source: branches/samba-3.0/source/lib/replace/snprintf.c

Last change on this file was 1, checked in by Paul Smedley, 18 years ago

Initial code import
File size: 35.3 KB
Line 
1/*
2 * NOTE: If you change this file, please merge it into rsync, samba, etc.
3 */
4
5/*
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
10 */
11
12/**************************************************************
13 * Original:
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...
18 *
19 * snprintf() is used instead of sprintf() as it does limit checks
20 * for string length. This covers a nasty loophole.
21 *
22 * The other functions are there to prevent NULL pointers from
23 * causing nast effects.
24 *
25 * More Recently:
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.
31 *
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.
42 *
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.
46 *
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.
51 *
52 * Andrew Tridgell (tridge@samba.org) Oct 1998
53 * fixed handling of %.0f
54 * added test for HAVE_LONG_DOUBLE
55 *
56 * tridge@samba.org, idra@samba.org, April 2001
57 * got rid of fcvt code (twas buggy and made testing harder)
58 * added C99 semantics
59 *
60 * date: 2002/12/19 19:56:31; author: herb; state: Exp; lines: +2 -0
61 * actually print args for %g and %e
62 *
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.
67 *
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
70 * functions
71 *
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
74 * when it exists.
75 *
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.
81 *
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.
86 *
87 * Martin Pool (mbp@samba.org) May 2003
88 * Put in a prototype for dummy_snprintf() to quiet compiler warnings.
89 *
90 * Move #endif to make sure VA_COPY, LDOUBLE, etc are defined even
91 * if the C library has some snprintf functions already.
92 *
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.
98 *
99 * Simo Sorce (idra@samba.org) Jan 2006
100 *
101 * Add support for position independent parameters
102 * fix fmtstr now it conforms to sprintf wrt min.max
103 *
104 **************************************************************/
105
106#include "replace.h"
107#include "system/locale.h"
108
109#ifdef TEST_SNPRINTF /* need math library headers for testing */
110
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
118# include <math.h>
119#endif /* TEST_SNPRINTF */
120
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 */
123#include <stdio.h>
124 /* make the compiler happy with an empty file */
125 void dummy_snprintf(void);
126 void dummy_snprintf(void) {}
127#endif /* HAVE_SNPRINTF, etc */
128
129/* yes this really must be a ||. Don't muck with this (tridge) */
130#if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
131
132#ifdef HAVE_LONG_DOUBLE
133#define LDOUBLE long double
134#else
135#define LDOUBLE double
136#endif
137
138#ifdef HAVE_LONG_LONG
139#define LLONG long long
140#else
141#define LLONG long
142#endif
143
144#ifndef VA_COPY
145#ifdef HAVE_VA_COPY
146#define VA_COPY(dest, src) va_copy(dest, src)
147#else
148#ifdef HAVE___VA_COPY
149#define VA_COPY(dest, src) __va_copy(dest, src)
150#else
151#define VA_COPY(dest, src) (dest) = (src)
152#endif
153#endif
154
155/*
156 * dopr(): poor man's version of doprintf
157 */
158
159/* format read states */
160#define DP_S_DEFAULT 0
161#define DP_S_FLAGS 1
162#define DP_S_MIN 2
163#define DP_S_DOT 3
164#define DP_S_MAX 4
165#define DP_S_MOD 5
166#define DP_S_CONV 6
167#define DP_S_DONE 7
168
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)
177
178/* Conversion Flags */
179#define DP_C_CHAR 1
180#define DP_C_SHORT 2
181#define DP_C_LONG 3
182#define DP_C_LDOUBLE 4
183#define DP_C_LLONG 5
184#define DP_C_SIZET 6
185
186/* Chunk types */
187#define CNK_FMT_STR 0
188#define CNK_INT 1
189#define CNK_OCTAL 2
190#define CNK_UINT 3
