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- Committer: Bazaar Package Importer
- Author(s): Luca Falavigna
- Date: 2008-11-10 22:21:49 UTC
- mfrom: (1.10.3 upstream) (5.1.2 sid)
- Revision ID: james.westby@ubuntu.com-20081110222149-pr35f3nmqy5cf52i
Tags: 0.5.21+dfsg-1ubuntu1
* Merge from Debian unstable, remaining Ubuntu changes:
- (Build-)depend on libltdl7-dev (Ubuntu-specific change).
- (Build-)depend on libltdl7-dev (Ubuntu-specific change).
added
removed
intl/vasnprintf.c
1
/* vsprintf with automatic memory allocation.
2
Copyright (C) 1999, 2002-2006 Free Software Foundation, Inc.
3
4
This program is free software; you can redistribute it and/or modify it
5
under the terms of the GNU Library General Public License as published
6
by the Free Software Foundation; either version 2, or (at your option)
7
any later version.
8
9
This program is distributed in the hope that it will be useful,
10
but WITHOUT ANY WARRANTY; without even the implied warranty of
11
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12
Library General Public License for more details.
13
14
You should have received a copy of the GNU Library General Public
15
License along with this program; if not, write to the Free Software
16
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
17
USA. */
18
19
/* Tell glibc's <stdio.h> to provide a prototype for snprintf().
20
This must come before <config.h> because <config.h> may include
21
<features.h>, and once <features.h> has been included, it's too late. */
22
#ifndef _GNU_SOURCE
23
# define _GNU_SOURCE 1
24
#endif
25
26
#include <config.h>
27
#ifndef IN_LIBINTL
28
# include <alloca.h>
29
#endif
30
31
/* Specification. */
32
#if WIDE_CHAR_VERSION
33
# include "vasnwprintf.h"
34
#else
35
# include "vasnprintf.h"
36
#endif
37
38
#include <stdio.h> /* snprintf(), sprintf() */
39
#include <stdlib.h> /* abort(), malloc(), realloc(), free() */
40
#include <string.h> /* memcpy(), strlen() */
41
#include <errno.h> /* errno */
42
#include <limits.h> /* CHAR_BIT */
43
#include <float.h> /* DBL_MAX_EXP, LDBL_MAX_EXP */
44
#if WIDE_CHAR_VERSION
45
# include "wprintf-parse.h"
46
#else
47
# include "printf-parse.h"
48
#endif
49
50
/* Checked size_t computations. */
51
#include "xsize.h"
52
53
#ifdef HAVE_WCHAR_T
54
# ifdef HAVE_WCSLEN
55
# define local_wcslen wcslen
56
# else
57
/* Solaris 2.5.1 has wcslen() in a separate library libw.so. To avoid
58
a dependency towards this library, here is a local substitute.
59
Define this substitute only once, even if this file is included
60
twice in the same compilation unit. */
61
# ifndef local_wcslen_defined
62
# define local_wcslen_defined 1
63
static size_t
64
local_wcslen (const wchar_t *s)
65
{
66
const wchar_t *ptr;
67
68
for (ptr = s; *ptr != (wchar_t) 0; ptr++)
69
;
70
return ptr - s;
71
}
72
# endif
73
# endif
74
#endif
75
76
#if WIDE_CHAR_VERSION
77
# define VASNPRINTF vasnwprintf
78
# define CHAR_T wchar_t
79
# define DIRECTIVE wchar_t_directive
80
# define DIRECTIVES wchar_t_directives
81
# define PRINTF_PARSE wprintf_parse
82
# define USE_SNPRINTF 1
83
# if HAVE_DECL__SNWPRINTF
84
/* On Windows, the function swprintf() has a different signature than
85
on Unix; we use the _snwprintf() function instead. */
