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