191#define CNK_HEX 4
192#define CNK_FLOAT 5
193#define CNK_CHAR 6
194#define CNK_STRING 7
195#define CNK_PTR 8
196#define CNK_NUM 9
197#define CNK_PRCNT 10
198
199#define char_to_int(p) ((p)- '0')
200#ifndef MAX
201#define MAX(p,q) (((p) >= (q)) ? (p) : (q))
202#endif
203
204struct pr_chunk {
205 int type; /* chunk type */
206 int num; /* parameter number */
207 int min;
208 int max;
209 int flags;
210 int cflags;
211 int start;
212 int len;
213 LLONG value;
214 LDOUBLE fvalue;
215 char *strvalue;
216 void *pnum;
217 struct pr_chunk *min_star;
218 struct pr_chunk *max_star;
219 struct pr_chunk *next;
220};
221
222struct pr_chunk_x {
223 struct pr_chunk **chunks;
224 int num;
225};
226
227static int dopr(char *buffer, size_t maxlen, const char *format,
228 va_list args_in);
229static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
230 char *value, int flags, int min, int max);
231static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
232 LLONG value, int base, int min, int max, int flags);
233static void fmtfp(char *buffer, size_t *currlen, size_t maxlen,
234 LDOUBLE fvalue, int min, int max, int flags);
235static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c);
236static struct pr_chunk *new_chunk(void);
237static int add_cnk_list_entry(struct pr_chunk_x **list,
238 int max_num, struct pr_chunk *chunk);
239
240static int dopr(char *buffer, size_t maxlen, const char *format, va_list args_in)
241{
242 char ch;
243 int state;
244 int pflag;
245 int pnum;
246 int pfirst;
247 size_t currlen;
248 va_list args;
249 const char *base;
250 struct pr_chunk *chunks = NULL;
251 struct pr_chunk *cnk = NULL;
252 struct pr_chunk_x *clist = NULL;
253 int max_pos;
254 int ret = -1;
255
256 VA_COPY(args, args_in);
257
258 state = DP_S_DEFAULT;
259 pfirst = 1;
260 pflag = 0;
261 pnum = 0;
262
263 max_pos = 0;
264 base = format;
265 ch = *format++;
266
267 /* retrieve the string structure as chunks */
268 while (state != DP_S_DONE) {
269 if (ch == '\0')
270 state = DP_S_DONE;
271
272 switch(state) {
273 case DP_S_DEFAULT:
274
275 if (cnk) {
276 cnk->next = new_chunk();
277 cnk = cnk->next;
278 } else {
279 cnk = new_chunk();
280 }
281 if (!cnk) goto done;
282 if (!chunks) chunks = cnk;
283
284 if (ch == '%') {
285 state = DP_S_FLAGS;
286 ch = *format++;
287 } else {
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;
292 }
293 break;
294 case DP_S_FLAGS:
295 switch (ch) {
296 case '-':
297 cnk->flags |= DP_F_MINUS;
298 ch = *format++;
299 break;
300 case '+':
301 cnk->flags |= DP_F_PLUS;
302 ch = *format++;
303 break;
304 case ' ':
305 cnk->flags |= DP_F_SPACE;
306 ch = *format++;
307 break;
308 case '#':
309 cnk->flags |= DP_F_NUM;
310 ch = *format++;
311 break;
312 case '0':
313 cnk->flags |= DP_F_ZERO;
314 ch = *format++;
315 break;
316 case 'I':
317 /* internationalization not supported yet */
318 ch = *format++;
319 break;
320 default:
321 state = DP_S_MIN;
322 break;
323 }
324 break;
325 case DP_S_MIN:
326 if (isdigit((unsigned char)ch)) {
327 cnk->min = 10 * cnk->min + char_to_int (ch);
328 ch = *format++;
329 } else if (ch == '$') {
330 if (!pfirst && !pflag) {
331 /* parameters must be all positioned or none */
332 goto done;
333 }
334 if (pfirst) {
335 pfirst = 0;
336 pflag = 1;
337 }
338 if (cnk->min == 0) /* what ?? */
339 goto done;
340 cnk->num = cnk->min;
341 cnk->min = 0;
342 ch = *format++;
343 } else if (ch == '*') {
344 if (pfirst) pfirst = 0;
345 cnk->min_star = new_chunk();
346 if (!cnk->min_star) /* out of memory :-( */
347 goto done;
348 cnk->min_star->type = CNK_INT;
349 if (pflag) {
350 int num;
351 ch = *format++;
352 if (!isdigit((unsigned char)ch)) {
353 /* parameters must be all positioned or none */
354 goto done;
355 }
356 for (num = 0; isdigit((unsigned char)ch); ch = *format++) {
357 num = 10 * num + char_to_int(ch);
358 }
359 cnk->min_star->num = num;
360 if (ch != '$') /* what ?? */
361 goto done;
