2
* NOTE: If you change this file, please merge it into rsync, samba, etc.
6
* Copyright Patrick Powell 1995
7
* This code is based on code written by Patrick Powell (papowell@astart.com)
8
* It may be used for any purpose as long as this notice remains intact
9
* on all source code distributions
12
/**************************************************************
14
* Patrick Powell Tue Apr 11 09:48:21 PDT 1995
15
* A bombproof version of doprnt (dopr) included.
16
* Sigh. This sort of thing is always nasty do deal with. Note that
17
* the version here does not include floating point...
19
* snprintf() is used instead of sprintf() as it does limit checks
20
* for string length. This covers a nasty loophole.
22
* The other functions are there to prevent NULL pointers from
23
* causing nast effects.
26
* Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
27
* This was ugly. It is still ugly. I opted out of floating point
28
* numbers, but the formatter understands just about everything
29
* from the normal C string format, at least as far as I can tell from
30
* the Solaris 2.5 printf(3S) man page.
32
* Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
33
* Ok, added some minimal floating point support, which means this
34
* probably requires libm on most operating systems. Don't yet
35
* support the exponent (e,E) and sigfig (g,G). Also, fmtint()
36
* was pretty badly broken, it just wasn't being exercised in ways
37
* which showed it, so that's been fixed. Also, formated the code
38
* to mutt conventions, and removed dead code left over from the
39
* original. Also, there is now a builtin-test, just compile with:
40
* gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
41
* and run snprintf for results.
43
* Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
44
* The PGP code was using unsigned hexadecimal formats.
45
* Unfortunately, unsigned formats simply didn't work.
47
* Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
48
* The original code assumed that both snprintf() and vsnprintf() were
49
* missing. Some systems only have snprintf() but not vsnprintf(), so
50
* the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
52
* Andrew Tridgell (tridge@samba.org) Oct 1998
53
* fixed handling of %.0f
54
* added test for HAVE_LONG_DOUBLE
56
* tridge@samba.org, idra@samba.org, April 2001
57
* got rid of fcvt code (twas buggy and made testing harder)
60
* date: 2002/12/19 19:56:31; author: herb; state: Exp; lines: +2 -0
61
* actually print args for %g and %e
63
* date: 2002/06/03 13:37:52; author: jmcd; state: Exp; lines: +8 -0
64
* Since includes.h isn't included here, VA_COPY has to be defined here. I don't
65
* see any include file that is guaranteed to be here, so I'm defining it
66
* locally. Fixes AIX and Solaris builds.
68
* date: 2002/06/03 03:07:24; author: tridge; state: Exp; lines: +5 -13
69
* put the ifdef for HAVE_VA_COPY in one place rather than in lots of
72
* date: 2002/05/17 14:51:22; author: jmcd; state: Exp; lines: +21 -4
73
* Fix usage of va_list passed as an arg. Use __va_copy before using it
76
* date: 2002/04/16 22:38:04; author: idra; state: Exp; lines: +20 -14
77
* Fix incorrect zpadlen handling in fmtfp.
78
* Thanks to Ollie Oldham <ollie.oldham@metro-optix.com> for spotting it.
79
* few mods to make it easier to compile the tests.
80
* addedd the "Ollie" test to the floating point ones.
82
* Martin Pool (mbp@samba.org) April 2003
83
* Remove NO_CONFIG_H so that the test case can be built within a source
84
* tree with less trouble.
85
* Remove unnecessary SAFE_FREE() definition.
87
* Martin Pool (mbp@samba.org) May 2003
88
* Put in a prototype for dummy_snprintf() to quiet compiler warnings.
90
* Move #endif to make sure VA_COPY, LDOUBLE, etc are defined even
91
* if the C library has some snprintf functions already.
93
* Darren Tucker (dtucker@zip.com.au) 2005
94
* Fix bug allowing read overruns of the source string with "%.*s"
95
* Usually harmless unless the read runs outside the process' allocation
96
* (eg if your malloc does guard pages) in which case it will segfault.
97
* From OpenSSH. Also added test for same.
