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Fix copyright.
[rsync/rsync.git] / lib / snprintf.c
CommitLineData
2f098547
AT		 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
f8be5ef4
AT		 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 *
9e3c856a 48 * Andrew Tridgell (tridge@samba.org) Oct 1998
10600500
AT		 49 * fixed handling of %.0f
50 * added test for HAVE_LONG_DOUBLE
51 *
8950ac03
AT		 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 *
f8be5ef4
AT		 56 **************************************************************/
57
8950ac03 58#ifndef NO_CONFIG_H /* for some tests */
f8be5ef4 59#include "config.h"
8950ac03 60#endif
f8be5ef4 61
8950ac03 62#ifdef HAVE_STRING_H
f8be5ef4 63#include <string.h>
8950ac03 64#endif
f8be5ef4 65
8950ac03
AT		 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
f8be5ef4 77
8950ac03
AT		 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) {}
f8be5ef4 83#else
f8be5ef4 84
10600500
AT		 85#ifdef HAVE_LONG_DOUBLE
86#define LDOUBLE long double
87#else
88#define LDOUBLE double
89#endif
90
8950ac03
AT		 91#ifdef HAVE_LONG_LONG
92#define LLONG long long
93#else
94#define LLONG long
95#endif
f8be5ef4 96
8950ac03
AT		 97static size_t dopr(char *buffer, size_t maxlen, const char *format,
98 va_list args);
99static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
f8be5ef4 100 char *value, int flags, int min, int max);
8950ac03 101static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
f8be5ef4 102 long value, int base, int min, int max, int flags);
8950ac03 103static void fmtfp(char *buffer, size_t *currlen, size_t maxlen,
10600500 104 LDOUBLE fvalue, int min, int max, int flags);
8950ac03 105static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c);
f8be5ef4
AT		 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
8950ac03 134#define DP_C_LLONG 4
f8be5ef4 135
8950ac03
AT		 136#define char_to_int(p) ((p)- '0')
137#ifndef MAX
138#define MAX(p,q) (((p) >= (q)) ? (p) : (q))
139#endif
f8be5ef4 140
8950ac03 141static size_t dopr(char *buffer, size_t maxlen, const char *format, va_list args)
f8be5ef4 142{
8950ac03
AT		 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;
f8be5ef4 157 ch = *format++;
8950ac03
AT		 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 (max == -1) {
337 max = strlen(strvalue);
338 }
339 if (min > 0 && max >= 0 && min > max) max = min;
340 fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max);
341 break;
342 case 'p':
343 strvalue = va_arg (args, void *);
344 fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags);
345 break;
346 case 'n':
347 if (cflags == DP_C_SHORT) {
348 short int *num;
349 num = va_arg (args, short int *);
350 *num = currlen;
351 } else if (cflags == DP_C_LONG) {
352 long int *num;
353 num = va_arg (args, long int *);
354 *num = (long int)currlen;
355 } else if (cflags == DP_C_LLONG) {
356 LLONG *num;
357 num = va_arg (args, LLONG *);
358 *num = (LLONG)currlen;
359 } else {
360 int *num;
361 num = va_arg (args, int *);
362 *num = currlen;
363 }
364 break;
365 case '%':
366 dopr_outch (buffer, &currlen, maxlen, ch);
367 break;
368 case 'w':
369 /* not supported yet, treat as next char */
370 ch = *format++;
371 break;
372 default:
373 /* Unknown, skip */
374 break;
375 }
376 ch = *format++;
377 state = DP_S_DEFAULT;
378 flags = cflags = min = 0;
379 max = -1;
380 break;
381 case DP_S_DONE:
382 break;
383 default:
384 /* hmm? */
385 break; /* some picky compilers need this */
386 }
387 }
388 if (maxlen != 0) {
389 if (currlen < maxlen - 1)
390 buffer[currlen] = '\0';
391 else if (maxlen > 0)
392 buffer[maxlen - 1] = '\0';
393 }
394
395 return currlen;
f8be5ef4
AT		 396}
397
8950ac03 398static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
f8be5ef4
AT		 399 char *value, int flags, int min, int max)
400{
8950ac03
AT		 401 int padlen, strln; /* amount to pad */
402 int cnt = 0;
403
404#ifdef DEBUG_SNPRINTF
405 printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value);
406#endif
407 if (value == 0) {
408 value = "<NULL>";
409 }
410
411 for (strln = 0; value[strln]; ++strln); /* strlen */
412 padlen = min - strln;
413 if (padlen < 0)
414 padlen = 0;
415 if (flags & DP_F_MINUS)
416 padlen = -padlen; /* Left Justify */
417
418 while ((padlen > 0) && (cnt < max)) {
419 dopr_outch (buffer, currlen, maxlen, ' ');
420 --padlen;
421 ++cnt;
422 }
423 while (*value && (cnt < max)) {
424 dopr_outch (buffer, currlen, maxlen, *value++);
425 ++cnt;
426 }
427 while ((padlen < 0) && (cnt < max)) {
428 dopr_outch (buffer, currlen, maxlen, ' ');
429 ++padlen;
430 ++cnt;
431 }
f8be5ef4
AT		 432}
433
434/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
435
8950ac03 436static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
f8be5ef4
AT		 437 long value, int base, int min, int max, int flags)
438{
8950ac03
AT		 439 int signvalue = 0;
440 unsigned long uvalue;
441 char convert[20];
442 int place = 0;
443 int spadlen = 0; /* amount to space pad */
444 int zpadlen = 0; /* amount to zero pad */
445 int caps = 0;
446
447 if (max < 0)
448 max = 0;
449
450 uvalue = value;
451
452 if(!(flags & DP_F_UNSIGNED)) {
453 if( value < 0 ) {
454 signvalue = '-';
455 uvalue = -value;
456 } else {
457 if (flags & DP_F_PLUS) /* Do a sign (+/i) */
458 signvalue = '+';
459 else if (flags & DP_F_SPACE)
460 signvalue = ' ';
461 }
462 }
f8be5ef4 463
8950ac03
AT		 464 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
465
466 do {
467 convert[place++] =
468 (caps? "0123456789ABCDEF":"0123456789abcdef")
469 [uvalue % (unsigned)base ];
470 uvalue = (uvalue / (unsigned)base );
471 } while(uvalue && (place < 20));
472 if (place == 20) place--;
473 convert[place] = 0;
474
475 zpadlen = max - place;
476 spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
477 if (zpadlen < 0) zpadlen = 0;
478 if (spadlen < 0) spadlen = 0;
479 if (flags & DP_F_ZERO) {
480 zpadlen = MAX(zpadlen, spadlen);
481 spadlen = 0;
482 }
483 if (flags & DP_F_MINUS)
484 spadlen = -spadlen; /* Left Justifty */
f8be5ef4
AT		 485
486#ifdef DEBUG_SNPRINTF
8950ac03
AT		 487 printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
488 zpadlen, spadlen, min, max, place);
f8be5ef4
AT		 489#endif
490
8950ac03
AT		 491 /* Spaces */
492 while (spadlen > 0) {
493 dopr_outch (buffer, currlen, maxlen, ' ');
494 --spadlen;
495 }
496
497 /* Sign */
498 if (signvalue)
499 dopr_outch (buffer, currlen, maxlen, signvalue);
500
501 /* Zeros */
502 if (zpadlen > 0) {
503 while (zpadlen > 0) {
504 dopr_outch (buffer, currlen, maxlen, '0');
505 --zpadlen;
506 }
507 }
508
509 /* Digits */
510 while (place > 0)
511 dopr_outch (buffer, currlen, maxlen, convert[--place]);
f8be5ef4 512
8950ac03
AT		 513 /* Left Justified spaces */
514 while (spadlen < 0) {
515 dopr_outch (buffer, currlen, maxlen, ' ');
516 ++spadlen;