362 } else {
363 cnk->min_star->num = ++pnum;
364 }
365 max_pos = add_cnk_list_entry(&clist, max_pos, cnk->min_star);
366 if (max_pos == 0) /* out of memory :-( */
367 goto done;
368 ch = *format++;
369 state = DP_S_DOT;
370 } else {
371 if (pfirst) pfirst = 0;
372 state = DP_S_DOT;
373 }
374 break;
375 case DP_S_DOT:
376 if (ch == '.') {
377 state = DP_S_MAX;
378 ch = *format++;
379 } else {
380 state = DP_S_MOD;
381 }
382 break;
383 case DP_S_MAX:
384 if (isdigit((unsigned char)ch)) {
385 if (cnk->max < 0)
386 cnk->max = 0;
387 cnk->max = 10 * cnk->max + char_to_int (ch);
388 ch = *format++;
389 } else if (ch == '$') {
390 if (!pfirst && !pflag) {
391 /* parameters must be all positioned or none */
392 goto done;
393 }
394 if (cnk->max <= 0) /* what ?? */
395 goto done;
396 cnk->num = cnk->max;
397 cnk->max = -1;
398 ch = *format++;
399 } else if (ch == '*') {
400 cnk->max_star = new_chunk();
401 if (!cnk->max_star) /* out of memory :-( */
402 goto done;
403 cnk->max_star->type = CNK_INT;
404 if (pflag) {
405 int num;
406 ch = *format++;
407 if (!isdigit((unsigned char)ch)) {
408 /* parameters must be all positioned or none */
409 goto done;
410 }
411 for (num = 0; isdigit((unsigned char)ch); ch = *format++) {
412 num = 10 * num + char_to_int(ch);
413 }
414 cnk->max_star->num = num;
415 if (ch != '$') /* what ?? */
416 goto done;
417 } else {
418 cnk->max_star->num = ++pnum;
419 }
420 max_pos = add_cnk_list_entry(&clist, max_pos, cnk->max_star);
421 if (max_pos == 0) /* out of memory :-( */
422 goto done;
423
424 ch = *format++;
425 state = DP_S_MOD;
426 } else {
427 state = DP_S_MOD;
428 }
429 break;
430 case DP_S_MOD:
431 switch (ch) {
432 case 'h':
433 cnk->cflags = DP_C_SHORT;
434 ch = *format++;
435 if (ch == 'h') {
436 cnk->cflags = DP_C_CHAR;
437 ch = *format++;
438 }
439 break;
440 case 'l':
441 cnk->cflags = DP_C_LONG;
442 ch = *format++;
443 if (ch == 'l') { /* It's a long long */
444 cnk->cflags = DP_C_LLONG;
445 ch = *format++;
446 }
447 break;
448 case 'L':
449 cnk->cflags = DP_C_LDOUBLE;
450 ch = *format++;
451 break;
452 case 'z':
453 cnk->cflags = DP_C_SIZET;
454 ch = *format++;
455 break;
456 default:
457 break;
458 }
459 state = DP_S_CONV;
460 break;
461 case DP_S_CONV:
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 :-( */
465 goto done;
466
467 switch (ch) {
468 case 'd':
469 case 'i':
470 cnk->type = CNK_INT;
471 break;
472 case 'o':
473 cnk->type = CNK_OCTAL;
474 cnk->flags |= DP_F_UNSIGNED;
475 break;
476 case 'u':
477 cnk->type = CNK_UINT;
478 cnk->flags |= DP_F_UNSIGNED;
479 break;
480 case 'X':
481 cnk->flags |= DP_F_UP;
482 case 'x':
483 cnk->type = CNK_HEX;
484 cnk->flags |= DP_F_UNSIGNED;
485 break;
486 case 'A':
487 /* hex float not supported yet */
488 case 'E':
489 case 'G':
490 case 'F':
491 cnk->flags |= DP_F_UP;
492 case 'a':
493 /* hex float not supported yet */
494 case 'e':
495 case 'f':
496 case 'g':
497 cnk->type = CNK_FLOAT;
498 break;
499 case 'c':
500 cnk->type = CNK_CHAR;
501 break;
502 case 's':
503 cnk->type = CNK_STRING;
504 break;
505 case 'p':
506 cnk->type = CNK_PTR;
507 break;
508 case 'n':
509 cnk->type = CNK_NUM;
510 break;
511 case '%':
512 cnk->type = CNK_PRCNT;
513 break;
514 default:
515 /* Unknown, bail out*/
516 goto done;
517 }
518 ch = *format++;
519 state = DP_S_DEFAULT;
520 break;
521 case DP_S_DONE:
522 break;
523 default:
524 /* hmm? */
525 break; /* some picky compilers need this */
526 }
527 }
528
529 /* retieve the format arguments */
530 for (pnum = 0; pnum < max_pos; pnum++) {
531 int i;
532
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
538 */
539#ifdef DEBUG_SNPRINTF
540 printf("parameter at position %d not used\n", pnum+1);
541#endif
542 /* eat the parameter */
543 va_arg (args, int);
544 continue;
545 }
546 for (i = 1; i < clist[pnum].num; i++) {
547 if (clist[pnum].chunks[0]->type != clist[pnum].chunks[i]->type) {
548 /* nooo noo no!
