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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 | * | |
c73b8e3a | 41 | * Ben Lindstrom <mouring@pconline.com> 09/27/00 for OpenSSH |
42 | * Welcome to the world of %lld and %qd support. With other | |
43 | * long long support. This is needed for sftp-server to work | |
44 | * right. | |
2d9a148e | 45 | **************************************************************/ |
dad3b556 | 46 | |
47 | #include "config.h" | |
48 | ||
2d9a148e | 49 | #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) |
dad3b556 | 50 | |
dad3b556 | 51 | #include <string.h> |
2d9a148e | 52 | # include <ctype.h> |
53 | #include <sys/types.h> | |
54 | ||
55 | /* Define this as a fall through, HAVE_STDARG_H is probably already set */ | |
56 | ||
57 | #define HAVE_VARARGS_H | |
58 | ||
59 | /* varargs declarations: */ | |
60 | ||
61 | #if defined(HAVE_STDARG_H) | |
62 | # include <stdarg.h> | |
63 | # define HAVE_STDARGS /* let's hope that works everywhere (mj) */ | |
64 | # define VA_LOCAL_DECL va_list ap | |
65 | # define VA_START(f) va_start(ap, f) | |
66 | # define VA_SHIFT(v,t) ; /* no-op for ANSI */ | |
67 | # define VA_END va_end(ap) | |
dad3b556 | 68 | #else |
2d9a148e | 69 | # if defined(HAVE_VARARGS_H) |
70 | # include <varargs.h> | |
71 | # undef HAVE_STDARGS | |
72 | # define VA_LOCAL_DECL va_list ap | |
73 | # define VA_START(f) va_start(ap) /* f is ignored! */ | |
74 | # define VA_SHIFT(v,t) v = va_arg(ap,t) | |
75 | # define VA_END va_end(ap) | |
76 | # else | |
77 | /*XX ** NO VARARGS ** XX*/ | |
78 | # endif | |
dad3b556 | 79 | #endif |
dad3b556 | 80 | |
2d9a148e | 81 | /*int snprintf (char *str, size_t count, const char *fmt, ...);*/ |
82 | /*int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);*/ | |
83 | ||
84 | static void dopr (char *buffer, size_t maxlen, const char *format, | |
85 | va_list args); | |
86 | static void fmtstr (char *buffer, size_t *currlen, size_t maxlen, | |
87 | char *value, int flags, int min, int max); | |
88 | static void fmtint (char *buffer, size_t *currlen, size_t maxlen, | |
89 | long value, int base, int min, int max, int flags); | |
90 | static void fmtfp (char *buffer, size_t *currlen, size_t maxlen, | |
91 | long double fvalue, int min, int max, int flags); | |
92 | static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c ); | |
93 | ||
94 | /* | |
95 | * dopr(): poor man's version of doprintf | |
96 | */ | |
97 | ||
98 | /* format read states */ | |
99 | #define DP_S_DEFAULT 0 | |
100 | #define DP_S_FLAGS 1 | |
101 | #define DP_S_MIN 2 | |
102 | #define DP_S_DOT 3 | |
103 | #define DP_S_MAX 4 | |
104 | #define DP_S_MOD 5 | |
105 | #define DP_S_CONV 6 | |
106 | #define DP_S_DONE 7 | |
107 | ||
108 | /* format flags - Bits */ | |
109 | #define DP_F_MINUS (1 << 0) | |
110 | #define DP_F_PLUS (1 << 1) | |
111 | #define DP_F_SPACE (1 << 2) | |
112 | #define DP_F_NUM (1 << 3) | |
113 | #define DP_F_ZERO (1 << 4) | |
114 | #define DP_F_UP (1 << 5) | |
115 | #define DP_F_UNSIGNED (1 << 6) | |
116 | ||
117 | /* Conversion Flags */ | |
c73b8e3a | 118 | #define DP_C_SHORT 1 |
119 | #define DP_C_LONG 2 | |
120 | #define DP_C_LDOUBLE 3 | |
121 | #define DP_C_LONG_LONG 4 | |
2d9a148e | 122 | |
123 | #define char_to_int(p) (p - '0') | |
0b65b628 | 124 | #ifndef MAX |
125 | # define MAX(p,q) ((p >= q) ? p : q) | |
