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 **************************************************************/
108 #ifdef TEST_SNPRINTF /* need math library headers for testing */
110 /* In test mode, we pretend that this system doesn't have any snprintf
111 * functions, regardless of what config.h says. */
112 # undef HAVE_SNPRINTF
113 # undef HAVE_VSNPRINTF
114 # undef HAVE_C99_VSNPRINTF
115 # undef HAVE_ASPRINTF
116 # undef HAVE_VASPRINTF
118 #endif /* TEST_SNPRINTF */
124 #ifdef HAVE_STRINGS_H
130 #include <sys/types.h>
136 #if defined(HAVE_SNPRINTF) && defined(HAVE_VSNPRINTF) && defined(HAVE_C99_VSNPRINTF)
137 /* only include stdio.h if we are not re-defining snprintf or vsnprintf */
139 /* make the compiler happy with an empty file */
140 void dummy_snprintf(void);
141 void dummy_snprintf(void) {}
142 #endif /* HAVE_SNPRINTF, etc */
144 /* yes this really must be a ||. Don't muck with this (tridge) */
145 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
147 #ifdef HAVE_LONG_DOUBLE
148 #define LDOUBLE long double
150 #define LDOUBLE double
153 #ifdef HAVE_LONG_LONG
154 #define LLONG long long
161 #define VA_COPY(dest, src) va_copy(dest, src)
163 #ifdef HAVE___VA_COPY
164 #define VA_COPY(dest, src) __va_copy(dest, src)
166 #define VA_COPY(dest, src) (dest) = (src)
171 * dopr(): poor man's version of doprintf
174 /* format read states */
175 #define DP_S_DEFAULT 0
184 /* format flags - Bits */
185 #define DP_F_MINUS (1 << 0)
186 #define DP_F_PLUS (1 << 1)
187 #define DP_F_SPACE (1 << 2)
188 #define DP_F_NUM (1 << 3)
189 #define DP_F_ZERO (1 << 4)
190 #define DP_F_UP (1 << 5)
191 #define DP_F_UNSIGNED (1 << 6)
193 /* Conversion Flags */
197 #define DP_C_LDOUBLE 4
202 #define CNK_FMT_STR 0
214 #define char_to_int(p) ((p)- '0')
216 #define MAX(p,q) (((p) >= (q)) ? (p) : (q))
220 int type; /* chunk type */
221 int num; /* parameter number */
232 struct pr_chunk *min_star;
233 struct pr_chunk *max_star;
234 struct pr_chunk *next;
238 struct pr_chunk **chunks;
242 static size_t dopr(char *buffer, size_t maxlen, const char *format,
244 static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
245 char *value, int flags, int min, int max);
246 static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
247 LLONG value, int base, int min, int max, int flags);
248 static void fmtfp(char *buffer, size_t *currlen, size_t maxlen,
249 LDOUBLE fvalue, int min, int max, int flags);
250 static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c);
251 static struct pr_chunk *new_chunk(void);
252 static int add_cnk_list_entry(struct pr_chunk_x **list,
253 int max_num, struct pr_chunk *chunk);
255 static size_t dopr(char *buffer, size_t maxlen, const char *format, va_list args_in)
265 struct pr_chunk *chunks = NULL;
266 struct pr_chunk *cnk = NULL;
267 struct pr_chunk_x *clist = NULL;
271 VA_COPY(args, args_in);
273 state = DP_S_DEFAULT;
282 /* retrieve the string structure as chunks */
283 while (state != DP_S_DONE) {
291 cnk->next = new_chunk();
297 if (!chunks) chunks = cnk;
303 cnk->type = CNK_FMT_STR;
