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
|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2005-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
/* Without this, variable argument lists break on VxWorks */
#ifdef VXWORKS
#include <vxWorks.h>
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "erl_errno.h"
#ifdef __WIN32__
# include <io.h>
#else
# include <unistd.h>
#endif
#include "erl_printf.h"
#include "erl_printf_format.h"
#ifdef DEBUG
#include <assert.h>
#define ASSERT(X) assert(X)
#else
#define ASSERT(X)
#endif
#if defined(__WIN32__) && !defined(__GNUC__)
typedef int ssize_t;
#endif
int (*erts_printf_stdout_func)(char *, va_list) = NULL;
int (*erts_printf_stderr_func)(char *, va_list) = NULL;
int erts_printf_add_cr_to_stdout = 0;
int erts_printf_add_cr_to_stderr = 0;
int (*erts_printf_block_fpe)(void) = NULL;
void (*erts_printf_unblock_fpe)(int) = NULL;
#undef FLOCKFILE
#undef FUNLOCKFILE
#undef PUTC
#undef FWRITE
#undef PUTC_ON_SMALL_WRITES
#if defined(USE_THREADS) && defined(HAVE_FLOCKFILE)
# define FLOCKFILE(FP) flockfile(FP)
# define FUNLOCKFILE(FP) funlockfile(FP)
# ifdef HAVE_PUTC_UNLOCKED
# define PUTC putc_unlocked
# define PUTC_ON_SMALL_WRITES
# endif
# ifdef HAVE_FWRITE_UNLOCKED
# define FWRITE fwrite_unlocked
# endif
#endif
#if !defined(FLOCKFILE) || !defined(FUNLOCKFILE)
# define FLOCKFILE(FP)
# define FUNLOCKFILE(FP)
#endif
#ifndef PUTC
# define PUTC putc
#endif
#ifndef FWRITE
# define FWRITE fwrite
#endif
/* We use write for stdout and stderr as they could be
set to non-blocking by shell drivers, and non-blocking
FILE * functions work unpredictably as best */
static int
printf_putc(int c, FILE *stream) {
if ((FILE*)stream == stdout || (FILE*)stream == stderr) {
int fd = stream == stdout ? fileno(stdout) : fileno(stderr);
/* cast to a char here, because write expects bytes. */
unsigned char buf[1] = { c };
int res;
do {
res = write(fd, buf, 1);
} while (res == -1 && (errno == EAGAIN || errno == EINTR));
if (res == -1) return EOF;
return res;
}
return PUTC(c, stream);
}
static size_t
printf_fwrite(const void *ptr, size_t size, size_t nitems,
FILE *stream) {
if ((FILE*)stream == stdout || (FILE*)stream == stderr) {
int fd = stream == stdout ? fileno(stdout) : fileno(stderr);
int res;
do {
res = write(fd, ptr, size*nitems);
} while (res == -1 && (errno == EAGAIN || errno == EINTR));
if (res == -1) return 0;
return res;
}
return FWRITE(ptr, size, nitems, stream);
}
static int
get_error_result(void)
{
int res = errno;
if (res <= 0)
res = EIO;
return -res;
}
static int
write_f_add_cr(void *vfp, char* buf, size_t len)
{
size_t i;
ASSERT(vfp);
for (i = 0; i < len; i++) {
if (buf[i] == '\n' && printf_putc('\r', (FILE *) vfp) == EOF)
return get_error_result();
if (printf_putc(buf[i], (FILE *) vfp) == EOF)
return get_error_result();
}
return len;
}
static int
write_f(void *vfp, char* buf, size_t len)
{
ASSERT(vfp);
#ifdef PUTC_ON_SMALL_WRITES
if (len <= 64) { /* Try to optimize writes of small bufs. */
int i;
for (i = 0; i < len; i++)
if (printf_putc(buf[i], (FILE *) vfp) == EOF)
return get_error_result();
}
else
#endif
if (printf_fwrite((void *) buf, sizeof(char), len, (FILE *) vfp) != len)