126 | #endif | |
2d9a148e | 127 | |
128 | static void dopr (char *buffer, size_t maxlen, const char *format, va_list args) | |
129 | { | |
130 | char ch; | |
131 | long value; | |
132 | long double fvalue; | |
133 | char *strvalue; | |
134 | int min; | |
135 | int max; | |
136 | int state; | |
137 | int flags; | |
138 | int cflags; | |
139 | size_t currlen; | |
140 | ||
141 | state = DP_S_DEFAULT; | |
142 | currlen = flags = cflags = min = 0; | |
143 | max = -1; | |
144 | ch = *format++; | |
145 | ||
146 | while (state != DP_S_DONE) | |
147 | { | |
148 | if ((ch == '\0') || (currlen >= maxlen)) | |
149 | state = DP_S_DONE; | |
150 | ||
151 | switch(state) | |
152 | { | |
153 | case DP_S_DEFAULT: | |
154 | if (ch == '%') | |
155 | state = DP_S_FLAGS; | |
156 | else | |
157 | dopr_outch (buffer, &currlen, maxlen, ch); | |
158 | ch = *format++; | |
159 | break; | |
160 | case DP_S_FLAGS: | |
161 | switch (ch) | |
162 | { | |
163 | case '-': | |
164 | flags |= DP_F_MINUS; | |
165 | ch = *format++; | |
166 | break; | |
167 | case '+': | |
168 | flags |= DP_F_PLUS; | |
169 | ch = *format++; | |
170 | break; | |
171 | case ' ': | |
172 | flags |= DP_F_SPACE; | |
173 | ch = *format++; | |
174 | break; | |
175 | case '#': | |
176 | flags |= DP_F_NUM; | |
177 | ch = *format++; | |
178 | break; | |
179 | case '0': | |
180 | flags |= DP_F_ZERO; | |
181 | ch = *format++; | |
182 | break; | |
183 | default: | |
184 | state = DP_S_MIN; | |
185 | break; | |
186 | } | |
187 | break; | |
188 | case DP_S_MIN: | |
189 | if (isdigit((unsigned char)ch)) | |
190 | { | |
191 | min = 10*min + char_to_int (ch); | |
192 | ch = *format++; | |
193 | } | |
194 | else if (ch == '*') | |
195 | { | |
196 | min = va_arg (args, int); | |
197 | ch = *format++; | |
198 | state = DP_S_DOT; | |
199 | } | |
200 | else | |
201 | state = DP_S_DOT; | |
202 | break; | |
203 | case DP_S_DOT: | |
204 | if (ch == '.') | |
205 | { | |
206 | state = DP_S_MAX; | |
207 | ch = *format++; | |
208 | } | |
209 | else | |
210 | state = DP_S_MOD; | |
211 | break; | |
212 | case DP_S_MAX: | |
213 | if (isdigit((unsigned char)ch)) | |
214 | { | |
215 | if (max < 0) | |
216 | max = 0; | |
217 | max = 10*max + char_to_int (ch); | |
218 | ch = *format++; | |
219 | } | |
220 | else if (ch == '*') | |
221 | { | |
222 | max = va_arg (args, int); | |
223 | ch = *format++; | |
224 | state = DP_S_MOD; | |
225 | } | |
226 | else | |
227 | state = DP_S_MOD; | |
228 | break; | |
229 | case DP_S_MOD: | |
2d9a148e | 230 | switch (ch) |
231 | { | |
232 | case 'h': | |
233 | cflags = DP_C_SHORT; | |
234 | ch = *format++; | |
235 | break; | |
236 | case 'l': | |
237 | cflags = DP_C_LONG; | |
238 | ch = *format++; | |
c73b8e3a | 239 | if (ch == 'l') { |
240 | cflags = DP_C_LONG_LONG; | |
241 | ch = *format++; | |
242 | } | |
2d9a148e | 243 | break; |
c73b8e3a | 244 | case 'q': |
245 | cflags = DP_C_LONG_LONG; | |
246 | ch = *format++; | |
247 | break; | |
2d9a148e | 248 | case 'L': |
249 | cflags = DP_C_LDOUBLE; | |
250 | ch = *format++; | |
251 | break; | |
252 | default: | |
253 | break; | |
254 | } | |
255 | state = DP_S_CONV; | |
256 | break; | |
257 | case DP_S_CONV: | |
258 | switch (ch) | |
259 | { | |
260 | case 'd': | |
261 | case 'i': | |
262 | if (cflags == DP_C_SHORT) | |
027bf205 | 263 | value = va_arg (args, int); |