304 cnk->start = format - base -1;
305 while ((ch != '\0') && (ch != '%')) ch = *format++;
306 cnk->len = format - base - cnk->start -1;
312 cnk->flags |= DP_F_MINUS;
316 cnk->flags |= DP_F_PLUS;
320 cnk->flags |= DP_F_SPACE;
324 cnk->flags |= DP_F_NUM;
328 cnk->flags |= DP_F_ZERO;
332 /* internationalization not supported yet */
341 if (isdigit((unsigned char)ch)) {
342 cnk->min = 10 * cnk->min + char_to_int (ch);
344 } else if (ch == '$') {
345 if (!pfirst && !pflag) {
346 /* parameters must be all positioned or none */
353 if (cnk->min == 0) /* what ?? */
358 } else if (ch == '*') {
359 if (pfirst) pfirst = 0;
360 cnk->min_star = new_chunk();
361 if (!cnk->min_star) /* out of memory :-( */
363 cnk->min_star->type = CNK_INT;
367 if (!isdigit((unsigned char)ch)) {
368 /* parameters must be all positioned or none */
371 for (num = 0; isdigit((unsigned char)ch); ch = *format++) {
372 num = 10 * num + char_to_int(ch);
374 cnk->min_star->num = num;
375 if (ch != '$') /* what ?? */
378 cnk->min_star->num = ++pnum;
380 max_pos = add_cnk_list_entry(&clist, max_pos, cnk->min_star);
381 if (max_pos == 0) /* out of memory :-( */
386 if (pfirst) pfirst = 0;
399 if (isdigit((unsigned char)ch)) {
402 cnk->max = 10 * cnk->max + char_to_int (ch);
404 } else if (ch == '$') {
405 if (!pfirst && !pflag) {
406 /* parameters must be all positioned or none */
409 if (cnk->max <= 0) /* what ?? */
414 } else if (ch == '*') {
415 cnk->max_star = new_chunk();
416 if (!cnk->max_star) /* out of memory :-( */
418 cnk->max_star->type = CNK_INT;
422 if (!isdigit((unsigned char)ch)) {
423 /* parameters must be all positioned or none */
426 for (num = 0; isdigit((unsigned char)ch); ch = *format++) {
427 num = 10 * num + char_to_int(ch);
429 cnk->max_star->num = num;
430 if (ch != '$') /* what ?? */
433 cnk->max_star->num = ++pnum;
435 max_pos = add_cnk_list_entry(&clist, max_pos, cnk->max_star);
436 if (max_pos == 0) /* out of memory :-( */
448 cnk->cflags = DP_C_SHORT;
451 cnk->cflags = DP_C_CHAR;
456 cnk->cflags = DP_C_LONG;
458 if (ch == 'l') { /* It's a long long */
459 cnk->cflags = DP_C_LLONG;
464 cnk->cflags = DP_C_LDOUBLE;
468 cnk->cflags = DP_C_SIZET;
477 if (cnk->num == 0) cnk->num = ++pnum;
478 max_pos = add_cnk_list_entry(&clist, max_pos, cnk);
479 if (max_pos == 0) /* out of memory :-( */
488 cnk->type = CNK_OCTAL;
489 cnk->flags |= DP_F_UNSIGNED;
492 cnk->type = CNK_UINT;
493 cnk->flags |= DP_F_UNSIGNED;
496 cnk->flags |= DP_F_UP;
499 cnk->flags |= DP_F_UNSIGNED;
502 /* hex float not supported yet */
506 cnk->flags |= DP_F_UP;
508 /* hex float not supported yet */
512 cnk->type = CNK_FLOAT;
515 cnk->type = CNK_CHAR;
518 cnk->type = CNK_STRING;
527 cnk->type = CNK_PRCNT;
530 /* Unknown, bail out*/
534 state = DP_S_DEFAULT;
540 break; /* some picky compilers need this */
544 /* retieve the format arguments */
545 for (pnum = 0; pnum < max_pos; pnum++) {
548 if (clist[pnum].num == 0) {
549 /* ignoring a parameter should not be permitted
550 * all parameters must be matched at least once
551 * BUT seem some system ignore this rule ...
