Commit | Line | Data |
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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 | * | |
10600500 AT |
48 | * Andrew Tridgell (tridge@samba.anu.edu.au) Oct 1998 |
49 | * fixed handling of %.0f | |
50 | * added test for HAVE_LONG_DOUBLE | |
51 | * | |
f8be5ef4 AT |
52 | **************************************************************/ |
53 | ||
54 | #include "config.h" | |
55 | ||
f8be5ef4 AT |
56 | #include <string.h> |
57 | # include <ctype.h> | |
58 | #include <sys/types.h> | |
59 | ||
10600500 AT |
60 | #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) |
61 | ||
f8be5ef4 AT |
62 | /* Define this as a fall through, HAVE_STDARG_H is probably already set */ |
63 | ||
64 | #define HAVE_VARARGS_H | |
65 | ||
66 | /* varargs declarations: */ | |
67 | ||
68 | #if defined(HAVE_STDARG_H) | |
69 | # include <stdarg.h> | |
70 | # define HAVE_STDARGS /* let's hope that works everywhere (mj) */ | |
71 | # define VA_LOCAL_DECL va_list ap | |
72 | # define VA_START(f) va_start(ap, f) | |
73 | # define VA_SHIFT(v,t) ; /* no-op for ANSI */ | |
74 | # define VA_END va_end(ap) | |
75 | #else | |
76 | # if defined(HAVE_VARARGS_H) | |
77 | # include <varargs.h> | |
78 | # undef HAVE_STDARGS | |
79 | # define VA_LOCAL_DECL va_list ap | |
80 | # define VA_START(f) va_start(ap) /* f is ignored! */ | |
81 | # define VA_SHIFT(v,t) v = va_arg(ap,t) | |
82 | # define VA_END va_end(ap) | |
83 | # else | |
84 | /*XX ** NO VARARGS ** XX*/ | |
85 | # endif | |
86 | #endif | |
87 | ||
10600500 AT |
88 | #ifdef HAVE_LONG_DOUBLE |
89 | #define LDOUBLE long double | |
90 | #else | |
91 | #define LDOUBLE double | |
92 | #endif | |
93 | ||
f8be5ef4 AT |
94 | /*int snprintf (char *str, size_t count, const char *fmt, ...);*/ |
95 | /*int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);*/ | |
96 | ||
97 | static void 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, | |
10600500 | 104 | LDOUBLE fvalue, int min, int max, int flags); |
f8be5ef4 AT |
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 | ||
135 | #define char_to_int(p) (p - '0') | |
136 | #define MAX(p,q) ((p >= q) ? p : q) | |
137 | ||
138 | static void dopr (char *buffer, size_t maxlen, const char *format, va_list args) | |
139 | { | |
140 | char ch; | |
141 | long value; | |
10600500 | 142 | LDOUBLE fvalue; |
f8be5ef4 AT |
143 | char *strvalue; |
144 | int min; | |
145 | int max; | |
146 | int state; | |
147 | int flags; | |
148 | int cflags; | |
149 | size_t currlen; | |
150 | ||
151 | state = DP_S_DEFAULT; | |
152 | currlen = flags = cflags = min = 0; | |
153 | max = -1; | |
154 | ch = *format++; | |
155 | ||
156 | while (state != DP_S_DONE) | |
157 | { | |
158 | if ((ch == '\0') || (currlen >= maxlen)) | |
159 | state = DP_S_DONE; | |
160 | ||
161 | switch(state) | |
162 | { | |
163 | case DP_S_DEFAULT: | |
164 | if (ch == '%') | |
165 | state = DP_S_FLAGS; | |
166 | else | |
167 | dopr_outch (buffer, &currlen, maxlen, ch); | |
168 | ch = *format++; | |
169 | break; | |
170 | case DP_S_FLAGS: | |
171 | switch (ch) | |
172 | { | |
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 | { | |
201 | min = 10*min + char_to_int (ch); | |
202 | ch = *format++; | |
203 | } | |
204 | else if (ch == '*') | |
205 | { | |
206 | min = va_arg (args, int); | |
207 | ch = *format++; | |
208 | state = DP_S_DOT; | |
209 | } | |
210 | else | |
211 | state = DP_S_DOT; | |
212 | break; | |
213 | case DP_S_DOT: | |
214 | if (ch == '.') | |