99
* Simo Sorce (idra@samba.org) Jan 2006
101
* Add support for position independent parameters
102
* fix fmtstr now it conforms to sprintf wrt min.max
104
**************************************************************/
107
#include "system/locale.h"
109
#ifdef TEST_SNPRINTF /* need math library headers for testing */
111
/* In test mode, we pretend that this system doesn't have any snprintf
112
* functions, regardless of what config.h says. */
113
# undef HAVE_SNPRINTF
114
# undef HAVE_VSNPRINTF
115
# undef HAVE_C99_VSNPRINTF
116
# undef HAVE_ASPRINTF
117
# undef HAVE_VASPRINTF
119
#endif /* TEST_SNPRINTF */
121
#if defined(HAVE_SNPRINTF) && defined(HAVE_VSNPRINTF) && defined(HAVE_C99_VSNPRINTF)
122
/* only include stdio.h if we are not re-defining snprintf or vsnprintf */
124
/* make the compiler happy with an empty file */
125
void dummy_snprintf(void);
126
void dummy_snprintf(void) {}
127
#endif /* HAVE_SNPRINTF, etc */
129
/* yes this really must be a ||. Don't muck with this (tridge) */
130
#if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
132
#ifdef HAVE_LONG_DOUBLE
133
#define LDOUBLE long double
135
#define LDOUBLE double
138
#ifdef HAVE_LONG_LONG
139
#define LLONG long long
146
#define VA_COPY(dest, src) va_copy(dest, src)
148
#ifdef HAVE___VA_COPY
149
#define VA_COPY(dest, src) __va_copy(dest, src)
151
#define VA_COPY(dest, src) (dest) = (src)
156
* dopr(): poor man's version of doprintf
159
/* format read states */
160
#define DP_S_DEFAULT 0
169
/* format flags - Bits */
170
#define DP_F_MINUS (1 << 0)
171
#define DP_F_PLUS (1 << 1)
172
#define DP_F_SPACE (1 << 2)
173
#define DP_F_NUM (1 << 3)
174
#define DP_F_ZERO (1 << 4)
175
#define DP_F_UP (1 << 5)
176
#define DP_F_UNSIGNED (1 << 6)
178
/* Conversion Flags */
182
#define DP_C_LDOUBLE 4
187
#define CNK_FMT_STR 0
199
#define char_to_int(p) ((p)- '0')
201
#define MAX(p,q) (((p) >= (q)) ? (p) : (q))
205
int type; /* chunk type */
206
int num; /* parameter number */
217
struct pr_chunk *min_star;
218
struct pr_chunk *max_star;
219
struct pr_chunk *next;
223
struct pr_chunk **chunks;
227
static int dopr(char *buffer, size_t maxlen, const char *format,
229
static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
230
char *value, int flags, int min, int max);
231
static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
232
LLONG value, int base, int min, int max, int flags);
233
static void fmtfp(char *buffer, size_t *currlen, size_t maxlen,
234
LDOUBLE fvalue, int min, int max, int flags);
235
static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c);
236
static struct pr_chunk *new_chunk(void);
237
static int add_cnk_list_entry(struct pr_chunk_x **list,
238
int max_num, struct pr_chunk *chunk);
240
static int dopr(char *buffer, size_t maxlen, const char *format, va_list args_in)
250
struct pr_chunk *chunks = NULL;
251
struct pr_chunk *cnk = NULL;
252
struct pr_chunk_x *clist = NULL;
256
VA_COPY(args, args_in);
258
state = DP_S_DEFAULT;
267
/* retrieve the string structure as chunks */
268
while (state != DP_S_DONE) {
276
cnk->next = new_chunk();
282
if (!chunks) chunks = cnk;
