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2d9a148e | 1 | /************************************************************** |
2 | * Original: | |
3 | * Patrick Powell Tue Apr 11 09:48:21 PDT 1995 | |
4 | * A bombproof version of doprnt (dopr) included. | |
5 | * Sigh. This sort of thing is always nasty do deal with. Note that | |
6 | * the version here does not include floating point... | |
dad3b556 | 7 | * |
2d9a148e | 8 | * snprintf() is used instead of sprintf() as it does limit checks |
9 | * for string length. This covers a nasty loophole. | |
dad3b556 | 10 | * |
2d9a148e | 11 | * The other functions are there to prevent NULL pointers from |
12 | * causing nast effects. | |
dad3b556 | 13 | * |
2d9a148e | 14 | * More Recently: |
15 | * Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43 | |
16 | * This was ugly. It is still ugly. I opted out of floating point | |
17 | * numbers, but the formatter understands just about everything | |
18 | * from the normal C string format, at least as far as I can tell from | |
19 | * the Solaris 2.5 printf(3S) man page. | |
20 | * | |
21 | * Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1 | |
22 | * Ok, added some minimal floating point support, which means this | |
23 | * probably requires libm on most operating systems. Don't yet | |
24 | * support the exponent (e,E) and sigfig (g,G). Also, fmtint() | |
25 | * was pretty badly broken, it just wasn't being exercised in ways | |
26 | * which showed it, so that's been fixed. Also, formated the code | |
27 | * to mutt conventions, and removed dead code left over from the | |
28 | * original. Also, there is now a builtin-test, just compile with: | |
29 | * gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm | |
30 | * and run snprintf for results. | |
31 | * | |
32 | * Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i | |
33 | * The PGP code was using unsigned hexadecimal formats. | |
34 | * Unfortunately, unsigned formats simply didn't work. | |
35 | * | |
36 | * Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8 | |
37 | * The original code assumed that both snprintf() and vsnprintf() were | |
38 | * missing. Some systems only have snprintf() but not vsnprintf(), so | |
39 | * the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF. | |
40 | * | |
41 | **************************************************************/ | |
dad3b556 | 42 | |
43 | #include "config.h" | |
44 | ||
2d9a148e | 45 | #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) |
dad3b556 | 46 | |
dad3b556 | 47 | #include <string.h> |
2d9a148e | 48 | # include <ctype.h> |
49 | #include <sys/types.h> | |
50 | ||
51 | /* Define this as a fall through, HAVE_STDARG_H is probably already set */ | |
52 | ||
53 | #define HAVE_VARARGS_H | |
54 | ||
55 | /* varargs declarations: */ | |
56 | ||
57 | #if defined(HAVE_STDARG_H) | |
58 | # include <stdarg.h> | |
59 | # define HAVE_STDARGS /* let's hope that works everywhere (mj) */ | |
60 | # define VA_LOCAL_DECL va_list ap | |
61 | # define VA_START(f) va_start(ap, f) | |
62 | # define VA_SHIFT(v,t) ; /* no-op for ANSI */ | |
63 | # define VA_END va_end(ap) | |
dad3b556 | 64 | #else |
2d9a148e | 65 | # if defined(HAVE_VARARGS_H) |
66 | # include <varargs.h> | |
67 | # undef HAVE_STDARGS | |
68 | # define VA_LOCAL_DECL va_list ap | |
69 | # define VA_START(f) va_start(ap) /* f is ignored! */ | |
70 | # define VA_SHIFT(v,t) v = va_arg(ap,t) | |
71 | # define VA_END va_end(ap) | |