517 }
f8be5ef4
AT		 518}
519
8950ac03 520static LDOUBLE abs_val(LDOUBLE value)
f8be5ef4 521{
8950ac03 522 LDOUBLE result = value;
f8be5ef4 523
8950ac03
AT		 524 if (value < 0)
525 result = -value;
526
527 return result;
f8be5ef4
AT		 528}
529
8950ac03 530static LDOUBLE POW10(int exp)
f8be5ef4 531{
8950ac03
AT		 532 LDOUBLE result = 1;
533
534 while (exp) {
535 result *= 10;
536 exp--;
537 }
f8be5ef4 538
8950ac03 539 return result;
f8be5ef4
AT		 540}
541
8950ac03 542static LLONG ROUND(LDOUBLE value)
f8be5ef4 543{
8950ac03 544 LLONG intpart;
f8be5ef4 545
8950ac03
AT		 546 intpart = (LLONG)value;
547 value = value - intpart;
548 if (value >= 0.5) intpart++;
549
550 return intpart;
551}
f8be5ef4 552
8950ac03
AT		 553/* a replacement for modf that doesn't need the math library. Should
554 be portable, but slow */
555static double my_modf(double x0, double *iptr)
556{
557 int i;
558 long l;
559 double x = x0;
560 double f = 1.0;
561
562 for (i=0;i<100;i++) {
563 l = (long)x;
564 if (l <= (x+1) && l >= (x-1)) break;
565 x *= 0.1;
566 f *= 10.0;
567 }
568
569 if (i == 100) {
570 /* yikes! the number is beyond what we can handle. What do we do? */
571 (*iptr) = 0;
572 return 0;
573 }
574
575 if (i != 0) {
576 double i2;
577 double ret;
578
579 ret = my_modf(x0-l*f, &i2);
580 (*iptr) = l*f + i2;
581 return ret;
582 }
583
584 (*iptr) = l;
585 return x - (*iptr);
f8be5ef4
AT		 586}
587
8950ac03 588
f8be5ef4 589static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
10600500 590 LDOUBLE fvalue, int min, int max, int flags)
f8be5ef4 591{
8950ac03
AT		 592 int signvalue = 0;
593 double ufvalue;
594 char iconvert[311];
595 char fconvert[311];
596 int iplace = 0;
597 int fplace = 0;
598 int padlen = 0; /* amount to pad */
599 int zpadlen = 0;
600 int caps = 0;
601 int index;
602 double intpart;
603 double fracpart;
604 double temp;
f8be5ef4 605
8950ac03
AT		 606 /*
607 * AIX manpage says the default is 0, but Solaris says the default
608 * is 6, and sprintf on AIX defaults to 6
609 */
610 if (max < 0)
611 max = 6;
f8be5ef4 612
8950ac03 613 ufvalue = abs_val (fvalue);
f8be5ef4 614
8950ac03
AT		 615 if (fvalue < 0) {
616 signvalue = '-';
617 } else {
618 if (flags & DP_F_PLUS) { /* Do a sign (+/i) */
619 signvalue = '+';
620 } else {
621 if (flags & DP_F_SPACE)
622 signvalue = ' ';
623 }
624 }
f8be5ef4 625
8950ac03
AT		 626#if 0
627 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
f8be5ef4
AT		 628#endif
629
8950ac03
AT		 630#if 0
631 if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */
632#endif
f8be5ef4 633
8950ac03
AT		 634 /*
635 * Sorry, we only support 16 digits past the decimal because of our
636 * conversion method
637 */
638 if (max > 16)
639 max = 16;
640
641 /* We "cheat" by converting the fractional part to integer by
642 * multiplying by a factor of 10
643 */
644
645 temp = ufvalue;
646 my_modf(temp, &intpart);
647
648 fracpart = ROUND((POW10(max)) * (ufvalue - intpart));
649
650 if (fracpart >= POW10(max)) {
651 intpart++;
652 fracpart -= POW10(max);
653 }
654
655
656 /* Convert integer part */
657 do {
658 temp = intpart;
659 my_modf(intpart*0.1, &intpart);
660 temp = temp*0.1;
661 index = (int) ((temp -intpart +0.05)* 10.0);
662 /* index = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */
663 /* printf ("%llf, %f, %x\n", temp, intpart, index); */
664 iconvert[iplace++] =
665 (caps? "0123456789ABCDEF":"0123456789abcdef")[index];
