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- Committer: Arnold D. Robbins
- Date: 2010-07-16 11:47:02 UTC
- Revision ID: git-v1:315bd501ca696bc3e3c938b4604d8dac7a6f512f
Tags: gawk-3.1.5
Move to gawk 3.1.5.
- files added:
- README_d/README.cygwin-dynamic
- files removed:
- bisonfix.sed
- intl
- files modified:
- ABOUT-NLS
added
removed
intl/vasnprintf.c
1
/* vsprintf with automatic memory allocation.
2
Copyright (C) 1999, 2002-2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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
#ifdef HAVE_CONFIG_H
27
# include <config.h>
28
#endif
29
#ifndef IN_LIBINTL
30
# include <alloca.h>
31
#endif
32
33
/* Specification. */
34
#if WIDE_CHAR_VERSION
35
# include "vasnwprintf.h"
36
#else
37
# include "vasnprintf.h"
38
#endif
39
40
#include <stdio.h> /* snprintf(), sprintf() */
41
#include <stdlib.h> /* abort(), malloc(), realloc(), free() */
42
#include <string.h> /* memcpy(), strlen() */
43
#include <errno.h> /* errno */
44
#include <limits.h> /* CHAR_BIT */
45
#include <float.h> /* DBL_MAX_EXP, LDBL_MAX_EXP */
46
#if WIDE_CHAR_VERSION
47
# include "wprintf-parse.h"
48
#else
49
# include "printf-parse.h"
50
#endif
51
52
/* Checked size_t computations. */
53
#include "xsize.h"
54
55
#ifdef HAVE_WCHAR_T
56
# ifdef HAVE_WCSLEN
57
# define local_wcslen wcslen
58
# else
59
/* Solaris 2.5.1 has wcslen() in a separate library libw.so. To avoid
60
a dependency towards this library, here is a local substitute.
61
Define this substitute only once, even if this file is included
62
twice in the same compilation unit. */
63
# ifndef local_wcslen_defined
64
# define local_wcslen_defined 1
65
static size_t
66
local_wcslen (const wchar_t *s)
67
{
68
const wchar_t *ptr;
69
70
for (ptr = s; *ptr != (wchar_t) 0; ptr++)
71
;
72
return ptr - s;
73
}
74
# endif
75
# endif
76
#endif
77
78
#if WIDE_CHAR_VERSION
79
# define VASNPRINTF vasnwprintf
80
# define CHAR_T wchar_t
81
# define DIRECTIVE wchar_t_directive
82
# define DIRECTIVES wchar_t_directives
83
# define PRINTF_PARSE wprintf_parse
84
# define USE_SNPRINTF 1
85
# if HAVE_DECL__SNWPRINTF
86
/* On Windows, the function swprintf() has a different signature than
87
on Unix; we use the _snwprintf() function instead. */
88
# define SNPRINTF _snwprintf
89
# else
90
/* Unix. */
91
# define SNPRINTF swprintf
92
# endif
93
#else
94
# define VASNPRINTF vasnprintf
95
# define CHAR_T char
96
# define DIRECTIVE char_directive
97
# define DIRECTIVES char_directives
98
# define PRINTF_PARSE printf_parse
99
# define USE_SNPRINTF (HAVE_DECL__SNPRINTF || HAVE_SNPRINTF)
100
# if HAVE_DECL__SNPRINTF
101
/* Windows. */
102
# define SNPRINTF _snprintf
103
# else
104
/* Unix. */
105
# define SNPRINTF snprintf
106
# endif
107
#endif
108
109
CHAR_T *
110
VASNPRINTF (CHAR_T *resultbuf, size_t *lengthp, const CHAR_T *format, va_list args)
111
{
112
DIRECTIVES d;
113
arguments a;
114
115
if (PRINTF_PARSE (format, &d, &a) < 0)
116
{
117
errno = EINVAL;
118
return NULL;
119
}
120
121
#define CLEANUP() \
122
free (d.dir); \