288
cnk->type = CNK_FMT_STR;
289
cnk->start = format - base -1;
290
while ((ch != '\0') && (ch != '%')) ch = *format++;
291
cnk->len = format - base - cnk->start -1;
297
cnk->flags |= DP_F_MINUS;
301
cnk->flags |= DP_F_PLUS;
305
cnk->flags |= DP_F_SPACE;
309
cnk->flags |= DP_F_NUM;
313
cnk->flags |= DP_F_ZERO;
317
/* internationalization not supported yet */
326
if (isdigit((unsigned char)ch)) {
327
cnk->min = 10 * cnk->min + char_to_int (ch);
329
} else if (ch == '$') {
330
if (!pfirst && !pflag) {
331
/* parameters must be all positioned or none */
338
if (cnk->min == 0) /* what ?? */
343
} else if (ch == '*') {
344
if (pfirst) pfirst = 0;
345
cnk->min_star = new_chunk();
346
if (!cnk->min_star) /* out of memory :-( */
348
cnk->min_star->type = CNK_INT;
352
if (!isdigit((unsigned char)ch)) {
353
/* parameters must be all positioned or none */
356
for (num = 0; isdigit((unsigned char)ch); ch = *format++) {
357
num = 10 * num + char_to_int(ch);
359
cnk->min_star->num = num;
360
if (ch != '$') /* what ?? */
363
cnk->min_star->num = ++pnum;
365
max_pos = add_cnk_list_entry(&clist, max_pos, cnk->min_star);
366
if (max_pos == 0) /* out of memory :-( */
371
if (pfirst) pfirst = 0;
384
if (isdigit((unsigned char)ch)) {
387
cnk->max = 10 * cnk->max + char_to_int (ch);
389
} else if (ch == '$') {
390
if (!pfirst && !pflag) {
391
/* parameters must be all positioned or none */
394
if (cnk->max <= 0) /* what ?? */
399
} else if (ch == '*') {
400
cnk->max_star = new_chunk();
401
if (!cnk->max_star) /* out of memory :-( */
403
cnk->max_star->type = CNK_INT;
407
if (!isdigit((unsigned char)ch)) {
408
/* parameters must be all positioned or none */
411
for (num = 0; isdigit((unsigned char)ch); ch = *format++) {
412
num = 10 * num + char_to_int(ch);
414
cnk->max_star->num = num;
415
if (ch != '$') /* what ?? */
418
cnk->max_star->num = ++pnum;
420
max_pos = add_cnk_list_entry(&clist, max_pos, cnk->max_star);
421
if (max_pos == 0) /* out of memory :-( */
433
cnk->cflags = DP_C_SHORT;
436
cnk->cflags = DP_C_CHAR;
441
cnk->cflags = DP_C_LONG;
443
if (ch == 'l') { /* It's a long long */
444
cnk->cflags = DP_C_LLONG;
449
cnk->cflags = DP_C_LDOUBLE;
453
cnk->cflags = DP_C_SIZET;
462
if (cnk->num == 0) cnk->num = ++pnum;
463
max_pos = add_cnk_list_entry(&clist, max_pos, cnk);
464
if (max_pos == 0) /* out of memory :-( */
473
cnk->type = CNK_OCTAL;
474
cnk->flags |= DP_F_UNSIGNED;
477
cnk->type = CNK_UINT;
478
cnk->flags |= DP_F_UNSIGNED;
481
cnk->flags |= DP_F_UP;
484
cnk->flags |= DP_F_UNSIGNED;
487
/* hex float not supported yet */
491
cnk->flags |= DP_F_UP;
493
/* hex float not supported yet */
497
cnk->type = CNK_FLOAT;
500
cnk->type = CNK_CHAR;
503
cnk->type = CNK_STRING;
512
cnk->type = CNK_PRCNT;
515
/* Unknown, bail out*/
519
state = DP_S_DEFAULT;
525
break; /* some picky compilers need this */
529
/* retrieve the format arguments */
530
for (pnum = 0; pnum < max_pos; pnum++) {
533
if (clist[pnum].num == 0) {
534
/* ignoring a parameter should not be permitted
535
* all parameters must be matched at least once
536
* BUT seem some system ignore this rule ...