return get_error_result();
return len;
}
int
erts_write_fd(void *vfdp, char* buf, size_t len)
{
ssize_t size;
size_t res = len;
ASSERT(vfdp);
while (len) {
size = write(*((int *) vfdp), (void *) buf, len);
if (size < 0) {
#ifdef EINTR
if (errno == EINTR)
continue;
#endif
return get_error_result();
}
if (size > len)
return -EIO;
len -= size;
}
return res;
}
static int
write_s(void *vwbufpp, char* bufp, size_t len)
{
char **wbufpp = (char **) vwbufpp;
ASSERT(wbufpp && *wbufpp);
ASSERT(len > 0);
memcpy((void *) *wbufpp, (void *) bufp, len);
*wbufpp += len;
return len;
}
typedef struct {
char *buf;
size_t len;
} write_sn_arg_t;
static int
write_sn(void *vwsnap, char* buf, size_t len)
{
int rv = 0;
write_sn_arg_t *wsnap = (write_sn_arg_t *) vwsnap;
ASSERT(wsnap);
ASSERT(len > 0);
if (wsnap->len > 0) {
size_t sz = len;
if (sz >= wsnap->len)
sz = wsnap->len;
rv = (int)sz;
memcpy((void *) wsnap->buf, (void *) buf, sz);
wsnap->buf += sz;
wsnap->len -= sz;
return sz;
}
return rv;
}
int
erts_write_ds(void *vdsbufp, char* buf, size_t len)
{
erts_dsprintf_buf_t *dsbufp = (erts_dsprintf_buf_t *) vdsbufp;
size_t need_len = len + 1; /* Also trailing '\0' */
ASSERT(dsbufp);
ASSERT(len > 0);
ASSERT(dsbufp->str_len <= dsbufp->size);
if (need_len > dsbufp->size - dsbufp->str_len) {
dsbufp = (*dsbufp->grow)(dsbufp, need_len);
if (!dsbufp)
return -ENOMEM;
}
memcpy((void *) (dsbufp->str + dsbufp->str_len), (void *) buf, len);
dsbufp->str_len += len;
return len;
}
int
erts_printf(const char *format, ...)
{
int res;
va_list arglist;
va_start(arglist, format);
errno = 0;
if (erts_printf_stdout_func)
res = (*erts_printf_stdout_func)((char *) format, arglist);
else {
FLOCKFILE(stdout);
res = erts_printf_format(erts_printf_add_cr_to_stdout
? write_f_add_cr
: write_f,
(void *) stdout,
(char *) format,
arglist);
FUNLOCKFILE(stdout);
}
va_end(arglist);
return res;
}
int
erts_fprintf(FILE *filep, const char *format, ...)
{
int res;
va_list arglist;
va_start(arglist, format);
errno = 0;
if (erts_printf_stdout_func && filep == stdout)
res = (*erts_printf_stdout_func)((char *) format, arglist);
else if (erts_printf_stderr_func && filep == stderr)
res = (*erts_printf_stderr_func)((char *) format, arglist);
else {
int (*fmt_f)(void*, char*, size_t);
if (erts_printf_add_cr_to_stdout && filep == stdout)
fmt_f = write_f_add_cr;
else if (erts_printf_add_cr_to_stderr && filep == stderr)
fmt_f = write_f_add_cr;
else
fmt_f = write_f;
FLOCKFILE(filep);
res = erts_printf_format(fmt_f,(void *)filep,(char *)format,arglist);
FUNLOCKFILE(filep);
}
va_end(arglist);
return res;
}
int
erts_fdprintf(int fd, const char *format, ...)
{
int res;
va_list arglist;
va_start(arglist, format);
errno = 0;
res = erts_printf_format(erts_write_fd,(void *)&fd,(char *)format,arglist);
va_end(arglist);
return res;
}
int
erts_sprintf(char *buf, const char *format, ...)
{
int res;
char *p = buf;
va_list arglist;
va_start(arglist, format);
errno = 0;
res = erts_printf_format(write_s, (void *) &p, (char *) format, arglist);
if (res < 0)
buf[0] = '\0';
else
buf[res] = '\0';
va_end(arglist);
return res;
}
int
erts_snprintf(char *buf, size_t size, const char *format, ...)
