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