72 | # else | |
73 | /*XX ** NO VARARGS ** XX*/ | |
74 | # endif | |
dad3b556 | 75 | #endif |
dad3b556 | 76 | |
2d9a148e | 77 | /*int snprintf (char *str, size_t count, const char *fmt, ...);*/ |
78 | /*int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);*/ | |
79 | ||
80 | static void dopr (char *buffer, size_t maxlen, const char *format, | |
81 | va_list args); | |
82 | static void fmtstr (char *buffer, size_t *currlen, size_t maxlen, | |
83 | char *value, int flags, int min, int max); | |
84 | static void fmtint (char *buffer, size_t *currlen, size_t maxlen, | |
85 | long value, int base, int min, int max, int flags); | |
86 | static void fmtfp (char *buffer, size_t *currlen, size_t maxlen, | |
87 | long double fvalue, int min, int max, int flags); | |
88 | static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c ); | |
89 | ||
90 | /* | |
91 | * dopr(): poor man's version of doprintf | |
92 | */ | |
93 | ||
94 | /* format read states */ | |
95 | #define DP_S_DEFAULT 0 | |
96 | #define DP_S_FLAGS 1 | |
97 | #define DP_S_MIN 2 | |
98 | #define DP_S_DOT 3 | |
99 | #define DP_S_MAX 4 | |
100 | #define DP_S_MOD 5 | |
101 | #define DP_S_CONV 6 | |
102 | #define DP_S_DONE 7 | |
103 | ||
104 | /* format flags - Bits */ | |
105 | #define DP_F_MINUS (1 << 0) | |
106 | #define DP_F_PLUS (1 << 1) | |
107 | #define DP_F_SPACE (1 << 2) | |
108 | #define DP_F_NUM (1 << 3) | |
109 | #define DP_F_ZERO (1 << 4) | |
110 | #define DP_F_UP (1 << 5) | |
111 | #define DP_F_UNSIGNED (1 << 6) | |
112 | ||
113 | /* Conversion Flags */ | |
114 | #define DP_C_SHORT 1 | |
115 | #define DP_C_LONG 2 | |
116 | #define DP_C_LDOUBLE 3 | |
117 | ||
118 | #define char_to_int(p) (p - '0') | |
0b65b628 | 119 | #ifndef MAX |
120 | # define MAX(p,q) ((p >= q) ? p : q) | |
121 | #endif | |
2d9a148e | 122 | |
123 | static void dopr (char *buffer, size_t maxlen, const char *format, va_list args) | |
124 | { | |
125 | char ch; | |
126 | long value; | |
127 | long double fvalue; | |
128 | char *strvalue; | |
129 | int min; | |
130 | int max; | |
131 | int state; | |
132 | int flags; | |
133 | int cflags; | |
134 | size_t currlen; | |
135 | ||
136 | state = DP_S_DEFAULT; | |
137 | currlen = flags = cflags = min = 0; | |
138 | max = -1; | |
139 | ch = *format++; | |
140 | ||
141 | while (state != DP_S_DONE) | |
142 | { | |
143 | if ((ch == '\0') || (currlen >= maxlen)) | |
144 | state = DP_S_DONE; | |
145 | ||
146 | switch(state) | |
147 | { | |
148 | case DP_S_DEFAULT: | |
149 | if (ch == '%') | |
150 | state = DP_S_FLAGS; | |
151 | else | |
152 | dopr_outch (buffer, &currlen, maxlen, ch); | |
153 | ch = *format++; | |
154 | break; | |
155 | case DP_S_FLAGS: | |
156 | switch (ch) | |
157 | { | |
158 | case '-': | |
159 | flags |= DP_F_MINUS; | |
160 | ch = *format++; | |
161 | break; | |
162 | case '+': | |
163 | flags |= DP_F_PLUS; | |
164 | ch = *format++; | |
165 | break; | |
166 | case ' ': | |
167 | flags |= DP_F_SPACE; | |
168 | ch = *format++; | |
169 | break; | |
170 | case '#': | |
171 | flags |= DP_F_NUM; | |
172 | ch = *format++; | |
173 | break; | |
174 | case '0': | |
175 | flags |= DP_F_ZERO; | |
176 | ch = *format++; | |
177 | break; | |
178 | default: | |
179 | state = DP_S_MIN; | |
180 | break; | |
181 | } | |
182 | break; | |
183 | case DP_S_MIN: | |
184 | if (isdigit((unsigned char)ch)) | |
185 | { | |
186 | min = 10*min + char_to_int (ch); | |
187 | ch = *format++; | |
188 | } | |
