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1 | /* This is taken from cvslock. The same code is used in several |
2 | * freeware and GPLd applications. I contacted the email addresses | |
3 | * listed in the header and have been told that the code is probably | |
4 | * public domain, but I am still seeking confirmation from Patrick | |
5 | * Powell. The original code was posted to BugTraq by Patrick in 1995 | |
6 | * but without any notice as to the copyright or license status. | |
7 | * | |
8 | * October 1998, Andrew Tridgell (tridge@samba.anu.edu.au) | |
9 | */ | |
10 | ||
11 | /************************************************************** | |
12 | * Original: | |
13 | * Patrick Powell Tue Apr 11 09:48:21 PDT 1995 | |
14 | * A bombproof version of doprnt (dopr) included. | |
15 | * Sigh. This sort of thing is always nasty do deal with. Note that | |
16 | * the version here does not include floating point... | |
17 | * | |
18 | * snprintf() is used instead of sprintf() as it does limit checks | |
19 | * for string length. This covers a nasty loophole. | |
20 | * | |
21 | * The other functions are there to prevent NULL pointers from | |
22 | * causing nast effects. | |
23 | * | |
24 | * More Recently: | |
25 | * Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43 | |
26 | * This was ugly. It is still ugly. I opted out of floating point | |
27 | * numbers, but the formatter understands just about everything | |
28 | * from the normal C string format, at least as far as I can tell from | |
29 | * the Solaris 2.5 printf(3S) man page. | |
30 | * | |
31 | * Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1 | |
32 | * Ok, added some minimal floating point support, which means this | |
33 | * probably requires libm on most operating systems. Don't yet | |
34 | * support the exponent (e,E) and sigfig (g,G). Also, fmtint() | |
35 | * was pretty badly broken, it just wasn't being exercised in ways | |
36 | * which showed it, so that's been fixed. Also, formated the code | |
37 | * to mutt conventions, and removed dead code left over from the | |
38 | * original. Also, there is now a builtin-test, just compile with: | |
39 | * gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm | |
40 | * and run snprintf for results. | |
41 | * | |
42 | * Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i | |
43 | * The PGP code was using unsigned hexadecimal formats. | |
44 | * Unfortunately, unsigned formats simply didn't work. | |
45 | * | |
46 | * Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8 | |
47 | * The original code assumed that both snprintf() and vsnprintf() were | |
48 | * missing. Some systems only have snprintf() but not vsnprintf(), so | |
49 | * the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF. | |
50 | * | |
51 | **************************************************************/ | |
52 | ||
53 | #include "config.h" | |
54 | ||
55 | #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) | |
56 | ||
57 | #include <string.h> | |
58 | # include <ctype.h> | |
59 | #include <sys/types.h> | |
60 | ||
61 | /* Define this as a fall through, HAVE_STDARG_H is probably already set */ | |
62 | ||
63 | #define HAVE_VARARGS_H | |
64 | ||
65 | /* varargs declarations: */ | |
66 | ||
67 | #if defined(HAVE_STDARG_H) | |
68 | # include <stdarg.h> | |
69 | # define HAVE_STDARGS /* let's hope that works everywhere (mj) */ | |
70 | # define VA_LOCAL_DECL va_list ap | |
71 | # define VA_START(f) va_start(ap, f) | |