549 * all the references to a parameter
550 * must be of the same type
551 */
552 goto done;
553 }
554 }
555 cnk = clist[pnum].chunks[0];
556 switch (cnk->type) {
557 case CNK_INT:
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);
566 else
567 cnk->value = va_arg (args, int);
568
569 for (i = 1; i < clist[pnum].num; i++) {
570 clist[pnum].chunks[i]->value = cnk->value;
571 }
572 break;
573
574 case CNK_OCTAL:
575 case CNK_UINT:
576 case CNK_HEX:
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);
585 else
586 cnk->value = (unsigned int)va_arg (args, unsigned int);
587
588 for (i = 1; i < clist[pnum].num; i++) {
589 clist[pnum].chunks[i]->value = cnk->value;
590 }
591 break;
592
593 case CNK_FLOAT:
594 if (cnk->cflags == DP_C_LDOUBLE)
595 cnk->fvalue = va_arg (args, LDOUBLE);
596 else
597 cnk->fvalue = va_arg (args, double);
598
599 for (i = 1; i < clist[pnum].num; i++) {
600 clist[pnum].chunks[i]->fvalue = cnk->fvalue;
601 }
602 break;
603
604 case CNK_CHAR:
605 cnk->value = va_arg (args, int);
606
607 for (i = 1; i < clist[pnum].num; i++) {
608 clist[pnum].chunks[i]->value = cnk->value;
609 }
610 break;
611
612 case CNK_STRING:
613 cnk->strvalue = va_arg (args, char *);
614 if (!cnk->strvalue) cnk->strvalue = "(NULL)";
615
616 for (i = 1; i < clist[pnum].num; i++) {
617 clist[pnum].chunks[i]->strvalue = cnk->strvalue;
618 }
619 break;
620
621 case CNK_PTR:
622 cnk->strvalue = va_arg (args, void *);
623 for (i = 1; i < clist[pnum].num; i++) {
624 clist[pnum].chunks[i]->strvalue = cnk->strvalue;
625 }
626 break;
627
628 case CNK_NUM:
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 *);
639 else
640 cnk->pnum = va_arg (args, int *);
641
642 for (i = 1; i < clist[pnum].num; i++) {
643 clist[pnum].chunks[i]->pnum = cnk->pnum;
644 }
645 break;
646
647 case CNK_PRCNT:
648 break;
649
650 default:
651 /* what ?? */
652 goto done;
653 }
654 }
655 /* print out the actual string from chunks */
656 currlen = 0;
657 cnk = chunks;
658 while (cnk) {
659 int len, min, max;
660
661 if (cnk->min_star) min = cnk->min_star->value;
662 else min = cnk->min;
663 if (cnk->max_star) max = cnk->max_star->value;
664 else max = cnk->max;
665
666 switch (cnk->type) {
667
668 case CNK_FMT_STR:
669 if (maxlen != 0 && maxlen > currlen) {
670 if (maxlen > (currlen + cnk->len)) len = cnk->len;
671 else len = maxlen - currlen;
672
673 memcpy(&(buffer[currlen]), &(base[cnk->start]), len);
674 }
675 currlen += cnk->len;
676
677 break;
678
679 case CNK_INT:
680 case CNK_UINT:
681 fmtint (buffer, &currlen, maxlen, cnk->value, 10, min, max, cnk->flags);
682 break;
683
684 case CNK_OCTAL:
685 fmtint (buffer, &currlen, maxlen, cnk->value, 8, min, max, cnk->flags);
686 break;
687
688 case CNK_HEX:
689 fmtint (buffer, &currlen, maxlen, cnk->value, 16, min, max, cnk->flags);
690 break;
691
692 case CNK_FLOAT:
693 fmtfp (buffer, &currlen, maxlen, cnk->fvalue, min, max, cnk->flags);
694 break;
695
696 case CNK_CHAR:
697 dopr_outch (buffer, &currlen, maxlen, cnk->value);
698 break;
699
700 case CNK_STRING:
701 if (max == -1) {
702 max = strlen(cnk->strvalue);
703 }
704 fmtstr (buffer, &currlen, maxlen, cnk->strvalue, cnk->flags, min, max);
705 break;
706
707 case CNK_PTR:
708 fmtint (buffer, &currlen, maxlen, (long)(cnk->strvalue), 16, min, max, cnk->flags);
709 break;
710
711 case CNK_NUM:
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;
722 else
723 *((int *)(cnk->pnum)) = (int)currlen;
724 break;
725
726 case CNK_PRCNT:
727 dopr_outch (buffer, &currlen, maxlen, '%');
728 break;
729
730 default:
731 /* what ?? */
732 goto done;
733 }
734 cnk = cnk->next;
735 }
736 if (maxlen != 0) {
737 if (currlen < maxlen - 1)
738 buffer[currlen] = '\0';
739 else if (maxlen > 0)
740 buffer[maxlen - 1] = '\0';
741 }
742 ret = currlen;
743
744done:
745 va_end(args);
746
747 while (chunks) {
748 cnk = chunks->next;
749 free(chunks);
750 chunks = cnk;
751 }
752 if (clist) {
753 for (pnum = 0; pnum < max_pos; pnum++) {
754 if (clist[pnum].chunks) free(clist[pnum].chunks);
755 }
756 free(clist);
757 }
758 return ret;
759}
760
761static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
762 char *value, int flags, int min, int max)
763{
764 int padlen, strln; /* amount to pad */
765 int cnt = 0;
766
767#ifdef DEBUG_SNPRINTF
768 printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value);
769#endif
770 if (value == 0) {
771 value = "<NULL>";
772 }
773
774 for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */
775 padlen = min - strln;
776 if (padlen < 0)
777 padlen = 0;
778 if (flags & DP_F_MINUS)
779 padlen = -padlen; /* Left Justify */
780
781 while (padlen > 0) {
782 dopr_outch (buffer, currlen, maxlen, ' ');
783 --padlen;
784 }
785 while (*value && (cnt < max)) {
786 dopr_outch (buffer, currlen, maxlen, *value++);
787 ++cnt;
788 }
789 while (padlen < 0) {
790 dopr_outch (buffer, currlen, maxlen, ' ');
791 ++padlen;
792 }
793}
794
795/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
796
797static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
798 LLONG value, int base, int min, int max, int flags)
799{
800 int signvalue = 0;
801 unsigned LLONG uvalue;
802 char convert[20];
803 int place = 0;
804 int spadlen = 0; /* amount to space pad */
805 int zpadlen = 0; /* amount to zero pad */
806 int caps = 0;
807
808 if (max < 0)
809 max = 0;
810
811 uvalue = value;
812
813 if(!(flags & DP_F_UNSIGNED)) {
814 if( value < 0 ) {
815 signvalue = '-';
816 uvalue = -value;
817 } else {
818 if (flags & DP_F_PLUS) /* Do a sign (+/i) */
819 signvalue = '+';
820 else if (flags & DP_F_SPACE)
821 signvalue = ' ';
822 }
823 }
824
825 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
826
827 do {
828 convert[place++] =
829 (caps? "0123456789ABCDEF":"0123456789abcdef")
830 [uvalue % (unsigned)base ];
831 uvalue = (uvalue / (unsigned)base );
832 } while(uvalue && (place < 20));
833 if (place == 20) place--;
834 convert[place] = 0;
835
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);
842 spadlen = 0;
843 }
844 if (flags & DP_F_MINUS)
845 spadlen = -spadlen; /* Left Justifty */
846
847#ifdef DEBUG_SNPRINTF
848 printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
849 zpadlen, spadlen, min, max, place);
850#endif
851
852 /* Spaces */
853 while (spadlen > 0) {
854 dopr_outch (buffer, currlen, maxlen, ' ');
855 --spadlen;
856 }
857
858 /* Sign */
859 if (signvalue)
860 dopr_outch (buffer, currlen, maxlen, signvalue);
861
862 /* Zeros */
863 if (zpadlen > 0) {
864 while (zpadlen > 0) {
865 dopr_outch (buffer, currlen, maxlen, '0');
866 --zpadlen;
867 }
868 }
869
870 /* Digits */
871 while (place > 0)
872 dopr_outch (buffer, currlen, maxlen, convert[--place]);
873
874 /* Left Justified spaces */
875 while (spadlen < 0) {
876 dopr_outch (buffer, currlen, maxlen, ' ');
877 ++spadlen;
878 }
879}
880
881static LDOUBLE abs_val(LDOUBLE value)
882{
883 LDOUBLE result = value;
884
885 if (value < 0)
886 result = -value;
887
888 return result;
889}
890
891static LDOUBLE POW10(int exp)
892{
893 LDOUBLE result = 1;
894
895 while (exp) {
896 result *= 10;
897 exp--;
898 }
899
900 return result;