215 | { | |
216 | state = DP_S_MAX; | |
217 | ch = *format++; | |
218 | } | |
219 | else | |
220 | state = DP_S_MOD; | |
221 | break; | |
222 | case DP_S_MAX: | |
223 | if (isdigit((unsigned char)ch)) | |
224 | { | |
225 | if (max < 0) | |
226 | max = 0; | |
227 | max = 10*max + char_to_int (ch); | |
228 | ch = *format++; | |
229 | } | |
230 | else if (ch == '*') | |
231 | { | |
232 | max = va_arg (args, int); | |
233 | ch = *format++; | |
234 | state = DP_S_MOD; | |
235 | } | |
236 | else | |
237 | state = DP_S_MOD; | |
238 | break; | |
239 | case DP_S_MOD: | |
240 | /* Currently, we don't support Long Long, bummer */ | |
241 | switch (ch) | |
242 | { | |
243 | case 'h': | |
244 | cflags = DP_C_SHORT; | |
245 | ch = *format++; | |
246 | break; | |
247 | case 'l': | |
248 | cflags = DP_C_LONG; | |
249 | ch = *format++; | |
250 | break; | |
251 | case 'L': | |
252 | cflags = DP_C_LDOUBLE; | |
253 | ch = *format++; | |
254 | break; | |
255 | default: | |
256 | break; | |
257 | } | |
258 | state = DP_S_CONV; | |
259 | break; | |
260 | case DP_S_CONV: | |
261 | switch (ch) | |
262 | { | |
263 | case 'd': | |
264 | case 'i': | |
265 | if (cflags == DP_C_SHORT) | |
266 | value = va_arg (args, short int); | |
267 | else if (cflags == DP_C_LONG) | |
268 | value = va_arg (args, long int); | |
269 | else | |
270 | value = va_arg (args, int); | |
271 | fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); | |
272 | break; | |
273 | case 'o': | |
274 | flags |= DP_F_UNSIGNED; | |
275 | if (cflags == DP_C_SHORT) | |
276 | value = va_arg (args, unsigned short int); | |
277 | else if (cflags == DP_C_LONG) | |
2f098547 | 278 | value = (long)va_arg (args, unsigned long int); |
f8be5ef4 | 279 | else |
2f098547 | 280 | value = (long)va_arg (args, unsigned int); |
f8be5ef4 AT |
281 | fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags); |
282 | break; | |
283 | case 'u': | |
284 | flags |= DP_F_UNSIGNED; | |
285 | if (cflags == DP_C_SHORT) | |
286 | value = va_arg (args, unsigned short int); | |
287 | else if (cflags == DP_C_LONG) | |
2f098547 | 288 | value = (long)va_arg (args, unsigned long int); |
f8be5ef4 | 289 | else |
2f098547 | 290 | value = (long)va_arg (args, unsigned int); |
f8be5ef4 AT |
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 short int); | |
299 | else if (cflags == DP_C_LONG) | |
2f098547 | 300 | value = (long)va_arg (args, unsigned long int); |
f8be5ef4 | 301 | else |
2f098547 | 302 | value = (long)va_arg (args, unsigned int); |
f8be5ef4 AT |
303 | fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags); |
304 | break; | |
305 | case 'f': | |
306 | if (cflags == DP_C_LDOUBLE) | |
10600500 | 307 | fvalue = va_arg (args, LDOUBLE); |
f8be5ef4 AT |
308 | else |
309 | fvalue = va_arg (args, double); | |
310 | /* um, floating point? */ | |
311 | fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); | |
312 | break; | |
313 | case 'E': | |
314 | flags |= DP_F_UP; | |
315 | case 'e': | |
316 | if (cflags == DP_C_LDOUBLE) | |
10600500 | 317 | fvalue = va_arg (args, LDOUBLE); |
f8be5ef4 AT |
318 | else |
319 | fvalue = va_arg (args, double); | |
320 | break; | |
321 | case 'G': | |
322 | flags |= DP_F_UP; | |
323 | case 'g': | |
324 | if (cflags == DP_C_LDOUBLE) | |
10600500 | 325 | fvalue = va_arg (args, LDOUBLE); |
f8be5ef4 AT |
326 | else |
327 | fvalue = va_arg (args, double); | |
328 | break; | |
329 | case 'c': | |
330 | dopr_outch (buffer, &currlen, maxlen, va_arg (args, int)); | |
