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- Committer: Bazaar Package Importer
- Author(s): Guido Trotter
- Date: 2004-06-15 15:37:48 UTC
- Revision ID: james.westby@ubuntu.com-20040615153748-pq7702qdzghqfcns
Tags: upstream-1.3.1.0
Import upstream version 1.3.1.0
- files added:
- contrib
- contrib/aix
- contrib/tarballs
- lib
- plugins
- plugins-scripts
- plugins-scripts/t
- plugins/t
added
removed
plugins/snprintf.c
1
/*
2
* Copyright Patrick Powell 1995
3
* This code is based on code written by Patrick Powell (papowell@astart.com)
4
* It may be used for any purpose as long as this notice remains intact
5
* on all source code distributions
6
*/
7
8
/**************************************************************
9
* Original:
10
* Patrick Powell Tue Apr 11 09:48:21 PDT 1995
11
* A bombproof version of doprnt (dopr) included.
12
* Sigh. This sort of thing is always nasty do deal with. Note that
13
* the version here does not include floating point...
14
*
15
* snprintf() is used instead of sprintf() as it does limit checks
16
* for string length. This covers a nasty loophole.
17
*
18
* The other functions are there to prevent NULL pointers from
19
* causing nast effects.
20
*
21
* More Recently:
22
* Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
23
* This was ugly. It is still ugly. I opted out of floating point
24
* numbers, but the formatter understands just about everything
25
* from the normal C string format, at least as far as I can tell from
26
* the Solaris 2.5 printf(3S) man page.
27
*
28
* Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
29
* Ok, added some minimal floating point support, which means this
30
* probably requires libm on most operating systems. Don't yet
31
* support the exponent (e,E) and sigfig (g,G). Also, fmtint()
32
* was pretty badly broken, it just wasn't being exercised in ways
33
* which showed it, so that's been fixed. Also, formated the code
34
* to mutt conventions, and removed dead code left over from the
35
* original. Also, there is now a builtin-test, just compile with:
36
* gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
37
* and run snprintf for results.
38
*
39
* Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
40
* The PGP code was using unsigned hexadecimal formats.
41
* Unfortunately, unsigned formats simply didn't work.
42
*
43
* Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
44
* The original code assumed that both snprintf() and vsnprintf() were
45
* missing. Some systems only have snprintf() but not vsnprintf(), so
46
* the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
47
*
48
* Andrew Tridgell (tridge@samba.org) Oct 1998
49
* fixed handling of %.0f
50
* added test for HAVE_LONG_DOUBLE
51
*
52
* tridge@samba.org, idra@samba.org, April 2001
53
* got rid of fcvt code (twas buggy and made testing harder)
54
* added C99 semantics
55
*
56
**************************************************************/
57
58
#ifndef NO_CONFIG_H /* for some tests */
59
#include "config.h"
60
#else
61
#define NULL 0
62
#endif
63
64
#ifdef TEST_SNPRINTF /* need math library headers for testing */
65
#include <math.h>
66
#endif
67
68
#ifdef HAVE_STRING_H
69
#include <string.h>
70
#endif
71
72
#ifdef HAVE_STRINGS_H
73
#include <strings.h>
74
#endif
75
#ifdef HAVE_CTYPE_H
76
#include <ctype.h>
77
#endif
78
#ifdef HAVE_SYS_TYPES_H
79
#include <sys/types.h>
80
#endif
81
#ifdef HAVE_STDARG_H
82
#include <stdarg.h>
83
#endif
84
#ifdef HAVE_STDLIB_H
85
#include <stdlib.h>
86
#endif
87
88