901}
902
903static LLONG ROUND(LDOUBLE value)
904{
905 LLONG intpart;
906
907 intpart = (LLONG)value;
908 value = value - intpart;
909 if (value >= 0.5) intpart++;
910
911 return intpart;
912}
913
914/* a replacement for modf that doesn't need the math library. Should
915 be portable, but slow */
916static double my_modf(double x0, double *iptr)
917{
918 int i;
919 LLONG l=0;
920 double x = x0;
921 double f = 1.0;
922
923 for (i=0;i<100;i++) {
924 l = (long)x;
925 if (l <= (x+1) && l >= (x-1)) break;
926 x *= 0.1;
927 f *= 10.0;
928 }
929
930 if (i == 100) {
931 /* yikes! the number is beyond what we can handle. What do we do? */
932 (*iptr) = 0;
933 return 0;
934 }
935
936 if (i != 0) {
937 double i2;
938 double ret;
939
940 ret = my_modf(x0-l*f, &i2);
941 (*iptr) = l*f + i2;
942 return ret;
943 }
944
945 (*iptr) = l;
946 return x - (*iptr);
947}
948
949
950static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
951 LDOUBLE fvalue, int min, int max, int flags)
952{
953 int signvalue = 0;
954 double ufvalue;
955 char iconvert[311];
956 char fconvert[311];
957 int iplace = 0;
958 int fplace = 0;
959 int padlen = 0; /* amount to pad */
960 int zpadlen = 0;
961 int caps = 0;
962 int idx;
963 double intpart;
964 double fracpart;
965 double temp;
966
967 /*
968 * AIX manpage says the default is 0, but Solaris says the default
969 * is 6, and sprintf on AIX defaults to 6
970 */
971 if (max < 0)
972 max = 6;
973
974 ufvalue = abs_val (fvalue);
975
976 if (fvalue < 0) {
977 signvalue = '-';
978 } else {
979 if (flags & DP_F_PLUS) { /* Do a sign (+/i) */
980 signvalue = '+';
981 } else {
982 if (flags & DP_F_SPACE)
983 signvalue = ' ';
984 }
985 }
986
987#if 0
988 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
989#endif
990
991#if 0
992 if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */
993#endif
994
995 /*
996 * Sorry, we only support 9 digits past the decimal because of our
997 * conversion method
998 */
999 if (max > 9)
1000 max = 9;
1001
1002 /* We "cheat" by converting the fractional part to integer by
1003 * multiplying by a factor of 10
1004 */
1005
1006 temp = ufvalue;
1007 my_modf(temp, &intpart);
1008
1009 fracpart = ROUND((POW10(max)) * (ufvalue - intpart));
1010
1011 if (fracpart >= POW10(max)) {
1012 intpart++;
1013 fracpart -= POW10(max);
1014 }
1015
1016
1017 /* Convert integer part */
1018 do {
1019 temp = intpart*0.1;
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;
1029
1030 /* Convert fractional part */
1031 if (fracpart)
1032 {
1033 do {
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--;
1043 }
1044 fconvert[fplace] = 0;
1045
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;
1050 if (padlen < 0)
1051 padlen = 0;
1052 if (flags & DP_F_MINUS)
1053 padlen = -padlen; /* Left Justifty */
1054
1055 if ((flags & DP_F_ZERO) && (padlen > 0)) {
1056 if (signvalue) {
1057 dopr_outch (buffer, currlen, maxlen, signvalue);
1058 --padlen;
1059 signvalue = 0;
1060 }
1061 while (padlen > 0) {
1062 dopr_outch (buffer, currlen, maxlen, '0');
1063 --padlen;
1064 }
1065 }
1066 while (padlen > 0) {
1067 dopr_outch (buffer, currlen, maxlen, ' ');
1068 --padlen;
1069 }
1070 if (signvalue)
1071 dopr_outch (buffer, currlen, maxlen, signvalue);
1072
1073 while (iplace > 0)
1074 dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);
1075
1076#ifdef DEBUG_SNPRINTF
1077 printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen);
1078#endif
1079
1080 /*
1081 * Decimal point. This should probably use locale to find the correct
1082 * char to print out.