331 | break; | |
332 | case 's': | |
333 | strvalue = va_arg (args, char *); | |
334 | if (max < 0) | |
335 | max = maxlen; /* ie, no max */ | |
336 | fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max); | |
337 | break; | |
338 | case 'p': | |
339 | strvalue = va_arg (args, void *); | |
340 | fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags); | |
341 | break; | |
342 | case 'n': | |
343 | if (cflags == DP_C_SHORT) | |
344 | { | |
345 | short int *num; | |
346 | num = va_arg (args, short int *); | |
347 | *num = currlen; | |
348 | } | |
349 | else if (cflags == DP_C_LONG) | |
350 | { | |
351 | long int *num; | |
352 | num = va_arg (args, long int *); | |
2f098547 | 353 | *num = (long int)currlen; |
f8be5ef4 AT |
354 | } |
355 | else | |
356 | { | |
357 | int *num; | |
358 | num = va_arg (args, int *); | |
359 | *num = currlen; | |
360 | } | |
361 | break; | |
362 | case '%': | |
363 | dopr_outch (buffer, &currlen, maxlen, ch); | |
364 | break; | |
365 | case 'w': | |
366 | /* not supported yet, treat as next char */ | |
367 | ch = *format++; | |
368 | break; | |
369 | default: | |
370 | /* Unknown, skip */ | |
371 | break; | |
372 | } | |
373 | ch = *format++; | |
374 | state = DP_S_DEFAULT; | |
375 | flags = cflags = min = 0; | |
376 | max = -1; | |
377 | break; | |
378 | case DP_S_DONE: | |
379 | break; | |
380 | default: | |
381 | /* hmm? */ | |
382 | break; /* some picky compilers need this */ | |
383 | } | |
384 | } | |
385 | if (currlen < maxlen - 1) | |
386 | buffer[currlen] = '\0'; | |
387 | else | |
388 | buffer[maxlen - 1] = '\0'; | |
389 | } | |
390 | ||
391 | static void fmtstr (char *buffer, size_t *currlen, size_t maxlen, | |
392 | char *value, int flags, int min, int max) | |
393 | { | |
394 | int padlen, strln; /* amount to pad */ | |
395 | int cnt = 0; | |
396 | ||
397 | if (value == 0) | |
398 | { | |
399 | value = "<NULL>"; | |
400 | } | |
401 | ||
402 | for (strln = 0; value[strln]; ++strln); /* strlen */ | |
403 | padlen = min - strln; | |
404 | if (padlen < 0) | |
405 | padlen = 0; | |
406 | if (flags & DP_F_MINUS) | |
407 | padlen = -padlen; /* Left Justify */ | |
408 | ||
409 | while ((padlen > 0) && (cnt < max)) | |
410 | { | |
411 | dopr_outch (buffer, currlen, maxlen, ' '); | |
412 | --padlen; | |
413 | ++cnt; | |
414 | } | |
415 | while (*value && (cnt < max)) | |
416 | { | |
417 | dopr_outch (buffer, currlen, maxlen, *value++); | |
418 | ++cnt; | |
419 | } | |
420 | while ((padlen < 0) && (cnt < max)) | |
421 | { | |
422 | dopr_outch (buffer, currlen, maxlen, ' '); | |
423 | ++padlen; | |
424 | ++cnt; | |
425 | } | |
426 | } | |
427 | ||
428 | /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */ | |
429 | ||
430 | static void fmtint (char *buffer, size_t *currlen, size_t maxlen, | |
431 | long value, int base, int min, int max, int flags) | |
432 | { | |
433 | int signvalue = 0; | |
434 | unsigned long uvalue; | |
435 | char convert[20]; | |
436 | int place = 0; | |
437 | int spadlen = 0; /* amount to space pad */ | |
438 | int zpadlen = 0; /* amount to zero pad */ | |
439 | int caps = 0; | |
440 | ||
441 | if (max < 0) | |
442 | max = 0; | |
443 | ||
444 | uvalue = value; | |
445 | ||
446 | if(!(flags & DP_F_UNSIGNED)) | |
447 | { | |
448 | if( value < 0 ) { | |
449 | signvalue = '-'; | |
450 | uvalue = -value; | |
451 | } | |
452 | else | |
453 | if (flags & DP_F_PLUS) /* Do a sign (+/i) */ | |
454 | signvalue = '+'; | |
455 | else | |
456 | if (flags & DP_F_SPACE) | |
