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Fix macros for next and opaque quota ops. Spotted by metze
[Samba/vl.git] / source3 / lib / snprintf.c
blob9b9ceb60cacf62702eebd52454406ca43bb838dc
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
94 #ifndef NO_CONFIG_H
95 #include "config.h"
96 #else
97 #define NULL 0
98 #endif
99
100 #ifdef TEST_SNPRINTF /* need math library headers for testing */
101
102 /* In test mode, we pretend that this system doesn't have any snprintf
103 * functions, regardless of what config.h says. */
104 # undef HAVE_SNPRINTF
105 # undef HAVE_VSNPRINTF
106 # undef HAVE_C99_VSNPRINTF
107 # undef HAVE_ASPRINTF
108 # undef HAVE_VASPRINTF
109 # include <math.h>
110 #endif /* TEST_SNPRINTF */
111
112 #ifdef HAVE_STRING_H
113 #include <string.h>
114 #endif
115
116 #ifdef HAVE_STRINGS_H
117 #include <strings.h>
118 #endif
119 #ifdef HAVE_CTYPE_H
120 #include <ctype.h>
121 #endif
122 #include <sys/types.h>
123 #include <stdarg.h>
124 #ifdef HAVE_STDLIB_H
125 #include <stdlib.h>
126 #endif
127
128 #if defined(HAVE_SNPRINTF) && defined(HAVE_VSNPRINTF) && defined(HAVE_C99_VSNPRINTF)
129 /* only include stdio.h if we are not re-defining snprintf or vsnprintf */
130 #include <stdio.h>
131 /* make the compiler happy with an empty file */
132 void dummy_snprintf(void);
133 void dummy_snprintf(void) {}
134 #endif /* HAVE_SNPRINTF, etc */
135
136 #ifdef HAVE_LONG_DOUBLE
137 #define LDOUBLE long double
138 #else
139 #define LDOUBLE double
140 #endif
141
142 #ifdef HAVE_LONG_LONG
143 #define LLONG long long
144 #else
145 #define LLONG long
146 #endif
147
148 #ifndef VA_COPY
149 #ifdef HAVE_VA_COPY
150 #define VA_COPY(dest, src) __va_copy(dest, src)
151 #else
152 #define VA_COPY(dest, src) (dest) = (src)
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_SHORT 1
180 #define DP_C_LONG 2
181 #define DP_C_LDOUBLE 3
182 #define DP_C_LLONG 4
183
184 #define char_to_int(p) ((p)- '0')
185 #ifndef MAX
186 #define MAX(p,q) (((p) >= (q)) ? (p) : (q))
187 #endif
188
189 /* yes this really must be a ||. Don't muck with this (tridge) */
190 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
191
192 static size_t dopr(char *buffer, size_t maxlen, const char *format,
193 va_list args_in);
194 static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
195 char *value, int flags, int min, int max);
196 static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
197 long value, int base, int min, int max, int flags);
198 static void fmtfp(char *buffer, size_t *currlen, size_t maxlen,
199 LDOUBLE fvalue, int min, int max, int flags);
200 static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c);
201
202 static size_t dopr(char *buffer, size_t maxlen, const char *format, va_list args_in)
203 {
204 char ch;
205 LLONG value;
206 LDOUBLE fvalue;
207 char *strvalue;
208 int min;
209 int max;
210 int state;
211 int flags;
212 int cflags;
213 size_t currlen;
214 va_list args;
215
216 VA_COPY(args, args_in);
217
218 state = DP_S_DEFAULT;
219 currlen = flags = cflags = min = 0;
220 max = -1;
221 ch = *format++;
222
223 while (state != DP_S_DONE) {
224 if (ch == '\0')
225 state = DP_S_DONE;
226
227 switch(state) {
228 case DP_S_DEFAULT:
229 if (ch == '%')
230 state = DP_S_FLAGS;
231 else
232 dopr_outch (buffer, &currlen, maxlen, ch);
233 ch = *format++;
234 break;
235 case DP_S_FLAGS:
236 switch (ch) {
237 case '-':
238 flags |= DP_F_MINUS;
239 ch = *format++;
240 break;
241 case '+':
242 flags |= DP_F_PLUS;
243 ch = *format++;
244 break;
245 case ' ':
246 flags |= DP_F_SPACE;
247 ch = *format++;
248 break;
249 case '#':
250 flags |= DP_F_NUM;
251 ch = *format++;