72 | # define VA_SHIFT(v,t) ; /* no-op for ANSI */ | |
73 | # define VA_END va_end(ap) | |
74 | #else | |
75 | # if defined(HAVE_VARARGS_H) | |
76 | # include <varargs.h> | |
77 | # undef HAVE_STDARGS | |
78 | # define VA_LOCAL_DECL va_list ap | |
79 | # define VA_START(f) va_start(ap) /* f is ignored! */ | |
80 | # define VA_SHIFT(v,t) v = va_arg(ap,t) | |
81 | # define VA_END va_end(ap) | |
82 | # else | |
83 | /*XX ** NO VARARGS ** XX*/ | |
84 | # endif | |
85 | #endif | |
86 | ||
87 | /*int snprintf (char *str, size_t count, const char *fmt, ...);*/ | |
88 | /*int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);*/ | |
89 | ||
90 | static void dopr (char *buffer, size_t maxlen, const char *format, | |
91 | va_list args); | |
92 | static void fmtstr (char *buffer, size_t *currlen, size_t maxlen, | |
93 | char *value, int flags, int min, int max); | |
94 | static void fmtint (char *buffer, size_t *currlen, size_t maxlen, | |
95 | long value, int base, int min, int max, int flags); | |
96 | static void fmtfp (char *buffer, size_t *currlen, size_t maxlen, | |
97 | long double fvalue, int min, int max, int flags); | |
98 | static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c ); | |
99 | ||
100 | /* | |
101 | * dopr(): poor man's version of doprintf | |
102 | */ | |
103 | ||
104 | /* format read states */ | |
105 | #define DP_S_DEFAULT 0 | |
106 | #define DP_S_FLAGS 1 | |
107 | #define DP_S_MIN 2 | |
108 | #define DP_S_DOT 3 | |
109 | #define DP_S_MAX 4 | |
110 | #define DP_S_MOD 5 | |
111 | #define DP_S_CONV 6 | |
112 | #define DP_S_DONE 7 | |
113 | ||
114 | /* format flags - Bits */ | |
115 | #define DP_F_MINUS (1 << 0) | |
116 | #define DP_F_PLUS (1 << 1) | |
117 | #define DP_F_SPACE (1 << 2) | |
118 | #define DP_F_NUM (1 << 3) | |
119 | #define DP_F_ZERO (1 << 4) | |
120 | #define DP_F_UP (1 << 5) | |
121 | #define DP_F_UNSIGNED (1 << 6) | |
122 | ||
123 | /* Conversion Flags */ | |
124 | #define DP_C_SHORT 1 | |
125 | #define DP_C_LONG 2 | |
126 | #define DP_C_LDOUBLE 3 | |
127 | ||
128 | #define char_to_int(p) (p - '0') | |
129 | #define MAX(p,q) ((p >= q) ? p : q) | |
130 | ||
131 | static void dopr (char *buffer, size_t maxlen, const char *format, va_list args) | |
132 | { | |
133 | char ch; | |
134 | long value; | |
135 | long double fvalue; | |
136 | char *strvalue; | |
137 | int min; | |
138 | int max; | |
139 | int state; | |
140 | int flags; | |
141 | int cflags; | |
142 | size_t currlen; | |
143 | ||
144 | state = DP_S_DEFAULT; | |
145 | currlen = flags = cflags = min = 0; | |
146 | max = -1; | |
147 | ch = *format++; | |
148 | ||
149 | while (state != DP_S_DONE) | |
150 | { | |
151 | if ((ch == '\0') || (currlen >= maxlen)) | |
152 | state = DP_S_DONE; | |
153 | ||
154 | switch(state) | |
155 | { | |
156 | case DP_S_DEFAULT: | |
157 | if (ch == '%') | |
158 | state = DP_S_FLAGS; | |
159 | else | |
160 | dopr_outch (buffer, &currlen, maxlen, ch); | |
161 | ch = *format++; | |
162 | break; | |
163 | case DP_S_FLAGS: | |
164 | switch (ch) | |
165 | { | |
166 | case '-': | |
167 | flags |= DP_F_MINUS; | |
168 | ch = *format++; | |
169 | break; | |
170 | case '+': | |
171 | flags |= DP_F_PLUS; | |
172 | ch = *format++; | |
173 | break; | |
174 | case ' ': | |
175 | flags |= DP_F_SPACE; | |
176 | ch = *format++; | |
177 | break; | |
178 | case '#': | |
179 | flags |= DP_F_NUM; | |
180 | ch = *format++; | |
181 | break; | |
182 | case '0': | |
183 | flags |= DP_F_ZERO; | |
184 | ch = *format++; | |