86
# define SNPRINTF _snwprintf
87
# else
88
/* Unix. */
89
# define SNPRINTF swprintf
90
# endif
91
#else
92
# define VASNPRINTF vasnprintf
93
# define CHAR_T char
94
# define DIRECTIVE char_directive
95
# define DIRECTIVES char_directives
96
# define PRINTF_PARSE printf_parse
97
# define USE_SNPRINTF (HAVE_DECL__SNPRINTF || HAVE_SNPRINTF)
98
# if HAVE_DECL__SNPRINTF
99
/* Windows. */
100
# define SNPRINTF _snprintf
101
# else
102
/* Unix. */
103
# define SNPRINTF snprintf
104
# endif
105
#endif
106
107
CHAR_T *
108
VASNPRINTF (CHAR_T *resultbuf, size_t *lengthp, const CHAR_T *format, va_list args)
109
{
110
DIRECTIVES d;
111
arguments a;
112
113
if (PRINTF_PARSE (format, &d, &a) < 0)
114
{
115
errno = EINVAL;
116
return NULL;
117
}
118
119
#define CLEANUP() \
120
free (d.dir); \
121
if (a.arg) \
122
free (a.arg);
123
124
if (printf_fetchargs (args, &a) < 0)
125
{
126
CLEANUP ();
127
errno = EINVAL;
128
return NULL;
129
}
130
131
{
132
size_t buf_neededlength;
133
CHAR_T *buf;
134
CHAR_T *buf_malloced;
135
const CHAR_T *cp;
136
size_t i;
137
DIRECTIVE *dp;
138
/* Output string accumulator. */
139
CHAR_T *result;
140
size_t allocated;
141
size_t length;
142
143
/* Allocate a small buffer that will hold a directive passed to
144
sprintf or snprintf. */
145
buf_neededlength =
146
xsum4 (7, d.max_width_length, d.max_precision_length, 6);
147
#if HAVE_ALLOCA
148
if (buf_neededlength < 4000 / sizeof (CHAR_T))
149
{
150
buf = (CHAR_T *) alloca (buf_neededlength * sizeof (CHAR_T));
151
buf_malloced = NULL;
152
}
153
else
154
#endif
155
{
156
size_t buf_memsize = xtimes (buf_neededlength, sizeof (CHAR_T));
157
if (size_overflow_p (buf_memsize))
158
goto out_of_memory_1;
159
buf = (CHAR_T *) malloc (buf_memsize);
160
if (buf == NULL)
161
goto out_of_memory_1;
162
buf_malloced = buf;
163
}
164
165
if (resultbuf != NULL)
166
{
167
result = resultbuf;
168
allocated = *lengthp;
169
}
170
else
171
{
172
result = NULL;
173
allocated = 0;
174
}
175
length = 0;
176
/* Invariants:
177
result is either == resultbuf or == NULL or malloc-allocated.
178
If length > 0, then result != NULL. */
179
180
/* Ensures that allocated >= needed. Aborts through a jump to
181
out_of_memory if needed is SIZE_MAX or otherwise too big. */
182
#define ENSURE_ALLOCATION(needed) \
183
if ((needed) > allocated) \
184
{ \
185
size_t memory_size; \
186
CHAR_T *memory; \
187
\
188
allocated = (allocated > 0 ? xtimes (allocated, 2) : 12); \
189
if ((needed) > allocated) \
190
allocated = (needed); \
191
memory_size = xtimes (allocated, sizeof (CHAR_T)); \
192
if (size_overflow_p (memory_size)) \
193
goto out_of_memory; \
194
if (result == resultbuf || result == NULL) \
195
memory = (CHAR_T *) malloc (memory_size); \
196
else \
197
memory = (CHAR_T *) realloc (result, memory_size); \
198
if (memory == NULL) \
199
goto out_of_memory; \
200
if (result == resultbuf && length > 0) \
201
memcpy (memory, result, length * sizeof (CHAR_T)); \
202
result = memory; \
203
}
204
205
for (cp = format, i = 0, dp = &d.dir[0]; ; cp = dp->dir_end, i++, dp++)
206
{
207
if (cp != dp->dir_start)
208
{
209
size_t n = dp->dir_start - cp;
210
size_t augmented_length = xsum (length, n);
211
212
