e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 Sam Lantinga |
4 | |
5 | This library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | This library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with this library; if not, write to the Free Software |
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
18 | |
19 | Sam Lantinga |
20 | slouken@libsdl.org |
21 | */ |
22 | #include "SDL_config.h" |
23 | |
24 | /* This file contains portable string manipulation functions for SDL */ |
25 | |
26 | #include "SDL_stdinc.h" |
27 | |
28 | |
29 | #define SDL_isupperhex(X) (((X) >= 'A') && ((X) <= 'F')) |
30 | #define SDL_islowerhex(X) (((X) >= 'a') && ((X) <= 'f')) |
31 | |
32 | #if !defined(HAVE_SSCANF) || !defined(HAVE_STRTOL) |
33 | static size_t SDL_ScanLong(const char *text, int radix, long *valuep) |
34 | { |
35 | const char *textstart = text; |
36 | long value = 0; |
37 | SDL_bool negative = SDL_FALSE; |
38 | |
39 | if ( *text == '-' ) { |
40 | negative = SDL_TRUE; |
41 | ++text; |
42 | } |
43 | if ( radix == 16 && SDL_strncmp(text, "0x", 2) == 0 ) { |
44 | text += 2; |
45 | } |
46 | for ( ; ; ) { |
47 | int v; |
48 | if ( SDL_isdigit((unsigned char) *text) ) { |
49 | v = *text - '0'; |
50 | } else if ( radix == 16 && SDL_isupperhex(*text) ) { |
51 | v = 10 + (*text - 'A'); |
52 | } else if ( radix == 16 && SDL_islowerhex(*text) ) { |
53 | v = 10 + (*text - 'a'); |
54 | } else { |
55 | break; |
56 | } |
57 | value *= radix; |
58 | value += v; |
59 | ++text; |
60 | } |
61 | if ( valuep ) { |
62 | if ( negative && value ) { |
63 | *valuep = -value; |
64 | } else { |
65 | *valuep = value; |
66 | } |
67 | } |
68 | return (text - textstart); |
69 | } |
70 | #endif |
71 | |
72 | #if !defined(HAVE_SSCANF) || !defined(HAVE_STRTOUL) || !defined(HAVE_STRTOD) |
73 | static size_t SDL_ScanUnsignedLong(const char *text, int radix, unsigned long *valuep) |
74 | { |
75 | const char *textstart = text; |
76 | unsigned long value = 0; |
77 | |
78 | if ( radix == 16 && SDL_strncmp(text, "0x", 2) == 0 ) { |
79 | text += 2; |
80 | } |
81 | for ( ; ; ) { |
82 | int v; |
83 | if ( SDL_isdigit((unsigned char) *text) ) { |
84 | v = *text - '0'; |
85 | } else if ( radix == 16 && SDL_isupperhex(*text) ) { |
86 | v = 10 + (*text - 'A'); |
87 | } else if ( radix == 16 && SDL_islowerhex(*text) ) { |
88 | v = 10 + (*text - 'a'); |
89 | } else { |
90 | break; |
91 | } |
92 | value *= radix; |
93 | value += v; |
94 | ++text; |
95 | } |
96 | if ( valuep ) { |
97 | *valuep = value; |
98 | } |
99 | return (text - textstart); |
100 | } |
101 | #endif |
102 | |
103 | #ifndef HAVE_SSCANF |
104 | static size_t SDL_ScanUintPtrT(const char *text, int radix, uintptr_t *valuep) |
105 | { |
106 | const char *textstart = text; |
107 | uintptr_t value = 0; |
108 | |
109 | if ( radix == 16 && SDL_strncmp(text, "0x", 2) == 0 ) { |
110 | text += 2; |
111 | } |
112 | for ( ; ; ) { |
113 | int v; |
114 | if ( SDL_isdigit((unsigned char) *text) ) { |
115 | v = *text - '0'; |
116 | } else if ( radix == 16 && SDL_isupperhex(*text) ) { |
117 | v = 10 + (*text - 'A'); |
118 | } else if ( radix == 16 && SDL_islowerhex(*text) ) { |
119 | v = 10 + (*text - 'a'); |
120 | } else { |
121 | break; |
122 | } |
123 | value *= radix; |
124 | value += v; |
125 | ++text; |
126 | } |
127 | if ( valuep ) { |
128 | *valuep = value; |
129 | } |
130 | return (text - textstart); |
131 | } |
132 | #endif |
133 | |
