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Commit | Line | Data |
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a24cd7cc | 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 | |
6 | */ | |
7 | ||
2d9a148e | 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... | |
dad3b556 | 14 | * |
2d9a148e | 15 | * snprintf() is used instead of sprintf() as it does limit checks |
16 | * for string length. This covers a nasty loophole. | |
dad3b556 | 17 | * |
2d9a148e | 18 | * The other functions are there to prevent NULL pointers from |
19 | * causing nast effects. | |
dad3b556 | 20 | * |
2d9a148e | 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 | * | |
9a406e1e | 48 | * Andrew Tridgell (tridge@samba.org) Oct 1998 |
49 | * fixed handling of %.0f | |
50 | * added test for HAVE_LONG_DOUBLE | |
f1312c76 | 51 | * |
9a406e1e | 52 | * tridge@samba.org, idra@samba.org, April 2001 |
53 | * got rid of fcvt code (twas buggy and made testing harder) | |
54 | * added C99 semantics | |
55 | * | |
56 | * date: 2002/12/19 19:56:31; author: herb; state: Exp; lines: +2 -0 | |
57 | * actually print args for %g and %e | |
58 | * | |
59 | * date: 2002/06/03 13:37:52; author: jmcd; state: Exp; lines: +8 -0 | |
60 | * Since includes.h isn't included here, VA_COPY has to be defined here. I don't | |
61 | * see any include file that is guaranteed to be here, so I'm defining it | |
62 | * locally. Fixes AIX and Solaris builds. | |
63 | * | |
64 | * date: 2002/06/03 03:07:24; author: tridge; state: Exp; lines: +5 -13 | |
65 | * put the ifdef for HAVE_VA_COPY in one place rather than in lots of | |
66 | * functions | |
67 | * | |
68 | * date: 2002/05/17 14:51:22; author: jmcd; state: Exp; lines: +21 -4 | |
69 | * Fix usage of va_list passed as an arg. Use __va_copy before using it | |
70 | * when it exists. | |
71 | * | |
72 | * date: 2002/04/16 22:38:04; author: idra; state: Exp; lines: +20 -14 | |
73 | * Fix incorrect zpadlen handling in fmtfp. | |
74 | * Thanks to Ollie Oldham <ollie.oldham@metro-optix.com> for spotting it. | |
75 | * few mods to make it easier to compile the tests. | |
76 | * addedd the "Ollie" test to the floating point ones. | |
77 | * | |
78 | * Martin Pool (mbp@samba.org) April 2003 | |
79 | * Remove NO_CONFIG_H so that the test case can be built within a source | |
80 | * tree with less trouble. | |
81 | * Remove unnecessary SAFE_FREE() definition. | |
82 | * | |
83 | * Martin Pool (mbp@samba.org) May 2003 | |
84 | * Put in a prototype for dummy_snprintf() to quiet compiler warnings. | |
85 | * | |
86 | * Move #endif to make sure VA_COPY, LDOUBLE, etc are defined even | |
87 | * if the C library has some snprintf functions already. | |
2d9a148e | 88 | **************************************************************/ |
dad3b556 | 89 | |
0b202697 | 90 | #include "includes.h" |
91 | ||
92 | RCSID("$Id$"); | |
dad3b556 | 93 | |
4925395f | 94 | #if defined(BROKEN_SNPRINTF) /* For those with broken snprintf() */ |
95 | # undef HAVE_SNPRINTF | |
96 | # undef HAVE_VSNPRINTF | |
97 | #endif | |
98 | ||
9a406e1e | 99 | #ifndef VA_COPY |
100 | # ifdef HAVE_VA_COPY | |
101 | # define VA_COPY(dest, src) va_copy(dest, src) | |
102 | # else | |
103 | # ifdef HAVE___VA_COPY | |
104 | # define VA_COPY(dest, src) __va_copy(dest, src) | |