1083 */
1084 if (max > 0) {
1085 dopr_outch (buffer, currlen, maxlen, '.');
1086
1087 while (zpadlen > 0) {
1088 dopr_outch (buffer, currlen, maxlen, '0');
1089 --zpadlen;
1090 }
1091
1092 while (fplace > 0)
1093 dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
1094 }
1095
1096 while (padlen < 0) {
1097 dopr_outch (buffer, currlen, maxlen, ' ');
1098 ++padlen;
1099 }
1100}
1101
1102static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c)
1103{
1104 if (*currlen < maxlen) {
1105 buffer[(*currlen)] = c;
1106 }
1107 (*currlen)++;
1108}
1109
1110static struct pr_chunk *new_chunk(void) {
1111 struct pr_chunk *new_c = (struct pr_chunk *)malloc(sizeof(struct pr_chunk));
1112
1113 if (!new_c)
1114 return NULL;
1115
1116 new_c->type = 0;
1117 new_c->num = 0;
1118 new_c->min = 0;
1119 new_c->min_star = NULL;
1120 new_c->max = -1;
1121 new_c->max_star = NULL;
1122 new_c->flags = 0;
1123 new_c->cflags = 0;
1124 new_c->start = 0;
1125 new_c->len = 0;
1126 new_c->value = 0;
1127 new_c->fvalue = 0;
1128 new_c->strvalue = NULL;
1129 new_c->pnum = NULL;
1130 new_c->next = NULL;
1131
1132 return new_c;
1133}
1134
1135static 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;
1139 int max;
1140 int cnum;
1141 int i, pos;
1142
1143 if (chunk->num > max_num) {
1144 max = chunk->num;
1145
1146 if (*list == NULL) {
1147 l = (struct pr_chunk_x *)malloc(sizeof(struct pr_chunk_x) * max);
1148 pos = 0;
1149 } else {
1150 l = (struct pr_chunk_x *)realloc(*list, sizeof(struct pr_chunk_x) * max);
1151 pos = max_num;
1152 }
1153 if (l == NULL) {
1154 for (i = 0; i < max; i++) {
1155 if ((*list)[i].chunks) free((*list)[i].chunks);
1156 }
1157 return 0;
1158 }
1159 for (i = pos; i < max; i++) {
1160 l[i].chunks = NULL;
1161 l[i].num = 0;
1162 }
1163 } else {
1164 l = *list;
1165 max = max_num;
1166 }
1167
1168 i = chunk->num - 1;
1169 cnum = l[i].num + 1;
1170 if (l[i].chunks == NULL) {
1171 c = (struct pr_chunk **)malloc(sizeof(struct pr_chunk *) * cnum);
1172 } else {
1173 c = (struct pr_chunk **)realloc(l[i].chunks, sizeof(struct pr_chunk *) * cnum);
1174 }
1175 if (c == NULL) {
1176 for (i = 0; i < max; i++) {
1177 if (l[i].chunks) free(l[i].chunks);
1178 }
1179 return 0;
1180 }
1181 c[l[i].num] = chunk;
1182 l[i].chunks = c;
1183 l[i].num = cnum;
1184
1185 *list = l;
1186 return max;
1187}
1188
1189 int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
1190{
1191 return dopr(str, count, fmt, args);
1192}
1193#endif
1194
1195/* yes this really must be a ||. Don't muck with this (tridge)
1196 *
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.
1200 */
1201#if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
1202 int snprintf(char *str,size_t count,const char *fmt,...)
1203{
1204 size_t ret;
1205 va_list ap;
1206
1207 va_start(ap, fmt);
1208 ret = vsnprintf(str, count, fmt, ap);
1209 va_end(ap);
1210 return ret;
1211}
1212#endif
1213
1214#ifndef HAVE_C99_VSNPRINTF
1215 int printf(const char *fmt, ...)
1216{
1217 va_list ap;
1218 int ret;
1219 char *s;
1220
1221 s = NULL;
1222 va_start(ap, fmt);
1223 ret = vasprintf(&s, fmt, ap);
1224 va_end(ap);
1225
1226 if (s) {
1227 fwrite(s, 1, strlen(s), stdout);
1228 }
1229 free(s);
1230
1231 return ret;
1232}
1233#endif
1234
1235#ifndef HAVE_C99_VSNPRINTF
1236 int fprintf(FILE *stream, const char *fmt, ...)
1237{
1238 va_list ap;
1239 int ret;
1240 char *s;
1241
1242 s = NULL;
1243 va_start(ap, fmt);
1244 ret = vasprintf(&s, fmt, ap);
1245 va_end(ap);
1246
1247 if (s) {
1248 fwrite(s, 1, strlen(s), stream);
1249 }
1250 free(s);
1251
1252 return ret;
1253}
1254#endif
1255
1256#endif
1257
1258#ifndef HAVE_VASPRINTF
1259 int vasprintf(char **ptr, const char *format, va_list ap)
1260{
1261 int ret;
1262 va_list ap2;
1263
1264 VA_COPY(ap2, ap);
1265 ret = vsnprintf(NULL, 0, format, ap2);
1266 va_end(ap2);
1267 if (ret <= 0) return ret;
1268
1269 (*ptr) = (char *)malloc(ret+1);
1270 if (!*ptr) return -1;
1271
1272 VA_COPY(ap2, ap);
1273 ret = vsnprintf(*ptr, ret+1, format, ap2);
1274 va_end(ap2);
1275
1276 return ret;
1277}
1278#endif
1279
1280
1281#ifndef HAVE_ASPRINTF
1282 int asprintf(char **ptr, const char *format, ...)