2d9a148e | 264 | else if (cflags == DP_C_LONG) |
265 | value = va_arg (args, long int); | |
c73b8e3a | 266 | else if (cflags == DP_C_LONG_LONG) |
267 | value = va_arg (args, long long); | |
2d9a148e | 268 | else |
269 | value = va_arg (args, int); | |
270 | fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); | |
271 | break; | |
272 | case 'o': | |
273 | flags |= DP_F_UNSIGNED; | |
274 | if (cflags == DP_C_SHORT) | |
027bf205 | 275 | value = va_arg (args, unsigned int); |
2d9a148e | 276 | else if (cflags == DP_C_LONG) |
277 | value = va_arg (args, unsigned long int); | |
c73b8e3a | 278 | else if (cflags == DP_C_LONG_LONG) |
279 | value = va_arg (args, unsigned long long); | |
2d9a148e | 280 | else |
281 | value = va_arg (args, unsigned int); | |
282 | fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags); | |
283 | break; | |
284 | case 'u': | |
285 | flags |= DP_F_UNSIGNED; | |
286 | if (cflags == DP_C_SHORT) | |
027bf205 | 287 | value = va_arg (args, unsigned int); |
2d9a148e | 288 | else if (cflags == DP_C_LONG) |
289 | value = va_arg (args, unsigned long int); | |
c73b8e3a | 290 | else if (cflags == DP_C_LONG_LONG) |
291 | value = va_arg (args, unsigned long long); | |
2d9a148e | 292 | else |
293 | value = va_arg (args, unsigned int); | |
294 | fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); | |
295 | break; | |
296 | case 'X': | |
297 | flags |= DP_F_UP; | |
298 | case 'x': | |
299 | flags |= DP_F_UNSIGNED; | |
300 | if (cflags == DP_C_SHORT) | |
027bf205 | 301 | value = va_arg (args, unsigned int); |
2d9a148e | 302 | else if (cflags == DP_C_LONG) |
303 | value = va_arg (args, unsigned long int); | |
c73b8e3a | 304 | else if (cflags == DP_C_LONG_LONG) |
305 | value = va_arg (args, unsigned long long); | |
2d9a148e | 306 | else |
307 | value = va_arg (args, unsigned int); | |
308 | fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags); | |
309 | break; | |
310 | case 'f': | |
311 | if (cflags == DP_C_LDOUBLE) | |
312 | fvalue = va_arg (args, long double); | |
313 | else | |
314 | fvalue = va_arg (args, double); | |
315 | /* um, floating point? */ | |
316 | fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); | |
317 | break; | |
318 | case 'E': | |
319 | flags |= DP_F_UP; | |
320 | case 'e': | |
321 | if (cflags == DP_C_LDOUBLE) | |
322 | fvalue = va_arg (args, long double); | |
323 | else | |
324 | fvalue = va_arg (args, double); | |
325 | break; | |
326 | case 'G': | |
327 | flags |= DP_F_UP; | |
328 | case 'g': | |
329 | if (cflags == DP_C_LDOUBLE) | |
330 | fvalue = va_arg (args, long double); | |
331 | else | |
332 | fvalue = va_arg (args, double); | |
333 | break; | |
334 | case 'c': | |
335 | dopr_outch (buffer, &currlen, maxlen, va_arg (args, int)); | |
336 | break; | |
337 | case 's': | |
338 | strvalue = va_arg (args, char *); | |
339 | if (max < 0) | |
340 | max = maxlen; /* ie, no max */ | |
341 | fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max); | |
342 | break; | |
343 | case 'p': | |
344 | strvalue = va_arg (args, void *); | |
345 | fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags); | |
346 | break; | |
347 | case 'n': | |
348 | if (cflags == DP_C_SHORT) | |
349 | { | |
350 | short int *num; | |
351 | num = va_arg (args, short int *); | |
352 | *num = currlen; | |
353 | } | |
354 | else if (cflags == DP_C_LONG) | |