105 | # else | |
106 | # define VA_COPY(dest, src) (dest) = (src) | |
107 | # endif | |
108 | # endif | |
109 | #endif | |
f1312c76 | 110 | |
9a406e1e | 111 | #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) |
f1312c76 | 112 | |
9a406e1e | 113 | #ifdef HAVE_LONG_DOUBLE |
114 | # define LDOUBLE long double | |
115 | #else | |
116 | # define LDOUBLE double | |
117 | #endif | |
2d9a148e | 118 | |
9a406e1e | 119 | #ifdef HAVE_LONG_LONG |
120 | # define LLONG long long | |
121 | #else | |
122 | # define LLONG long | |
123 | #endif | |
958e5ae4 | 124 | |
2d9a148e | 125 | /* |
126 | * dopr(): poor man's version of doprintf | |
127 | */ | |
128 | ||
129 | /* format read states */ | |
130 | #define DP_S_DEFAULT 0 | |
131 | #define DP_S_FLAGS 1 | |
132 | #define DP_S_MIN 2 | |
133 | #define DP_S_DOT 3 | |
134 | #define DP_S_MAX 4 | |
135 | #define DP_S_MOD 5 | |
136 | #define DP_S_CONV 6 | |
137 | #define DP_S_DONE 7 | |
138 | ||
139 | /* format flags - Bits */ | |
140 | #define DP_F_MINUS (1 << 0) | |
141 | #define DP_F_PLUS (1 << 1) | |
142 | #define DP_F_SPACE (1 << 2) | |
143 | #define DP_F_NUM (1 << 3) | |
144 | #define DP_F_ZERO (1 << 4) | |
145 | #define DP_F_UP (1 << 5) | |
146 | #define DP_F_UNSIGNED (1 << 6) | |
147 | ||
148 | /* Conversion Flags */ | |
9a406e1e | 149 | #define DP_C_SHORT 1 |
150 | #define DP_C_LONG 2 | |
151 | #define DP_C_LDOUBLE 3 | |
152 | #define DP_C_LLONG 4 | |
153 | ||
154 | #define char_to_int(p) ((p)- '0') | |
155 | #ifndef MAX | |
156 | # define MAX(p,q) (((p) >= (q)) ? (p) : (q)) | |
157 | #endif | |
f1312c76 | 158 | |
9a406e1e | 159 | static size_t dopr(char *buffer, size_t maxlen, const char *format, |
160 | va_list args_in); | |
161 | static void fmtstr(char *buffer, size_t *currlen, size_t maxlen, | |
162 | char *value, int flags, int min, int max); | |
163 | static void fmtint(char *buffer, size_t *currlen, size_t maxlen, | |
164 | long value, int base, int min, int max, int flags); | |
165 | static void fmtfp(char *buffer, size_t *currlen, size_t maxlen, | |
166 | LDOUBLE fvalue, int min, int max, int flags); | |
167 | static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c); | |
168 | ||
169 | static size_t dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) | |
2d9a148e | 170 | { |
9a406e1e | 171 | char ch; |
172 | LLONG value; | |
173 | LDOUBLE fvalue; | |
174 | char *strvalue; | |
175 | int min; | |
176 | int max; | |
177 | int state; | |
178 | int flags; | |
179 | int cflags; | |
180 | size_t currlen; | |
181 | va_list args; | |
182 | ||
183 | VA_COPY(args, args_in); | |
184 | ||
185 | state = DP_S_DEFAULT; | |
186 | currlen = flags = cflags = min = 0; | |
187 | max = -1; | |
2d9a148e | 188 | ch = *format++; |
9a406e1e | 189 | |
f1312c76 | 190 | while (state != DP_S_DONE) { |
9a406e1e | 191 | if (ch == '\0') |
f1312c76 | 192 | state = DP_S_DONE; |
193 | ||
194 | switch(state) { | |
9901cb37 | 195 | case DP_S_DEFAULT: |
196 | if (ch == '%') | |
197 | state = DP_S_FLAGS; | |
198 | else | |
9a406e1e | 199 | dopr_outch (buffer, &currlen, maxlen, ch); |
9901cb37 | 200 | ch = *format++; |
201 | break; | |
202 | case DP_S_FLAGS: | |
203 | switch (ch) { | |
204 | case '-': | |
205 | flags |= DP_F_MINUS; | |
f1312c76 | 206 | ch = *format++; |
207 | break; | |