134 | #ifdef SDL_HAS_64BIT_TYPE |
135 | #if !defined(HAVE_SSCANF) || !defined(HAVE_STRTOLL) |
136 | static size_t SDL_ScanLongLong(const char *text, int radix, Sint64 *valuep) |
137 | { |
138 | const char *textstart = text; |
139 | Sint64 value = 0; |
140 | SDL_bool negative = SDL_FALSE; |
141 | |
142 | if ( *text == '-' ) { |
143 | negative = SDL_TRUE; |
144 | ++text; |
145 | } |
146 | if ( radix == 16 && SDL_strncmp(text, "0x", 2) == 0 ) { |
147 | text += 2; |
148 | } |
149 | for ( ; ; ) { |
150 | int v; |
151 | if ( SDL_isdigit((unsigned char) *text) ) { |
152 | v = *text - '0'; |
153 | } else if ( radix == 16 && SDL_isupperhex(*text) ) { |
154 | v = 10 + (*text - 'A'); |
155 | } else if ( radix == 16 && SDL_islowerhex(*text) ) { |
156 | v = 10 + (*text - 'a'); |
157 | } else { |
158 | break; |
159 | } |
160 | value *= radix; |
161 | value += v; |
162 | ++text; |
163 | } |
164 | if ( valuep ) { |
165 | if ( negative && value ) { |
166 | *valuep = -value; |
167 | } else { |
168 | *valuep = value; |
169 | } |
170 | } |
171 | return (text - textstart); |
172 | } |
173 | #endif |
174 | |
175 | #if !defined(HAVE_SSCANF) || !defined(HAVE_STRTOULL) |
176 | static size_t SDL_ScanUnsignedLongLong(const char *text, int radix, Uint64 *valuep) |
177 | { |
178 | const char *textstart = text; |
179 | Uint64 value = 0; |
180 | |
181 | if ( radix == 16 && SDL_strncmp(text, "0x", 2) == 0 ) { |
182 | text += 2; |
183 | } |
184 | for ( ; ; ) { |
185 | int v; |
186 | if ( SDL_isdigit((unsigned char) *text) ) { |
187 | v = *text - '0'; |
188 | } else if ( radix == 16 && SDL_isupperhex(*text) ) { |
189 | v = 10 + (*text - 'A'); |
190 | } else if ( radix == 16 && SDL_islowerhex(*text) ) { |
191 | v = 10 + (*text - 'a'); |
192 | } else { |
193 | break; |
194 | } |
195 | value *= radix; |
196 | value += v; |
197 | ++text; |
198 | } |
199 | if ( valuep ) { |
200 | *valuep = value; |
201 | } |
202 | return (text - textstart); |
203 | } |
204 | #endif |
205 | #endif /* SDL_HAS_64BIT_TYPE */ |
206 | |
207 | #if !defined(HAVE_SSCANF) || !defined(HAVE_STRTOD) |
208 | static size_t SDL_ScanFloat(const char *text, double *valuep) |
209 | { |
210 | const char *textstart = text; |
211 | unsigned long lvalue = 0; |
212 | double value = 0.0; |
213 | SDL_bool negative = SDL_FALSE; |
214 | |
215 | if ( *text == '-' ) { |
216 | negative = SDL_TRUE; |
217 | ++text; |
218 | } |
219 | text += SDL_ScanUnsignedLong(text, 10, &lvalue); |
220 | value += lvalue; |
221 | if ( *text == '.' ) { |
222 | int mult = 10; |
223 | ++text; |
224 | while ( SDL_isdigit((unsigned char) *text) ) { |
225 | lvalue = *text - '0'; |
226 | value += (double)lvalue / mult; |
227 | mult *= 10; |
228 | ++text; |
229 | } |
230 | } |
231 | if ( valuep ) { |
232 | if ( negative && value ) { |
233 | *valuep = -value; |
234 | } else { |
235 | *valuep = value; |
236 | } |
237 | } |
238 | return (text - textstart); |
239 | } |
240 | #endif |
241 | |
242 | #ifndef SDL_memset |
243 | void *SDL_memset(void *dst, int c, size_t len) |
244 | { |
245 | size_t left = (len % 4); |
246 | if ( len >= 4 ) { |
247 | Uint32 value = 0; |
248 | Uint32 *dstp = (Uint32 *)dst; |
249 | int i; |
250 | for (i = 0; i < 4; ++i) { |
251 | value <<= 8; |
252 | value |= c; |
253 | } |
254 | len /= 4; |
255 | while ( len-- ) { |
256 | *dstp++ = value; |
257 | } |
258 | } |
259 | if ( left > 0 ) { |
260 | Uint8 value = (Uint8)c; |
261 | Uint8 *dstp = (Uint8 *)dst; |
262 | switch(left) { |