552 * at least my glibc based system does --SSS
554 #ifdef DEBUG_SNPRINTF
555 printf("parameter at position %d not used\n", pnum+1);
557 /* eat the parameter */
561 for (i = 1; i < clist[pnum].num; i++) {
562 if (clist[pnum].chunks[0]->type != clist[pnum].chunks[i]->type) {
564 * all the references to a parameter
565 * must be of the same type
570 cnk = clist[pnum].chunks[0];
573 if (cnk->cflags == DP_C_SHORT)
574 cnk->value = va_arg (args, int);
575 else if (cnk->cflags == DP_C_LONG)
576 cnk->value = va_arg (args, long int);
577 else if (cnk->cflags == DP_C_LLONG)
578 cnk->value = va_arg (args, LLONG);
579 else if (cnk->cflags == DP_C_SIZET)
580 cnk->value = va_arg (args, ssize_t);
582 cnk->value = va_arg (args, int);
584 for (i = 1; i < clist[pnum].num; i++) {
585 clist[pnum].chunks[i]->value = cnk->value;
592 if (cnk->cflags == DP_C_SHORT)
593 cnk->value = va_arg (args, unsigned int);
594 else if (cnk->cflags == DP_C_LONG)
595 cnk->value = (unsigned long int)va_arg (args, unsigned long int);
596 else if (cnk->cflags == DP_C_LLONG)
597 cnk->value = (LLONG)va_arg (args, unsigned LLONG);
598 else if (cnk->cflags == DP_C_SIZET)
599 cnk->value = (size_t)va_arg (args, size_t);
601 cnk->value = (unsigned int)va_arg (args, unsigned int);
603 for (i = 1; i < clist[pnum].num; i++) {
604 clist[pnum].chunks[i]->value = cnk->value;
609 if (cnk->cflags == DP_C_LDOUBLE)
610 cnk->fvalue = va_arg (args, LDOUBLE);
612 cnk->fvalue = va_arg (args, double);
614 for (i = 1; i < clist[pnum].num; i++) {
615 clist[pnum].chunks[i]->fvalue = cnk->fvalue;
620 cnk->value = va_arg (args, int);
622 for (i = 1; i < clist[pnum].num; i++) {
623 clist[pnum].chunks[i]->value = cnk->value;
628 cnk->strvalue = va_arg (args, char *);
629 if (!cnk->strvalue) cnk->strvalue = "(NULL)";
631 for (i = 1; i < clist[pnum].num; i++) {
632 clist[pnum].chunks[i]->strvalue = cnk->strvalue;
637 cnk->strvalue = va_arg (args, void *);
638 for (i = 1; i < clist[pnum].num; i++) {
639 clist[pnum].chunks[i]->strvalue = cnk->strvalue;
644 if (cnk->cflags == DP_C_CHAR)
645 cnk->pnum = va_arg (args, char *);
646 else if (cnk->cflags == DP_C_SHORT)
647 cnk->pnum = va_arg (args, short int *);
648 else if (cnk->cflags == DP_C_LONG)
649 cnk->pnum = va_arg (args, long int *);
650 else if (cnk->cflags == DP_C_LLONG)
651 cnk->pnum = va_arg (args, LLONG *);
652 else if (cnk->cflags == DP_C_SIZET)
653 cnk->pnum = va_arg (args, ssize_t *);
655 cnk->pnum = va_arg (args, int *);
657 for (i = 1; i < clist[pnum].num; i++) {
658 clist[pnum].chunks[i]->pnum = cnk->pnum;
670 /* print out the actual string from chunks */
676 if (cnk->min_star) min = cnk->min_star->value;
678 if (cnk->max_star) max = cnk->max_star->value;
684 if (maxlen != 0 && maxlen > currlen) {
685 if (maxlen > (currlen + cnk->len)) len = cnk->len;
686 else len = maxlen - currlen;
688 memcpy(&(buffer[currlen]), &(base[cnk->start]), len);
696 fmtint (buffer, &currlen, maxlen, cnk->value, 10, min, max, cnk->flags);
700 fmtint (buffer, &currlen, maxlen, cnk->value, 8, min, max, cnk->flags);
704 fmtint (buffer, &currlen, maxlen, cnk->value, 16, min, max, cnk->flags);
708 fmtfp (buffer, &currlen, maxlen, cnk->fvalue, min, max, cnk->flags);
712 dopr_outch (buffer, &currlen, maxlen, cnk->value);
717 max = strlen(cnk->strvalue);
719 fmtstr (buffer, &currlen, maxlen, cnk->strvalue, cnk->flags, min, max);
723 fmtint (buffer, &currlen, maxlen, (long)(cnk->strvalue), 16, min, max, cnk->flags);
727 if (cnk->cflags == DP_C_CHAR)
728 *((char *)(cnk->pnum)) = (char)currlen;
729 else if (cnk->cflags == DP_C_SHORT)
730 *((short int *)(cnk->pnum)) = (short int)currlen;
731 else if (cnk->cflags == DP_C_LONG)
732 *((long int *)(cnk->pnum)) = (long int)currlen;