ENSURE_ALLOCATION (augmented_length);
213
memcpy (result + length, cp, n * sizeof (CHAR_T));
214
length = augmented_length;
215
}
216
if (i == d.count)
217
break;
218
219
/* Execute a single directive. */
220
if (dp->conversion == '%')
221
{
222
size_t augmented_length;
223
224
if (!(dp->arg_index == ARG_NONE))
225
abort ();
226
augmented_length = xsum (length, 1);
227
ENSURE_ALLOCATION (augmented_length);
228
result[length] = '%';
229
length = augmented_length;
230
}
231
else
232
{
233
if (!(dp->arg_index != ARG_NONE))
234
abort ();
235
236
if (dp->conversion == 'n')
237
{
238
switch (a.arg[dp->arg_index].type)
239
{
240
case TYPE_COUNT_SCHAR_POINTER:
241
*a.arg[dp->arg_index].a.a_count_schar_pointer = length;
242
break;
243
case TYPE_COUNT_SHORT_POINTER:
244
*a.arg[dp->arg_index].a.a_count_short_pointer = length;
245
break;
246
case TYPE_COUNT_INT_POINTER:
247
*a.arg[dp->arg_index].a.a_count_int_pointer = length;
248
break;
249
case TYPE_COUNT_LONGINT_POINTER:
250
*a.arg[dp->arg_index].a.a_count_longint_pointer = length;
251
break;
252
#ifdef HAVE_LONG_LONG_INT
253
case TYPE_COUNT_LONGLONGINT_POINTER:
254
*a.arg[dp->arg_index].a.a_count_longlongint_pointer = length;
255
break;
256
#endif
257
default:
258
abort ();
259
}
260
}
261
else
262
{
263
arg_type type = a.arg[dp->arg_index].type;
264
CHAR_T *p;
265
unsigned int prefix_count;
266
int prefixes[2];
267
#if !USE_SNPRINTF
268
size_t tmp_length;
269
CHAR_T tmpbuf[700];
270
CHAR_T *tmp;
271
272
/* Allocate a temporary buffer of sufficient size for calling
273
sprintf. */
274
{
275
size_t width;
276
size_t precision;
277
278
width = 0;
279
if (dp->width_start != dp->width_end)
280
{
281
if (dp->width_arg_index != ARG_NONE)
282
{
283
int arg;
284
285
if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
286
abort ();
287
arg = a.arg[dp->width_arg_index].a.a_int;
288
width = (arg < 0 ? (unsigned int) (-arg) : arg);
289
}
290
else
291
{
292
const CHAR_T *digitp = dp->width_start;
293
294
do
295
width = xsum (xtimes (width, 10), *digitp++ - '0');
296
while (digitp != dp->width_end);
297
}
298
}
299
300
precision = 6;
301
if (dp->precision_start != dp->precision_end)
302
{
303
if (dp->precision_arg_index != ARG_NONE)
304
{
305
int arg;
306
307
if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
308
abort ();
309
arg = a.arg[dp->precision_arg_index].a.a_int;
310
precision = (arg < 0 ? 0 : arg);
311
}
312
else
313
{
314
const CHAR_T *digitp = dp->precision_start + 1;
315
316
precision = 0;
317
while (digitp != dp->precision_end)
318
precision = xsum (xtimes (precision, 10), *digitp++ - '0');
319
}
320
}
321
322
switch (dp->conversion)
323
{
324
325
case 'd': case 'i': case 'u':
326
# ifdef HAVE_LONG_LONG_INT
327
if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
328
tmp_length =
329
(unsigned int) (sizeof (unsigned long long) * CHAR_BIT
330
* 0.30103 /* binary -> decimal */
331
)
332
+ 1; /* turn floor into ceil */
333
else
334
# endif
335
if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
336
tmp_length =
337
(unsigned int) (sizeof (unsigned long) * CHAR_BIT
338
* 0.30103 /* binary -> decimal */
339
)
340
+ 1; /* turn floor into ceil */
341
else
342
tmp_length =
343
(unsigned int) (sizeof (unsigned int) * CHAR_BIT
