) *ptr))
			bits = 10*bits + (*ptr++ - '0');
		    switch (bits) {
		    case 64:
#if SIZEOF_INT == 8
#elif SIZEOF_LONG == 8
			fmt |= FMTL_l;
#elif SIZEOF_LONG_LONG == 8
			fmt |= FMTL_ll;
#else
#error No 64-bit integer datatype found
#endif
			break;
		    case 32:
#if SIZEOF_INT == 4
#elif SIZEOF_SHORT == 4
			fmt |= FMTL_h;
#elif SIZEOF_LONG == 4
			fmt |= FMTL_l;
#elif SIZEOF_LONG_LONG == 4
			fmt |= FMTL_ll;
#else
#error No 32-bit integer datatype found
#endif
			break;
		    case 16:
#if SIZEOF_INT == 2
#elif SIZEOF_SHORT == 2
			fmt |= FMTL_h;
#elif SIZEOF_LONG == 2
			fmt |= FMTL_l;
#else
#error No 16-bit integer datatype found
#endif
		    case 8:
#if SIZEOF_CHAR == 1
			fmt |= FMTL_hh;
#else
#error Unexpected size of char
#endif
			break;
		    default:
			return -EINVAL;
		    }
		}
		break;
	    }
	    case 'h': 
		ptr++;
		if (*ptr == 'h') {
		    ptr++;
		    fmt |= FMTL_hh;
		}
		else
		    fmt |= FMTL_h;
		break;
	    case 'l':
		ptr++;
		if (*ptr == 'l') {
		    ptr++;
#if SIZEOF_LONG_LONG
		    fmt |= FMTL_ll;
#else
		    fmt |= FMTL_l;
#endif
		}
		else
		    fmt |= FMTL_l;
		break;
	    case 'L': ptr++; fmt |= FMTL_L; break;
	    case 'j': ptr++; fmt |= FMTL_j; break;
	    case 't': ptr++; fmt |= FMTL_t; break;
	    }

	    /* specifier */
	    switch(*ptr) {
	    case 'd': ptr++; fmt |= FMTC_d; break;
	    case 'i': ptr++; fmt |= FMTC_d; break;
	    case 'o': ptr++; fmt |= FMTC_o; break;
	    case 'u': ptr++; fmt |= FMTC_u; break;
	    case 'x': ptr++; fmt |= FMTC_x; break;
	    case 'X': ptr++; fmt |= FMTC_X; break;
	    case 'e': ptr++; fmt |= FMTC_e; break;
	    case 'E': ptr++; fmt |= FMTC_E; break;
	    case 'f': ptr++; fmt |= FMTC_f; break;
	    case 'g': ptr++; fmt |= FMTC_g; break;
	    case 'G': ptr++; fmt |= FMTC_G; break;
	    case 'c': ptr++; fmt |= FMTC_c; break;
	    case 's': ptr++; fmt |= FMTC_s; break;
	    case 'p': ptr++; fmt |= FMTC_p; break;
	    case 'n': ptr++; fmt |= FMTC_n; break;
	    case 'T': ptr++; fmt |= FMTC_T; break;
	    case 'R': ptr++; fmt |= FMTC_R; break;
	    case '%':
		FMT(fn,arg,ptr,1,count);
		ptr++;
		ptr0 = ptr;
		continue;
	    default:
		/* ignore */
		ptr0 = ptr;
		continue;
	    }