733 else if (cnk->cflags == DP_C_LLONG)
734 *((LLONG *)(cnk->pnum)) = (LLONG)currlen;
735 else if (cnk->cflags == DP_C_SIZET)
736 *((ssize_t *)(cnk->pnum)) = (ssize_t)currlen;
738 *((int *)(cnk->pnum)) = (int)currlen;
742 dopr_outch (buffer, &currlen, maxlen, '%');
752 if (currlen < maxlen - 1)
753 buffer[currlen] = '\0';
755 buffer[maxlen - 1] = '\0';
766 for (pnum = 0; pnum < max_pos; pnum++) {
767 if (clist[pnum].chunks) free(clist[pnum].chunks);
774 static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
775 char *value, int flags, int min, int max)
777 int padlen, strln; /* amount to pad */
780 #ifdef DEBUG_SNPRINTF
781 printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value);
787 for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */
788 padlen = min - strln;
791 if (flags & DP_F_MINUS)
792 padlen = -padlen; /* Left Justify */
795 dopr_outch (buffer, currlen, maxlen, ' ');
798 while (*value && (cnt < max)) {
799 dopr_outch (buffer, currlen, maxlen, *value++);
803 dopr_outch (buffer, currlen, maxlen, ' ');
808 /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
810 static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
811 LLONG value, int base, int min, int max, int flags)
814 unsigned LLONG uvalue;
817 int spadlen = 0; /* amount to space pad */
818 int zpadlen = 0; /* amount to zero pad */
826 if(!(flags & DP_F_UNSIGNED)) {
831 if (flags & DP_F_PLUS) /* Do a sign (+/i) */
833 else if (flags & DP_F_SPACE)
838 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
842 (caps? "0123456789ABCDEF":"0123456789abcdef")
843 [uvalue % (unsigned)base ];
844 uvalue = (uvalue / (unsigned)base );
845 } while(uvalue && (place < 20));
846 if (place == 20) place--;
849 zpadlen = max - place;
850 spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
851 if (zpadlen < 0) zpadlen = 0;
852 if (spadlen < 0) spadlen = 0;
853 if (flags & DP_F_ZERO) {
854 zpadlen = MAX(zpadlen, spadlen);
857 if (flags & DP_F_MINUS)
858 spadlen = -spadlen; /* Left Justifty */
860 #ifdef DEBUG_SNPRINTF
861 printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
862 zpadlen, spadlen, min, max, place);
866 while (spadlen > 0) {
867 dopr_outch (buffer, currlen, maxlen, ' ');
873 dopr_outch (buffer, currlen, maxlen, signvalue);
877 while (zpadlen > 0) {
878 dopr_outch (buffer, currlen, maxlen, '0');
885 dopr_outch (buffer, currlen, maxlen, convert[--place]);
887 /* Left Justified spaces */
888 while (spadlen < 0) {
889 dopr_outch (buffer, currlen, maxlen, ' ');
894 static LDOUBLE abs_val(LDOUBLE value)
896 LDOUBLE result = value;
904 static LDOUBLE POW10(int exp)
916 static LLONG ROUND(LDOUBLE value)
920 intpart = (LLONG)value;
921 value = value - intpart;
922 if (value >= 0.5) intpart++;
927 /* a replacement for modf that doesn't need the math library. Should
928 be portable, but slow */
929 static double my_modf(double x0, double *iptr)
936 for (i=0;i<100;i++) {
938 if (l <= (x+1) && l >= (x-1)) break;
944 /* yikes! the number is beyond what we can handle. What do we do? */
953 ret = my_modf(x0-l*f, &i2);
963 static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
964 LDOUBLE fvalue, int min, int max, int flags)
972 int padlen = 0; /* amount to pad */
981 * AIX manpage says the default is 0, but Solaris says the default
982 * is 6, and sprintf on AIX defaults to 6
987 ufvalue = abs_val (fvalue);
992 if (flags & DP_F_PLUS) { /* Do a sign (+/i) */
995 if (flags & DP_F_SPACE)
1001 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
1005 if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */
1009 * Sorry, we only support 9 digits past the decimal because of our
1015 /* We "cheat" by converting the fractional part to integer by