185 | break; | |
186 | default: | |
187 | state = DP_S_MIN; | |
188 | break; | |
189 | } | |
190 | break; | |
191 | case DP_S_MIN: | |
192 | if (isdigit((unsigned char)ch)) | |
193 | { | |
194 | min = 10*min + char_to_int (ch); | |
195 | ch = *format++; | |
196 | } | |
197 | else if (ch == '*') | |
198 | { | |
199 | min = va_arg (args, int); | |
200 | ch = *format++; | |
201 | state = DP_S_DOT; | |
202 | } | |
203 | else | |
204 | state = DP_S_DOT; | |
205 | break; | |
206 | case DP_S_DOT: | |
207 | if (ch == '.') | |
208 | { | |
209 | state = DP_S_MAX; | |
210 | ch = *format++; | |
211 | } | |
212 | else | |
213 | state = DP_S_MOD; | |
214 | break; | |
215 | case DP_S_MAX: | |
216 | if (isdigit((unsigned char)ch)) | |
217 | { | |
218 | if (max < 0) | |
219 | max = 0; | |
220 | max = 10*max + char_to_int (ch); | |
221 | ch = *format++; | |
222 | } | |
223 | else if (ch == '*') | |
224 | { | |
225 | max = va_arg (args, int); | |
226 | ch = *format++; | |
227 | state = DP_S_MOD; | |
228 | } | |
229 | else | |
230 | state = DP_S_MOD; | |
231 | break; | |
232 | case DP_S_MOD: | |
233 | /* Currently, we don't support Long Long, bummer */ | |
234 | switch (ch) | |
235 | { | |
236 | case 'h': | |
237 | cflags = DP_C_SHORT; | |
238 | ch = *format++; | |
239 | break; | |
240 | case 'l': | |
241 | cflags = DP_C_LONG; | |
242 | ch = *format++; | |
243 | break; | |
244 | case 'L': | |
245 | cflags = DP_C_LDOUBLE; | |
246 | ch = *format++; | |
247 | break; | |
248 | default: | |
249 | break; | |
250 | } | |
251 | state = DP_S_CONV; | |
252 | break; | |
253 | case DP_S_CONV: | |
254 | switch (ch) | |
255 | { | |
256 | case 'd': | |
257 | case 'i': | |
258 | if (cflags == DP_C_SHORT) | |
259 | value = va_arg (args, short int); | |
260 | else if (cflags == DP_C_LONG) | |
261 | value = va_arg (args, long int); | |
262 | else | |
263 | value = va_arg (args, int); | |
264 | fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); | |
265 | break; | |
266 | case 'o': | |
267 | flags |= DP_F_UNSIGNED; | |
268 | if (cflags == DP_C_SHORT) | |
269 | value = va_arg (args, unsigned short int); | |
270 | else if (cflags == DP_C_LONG) | |
271 | value = va_arg (args, unsigned long int); | |
272 | else | |
273 | value = va_arg (args, unsigned int); | |
274 | fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags); | |
275 | break; | |
276 | case 'u': | |
277 | flags |= DP_F_UNSIGNED; | |
278 | if (cflags == DP_C_SHORT) | |
279 | value = va_arg (args, unsigned short int); | |
280 | else if (cflags == DP_C_LONG) | |
281 | value = va_arg (args, unsigned long int); | |
282 | else | |
283 | value = va_arg (args, unsigned int); | |
284 | fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); | |
285 | break; | |
286 | case 'X': | |
287 | flags |= DP_F_UP; | |
288 | case 'x': | |
289 | flags |= DP_F_UNSIGNED; | |
290 | if (cflags == DP_C_SHORT) | |
291 | value = va_arg (args, unsigned short int); | |
292 | else if (cflags == DP_C_LONG) | |
293 | value = va_arg (args, unsigned long int); | |
294 | else | |
295 | value = va_arg (args, unsigned int); | |
296 | fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags); | |
297 | break; | |
298 | case 'f': | |
299 | if (cflags == DP_C_LDOUBLE) | |
300 | fvalue = va_arg (args, long double); | |
301 | else | |
302 | fvalue = va_arg (args, double); | |
303 | /* um, floating point? */ | |
304 | fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); | |
305 | break; | |
306 | case 'E': | |