355 | { | |
356 | long int *num; | |
357 | num = va_arg (args, long int *); | |
358 | *num = currlen; | |
359 | } | |
c73b8e3a | 360 | else if (cflags == DP_C_LONG_LONG) |
361 | { | |
362 | long long *num; | |
363 | num = va_arg (args, long long *); | |
364 | *num = currlen; | |
365 | } | |
2d9a148e | 366 | else |
367 | { | |
368 | int *num; | |
369 | num = va_arg (args, int *); | |
370 | *num = currlen; | |
371 | } | |
372 | break; | |
373 | case '%': | |
374 | dopr_outch (buffer, &currlen, maxlen, ch); | |
375 | break; | |
376 | case 'w': | |
377 | /* not supported yet, treat as next char */ | |
378 | ch = *format++; | |
379 | break; | |
380 | default: | |
381 | /* Unknown, skip */ | |
382 | break; | |
383 | } | |
384 | ch = *format++; | |
385 | state = DP_S_DEFAULT; | |
386 | flags = cflags = min = 0; | |
387 | max = -1; | |
388 | break; | |
389 | case DP_S_DONE: | |
390 | break; | |
391 | default: | |
392 | /* hmm? */ | |
393 | break; /* some picky compilers need this */ | |
394 | } | |
395 | } | |
396 | if (currlen < maxlen - 1) | |
397 | buffer[currlen] = '\0'; | |
398 | else | |
399 | buffer[maxlen - 1] = '\0'; | |
400 | } | |
401 | ||
402 | static void fmtstr (char *buffer, size_t *currlen, size_t maxlen, | |
403 | char *value, int flags, int min, int max) | |
404 | { | |
405 | int padlen, strln; /* amount to pad */ | |
406 | int cnt = 0; | |
407 | ||
408 | if (value == 0) | |
409 | { | |
410 | value = "<NULL>"; | |
411 | } | |
412 | ||
413 | for (strln = 0; value[strln]; ++strln); /* strlen */ | |
414 | padlen = min - strln; | |
415 | if (padlen < 0) | |
416 | padlen = 0; | |
417 | if (flags & DP_F_MINUS) | |
418 | padlen = -padlen; /* Left Justify */ | |
419 | ||
420 | while ((padlen > 0) && (cnt < max)) | |
421 | { | |
422 | dopr_outch (buffer, currlen, maxlen, ' '); | |
423 | --padlen; | |
424 | ++cnt; | |
425 | } | |
426 | while (*value && (cnt < max)) | |
427 | { | |
428 | dopr_outch (buffer, currlen, maxlen, *value++); | |
429 | ++cnt; | |
430 | } | |
431 | while ((padlen < 0) && (cnt < max)) | |
432 | { | |
433 | dopr_outch (buffer, currlen, maxlen, ' '); | |
434 | ++padlen; | |
435 | ++cnt; | |
436 | } | |
437 | } | |
438 | ||
439 | /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */ | |
440 | ||
441 | static void fmtint (char *buffer, size_t *currlen, size_t maxlen, | |
442 | long value, int base, int min, int max, int flags) | |
443 | { | |
444 | int signvalue = 0; | |
445 | unsigned long uvalue; | |
446 | char convert[20]; | |
447 | int place = 0; | |
448 | int spadlen = 0; /* amount to space pad */ | |
449 | int zpadlen = 0; /* amount to zero pad */ | |
450 | int caps = 0; | |
451 | ||
452 | if (max < 0) | |
453 | max = 0; | |
454 | ||
455 | uvalue = value; | |
456 | ||
457 | if(!(flags & DP_F_UNSIGNED)) | |
458 | { | |
459 | if( value < 0 ) { | |
460 | signvalue = '-'; | |
461 | uvalue = -value; | |
462 | } | |
463 | else | |
464 | if (flags & DP_F_PLUS) /* Do a sign (+/i) */ | |
465 | signvalue = '+'; | |
466 | else | |
467 | if (flags & DP_F_SPACE) | |
468 | signvalue = ' '; | |
469 | } | |
470 | ||
471 | if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ | |
472 | ||
473 | do { | |
474 | convert[place++] = | |
475 | (caps? "0123456789ABCDEF":"0123456789abcdef") | |
476 | [uvalue % (unsigned)base ]; | |
477 | uvalue = (uvalue / (unsigned)base ); | |