263 | case 3: |
264 | *dstp++ = value; |
265 | case 2: |
266 | *dstp++ = value; |
267 | case 1: |
268 | *dstp++ = value; |
269 | } |
270 | } |
271 | return dst; |
272 | } |
273 | #endif |
274 | |
275 | #ifndef SDL_memcpy |
276 | void *SDL_memcpy(void *dst, const void *src, size_t len) |
277 | { |
278 | char *srcp = (char *)src; |
279 | char *dstp = (char *)dst; |
280 | while ( len-- ) { |
281 | *dstp++ = *srcp++; |
282 | } |
283 | return dst; |
284 | } |
285 | #endif |
286 | |
287 | #ifndef SDL_revcpy |
288 | void *SDL_revcpy(void *dst, const void *src, size_t len) |
289 | { |
290 | char *srcp = (char *)src; |
291 | char *dstp = (char *)dst; |
292 | srcp += len-1; |
293 | dstp += len-1; |
294 | while ( len-- ) { |
295 | *dstp-- = *srcp--; |
296 | } |
297 | return dst; |
298 | } |
299 | #endif |
300 | |
301 | #ifndef SDL_memcmp |
302 | int SDL_memcmp(const void *s1, const void *s2, size_t len) |
303 | { |
304 | char *s1p = (char *)s1; |
305 | char *s2p = (char *)s2; |
306 | while ( len-- ) { |
307 | if ( *s1p != *s2p ) { |
308 | return (*s1p - *s2p); |
309 | } |
310 | ++s1p; |
311 | ++s2p; |
312 | } |
313 | return 0; |
314 | } |
315 | #endif |
316 | |
317 | #ifndef HAVE_STRLEN |
318 | size_t SDL_strlen(const char *string) |
319 | { |
320 | size_t len = 0; |
321 | while ( *string++ ) { |
322 | ++len; |
323 | } |
324 | return len; |
325 | } |
326 | #endif |
327 | |
328 | #ifndef HAVE_STRLCPY |
329 | size_t SDL_strlcpy(char *dst, const char *src, size_t maxlen) |
330 | { |
331 | size_t srclen = SDL_strlen(src); |
332 | if ( maxlen > 0 ) { |
333 | size_t len = SDL_min(srclen, maxlen-1); |
334 | SDL_memcpy(dst, src, len); |
335 | dst[len] = '\0'; |
336 | } |
337 | return srclen; |
338 | } |
339 | #endif |
340 | |
341 | #ifndef HAVE_STRLCAT |
342 | size_t SDL_strlcat(char *dst, const char *src, size_t maxlen) |
343 | { |
344 | size_t dstlen = SDL_strlen(dst); |
345 | size_t srclen = SDL_strlen(src); |
346 | if ( dstlen < maxlen ) { |
347 | SDL_strlcpy(dst+dstlen, src, maxlen-dstlen); |
348 | } |
349 | return dstlen+srclen; |
350 | } |
351 | #endif |
352 | |
353 | #ifndef HAVE_STRDUP |
354 | char *SDL_strdup(const char *string) |
355 | { |
356 | size_t len = SDL_strlen(string)+1; |
357 | char *newstr = SDL_malloc(len); |
358 | if ( newstr ) { |
359 | SDL_strlcpy(newstr, string, len); |
360 | } |
361 | return newstr; |
362 | } |
363 | #endif |
364 | |
365 | #ifndef HAVE__STRREV |
366 | char *SDL_strrev(char *string) |
367 | { |
368 | size_t len = SDL_strlen(string); |
369 | char *a = &string[0]; |
370 | char *b = &string[len-1]; |
371 | len /= 2; |
372 | while ( len-- ) { |
373 | char c = *a; |
374 | *a++ = *b; |
375 | *b-- = c; |
376 | } |
377 | return string; |
378 | } |
379 | #endif |
380 | |
381 | #ifndef HAVE__STRUPR |
382 | char *SDL_strupr(char *string) |
383 | { |
384 | char *bufp = string; |
385 | while ( *bufp ) { |
386 | *bufp = SDL_toupper((unsigned char) *bufp); |
387 | ++bufp; |
388 | } |
389 | return string; |
390 | } |
391 | #endif |
392 | |
393 | #ifndef HAVE__STRLWR |
394 | char *SDL_strlwr(char *string) |
395 | { |
396 | char *bufp = string; |
397 | while ( *bufp ) { |
398 | *bufp = SDL_tolower((unsigned char) *bufp); |
399 | ++bufp; |
400 | } |
401 | return string; |
402 | } |
403 | #endif |
404 | |
405 | #ifndef HAVE_STRCHR |
406 | char *SDL_strchr(const char *string, int c) |
407 | { |
408 | while ( *string ) { |
409 | if ( *string == c ) { |