537
* at least my glibc based system does --SSS
539
#ifdef DEBUG_SNPRINTF
540
printf("parameter at position %d not used\n", pnum+1);
542
/* eat the parameter */
546
for (i = 1; i < clist[pnum].num; i++) {
547
if (clist[pnum].chunks[0]->type != clist[pnum].chunks[i]->type) {
549
* all the references to a parameter
550
* must be of the same type
555
cnk = clist[pnum].chunks[0];
558
if (cnk->cflags == DP_C_SHORT)
559
cnk->value = va_arg (args, int);
560
else if (cnk->cflags == DP_C_LONG)
561
cnk->value = va_arg (args, long int);
562
else if (cnk->cflags == DP_C_LLONG)
563
cnk->value = va_arg (args, LLONG);
564
else if (cnk->cflags == DP_C_SIZET)
565
cnk->value = va_arg (args, ssize_t);
567
cnk->value = va_arg (args, int);
569
for (i = 1; i < clist[pnum].num; i++) {
570
clist[pnum].chunks[i]->value = cnk->value;
577
if (cnk->cflags == DP_C_SHORT)
578
cnk->value = va_arg (args, unsigned int);
579
else if (cnk->cflags == DP_C_LONG)
580
cnk->value = (unsigned long int)va_arg (args, unsigned long int);
581
else if (cnk->cflags == DP_C_LLONG)
582
cnk->value = (LLONG)va_arg (args, unsigned LLONG);
583
else if (cnk->cflags == DP_C_SIZET)
584
cnk->value = (size_t)va_arg (args, size_t);
586
cnk->value = (unsigned int)va_arg (args, unsigned int);
588
for (i = 1; i < clist[pnum].num; i++) {
589
clist[pnum].chunks[i]->value = cnk->value;
594
if (cnk->cflags == DP_C_LDOUBLE)
595
cnk->fvalue = va_arg (args, LDOUBLE);
597
cnk->fvalue = va_arg (args, double);
599
for (i = 1; i < clist[pnum].num; i++) {
600
clist[pnum].chunks[i]->fvalue = cnk->fvalue;
605
cnk->value = va_arg (args, int);
607
for (i = 1; i < clist[pnum].num; i++) {
608
clist[pnum].chunks[i]->value = cnk->value;
613
cnk->strvalue = va_arg (args, char *);
614
if (!cnk->strvalue) cnk->strvalue = "(NULL)";
616
for (i = 1; i < clist[pnum].num; i++) {
617
clist[pnum].chunks[i]->strvalue = cnk->strvalue;
622
cnk->strvalue = va_arg (args, void *);
623
for (i = 1; i < clist[pnum].num; i++) {
624
clist[pnum].chunks[i]->strvalue = cnk->strvalue;
629
if (cnk->cflags == DP_C_CHAR)
630
cnk->pnum = va_arg (args, char *);
631
else if (cnk->cflags == DP_C_SHORT)
632
cnk->pnum = va_arg (args, short int *);
633
else if (cnk->cflags == DP_C_LONG)
634
cnk->pnum = va_arg (args, long int *);
635
else if (cnk->cflags == DP_C_LLONG)
636
cnk->pnum = va_arg (args, LLONG *);
637
else if (cnk->cflags == DP_C_SIZET)
638
cnk->pnum = va_arg (args, ssize_t *);
640
cnk->pnum = va_arg (args, int *);
642
for (i = 1; i < clist[pnum].num; i++) {
643
clist[pnum].chunks[i]->pnum = cnk->pnum;
655
/* print out the actual string from chunks */
661
if (cnk->min_star) min = cnk->min_star->value;
663
if (cnk->max_star) max = cnk->max_star->value;
669
if (maxlen != 0 && maxlen > currlen) {
670
if (maxlen > (currlen + cnk->len)) len = cnk->len;
671
else len = maxlen - currlen;
673
memcpy(&(buffer[currlen]), &(base[cnk->start]), len);
681
fmtint (buffer, &currlen, maxlen, cnk->value, 10, min, max, cnk->flags);
685
fmtint (buffer, &currlen, maxlen, cnk->value, 8, min, max, cnk->flags);
689
fmtint (buffer, &currlen, maxlen, cnk->value, 16, min, max, cnk->flags);
693
fmtfp (buffer, &currlen, maxlen, cnk->fvalue, min, max, cnk->flags);
697
dopr_outch (buffer, &currlen, maxlen, cnk->value);
702
max = strlen(cnk->strvalue);
704
fmtstr (buffer, &currlen, maxlen, cnk->strvalue, cnk->flags, min, max);
708
fmtint (buffer, &currlen, maxlen, (long)(cnk->strvalue), 16, min, max, cnk->flags);
712
if (cnk->cflags == DP_C_CHAR)
713
*((char *)(cnk->pnum)) = (char)currlen;
714
else if (cnk->cflags == DP_C_SHORT)
715
*((short int *)(cnk->pnum)) = (short int)currlen;
716
else if (cnk->cflags == DP_C_LONG)
717
*((long int *)(cnk->pnum)) = (long int)currlen;