123
if (a.arg) \
124
free (a.arg);
125
126
if (printf_fetchargs (args, &a) < 0)
127
{
128
CLEANUP ();
129
errno = EINVAL;
130
return NULL;
131
}
132
133
{
134
size_t buf_neededlength;
135
CHAR_T *buf;
136
CHAR_T *buf_malloced;
137
const CHAR_T *cp;
138
size_t i;
139
DIRECTIVE *dp;
140
/* Output string accumulator. */
141
CHAR_T *result;
142
size_t allocated;
143
size_t length;
144
145
/* Allocate a small buffer that will hold a directive passed to
146
sprintf or snprintf. */
147
buf_neededlength =
148
xsum4 (7, d.max_width_length, d.max_precision_length, 6);
149
#if HAVE_ALLOCA
150
if (buf_neededlength < 4000 / sizeof (CHAR_T))
151
{
152
buf = (CHAR_T *) alloca (buf_neededlength * sizeof (CHAR_T));
153
buf_malloced = NULL;
154
}
155
else
156
#endif
157
{
158
size_t buf_memsize = xtimes (buf_neededlength, sizeof (CHAR_T));
159
if (size_overflow_p (buf_memsize))
160
goto out_of_memory_1;
161
buf = (CHAR_T *) malloc (buf_memsize);
162
if (buf == NULL)
163
goto out_of_memory_1;
164
buf_malloced = buf;
165
}
166
167
if (resultbuf != NULL)
168
{
169
result = resultbuf;
170
allocated = *lengthp;
171
}
172
else
173
{
174
result = NULL;
175
allocated = 0;
176
}
177
length = 0;
178
/* Invariants:
179
result is either == resultbuf or == NULL or malloc-allocated.
180
If length > 0, then result != NULL. */
181
182
/* Ensures that allocated >= needed. Aborts through a jump to
183
out_of_memory if needed is SIZE_MAX or otherwise too big. */
184
#define ENSURE_ALLOCATION(needed) \
185
if ((needed) > allocated) \
186
{ \
187
size_t memory_size; \
188
CHAR_T *memory; \
189
\
190
allocated = (allocated > 0 ? xtimes (allocated, 2) : 12); \
191
if ((needed) > allocated) \
192
allocated = (needed); \
193
memory_size = xtimes (allocated, sizeof (CHAR_T)); \
194
if (size_overflow_p (memory_size)) \
195
goto out_of_memory; \
196
if (result == resultbuf || result == NULL) \
197
memory = (CHAR_T *) malloc (memory_size); \
198
else \
199
memory = (CHAR_T *) realloc (result, memory_size); \
200
if (memory == NULL) \
201
goto out_of_memory; \
202
if (result == resultbuf && length > 0) \
203
memcpy (memory, result, length * sizeof (CHAR_T)); \
204
result = memory; \
205
}
206
207
for (cp = format, i = 0, dp = &d.dir[0]; ; cp = dp->dir_end, i++, dp++)
208
{
209
if (cp != dp->dir_start)
210
{
211
size_t n = dp->dir_start - cp;
212
size_t augmented_length = xsum (length, n);
213
214
ENSURE_ALLOCATION (augmented_length);
215
memcpy (result + length, cp, n * sizeof (CHAR_T));
216
length = augmented_length;
217
}
218
if (i == d.count)
219
break;
220
221
/* Execute a single directive. */
222
if (dp->conversion == '%')
223
{
224
size_t augmented_length;
225
226
if (!(dp->arg_index == ARG_NONE))
227
abort ();
228
augmented_length = xsum (length, 1);
229
ENSURE_ALLOCATION (augmented_length);
230
result[length] = '%';
231
length = augmented_length;
232
}
233
else
234
{
235
if (!(dp->arg_index != ARG_NONE))
236
abort ();
237
238
if (dp->conversion == 'n')
239
{
240
switch (a.arg[dp->arg_index].type)
241
{
242