9901cb37 | 208 | case '+': |
209 | flags |= DP_F_PLUS; | |
210 | ch = *format++; | |
f1312c76 | 211 | break; |
9901cb37 | 212 | case ' ': |
213 | flags |= DP_F_SPACE; | |
214 | ch = *format++; | |
f1312c76 | 215 | break; |
9901cb37 | 216 | case '#': |
217 | flags |= DP_F_NUM; | |
218 | ch = *format++; | |
f1312c76 | 219 | break; |
9901cb37 | 220 | case '0': |
221 | flags |= DP_F_ZERO; | |
222 | ch = *format++; | |
f1312c76 | 223 | break; |
9901cb37 | 224 | default: |
225 | state = DP_S_MIN; | |
f1312c76 | 226 | break; |
9901cb37 | 227 | } |
228 | break; | |
229 | case DP_S_MIN: | |
230 | if (isdigit((unsigned char)ch)) { | |
9a406e1e | 231 | min = 10*min + char_to_int (ch); |
9901cb37 | 232 | ch = *format++; |
233 | } else if (ch == '*') { | |
234 | min = va_arg (args, int); | |
235 | ch = *format++; | |
236 | state = DP_S_DOT; | |
9a406e1e | 237 | } else { |
9901cb37 | 238 | state = DP_S_DOT; |
9a406e1e | 239 | } |
9901cb37 | 240 | break; |
241 | case DP_S_DOT: | |
242 | if (ch == '.') { | |
243 | state = DP_S_MAX; | |
244 | ch = *format++; | |
9a406e1e | 245 | } else { |
9901cb37 | 246 | state = DP_S_MOD; |
9a406e1e | 247 | } |
9901cb37 | 248 | break; |
249 | case DP_S_MAX: | |
250 | if (isdigit((unsigned char)ch)) { | |
251 | if (max < 0) | |
252 | max = 0; | |
9a406e1e | 253 | max = 10*max + char_to_int (ch); |
9901cb37 | 254 | ch = *format++; |
255 | } else if (ch == '*') { | |
256 | max = va_arg (args, int); | |
257 | ch = *format++; | |
258 | state = DP_S_MOD; | |
9a406e1e | 259 | } else { |
9901cb37 | 260 | state = DP_S_MOD; |
9a406e1e | 261 | } |
9901cb37 | 262 | break; |
263 | case DP_S_MOD: | |
264 | switch (ch) { | |
265 | case 'h': | |
266 | cflags = DP_C_SHORT; | |
267 | ch = *format++; | |
268 | break; | |
269 | case 'l': | |
270 | cflags = DP_C_LONG; | |
271 | ch = *format++; | |
9a406e1e | 272 | if (ch == 'l') { /* It's a long long */ |
273 | cflags = DP_C_LLONG; | |
9901cb37 | 274 | ch = *format++; |
f1312c76 | 275 | } |
9901cb37 | 276 | break; |
9901cb37 | 277 | case 'L': |
278 | cflags = DP_C_LDOUBLE; | |
f1312c76 | 279 | ch = *format++; |
f1312c76 | 280 | break; |
9901cb37 | 281 | default: |
282 | break; | |
283 | } | |
284 | state = DP_S_CONV; | |
285 | break; | |
286 | case DP_S_CONV: | |
287 | switch (ch) { | |
288 | case 'd': | |
289 | case 'i': | |
290 | if (cflags == DP_C_SHORT) | |
9a406e1e | 291 | value = va_arg (args, int); |
9901cb37 | 292 | else if (cflags == DP_C_LONG) |
9a406e1e | 293 | value = va_arg (args, long int); |
294 | else if (cflags == DP_C_LLONG) | |
295 | value = va_arg (args, LLONG); | |
9901cb37 | 296 | else |
297 | value = va_arg (args, int); | |
9a406e1e | 298 | fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); |
9901cb37 | 299 | break; |
300 | case 'o': | |
301 | flags |= DP_F_UNSIGNED; | |
302 | if (cflags == DP_C_SHORT) | |
9a406e1e | 303 | value = va_arg (args, unsigned int); |
9901cb37 | 304 | else if (cflags == DP_C_LONG) |
9a406e1e | 305 | value = (long)va_arg (args, unsigned long int); |
306 | else if (cflags == DP_C_LLONG) | |
307 | value = (long)va_arg (args, unsigned LLONG); | |
9901cb37 | 308 | else |
9a406e1e | 309 | value = (long)va_arg (args, unsigned int); |
310 | fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags); | |
f1312c76 | 311 | break; |