1016 * multiplying by a factor of 10
1020 my_modf(temp, &intpart);
1022 fracpart = ROUND((POW10(max)) * (ufvalue - intpart));
1024 if (fracpart >= POW10(max)) {
1026 fracpart -= POW10(max);
1030 /* Convert integer part */
1033 my_modf(temp, &intpart);
1034 idx = (int) ((temp -intpart +0.05)* 10.0);
1035 /* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */
1036 /* printf ("%llf, %f, %x\n", temp, intpart, idx); */
1037 iconvert[iplace++] =
1038 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
1039 } while (intpart && (iplace < 311));
1040 if (iplace == 311) iplace--;
1041 iconvert[iplace] = 0;
1043 /* Convert fractional part */
1047 temp = fracpart*0.1;
1048 my_modf(temp, &fracpart);
1049 idx = (int) ((temp -fracpart +0.05)* 10.0);
1050 /* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */
1051 /* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */
1052 fconvert[fplace++] =
1053 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
1054 } while(fracpart && (fplace < 311));
1055 if (fplace == 311) fplace--;
1057 fconvert[fplace] = 0;
1059 /* -1 for decimal point, another -1 if we are printing a sign */
1060 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
1061 zpadlen = max - fplace;
1062 if (zpadlen < 0) zpadlen = 0;
1065 if (flags & DP_F_MINUS)
1066 padlen = -padlen; /* Left Justifty */
1068 if ((flags & DP_F_ZERO) && (padlen > 0)) {
1070 dopr_outch (buffer, currlen, maxlen, signvalue);
1074 while (padlen > 0) {
1075 dopr_outch (buffer, currlen, maxlen, '0');
1079 while (padlen > 0) {
1080 dopr_outch (buffer, currlen, maxlen, ' ');
1084 dopr_outch (buffer, currlen, maxlen, signvalue);
1087 dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);
1089 #ifdef DEBUG_SNPRINTF
1090 printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen);
1094 * Decimal point. This should probably use locale to find the correct
1095 * char to print out.
1098 dopr_outch (buffer, currlen, maxlen, '.');
1100 while (zpadlen > 0) {
1101 dopr_outch (buffer, currlen, maxlen, '0');
1106 dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
1109 while (padlen < 0) {
1110 dopr_outch (buffer, currlen, maxlen, ' ');
1115 static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c)
1117 if (*currlen < maxlen) {
1118 buffer[(*currlen)] = c;
1123 static struct pr_chunk *new_chunk(void) {
1124 struct pr_chunk *new_c = (struct pr_chunk *)malloc(sizeof(struct pr_chunk));
1132 new_c->min_star = NULL;
1134 new_c->max_star = NULL;
1141 new_c->strvalue = NULL;
1148 static int add_cnk_list_entry(struct pr_chunk_x **list,
1149 int max_num, struct pr_chunk *chunk) {
1150 struct pr_chunk_x *l;
1151 struct pr_chunk **c;
1156 if (chunk->num > max_num) {
1159 if (*list == NULL) {
1160 l = (struct pr_chunk_x *)malloc(sizeof(struct pr_chunk_x) * max);
1163 l = (struct pr_chunk_x *)realloc(*list, sizeof(struct pr_chunk_x) * max);
1167 for (i = 0; i < max; i++) {
1168 if ((*list)[i].chunks) free((*list)[i].chunks);
1172 for (i = pos; i < max; i++) {
1182 cnum = l[i].num + 1;
1183 if (l[i].chunks == NULL) {
1184 c = (struct pr_chunk **)malloc(sizeof(struct pr_chunk *) * cnum);
1186 c = (struct pr_chunk **)realloc(l[i].chunks, sizeof(struct pr_chunk *) * cnum);
1189 for (i = 0; i < max; i++) {
1190 if (l[i].chunks) free(l[i].chunks);
1194 c[l[i].num] = chunk;
1202 int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
1204 return dopr(str, count, fmt, args);
1208 /* yes this really must be a ||. Don't muck with this (tridge)
1210 * The logic for these two is that we need our own definition if the
1211 * OS *either* has no definition of *sprintf, or if it does have one
1212 * that doesn't work properly according to the autoconf test.