252 break;
253 case '0':
254 flags |= DP_F_ZERO;
255 ch = *format++;
256 break;
257 default:
258 state = DP_S_MIN;
259 break;
260 }
261 break;
262 case DP_S_MIN:
263 if (isdigit((unsigned char)ch)) {
264 min = 10*min + char_to_int (ch);
265 ch = *format++;
266 } else if (ch == '*') {
267 min = va_arg (args, int);
268 ch = *format++;
269 state = DP_S_DOT;
270 } else {
271 state = DP_S_DOT;
272 }
273 break;
274 case DP_S_DOT:
275 if (ch == '.') {
276 state = DP_S_MAX;
277 ch = *format++;
278 } else {
279 state = DP_S_MOD;
280 }
281 break;
282 case DP_S_MAX:
283 if (isdigit((unsigned char)ch)) {
284 if (max < 0)
285 max = 0;
286 max = 10*max + char_to_int (ch);
287 ch = *format++;
288 } else if (ch == '*') {
289 max = va_arg (args, int);
290 ch = *format++;
291 state = DP_S_MOD;
292 } else {
293 state = DP_S_MOD;
294 }
295 break;
296 case DP_S_MOD:
297 switch (ch) {
298 case 'h':
299 cflags = DP_C_SHORT;
300 ch = *format++;
301 break;
302 case 'l':
303 cflags = DP_C_LONG;
304 ch = *format++;
305 if (ch == 'l') { /* It's a long long */
306 cflags = DP_C_LLONG;
307 ch = *format++;
308 }
309 break;
310 case 'L':
311 cflags = DP_C_LDOUBLE;
312 ch = *format++;
313 break;
314 default:
315 break;
316 }
317 state = DP_S_CONV;
318 break;
319 case DP_S_CONV:
320 switch (ch) {
321 case 'd':
322 case 'i':
323 if (cflags == DP_C_SHORT)
324 value = va_arg (args, int);
325 else if (cflags == DP_C_LONG)
326 value = va_arg (args, long int);
327 else if (cflags == DP_C_LLONG)
328 value = va_arg (args, LLONG);
329 else
330 value = va_arg (args, int);
331 fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
332 break;
333 case 'o':
334 flags |= DP_F_UNSIGNED;
335 if (cflags == DP_C_SHORT)
336 value = va_arg (args, unsigned int);
337 else if (cflags == DP_C_LONG)
338 value = (long)va_arg (args, unsigned long int);
339 else if (cflags == DP_C_LLONG)
340 value = (long)va_arg (args, unsigned LLONG);
341 else
342 value = (long)va_arg (args, unsigned int);
343 fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags);
344 break;
345 case 'u':
346 flags |= DP_F_UNSIGNED;
347 if (cflags == DP_C_SHORT)
348 value = va_arg (args, unsigned int);
349 else if (cflags == DP_C_LONG)
350 value = (long)va_arg (args, unsigned long int);
351 else if (cflags == DP_C_LLONG)
352 value = (LLONG)va_arg (args, unsigned LLONG);
353 else
354 value = (long)va_arg (args, unsigned int);
355 fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
356 break;
357 case 'X':
358 flags |= DP_F_UP;
359 case 'x':
360 flags |= DP_F_UNSIGNED;
361 if (cflags == DP_C_SHORT)
362 value = va_arg (args, unsigned int);
363 else if (cflags == DP_C_LONG)
364 value = (long)va_arg (args, unsigned long int);
365 else if (cflags == DP_C_LLONG)
366 value = (LLONG)va_arg (args, unsigned LLONG);
367 else
368 value = (long)va_arg (args, unsigned int);
369 fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags);
370 break;
371 case 'f':
372 if (cflags == DP_C_LDOUBLE)
373 fvalue = va_arg (args, LDOUBLE);
374 else
375 fvalue = va_arg (args, double);
376 /* um, floating point? */
377 fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
378 break;
379 case 'E':
380 flags |= DP_F_UP;
381 case 'e':
382 if (cflags == DP_C_LDOUBLE)
383 fvalue = va_arg (args, LDOUBLE);
384 else
385 fvalue = va_arg (args, double);
386 fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
387 break;
388 case 'G':
389 flags |= DP_F_UP;
390 case 'g':
391 if (cflags == DP_C_LDOUBLE)
392 fvalue = va_arg (args, LDOUBLE);
393 else
394 fvalue = va_arg (args, double);
395 fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
396 break;
397 case 'c':