#if defined(HAVE_SNPRINTF) && defined(HAVE_VSNPRINTF) && defined(HAVE_C99_VSNPRINTF)
89
/* only include stdio.h if we are not re-defining snprintf or vsnprintf */
90
#include <stdio.h>
91
/* make the compiler happy with an empty file */
92
void dummy_snprintf(void) {}
93
#else
94
95
#ifdef HAVE_LONG_DOUBLE
96
#define LDOUBLE long double
97
#else
98
#define LDOUBLE double
99
#endif
100
101
#ifdef HAVE_LONG_LONG
102
#define LLONG long long
103
#else
104
#define LLONG long
105
#endif
106
107
/* free memory if the pointer is valid and zero the pointer */
108
#ifndef SAFE_FREE
109
#define SAFE_FREE(x) do { if ((x) != NULL) {free((x)); (x)=NULL;} } while(0)
110
#endif
111
112
#ifndef VA_COPY
113
#ifdef HAVE_VA_COPY
114
#define VA_COPY(dest, src) __va_copy(dest, src)
115
#else
116
#define VA_COPY(dest, src) (dest) = (src)
117
#endif
118
#endif
119
120
static size_t dopr(char *buffer, size_t maxlen, const char *format,
121
va_list args_in);
122
static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
123
char *value, int flags, int min, int max);
124
static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
125
long value, int base, int min, int max, int flags);
126
static void fmtfp(char *buffer, size_t *currlen, size_t maxlen,
127
LDOUBLE fvalue, int min, int max, int flags);
128
static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c);
129
130
/*
131
* dopr(): poor man's version of doprintf
132
*/
133
134
/* format read states */
135
#define DP_S_DEFAULT 0
136
#define DP_S_FLAGS 1
137
#define DP_S_MIN 2
138
#define DP_S_DOT 3
139
#define DP_S_MAX 4
140
#define DP_S_MOD 5
141
#define DP_S_CONV 6
142
#define DP_S_DONE 7
143
144
/* format flags - Bits */
145
#define DP_F_MINUS (1 << 0)
146
#define DP_F_PLUS (1 << 1)
147
#define DP_F_SPACE (1 << 2)
148
#define DP_F_NUM (1 << 3)
149
#define DP_F_ZERO (1 << 4)
150
#define DP_F_UP (1 << 5)
151
#define DP_F_UNSIGNED (1 << 6)
152
153
/* Conversion Flags */
154
#define DP_C_SHORT 1
155
#define DP_C_LONG 2
156
#define DP_C_LDOUBLE 3
157
#define DP_C_LLONG 4
158
159
#define char_to_int(p) ((p)- '0')
160
#ifndef MAX
161
#define MAX(p,q) (((p) >= (q)) ? (p) : (q))
162
#endif
163
164
static size_t dopr(char *buffer, size_t maxlen, const char *format, va_list args_in)
165
{
166
char ch;
167
LLONG value;
168
LDOUBLE fvalue;
169
char *strvalue;
170
int min;
171
int max;
172
int state;
173
int flags;
174
int cflags;
175
size_t currlen;
176
va_list args;
177
178
VA_COPY(args, args_in);
179
180
state = DP_S_DEFAULT;
181
currlen = flags = cflags = min = 0;
182
max = -1;
183
ch = *format++;
184
185
while (state != DP_S_DONE) {
186
if (ch == '\0')
187
state = DP_S_DONE;
188
189
switch(state) {
190
case DP_S_DEFAULT:
191
if (ch == '%')
192
state = DP_S_FLAGS;
193
else
194
dopr_outch (buffer, &currlen, maxlen, ch);
195
ch = *format++;
196
break;
197
case DP_S_FLAGS:
198
switch (ch) {
199
case '-':
200
flags |= DP_F_MINUS;
201
ch = *format++;
202
break;
203
case '+':
204
flags |= DP_F_PLUS;
205
ch = *format++;
206
break;
207
case ' ':
208
flags |= DP_F_SPACE;
209
ch = *format++;
210
break;
211
case '#':
212
flags |= DP_F_NUM;
213
ch = *format++;
214
break;
215
case '0':
216
flags |= DP_F_ZERO;
217
ch = *format++;
218
break;
219
default:
220
state = DP_S_MIN;
221
break;
222
}
223
break;
224
case DP_S_MIN:
225
if (isdigit((unsigned char)ch)) {
226
min = 10*min + char_to_int (ch);
227
ch = *format++;
228
} else if (ch == '*') {
229
min = va_arg (args, int);
230
ch = *format++;
231
state = DP_S_DOT;
232
} else {
233
state = DP_S_DOT;
234
}
235
break;
236
case DP_S_DOT:
237
if (ch == '.') {
238
state = DP_S_MAX;
239
ch = *format++;
240
} else {
241
state = DP_S_MOD;
242
}
243
break;
244
case DP_S_MAX:
245
if (isdigit((unsigned char)ch)) {
246
if (max < 0)
247
max = 0;
248
max = 10*max + char_to_int (ch);
249
ch = *format++;
250
} else if (ch == '*') {
251
max = va_arg (args, int);
252
ch = *format++;
253
state = DP_S_MOD;
254
} else {
255
state = DP_S_MOD;
256
}
257
break;
258
case DP_S_MOD:
259
switch (ch) {
260
case 'h':
261
cflags = DP_C_SHORT;
262
ch = *format++;
263
break;
264
case 'l':
265
cflags = DP_C_LONG;
266
ch = *format++;
267
if (ch == 'l') { /* It's a long long */
268
cflags = DP_C_LLONG;
269
ch = *format++;
270
}
271
break;
272
case 'L':
273
cflags = DP_C_LDOUBLE;
274
ch = *format++;
275
break;
276
default:
277
break;
278
}
279
state = DP_S_CONV;
280
break;
281
case DP_S_CONV:
282
switch (ch) {
283
case 'd':
284
case 'i':
285
if (cflags == DP_C_SHORT)
286
value = va_arg (args, int);
287
else if (cflags == DP_C_LONG)
288
value = va_arg (args, long int);
289
else if (cflags == DP_C_LLONG)
290
value = va_arg (args, LLONG);
291
else
292
value = va_arg (args, int);
293
fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
294
break;
295
case 'o':
296
flags |= DP_F_UNSIGNED;
297
if (cflags == DP_C_SHORT)
298
value = va_arg (args, unsigned int);
299
else if (cflags == DP_C_LONG)
300
value = (long)va_arg (args, unsigned long int);
301
else if (cflags == DP_C_LLONG)
302
value = (long)va_arg (args, unsigned LLONG);
303
else
304
value = (long)va_arg (args, unsigned int);
305
fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags);
306
break;
307
case 'u':
308
flags |= DP_F_UNSIGNED;
309
if (cflags == DP_C_SHORT)
310
value = va_arg (args, unsigned int);
311
else if (cflags == DP_C_LONG)
312
value = (long)va_arg (args, unsigned long int);
313
else if (cflags == DP_C_LLONG)
314
value = (LLONG)va_arg (args, unsigned LLONG);
315
else
316
value = (long)va_arg (args, unsigned int);
317
fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
318
break;
319
case 'X':
320
flags |= DP_F_UP;
321
case 'x':
322
flags |= DP_F_UNSIGNED;
323
if (cflags == DP_C_SHORT)
324
value = va_arg (args, unsigned int);
325
else if (cflags == DP_C_LONG)
326
value = (long)va_arg (args, unsigned long int);
327
else if (cflags == DP_C_LLONG)
328
value = (LLONG)va_arg (args, unsigned LLONG);
329
else
330
value = (long)va_arg (args, unsigned int);
331
fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags);
332
break;
333
case 'f':
334
if (cflags == DP_C_LDOUBLE)
335
fvalue = va_arg (args, LDOUBLE);
336
else
337
fvalue = va_arg (args, double);
338
/* um, floating point? */
339
fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
340
break;
341
case 'E':
342
flags |= DP_F_UP;
343
case 'e':
344
if (cflags == DP_C_LDOUBLE)
345
fvalue = va_arg (args, LDOUBLE);
346
else
347
fvalue = va_arg (args, double);
348
break;
349
case 'G':
350
flags |= DP_F_UP;
351
case 'g':
352
if (cflags == DP_C_LDOUBLE)
353
fvalue = va_arg (args, LDOUBLE);
354
else
355
fvalue = va_arg (args, double);
356
break;
357
case 'c':
358
dopr_outch (buffer, &currlen, maxlen, va_arg (args, int));
359
break;
360
case 's':
361
strvalue = va_arg (args, char *);
362
if (!strvalue) strvalue = "(NULL)";
363
if (max == -1) {
364
max = strlen(strvalue);
365
}
366
if (min > 0 && max >= 0 && min > max) max = min;
367
fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max);
368
break;
369
case 'p':
370
strvalue = va_arg (args, void *);
371
fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags);
372
break;