344
* 0.30103 /* binary -> decimal */
345
)
346
+ 1; /* turn floor into ceil */
347
if (tmp_length < precision)
348
tmp_length = precision;
349
/* Multiply by 2, as an estimate for FLAG_GROUP. */
350
tmp_length = xsum (tmp_length, tmp_length);
351
/* Add 1, to account for a leading sign. */
352
tmp_length = xsum (tmp_length, 1);
353
break;
354
355
case 'o':
356
# ifdef HAVE_LONG_LONG_INT
357
if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
358
tmp_length =
359
(unsigned int) (sizeof (unsigned long long) * CHAR_BIT
360
* 0.333334 /* binary -> octal */
361
)
362
+ 1; /* turn floor into ceil */
363
else
364
# endif
365
if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
366
tmp_length =
367
(unsigned int) (sizeof (unsigned long) * CHAR_BIT
368
* 0.333334 /* binary -> octal */
369
)
370
+ 1; /* turn floor into ceil */
371
else
372
tmp_length =
373
(unsigned int) (sizeof (unsigned int) * CHAR_BIT
374
* 0.333334 /* binary -> octal */
375
)
376
+ 1; /* turn floor into ceil */
377
if (tmp_length < precision)
378
tmp_length = precision;
379
/* Add 1, to account for a leading sign. */
380
tmp_length = xsum (tmp_length, 1);
381
break;
382
383
case 'x': case 'X':
384
# ifdef HAVE_LONG_LONG_INT
385
if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
386
tmp_length =
387
(unsigned int) (sizeof (unsigned long long) * CHAR_BIT
388
* 0.25 /* binary -> hexadecimal */
389
)
390
+ 1; /* turn floor into ceil */
391
else
392
# endif
393
if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
394
tmp_length =
395
(unsigned int) (sizeof (unsigned long) * CHAR_BIT
396
* 0.25 /* binary -> hexadecimal */
397
)
398
+ 1; /* turn floor into ceil */
399
else
400
tmp_length =
401
(unsigned int) (sizeof (unsigned int) * CHAR_BIT
402
* 0.25 /* binary -> hexadecimal */
403
)
404
+ 1; /* turn floor into ceil */
405
if (tmp_length < precision)
406
tmp_length = precision;
407
/* Add 2, to account for a leading sign or alternate form. */
408
tmp_length = xsum (tmp_length, 2);
409
break;
410
411
case 'f': case 'F':
412
# ifdef HAVE_LONG_DOUBLE
413
if (type == TYPE_LONGDOUBLE)
414
tmp_length =
415
(unsigned int) (LDBL_MAX_EXP
416
* 0.30103 /* binary -> decimal */
417
* 2 /* estimate for FLAG_GROUP */
418
)
419
+ 1 /* turn floor into ceil */
420
+ 10; /* sign, decimal point etc. */
421
else
422
# endif
423
tmp_length =
424
(unsigned int) (DBL_MAX_EXP
425
* 0.30103 /* binary -> decimal */
426
* 2 /* estimate for FLAG_GROUP */
427
)
428
+ 1 /* turn floor into ceil */
429
+ 10; /* sign, decimal point etc. */
430
tmp_length = xsum (tmp_length, precision);
431
break;
432
433
case 'e': case 'E': case 'g': case 'G':
434
case 'a': case 'A':
435
tmp_length =
436
12; /* sign, decimal point, exponent etc. */
437
tmp_length = xsum (tmp_length, precision);
438
break;
439
440
case 'c':
441
# if defined HAVE_WINT_T && !WIDE_CHAR_VERSION
442
if (type == TYPE_WIDE_CHAR)
443
tmp_length = MB_CUR_MAX;
444
else
445
# endif
446
tmp_length = 1;
447
break;
448
449
case 's':
450
# ifdef HAVE_WCHAR_T
451
if (type == TYPE_WIDE_STRING)
452
{
453
tmp_length =
454
local_wcslen (a.arg[dp->arg_index].a.a_wide_string);
455
456
# if !WIDE_CHAR_VERSION
457
tmp_length = xtimes (tmp_length, MB_CUR_MAX);
458
# endif
459