9901cb37 | 312 | case 'u': |
313 | flags |= DP_F_UNSIGNED; | |
314 | if (cflags == DP_C_SHORT) | |
9a406e1e | 315 | value = va_arg (args, unsigned int); |
9901cb37 | 316 | else if (cflags == DP_C_LONG) |
9a406e1e | 317 | value = (long)va_arg (args, unsigned long int); |
318 | else if (cflags == DP_C_LLONG) | |
319 | value = (LLONG)va_arg (args, unsigned LLONG); | |
9901cb37 | 320 | else |
9a406e1e | 321 | value = (long)va_arg (args, unsigned int); |
9901cb37 | 322 | fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags); |
323 | break; | |
324 | case 'X': | |
325 | flags |= DP_F_UP; | |
326 | case 'x': | |
327 | flags |= DP_F_UNSIGNED; | |
328 | if (cflags == DP_C_SHORT) | |
9a406e1e | 329 | value = va_arg (args, unsigned int); |
9901cb37 | 330 | else if (cflags == DP_C_LONG) |
9a406e1e | 331 | value = (long)va_arg (args, unsigned long int); |
332 | else if (cflags == DP_C_LLONG) | |
333 | value = (LLONG)va_arg (args, unsigned LLONG); | |
9901cb37 | 334 | else |
9a406e1e | 335 | value = (long)va_arg (args, unsigned int); |
336 | fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags); | |
9901cb37 | 337 | break; |
338 | case 'f': | |
339 | if (cflags == DP_C_LDOUBLE) | |
9a406e1e | 340 | fvalue = va_arg (args, LDOUBLE); |
9901cb37 | 341 | else |
9a406e1e | 342 | fvalue = va_arg (args, double); |
9901cb37 | 343 | /* um, floating point? */ |
9a406e1e | 344 | fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); |
9901cb37 | 345 | break; |
346 | case 'E': | |
347 | flags |= DP_F_UP; | |
348 | case 'e': | |
349 | if (cflags == DP_C_LDOUBLE) | |
9a406e1e | 350 | fvalue = va_arg (args, LDOUBLE); |
9901cb37 | 351 | else |
9a406e1e | 352 | fvalue = va_arg (args, double); |
353 | fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); | |
9901cb37 | 354 | break; |
355 | case 'G': | |
356 | flags |= DP_F_UP; | |
357 | case 'g': | |
358 | if (cflags == DP_C_LDOUBLE) | |
9a406e1e | 359 | fvalue = va_arg (args, LDOUBLE); |
9901cb37 | 360 | else |
9a406e1e | 361 | fvalue = va_arg (args, double); |
362 | fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags); | |
9901cb37 | 363 | break; |
364 | case 'c': | |
9a406e1e | 365 | dopr_outch (buffer, &currlen, maxlen, va_arg (args, int)); |
9901cb37 | 366 | break; |
367 | case 's': | |
9a406e1e | 368 | strvalue = va_arg (args, char *); |
369 | if (!strvalue) strvalue = "(NULL)"; | |
370 | if (max == -1) { | |
371 | max = strlen(strvalue); | |
372 | } | |
373 | if (min > 0 && max >= 0 && min > max) max = min; | |
374 | fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max); | |
9901cb37 | 375 | break; |
376 | case 'p': | |
9a406e1e | 377 | strvalue = va_arg (args, void *); |
378 | fmtint (buffer, &currlen, maxlen, (long) strvalue, 16, min, max, flags); | |
9901cb37 | 379 | break; |
380 | case 'n': | |
381 | if (cflags == DP_C_SHORT) { | |
382 | short int *num; | |
9a406e1e | 383 | num = va_arg (args, short int *); |
9901cb37 | 384 | *num = currlen; |
385 | } else if (cflags == DP_C_LONG) { | |
386 | long int *num; | |
9a406e1e | 387 | num = va_arg (args, long int *); |
388 | *num = (long int)currlen; | |
389 | } else if (cflags == DP_C_LLONG) { | |
390 | LLONG *num; | |
391 | num = va_arg (args, LLONG *); | |
392 | *num = (LLONG)currlen; | |
9901cb37 | 393 | } else { |
394 | int *num; | |