373
case 'n':
374
if (cflags == DP_C_SHORT) {
375
short int *num;
376
num = va_arg (args, short int *);
377
*num = currlen;
378
} else if (cflags == DP_C_LONG) {
379
long int *num;
380
num = va_arg (args, long int *);
381
*num = (long int)currlen;
382
} else if (cflags == DP_C_LLONG) {
383
LLONG *num;
384
num = va_arg (args, LLONG *);
385
*num = (LLONG)currlen;
386
} else {
387
int *num;
388
num = va_arg (args, int *);
389
*num = currlen;
390
}
391
break;
392
case '%':
393
dopr_outch (buffer, &currlen, maxlen, ch);
394
break;
395
case 'w':
396
/* not supported yet, treat as next char */
397
ch = *format++;
398
break;
399
default:
400
/* Unknown, skip */
401
break;
402
}
403
ch = *format++;
404
state = DP_S_DEFAULT;
405
flags = cflags = min = 0;
406
max = -1;
407
break;
408
case DP_S_DONE:
409
break;
410
default:
411
/* hmm? */
412
break; /* some picky compilers need this */
413
}
414
}
415
if (maxlen != 0) {
416
if (currlen < maxlen - 1)
417
buffer[currlen] = '\0';
418
else if (maxlen > 0)
419
buffer[maxlen - 1] = '\0';
420
}
421
422
return currlen;
423
}
424
425
static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
426
char *value, int flags, int min, int max)
427
{
428
int padlen, strln; /* amount to pad */
429
int cnt = 0;
430
431
#ifdef DEBUG_SNPRINTF
432
printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value);
433
#endif
434
if (value == 0) {
435
value = "<NULL>";
436
}
437
438
for (strln = 0; value[strln]; ++strln); /* strlen */
439
padlen = min - strln;
440
if (padlen < 0)
441
padlen = 0;
442
if (flags & DP_F_MINUS)
443
padlen = -padlen; /* Left Justify */
444
445
while ((padlen > 0) && (cnt < max)) {
446
dopr_outch (buffer, currlen, maxlen, ' ');
447
--padlen;
448
++cnt;
449
}
450
while (*value && (cnt < max)) {
451
dopr_outch (buffer, currlen, maxlen, *value++);
452
++cnt;
453
}
454
while ((padlen < 0) && (cnt < max)) {
455
dopr_outch (buffer, currlen, maxlen, ' ');
456
++padlen;
457
++cnt;
458
}
459
}
460
461
/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
462
463
static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
464
long value, int base, int min, int max, int flags)
465
{
466
int signvalue = 0;
467
unsigned long uvalue;
468
char convert[20];
469
int place = 0;
470
int spadlen = 0; /* amount to space pad */
471
int zpadlen = 0; /* amount to zero pad */
472
int caps = 0;
473
474
if (max < 0)
475
max = 0;
476
477
uvalue = value;
478
479
if(!(flags & DP_F_UNSIGNED)) {
480
if( value < 0 ) {
481
signvalue = '-';
482
uvalue = -value;
483
} else {
484
if (flags & DP_F_PLUS) /* Do a sign (+/i) */
485
signvalue = '+';
486
else if (flags & DP_F_SPACE)
487
signvalue = ' ';
488
}
489
}
490
491
if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
492
493
do {
494
convert[place++] =
495
(caps? "0123456789ABCDEF":"0123456789abcdef")
496
[uvalue % (unsigned)base ];
497
uvalue = (uvalue / (unsigned)base );
498
} while(uvalue && (place < 20));
499
if (place == 20) place--;
500
convert[place] = 0;
501
502
zpadlen = max - place;
503
spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
504
if (zpadlen < 0) zpadlen = 0;
505
if (spadlen < 0) spadlen = 0;
506
if (flags & DP_F_ZERO) {
507
zpadlen = MAX(zpadlen, spadlen);
508
spadlen = 0;
509
}
510
if (flags & DP_F_MINUS)
511
spadlen = -spadlen; /* Left Justifty */
512
513
#ifdef DEBUG_SNPRINTF
514
printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
515
zpadlen, spadlen, min, max, place);
516
#endif
517
518
/* Spaces */
519
while (spadlen > 0) {
520
dopr_outch (buffer, currlen, maxlen, ' ');