307 | flags |= DP_F_UP; | |
308 | case 'e': | |
309 | if (cflags == DP_C_LDOUBLE) | |
310 | fvalue = va_arg (args, long double); | |
311 | else | |
312 | fvalue = va_arg (args, double); | |
313 | break; | |
314 | case 'G': | |
315 | flags |= DP_F_UP; | |
316 | case 'g': | |
317 | if (cflags == DP_C_LDOUBLE) | |
318 | fvalue = va_arg (args, long double); | |
319 | else | |
320 | fvalue = va_arg (args, double); | |
321 | break; | |
322 | case 'c': | |
323 | dopr_outch (buffer, &currlen, maxlen, va_arg (args, int)); | |
324 | break; | |
325 | case 's': | |
326 | strvalue = va_arg (args, char *); | |
327 | if (max < 0) | |
328 | max = maxlen; /* ie, no max */ | |
329 | fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max); | |
330 | break; | |
331 | case 'p': | |
332 | strvalue = va_arg (args, void *); | |
333 | fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags); | |
334 | break; | |
335 | case 'n': | |
336 | if (cflags == DP_C_SHORT) | |
337 | { | |
338 | short int *num; | |
339 | num = va_arg (args, short int *); | |
340 | *num = currlen; | |
341 | } | |
342 | else if (cflags == DP_C_LONG) | |
343 | { | |
344 | long int *num; | |
345 | num = va_arg (args, long int *); | |
346 | *num = currlen; | |
347 | } | |
348 | else | |
349 | { | |
350 | int *num; | |
351 | num = va_arg (args, int *); | |
352 | *num = currlen; | |
353 | } | |
354 | break; | |
355 | case '%': | |
356 | dopr_outch (buffer, &currlen, maxlen, ch); | |
357 | break; | |
358 | case 'w': | |
359 | /* not supported yet, treat as next char */ | |
360 | ch = *format++; | |
361 | break; | |
362 | default: | |
363 | /* Unknown, skip */ | |
364 | break; | |
365 | } | |
366 | ch = *format++; | |
367 | state = DP_S_DEFAULT; | |
368 | flags = cflags = min = 0; | |
369 | max = -1; | |
370 | break; | |
371 | case DP_S_DONE: | |
372 | break; | |
373 | default: | |
374 | /* hmm? */ | |
375 | break; /* some picky compilers need this */ | |
376 | } | |
377 | } | |
378 | if (currlen < maxlen - 1) | |
379 | buffer[currlen] = '\0'; | |
380 | else | |
381 | buffer[maxlen - 1] = '\0'; | |
382 | } | |
383 | ||
384 | static void fmtstr (char *buffer, size_t *currlen, size_t maxlen, | |
385 | char *value, int flags, int min, int max) | |
386 | { | |
387 | int padlen, strln; /* amount to pad */ | |
388 | int cnt = 0; | |
389 | ||
390 | if (value == 0) | |
391 | { | |
392 | value = "<NULL>"; | |
393 | } | |
394 | ||
395 | for (strln = 0; value[strln]; ++strln); /* strlen */ | |
396 | padlen = min - strln; | |
397 | if (padlen < 0) | |
398 | padlen = 0; | |
399 | if (flags & DP_F_MINUS) | |
400 | padlen = -padlen; /* Left Justify */ | |
401 | ||
402 | while ((padlen > 0) && (cnt < max)) | |
403 | { | |
404 | dopr_outch (buffer, currlen, maxlen, ' '); | |
405 | --padlen; | |
406 | ++cnt; | |
407 | } | |
408 | while (*value && (cnt < max)) | |
409 | { | |
410 | dopr_outch (buffer, currlen, maxlen, *value++); | |
411 | ++cnt; | |
412 | } | |
413 | while ((padlen < 0) && (cnt < max)) | |
414 | { | |
415 | dopr_outch (buffer, currlen, maxlen, ' '); | |
416 | ++padlen; | |
417 | ++cnt; | |
418 | } | |
419 | } | |
420 | ||
421 | /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */ | |
422 | ||
423 | static void fmtint (char *buffer, size_t *currlen, size_t maxlen, | |
424 | long value, int base, int min, int max, int flags) | |
425 | { | |
426 | int signvalue = 0; | |
427 | unsigned long uvalue; | |
428 | char convert[20]; | |
429 | int place = 0; | |