457 | signvalue = ' '; | |
458 | } | |
459 | ||
460 | if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ | |
461 | ||
462 | do { | |
463 | convert[place++] = | |
464 | (caps? "0123456789ABCDEF":"0123456789abcdef") | |
465 | [uvalue % (unsigned)base ]; | |
466 | uvalue = (uvalue / (unsigned)base ); | |
467 | } while(uvalue && (place < 20)); | |
468 | if (place == 20) place--; | |
469 | convert[place] = 0; | |
470 | ||
471 | zpadlen = max - place; | |
472 | spadlen = min - MAX (max, place) - (signvalue ? 1 : 0); | |
473 | if (zpadlen < 0) zpadlen = 0; | |
474 | if (spadlen < 0) spadlen = 0; | |
475 | if (flags & DP_F_ZERO) | |
476 | { | |
477 | zpadlen = MAX(zpadlen, spadlen); | |
478 | spadlen = 0; | |
479 | } | |
480 | if (flags & DP_F_MINUS) | |
481 | spadlen = -spadlen; /* Left Justifty */ | |
482 | ||
483 | #ifdef DEBUG_SNPRINTF | |
10600500 AT |
484 | printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n", |
485 | zpadlen, spadlen, min, max, place); | |
f8be5ef4 AT |
486 | #endif |
487 | ||
488 | /* Spaces */ | |
489 | while (spadlen > 0) | |
490 | { | |
491 | dopr_outch (buffer, currlen, maxlen, ' '); | |
492 | --spadlen; | |
493 | } | |
494 | ||
495 | /* Sign */ | |
496 | if (signvalue) | |
497 | dopr_outch (buffer, currlen, maxlen, signvalue); | |
498 | ||
499 | /* Zeros */ | |
500 | if (zpadlen > 0) | |
501 | { | |
502 | while (zpadlen > 0) | |
503 | { | |
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]); | |
512 | ||
513 | /* Left Justified spaces */ | |
514 | while (spadlen < 0) { | |
515 | dopr_outch (buffer, currlen, maxlen, ' '); | |
516 | ++spadlen; | |
517 | } | |
518 | } | |
519 | ||
10600500 | 520 | static LDOUBLE abs_val (LDOUBLE value) |
f8be5ef4 | 521 | { |
10600500 | 522 | LDOUBLE result = value; |
f8be5ef4 AT |
523 | |
524 | if (value < 0) | |
525 | result = -value; | |
526 | ||
527 | return result; | |
528 | } | |
529 | ||
10600500 | 530 | static LDOUBLE pow10 (int exp) |
f8be5ef4 | 531 | { |
10600500 | 532 | LDOUBLE result = 1; |
f8be5ef4 AT |
533 | |
534 | while (exp) | |
535 | { | |
536 | result *= 10; | |
537 | exp--; | |
538 | } | |
539 | ||
540 | return result; | |
541 | } | |
542 | ||
10600500 | 543 | static long round (LDOUBLE value) |
f8be5ef4 AT |
544 | { |
545 | long intpart; | |
546 | ||
2f098547 | 547 | intpart = (long)value; |
f8be5ef4 AT |
548 | value = value - intpart; |
549 | if (value >= 0.5) | |
550 | intpart++; | |
551 | ||
552 | return intpart; | |
553 | } | |
554 | ||
555 | static void fmtfp (char *buffer, size_t *currlen, size_t maxlen, | |
10600500 | 556 | LDOUBLE fvalue, int min, int max, int flags) |
f8be5ef4 AT |
557 | { |
558 | int signvalue = 0; | |
10600500 | 559 | LDOUBLE ufvalue; |
f8be5ef4 AT |
560 | char iconvert[20]; |
561 | char fconvert[20]; | |
562 | int iplace = 0; | |
563 | int fplace = 0; | |
564 | int padlen = 0; /* amount to pad */ | |
565 | int zpadlen = 0; | |
566 | int caps = 0; | |
567 | long intpart; | |
568 | long fracpart; | |
569 | ||
570 | /* | |
571 | * AIX manpage says the default is 0, but Solaris says the default | |
572 | * is 6, and sprintf on AIX defaults to 6 | |
573 | */ | |
574 | if (max < 0) | |
575 | max = 6; | |
576 | ||
577 | ufvalue = abs_val (fvalue); | |
578 | ||
579 | if (fvalue < 0) | |
580 | signvalue = '-'; | |
581 | else | |
582 | if (flags & DP_F_PLUS) /* Do a sign (+/i) */ | |
583 | signvalue = '+'; | |
584 | else | |
585 | if (flags & DP_F_SPACE) | |
586 | signvalue = ' '; | |
587 | ||
588 | #if 0 | |