521
--spadlen;
522
}
523
524
/* Sign */
525
if (signvalue)
526
dopr_outch (buffer, currlen, maxlen, signvalue);
527
528
/* Zeros */
529
if (zpadlen > 0) {
530
while (zpadlen > 0) {
531
dopr_outch (buffer, currlen, maxlen, '0');
532
--zpadlen;
533
}
534
}
535
536
/* Digits */
537
while (place > 0)
538
dopr_outch (buffer, currlen, maxlen, convert[--place]);
539
540
/* Left Justified spaces */
541
while (spadlen < 0) {
542
dopr_outch (buffer, currlen, maxlen, ' ');
543
++spadlen;
544
}
545
}
546
547
static LDOUBLE abs_val(LDOUBLE value)
548
{
549
LDOUBLE result = value;
550
551
if (value < 0)
552
result = -value;
553
554
return result;
555
}
556
557
static LDOUBLE POW10(int exp)
558
{
559
LDOUBLE result = 1;
560
561
while (exp) {
562
result *= 10;
563
exp--;
564
}
565
566
return result;
567
}
568
569
static LLONG ROUND(LDOUBLE value)
570
{
571
LLONG intpart;
572
573
intpart = (LLONG)value;
574
value = value - intpart;
575
if (value >= 0.5) intpart++;
576
577
return intpart;
578
}
579
580
/* a replacement for modf that doesn't need the math library. Should
581
be portable, but slow */
582
static double my_modf(double x0, double *iptr)
583
{
584
int i;
585
long l;
586
double x = x0;
587
double f = 1.0;
588
589
for (i=0;i<100;i++) {
590
l = (long)x;
591
if (l <= (x+1) && l >= (x-1)) break;
592
x *= 0.1;
593
f *= 10.0;
594
}
595
596
if (i == 100) {
597
/* yikes! the number is beyond what we can handle. What do we do? */
598
(*iptr) = 0;
599
return 0;
600
}
601
602
if (i != 0) {
603
double i2;
604
double ret;
605
606
ret = my_modf(x0-l*f, &i2);
607
(*iptr) = l*f + i2;
608
return ret;
609
}
610
611
(*iptr) = l;
612
return x - (*iptr);
613
}
614
615
616
static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
617
LDOUBLE fvalue, int min, int max, int flags)
618
{
619
int signvalue = 0;
620
double ufvalue;
621
char iconvert[311];
622
char fconvert[311];
623
int iplace = 0;
624
int fplace = 0;
625
int padlen = 0; /* amount to pad */
626
int zpadlen = 0;
627
int caps = 0;
628
int index;
629
double intpart;
630
double fracpart;
631
double temp;
632
633
/*
634
* AIX manpage says the default is 0, but Solaris says the default
635
* is 6, and sprintf on AIX defaults to 6
636
*/
637
if (max < 0)
638
max = 6;
639
640
ufvalue = abs_val (fvalue);
641
642
if (fvalue < 0) {
643
signvalue = '-';
644
} else {
645
if (flags & DP_F_PLUS) { /* Do a sign (+/i) */
646
signvalue = '+';
647
} else {
648
if (flags & DP_F_SPACE)
649
signvalue = ' ';
650
}
651
}
652
653
#if 0
654
if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
655
#endif
656
657
#if 0
658
if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */
659
#endif
660
661
/*
662
* Sorry, we only support 16 digits past the decimal because of our
663
* conversion method
664
*/
665
if (max > 16)
666
max = 16;
667
668
/* We "cheat" by converting the fractional part to integer by
669
* multiplying by a factor of 10
670
*/
671
672
temp = ufvalue;
673
my_modf(temp, &intpart);
674
675
fracpart = ROUND((POW10(max)) * (ufvalue - intpart));
676
677
if (fracpart >= POW10(max)) {
678
intpart++;
679
fracpart -= POW10(max);
680
}
681
682
683
/* Convert integer part */
684
do {
685
temp = intpart*0.1;
686
my_modf(temp, &intpart);
687
index = (int) ((temp -intpart +0.05)* 10.0);
688
/* index = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */
689
/* printf ("%llf, %f, %x\n", temp, intpart, index); */
690
iconvert[iplace++] =
691
(caps? "0123456789ABCDEF":"0123456789abcdef")[index];
692
} while (intpart && (iplace < 311));
693
if (iplace == 311) iplace--;