430 | int spadlen = 0; /* amount to space pad */ | |
431 | int zpadlen = 0; /* amount to zero pad */ | |
432 | int caps = 0; | |
433 | ||
434 | if (max < 0) | |
435 | max = 0; | |
436 | ||
437 | uvalue = value; | |
438 | ||
439 | if(!(flags & DP_F_UNSIGNED)) | |
440 | { | |
441 | if( value < 0 ) { | |
442 | signvalue = '-'; | |
443 | uvalue = -value; | |
444 | } | |
445 | else | |
446 | if (flags & DP_F_PLUS) /* Do a sign (+/i) */ | |
447 | signvalue = '+'; | |
448 | else | |
449 | if (flags & DP_F_SPACE) | |
450 | signvalue = ' '; | |
451 | } | |
452 | ||
453 | if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ | |
454 | ||
455 | do { | |
456 | convert[place++] = | |
457 | (caps? "0123456789ABCDEF":"0123456789abcdef") | |
458 | [uvalue % (unsigned)base ]; | |
459 | uvalue = (uvalue / (unsigned)base ); | |
460 | } while(uvalue && (place < 20)); | |
461 | if (place == 20) place--; | |
462 | convert[place] = 0; | |
463 | ||
464 | zpadlen = max - place; | |
465 | spadlen = min - MAX (max, place) - (signvalue ? 1 : 0); | |
466 | if (zpadlen < 0) zpadlen = 0; | |
467 | if (spadlen < 0) spadlen = 0; | |
468 | if (flags & DP_F_ZERO) | |
469 | { | |
470 | zpadlen = MAX(zpadlen, spadlen); | |
471 | spadlen = 0; | |
472 | } | |
473 | if (flags & DP_F_MINUS) | |
474 | spadlen = -spadlen; /* Left Justifty */ | |
475 | ||
476 | #ifdef DEBUG_SNPRINTF | |
477 | dprint (1, (debugfile, "zpad: %d, spad: %d, min: %d, max: %d, place: %d\n", | |
478 | zpadlen, spadlen, min, max, place)); | |
479 | #endif | |
480 | ||
481 | /* Spaces */ | |
482 | while (spadlen > 0) | |
483 | { | |
484 | dopr_outch (buffer, currlen, maxlen, ' '); | |
485 | --spadlen; | |
486 | } | |
487 | ||
488 | /* Sign */ | |
489 | if (signvalue) | |
490 | dopr_outch (buffer, currlen, maxlen, signvalue); | |
491 | ||
492 | /* Zeros */ | |
493 | if (zpadlen > 0) | |
494 | { | |
495 | while (zpadlen > 0) | |
496 | { | |
497 | dopr_outch (buffer, currlen, maxlen, '0'); | |
498 | --zpadlen; | |
499 | } | |
500 | } | |
501 | ||
502 | /* Digits */ | |
503 | while (place > 0) | |
504 | dopr_outch (buffer, currlen, maxlen, convert[--place]); | |
505 | ||
506 | /* Left Justified spaces */ | |
507 | while (spadlen < 0) { | |
508 | dopr_outch (buffer, currlen, maxlen, ' '); | |
509 | ++spadlen; | |
510 | } | |
511 | } | |
512 | ||
513 | static long double abs_val (long double value) | |
514 | { | |
515 | long double result = value; | |
516 | ||
517 | if (value < 0) | |
518 | result = -value; | |
519 | ||
520 | return result; | |
521 | } | |
522 | ||
523 | static long double pow10 (int exp) | |
524 | { | |
525 | long double result = 1; | |
526 | ||
527 | while (exp) | |
528 | { | |
529 | result *= 10; | |
530 | exp--; | |
531 | } | |
532 | ||
533 | return result; | |
534 | } | |
535 | ||
536 | static long round (long double value) | |
537 | { | |
538 | long intpart; | |
539 | ||
540 | intpart = value; | |
541 | value = value - intpart; | |
542 | if (value >= 0.5) | |
543 | intpart++; | |
544 | ||
545 | return intpart; | |
546 | } | |
547 | ||
548 | static void fmtfp (char *buffer, size_t *currlen, size_t maxlen, | |
549 | long double fvalue, int min, int max, int flags) | |
550 | { | |
551 | int signvalue = 0; | |
552 | long double ufvalue; | |
553 | char iconvert[20]; | |
554 | char fconvert[20]; | |
555 | int iplace = 0; | |
556 | int fplace = 0; | |
557 | int padlen = 0; /* amount to pad */ | |
558 | int zpadlen = 0; | |
559 | int caps = 0; | |
560 | long intpart; | |
561 | long fracpart; | |