189 | else if (ch == '*') | |
190 | { | |
191 | min = va_arg (args, int); | |
192 | ch = *format++; | |
193 | state = DP_S_DOT; | |
194 | } | |
195 | else | |
196 | state = DP_S_DOT; | |
197 | break; | |
198 | case DP_S_DOT: | |
199 | if (ch == '.') | |
200 | { | |
201 | state = DP_S_MAX; | |
202 | ch = *format++; | |
203 | } | |
204 | else | |
205 | state = DP_S_MOD; | |
206 | break; | |
207 | case DP_S_MAX: | |
208 | if (isdigit((unsigned char)ch)) | |
209 | { | |
210 | if (max < 0) | |
211 | max = 0; | |
212 | max = 10*max + char_to_int (ch); | |
213 | ch = *format++; | |
214 | } | |
215 | else if (ch == '*') | |
216 | { | |
217 | max = va_arg (args, int); | |
218 | ch = *format++; | |
219 | state = DP_S_MOD; | |
220 | } | |
221 | else | |
222 | state = DP_S_MOD; | |
223 | break; | |
224 | case DP_S_MOD: | |
225 | /* Currently, we don't support Long Long, bummer */ | |
226 | switch (ch) | |
227 | { | |
228 | case 'h': | |
229 | cflags = DP_C_SHORT; | |
230 | ch = *format++; | |
231 | break; | |
232 | case 'l': | |
233 | cflags = DP_C_LONG; | |
234 | ch = *format++; | |
235 | break; | |
236 | case 'L': | |
237 | cflags = DP_C_LDOUBLE; | |
238 | ch = *format++; | |
239 | break; | |
240 | default: | |
241 | break; | |
242 | } | |
243 | state = DP_S_CONV; | |
244 | break; | |
245 | case DP_S_CONV: | |
246 | switch (ch) | |
247 | { | |
248 | case 'd': | |
249 | case 'i': | |
250 | if (cflags == DP_C_SHORT) | |
251 | value = va_arg (args, short int); | |
252 | else if (cflags == DP_C_LONG) | |
253 | value = va_arg (args, long int); | |
254 | else | |
255 | value = va_arg (args, int); | |
256 | fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); | |
257 | break; | |
258 | case 'o': | |
259 | flags |= DP_F_UNSIGNED; | |
260 | if (cflags == DP_C_SHORT) | |
261 | value = va_arg (args, unsigned short int); | |
262 | else if (cflags == DP_C_LONG) | |
263 | value = va_arg (args, unsigned long int); | |
264 | else | |
265 | value = va_arg (args, unsigned int); | |
266 | fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags); | |
267 | break; | |
268 | case 'u': | |
269 | flags |= DP_F_UNSIGNED; | |
270 | if (cflags == DP_C_SHORT) | |
271 | value = va_arg (args, unsigned short int); | |
272 | else if (cflags == DP_C_LONG) | |
273 | value = va_arg (args, unsigned long int); | |
274 | else | |
275 | value = va_arg (args, unsigned int); | |
276 | fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); | |
277 | break; | |
278 | case 'X': | |
279 | flags |= DP_F_UP; | |
280 | case 'x': | |
281 | flags |= DP_F_UNSIGNED; | |
282 | if (cflags == DP_C_SHORT) | |
283 | value = va_arg (args, unsigned short int); | |
284 | else if (cflags == DP_C_LONG) | |
285 | value = va_arg (args, unsigned long int); | |
286 | else | |
287 | value = va_arg (args, unsigned int); | |
288 | fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags); | |
289 | break; | |
290 | case 'f': | |
291 | if (cflags == DP_C_LDOUBLE) | |
292 | fvalue = va_arg (args, long double); | |
293 | else | |
294 | fvalue = va_arg (args, double); | |
295 | /* um, floating point? */ | |
296 | fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); | |
297 | break; | |
298 | case 'E': | |
299 | flags |= DP_F_UP; | |
300 | case 'e': | |
301 | if (cflags == DP_C_LDOUBLE) | |
302 | fvalue = va_arg (args, long double); | |
303 | else | |
304 | fvalue = va_arg (args, double); | |
305 | break; | |
306 | case 'G': | |
307 | flags |= DP_F_UP; | |
308 | case 'g': | |