410 | return (char *)string; |
411 | } |
412 | ++string; |
413 | } |
414 | return NULL; |
415 | } |
416 | #endif |
417 | |
418 | #ifndef HAVE_STRRCHR |
419 | char *SDL_strrchr(const char *string, int c) |
420 | { |
421 | const char *bufp = string + SDL_strlen(string) - 1; |
422 | while ( bufp >= string ) { |
423 | if ( *bufp == c ) { |
424 | return (char *)bufp; |
425 | } |
426 | --bufp; |
427 | } |
428 | return NULL; |
429 | } |
430 | #endif |
431 | |
432 | #ifndef HAVE_STRSTR |
433 | char *SDL_strstr(const char *haystack, const char *needle) |
434 | { |
435 | size_t length = SDL_strlen(needle); |
436 | while ( *haystack ) { |
437 | if ( SDL_strncmp(haystack, needle, length) == 0 ) { |
438 | return (char *)haystack; |
439 | } |
440 | ++haystack; |
441 | } |
442 | return NULL; |
443 | } |
444 | #endif |
445 | |
446 | #if !defined(HAVE__LTOA) || !defined(HAVE__I64TOA) || \ |
447 | !defined(HAVE__ULTOA) || !defined(HAVE__UI64TOA) |
448 | static const char ntoa_table[] = { |
449 | '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', |
450 | 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', |
451 | 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', |
452 | 'U', 'V', 'W', 'X', 'Y', 'Z' |
453 | }; |
454 | #endif /* ntoa() conversion table */ |
455 | |
456 | #ifndef HAVE__LTOA |
457 | char *SDL_ltoa(long value, char *string, int radix) |
458 | { |
459 | char *bufp = string; |
460 | |
461 | if ( value < 0 ) { |
462 | *bufp++ = '-'; |
463 | value = -value; |
464 | } |
465 | if ( value ) { |
466 | while ( value > 0 ) { |
467 | *bufp++ = ntoa_table[value % radix]; |
468 | value /= radix; |
469 | } |
470 | } else { |
471 | *bufp++ = '0'; |
472 | } |
473 | *bufp = '\0'; |
474 | |
475 | /* The numbers went into the string backwards. :) */ |
476 | if ( *string == '-' ) { |
477 | SDL_strrev(string+1); |
478 | } else { |
479 | SDL_strrev(string); |
480 | } |
481 | |
482 | return string; |
483 | } |
484 | #endif |
485 | |
486 | #ifndef HAVE__ULTOA |
487 | char *SDL_ultoa(unsigned long value, char *string, int radix) |
488 | { |
489 | char *bufp = string; |
490 | |
491 | if ( value ) { |
492 | while ( value > 0 ) { |
493 | *bufp++ = ntoa_table[value % radix]; |
494 | value /= radix; |
495 | } |
496 | } else { |
497 | *bufp++ = '0'; |
498 | } |
499 | *bufp = '\0'; |
500 | |
501 | /* The numbers went into the string backwards. :) */ |
502 | SDL_strrev(string); |
503 | |
504 | return string; |
505 | } |
506 | #endif |
507 | |
508 | #ifndef HAVE_STRTOL |
509 | long SDL_strtol(const char *string, char **endp, int base) |
510 | { |
511 | size_t len; |
512 | long value; |
513 | |
514 | if ( !base ) { |
515 | if ( (SDL_strlen(string) > 2) && (SDL_strncmp(string, "0x", 2) == 0) ) { |
516 | base = 16; |
517 | } else { |
518 | base = 10; |
519 | } |
520 | } |
521 | |
522 | len = SDL_ScanLong(string, base, &value); |
523 | if ( endp ) { |
524 | *endp = (char *)string + len; |
525 | } |
526 | return value; |
527 | } |
528 | #endif |
529 | |
530 | #ifndef HAVE_STRTOUL |
531 | unsigned long SDL_strtoul(const char *string, char **endp, int base) |
532 | { |
533 | size_t len; |
534 | unsigned long value; |
535 | |
536 | if ( !base ) { |
537 | if ( (SDL_strlen(string) > 2) && (SDL_strncmp(string, "0x", 2) == 0) ) { |
538 | base = 16; |
539 | } else { |
540 | base = 10; |
541 | } |
542 | } |
543 | |
544 | len = SDL_ScanUnsignedLong(string, base, &value); |
545 | if ( endp ) { |
546 | *endp = (char *)string + len; |