694
iconvert[iplace] = 0;
695
696
/* Convert fractional part */
697
if (fracpart)
698
{
699
do {
700
temp = fracpart*0.1;
701
my_modf(temp, &fracpart);
702
index = (int) ((temp -fracpart +0.05)* 10.0);
703
/* index = (int) ((((temp/10) -fracpart) +0.05) *10); */
704
/* printf ("%lf, %lf, %ld\n", temp, fracpart, index); */
705
fconvert[fplace++] =
706
(caps? "0123456789ABCDEF":"0123456789abcdef")[index];
707
} while(fracpart && (fplace < 311));
708
if (fplace == 311) fplace--;
709
}
710
fconvert[fplace] = 0;
711
712
/* -1 for decimal point, another -1 if we are printing a sign */
713
padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
714
zpadlen = max - fplace;
715
if (zpadlen < 0) zpadlen = 0;
716
if (padlen < 0)
717
padlen = 0;
718
if (flags & DP_F_MINUS)
719
padlen = -padlen; /* Left Justifty */
720
721
if ((flags & DP_F_ZERO) && (padlen > 0)) {
722
if (signvalue) {
723
dopr_outch (buffer, currlen, maxlen, signvalue);
724
--padlen;
725
signvalue = 0;
726
}
727
while (padlen > 0) {
728
dopr_outch (buffer, currlen, maxlen, '0');
729
--padlen;
730
}
731
}
732
while (padlen > 0) {
733
dopr_outch (buffer, currlen, maxlen, ' ');
734
--padlen;
735
}
736
if (signvalue)
737
dopr_outch (buffer, currlen, maxlen, signvalue);
738
739
while (iplace > 0)
740
dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);
741
742
#ifdef DEBUG_SNPRINTF
743
printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen);
744
#endif
745
746
/*
747
* Decimal point. This should probably use locale to find the correct
748
* char to print out.
749
*/
750
if (max > 0) {
751
dopr_outch (buffer, currlen, maxlen, '.');
752
753
while (zpadlen > 0) {
754
dopr_outch (buffer, currlen, maxlen, '0');
755
--zpadlen;
756
}
757
758
while (fplace > 0)
759
dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
760
}
761
762
while (padlen < 0) {
763
dopr_outch (buffer, currlen, maxlen, ' ');
764
++padlen;
765
}
766
}
767
768
static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c)
769
{
770
if (*currlen < maxlen) {
771
buffer[(*currlen)] = c;
772
}
773
(*currlen)++;
774
}
775
776
/* yes this really must be a ||. Don't muck with this (tridge) */
777
#if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
778
int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
779
{
780
return dopr(str, count, fmt, args);
781
}
782
#endif
783
784
/* yes this really must be a ||. Don't muck wiith this (tridge)
785
*
786
* The logic for these two is that we need our own definition if the
787
* OS *either* has no definition of *sprintf, or if it does have one
788
* that doesn't work properly according to the autoconf test. Perhaps
789
* these should really be smb_snprintf to avoid conflicts with buggy
790
* linkers? -- mbp
791
*/
792
#if !defined(HAVE_SNPRINTF) /* || !defined(HAVE_C99_SNPRINTF) */
793
int snprintf(char *str,size_t count,const char *fmt,...)
794
{
795
size_t ret;
796
va_list ap;
797
798
va_start(ap, fmt);
799
ret = vsnprintf(str, count, fmt, ap);
800
va_end(ap);
801
return ret;
802
}
803
#endif
804
805
#endif
806
807
#ifndef HAVE_VASPRINTF
808
int vasprintf(char **ptr, const char *format, va_list ap)
809
{
810
int ret;
811
va_list ap2;
812
813
VA_COPY(ap2, ap);
814
815
ret = vsnprintf(NULL, 0, format, ap2);
816
if (ret <= 0) return ret;
817
818
(*ptr) = (char *)malloc(ret+1);
819
if (!*ptr) return -1;
820
821
VA_COPY(ap2, ap);
822
823
ret = vsnprintf(*ptr, ret+1, format, ap2);
824
825
return ret;
826
}
827
#endif
828
829
830
#ifndef HAVE_ASPRINTF
831
int asprintf(char **ptr, const char *format, ...)