562 | ||
563 | /* | |
564 | * AIX manpage says the default is 0, but Solaris says the default | |
565 | * is 6, and sprintf on AIX defaults to 6 | |
566 | */ | |
567 | if (max < 0) | |
568 | max = 6; | |
569 | ||
570 | ufvalue = abs_val (fvalue); | |
571 | ||
572 | if (fvalue < 0) | |
573 | signvalue = '-'; | |
574 | else | |
575 | if (flags & DP_F_PLUS) /* Do a sign (+/i) */ | |
576 | signvalue = '+'; | |
577 | else | |
578 | if (flags & DP_F_SPACE) | |
579 | signvalue = ' '; | |
580 | ||
581 | #if 0 | |
582 | if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ | |
583 | #endif | |
584 | ||
585 | intpart = ufvalue; | |
586 | ||
587 | /* | |
588 | * Sorry, we only support 9 digits past the decimal because of our | |
589 | * conversion method | |
590 | */ | |
591 | if (max > 9) | |
592 | max = 9; | |
593 | ||
594 | /* We "cheat" by converting the fractional part to integer by | |
595 | * multiplying by a factor of 10 | |
596 | */ | |
597 | fracpart = round ((pow10 (max)) * (ufvalue - intpart)); | |
598 | ||
599 | if (fracpart >= pow10 (max)) | |
600 | { | |
601 | intpart++; | |
602 | fracpart -= pow10 (max); | |
603 | } | |
604 | ||
605 | #ifdef DEBUG_SNPRINTF | |
606 | dprint (1, (debugfile, "fmtfp: %f =? %d.%d\n", fvalue, intpart, fracpart)); | |
607 | #endif | |
608 | ||
609 | /* Convert integer part */ | |
610 | do { | |
611 | iconvert[iplace++] = | |
612 | (caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10]; | |
613 | intpart = (intpart / 10); | |
614 | } while(intpart && (iplace < 20)); | |
615 | if (iplace == 20) iplace--; | |
616 | iconvert[iplace] = 0; | |
617 | ||
618 | /* Convert fractional part */ | |
619 | do { | |
620 | fconvert[fplace++] = | |
621 | (caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10]; | |
622 | fracpart = (fracpart / 10); | |
623 | } while(fracpart && (fplace < 20)); | |
624 | if (fplace == 20) fplace--; | |
625 | fconvert[fplace] = 0; | |
626 | ||
627 | /* -1 for decimal point, another -1 if we are printing a sign */ | |
628 | padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); | |
629 | zpadlen = max - fplace; | |
630 | if (zpadlen < 0) | |
631 | zpadlen = 0; | |
632 | if (padlen < 0) | |
633 | padlen = 0; | |
634 | if (flags & DP_F_MINUS) | |
635 | padlen = -padlen; /* Left Justifty */ | |
636 | ||
637 | if ((flags & DP_F_ZERO) && (padlen > 0)) | |
638 | { | |
639 | if (signvalue) | |
640 | { | |
641 | dopr_outch (buffer, currlen, maxlen, signvalue); | |
642 | --padlen; | |
643 | signvalue = 0; | |
644 | } | |
645 | while (padlen > 0) | |
646 | { | |
647 | dopr_outch (buffer, currlen, maxlen, '0'); | |
648 | --padlen; | |
649 | } | |
650 | } | |
651 | while (padlen > 0) | |
652 | { | |
653 | dopr_outch (buffer, currlen, maxlen, ' '); | |
654 | --padlen; | |
655 | } | |
656 | if (signvalue) | |
657 | dopr_outch (buffer, currlen, maxlen, signvalue); | |
658 | ||
659 | while (iplace > 0) | |
660 | dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]); | |
661 | ||
662 | /* | |
663 | * Decimal point. This should probably use locale to find the correct | |
664 | * char to print out. | |
665 | */ | |
666 | dopr_outch (buffer, currlen, maxlen, '.'); | |
667 | ||
668 | while (fplace > 0) | |
669 | dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]); | |
670 | ||
671 | while (zpadlen > 0) | |
672 | { | |
673 | dopr_outch (buffer, currlen, maxlen, '0'); | |
674 | --zpadlen; | |
675 | } | |
676 | ||
677 | while (padlen < 0) | |
678 | { | |