	    switch(fmt & FMTC_MASK) {
	    case FMTC_d:
		switch(fmt & FMTL_MASK) {
		case FMTL_hh: {
		    signed char tval = (signed char) va_arg(ap,int);
		    ul_val = (unsigned long) (tval < 0 ? (-tval) : tval);
		    res = fmt_long(fn,arg,SIGN(tval),ul_val,
				   width,precision,fmt,&count);
		    break;
		}
		case FMTL_h: {
		    signed short tval = (signed short) va_arg(ap,int);
		    ul_val = (unsigned long) (tval < 0 ? (-tval) : tval);
		    res = fmt_long(fn,arg,SIGN(tval),ul_val,
				   width,precision,fmt,&count);
		    break;
		}
		case FMTL_l: {
		    signed long tval = (signed long) va_arg(ap,long);
		    ul_val = (unsigned long) (tval < 0 ? (-tval) : tval);
		    res = fmt_long(fn,arg,SIGN(tval),ul_val,
				   width,precision,fmt,&count);
		    break;
		}
#if SIZEOF_LONG_LONG
		case FMTL_ll: {
		    unsigned_long_long ull_val;
		    signed_long_long tval;
		    tval = (signed_long_long) va_arg(ap,long_long);
		    ull_val = (unsigned_long_long) (tval < 0 ? (-tval) : tval);
		    res = fmt_long_long(fn,arg,SIGN(tval),ull_val,
					width,precision,fmt,&count);
		    break;
		}
#endif
		default: {
		    signed int tval = (signed int) va_arg(ap,int);
		    ul_val = (unsigned long) (tval < 0 ? (-tval) : tval);
		    res = fmt_long(fn,arg,SIGN(tval),ul_val,
				   width,precision,fmt,&count);
		    break;
		}
		}
		break;
	    case FMTC_o:
	    case FMTC_u:
	    case FMTC_x:
	    case FMTC_X:
		switch(fmt & FMTL_MASK) {
		case FMTL_hh: {
		    unsigned char tval = (unsigned char) va_arg(ap,int);
		    ul_val = (unsigned long) tval;
		    res = fmt_long(fn,arg,USIGN(tval),ul_val,
				   width,precision,fmt,&count);
		    break;
		}
		case FMTL_h: {
		    unsigned short tval = (unsigned short) va_arg(ap,int);
		    ul_val = (unsigned long) tval;
		    res = fmt_long(fn,arg,USIGN(tval),ul_val,
				   width,precision,fmt,&count);
		    break;
		}
		case FMTL_l: {
		    ul_val = (unsigned long) va_arg(ap,long);
		    res = fmt_long(fn,arg,USIGN(ul_val),ul_val,
				   width,precision,fmt,&count);
		    break;
		}
#if SIZEOF_LONG_LONG
		case FMTL_ll: {
		    unsigned_long_long ull_val;
		    ull_val = (signed_long_long) va_arg(ap,long_long);
		    res = fmt_long_long(fn,arg,USIGN(ull_val),ull_val,
					width,precision,fmt,&count);
		    break;
		}
#endif
		default: {
		    unsigned int tval = (unsigned int) va_arg(ap,int);
		    ul_val = (unsigned long) tval;
		    res = fmt_long(fn,arg,USIGN(tval),ul_val,
				   width,precision,fmt,&count);
		    break;
		}
		}
		break;
	    case FMTC_e:
	    case FMTC_E:
	    case FMTC_f:
	    case FMTC_g:
	    case FMTC_G:
		if (precision < 0)
		    precision = 6;
		switch(fmt & FMTL_MASK) {
		case FMTL_L:
		    return -EINVAL;
		    break;
		default:
		    res = fmt_double(fn,arg,va_arg(ap,double),
				     width,precision,fmt,&count);
		    break;
		}
		break;

	    case FMTC_c: {
		/* fixme: add wide char support l-modifier */
		char c = va_arg(ap,int);
		int len = 1;
		if (precision == 0)
		    len = 0;
		if (width > 0 && !(fmt & FMTF_adj)) {
		    if (width > len)
			BLANKS(fn, arg, width - len, count);
		}
		if (len)
		    FMT(fn,arg,&c,len,count);
		if (width > len && fmt & FMTF_adj)
		    BLANKS(fn, arg, width - len, count);
		break;
	    }
		
	    case FMTC_s: {
		char* str = va_arg(ap,char*);
		int len = (precision >= 0) ? my_strnlen(str,precision) : strlen(str);
		if (width > 0 && !(fmt & FMTF_adj)) {
		    if (width > len)
			BLANKS(fn, arg, width - len, count);
		}
		if (len)
		    FMT(fn,arg,str,len,count);
		if (width > len && fmt & FMTF_adj)
		    BLANKS(fn, arg, width - len, count);
		break;
	    }

	    case FMTC_p: {
		void* addr = va_arg(ap, void*);

		res = fmt_long(fn,
			       arg,
			       USIGN((unsigned long) addr),
			       (unsigned long) addr,
			       width < 0 ? ((int) 2*sizeof(void *)) : width,
			       (precision < 0
				? ((int) 2*sizeof(void *))
				: precision),
			       FMTC_x|FMTF_pad|FMTF_alt,
			       &count);
		break;
	    }

	    case FMTC_n:
		switch(fmt & FMTL_MASK) {
		case FMTL_hh: *va_arg(ap,char*) = count; break;
		case FMTL_h:  *va_arg(ap,short*) = count; break;
		case FMTL_l:  *va_arg(ap,long*) = count; break;
#if SIZEOF_LONG_LONG
		case FMTL_ll: *va_arg(ap,long_long*) = count; break;
#endif
		default: *va_arg(ap,int*) = count; break;
		}
		break;
	    case FMTC_T:    /* Eterm */
	    case FMTC_R: {  /* Eterm, Eterm* base  (base ignored if !HALFWORD_HEAP) */
		long prec;
		unsigned long eterm;
		unsigned long* eterm_base;
		