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 'c': | |
315 | dopr_outch (buffer, &currlen, maxlen, va_arg (args, int)); | |
316 | break; | |
317 | case 's': | |
318 | strvalue = va_arg (args, char *); | |
319 | if (max < 0) | |
320 | max = maxlen; /* ie, no max */ | |
321 | fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max); | |
322 | break; | |
323 | case 'p': | |
324 | strvalue = va_arg (args, void *); | |
325 | fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags); | |
326 | break; | |
327 | case 'n': | |
328 | if (cflags == DP_C_SHORT) | |
329 | { | |
330 | short int *num; | |
331 | num = va_arg (args, short int *); | |
332 | *num = currlen; | |
333 | } | |
334 | else if (cflags == DP_C_LONG) | |
335 | { | |
336 | long int *num; | |
337 | num = va_arg (args, long int *); | |
338 | *num = currlen; | |
339 | } | |
340 | else | |
341 | { | |
342 | int *num; | |
343 | num = va_arg (args, int *); | |
344 | *num = currlen; | |
345 | } | |
346 | break; | |
347 | case '%': | |
348 | dopr_outch (buffer, &currlen, maxlen, ch); | |
349 | break; | |
350 | case 'w': | |
351 | /* not supported yet, treat as next char */ | |
352 | ch = *format++; | |
353 | break; | |
354 | default: | |
355 | /* Unknown, skip */ | |
356 | break; | |
357 | } | |
358 | ch = *format++; | |
359 | state = DP_S_DEFAULT; | |
360 | flags = cflags = min = 0; | |
361 | max = -1; | |
362 | break; | |
363 | case DP_S_DONE: | |
364 | break; | |
365 | default: | |
366 | /* hmm? */ | |
367 | break; /* some picky compilers need this */ | |
368 | } | |
369 | } | |
370 | if (currlen < maxlen - 1) | |
371 | buffer[currlen] = '\0'; | |
372 | else | |
373 | buffer[maxlen - 1] = '\0'; | |
374 | } | |
375 | ||
376 | static void fmtstr (char *buffer, size_t *currlen, size_t maxlen, | |
377 | char *value, int flags, int min, int max) | |
378 | { | |
379 | int padlen, strln; /* amount to pad */ | |
380 | int cnt = 0; | |
381 | ||
382 | if (value == 0) | |
383 | { | |
384 | value = "<NULL>"; | |
385 | } | |
386 | ||
387 | for (strln = 0; value[strln]; ++strln); /* strlen */ | |
388 | padlen = min - strln; | |
389 | if (padlen < 0) | |
390 | padlen = 0; | |
391 | if (flags & DP_F_MINUS) | |
392 | padlen = -padlen; /* Left Justify */ | |
393 | ||
394 | while ((padlen > 0) && (cnt < max)) | |
395 | { | |
396 | dopr_outch (buffer, currlen, maxlen, ' '); | |
397 | --padlen; | |
398 | ++cnt; | |
399 | } | |
400 | while (*value && (cnt < max)) | |
401 | { | |
402 | dopr_outch (buffer, currlen, maxlen, *value++); | |
403 | ++cnt; | |
404 | } | |
405 | while ((padlen < 0) && (cnt < max)) | |
406 | { | |
407 | dopr_outch (buffer, currlen, maxlen, ' '); | |
408 | ++padlen; | |
409 | ++cnt; | |
410 | } | |
411 | } | |
412 | ||
413 | /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */ | |
414 | ||
415 | static void fmtint (char *buffer, size_t *currlen, size_t maxlen, | |
416 | long value, int base, int min, int max, int flags) | |
417 | { | |
418 | int signvalue = 0; | |
419 | unsigned long uvalue; | |
420 | char convert[20]; | |
421 | int place = 0; | |
422 | int spadlen = 0; /* amount to space pad */ | |
423 | int zpadlen = 0; /* amount to zero pad */ | |
424 | int caps = 0; | |
425 | ||
426 | if (max < 0) | |
427 | max = 0; | |
428 | ||
429 | uvalue = value; | |
430 | ||
431 | if(!(flags & DP_F_UNSIGNED)) | |
432 | { | |
433 | if( value < 0 ) { | |
434 | signvalue = '-'; | |
435 | uvalue = -value; | |
436 | } | |
437 | else | |