666 } while (intpart && (iplace < 311));
667 if (iplace == 311) iplace--;
668 iconvert[iplace] = 0;
669
670 /* Convert fractional part */
671 if (fracpart)
672 {
673 do {
674 temp = fracpart;
675 my_modf(fracpart*0.1, &fracpart);
676 temp = temp*0.1;
677 index = (int) ((temp -fracpart +0.05)* 10.0);
678 /* index = (int) ((((temp/10) -fracpart) +0.05) *10); */
679 /* printf ("%lf, %lf, %ld\n", temp, fracpart, index); */
680 fconvert[fplace++] =
681 (caps? "0123456789ABCDEF":"0123456789abcdef")[index];
682 } while(fracpart && (fplace < 311));
683 if (fplace == 311) fplace--;
684 }
685 fconvert[fplace] = 0;
686
687 /* -1 for decimal point, another -1 if we are printing a sign */
688 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
689 zpadlen = max - fplace;
690 if (zpadlen < 0) zpadlen = 0;
691 if (padlen < 0)
692 padlen = 0;
693 if (flags & DP_F_MINUS)
694 padlen = -padlen; /* Left Justifty */
695
696 if ((flags & DP_F_ZERO) && (padlen > 0)) {
697 if (signvalue) {
698 dopr_outch (buffer, currlen, maxlen, signvalue);
699 --padlen;
700 signvalue = 0;
701 }
702 while (padlen > 0) {
703 dopr_outch (buffer, currlen, maxlen, '0');
704 --padlen;
705 }
706 }
707 while (padlen > 0) {
708 dopr_outch (buffer, currlen, maxlen, ' ');
709 --padlen;
710 }
711 if (signvalue)
712 dopr_outch (buffer, currlen, maxlen, signvalue);
713
714 while (iplace > 0)
715 dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);
10600500
AT		 716
717#ifdef DEBUG_SNPRINTF
8950ac03 718 printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen);
10600500
AT		 719#endif
720
8950ac03
AT		 721 /*
722 * Decimal point. This should probably use locale to find the correct
723 * char to print out.
724 */
725 if (max > 0) {
726 dopr_outch (buffer, currlen, maxlen, '.');
727
728 while (fplace > 0)
729 dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
730 }
731
732 while (zpadlen > 0) {
733 dopr_outch (buffer, currlen, maxlen, '0');
734 --zpadlen;
735 }
736
737 while (padlen < 0) {
738 dopr_outch (buffer, currlen, maxlen, ' ');
739 ++padlen;
740 }
f8be5ef4
AT		 741}
742
8950ac03 743static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c)
f8be5ef4 744{
8950ac03
AT		 745 if (*currlen < maxlen) {
746 buffer[(*currlen)] = c;
747 }
748 (*currlen)++;
f8be5ef4 749}
f8be5ef4 750
8950ac03 751#if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
2f098547 752 int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
f8be5ef4 753{
8950ac03 754 return dopr(str, count, fmt, args);
f8be5ef4 755}
f8be5ef4 756#endif
8950ac03
AT		 757
758#if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
759 int snprintf(char *str,size_t count,const char *fmt,...)
f8be5ef4 760{
8950ac03
AT		 761 size_t ret;
762 va_list ap;
f8be5ef4 763
8950ac03
AT		 764 va_start(ap, fmt);
765 ret = vsnprintf(str, count, fmt, ap);
766 va_end(ap);
767 return ret;
f8be5ef4 768}
8950ac03 769#endif
f8be5ef4 770
8950ac03 771#endif
10600500 772
8950ac03
AT		 773#ifndef HAVE_VASPRINTF
774 int vasprintf(char **ptr, const char *format, va_list ap)
775{
776 int ret;
777
778 ret = vsnprintf(NULL, 0, format, ap);
779 if (ret <= 0) return ret;
10600500 780
8950ac03
AT		 781 (*ptr) = (char *)malloc(ret+1);
782 if (!*ptr) return -1;
783 ret = vsnprintf(*ptr, ret+1, format, ap);
784
785 return ret;
786}
787#endif
788
789
790#ifndef HAVE_ASPRINTF
791 int asprintf(char **ptr, const char *format, ...)