398 dopr_outch (buffer, &currlen, maxlen, va_arg (args, int));
399 break;
400 case 's':
401 strvalue = va_arg (args, char *);
402 if (!strvalue) strvalue = "(NULL)";
403 if (max == -1) {
404 max = strlen(strvalue);
405 }
406 if (min > 0 && max >= 0 && min > max) max = min;
407 fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max);
408 break;
409 case 'p':
410 strvalue = va_arg (args, void *);
411 fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags);
412 break;
413 case 'n':
414 if (cflags == DP_C_SHORT) {
415 short int *num;
416 num = va_arg (args, short int *);
417 *num = currlen;
418 } else if (cflags == DP_C_LONG) {
419 long int *num;
420 num = va_arg (args, long int *);
421 *num = (long int)currlen;
422 } else if (cflags == DP_C_LLONG) {
423 LLONG *num;
424 num = va_arg (args, LLONG *);
425 *num = (LLONG)currlen;
426 } else {
427 int *num;
428 num = va_arg (args, int *);
429 *num = currlen;
430 }
431 break;
432 case '%':
433 dopr_outch (buffer, &currlen, maxlen, ch);
434 break;
435 case 'w':
436 /* not supported yet, treat as next char */
437 ch = *format++;
438 break;
439 default:
440 /* Unknown, skip */
441 break;
442 }
443 ch = *format++;
444 state = DP_S_DEFAULT;
445 flags = cflags = min = 0;
446 max = -1;
447 break;
448 case DP_S_DONE:
449 break;
450 default:
451 /* hmm? */
452 break; /* some picky compilers need this */
453 }
454 }
455 if (maxlen != 0) {
456 if (currlen < maxlen - 1)
457 buffer[currlen] = '\0';
458 else if (maxlen > 0)
459 buffer[maxlen - 1] = '\0';
460 }
461
462 return currlen;
463 }
464
465 static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
466 char *value, int flags, int min, int max)
467 {
468 int padlen, strln; /* amount to pad */
469 int cnt = 0;
470
471 #ifdef DEBUG_SNPRINTF
472 printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value);
473 #endif
474 if (value == 0) {
475 value = "<NULL>";
476 }
477
478 for (strln = 0; value[strln]; ++strln); /* strlen */
479 padlen = min - strln;
480 if (padlen < 0)
481 padlen = 0;
482 if (flags & DP_F_MINUS)
483 padlen = -padlen; /* Left Justify */
484
485 while ((padlen > 0) && (cnt < max)) {
486 dopr_outch (buffer, currlen, maxlen, ' ');
487 --padlen;
488 ++cnt;
489 }
490 while (*value && (cnt < max)) {
491 dopr_outch (buffer, currlen, maxlen, *value++);
492 ++cnt;
493 }
494 while ((padlen < 0) && (cnt < max)) {
495 dopr_outch (buffer, currlen, maxlen, ' ');
496 ++padlen;
497 ++cnt;
498 }
499 }
500
501 /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
502
503 static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
504 long value, int base, int min, int max, int flags)
505 {
506 int signvalue = 0;
507 unsigned long uvalue;
508 char convert[20];
509 int place = 0;
510 int spadlen = 0; /* amount to space pad */
511 int zpadlen = 0; /* amount to zero pad */
512 int caps = 0;
513
514 if (max < 0)
515 max = 0;
516
517 uvalue = value;
518
519 if(!(flags & DP_F_UNSIGNED)) {
520 if( value < 0 ) {
521 signvalue = '-';
522 uvalue = -value;
523 } else {
524 if (flags & DP_F_PLUS) /* Do a sign (+/i) */
525 signvalue = '+';
526 else if (flags & DP_F_SPACE)
527 signvalue = ' ';
528 }
529 }
530
531 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
532
533 do {
534 convert[place++] =
535 (caps? "0123456789ABCDEF":"0123456789abcdef")
536 [uvalue % (unsigned)base ];
537 uvalue = (uvalue / (unsigned)base );
538 } while(uvalue && (place < 20));
539 if (place == 20) place--;
540 convert[place] = 0;
541
542 zpadlen = max - place;
543 spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
544 if (zpadlen < 0) zpadlen = 0;
545 if (spadlen < 0) spadlen = 0;
546 if (flags & DP_F_ZERO) {
547 zpadlen = MAX(zpadlen, spadlen);