9a406e1e | 395 | num = va_arg (args, int *); |
9901cb37 | 396 | *num = currlen; |
397 | } | |
398 | break; | |
399 | case '%': | |
9a406e1e | 400 | dopr_outch (buffer, &currlen, maxlen, ch); |
9901cb37 | 401 | break; |
9a406e1e | 402 | case 'w': |
403 | /* not supported yet, treat as next char */ | |
9901cb37 | 404 | ch = *format++; |
405 | break; | |
9a406e1e | 406 | default: |
407 | /* Unknown, skip */ | |
408 | break; | |
9901cb37 | 409 | } |
410 | ch = *format++; | |
411 | state = DP_S_DEFAULT; | |
412 | flags = cflags = min = 0; | |
413 | max = -1; | |
414 | break; | |
415 | case DP_S_DONE: | |
416 | break; | |
9a406e1e | 417 | default: |
418 | /* hmm? */ | |
9901cb37 | 419 | break; /* some picky compilers need this */ |
f1312c76 | 420 | } |
421 | } | |
9a406e1e | 422 | if (maxlen != 0) { |
423 | if (currlen < maxlen - 1) | |
424 | buffer[currlen] = '\0'; | |
425 | else if (maxlen > 0) | |
426 | buffer[maxlen - 1] = '\0'; | |
427 | } | |
428 | ||
429 | return currlen; | |
2d9a148e | 430 | } |
431 | ||
9a406e1e | 432 | static void fmtstr(char *buffer, size_t *currlen, size_t maxlen, |
433 | char *value, int flags, int min, int max) | |
2d9a148e | 434 | { |
9a406e1e | 435 | int padlen, strln; /* amount to pad */ |
436 | int cnt = 0; | |
437 | ||
438 | #ifdef DEBUG_SNPRINTF | |
439 | printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value); | |
440 | #endif | |
441 | if (value == 0) { | |
f1312c76 | 442 | value = "<NULL>"; |
9a406e1e | 443 | } |
f1312c76 | 444 | |
201407c5 | 445 | for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */ |
f1312c76 | 446 | padlen = min - strln; |
447 | if (padlen < 0) | |
448 | padlen = 0; | |
449 | if (flags & DP_F_MINUS) | |
450 | padlen = -padlen; /* Left Justify */ | |
9a406e1e | 451 | |
f1312c76 | 452 | while ((padlen > 0) && (cnt < max)) { |
9a406e1e | 453 | dopr_outch (buffer, currlen, maxlen, ' '); |
f1312c76 | 454 | --padlen; |
455 | ++cnt; | |
456 | } | |
457 | while (*value && (cnt < max)) { | |
9a406e1e | 458 | dopr_outch (buffer, currlen, maxlen, *value++); |
f1312c76 | 459 | ++cnt; |
460 | } | |
461 | while ((padlen < 0) && (cnt < max)) { | |
9a406e1e | 462 | dopr_outch (buffer, currlen, maxlen, ' '); |
f1312c76 | 463 | ++padlen; |
464 | ++cnt; | |
465 | } | |
2d9a148e | 466 | } |
467 | ||
468 | /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */ | |
469 | ||
9a406e1e | 470 | static void fmtint(char *buffer, size_t *currlen, size_t maxlen, |
471 | long value, int base, int min, int max, int flags) | |
2d9a148e | 472 | { |
9a406e1e | 473 | int signvalue = 0; |
f1312c76 | 474 | unsigned long uvalue; |
475 | char convert[20]; | |
9a406e1e | 476 | int place = 0; |
f1312c76 | 477 | int spadlen = 0; /* amount to space pad */ |
478 | int zpadlen = 0; /* amount to zero pad */ | |
9a406e1e | 479 | int caps = 0; |
480 | ||
f1312c76 | 481 | if (max < 0) |
482 | max = 0; | |
9a406e1e | 483 | |
f1312c76 | 484 | uvalue = value; |
9a406e1e | 485 | |
486 | if(!(flags & DP_F_UNSIGNED)) { | |
487 | if( value < 0 ) { | |
f1312c76 | 488 | signvalue = '-'; |
489 | uvalue = -value; | |
9a406e1e | 490 | } else { |
491 | if (flags & DP_F_PLUS) /* Do a sign (+/i) */ | |
492 | signvalue = '+'; | |
493 | else if (flags & DP_F_SPACE) | |
494 | signvalue = ' '; | |
495 | } | |