1214 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
1215 int snprintf(char *str,size_t count,const char *fmt,...)
1221 ret = vsnprintf(str, count, fmt, ap);
1229 #ifndef HAVE_VASPRINTF
1230 int vasprintf(char **ptr, const char *format, va_list ap)
1237 ret = vsnprintf(NULL, 0, format, ap2);
1238 if (ret <= 0) return ret;
1240 (*ptr) = (char *)malloc(ret+1);
1241 if (!*ptr) return -1;
1245 ret = vsnprintf(*ptr, ret+1, format, ap2);
1252 #ifndef HAVE_ASPRINTF
1253 int asprintf(char **ptr, const char *format, ...)
1259 va_start(ap, format);
1260 ret = vasprintf(ptr, format, ap);
1267 #ifdef TEST_SNPRINTF
1269 int sprintf(char *str,const char *fmt,...);
1270 int printf(const char *fmt,...);
1296 double fp_nums[] = { 6442452944.1234, -1.5, 134.21, 91340.2, 341.1234, 203.9, 0.96, 0.996,
1297 0.9996, 1.996, 4.136, 5.030201, 0.00205,
1312 long int_nums[] = { -1, 134, 91340, 341, 0203, 1234567890, 0};
1328 char *str_vals[] = {"hello", "a", "", "a longer string", NULL};
1329 #ifdef HAVE_LONG_LONG
1334 LLONG ll_nums[] = { 134, 91340, 341, 0203, 1234567890, 128006186140000000LL, 0};
1345 size_t ss_nums[] = {134, 91340, 123456789, 0203, 1234567890, 0};
1347 printf ("Testing snprintf format codes against system sprintf...\n");
1349 for (x = 0; fp_fmt[x] ; x++) {
1350 for (y = 0; fp_nums[y] != 0 ; y++) {
1351 buf1[0] = buf2[0] = '\0';
1352 l1 = snprintf(buf1, sizeof(buf1), fp_fmt[x], fp_nums[y]);
1353 l2 = sprintf (buf2, fp_fmt[x], fp_nums[y]);
1354 buf1[1023] = buf2[1023] = '\0';
1355 if (strcmp (buf1, buf2) || (l1 != l2)) {
1356 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1357 fp_fmt[x], l1, buf1, l2, buf2);
1364 for (x = 0; int_fmt[x] ; x++) {
1365 for (y = 0; int_nums[y] != 0 ; y++) {
1366 buf1[0] = buf2[0] = '\0';
1367 l1 = snprintf(buf1, sizeof(buf1), int_fmt[x], int_nums[y]);
1368 l2 = sprintf (buf2, int_fmt[x], int_nums[y]);
1369 buf1[1023] = buf2[1023] = '\0';
1370 if (strcmp (buf1, buf2) || (l1 != l2)) {
1371 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1372 int_fmt[x], l1, buf1, l2, buf2);
1379 for (x = 0; str_fmt[x] ; x++) {
1380 for (y = 0; str_vals[y] != 0 ; y++) {
1381 buf1[0] = buf2[0] = '\0';
1382 l1 = snprintf(buf1, sizeof(buf1), str_fmt[x], str_vals[y]);
1383 l2 = sprintf (buf2, str_fmt[x], str_vals[y]);
1384 buf1[1023] = buf2[1023] = '\0';
1385 if (strcmp (buf1, buf2) || (l1 != l2)) {
1386 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1387 str_fmt[x], l1, buf1, l2, buf2);
1394 #ifdef HAVE_LONG_LONG
1395 for (x = 0; ll_fmt[x] ; x++) {
1396 for (y = 0; ll_nums[y] != 0 ; y++) {
1397 buf1[0] = buf2[0] = '\0';
1398 l1 = snprintf(buf1, sizeof(buf1), ll_fmt[x], ll_nums[y]);
1399 l2 = sprintf (buf2, ll_fmt[x], ll_nums[y]);