589 | if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ | |
590 | #endif | |
591 | ||
2f098547 | 592 | intpart = (long)ufvalue; |
f8be5ef4 AT |
593 | |
594 | /* | |
595 | * Sorry, we only support 9 digits past the decimal because of our | |
596 | * conversion method | |
597 | */ | |
598 | if (max > 9) | |
599 | max = 9; | |
600 | ||
601 | /* We "cheat" by converting the fractional part to integer by | |
602 | * multiplying by a factor of 10 | |
603 | */ | |
604 | fracpart = round ((pow10 (max)) * (ufvalue - intpart)); | |
605 | ||
606 | if (fracpart >= pow10 (max)) | |
607 | { | |
608 | intpart++; | |
609 | fracpart -= pow10 (max); | |
610 | } | |
611 | ||
612 | #ifdef DEBUG_SNPRINTF | |
10600500 AT |
613 | printf("fmtfp: %g %d.%d min=%d max=%d\n", |
614 | (double)fvalue, intpart, fracpart, min, max); | |
f8be5ef4 AT |
615 | #endif |
616 | ||
617 | /* Convert integer part */ | |
618 | do { | |
619 | iconvert[iplace++] = | |
620 | (caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10]; | |
621 | intpart = (intpart / 10); | |
622 | } while(intpart && (iplace < 20)); | |
623 | if (iplace == 20) iplace--; | |
624 | iconvert[iplace] = 0; | |
625 | ||
626 | /* Convert fractional part */ | |
627 | do { | |
628 | fconvert[fplace++] = | |
629 | (caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10]; | |
630 | fracpart = (fracpart / 10); | |
631 | } while(fracpart && (fplace < 20)); | |
632 | if (fplace == 20) fplace--; | |
633 | fconvert[fplace] = 0; | |
634 | ||
635 | /* -1 for decimal point, another -1 if we are printing a sign */ | |
636 | padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); | |
637 | zpadlen = max - fplace; | |
638 | if (zpadlen < 0) | |
639 | zpadlen = 0; | |
640 | if (padlen < 0) | |
641 | padlen = 0; | |
642 | if (flags & DP_F_MINUS) | |
643 | padlen = -padlen; /* Left Justifty */ | |
644 | ||
645 | if ((flags & DP_F_ZERO) && (padlen > 0)) | |
646 | { | |
647 | if (signvalue) | |
648 | { | |
649 | dopr_outch (buffer, currlen, maxlen, signvalue); | |
650 | --padlen; | |
651 | signvalue = 0; | |
652 | } | |
653 | while (padlen > 0) | |
654 | { | |
655 | dopr_outch (buffer, currlen, maxlen, '0'); | |
656 | --padlen; | |
657 | } | |
658 | } | |
659 | while (padlen > 0) | |
660 | { | |
661 | dopr_outch (buffer, currlen, maxlen, ' '); | |
662 | --padlen; | |
663 | } | |
664 | if (signvalue) | |
665 | dopr_outch (buffer, currlen, maxlen, signvalue); | |
666 | ||
667 | while (iplace > 0) | |
668 | dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]); | |
669 | ||
10600500 AT |
670 | |
671 | #ifdef DEBUG_SNPRINTF | |
672 | printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen); | |
673 | #endif | |
674 | ||
f8be5ef4 AT |
675 | /* |
676 | * Decimal point. This should probably use locale to find the correct | |
677 | * char to print out. | |
678 | */ | |
10600500 AT |
679 | if (max > 0) { |
680 | dopr_outch (buffer, currlen, maxlen, '.'); | |
f8be5ef4 | 681 | |
10600500 AT |
682 | while (fplace > 0) |
683 | dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]); | |
684 | } | |
f8be5ef4 AT |
685 | |
686 | while (zpadlen > 0) | |
687 | { | |
688 | dopr_outch (buffer, currlen, maxlen, '0'); | |
689 | --zpadlen; | |
690 | } | |
691 | ||
692 | while (padlen < 0) | |
693 | { | |
694 | dopr_outch (buffer, currlen, maxlen, ' '); | |
695 | ++padlen; | |
696 | } | |
697 | } | |
698 | ||
699 | static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c) | |
700 | { | |