}
460
else
461
# endif
462
tmp_length = strlen (a.arg[dp->arg_index].a.a_string);
463
break;
464
465
case 'p':
466
tmp_length =
467
(unsigned int) (sizeof (void *) * CHAR_BIT
468
* 0.25 /* binary -> hexadecimal */
469
)
470
+ 1 /* turn floor into ceil */
471
+ 2; /* account for leading 0x */
472
break;
473
474
default:
475
abort ();
476
}
477
478
if (tmp_length < width)
479
tmp_length = width;
480
481
tmp_length = xsum (tmp_length, 1); /* account for trailing NUL */
482
}
483
484
if (tmp_length <= sizeof (tmpbuf) / sizeof (CHAR_T))
485
tmp = tmpbuf;
486
else
487
{
488
size_t tmp_memsize = xtimes (tmp_length, sizeof (CHAR_T));
489
490
if (size_overflow_p (tmp_memsize))
491
/* Overflow, would lead to out of memory. */
492
goto out_of_memory;
493
tmp = (CHAR_T *) malloc (tmp_memsize);
494
if (tmp == NULL)
495
/* Out of memory. */
496
goto out_of_memory;
497
}
498
#endif
499
500
/* Construct the format string for calling snprintf or
501
sprintf. */
502
p = buf;
503
*p++ = '%';
504
if (dp->flags & FLAG_GROUP)
505
*p++ = '\'';
506
if (dp->flags & FLAG_LEFT)
507
*p++ = '-';
508
if (dp->flags & FLAG_SHOWSIGN)
509
*p++ = '+';
510
if (dp->flags & FLAG_SPACE)
511
*p++ = ' ';
512
if (dp->flags & FLAG_ALT)
513
*p++ = '#';
514
if (dp->flags & FLAG_ZERO)
515
*p++ = '0';
516
if (dp->width_start != dp->width_end)
517
{
518
size_t n = dp->width_end - dp->width_start;
519
memcpy (p, dp->width_start, n * sizeof (CHAR_T));
520
p += n;
521
}
522
if (dp->precision_start != dp->precision_end)
523
{
524
size_t n = dp->precision_end - dp->precision_start;
525
memcpy (p, dp->precision_start, n * sizeof (CHAR_T));
526
p += n;
527
}
528
529
switch (type)
530
{
531
#ifdef HAVE_LONG_LONG_INT
532
case TYPE_LONGLONGINT:
533
case TYPE_ULONGLONGINT:
534
*p++ = 'l';
535
/*FALLTHROUGH*/
536
#endif
537
case TYPE_LONGINT:
538
case TYPE_ULONGINT:
539
#ifdef HAVE_WINT_T
540
case TYPE_WIDE_CHAR:
541
#endif
542
#ifdef HAVE_WCHAR_T
543
case TYPE_WIDE_STRING:
544
#endif
545
*p++ = 'l';
546
break;
547
#ifdef HAVE_LONG_DOUBLE
548
case TYPE_LONGDOUBLE:
549
*p++ = 'L';
550
break;
551
#endif
552
default:
553
break;
554
}
555
*p = dp->conversion;
556
#if USE_SNPRINTF
557
p[1] = '%';
558
p[2] = 'n';
559
p[3] = '\0';
560
#else
561
p[1] = '\0';
562
#endif
563
564
/* Construct the arguments for calling snprintf or sprintf. */
565
prefix_count = 0;
566
if (dp->width_arg_index != ARG_NONE)
567
{
568
if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
569
abort ();
570
prefixes[prefix_count++] = a.arg[dp->width_arg_index].a.a_int;
571
}
572
if (dp->precision_arg_index != ARG_NONE)
573
{
574
if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
575
abort ();
576
prefixes[prefix_count++] = a.arg[dp->precision_arg_index].a.a_int;
577
}
578
579
#if USE_SNPRINTF
580
/* Prepare checking whether snprintf returns the count
581
via %n. */
582
ENSURE_ALLOCATION (xsum (length, 1));
583
result[length] = '\0';
584
#endif
585
586
for (;;)
587
{
588
size_t maxlen;
589
int count;
590
int retcount;
591
592
maxlen = allocated - length;
593
count = -1;
594
retcount = 0;
595
596
#if USE_SNPRINTF
597
# define SNPRINTF_BUF(arg) \
598
switch (prefix_count) \
599
{ \
600
case 0: \
601
retcount = SNPRINTF (result + length, maxlen, buf, \