548 spadlen = 0;
549 }
550 if (flags & DP_F_MINUS)
551 spadlen = -spadlen; /* Left Justifty */
552
553 #ifdef DEBUG_SNPRINTF
554 printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
555 zpadlen, spadlen, min, max, place);
556 #endif
557
558 /* Spaces */
559 while (spadlen > 0) {
560 dopr_outch (buffer, currlen, maxlen, ' ');
561 --spadlen;
562 }
563
564 /* Sign */
565 if (signvalue)
566 dopr_outch (buffer, currlen, maxlen, signvalue);
567
568 /* Zeros */
569 if (zpadlen > 0) {
570 while (zpadlen > 0) {
571 dopr_outch (buffer, currlen, maxlen, '0');
572 --zpadlen;
573 }
574 }
575
576 /* Digits */
577 while (place > 0)
578 dopr_outch (buffer, currlen, maxlen, convert[--place]);
579
580 /* Left Justified spaces */
581 while (spadlen < 0) {
582 dopr_outch (buffer, currlen, maxlen, ' ');
583 ++spadlen;
584 }
585 }
586
587 static LDOUBLE abs_val(LDOUBLE value)
588 {
589 LDOUBLE result = value;
590
591 if (value < 0)
592 result = -value;
593
594 return result;
595 }
596
597 static LDOUBLE POW10(int exp)
598 {
599 LDOUBLE result = 1;
600
601 while (exp) {
602 result *= 10;
603 exp--;
604 }
605
606 return result;
607 }
608
609 static LLONG ROUND(LDOUBLE value)
610 {
611 LLONG intpart;
612
613 intpart = (LLONG)value;
614 value = value - intpart;
615 if (value >= 0.5) intpart++;
616
617 return intpart;
618 }
619
620 /* a replacement for modf that doesn't need the math library. Should
621 be portable, but slow */
622 static double my_modf(double x0, double *iptr)
623 {
624 int i;
625 long l;
626 double x = x0;
627 double f = 1.0;
628
629 for (i=0;i<100;i++) {
630 l = (long)x;
631 if (l <= (x+1) && l >= (x-1)) break;
632 x *= 0.1;
633 f *= 10.0;
634 }
635
636 if (i == 100) {
637 /* yikes! the number is beyond what we can handle. What do we do? */
638 (*iptr) = 0;
639 return 0;
640 }
641
642 if (i != 0) {
643 double i2;
644 double ret;
645
646 ret = my_modf(x0-l*f, &i2);
647 (*iptr) = l*f + i2;
648 return ret;
649 }
650
651 (*iptr) = l;
652 return x - (*iptr);
653 }
654
655
656 static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
657 LDOUBLE fvalue, int min, int max, int flags)
658 {
659 int signvalue = 0;
660 double ufvalue;
661 char iconvert[311];
662 char fconvert[311];
663 int iplace = 0;
664 int fplace = 0;
665 int padlen = 0; /* amount to pad */
666 int zpadlen = 0;
667 int caps = 0;
668 int idx;
669 double intpart;
670 double fracpart;
671 double temp;
672
673 /*
674 * AIX manpage says the default is 0, but Solaris says the default
675 * is 6, and sprintf on AIX defaults to 6
676 */
677 if (max < 0)
678 max = 6;
679
680 ufvalue = abs_val (fvalue);
681
682 if (fvalue < 0) {
683 signvalue = '-';
684 } else {
685 if (flags & DP_F_PLUS) { /* Do a sign (+/i) */
686 signvalue = '+';
687 } else {
688 if (flags & DP_F_SPACE)
689 signvalue = ' ';
690 }
691 }
692
693 #if 0
694 if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
695 #endif
696
697 #if 0
698 if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */
699 #endif
700
701 /*
702 * Sorry, we only support 16 digits past the decimal because of our
703 * conversion method
704 */
705 if (max > 16)
706 max = 16;
707
708 /* We "cheat" by converting the fractional part to integer by
709 * multiplying by a factor of 10
710 */
711
712 temp = ufvalue;
713 my_modf(temp, &intpart);
714
715 fracpart = ROUND((POW10(max)) * (ufvalue - intpart));
716
717 if (fracpart >= POW10(max)) {
718 intpart++;
719 fracpart -= POW10(max);
720 }
721
722
723 /* Convert integer part */
724 do {
725 temp = intpart*0.1;
726 my_modf(temp, &intpart);
727 idx = (int) ((temp -intpart +0.05)* 10.0);
728 /* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */
729 /* printf ("%llf, %f, %x\n", temp, intpart, idx); */
730 iconvert[iplace++] =
731 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
732 } while (intpart && (iplace < 311));
733 if (iplace == 311) iplace--;
734 iconvert[iplace] = 0;
735
736 /* Convert fractional part */
737 if (fracpart)
738 {
739 do {
740 temp = fracpart*0.1;
741 my_modf(temp, &fracpart);
742 idx = (int) ((temp -fracpart +0.05)* 10.0);
743 /* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */
744 /* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */
745 fconvert[fplace++] =
746 (caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
747 } while(fracpart && (fplace < 311));
748 if (fplace == 311) fplace--;
749 }
750 fconvert[fplace] = 0;
751
752 /* -1 for decimal point, another -1 if we are printing a sign */
753 padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
754 zpadlen = max - fplace;
755 if (zpadlen < 0) zpadlen = 0;
756 if (padlen < 0)
757 padlen = 0;
758 if (flags & DP_F_MINUS)
759 padlen = -padlen; /* Left Justifty */
760
761 if ((flags & DP_F_ZERO) && (padlen > 0)) {
762 if (signvalue) {
763 dopr_outch (buffer, currlen, maxlen, signvalue);
764 --padlen;
765 signvalue = 0;
766 }
767 while (padlen > 0) {
768 dopr_outch (buffer, currlen, maxlen, '0');
769 --padlen;
770 }
771 }
772 while (padlen > 0) {
773 dopr_outch (buffer, currlen, maxlen, ' ');
774 --padlen;
775 }
776 if (signvalue)
777 dopr_outch (buffer, currlen, maxlen, signvalue);
778
779 while (iplace > 0)
780 dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);
781
782 #ifdef DEBUG_SNPRINTF
783 printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen);
784 #endif
785
786 /*
787 * Decimal point. This should probably use locale to find the correct
788 * char to print out.
789 */
790 if (max > 0) {
791 dopr_outch (buffer, currlen, maxlen, '.');
792
793 while (zpadlen > 0) {
794 dopr_outch (buffer, currlen, maxlen, '0');
795 --zpadlen;
796 }
797
798 while (fplace > 0)
799 dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
800 }
801
802 while (padlen < 0) {
803 dopr_outch (buffer, currlen, maxlen, ' ');
804 ++padlen;
805 }
806 }
807
808 static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c)
809 {
810 if (*currlen < maxlen) {
811 buffer[(*currlen)] = c;
812 }
813 (*currlen)++;
814 }
815
816 int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
817 {
818 return dopr(str, count, fmt, args);
819 }
820 #endif
821
822 /* yes this really must be a ||. Don't muck with this (tridge)
823 *
824 * The logic for these two is that we need our own definition if the
825 * OS *either* has no definition of *sprintf, or if it does have one
826 * that doesn't work properly according to the autoconf test. Perhaps
827 * these should really be smb_snprintf to avoid conflicts with buggy
828 * linkers? -- mbp
829 */
830 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
831 int snprintf(char *str,size_t count,const char *fmt,...)
832 {
833 size_t ret;
834 va_list ap;
835
836 va_start(ap, fmt);
837 ret = vsnprintf(str, count, fmt, ap);
838 va_end(ap);
839 return ret;
840 }
841 #endif
842
843 #endif
844
845 #ifndef HAVE_VASPRINTF
846 int vasprintf(char **ptr, const char *format, va_list ap)
847 {
848 int ret;
849 va_list ap2;
850
851 VA_COPY(ap2, ap);
852
853 ret = vsnprintf(NULL, 0, format, ap2);
854 if (ret <= 0) return ret;
855
856 (*ptr) = (char *)malloc(ret+1);
857 if (!*ptr) return -1;
858
859 VA_COPY(ap2, ap);
860
861 ret = vsnprintf(*ptr, ret+1, format, ap2);
862
863 return ret;
864 }
865 #endif
866
867
868 #ifndef HAVE_ASPRINTF
869 int asprintf(char **ptr, const char *format, ...)