679 | dopr_outch (buffer, currlen, maxlen, ' '); | |
680 | ++padlen; | |
681 | } | |
682 | } | |
683 | ||
684 | static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c) | |
685 | { | |
686 | if (*currlen < maxlen) | |
687 | buffer[(*currlen)++] = c; | |
688 | } | |
689 | #endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */ | |
690 | ||
691 | #ifndef HAVE_VSNPRINTF | |
692 | int vsnprintf (char *str, size_t count, const char *fmt, va_list args) | |
693 | { | |
694 | str[0] = 0; | |
695 | dopr(str, count, fmt, args); | |
696 | return(strlen(str)); | |
697 | } | |
698 | #endif /* !HAVE_VSNPRINTF */ | |
699 | ||
700 | #ifndef HAVE_SNPRINTF | |
701 | /* VARARGS3 */ | |
702 | #ifdef HAVE_STDARGS | |
703 | int snprintf (char *str,size_t count,const char *fmt,...) | |
704 | #else | |
705 | int snprintf (va_alist) va_dcl | |
706 | #endif | |
707 | { | |
708 | #ifndef HAVE_STDARGS | |
709 | char *str; | |
710 | size_t count; | |
711 | char *fmt; | |
712 | #endif | |
713 | VA_LOCAL_DECL; | |
714 | ||
715 | VA_START (fmt); | |
716 | VA_SHIFT (str, char *); | |
717 | VA_SHIFT (count, size_t ); | |
718 | VA_SHIFT (fmt, char *); | |
719 | (void) vsnprintf(str, count, fmt, ap); | |
720 | VA_END; | |
721 | return(strlen(str)); | |
722 | } | |
723 | ||
724 | #ifdef TEST_SNPRINTF | |
725 | #ifndef LONG_STRING | |
726 | #define LONG_STRING 1024 | |
727 | #endif | |
728 | int main (void) | |
729 | { | |
730 | char buf1[LONG_STRING]; | |
731 | char buf2[LONG_STRING]; | |
732 | char *fp_fmt[] = { | |
733 | "%-1.5f", | |
734 | "%1.5f", | |
735 | "%123.9f", | |
736 | "%10.5f", | |
737 | "% 10.5f", | |
738 | "%+22.9f", | |
739 | "%+4.9f", | |
740 | "%01.3f", | |
741 | "%4f", | |
742 | "%3.1f", | |
743 | "%3.2f", | |
744 | NULL | |
745 | }; | |
746 | double fp_nums[] = { -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996, | |
747 | 0.9996, 1.996, 4.136, 0}; | |
748 | char *int_fmt[] = { | |
749 | "%-1.5d", | |
750 | "%1.5d", | |
751 | "%123.9d", | |
752 | "%5.5d", | |
753 | "%10.5d", | |
754 | "% 10.5d", | |
755 | "%+22.33d", | |
756 | "%01.3d", | |
757 | "%4d", | |
758 | NULL | |
759 | }; | |
760 | long int_nums[] = { -1, 134, 91340, 341, 0203, 0}; | |
761 | int x, y; | |
762 | int fail = 0; | |
763 | int num = 0; | |
764 | ||
765 | printf ("Testing snprintf format codes against system sprintf...\n"); | |
766 | ||
767 | for (x = 0; fp_fmt[x] != NULL ; x++) | |
768 | for (y = 0; fp_nums[y] != 0 ; y++) | |
769 | { | |
770 | snprintf (buf1, sizeof (buf1), fp_fmt[x], fp_nums[y]); | |
771 | sprintf (buf2, fp_fmt[x], fp_nums[y]); | |
772 | if (strcmp (buf1, buf2)) | |
773 | { | |
774 | printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n", | |
775 | fp_fmt[x], buf1, buf2); | |
776 | fail++; | |
777 | } | |
778 | num++; | |
779 | } | |
780 | ||
781 | for (x = 0; int_fmt[x] != NULL ; x++) | |
782 | for (y = 0; int_nums[y] != 0 ; y++) | |
783 | { | |
784 | snprintf (buf1, sizeof (buf1), int_fmt[x], int_nums[y]); | |
785 | sprintf (buf2, int_fmt[x], int_nums[y]); | |
786 | if (strcmp (buf1, buf2)) | |
787 | { | |
788 | printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n", | |
789 | int_fmt[x], buf1, buf2); | |
790 | fail++; | |
791 | } | |
792 | num++; | |
793 | } | |
794 | printf ("%d tests failed out of %d.\n", fail, num); | |
795 | } | |
796 | #endif /* SNPRINTF_TEST */ | |
797 | ||
798 | #else | |
799 | /* keep compilers happy about empty files */ | |
800 | void dummy_snprintf(void) {} | |
801 | #endif /* !HAVE_SNPRINTF */ |