701 | if (*currlen < maxlen) | |
702 | buffer[(*currlen)++] = c; | |
703 | } | |
704 | #endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */ | |
705 | ||
706 | #ifndef HAVE_VSNPRINTF | |
2f098547 | 707 | int vsnprintf (char *str, size_t count, const char *fmt, va_list args) |
f8be5ef4 AT |
708 | { |
709 | str[0] = 0; | |
710 | dopr(str, count, fmt, args); | |
711 | return(strlen(str)); | |
712 | } | |
713 | #endif /* !HAVE_VSNPRINTF */ | |
714 | ||
715 | #ifndef HAVE_SNPRINTF | |
716 | /* VARARGS3 */ | |
717 | #ifdef HAVE_STDARGS | |
2f098547 | 718 | int snprintf (char *str,size_t count,const char *fmt,...) |
f8be5ef4 | 719 | #else |
2f098547 | 720 | int snprintf (va_alist) va_dcl |
f8be5ef4 AT |
721 | #endif |
722 | { | |
723 | #ifndef HAVE_STDARGS | |
724 | char *str; | |
725 | size_t count; | |
726 | char *fmt; | |
727 | #endif | |
728 | VA_LOCAL_DECL; | |
729 | ||
730 | VA_START (fmt); | |
731 | VA_SHIFT (str, char *); | |
732 | VA_SHIFT (count, size_t ); | |
733 | VA_SHIFT (fmt, char *); | |
734 | (void) vsnprintf(str, count, fmt, ap); | |
735 | VA_END; | |
736 | return(strlen(str)); | |
737 | } | |
738 | ||
10600500 AT |
739 | |
740 | #else | |
741 | /* keep compilers happy about empty files */ | |
742 | void dummy_snprintf(void) {} | |
743 | #endif /* !HAVE_SNPRINTF */ | |
744 | ||
f8be5ef4 AT |
745 | #ifdef TEST_SNPRINTF |
746 | #ifndef LONG_STRING | |
747 | #define LONG_STRING 1024 | |
748 | #endif | |
2f098547 | 749 | int main (void) |
f8be5ef4 AT |
750 | { |
751 | char buf1[LONG_STRING]; | |
752 | char buf2[LONG_STRING]; | |
753 | char *fp_fmt[] = { | |
754 | "%-1.5f", | |
755 | "%1.5f", | |
756 | "%123.9f", | |
757 | "%10.5f", | |
758 | "% 10.5f", | |
759 | "%+22.9f", | |
760 | "%+4.9f", | |
761 | "%01.3f", | |
762 | "%4f", | |
763 | "%3.1f", | |
764 | "%3.2f", | |
10600500 AT |
765 | "%.0f", |
766 | "%.1f", | |
f8be5ef4 AT |
767 | NULL |
768 | }; | |
769 | double fp_nums[] = { -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996, | |
770 | 0.9996, 1.996, 4.136, 0}; | |
771 | char *int_fmt[] = { | |
772 | "%-1.5d", | |
773 | "%1.5d", | |
774 | "%123.9d", | |
775 | "%5.5d", | |
776 | "%10.5d", | |
777 | "% 10.5d", | |
778 | "%+22.33d", | |
779 | "%01.3d", | |
780 | "%4d", | |
781 | NULL | |
782 | }; | |
783 | long int_nums[] = { -1, 134, 91340, 341, 0203, 0}; | |
784 | int x, y; | |
785 | int fail = 0; | |
786 | int num = 0; | |
787 | ||
788 | printf ("Testing snprintf format codes against system sprintf...\n"); | |
789 | ||
790 | for (x = 0; fp_fmt[x] != NULL ; x++) | |
791 | for (y = 0; fp_nums[y] != 0 ; y++) | |
792 | { | |
793 | snprintf (buf1, sizeof (buf1), fp_fmt[x], fp_nums[y]); | |
794 | sprintf (buf2, fp_fmt[x], fp_nums[y]); | |
795 | if (strcmp (buf1, buf2)) | |
796 | { | |
797 | printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n", | |
798 | fp_fmt[x], buf1, buf2); | |
799 | fail++; | |
800 | } | |
801 | num++; | |
802 | } | |
803 | ||
804 | for (x = 0; int_fmt[x] != NULL ; x++) | |
805 | for (y = 0; int_nums[y] != 0 ; y++) | |
806 | { | |
807 | snprintf (buf1, sizeof (buf1), int_fmt[x], int_nums[y]); | |
808 | sprintf (buf2, int_fmt[x], int_nums[y]); | |
809 | if (strcmp (buf1, buf2)) | |
810 | { | |
811 | printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n", | |
812 | int_fmt[x], buf1, buf2); | |
813 | fail++; | |
814 | } | |
815 | num++; | |
816 | } | |
817 | printf ("%d tests failed out of %d.\n", fail, num); | |
818 | } | |
819 | #endif /* SNPRINTF_TEST */ | |
820 |