case TYPE_COUNT_SCHAR_POINTER:
243
*a.arg[dp->arg_index].a.a_count_schar_pointer = length;
244
break;
245
case TYPE_COUNT_SHORT_POINTER:
246
*a.arg[dp->arg_index].a.a_count_short_pointer = length;
247
break;
248
case TYPE_COUNT_INT_POINTER:
249
*a.arg[dp->arg_index].a.a_count_int_pointer = length;
250
break;
251
case TYPE_COUNT_LONGINT_POINTER:
252
*a.arg[dp->arg_index].a.a_count_longint_pointer = length;
253
break;
254
#ifdef HAVE_LONG_LONG
255
case TYPE_COUNT_LONGLONGINT_POINTER:
256
*a.arg[dp->arg_index].a.a_count_longlongint_pointer = length;
257
break;
258
#endif
259
default:
260
abort ();
261
}
262
}
263
else
264
{
265
arg_type type = a.arg[dp->arg_index].type;
266
CHAR_T *p;
267
unsigned int prefix_count;
268
int prefixes[2];
269
#if !USE_SNPRINTF
270
size_t tmp_length;
271
CHAR_T tmpbuf[700];
272
CHAR_T *tmp;
273
274
/* Allocate a temporary buffer of sufficient size for calling
275
sprintf. */
276
{
277
size_t width;
278
size_t precision;
279
280
width = 0;
281
if (dp->width_start != dp->width_end)
282
{
283
if (dp->width_arg_index != ARG_NONE)
284
{
285
int arg;
286
287
if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
288
abort ();
289
arg = a.arg[dp->width_arg_index].a.a_int;
290
width = (arg < 0 ? (unsigned int) (-arg) : arg);
291
}
292
else
293
{
294
const CHAR_T *digitp = dp->width_start;
295
296
do
297
width = xsum (xtimes (width, 10), *digitp++ - '0');
298
while (digitp != dp->width_end);
299
}
300
}
301
302
precision = 6;
303
if (dp->precision_start != dp->precision_end)
304
{
305
if (dp->precision_arg_index != ARG_NONE)
306
{
307
int arg;
308
309
if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
310
abort ();
311
arg = a.arg[dp->precision_arg_index].a.a_int;
312
precision = (arg < 0 ? 0 : arg);
313
}
314
else
315
{
316
const CHAR_T *digitp = dp->precision_start + 1;
317
318
precision = 0;
319
do
320
precision = xsum (xtimes (precision, 10), *digitp++ - '0');
321
while (digitp != dp->precision_end);
322
}
323
}
324
325
switch (dp->conversion)
326
{
327
328
case 'd': case 'i': case 'u':
329
# ifdef HAVE_LONG_LONG
330
if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
331
tmp_length =
332
(unsigned int) (sizeof (unsigned long long) * CHAR_BIT
333
* 0.30103 /* binary -> decimal */
334
* 2 /* estimate for FLAG_GROUP */
335
)
336
+ 1 /* turn floor into ceil */
337
+ 1; /* account for leading sign */
338
else
339
# endif
340
if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
341
tmp_length =
342
(unsigned int) (sizeof (unsigned long) * CHAR_BIT
343
* 0.30103 /* binary -> decimal */
344
* 2 /* estimate for FLAG_GROUP */
345
)
346
+ 1 /* turn floor into ceil */
347
+ 1; /* account for leading sign */
348
else
349
tmp_length =
350
(unsigned int) (sizeof (unsigned int) * CHAR_BIT
351
* 0.30103 /* binary -> decimal */
352
* 2 /* estimate for FLAG_GROUP */
353
)
354
+ 1 /* turn floor into ceil */
355
+ 1; /* account for leading sign */
356
break;
357
358
case 'o':
359
# ifdef HAVE_LONG_LONG
360
if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
361