718
else if (cnk->cflags == DP_C_LLONG)
719
*((LLONG *)(cnk->pnum)) = (LLONG)currlen;
720
else if (cnk->cflags == DP_C_SIZET)
721
*((ssize_t *)(cnk->pnum)) = (ssize_t)currlen;
723
*((int *)(cnk->pnum)) = (int)currlen;
727
dopr_outch (buffer, &currlen, maxlen, '%');
737
if (currlen < maxlen - 1)
738
buffer[currlen] = '\0';
740
buffer[maxlen - 1] = '\0';
753
for (pnum = 0; pnum < max_pos; pnum++) {
754
if (clist[pnum].chunks) free(clist[pnum].chunks);
761
static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
762
char *value, int flags, int min, int max)
764
int padlen, strln; /* amount to pad */
767
#ifdef DEBUG_SNPRINTF
768
printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value);
774
for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */
775
padlen = min - strln;
778
if (flags & DP_F_MINUS)
779
padlen = -padlen; /* Left Justify */
782
dopr_outch (buffer, currlen, maxlen, ' ');
785
while (*value && (cnt < max)) {
786
dopr_outch (buffer, currlen, maxlen, *value++);
790
dopr_outch (buffer, currlen, maxlen, ' ');
795
/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
797
static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
798
LLONG value, int base, int min, int max, int flags)
801
unsigned LLONG uvalue;
804
int spadlen = 0; /* amount to space pad */
805
int zpadlen = 0; /* amount to zero pad */
813
if(!(flags & DP_F_UNSIGNED)) {
818
if (flags & DP_F_PLUS) /* Do a sign (+/i) */
820
else if (flags & DP_F_SPACE)
825
if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
829
(caps? "0123456789ABCDEF":"0123456789abcdef")
830
[uvalue % (unsigned)base ];
831
uvalue = (uvalue / (unsigned)base );
832
} while(uvalue && (place < 20));
833
if (place == 20) place--;
836
zpadlen = max - place;
837
spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
838
if (zpadlen < 0) zpadlen = 0;
839
if (spadlen < 0) spadlen = 0;
840
if (flags & DP_F_ZERO) {
841
zpadlen = MAX(zpadlen, spadlen);
844
if (flags & DP_F_MINUS)
845
spadlen = -spadlen; /* Left Justifty */
847
#ifdef DEBUG_SNPRINTF
848
printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
849
zpadlen, spadlen, min, max, place);
853
while (spadlen > 0) {
854
dopr_outch (buffer, currlen, maxlen, ' ');
860
dopr_outch (buffer, currlen, maxlen, signvalue);
864
while (zpadlen > 0) {
865
dopr_outch (buffer, currlen, maxlen, '0');
872
dopr_outch (buffer, currlen, maxlen, convert[--place]);
874
/* Left Justified spaces */
875
while (spadlen < 0) {
876
dopr_outch (buffer, currlen, maxlen, ' ');
881
static LDOUBLE abs_val(LDOUBLE value)
883
LDOUBLE result = value;
891
static LDOUBLE POW10(int exp)
903
static LLONG ROUND(LDOUBLE value)
907
intpart = (LLONG)value;
908
value = value - intpart;
909
if (value >= 0.5) intpart++;
914
/* a replacement for modf that doesn't need the math library. Should
915
be portable, but slow */
916
static double my_modf(double x0, double *iptr)
923
for (i=0;i<100;i++) {
925
if (l <= (x+1) && l >= (x-1)) break;
931
/* yikes! the number is beyond what we can handle. What do we do? */
940
ret = my_modf(x0-l*f, &i2);
950
static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
951
LDOUBLE fvalue, int min, int max, int flags)
959
int padlen = 0; /* amount to pad */
968
* AIX manpage says the default is 0, but Solaris says the default
969
* is 6, and sprintf on AIX defaults to 6
974
ufvalue = abs_val (fvalue);
979
if (flags & DP_F_PLUS) { /* Do a sign (+/i) */
982
if (flags & DP_F_SPACE)
988
if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
992
if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */
996
* Sorry, we only support 9 digits past the decimal because of our
1002
/* We "cheat" by converting the fractional part to integer by