{
write_sn_arg_t wsnap;
int res;
va_list arglist;
if (size < 1)
return -EINVAL;
wsnap.buf = buf;
wsnap.len = size-1; /* Always need room for trailing '\0' */
va_start(arglist, format);
errno = 0;
res = erts_printf_format(write_sn, (void *)&wsnap, (char *)format, arglist);
if (res < 0)
buf[0] = '\0';
else if (res < size)
buf[res] = '\0';
else
buf[size-1] = '\0';
va_end(arglist);
return res;
}
int
erts_dsprintf(erts_dsprintf_buf_t *dsbufp, const char *format, ...)
{
int res;
va_list arglist;
if (!dsbufp)
return -EINVAL;
va_start(arglist, format);
errno = 0;
res = erts_printf_format(erts_write_ds, (void *)dsbufp, (char *)format, arglist);
if (dsbufp->str) {
if (res < 0)
dsbufp->str[0] = '\0';
else
dsbufp->str[dsbufp->str_len] = '\0';
}
va_end(arglist);
return res;
}
/*
* Callback printf
*/
int erts_cbprintf(fmtfn_t cb_fn, void* cb_arg, const char* format, ...)
{
int res;
va_list arglist;
va_start(arglist, format);
errno = 0;
res = erts_printf_format(cb_fn, cb_arg, (char *)format, arglist);
va_end(arglist);
return res;
}
int
erts_vprintf(const char *format, va_list arglist)
{
int res;
if (erts_printf_stdout_func)
res = (*erts_printf_stdout_func)((char *) format, arglist);
else {
errno = 0;
res = erts_printf_format(erts_printf_add_cr_to_stdout
? write_f_add_cr
: write_f,
(void *) stdout,
(char *) format,
arglist);
}
return res;
}
int
erts_vfprintf(FILE *filep, const char *format, va_list arglist)
{
int res;
if (erts_printf_stdout_func && filep == stdout)
res = (*erts_printf_stdout_func)((char *) format, arglist);
else if (erts_printf_stderr_func && filep == stderr)
res = (*erts_printf_stderr_func)((char *) format, arglist);
else {
int (*fmt_f)(void*, char*, size_t);
errno = 0;
if (erts_printf_add_cr_to_stdout && filep == stdout)
fmt_f = write_f_add_cr;
else if (erts_printf_add_cr_to_stderr && filep == stderr)
fmt_f = write_f_add_cr;
else
fmt_f = write_f;
res = erts_printf_format(fmt_f,(void *)filep,(char *)format,arglist);
}
return res;
}
int
erts_vfdprintf(int fd, const char *format, va_list arglist)
{
int res;
errno = 0;
res = erts_printf_format(erts_write_fd,(void *)&fd,(char *)format,arglist);
return res;
}
int
erts_vsprintf(char *buf, const char *format, va_list arglist)
{
int res;
char *p = buf;
errno = 0;
res = erts_printf_format(write_s, (void *) &p, (char *) format, arglist);
if (res < 0)
buf[0] = '\0';
else
buf[res] = '\0';
return res;
}
int
erts_vsnprintf(char *buf, size_t size, const char *format, va_list arglist)
{
write_sn_arg_t wsnap;
int res;
if (size < 1)
return -EINVAL;
wsnap.buf = buf;
wsnap.len = size-1; /* Always need room for trailing '\0' */
errno = 0;
res = erts_printf_format(write_sn, (void *)&wsnap, (char *)format, arglist);
if (res < 0)
buf[0] = '\0';
else if (res < size)
buf[res] = '\0';
else
buf[size-1] = '\0';
return res;
}
int
erts_vdsprintf(erts_dsprintf_buf_t *dsbufp, const char *format, va_list arglist)
{
int res;
if (!dsbufp)
return -EINVAL;
errno = 0;
res = erts_printf_format(erts_write_ds, (void *)dsbufp, (char *)format, arglist);
if (dsbufp->str) {
if (res < 0)
dsbufp->str[0] = '\0';
else
dsbufp->str[dsbufp->str_len] = '\0';
}
return res;
}
int
erts_vcbprintf(fmtfn_t cb_fn, void* cb_arg, const char *format, va_list arglist)
{
errno = 0;
return erts_printf_format(cb_fn, cb_arg, (char *)format, arglist);
}
|