		if (!erts_printf_eterm_func)
		    return -EINVAL;
		if (precision < 0)
		    prec = 100000;
		else if (precision == INT_MAX)
		    prec = LONG_MAX;
		else
		    prec = (long) precision;
		eterm = va_arg(ap, unsigned long);
		eterm_base = ((fmt & FMTC_MASK) == FMTC_R) ?
		    va_arg(ap, unsigned long*) : NULL;
		if (width > 0 && !(fmt & FMTF_adj)) {
		    res = (*erts_printf_eterm_func)(noop_fn, NULL, eterm, prec, eterm_base);
		    if (res < 0)
			return res;
		    if (width > res)
			BLANKS(fn, arg, width - res, count);
		}
		res = (*erts_printf_eterm_func)(fn, arg, eterm, prec, eterm_base);
		if (res < 0)
		    return res;
		count += res;
		if (width > res && fmt & FMTF_adj)
		    BLANKS(fn, arg, width - res, count);
		break;
	    }
	    default:
		if ((n=ptr-ptr0))
		    FMT(fn,arg,ptr0,n,count);
	    }
	    ptr0 = ptr;
	}
	else 
	    ptr++;
    }
    
    if ((n=ptr-ptr0))
	FMT(fn,arg,ptr0,n,count);
    return count;
}


int
erts_printf_char(fmtfn_t fn, void *arg, char c)
{
    return (*fn)(arg, &c, 1);
}

int
erts_printf_string(fmtfn_t fn, void *arg, char *str)
{
    size_t sz = strlen(str);
    return (*fn)(arg, str, sz);
}

int
erts_printf_buf(fmtfn_t fn, void *arg, char *buf, size_t sz)
{
    return (*fn)(arg, buf, sz);
}

int
erts_printf_pointer(fmtfn_t fn, void *arg, void *ptr)
{
    int count = 0;
    int res = fmt_long(fn, arg, USIGN((unsigned long) ptr),
		       (unsigned long) ptr, 2*sizeof(void *),
		       2*sizeof(void *), FMTC_x|FMTF_pad|FMTF_alt, &count);
    if (res < 0)
	return res;
    return count;
}

int
erts_printf_ulong(fmtfn_t fn, void *arg, char conv, int pad, int width,
		  unsigned long val)
{
    int count = 0;
    int res;
    int fmt = 0;
    int prec = -1;
    switch (conv) {
    case 'o': fmt |= FMTC_o; break;
    case 'u': fmt |= FMTC_u; break;
    case 'x': fmt |= FMTC_x; break;
    case 'X': fmt |= FMTC_X; break;
    case 'p': fmt |= FMTC_p; break;
    default:
	return -EINVAL;
    }
    if (pad)
	prec = width;
    res = fmt_long(fn, arg, USIGN(val), val, width, prec, fmt, &count);
    if (res < 0)
	return res;
    return count;
}

extern int
erts_printf_slong(fmtfn_t fn, void *arg, char conv, int pad, int width,
		  signed long val)
{
    int count = 0;
    int res;
    int fmt = 0;
    int prec = -1;
    unsigned long ul_val;
    switch (conv) {
    case 'd': fmt |= FMTC_d; break;
    case 'i': fmt |= FMTC_d; break;
    case 'o': fmt |= FMTC_o; break;
    case 'x': fmt |= FMTC_x; break;
    case 'X': fmt |= FMTC_X; break;
    default:
	return -EINVAL;
    }
    if (pad)
	prec = width;
    ul_val = (unsigned long) (val < 0 ? -val : val);
    res = fmt_long(fn, arg, SIGN(val), ul_val, width, prec, fmt, &count);
    if (res < 0)
	return res;
    return count;
}

int
erts_printf_double(fmtfn_t fn, void *arg, char conv, int precision, int width,
		   double val)
{
    int count = 0;
    int res;
    int fmt = 0;
    switch (conv) {
    case 'e': fmt |= FMTC_e; break;
    case 'E': fmt |= FMTC_E; break;
    case 'f': fmt |= FMTC_f; break;
    case 'g': fmt |= FMTC_g; break;
    case 'G': fmt |= FMTC_G; break;
    default:
	return -EINVAL;
    }
    res = fmt_double(fn, arg, val, width, precision, fmt, &count);
    if (res < 0)
	return res;
    return count;
}