602
arg, &count); \
603
break; \
604
case 1: \
605
retcount = SNPRINTF (result + length, maxlen, buf, \
606
prefixes[0], arg, &count); \
607
break; \
608
case 2: \
609
retcount = SNPRINTF (result + length, maxlen, buf, \
610
prefixes[0], prefixes[1], arg, \
611
&count); \
612
break; \
613
default: \
614
abort (); \
615
}
616
#else
617
# define SNPRINTF_BUF(arg) \
618
switch (prefix_count) \
619
{ \
620
case 0: \
621
count = sprintf (tmp, buf, arg); \
622
break; \
623
case 1: \
624
count = sprintf (tmp, buf, prefixes[0], arg); \
625
break; \
626
case 2: \
627
count = sprintf (tmp, buf, prefixes[0], prefixes[1],\
628
arg); \
629
break; \
630
default: \
631
abort (); \
632
}
633
#endif
634
635
switch (type)
636
{
637
case TYPE_SCHAR:
638
{
639
int arg = a.arg[dp->arg_index].a.a_schar;
640
SNPRINTF_BUF (arg);
641
}
642
break;
643
case TYPE_UCHAR:
644
{
645
unsigned int arg = a.arg[dp->arg_index].a.a_uchar;
646
SNPRINTF_BUF (arg);
647
}
648
break;
649
case TYPE_SHORT:
650
{
651
int arg = a.arg[dp->arg_index].a.a_short;
652
SNPRINTF_BUF (arg);
653
}
654
break;
655
case TYPE_USHORT:
656
{
657
unsigned int arg = a.arg[dp->arg_index].a.a_ushort;
658
SNPRINTF_BUF (arg);
659
}
660
break;
661
case TYPE_INT:
662
{
663
int arg = a.arg[dp->arg_index].a.a_int;
664
SNPRINTF_BUF (arg);
665
}
666
break;
667
case TYPE_UINT:
668
{
669
unsigned int arg = a.arg[dp->arg_index].a.a_uint;
670
SNPRINTF_BUF (arg);
671
}
672
break;
673
case TYPE_LONGINT:
674
{
675
long int arg = a.arg[dp->arg_index].a.a_longint;
676
SNPRINTF_BUF (arg);
677
}
678
break;
679
case TYPE_ULONGINT:
680
{
681
unsigned long int arg = a.arg[dp->arg_index].a.a_ulongint;
682
SNPRINTF_BUF (arg);
683
}
684
break;
685
#ifdef HAVE_LONG_LONG_INT
686
case TYPE_LONGLONGINT:
687
{
688
long long int arg = a.arg[dp->arg_index].a.a_longlongint;
689
SNPRINTF_BUF (arg);
690
}
691
break;
692
case TYPE_ULONGLONGINT:
693
{
694
unsigned long long int arg = a.arg[dp->arg_index].a.a_ulonglongint;
695
SNPRINTF_BUF (arg);
696
}
697
break;
698
#endif
699
case TYPE_DOUBLE:
700
{
701
double arg = a.arg[dp->arg_index].a.a_double;
702
SNPRINTF_BUF (arg);
703
}
704
break;
705
#ifdef HAVE_LONG_DOUBLE
706
case TYPE_LONGDOUBLE:
707
{
708
long double arg = a.arg[dp->arg_index].a.a_longdouble;
709
SNPRINTF_BUF (arg);
710
}
711
break;
712
#endif
713
case TYPE_CHAR:
714
{
715
int arg = a.arg[dp->arg_index].a.a_char;
716
SNPRINTF_BUF (arg);
717
}
718
break;
719
#ifdef HAVE_WINT_T
720
case TYPE_WIDE_CHAR:
721
{
722
wint_t arg = a.arg[dp->arg_index].a.a_wide_char;
723
SNPRINTF_BUF (arg);
724
}
725
break;
726
#endif
727
case TYPE_STRING:
728
{
729
const char *arg = a.arg[dp->arg_index].a.a_string;
730
SNPRINTF_BUF (arg);
731
}
732
break;
733
#ifdef HAVE_WCHAR_T
734
case TYPE_WIDE_STRING:
735
{
736
const wchar_t *arg = a.arg[dp->arg_index].a.a_wide_string;
737
SNPRINTF_BUF (arg);
738
}
739
break;
740
#endif
741
case TYPE_POINTER:
742
{
743
void *arg = a.arg[dp->arg_index].a.a_pointer;
744
SNPRINTF_BUF (arg);
745
}
746
break;
747
default:
748
abort ();
749
}
750
751
#if USE_SNPRINTF
752
/* Portability: Not all implementations of snprintf()
753
are ISO C 99 compliant. Determine the number of
754
bytes that snprintf() has produced or would have
755