1003
* multiplying by a factor of 10
1007
my_modf(temp, &intpart);
1009
fracpart = ROUND((POW10(max)) * (ufvalue - intpart));
1011
if (fracpart >= POW10(max)) {
1013
fracpart -= POW10(max);
1017
/* Convert integer part */
1020
my_modf(temp, &intpart);
1021
idx = (int) ((temp -intpart +0.05)* 10.0);
1022
/* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */
1023
/* printf ("%llf, %f, %x\n", temp, intpart, idx); */
1024
iconvert[iplace++] =
1025
(caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
1026
} while (intpart && (iplace < 311));
1027
if (iplace == 311) iplace--;
1028
iconvert[iplace] = 0;
1030
/* Convert fractional part */
1034
temp = fracpart*0.1;
1035
my_modf(temp, &fracpart);
1036
idx = (int) ((temp -fracpart +0.05)* 10.0);
1037
/* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */
1038
/* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */
1039
fconvert[fplace++] =
1040
(caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
1041
} while(fracpart && (fplace < 311));
1042
if (fplace == 311) fplace--;
1044
fconvert[fplace] = 0;
1046
/* -1 for decimal point, another -1 if we are printing a sign */
1047
padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
1048
zpadlen = max - fplace;
1049
if (zpadlen < 0) zpadlen = 0;
1052
if (flags & DP_F_MINUS)
1053
padlen = -padlen; /* Left Justifty */
1055
if ((flags & DP_F_ZERO) && (padlen > 0)) {
1057
dopr_outch (buffer, currlen, maxlen, signvalue);
1061
while (padlen > 0) {
1062
dopr_outch (buffer, currlen, maxlen, '0');
1066
while (padlen > 0) {
1067
dopr_outch (buffer, currlen, maxlen, ' ');
1071
dopr_outch (buffer, currlen, maxlen, signvalue);
1074
dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);
1076
#ifdef DEBUG_SNPRINTF
1077
printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen);
1081
* Decimal point. This should probably use locale to find the correct
1082
* char to print out.
1085
dopr_outch (buffer, currlen, maxlen, '.');
1087
while (zpadlen > 0) {
1088
dopr_outch (buffer, currlen, maxlen, '0');
1093
dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
1096
while (padlen < 0) {
1097
dopr_outch (buffer, currlen, maxlen, ' ');
1102
static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c)
1104
if (*currlen < maxlen) {
1105
buffer[(*currlen)] = c;
1110
static struct pr_chunk *new_chunk(void) {
1111
struct pr_chunk *new_c = (struct pr_chunk *)malloc(sizeof(struct pr_chunk));
1119
new_c->min_star = NULL;
1121
new_c->max_star = NULL;
1128
new_c->strvalue = NULL;
1135
static int add_cnk_list_entry(struct pr_chunk_x **list,
1136
int max_num, struct pr_chunk *chunk) {
1137
struct pr_chunk_x *l;
1138
struct pr_chunk **c;
1143
if (chunk->num > max_num) {
1146
if (*list == NULL) {
1147
l = (struct pr_chunk_x *)malloc(sizeof(struct pr_chunk_x) * max);
1150
l = (struct pr_chunk_x *)realloc(*list, sizeof(struct pr_chunk_x) * max);
1154
for (i = 0; i < max; i++) {
1155
if ((*list)[i].chunks) free((*list)[i].chunks);
1159
for (i = pos; i < max; i++) {
1169
cnum = l[i].num + 1;
1170
if (l[i].chunks == NULL) {
1171
c = (struct pr_chunk **)malloc(sizeof(struct pr_chunk *) * cnum);
1173
c = (struct pr_chunk **)realloc(l[i].chunks, sizeof(struct pr_chunk *) * cnum);
1176
for (i = 0; i < max; i++) {
1177
if (l[i].chunks) free(l[i].chunks);
1181
c[l[i].num] = chunk;
1189
int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
1191
return dopr(str, count, fmt, args);
1195
/* yes this really must be a ||. Don't muck with this (tridge)
1197
* The logic for these two is that we need our own definition if the
1198
* OS *either* has no definition of *sprintf, or if it does have one
1199
* that doesn't work properly according to the autoconf test.