tmp_length =
362
(unsigned int) (sizeof (unsigned long long) * CHAR_BIT
363
* 0.333334 /* binary -> octal */
364
)
365
+ 1 /* turn floor into ceil */
366
+ 1; /* account for leading sign */
367
else
368
# endif
369
if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
370
tmp_length =
371
(unsigned int) (sizeof (unsigned long) * CHAR_BIT
372
* 0.333334 /* binary -> octal */
373
)
374
+ 1 /* turn floor into ceil */
375
+ 1; /* account for leading sign */
376
else
377
tmp_length =
378
(unsigned int) (sizeof (unsigned int) * CHAR_BIT
379
* 0.333334 /* binary -> octal */
380
)
381
+ 1 /* turn floor into ceil */
382
+ 1; /* account for leading sign */
383
break;
384
385
case 'x': case 'X':
386
# ifdef HAVE_LONG_LONG
387
if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
388
tmp_length =
389
(unsigned int) (sizeof (unsigned long long) * CHAR_BIT
390
* 0.25 /* binary -> hexadecimal */
391
)
392
+ 1 /* turn floor into ceil */
393
+ 2; /* account for leading sign or alternate form */
394
else
395
# endif
396
if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
397
tmp_length =
398
(unsigned int) (sizeof (unsigned long) * CHAR_BIT
399
* 0.25 /* binary -> hexadecimal */
400
)
401
+ 1 /* turn floor into ceil */
402
+ 2; /* account for leading sign or alternate form */
403
else
404
tmp_length =
405
(unsigned int) (sizeof (unsigned int) * CHAR_BIT
406
* 0.25 /* binary -> hexadecimal */
407
)
408
+ 1 /* turn floor into ceil */
409
+ 2; /* account for leading sign or alternate form */
410
break;
411
412
case 'f': case 'F':
413
# ifdef HAVE_LONG_DOUBLE
414
if (type == TYPE_LONGDOUBLE)
415
tmp_length =
416
(unsigned int) (LDBL_MAX_EXP
417
* 0.30103 /* binary -> decimal */
418
* 2 /* estimate for FLAG_GROUP */
419
)
420
+ 1 /* turn floor into ceil */
421
+ 10; /* sign, decimal point etc. */
422
else
423
# endif
424
tmp_length =
425
(unsigned int) (DBL_MAX_EXP
426
* 0.30103 /* binary -> decimal */
427
* 2 /* estimate for FLAG_GROUP */
428
)
429
+ 1 /* turn floor into ceil */
430
+ 10; /* sign, decimal point etc. */
431
tmp_length = xsum (tmp_length, precision);
432
break;
433
434
case 'e': case 'E': case 'g': case 'G':
435
case 'a': case 'A':
436
tmp_length =
437
12; /* sign, decimal point, exponent etc. */
438
tmp_length = xsum (tmp_length, precision);
439
break;
440
441
case 'c':
442
# if defined HAVE_WINT_T && !WIDE_CHAR_VERSION
443
if (type == TYPE_WIDE_CHAR)
444
tmp_length = MB_CUR_MAX;
445
else
446
# endif
447
tmp_length = 1;
448
break;
449
450
case 's':
451
# ifdef HAVE_WCHAR_T
452
if (type == TYPE_WIDE_STRING)
453
{
454
tmp_length =
455
local_wcslen (a.arg[dp->arg_index].a.a_wide_string);
456
457
# if !WIDE_CHAR_VERSION
458
tmp_length = xtimes (tmp_length, MB_CUR_MAX);
459
# endif
460
}
461
else
462
# endif
463
tmp_length = strlen (a.arg[dp->arg_index].a.a_string);
464
break;
465
466
case 'p':
467
tmp_length =
468
(unsigned int) (sizeof (void *) * CHAR_BIT
469
* 0.25 /* binary -> hexadecimal */
470
)
471
+ 1 /* turn floor into ceil */
472
+ 2; /* account for leading 0x */
473