832
{
833
va_list ap;
834
int ret;
835
836
*ptr = NULL;
837
va_start(ap, format);
838
ret = vasprintf(ptr, format, ap);
839
va_end(ap);
840
841
return ret;
842
}
843
#endif
844
845
#ifdef TEST_SNPRINTF
846
847
int sprintf(char *str,const char *fmt,...);
848
849
int main (void)
850
{
851
char buf1[1024];
852
char buf2[1024];
853
char *fp_fmt[] = {
854
"%1.1f",
855
"%-1.5f",
856
"%1.5f",
857
"%123.9f",
858
"%10.5f",
859
"% 10.5f",
860
"%+22.9f",
861
"%+4.9f",
862
"%01.3f",
863
"%4f",
864
"%3.1f",
865
"%3.2f",
866
"%.0f",
867
"%f",
868
"-16.16f",
869
NULL
870
};
871
double fp_nums[] = { 6442452944.1234, -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996,
872
0.9996, 1.996, 4.136, 5.030201, 0};
873
char *int_fmt[] = {
874
"%-1.5d",
875
"%1.5d",
876
"%123.9d",
877
"%5.5d",
878
"%10.5d",
879
"% 10.5d",
880
"%+22.33d",
881
"%01.3d",
882
"%4d",
883
"%d",
884
NULL
885
};
886
long int_nums[] = { -1, 134, 91340, 341, 0203, 0};
887
char *str_fmt[] = {
888
"10.5s",
889
"5.10s",
890
"10.1s",
891
"0.10s",
892
"10.0s",
893
"1.10s",
894
"%s",
895
"%.1s",
896
"%.10s",
897
"%10s",
898
NULL
899
};
900
char *str_vals[] = {"hello", "a", "", "a longer string", NULL};
901
int x, y;
902
int fail = 0;
903
int num = 0;
904
905
printf ("Testing snprintf format codes against system sprintf...\n");
906
907
for (x = 0; fp_fmt[x] ; x++) {
908
for (y = 0; fp_nums[y] != 0 ; y++) {
909
int l1 = snprintf(NULL, 0, fp_fmt[x], fp_nums[y]);
910
int l2 = snprintf(buf1, sizeof(buf1), fp_fmt[x], fp_nums[y]);
911
sprintf (buf2, fp_fmt[x], fp_nums[y]);
912
if (strcmp (buf1, buf2)) {
913
printf("snprintf doesn't match Format: %s\n\tsnprintf = [%s]\n\t sprintf = [%s]\n",
914
fp_fmt[x], buf1, buf2);
915
fail++;
916
}
917
if (l1 != l2) {
918
printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, fp_fmt[x]);
919
fail++;
920
}
921
num++;
922
}
923
}
924
925
for (x = 0; int_fmt[x] ; x++) {
926
for (y = 0; int_nums[y] != 0 ; y++) {
927
int l1 = snprintf(NULL, 0, int_fmt[x], int_nums[y]);
928
int l2 = snprintf(buf1, sizeof(buf1), int_fmt[x], int_nums[y]);
929
sprintf (buf2, int_fmt[x], int_nums[y]);
930
if (strcmp (buf1, buf2)) {
931
printf("snprintf doesn't match Format: %s\n\tsnprintf = [%s]\n\t sprintf = [%s]\n",
932
int_fmt[x], buf1, buf2);
933
fail++;
934
}
935
if (l1 != l2) {
936
printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, int_fmt[x]);
937
fail++;
938
}
939
num++;
940
}
941
}
942
943
for (x = 0; str_fmt[x] ; x++) {
944
for (y = 0; str_vals[y] != 0 ; y++) {
945
int l1 = snprintf(NULL, 0, str_fmt[x], str_vals[y]);
946
int l2 = snprintf(buf1, sizeof(buf1), str_fmt[x], str_vals[y]);
947
sprintf (buf2, str_fmt[x], str_vals[y]);
948
if (strcmp (buf1, buf2)) {
949
printf("snprintf doesn't match Format: %s\n\tsnprintf = [%s]\n\t sprintf = [%s]\n",
950
str_fmt[x], buf1, buf2);
951
fail++;
952
}
953
if (l1 != l2) {
954
printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, str_fmt[x]);
955
fail++;
956
}
957
num++;
958
}
959
}
960
961
printf ("%d tests failed out of %d.\n", fail, num);
962
963
printf("seeing how many digits we support\n");
964
{
965
double v0 = 0.12345678901234567890123456789012345678901;
966
for (x=0; x<100; x++) {
967
double p = pow(10, x);
968
double r = v0*p;
969
snprintf(buf1, sizeof(buf1), "%1.1f", r);
970
sprintf(buf2, "%1.1f", r);
971
if (strcmp(buf1, buf2)) {
972
printf("we seem to support %d digits\n", x-1);
973
break;
974
}
975
}
976
}
977
978
return 0;
979
}
980
#endif /* SNPRINTF_TEST */
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