478 | } while(uvalue && (place < 20)); | |
479 | if (place == 20) place--; | |
480 | convert[place] = 0; | |
481 | ||
482 | zpadlen = max - place; | |
483 | spadlen = min - MAX (max, place) - (signvalue ? 1 : 0); | |
484 | if (zpadlen < 0) zpadlen = 0; | |
485 | if (spadlen < 0) spadlen = 0; | |
486 | if (flags & DP_F_ZERO) | |
487 | { | |
488 | zpadlen = MAX(zpadlen, spadlen); | |
489 | spadlen = 0; | |
490 | } | |
491 | if (flags & DP_F_MINUS) | |
492 | spadlen = -spadlen; /* Left Justifty */ | |
493 | ||
494 | #ifdef DEBUG_SNPRINTF | |
495 | dprint (1, (debugfile, "zpad: %d, spad: %d, min: %d, max: %d, place: %d\n", | |
496 | zpadlen, spadlen, min, max, place)); | |
dad3b556 | 497 | #endif |
498 | ||
2d9a148e | 499 | /* Spaces */ |
500 | while (spadlen > 0) | |
501 | { | |
502 | dopr_outch (buffer, currlen, maxlen, ' '); | |
503 | --spadlen; | |
504 | } | |
dad3b556 | 505 | |
2d9a148e | 506 | /* Sign */ |
507 | if (signvalue) | |
508 | dopr_outch (buffer, currlen, maxlen, signvalue); | |
dad3b556 | 509 | |
2d9a148e | 510 | /* Zeros */ |
511 | if (zpadlen > 0) | |
512 | { | |
513 | while (zpadlen > 0) | |
514 | { | |
515 | dopr_outch (buffer, currlen, maxlen, '0'); | |
516 | --zpadlen; | |
517 | } | |
518 | } | |
519 | ||
520 | /* Digits */ | |
521 | while (place > 0) | |
522 | dopr_outch (buffer, currlen, maxlen, convert[--place]); | |
523 | ||
524 | /* Left Justified spaces */ | |
525 | while (spadlen < 0) { | |
526 | dopr_outch (buffer, currlen, maxlen, ' '); | |
527 | ++spadlen; | |
528 | } | |
529 | } | |
530 | ||
531 | static long double abs_val (long double value) | |
b6019d68 | 532 | { |
2d9a148e | 533 | long double result = value; |
534 | ||
535 | if (value < 0) | |
536 | result = -value; | |
537 | ||
538 | return result; | |
b6019d68 | 539 | } |
b6019d68 | 540 | |
2d9a148e | 541 | static long double pow10 (int exp) |
dad3b556 | 542 | { |
2d9a148e | 543 | long double result = 1; |
544 | ||
545 | while (exp) | |
546 | { | |
547 | result *= 10; | |
548 | exp--; | |
549 | } | |
550 | ||
551 | return result; | |
dad3b556 | 552 | } |
553 | ||
2d9a148e | 554 | static long round (long double value) |
dad3b556 | 555 | { |
2d9a148e | 556 | long intpart; |
557 | ||
558 | intpart = value; | |
559 | value = value - intpart; | |
560 | if (value >= 0.5) | |
561 | intpart++; | |
562 | ||
563 | return intpart; | |
dad3b556 | 564 | } |
565 | ||
2d9a148e | 566 | static void fmtfp (char *buffer, size_t *currlen, size_t maxlen, |
567 | long double fvalue, int min, int max, int flags) | |
dad3b556 | 568 | { |
2d9a148e | 569 | int signvalue = 0; |
570 | long double ufvalue; | |
571 | char iconvert[20]; | |
572 | char fconvert[20]; | |
573 | int iplace = 0; | |
574 | int fplace = 0; | |
575 | int padlen = 0; /* amount to pad */ | |
576 | int zpadlen = 0; | |
577 | int caps = 0; | |
578 | long intpart; | |
579 | long fracpart; | |
580 | ||
581 | /* | |
582 | * AIX manpage says the default is 0, but Solaris says the default | |
583 | * is 6, and sprintf on AIX defaults to 6 | |
584 | */ | |
585 | if (max < 0) | |
586 | max = 6; | |
587 | ||
588 | ufvalue = abs_val (fvalue); | |
589 | ||
590 | if (fvalue < 0) | |
591 | signvalue = '-'; | |
592 | else | |
593 | if (flags & DP_F_PLUS) /* Do a sign (+/i) */ | |
594 | signvalue = '+'; | |
595 | else | |
596 | if (flags & DP_F_SPACE) | |