break;
474
475
default:
476
abort ();
477
}
478
479
if (tmp_length < width)
480
tmp_length = width;
481
482
tmp_length = xsum (tmp_length, 1); /* account for trailing NUL */
483
}
484
485
if (tmp_length <= sizeof (tmpbuf) / sizeof (CHAR_T))
486
tmp = tmpbuf;
487
else
488
{
489
size_t tmp_memsize = xtimes (tmp_length, sizeof (CHAR_T));
490
491
if (size_overflow_p (tmp_memsize))
492
/* Overflow, would lead to out of memory. */
493
goto out_of_memory;
494
tmp = (CHAR_T *) malloc (tmp_memsize);
495
if (tmp == NULL)
496
/* Out of memory. */
497
goto out_of_memory;
498
}
499
#endif
500
501
/* Construct the format string for calling snprintf or
502
sprintf. */
503
p = buf;
504
*p++ = '%';
505
if (dp->flags & FLAG_GROUP)
506
*p++ = '\'';
507
if (dp->flags & FLAG_LEFT)
508
*p++ = '-';
509
if (dp->flags & FLAG_SHOWSIGN)
510
*p++ = '+';
511
if (dp->flags & FLAG_SPACE)
512
*p++ = ' ';
513
if (dp->flags & FLAG_ALT)
514
*p++ = '#';
515
if (dp->flags & FLAG_ZERO)
516
*p++ = '0';
517
if (dp->width_start != dp->width_end)
518
{
519
size_t n = dp->width_end - dp->width_start;
520
memcpy (p, dp->width_start, n * sizeof (CHAR_T));
521
p += n;
522
}
523
if (dp->precision_start != dp->precision_end)
524
{
525
size_t n = dp->precision_end - dp->precision_start;
526
memcpy (p, dp->precision_start, n * sizeof (CHAR_T));
527
p += n;
528
}
529
530
switch (type)
531
{
532
#ifdef HAVE_LONG_LONG
533
case TYPE_LONGLONGINT:
534
case TYPE_ULONGLONGINT:
535
*p++ = 'l';
536
/*FALLTHROUGH*/
537
#endif
538
case TYPE_LONGINT:
539
case TYPE_ULONGINT:
540
#ifdef HAVE_WINT_T
541
case TYPE_WIDE_CHAR:
542
#endif
543
#ifdef HAVE_WCHAR_T
544
case TYPE_WIDE_STRING:
545
#endif
546
*p++ = 'l';
547
break;
548
#ifdef HAVE_LONG_DOUBLE
549
case TYPE_LONGDOUBLE:
550
*p++ = 'L';
551
break;
552
#endif
553
default:
554
break;
555
}
556
*p = dp->conversion;
557
#if USE_SNPRINTF
558
p[1] = '%';
559
p[2] = 'n';
560
p[3] = '\0';
561
#else
562
p[1] = '\0';
563
#endif
564
565
/* Construct the arguments for calling snprintf or sprintf. */
566
prefix_count = 0;
567
if (dp->width_arg_index != ARG_NONE)
568
{
569
if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
570
abort ();
571
prefixes[prefix_count++] = a.arg[dp->width_arg_index].a.a_int;
572
}
573
if (dp->precision_arg_index != ARG_NONE)
574
{
575
if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
576
abort ();
577
prefixes[prefix_count++] = a.arg[dp->precision_arg_index].a.a_int;
578
}
579
580
#if USE_SNPRINTF
581
/* Prepare checking whether snprintf returns the count
582
via %n. */
583
ENSURE_ALLOCATION (xsum (length, 1));
584
result[length] = '\0';
585
#endif
586
587
for (;;)
588
{
589
size_t maxlen;
590
int count;
591
int retcount;
592
593
maxlen = allocated - length;
594
count = -1;
595
retcount = 0;
596
597
#if USE_SNPRINTF
598
# define SNPRINTF_BUF(arg) \
599
switch (prefix_count) \
600
{ \
601
case 0: \
602
retcount = SNPRINTF (result + length, maxlen, buf, \
603
arg, &count); \
604
break; \
605
case 1: \
606
retcount = SNPRINTF (result + length, maxlen, buf, \
607