1283{
1284 va_list ap;
1285 int ret;
1286
1287 *ptr = NULL;
1288 va_start(ap, format);
1289 ret = vasprintf(ptr, format, ap);
1290 va_end(ap);
1291
1292 return ret;
1293}
1294#endif
1295
1296#ifdef TEST_SNPRINTF
1297
1298 int sprintf(char *str,const char *fmt,...);
1299 int printf(const char *fmt,...);
1300
1301 int main (void)
1302{
1303 char buf1[1024];
1304 char buf2[1024];
1305 char *buf3;
1306 char *fp_fmt[] = {
1307 "%1.1f",
1308 "%-1.5f",
1309 "%1.5f",
1310 "%123.9f",
1311 "%10.5f",
1312 "% 10.5f",
1313 "%+22.9f",
1314 "%+4.9f",
1315 "%01.3f",
1316 "%4f",
1317 "%3.1f",
1318 "%3.2f",
1319 "%.0f",
1320 "%f",
1321 "%-8.8f",
1322 "%-9.9f",
1323 NULL
1324 };
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,
1327 /* END LIST */ 0};
1328 char *int_fmt[] = {
1329 "%-1.5d",
1330 "%1.5d",
1331 "%123.9d",
1332 "%5.5d",
1333 "%10.5d",
1334 "% 10.5d",
1335 "%+22.33d",
1336 "%01.3d",
1337 "%4d",
1338 "%d",
1339 NULL
1340 };
1341 long int_nums[] = { -1, 134, 91340, 341, 0203, 1234567890, 0};
1342 char *str_fmt[] = {
1343 "%10.5s",
1344 "%-10.5s",
1345 "%5.10s",
1346 "%-5.10s",
1347 "%10.1s",
1348 "%0.10s",
1349 "%10.0s",
1350 "%1.10s",
1351 "%s",
1352 "%.1s",
1353 "%.10s",
1354 "%10s",
1355 NULL
1356 };
1357 char *str_vals[] = {"hello", "a", "", "a longer string", NULL};
1358#ifdef HAVE_LONG_LONG
1359 char *ll_fmt[] = {
1360 "%llu",
1361 NULL
1362 };
1363 LLONG ll_nums[] = { 134, 91340, 341, 0203, 1234567890, 128006186140000000LL, 0};
1364#endif
1365 int x, y;
1366 int fail = 0;
1367 int num = 0;
1368 int l1, l2;
1369 char *ss_fmt[] = {
1370 "%zd",
1371 "%zu",
1372 NULL
1373 };
1374 size_t ss_nums[] = {134, 91340, 123456789, 0203, 1234567890, 0};
1375
1376 printf ("Testing snprintf format codes against system sprintf...\n");
1377
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);
1387 fail++;
1388 }
1389 num++;
1390 }
1391 }
1392
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);
1402 fail++;
1403 }
1404 num++;
1405 }
1406 }
1407
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);
1417 fail++;
1418 }
1419 num++;
1420 }
1421 }
1422
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);
1433 fail++;
1434 }
1435 num++;
1436 }
1437 }
1438#endif
1439
1440#define BUFSZ 2048
1441
1442 buf1[0] = buf2[0] = '\0';
1443 if ((buf3 = malloc(BUFSZ)) == NULL) {
1444 fail++;
1445 } else {
1446 num++;
1447 memset(buf3, 'a', BUFSZ);
1448 snprintf(buf1, sizeof(buf1), "%.*s", 1, buf3);
1449 buf1[1023] = '\0';
1450 if (strcmp(buf1, "a") != 0) {
1451 printf("length limit buf1 '%s' expected 'a'\n", buf1);
1452 fail++;
1453 }
1454 }
1455
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);
1463 fail++;
1464 }
1465
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);
1473 fail++;
1474 }
1475
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);
1485 fail++;
1486 }
1487 num++;
1488 }
1489 }
1490#if 0
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);
1498 fail++;
1499 }
1500
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);
1508 fail++;
1509 }
1510#endif
1511 printf ("%d tests failed out of %d.\n", fail, num);
1512
1513 printf("seeing how many digits we support\n");
1514 {
1515 double v0 = 0.12345678901234567890123456789012345678901;
1516 for (x=0; x<100; x++) {
1517 double p = pow(10, x);
1518 double r = v0*p;
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);
1523 break;
1524 }
1525 }
1526 }
1527
1528 return 0;
1529}
1530#endif /* TEST_SNPRINTF */
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