870 {
871 va_list ap;
872 int ret;
873
874 *ptr = NULL;
875 va_start(ap, format);
876 ret = vasprintf(ptr, format, ap);
877 va_end(ap);
878
879 return ret;
880 }
881 #endif
882
883 #ifdef TEST_SNPRINTF
884
885 int sprintf(char *str,const char *fmt,...);
886
887 int main (void)
888 {
889 char buf1[1024];
890 char buf2[1024];
891 char *fp_fmt[] = {
892 "%1.1f",
893 "%-1.5f",
894 "%1.5f",
895 "%123.9f",
896 "%10.5f",
897 "% 10.5f",
898 "%+22.9f",
899 "%+4.9f",
900 "%01.3f",
901 "%4f",
902 "%3.1f",
903 "%3.2f",
904 "%.0f",
905 "%f",
906 "-16.16f",
907 NULL
908 };
909 double fp_nums[] = { 6442452944.1234, -1.5, 134.21, 91340.2, 341.1234, 203.9, 0.96, 0.996,
910 0.9996, 1.996, 4.136, 5.030201, 0.00205,
911 /* END LIST */ 0};
912 char *int_fmt[] = {
913 "%-1.5d",
914 "%1.5d",
915 "%123.9d",
916 "%5.5d",
917 "%10.5d",
918 "% 10.5d",
919 "%+22.33d",
920 "%01.3d",
921 "%4d",
922 "%d",
923 NULL
924 };
925 long int_nums[] = { -1, 134, 91340, 341, 0203, 0};
926 char *str_fmt[] = {
927 "10.5s",
928 "5.10s",
929 "10.1s",
930 "0.10s",
931 "10.0s",
932 "1.10s",
933 "%s",
934 "%.1s",
935 "%.10s",
936 "%10s",
937 NULL
938 };
939 char *str_vals[] = {"hello", "a", "", "a longer string", NULL};
940 int x, y;
941 int fail = 0;
942 int num = 0;
943
944 printf ("Testing snprintf format codes against system sprintf...\n");
945
946 for (x = 0; fp_fmt[x] ; x++) {
947 for (y = 0; fp_nums[y] != 0 ; y++) {
948 int l1 = snprintf(NULL, 0, fp_fmt[x], fp_nums[y]);
949 int l2 = snprintf(buf1, sizeof(buf1), fp_fmt[x], fp_nums[y]);
950 sprintf (buf2, fp_fmt[x], fp_nums[y]);
951 if (strcmp (buf1, buf2)) {
952 printf("snprintf doesn't match Format: %s\n\tsnprintf = [%s]\n\t sprintf = [%s]\n",
953 fp_fmt[x], buf1, buf2);
954 fail++;
955 }
956 if (l1 != l2) {
957 printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, fp_fmt[x]);
958 fail++;
959 }
960 num++;
961 }
962 }
963
964 for (x = 0; int_fmt[x] ; x++) {
965 for (y = 0; int_nums[y] != 0 ; y++) {
966 int l1 = snprintf(NULL, 0, int_fmt[x], int_nums[y]);
967 int l2 = snprintf(buf1, sizeof(buf1), int_fmt[x], int_nums[y]);
968 sprintf (buf2, int_fmt[x], int_nums[y]);
969 if (strcmp (buf1, buf2)) {
970 printf("snprintf doesn't match Format: %s\n\tsnprintf = [%s]\n\t sprintf = [%s]\n",
971 int_fmt[x], buf1, buf2);
972 fail++;
973 }
974 if (l1 != l2) {
975 printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, int_fmt[x]);
976 fail++;
977 }
978 num++;
979 }
980 }
981
982 for (x = 0; str_fmt[x] ; x++) {
983 for (y = 0; str_vals[y] != 0 ; y++) {
984 int l1 = snprintf(NULL, 0, str_fmt[x], str_vals[y]);
985 int l2 = snprintf(buf1, sizeof(buf1), str_fmt[x], str_vals[y]);
986 sprintf (buf2, str_fmt[x], str_vals[y]);
987 if (strcmp (buf1, buf2)) {
988 printf("snprintf doesn't match Format: %s\n\tsnprintf = [%s]\n\t sprintf = [%s]\n",
989 str_fmt[x], buf1, buf2);
990 fail++;
991 }
992 if (l1 != l2) {
993 printf("snprintf l1 != l2 (%d %d) %s\n", l1, l2, str_fmt[x]);
994 fail++;
995 }
996 num++;
997 }
998 }
999
1000 printf ("%d tests failed out of %d.\n", fail, num);
1001
1002 printf("seeing how many digits we support\n");
1003 {
1004 double v0 = 0.12345678901234567890123456789012345678901;
1005 for (x=0; x<100; x++) {
1006 double p = pow(10, x);
1007 double r = v0*p;
1008 snprintf(buf1, sizeof(buf1), "%1.1f", r);
1009 sprintf(buf2, "%1.1f", r);
1010 if (strcmp(buf1, buf2)) {
1011 printf("we seem to support %d digits\n", x-1);
1012 break;
1013 }
1014 }
1015 }
1016
1017 return 0;
1018 }
1019 #endif /* TEST_SNPRINTF */