1400 buf1[1023] = buf2[1023] = '\0';
1401 if (strcmp (buf1, buf2) || (l1 != l2)) {
1402 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1403 ll_fmt[x], l1, buf1, l2, buf2);
1413 buf1[0] = buf2[0] = '\0';
1414 if ((buf3 = malloc(BUFSZ)) == NULL) {
1418 memset(buf3, 'a', BUFSZ);
1419 snprintf(buf1, sizeof(buf1), "%.*s", 1, buf3);
1421 if (strcmp(buf1, "a") != 0) {
1422 printf("length limit buf1 '%s' expected 'a'\n", buf1);
1427 buf1[0] = buf2[0] = '\0';
1428 l1 = snprintf(buf1, sizeof(buf1), "%4$*1$d %2$s %3$*1$.*1$f", 3, "pos test", 12.3456, 9);
1429 l2 = sprintf(buf2, "%4$*1$d %2$s %3$*1$.*1$f", 3, "pos test", 12.3456, 9);
1430 buf1[1023] = buf2[1023] = '\0';
1431 if (strcmp(buf1, buf2) || (l1 != l2)) {
1432 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1433 "%4$*1$d %2$s %3$*1$.*1$f", l1, buf1, l2, buf2);
1437 buf1[0] = buf2[0] = '\0';
1438 l1 = snprintf(buf1, sizeof(buf1), "%4$*4$d %2$s %3$*4$.*4$f", 3, "pos test", 12.3456, 9);
1439 l2 = sprintf(buf2, "%4$*4$d %2$s %3$*4$.*4$f", 3, "pos test", 12.3456, 9);
1440 buf1[1023] = buf2[1023] = '\0';
1441 if (strcmp(buf1, buf2)) {
1442 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1443 "%4$*1$d %2$s %3$*1$.*1$f", l1, buf1, l2, buf2);
1447 for (x = 0; ss_fmt[x] ; x++) {
1448 for (y = 0; ss_nums[y] != 0 ; y++) {
1449 buf1[0] = buf2[0] = '\0';
1450 l1 = snprintf(buf1, sizeof(buf1), ss_fmt[x], ss_nums[y]);
1451 l2 = sprintf (buf2, ss_fmt[x], ss_nums[y]);
1452 buf1[1023] = buf2[1023] = '\0';
1453 if (strcmp (buf1, buf2) || (l1 != l2)) {
1454 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1455 ss_fmt[x], l1, buf1, l2, buf2);
1462 buf1[0] = buf2[0] = '\0';
1463 l1 = snprintf(buf1, sizeof(buf1), "%lld", (LLONG)1234567890);
1464 l2 = sprintf(buf2, "%lld", (LLONG)1234567890);
1465 buf1[1023] = buf2[1023] = '\0';
1466 if (strcmp(buf1, buf2)) {
1467 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1468 "%lld", l1, buf1, l2, buf2);
1472 buf1[0] = buf2[0] = '\0';
1473 l1 = snprintf(buf1, sizeof(buf1), "%Lf", (LDOUBLE)890.1234567890123);
1474 l2 = sprintf(buf2, "%Lf", (LDOUBLE)890.1234567890123);
1475 buf1[1023] = buf2[1023] = '\0';
1476 if (strcmp(buf1, buf2)) {
1477 printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n",
1478 "%Lf", l1, buf1, l2, buf2);
1482 printf ("%d tests failed out of %d.\n", fail, num);
1484 printf("seeing how many digits we support\n");
1486 double v0 = 0.12345678901234567890123456789012345678901;
1487 for (x=0; x<100; x++) {
1488 double p = pow(10, x);
1490 snprintf(buf1, sizeof(buf1), "%1.1f", r);
1491 sprintf(buf2, "%1.1f", r);
1492 if (strcmp(buf1, buf2)) {
1493 printf("we seem to support %d digits\n", x-1);
1501 #endif /* TEST_SNPRINTF */