1201
#if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
1202
int snprintf(char *str,size_t count,const char *fmt,...)
1208
ret = vsnprintf(str, count, fmt, ap);
1214
#ifndef HAVE_C99_VSNPRINTF
1215
int printf(const char *fmt, ...)
1223
ret = vasprintf(&s, fmt, ap);
1227
fwrite(s, 1, strlen(s), stdout);
1235
#ifndef HAVE_C99_VSNPRINTF
1236
int fprintf(FILE *stream, const char *fmt, ...)
1244
ret = vasprintf(&s, fmt, ap);
1248
fwrite(s, 1, strlen(s), stream);
1258
#ifndef HAVE_VASPRINTF
1259
int vasprintf(char **ptr, const char *format, va_list ap)
1265
ret = vsnprintf(NULL, 0, format, ap2);
1267
if (ret < 0) return ret;
1269
(*ptr) = (char *)malloc(ret+1);
1270
if (!*ptr) return -1;
1273
ret = vsnprintf(*ptr, ret+1, format, ap2);
1281
#ifndef HAVE_ASPRINTF
1282
int asprintf(char **ptr, const char *format, ...)
1288
va_start(ap, format);
1289
ret = vasprintf(ptr, format, ap);
1296
#ifdef TEST_SNPRINTF
1298
int sprintf(char *str,const char *fmt,...);
1299
int printf(const char *fmt,...);
1325
double fp_nums[] = { 6442452944.1234, -1.5, 134.21, 91340.2, 341.1234, 203.9, 0.96, 0.996,
1326
0.9996, 1.996, 4.136, 5.030201, 0.00205,
1341
long int_nums[] = { -1, 134, 91340, 341, 0203, 1234567890, 0};
1357
char *str_vals[] = {"hello", "a", "", "a longer string", NULL};
1358
#ifdef HAVE_LONG_LONG
1363
LLONG ll_nums[] = { 134, 91340, 341, 0203, 1234567890, 128006186140000000LL, 0};
1374
size_t ss_nums[] = {134, 91340, 123456789, 0203, 1234567890, 0};
1376
printf ("Testing snprintf format codes against system sprintf...\n");
1378
for (x = 0; fp_fmt[x] ; x++) {
1379
for (y = 0; fp_nums[y] != 0 ; y++) {
1380
buf1[0] = buf2[0] = '\0';
1381
l1 = snprintf(buf1, sizeof(buf1), fp_fmt[x], fp_nums[y]);
1382
l2 = sprintf (buf2, fp_fmt[x], fp_nums[y]);
1383
buf1[1023] = buf2[1023] = '\0';
1384
if (strcmp (buf1, buf2) || (l1 != l2)) {
1385
printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1386
fp_fmt[x], l1, buf1, l2, buf2);
1393
for (x = 0; int_fmt[x] ; x++) {
1394
for (y = 0; int_nums[y] != 0 ; y++) {
1395
buf1[0] = buf2[0] = '\0';
1396
l1 = snprintf(buf1, sizeof(buf1), int_fmt[x], int_nums[y]);
1397
l2 = sprintf (buf2, int_fmt[x], int_nums[y]);
1398
buf1[1023] = buf2[1023] = '\0';
1399
if (strcmp (buf1, buf2) || (l1 != l2)) {
1400
printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1401
int_fmt[x], l1, buf1, l2, buf2);
1408
for (x = 0; str_fmt[x] ; x++) {
1409
for (y = 0; str_vals[y] != 0 ; y++) {
1410
buf1[0] = buf2[0] = '\0';
1411
l1 = snprintf(buf1, sizeof(buf1), str_fmt[x], str_vals[y]);
1412
l2 = sprintf (buf2, str_fmt[x], str_vals[y]);
1413
buf1[1023] = buf2[1023] = '\0';
1414
if (strcmp (buf1, buf2) || (l1 != l2)) {
1415
printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1416
str_fmt[x], l1, buf1, l2, buf2);
1423
#ifdef HAVE_LONG_LONG
1424
for (x = 0; ll_fmt[x] ; x++) {
1425
for (y = 0; ll_nums[y] != 0 ; y++) {