prefixes[0], arg, &count); \
608
break; \
609
case 2: \
610
retcount = SNPRINTF (result + length, maxlen, buf, \
611
prefixes[0], prefixes[1], arg, \
612
&count); \
613
break; \
614
default: \
615
abort (); \
616
}
617
#else
618
# define SNPRINTF_BUF(arg) \
619
switch (prefix_count) \
620
{ \
621
case 0: \
622
count = sprintf (tmp, buf, arg); \
623
break; \
624
case 1: \
625
count = sprintf (tmp, buf, prefixes[0], arg); \
626
break; \
627
case 2: \
628
count = sprintf (tmp, buf, prefixes[0], prefixes[1],\
629
arg); \
630
break; \
631
default: \
632
abort (); \
633
}
634
#endif
635
636
switch (type)
637
{
638
case TYPE_SCHAR:
639
{
640
int arg = a.arg[dp->arg_index].a.a_schar;
641
SNPRINTF_BUF (arg);
642
}
643
break;
644
case TYPE_UCHAR:
645
{
646
unsigned int arg = a.arg[dp->arg_index].a.a_uchar;
647
SNPRINTF_BUF (arg);
648
}
649
break;
650
case TYPE_SHORT:
651
{
652
int arg = a.arg[dp->arg_index].a.a_short;
653
SNPRINTF_BUF (arg);
654
}
655
break;
656
case TYPE_USHORT:
657
{
658
unsigned int arg = a.arg[dp->arg_index].a.a_ushort;
659
SNPRINTF_BUF (arg);
660
}
661
break;
662
case TYPE_INT:
663
{
664
int arg = a.arg[dp->arg_index].a.a_int;
665
SNPRINTF_BUF (arg);
666
}
667
break;
668
case TYPE_UINT:
669
{
670
unsigned int arg = a.arg[dp->arg_index].a.a_uint;
671
SNPRINTF_BUF (arg);
672
}
673
break;
674
case TYPE_LONGINT:
675
{
676
long int arg = a.arg[dp->arg_index].a.a_longint;
677
SNPRINTF_BUF (arg);
678
}
679
break;
680
case TYPE_ULONGINT:
681
{
682
unsigned long int arg = a.arg[dp->arg_index].a.a_ulongint;
683
SNPRINTF_BUF (arg);
684
}
685
break;
686
#ifdef HAVE_LONG_LONG
687
case TYPE_LONGLONGINT:
688
{
689
long long int arg = a.arg[dp->arg_index].a.a_longlongint;
690
SNPRINTF_BUF (arg);
691
}
692
break;
693
case TYPE_ULONGLONGINT:
694
{
695
unsigned long long int arg = a.arg[dp->arg_index].a.a_ulonglongint;
696
SNPRINTF_BUF (arg);
697
}
698
break;
699
#endif
700
case TYPE_DOUBLE:
701
{
702
double arg = a.arg[dp->arg_index].a.a_double;
703
SNPRINTF_BUF (arg);
704
}
705
break;
706
#ifdef HAVE_LONG_DOUBLE
707
case TYPE_LONGDOUBLE:
708
{
709
long double arg = a.arg[dp->arg_index].a.a_longdouble;
710
SNPRINTF_BUF (arg);
711
}
712
break;
713
#endif
714
case TYPE_CHAR:
715
{
716
int arg = a.arg[dp->arg_index].a.a_char;
717
SNPRINTF_BUF (arg);
718
}
719
break;
720
#ifdef HAVE_WINT_T
721
case TYPE_WIDE_CHAR:
722
{
723
wint_t arg = a.arg[dp->arg_index].a.a_wide_char;
724
SNPRINTF_BUF (arg);
725
}
726
break;
727
#endif
728
case TYPE_STRING:
729
{
730
const char *arg = a.arg[dp->arg_index].a.a_string;
731
SNPRINTF_BUF (arg);
732
}
733
break;
734
#ifdef HAVE_WCHAR_T
735
case TYPE_WIDE_STRING:
736
{
737
const wchar_t *arg = a.arg[dp->arg_index].a.a_wide_string;
738
SNPRINTF_BUF (arg);
739
}
740
break;
741
#endif
742
case TYPE_POINTER:
743
{
744
void *arg = a.arg[dp->arg_index].a.a_pointer;
745
SNPRINTF_BUF (arg);
746
}
747
break;
748
default:
749
abort ();
750
}
751
752
#if USE_SNPRINTF
753
/* Portability: Not all implementations of snprintf()
754
are ISO C 99 compliant. Determine the number of