438 | if (flags & DP_F_PLUS) /* Do a sign (+/i) */ | |
439 | signvalue = '+'; | |
440 | else | |
441 | if (flags & DP_F_SPACE) | |
442 | signvalue = ' '; | |
443 | } | |
444 | ||
445 | if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ | |
446 | ||
447 | do { | |
448 | convert[place++] = | |
449 | (caps? "0123456789ABCDEF":"0123456789abcdef") | |
450 | [uvalue % (unsigned)base ]; | |
451 | uvalue = (uvalue / (unsigned)base ); | |
452 | } while(uvalue && (place < 20)); | |
453 | if (place == 20) place--; | |
454 | convert[place] = 0; | |
455 | ||
456 | zpadlen = max - place; | |
457 | spadlen = min - MAX (max, place) - (signvalue ? 1 : 0); | |
458 | if (zpadlen < 0) zpadlen = 0; | |
459 | if (spadlen < 0) spadlen = 0; | |
460 | if (flags & DP_F_ZERO) | |
461 | { | |
462 | zpadlen = MAX(zpadlen, spadlen); | |
463 | spadlen = 0; | |
464 | } | |
465 | if (flags & DP_F_MINUS) | |
466 | spadlen = -spadlen; /* Left Justifty */ | |
467 | ||
468 | #ifdef DEBUG_SNPRINTF | |
469 | dprint (1, (debugfile, "zpad: %d, spad: %d, min: %d, max: %d, place: %d\n", | |
470 | zpadlen, spadlen, min, max, place)); | |
dad3b556 | 471 | #endif |
472 | ||
2d9a148e | 473 | /* Spaces */ |
474 | while (spadlen > 0) | |
475 | { | |
476 | dopr_outch (buffer, currlen, maxlen, ' '); | |
477 | --spadlen; | |
478 | } | |
dad3b556 | 479 | |
2d9a148e | 480 | /* Sign */ |
481 | if (signvalue) | |
482 | dopr_outch (buffer, currlen, maxlen, signvalue); | |
dad3b556 | 483 | |
2d9a148e | 484 | /* Zeros */ |
485 | if (zpadlen > 0) | |
486 | { | |
487 | while (zpadlen > 0) | |
488 | { | |
489 | dopr_outch (buffer, currlen, maxlen, '0'); | |
490 | --zpadlen; | |
491 | } | |
492 | } | |
493 | ||
494 | /* Digits */ | |
495 | while (place > 0) | |
496 | dopr_outch (buffer, currlen, maxlen, convert[--place]); | |
497 | ||
498 | /* Left Justified spaces */ | |
499 | while (spadlen < 0) { | |
500 | dopr_outch (buffer, currlen, maxlen, ' '); | |
501 | ++spadlen; | |
502 | } | |
503 | } | |
504 | ||
505 | static long double abs_val (long double value) | |
b6019d68 | 506 | { |
2d9a148e | 507 | long double result = value; |
508 | ||
509 | if (value < 0) | |
510 | result = -value; | |
511 | ||
512 | return result; | |
b6019d68 | 513 | } |
b6019d68 | 514 | |
2d9a148e | 515 | static long double pow10 (int exp) |
dad3b556 | 516 | { |
2d9a148e | 517 | long double result = 1; |
518 | ||
519 | while (exp) | |
520 | { | |
521 | result *= 10; | |
522 | exp--; | |
523 | } | |
524 | ||
525 | return result; | |
dad3b556 | 526 | } |
527 | ||
2d9a148e | 528 | static long round (long double value) |
dad3b556 | 529 | { |
2d9a148e | 530 | long intpart; |
531 | ||
532 | intpart = value; | |
533 | value = value - intpart; | |
534 | if (value >= 0.5) | |
535 | intpart++; | |
536 | ||
537 | return intpart; | |
dad3b556 | 538 | } |
539 | ||
2d9a148e | 540 | static void fmtfp (char *buffer, size_t *currlen, size_t maxlen, |
541 | long double fvalue, int min, int max, int flags) | |
dad3b556 | 542 | { |
2d9a148e | 543 | int signvalue = 0; |
544 | long double ufvalue; | |
545 | char iconvert[20]; | |
546 | char fconvert[20]; | |
547 | int iplace = 0; | |
548 | int fplace = 0; | |
549 | int padlen = 0; /* amount to pad */ | |
550 | int zpadlen = 0; | |
551 | int caps = 0; | |
552 | long intpart; | |
553 | long fracpart; | |
554 | ||
555 | /* | |
556 | * AIX manpage says the default is 0, but Solaris says the default | |
557 | * is 6, and sprintf on AIX defaults to 6 | |