produced. */
756
if (count >= 0)
757
{
758
/* Verify that snprintf() has NUL-terminated its
759
result. */
760
if (count < maxlen && result[length + count] != '\0')
761
abort ();
762
/* Portability hack. */
763
if (retcount > count)
764
count = retcount;
765
}
766
else
767
{
768
/* snprintf() doesn't understand the '%n'
769
directive. */
770
if (p[1] != '\0')
771
{
772
/* Don't use the '%n' directive; instead, look
773
at the snprintf() return value. */
774
p[1] = '\0';
775
continue;
776
}
777
else
778
{
779
/* Look at the snprintf() return value. */
780
if (retcount < 0)
781
{
782
/* HP-UX 10.20 snprintf() is doubly deficient:
783
It doesn't understand the '%n' directive,
784
*and* it returns -1 (rather than the length
785
that would have been required) when the
786
buffer is too small. */
787
size_t bigger_need =
788
xsum (xtimes (allocated, 2), 12);
789
ENSURE_ALLOCATION (bigger_need);
790
continue;
791
}
792
else
793
count = retcount;
794
}
795
}
796
#endif
797
798
/* Attempt to handle failure. */
799
if (count < 0)
800
{
801
if (!(result == resultbuf || result == NULL))
802
free (result);
803
if (buf_malloced != NULL)
804
free (buf_malloced);
805
CLEANUP ();
806
errno = EINVAL;
807
return NULL;
808
}
809
810
#if !USE_SNPRINTF
811
if (count >= tmp_length)
812
/* tmp_length was incorrectly calculated - fix the
813
code above! */
814
abort ();
815
#endif
816
817
/* Make room for the result. */
818
if (count >= maxlen)
819
{
820
/* Need at least count bytes. But allocate
821
proportionally, to avoid looping eternally if
822
snprintf() reports a too small count. */
823
size_t n =
824
xmax (xsum (length, count), xtimes (allocated, 2));
825
826
ENSURE_ALLOCATION (n);
827
#if USE_SNPRINTF
828
continue;
829
#endif
830
}
831
832
#if USE_SNPRINTF
833
/* The snprintf() result did fit. */
834
#else
835
/* Append the sprintf() result. */
836
memcpy (result + length, tmp, count * sizeof (CHAR_T));
837
if (tmp != tmpbuf)
838
free (tmp);
839
#endif
840
841
length += count;
842
break;
843
}
844
}
845
}
846
}
847
848
/* Add the final NUL. */
849
ENSURE_ALLOCATION (xsum (length, 1));
850
result[length] = '\0';
851
852
if (result != resultbuf && length + 1 < allocated)
853
{
854
/* Shrink the allocated memory if possible. */
855
CHAR_T *memory;
856
857
memory = (CHAR_T *) realloc (result, (length + 1) * sizeof (CHAR_T));
858
if (memory != NULL)
859
result = memory;
860
}
861
862
if (buf_malloced != NULL)
863
free (buf_malloced);
864
CLEANUP ();
865
*lengthp = length;
866
/* Note that we can produce a big string of a length > INT_MAX. POSIX
867
says that snprintf() fails with errno = EOVERFLOW in this case, but
868
that's only because snprintf() returns an 'int'. This function does
869
not have this limitation. */
870
return result;
871
872
out_of_memory:
873
if (!(result == resultbuf || result == NULL))
874
free (result);
875
if (buf_malloced != NULL)
876
free (buf_malloced);
877
out_of_memory_1:
878
CLEANUP ();
879
errno = ENOMEM;
880
return NULL;
881
}
882
}
883
884
#undef SNPRINTF
885
#undef USE_SNPRINTF
886
#undef PRINTF_PARSE
887
#undef DIRECTIVES
888
#undef DIRECTIVE
889
#undef CHAR_T
890
#undef VASNPRINTF
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Version: 2.0.1