792{
793 va_list ap;
794 int ret;
795
796 va_start(ap, format);
797 ret = vasprintf(ptr, format, ap);
798 va_end(ap);
799
800 return ret;
801}
f8be5ef4 802#endif
8950ac03
AT		 803
804#ifdef TEST_SNPRINTF
805
806 int sprintf(char *str,const char *fmt,...);
807
2f098547 808 int main (void)
f8be5ef4 809{
8950ac03
AT		 810 char buf1[1024];
811 char buf2[1024];
812 char *fp_fmt[] = {
813 "%1.1f",
814 "%-1.5f",
815 "%1.5f",
816 "%123.9f",
817 "%10.5f",
818 "% 10.5f",
819 "%+22.9f",
820 "%+4.9f",
821 "%01.3f",
822 "%4f",
823 "%3.1f",
824 "%3.2f",
825 "%.0f",
826 "%f",
827 "-16.16f",
828 NULL
829 };
830 double fp_nums[] = { 6442452944.1234, -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996,
831 0.9996, 1.996, 4.136, 0};
832 char *int_fmt[] = {
833 "%-1.5d",
834 "%1.5d",
835 "%123.9d",
836 "%5.5d",
837 "%10.5d",
838 "% 10.5d",
839 "%+22.33d",
840 "%01.3d",
841 "%4d",
842 "%d",
843 NULL
844 };
845 long int_nums[] = { -1, 134, 91340, 341, 0203, 0};
846 char *str_fmt[] = {
847 "10.5s",
848 "5.10s",
849 "10.1s",
850 "0.10s",
851 "10.0s",
852 "1.10s",
853 "%s",
854 "%.1s",
855 "%.10s",
856 "%10s",
857 NULL
858 };
859 char *str_vals[] = {"hello", "a", "", "a longer string", NULL};
860 int x, y;
861 int fail = 0;
862 int num = 0;
863
864 printf ("Testing snprintf format codes against system sprintf...\n");
865
866 for (x = 0; fp_fmt[x] ; x++) {
867 for (y = 0; fp_nums[y] != 0 ; y++) {
868 int l1 = snprintf(NULL, 0, fp_fmt[x], fp_nums[y]);
869 int l2 = snprintf(buf1, sizeof(buf1), fp_fmt[x], fp_nums[y]);
870 sprintf (buf2, fp_fmt[x], fp_nums[y]);
871 if (strcmp (buf1, buf2)) {
872 printf("snprintf doesn't match Format: %s\n\tsnprintf = [%s]\n\t sprintf = [%s]\n",
873 fp_fmt[x], buf1, buf2);
874 fail++;
875 }
876 if (l1 != l2) {
877 printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, fp_fmt[x]);
878 fail++;
879 }
880 num++;
881 }
882 }
883
884 for (x = 0; int_fmt[x] ; x++) {
885 for (y = 0; int_nums[y] != 0 ; y++) {
886 int l1 = snprintf(NULL, 0, int_fmt[x], int_nums[y]);
887 int l2 = snprintf(buf1, sizeof(buf1), int_fmt[x], int_nums[y]);
888 sprintf (buf2, int_fmt[x], int_nums[y]);
889 if (strcmp (buf1, buf2)) {
890 printf("snprintf doesn't match Format: %s\n\tsnprintf = [%s]\n\t sprintf = [%s]\n",
891 int_fmt[x], buf1, buf2);
892 fail++;
893 }
894 if (l1 != l2) {
895 printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, int_fmt[x]);
896 fail++;
897 }
898 num++;
899 }
900 }
901
902 for (x = 0; str_fmt[x] ; x++) {
903 for (y = 0; str_vals[y] != 0 ; y++) {
904 int l1 = snprintf(NULL, 0, str_fmt[x], str_vals[y]);
905 int l2 = snprintf(buf1, sizeof(buf1), str_fmt[x], str_vals[y]);
906 sprintf (buf2, str_fmt[x], str_vals[y]);
907 if (strcmp (buf1, buf2)) {
908 printf("snprintf doesn't match Format: %s\n\tsnprintf = [%s]\n\t sprintf = [%s]\n",
909 str_fmt[x], buf1, buf2);
910 fail++;
911 }
912 if (l1 != l2) {
913 printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, str_fmt[x]);
914 fail++;
915 }
916 num++;
917 }
918 }
919
920 printf ("%d tests failed out of %d.\n", fail, num);
921
922 printf("seeing how many digits we support\n");
923 {
924 double v0 = 0.12345678901234567890123456789012345678901;
925 for (x=0; x<100; x++) {
926 snprintf(buf1, sizeof(buf1), "%1.1f", v0*pow(10, x));
927 sprintf(buf2, "%1.1f", v0*pow(10, x));
928 if (strcmp(buf1, buf2)) {
929 printf("we seem to support %d digits\n", x-1);
930 break;
931 }
932 }
933 }
934
935 return 0;
f8be5ef4
AT		 936}
937#endif /* SNPRINTF_TEST */
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