f1312c76 | 496 | } |
2d9a148e | 497 | |
9a406e1e | 498 | if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ |
499 | ||
f1312c76 | 500 | do { |
501 | convert[place++] = | |
9a406e1e | 502 | (caps? "0123456789ABCDEF":"0123456789abcdef") |
503 | [uvalue % (unsigned)base ]; | |
f1312c76 | 504 | uvalue = (uvalue / (unsigned)base ); |
9a406e1e | 505 | } while(uvalue && (place < 20)); |
506 | if (place == 20) place--; | |
f1312c76 | 507 | convert[place] = 0; |
508 | ||
509 | zpadlen = max - place; | |
510 | spadlen = min - MAX (max, place) - (signvalue ? 1 : 0); | |
9a406e1e | 511 | if (zpadlen < 0) zpadlen = 0; |
512 | if (spadlen < 0) spadlen = 0; | |
f1312c76 | 513 | if (flags & DP_F_ZERO) { |
514 | zpadlen = MAX(zpadlen, spadlen); | |
515 | spadlen = 0; | |
516 | } | |
517 | if (flags & DP_F_MINUS) | |
518 | spadlen = -spadlen; /* Left Justifty */ | |
519 | ||
9a406e1e | 520 | #ifdef DEBUG_SNPRINTF |
521 | printf("zpad: %d, spad: %d, min: %d, max: %d, place: %d\n", | |
522 | zpadlen, spadlen, min, max, place); | |
523 | #endif | |
524 | ||
f1312c76 | 525 | /* Spaces */ |
526 | while (spadlen > 0) { | |
9a406e1e | 527 | dopr_outch (buffer, currlen, maxlen, ' '); |
f1312c76 | 528 | --spadlen; |
529 | } | |
530 | ||
531 | /* Sign */ | |
532 | if (signvalue) | |
9a406e1e | 533 | dopr_outch (buffer, currlen, maxlen, signvalue); |
f1312c76 | 534 | |
535 | /* Zeros */ | |
536 | if (zpadlen > 0) { | |
537 | while (zpadlen > 0) { | |
9a406e1e | 538 | dopr_outch (buffer, currlen, maxlen, '0'); |
f1312c76 | 539 | --zpadlen; |
540 | } | |
541 | } | |
542 | ||
543 | /* Digits */ | |
544 | while (place > 0) | |
9a406e1e | 545 | dopr_outch (buffer, currlen, maxlen, convert[--place]); |
2d9a148e | 546 | |
f1312c76 | 547 | /* Left Justified spaces */ |
548 | while (spadlen < 0) { | |
549 | dopr_outch (buffer, currlen, maxlen, ' '); | |
550 | ++spadlen; | |
551 | } | |
b6019d68 | 552 | } |
b6019d68 | 553 | |
9a406e1e | 554 | static LDOUBLE abs_val(LDOUBLE value) |
dad3b556 | 555 | { |
9a406e1e | 556 | LDOUBLE result = value; |
557 | ||
558 | if (value < 0) | |
559 | result = -value; | |
560 | ||
561 | return result; | |
562 | } | |
2d9a148e | 563 | |
9a406e1e | 564 | static LDOUBLE POW10(int exp) |
565 | { | |
566 | LDOUBLE result = 1; | |
567 | ||
f1312c76 | 568 | while (exp) { |
569 | result *= 10; | |
570 | exp--; | |
571 | } | |
2d9a148e | 572 | |
f1312c76 | 573 | return result; |
dad3b556 | 574 | } |
575 | ||
9a406e1e | 576 | static LLONG ROUND(LDOUBLE value) |
dad3b556 | 577 | { |
9a406e1e | 578 | LLONG intpart; |
2d9a148e | 579 | |
9a406e1e | 580 | intpart = (LLONG)value; |
581 | value = value - intpart; | |
582 | if (value >= 0.5) intpart++; | |
583 | ||
f1312c76 | 584 | return intpart; |
dad3b556 | 585 | } |
586 | ||
9a406e1e | 587 | /* a replacement for modf that doesn't need the math library. Should |
588 | be portable, but slow */ | |
589 | static double my_modf(double x0, double *iptr) | |
dad3b556 | 590 | { |
9a406e1e | 591 | int i; |
592 | long l; | |
593 | double x = x0; | |
594 | double f = 1.0; | |
595 | ||
596 | for (i=0;i<100;i++) { | |
597 | l = (long)x; | |
598 | if (l <= (x+1) && l >= (x-1)) break; | |
599 | x *= 0.1; | |
600 | f *= 10.0; | |
601 | } | |
602 | ||
603 | if (i == 100) { | |