558 | */ | |
559 | if (max < 0) | |
560 | max = 6; | |
561 | ||
562 | ufvalue = abs_val (fvalue); | |
563 | ||
564 | if (fvalue < 0) | |
565 | signvalue = '-'; | |
566 | else | |
567 | if (flags & DP_F_PLUS) /* Do a sign (+/i) */ | |
568 | signvalue = '+'; | |
569 | else | |
570 | if (flags & DP_F_SPACE) | |
571 | signvalue = ' '; | |
572 | ||
573 | #if 0 | |
574 | if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ | |
575 | #endif | |
576 | ||
577 | intpart = ufvalue; | |
578 | ||
579 | /* | |
580 | * Sorry, we only support 9 digits past the decimal because of our | |
581 | * conversion method | |
582 | */ | |
583 | if (max > 9) | |
584 | max = 9; | |
585 | ||
586 | /* We "cheat" by converting the fractional part to integer by | |
587 | * multiplying by a factor of 10 | |
588 | */ | |
589 | fracpart = round ((pow10 (max)) * (ufvalue - intpart)); | |
590 | ||
591 | if (fracpart >= pow10 (max)) | |
592 | { | |
593 | intpart++; | |
594 | fracpart -= pow10 (max); | |
595 | } | |
596 | ||
597 | #ifdef DEBUG_SNPRINTF | |
598 | dprint (1, (debugfile, "fmtfp: %f =? %d.%d\n", fvalue, intpart, fracpart)); | |
599 | #endif | |
600 | ||
601 | /* Convert integer part */ | |
602 | do { | |
603 | iconvert[iplace++] = | |
604 | (caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10]; | |
605 | intpart = (intpart / 10); | |
606 | } while(intpart && (iplace < 20)); | |
607 | if (iplace == 20) iplace--; | |
608 | iconvert[iplace] = 0; | |
609 | ||
610 | /* Convert fractional part */ | |
611 | do { | |
612 | fconvert[fplace++] = | |
613 | (caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10]; | |
614 | fracpart = (fracpart / 10); | |
615 | } while(fracpart && (fplace < 20)); | |
616 | if (fplace == 20) fplace--; | |
617 | fconvert[fplace] = 0; | |
618 | ||
619 | /* -1 for decimal point, another -1 if we are printing a sign */ | |
620 | padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); | |
621 | zpadlen = max - fplace; | |
622 | if (zpadlen < 0) | |
623 | zpadlen = 0; | |
624 | if (padlen < 0) | |
625 | padlen = 0; | |
626 | if (flags & DP_F_MINUS) | |
627 | padlen = -padlen; /* Left Justifty */ | |
628 | ||
629 | if ((flags & DP_F_ZERO) && (padlen > 0)) | |
630 | { | |
631 | if (signvalue) | |
632 | { | |
633 | dopr_outch (buffer, currlen, maxlen, signvalue); | |
634 | --padlen; | |
635 | signvalue = 0; | |
636 | } | |
637 | while (padlen > 0) | |
638 | { | |
639 | dopr_outch (buffer, currlen, maxlen, '0'); | |
640 | --padlen; | |
641 | } | |
642 | } | |
643 | while (padlen > 0) | |
644 | { | |
645 | dopr_outch (buffer, currlen, maxlen, ' '); | |
646 | --padlen; | |
647 | } | |
648 | if (signvalue) | |
649 | dopr_outch (buffer, currlen, maxlen, signvalue); | |
650 | ||
651 | while (iplace > 0) | |
652 | dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]); | |
653 | ||
654 | /* | |
655 | * Decimal point. This should probably use locale to find the correct | |
656 | * char to print out. | |
657 | */ | |
658 | dopr_outch (buffer, currlen, maxlen, '.'); | |
659 | ||
660 | while (fplace > 0) | |
661 | dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]); | |
662 | ||
663 | while (zpadlen > 0) | |
664 | { | |
665 | dopr_outch (buffer, currlen, maxlen, '0'); | |
666 | --zpadlen; | |
667 | } | |
668 | ||
669 | while (padlen < 0) | |
670 | { | |
671 | dopr_outch (buffer, currlen, maxlen, ' '); | |
672 | ++padlen; | |
673 | } | |
674 | } | |
675 | ||