755
bytes that snprintf() has produced or would have
756
produced. */
757
if (count >= 0)
758
{
759
/* Verify that snprintf() has NUL-terminated its
760
result. */
761
if (count < maxlen && result[length + count] != '\0')
762
abort ();
763
/* Portability hack. */
764
if (retcount > count)
765
count = retcount;
766
}
767
else
768
{
769
/* snprintf() doesn't understand the '%n'
770
directive. */
771
if (p[1] != '\0')
772
{
773
/* Don't use the '%n' directive; instead, look
774
at the snprintf() return value. */
775
p[1] = '\0';
776
continue;
777
}
778
else
779
{
780
/* Look at the snprintf() return value. */
781
if (retcount < 0)
782
{
783
/* HP-UX 10.20 snprintf() is doubly deficient:
784
It doesn't understand the '%n' directive,
785
*and* it returns -1 (rather than the length
786
that would have been required) when the
787
buffer is too small. */
788
size_t bigger_need =
789
xsum (xtimes (allocated, 2), 12);
790
ENSURE_ALLOCATION (bigger_need);
791
continue;
792
}
793
else
794
count = retcount;
795
}
796
}
797
#endif
798
799
/* Attempt to handle failure. */
800
if (count < 0)
801
{
802
if (!(result == resultbuf || result == NULL))
803
free (result);
804
if (buf_malloced != NULL)
805
free (buf_malloced);
806
CLEANUP ();
807
errno = EINVAL;
808
return NULL;
809
}
810
811
#if !USE_SNPRINTF
812
if (count >= tmp_length)
813
/* tmp_length was incorrectly calculated - fix the
814
code above! */
815
abort ();
816
#endif
817
818
/* Make room for the result. */
819
if (count >= maxlen)
820
{
821
/* Need at least count bytes. But allocate
822
proportionally, to avoid looping eternally if
823
snprintf() reports a too small count. */
824
size_t n =
825
xmax (xsum (length, count), xtimes (allocated, 2));
826
827
ENSURE_ALLOCATION (n);
828
#if USE_SNPRINTF
829
continue;
830
#endif
831
}
832
833
#if USE_SNPRINTF
834
/* The snprintf() result did fit. */
835
#else
836
/* Append the sprintf() result. */
837
memcpy (result + length, tmp, count * sizeof (CHAR_T));
838
if (tmp != tmpbuf)
839
free (tmp);
840
#endif
841
842
length += count;
843
break;
844
}
845
}
846
}
847
}
848
849
/* Add the final NUL. */
850
ENSURE_ALLOCATION (xsum (length, 1));
851
result[length] = '\0';
852
853
if (result != resultbuf && length + 1 < allocated)
854
{
855
/* Shrink the allocated memory if possible. */
856
CHAR_T *memory;
857
858
memory = (CHAR_T *) realloc (result, (length + 1) * sizeof (CHAR_T));
859
if (memory != NULL)
860
result = memory;
861
}
862
863
if (buf_malloced != NULL)
864
free (buf_malloced);
865
CLEANUP ();
866
*lengthp = length;
867
return result;
868
869
out_of_memory:
870
if (!(result == resultbuf || result == NULL))
871
free (result);
872
if (buf_malloced != NULL)
873
free (buf_malloced);
874
out_of_memory_1:
875
CLEANUP ();
876
errno = ENOMEM;
877
return NULL;
878
}
879
}
880
881
#undef SNPRINTF
882
#undef USE_SNPRINTF
883
#undef PRINTF_PARSE
884
#undef DIRECTIVES
885
#undef DIRECTIVE
886
#undef CHAR_T
887
#undef VASNPRINTF
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Version: 2.0.1