604 | /* yikes! the number is beyond what we can handle. What do we do? */ | |
605 | (*iptr) = 0; | |
606 | return 0; | |
607 | } | |
608 | ||
609 | if (i != 0) { | |
610 | double i2; | |
611 | double ret; | |
612 | ||
613 | ret = my_modf(x0-l*f, &i2); | |
614 | (*iptr) = l*f + i2; | |
615 | return ret; | |
616 | } | |
617 | ||
618 | (*iptr) = l; | |
619 | return x - (*iptr); | |
620 | } | |
621 | ||
622 | ||
623 | static void fmtfp (char *buffer, size_t *currlen, size_t maxlen, | |
624 | LDOUBLE fvalue, int min, int max, int flags) | |
625 | { | |
626 | int signvalue = 0; | |
627 | double ufvalue; | |
628 | char iconvert[311]; | |
629 | char fconvert[311]; | |
630 | int iplace = 0; | |
631 | int fplace = 0; | |
f1312c76 | 632 | int padlen = 0; /* amount to pad */ |
9a406e1e | 633 | int zpadlen = 0; |
634 | int caps = 0; | |
635 | int idx; | |
636 | double intpart; | |
637 | double fracpart; | |
638 | double temp; | |
2d9a148e | 639 | |
f1312c76 | 640 | /* |
641 | * AIX manpage says the default is 0, but Solaris says the default | |
642 | * is 6, and sprintf on AIX defaults to 6 | |
643 | */ | |
644 | if (max < 0) | |
645 | max = 6; | |
646 | ||
9a406e1e | 647 | ufvalue = abs_val (fvalue); |
f1312c76 | 648 | |
9a406e1e | 649 | if (fvalue < 0) { |
f1312c76 | 650 | signvalue = '-'; |
9a406e1e | 651 | } else { |
652 | if (flags & DP_F_PLUS) { /* Do a sign (+/i) */ | |
653 | signvalue = '+'; | |
654 | } else { | |
655 | if (flags & DP_F_SPACE) | |
656 | signvalue = ' '; | |
657 | } | |
658 | } | |
f1312c76 | 659 | |
9a406e1e | 660 | #if 0 |
661 | if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */ | |
662 | #endif | |
663 | ||
664 | #if 0 | |
665 | if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */ | |
666 | #endif | |
f1312c76 | 667 | |
668 | /* | |
9a406e1e | 669 | * Sorry, we only support 16 digits past the decimal because of our |
f1312c76 | 670 | * conversion method |
671 | */ | |
9a406e1e | 672 | if (max > 16) |
673 | max = 16; | |
f1312c76 | 674 | |
675 | /* We "cheat" by converting the fractional part to integer by | |
676 | * multiplying by a factor of 10 | |
677 | */ | |
f1312c76 | 678 | |
9a406e1e | 679 | temp = ufvalue; |
680 | my_modf(temp, &intpart); | |
681 | ||
682 | fracpart = ROUND((POW10(max)) * (ufvalue - intpart)); | |
683 | ||
684 | if (fracpart >= POW10(max)) { | |
f1312c76 | 685 | intpart++; |
9a406e1e | 686 | fracpart -= POW10(max); |
f1312c76 | 687 | } |
688 | ||
689 | /* Convert integer part */ | |
690 | do { | |
9a406e1e | 691 | temp = intpart*0.1; |
692 | my_modf(temp, &intpart); | |
693 | idx = (int) ((temp -intpart +0.05)* 10.0); | |
694 | /* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */ | |
695 | /* printf ("%llf, %f, %x\n", temp, intpart, idx); */ | |
f1312c76 | 696 | iconvert[iplace++] = |
9a406e1e | 697 | (caps? "0123456789ABCDEF":"0123456789abcdef")[idx]; |
698 | } while (intpart && (iplace < 311)); | |
699 | if (iplace == 311) iplace--; | |
f1312c76 | 700 | iconvert[iplace] = 0; |
701 | ||
702 | /* Convert fractional part */ | |
9a406e1e | 703 | if (fracpart) |
704 | { | |
705 | do { | |
706 | temp = fracpart*0.1; | |
707 | my_modf(temp, &fracpart); | |
708 | idx = (int) ((temp -fracpart +0.05)* 10.0); | |
709 | /* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */ | |
710 | /* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */ | |
711 | fconvert[fplace++] = | |
712 | (caps? "0123456789ABCDEF":"0123456789abcdef")[idx]; | |
713 | } while(fracpart && (fplace < 311)); | |
714 | if (fplace == 311) fplace--; | |
715 | } | |
f1312c76 | 716 | fconvert[fplace] = 0; |
9a406e1e | 717 | |
f1312c76 | 718 | /* -1 for decimal point, another -1 if we are printing a sign */ |
719 | padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0); | |
720 | zpadlen = max - fplace; | |
9a406e1e | 721 | if (zpadlen < 0) zpadlen = 0; |
f1312c76 | 722 | if (padlen < 0) |
723 | padlen = 0; | |
724 | if (flags & DP_F_MINUS) | |
725 | padlen = -padlen; /* Left Justifty */ | |
9a406e1e | 726 | |
f1312c76 | 727 | if ((flags & DP_F_ZERO) && (padlen > 0)) { |
728 | if (signvalue) { | |
9a406e1e | 729 | dopr_outch (buffer, currlen, maxlen, signvalue); |
f1312c76 | 730 | --padlen; |
731 | signvalue = 0; | |
732 | } | |
733 | while (padlen > 0) { | |
9a406e1e | 734 | dopr_outch (buffer, currlen, maxlen, '0'); |
f1312c76 | 735 | --padlen; |
736 | } | |
737 | } | |
738 | while (padlen > 0) { | |
9a406e1e | 739 | dopr_outch (buffer, currlen, maxlen, ' '); |
f1312c76 | 740 | --padlen; |
741 | } | |
742 | if (signvalue) | |
9a406e1e | 743 | dopr_outch (buffer, currlen, maxlen, signvalue); |
744 | ||
f1312c76 | 745 | while (iplace > 0) |
9a406e1e | 746 | dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]); |
747 | ||
748 | #ifdef DEBUG_SNPRINTF | |
749 | printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen); | |
750 | #endif | |
f1312c76 | 751 | |
752 | /* | |
9a406e1e | 753 | * Decimal point. This should probably use locale to find the correct |
754 | * char to print out. | |
f1312c76 | 755 | */ |
9a406e1e | 756 | if (max > 0) { |
757 | dopr_outch (buffer, currlen, maxlen, '.'); | |
758 | ||
759 | while (zpadlen > 0) { | |
760 | dopr_outch (buffer, currlen, maxlen, '0'); | |
761 | --zpadlen; | |
762 | } | |
f1312c76 | 763 | |
9a406e1e | 764 | while (fplace > 0) |
765 | dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]); | |
f1312c76 | 766 | } |
767 | ||
768 | while (padlen < 0) { | |
9a406e1e | 769 | dopr_outch (buffer, currlen, maxlen, ' '); |
f1312c76 | 770 | ++padlen; |
771 | } | |
2d9a148e | 772 | } |
773 | ||
9a406e1e | 774 | static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c) |
2d9a148e | 775 | { |
9a406e1e | 776 | if (*currlen < maxlen) { |
777 | buffer[(*currlen)] = c; | |
778 | } | |
779 | (*currlen)++; | |
dad3b556 | 780 | } |
2d9a148e | 781 | #endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */ |
dad3b556 | 782 | |
9a406e1e | 783 | #if !defined(HAVE_VSNPRINTF) |
784 | int vsnprintf (char *str, size_t count, const char *fmt, va_list args) | |
dad3b556 | 785 | { |
9a406e1e | 786 | return dopr(str, count, fmt, args); |
dad3b556 | 787 | } |
9a406e1e | 788 | #endif |
dad3b556 | 789 | |
9a406e1e | 790 | #if !defined(HAVE_SNPRINTF) |
31b0732a | 791 | int snprintf(char *str, size_t count, SNPRINTF_CONST char *fmt, ...) |
847e8865 | 792 | { |
9a406e1e | 793 | size_t ret; |
f1312c76 | 794 | va_list ap; |
795 | ||
796 | va_start(ap, fmt); | |
9a406e1e | 797 | ret = vsnprintf(str, count, fmt, ap); |
f1312c76 | 798 | va_end(ap); |
9a406e1e | 799 | return ret; |
2d9a148e | 800 | } |
9a406e1e | 801 | #endif |
2d9a148e | 802 |