676 | static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c) | |
677 | { | |
678 | if (*currlen < maxlen) | |
679 | buffer[(*currlen)++] = c; | |
dad3b556 | 680 | } |
2d9a148e | 681 | #endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */ |
dad3b556 | 682 | |
2d9a148e | 683 | #ifndef HAVE_VSNPRINTF |
684 | int vsnprintf (char *str, size_t count, const char *fmt, va_list args) | |
dad3b556 | 685 | { |
2d9a148e | 686 | str[0] = 0; |
687 | dopr(str, count, fmt, args); | |
688 | return(strlen(str)); | |
dad3b556 | 689 | } |
2d9a148e | 690 | #endif /* !HAVE_VSNPRINTF */ |
dad3b556 | 691 | |
2d9a148e | 692 | #ifndef HAVE_SNPRINTF |
693 | /* VARARGS3 */ | |
694 | #ifdef HAVE_STDARGS | |
695 | int snprintf (char *str,size_t count,const char *fmt,...) | |
847e8865 | 696 | #else |
2d9a148e | 697 | int snprintf (va_alist) va_dcl |
847e8865 | 698 | #endif |
699 | { | |
2d9a148e | 700 | #ifndef HAVE_STDARGS |
701 | char *str; | |
702 | size_t count; | |
703 | char *fmt; | |
847e8865 | 704 | #endif |
2d9a148e | 705 | VA_LOCAL_DECL; |
706 | ||
707 | VA_START (fmt); | |
708 | VA_SHIFT (str, char *); | |
709 | VA_SHIFT (count, size_t ); | |
710 | VA_SHIFT (fmt, char *); | |
711 | (void) vsnprintf(str, count, fmt, ap); | |
712 | VA_END; | |
713 | return(strlen(str)); | |
714 | } | |
715 | ||
716 | #ifdef TEST_SNPRINTF | |
717 | #ifndef LONG_STRING | |
718 | #define LONG_STRING 1024 | |
719 | #endif | |
720 | int main (void) | |
721 | { | |
722 | char buf1[LONG_STRING]; | |
723 | char buf2[LONG_STRING]; | |
724 | char *fp_fmt[] = { | |
725 | "%-1.5f", | |
726 | "%1.5f", | |
727 | "%123.9f", | |
728 | "%10.5f", | |
729 | "% 10.5f", | |
730 | "%+22.9f", | |
731 | "%+4.9f", | |
732 | "%01.3f", | |
733 | "%4f", | |
734 | "%3.1f", | |
735 | "%3.2f", | |
736 | NULL | |
737 | }; | |
738 | double fp_nums[] = { -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996, | |
739 | 0.9996, 1.996, 4.136, 0}; | |
740 | char *int_fmt[] = { | |
741 | "%-1.5d", | |
742 | "%1.5d", | |
743 | "%123.9d", | |
744 | "%5.5d", | |
745 | "%10.5d", | |
746 | "% 10.5d", | |
747 | "%+22.33d", | |
748 | "%01.3d", | |
749 | "%4d", | |
750 | NULL | |
751 | }; | |
752 | long int_nums[] = { -1, 134, 91340, 341, 0203, 0}; | |
753 | int x, y; | |
754 | int fail = 0; | |
755 | int num = 0; | |
756 | ||
757 | printf ("Testing snprintf format codes against system sprintf...\n"); | |
758 | ||
759 | for (x = 0; fp_fmt[x] != NULL ; x++) | |
760 | for (y = 0; fp_nums[y] != 0 ; y++) | |
761 | { | |
762 | snprintf (buf1, sizeof (buf1), fp_fmt[x], fp_nums[y]); | |
763 | sprintf (buf2, fp_fmt[x], fp_nums[y]); | |
764 | if (strcmp (buf1, buf2)) | |
765 | { | |
766 | printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n", | |
767 | fp_fmt[x], buf1, buf2); | |
768 | fail++; | |
769 | } | |
770 | num++; | |
771 | } | |
847e8865 | 772 | |
2d9a148e | 773 | for (x = 0; int_fmt[x] != NULL ; x++) |
774 | for (y = 0; int_nums[y] != 0 ; y++) | |
775 | { | |
776 | snprintf (buf1, sizeof (buf1), int_fmt[x], int_nums[y]); | |
777 | sprintf (buf2, int_fmt[x], int_nums[y]); | |
778 | if (strcmp (buf1, buf2)) | |
779 | { | |
780 | printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n", | |
781 | int_fmt[x], buf1, buf2); | |
782 | fail++; | |
783 | } | |
784 | num++; | |
785 | } | |
786 | printf ("%d tests failed out of %d.\n", fail, num); | |
847e8865 | 787 | } |
2d9a148e | 788 | #endif /* SNPRINTF_TEST */ |
847e8865 | 789 | |
2d9a148e | 790 | #endif /* !HAVE_SNPRINTF */ |