1426
buf1[0] = buf2[0] = '\0';
1427
l1 = snprintf(buf1, sizeof(buf1), ll_fmt[x], ll_nums[y]);
1428
l2 = sprintf (buf2, ll_fmt[x], ll_nums[y]);
1429
buf1[1023] = buf2[1023] = '\0';
1430
if (strcmp (buf1, buf2) || (l1 != l2)) {
1431
printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1432
ll_fmt[x], l1, buf1, l2, buf2);
1442
buf1[0] = buf2[0] = '\0';
1443
if ((buf3 = malloc(BUFSZ)) == NULL) {
1447
memset(buf3, 'a', BUFSZ);
1448
snprintf(buf1, sizeof(buf1), "%.*s", 1, buf3);
1450
if (strcmp(buf1, "a") != 0) {
1451
printf("length limit buf1 '%s' expected 'a'\n", buf1);
1456
buf1[0] = buf2[0] = '\0';
1457
l1 = snprintf(buf1, sizeof(buf1), "%4$*1$d %2$s %3$*1$.*1$f", 3, "pos test", 12.3456, 9);
1458
l2 = sprintf(buf2, "%4$*1$d %2$s %3$*1$.*1$f", 3, "pos test", 12.3456, 9);
1459
buf1[1023] = buf2[1023] = '\0';
1460
if (strcmp(buf1, buf2) || (l1 != l2)) {
1461
printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1462
"%4$*1$d %2$s %3$*1$.*1$f", l1, buf1, l2, buf2);
1466
buf1[0] = buf2[0] = '\0';
1467
l1 = snprintf(buf1, sizeof(buf1), "%4$*4$d %2$s %3$*4$.*4$f", 3, "pos test", 12.3456, 9);
1468
l2 = sprintf(buf2, "%4$*4$d %2$s %3$*4$.*4$f", 3, "pos test", 12.3456, 9);
1469
buf1[1023] = buf2[1023] = '\0';
1470
if (strcmp(buf1, buf2)) {
1471
printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1472
"%4$*1$d %2$s %3$*1$.*1$f", l1, buf1, l2, buf2);
1476
for (x = 0; ss_fmt[x] ; x++) {
1477
for (y = 0; ss_nums[y] != 0 ; y++) {
1478
buf1[0] = buf2[0] = '\0';
1479
l1 = snprintf(buf1, sizeof(buf1), ss_fmt[x], ss_nums[y]);
1480
l2 = sprintf (buf2, ss_fmt[x], ss_nums[y]);
1481
buf1[1023] = buf2[1023] = '\0';
1482
if (strcmp (buf1, buf2) || (l1 != l2)) {
1483
printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1484
ss_fmt[x], l1, buf1, l2, buf2);
1491
buf1[0] = buf2[0] = '\0';
1492
l1 = snprintf(buf1, sizeof(buf1), "%lld", (LLONG)1234567890);
1493
l2 = sprintf(buf2, "%lld", (LLONG)1234567890);
1494
buf1[1023] = buf2[1023] = '\0';
1495
if (strcmp(buf1, buf2)) {
1496
printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1497
"%lld", l1, buf1, l2, buf2);
1501
buf1[0] = buf2[0] = '\0';
1502
l1 = snprintf(buf1, sizeof(buf1), "%Lf", (LDOUBLE)890.1234567890123);
1503
l2 = sprintf(buf2, "%Lf", (LDOUBLE)890.1234567890123);
1504
buf1[1023] = buf2[1023] = '\0';
1505
if (strcmp(buf1, buf2)) {
1506
printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1507
"%Lf", l1, buf1, l2, buf2);
1511
printf ("%d tests failed out of %d.\n", fail, num);
1513
printf("seeing how many digits we support\n");
1515
double v0 = 0.12345678901234567890123456789012345678901;
1516
for (x=0; x<100; x++) {
1517
double p = pow(10, x);
1519
snprintf(buf1, sizeof(buf1), "%1.1f", r);
1520
sprintf(buf2, "%1.1f", r);
1521
if (strcmp(buf1, buf2)) {
1522
printf("we seem to support %d digits\n", x-1);
1530
#endif /* TEST_SNPRINTF */