597 | signvalue = ' '; | |
598 | ||
599 | #if 0 | |
600 | if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ | |
601 | #endif | |
602 | ||
603 | intpart = ufvalue; | |
604 | ||
605 | /* | |
606 | * Sorry, we only support 9 digits past the decimal because of our | |
607 | * conversion method | |
608 | */ | |
609 | if (max > 9) | |
610 | max = 9; | |
611 | ||
612 | /* We "cheat" by converting the fractional part to integer by | |
613 | * multiplying by a factor of 10 | |
614 | */ | |
615 | fracpart = round ((pow10 (max)) * (ufvalue - intpart)); | |
616 | ||
617 | if (fracpart >= pow10 (max)) | |
618 | { | |
619 | intpart++; | |
620 | fracpart -= pow10 (max); | |
621 | } | |
622 | ||
623 | #ifdef DEBUG_SNPRINTF | |
624 | dprint (1, (debugfile, "fmtfp: %f =? %d.%d\n", fvalue, intpart, fracpart)); | |
625 | #endif | |
626 | ||
627 | /* Convert integer part */ | |
628 | do { | |
629 | iconvert[iplace++] = | |
630 | (caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10]; | |
631 | intpart = (intpart / 10); | |
632 | } while(intpart && (iplace < 20)); | |
633 | if (iplace == 20) iplace--; | |
634 | iconvert[iplace] = 0; | |
635 | ||
636 | /* Convert fractional part */ | |
637 | do { | |
638 | fconvert[fplace++] = | |
639 | (caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10]; | |
640 | fracpart = (fracpart / 10); | |
641 | } while(fracpart && (fplace < 20)); | |
642 | if (fplace == 20) fplace--; | |
643 | fconvert[fplace] = 0; | |
644 | ||
645 | /* -1 for decimal point, another -1 if we are printing a sign */ | |
646 | padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); | |
647 | zpadlen = max - fplace; | |
648 | if (zpadlen < 0) | |
649 | zpadlen = 0; | |
650 | if (padlen < 0) | |
651 | padlen = 0; | |
652 | if (flags & DP_F_MINUS) | |
653 | padlen = -padlen; /* Left Justifty */ | |
654 | ||
655 | if ((flags & DP_F_ZERO) && (padlen > 0)) | |
656 | { | |
657 | if (signvalue) | |
658 | { | |
659 | dopr_outch (buffer, currlen, maxlen, signvalue); | |
660 | --padlen; | |
661 | signvalue = 0; | |
662 | } | |
663 | while (padlen > 0) | |
664 | { | |
665 | dopr_outch (buffer, currlen, maxlen, '0'); | |
666 | --padlen; | |
667 | } | |
668 | } | |
669 | while (padlen > 0) | |
670 | { | |
671 | dopr_outch (buffer, currlen, maxlen, ' '); | |
672 | --padlen; | |
673 | } | |
674 | if (signvalue) | |
675 | dopr_outch (buffer, currlen, maxlen, signvalue); | |
676 | ||
677 | while (iplace > 0) | |
678 | dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]); | |
679 | ||
680 | /* | |
681 | * Decimal point. This should probably use locale to find the correct | |
682 | * char to print out. | |
683 | */ | |
684 | dopr_outch (buffer, currlen, maxlen, '.'); | |
685 | ||
686 | while (fplace > 0) | |
687 | dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]); | |
688 | ||
689 | while (zpadlen > 0) | |
690 | { | |
691 | dopr_outch (buffer, currlen, maxlen, '0'); | |
692 | --zpadlen; | |
693 | } | |
694 | ||
695 | while (padlen < 0) | |
696 | { | |
697 | dopr_outch (buffer, currlen, maxlen, ' '); | |
698 | ++padlen; | |
699 | } | |
700 | } | |
701 | ||
702 | static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c) | |
703 | { | |
704 | if (*currlen < maxlen) | |
705 | buffer[(*currlen)++] = c; | |
dad3b556 | 706 | } |
2d9a148e | 707 | #endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */ |
dad3b556 | 708 | |
2d9a148e | 709 | #ifndef HAVE_VSNPRINTF |
710 | int vsnprintf (char *str, size_t count, const char *fmt, va_list args) | |
dad3b556 | 711 | { |
2d9a148e | 712 | str[0] = 0; |
713 | dopr(str, count, fmt, args); | |
714 | return(strlen(str)); | |
dad3b556 | 715 | } |
2d9a148e | 716 | #endif /* !HAVE_VSNPRINTF */ |
dad3b556 | 717 | |
2d9a148e | 718 | #ifndef HAVE_SNPRINTF |
719 | /* VARARGS3 */ | |
720 | #ifdef HAVE_STDARGS | |
721 | int snprintf (char *str,size_t count,const char *fmt,...) | |
847e8865 | 722 | #else |
2d9a148e | 723 | int snprintf (va_alist) va_dcl |
847e8865 | 724 | #endif |
725 | { | |
2d9a148e | 726 | #ifndef HAVE_STDARGS |
727 | char *str; | |
728 | size_t count; | |
729 | char *fmt; | |
847e8865 | 730 | #endif |
2d9a148e | 731 | VA_LOCAL_DECL; |
732 | ||
733 | VA_START (fmt); | |
734 | VA_SHIFT (str, char *); | |
735 | VA_SHIFT (count, size_t ); | |
736 | VA_SHIFT (fmt, char *); | |
737 | (void) vsnprintf(str, count, fmt, ap); | |
738 | VA_END; | |
739 | return(strlen(str)); | |
740 | } | |
741 | ||
742 | #ifdef TEST_SNPRINTF | |
743 | #ifndef LONG_STRING | |
744 | #define LONG_STRING 1024 | |
745 | #endif | |
746 | int main (void) | |
747 | { | |
748 | char buf1[LONG_STRING]; | |
749 | char buf2[LONG_STRING]; | |
750 | char *fp_fmt[] = { | |
751 | "%-1.5f", | |
752 | "%1.5f", | |
753 | "%123.9f", | |
754 | "%10.5f", | |
755 | "% 10.5f", | |
756 | "%+22.9f", | |
757 | "%+4.9f", | |
758 | "%01.3f", | |
759 | "%4f", | |
760 | "%3.1f", | |
761 | "%3.2f", | |
762 | NULL | |
763 | }; | |
764 | double fp_nums[] = { -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996, | |
765 | 0.9996, 1.996, 4.136, 0}; | |
766 | char *int_fmt[] = { | |
767 | "%-1.5d", | |
768 | "%1.5d", | |
769 | "%123.9d", | |
770 | "%5.5d", | |
771 | "%10.5d", | |
772 | "% 10.5d", | |
773 | "%+22.33d", | |
774 | "%01.3d", | |
775 | "%4d", | |
c73b8e3a | 776 | "%lld", |
777 | "%qd", | |
2d9a148e | 778 | NULL |
779 | }; | |
c73b8e3a | 780 | long long int_nums[] = { -1, 134, 91340, 341, 0203, 0, 9999999 }; |
2d9a148e | 781 | int x, y; |
782 | int fail = 0; | |
783 | int num = 0; | |
784 | ||
785 | printf ("Testing snprintf format codes against system sprintf...\n"); | |
786 | ||
787 | for (x = 0; fp_fmt[x] != NULL ; x++) | |
788 | for (y = 0; fp_nums[y] != 0 ; y++) | |
789 | { | |
790 | snprintf (buf1, sizeof (buf1), fp_fmt[x], fp_nums[y]); | |
791 | sprintf (buf2, fp_fmt[x], fp_nums[y]); | |
792 | if (strcmp (buf1, buf2)) | |
793 | { | |
794 | printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n", | |
795 | fp_fmt[x], buf1, buf2); | |
796 | fail++; | |
797 | } | |
798 | num++; | |
799 | } | |
847e8865 | 800 | |
2d9a148e | 801 | for (x = 0; int_fmt[x] != NULL ; x++) |
802 | for (y = 0; int_nums[y] != 0 ; y++) | |
803 | { | |
804 | snprintf (buf1, sizeof (buf1), int_fmt[x], int_nums[y]); | |
805 | sprintf (buf2, int_fmt[x], int_nums[y]); | |
806 | if (strcmp (buf1, buf2)) | |
807 | { | |
808 | printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n", | |
809 | int_fmt[x], buf1, buf2); | |
810 | fail++; | |
811 | } | |
812 | num++; | |
813 | } | |
814 | printf ("%d tests failed out of %d.\n", fail, num); | |
847e8865 | 815 | } |
2d9a148e | 816 | #endif /* SNPRINTF_TEST */ |
847e8865 | 817 | |
2d9a148e | 818 | #endif /* !HAVE_SNPRINTF */ |