547 | } |
548 | return value; |
549 | } |
550 | #endif |
551 | |
552 | #ifdef SDL_HAS_64BIT_TYPE |
553 | |
554 | #ifndef HAVE__I64TOA |
555 | char *SDL_lltoa(Sint64 value, char *string, int radix) |
556 | { |
557 | char *bufp = string; |
558 | |
559 | if ( value < 0 ) { |
560 | *bufp++ = '-'; |
561 | value = -value; |
562 | } |
563 | if ( value ) { |
564 | while ( value > 0 ) { |
565 | *bufp++ = ntoa_table[value % radix]; |
566 | value /= radix; |
567 | } |
568 | } else { |
569 | *bufp++ = '0'; |
570 | } |
571 | *bufp = '\0'; |
572 | |
573 | /* The numbers went into the string backwards. :) */ |
574 | if ( *string == '-' ) { |
575 | SDL_strrev(string+1); |
576 | } else { |
577 | SDL_strrev(string); |
578 | } |
579 | |
580 | return string; |
581 | } |
582 | #endif |
583 | |
584 | #ifndef HAVE__UI64TOA |
585 | char *SDL_ulltoa(Uint64 value, char *string, int radix) |
586 | { |
587 | char *bufp = string; |
588 | |
589 | if ( value ) { |
590 | while ( value > 0 ) { |
591 | *bufp++ = ntoa_table[value % radix]; |
592 | value /= radix; |
593 | } |
594 | } else { |
595 | *bufp++ = '0'; |
596 | } |
597 | *bufp = '\0'; |
598 | |
599 | /* The numbers went into the string backwards. :) */ |
600 | SDL_strrev(string); |
601 | |
602 | return string; |
603 | } |
604 | #endif |
605 | |
606 | #ifndef HAVE_STRTOLL |
607 | Sint64 SDL_strtoll(const char *string, char **endp, int base) |
608 | { |
609 | size_t len; |
610 | Sint64 value; |
611 | |
612 | if ( !base ) { |
613 | if ( (SDL_strlen(string) > 2) && (SDL_strncmp(string, "0x", 2) == 0) ) { |
614 | base = 16; |
615 | } else { |
616 | base = 10; |
617 | } |
618 | } |
619 | |
620 | len = SDL_ScanLongLong(string, base, &value); |
621 | if ( endp ) { |
622 | *endp = (char *)string + len; |
623 | } |
624 | return value; |
625 | } |
626 | #endif |
627 | |
628 | #ifndef HAVE_STRTOULL |
629 | Uint64 SDL_strtoull(const char *string, char **endp, int base) |
630 | { |
631 | size_t len; |
632 | Uint64 value; |
633 | |
634 | if ( !base ) { |
635 | if ( (SDL_strlen(string) > 2) && (SDL_strncmp(string, "0x", 2) == 0) ) { |
636 | base = 16; |
637 | } else { |
638 | base = 10; |
639 | } |
640 | } |
641 | |
642 | len = SDL_ScanUnsignedLongLong(string, base, &value); |
643 | if ( endp ) { |
644 | *endp = (char *)string + len; |
645 | } |
646 | return value; |
647 | } |
648 | #endif |
649 | |
650 | #endif /* SDL_HAS_64BIT_TYPE */ |
651 | |
652 | #ifndef HAVE_STRTOD |
653 | double SDL_strtod(const char *string, char **endp) |
654 | { |
655 | size_t len; |
656 | double value; |
657 | |
658 | len = SDL_ScanFloat(string, &value); |
659 | if ( endp ) { |
660 | *endp = (char *)string + len; |
661 | } |
662 | return value; |
663 | } |
664 | #endif |
665 | |
666 | #ifndef HAVE_STRCMP |
667 | int SDL_strcmp(const char *str1, const char *str2) |
668 | { |
669 | while (*str1 && *str2) { |
670 | if ( *str1 != *str2 ) |
671 | break; |
672 | ++str1; |
673 | ++str2; |
674 | } |
675 | return (int)((unsigned char)*str1 - (unsigned char)*str2); |
676 | } |
677 | #endif |
678 | |
679 | #ifndef HAVE_STRNCMP |
680 | int SDL_strncmp(const char *str1, const char *str2, size_t maxlen) |
681 | { |
682 | while ( *str1 && *str2 && maxlen ) { |
683 | if ( *str1 != *str2 ) |
684 | break; |
685 | ++str1; |
686 | ++str2; |
687 | --maxlen; |
688 | } |
689 | if ( ! maxlen ) { |
690 | return 0; |
691 | } |
692 | return (int)((unsigned char)*str1 - (unsigned char)*str2); |
693 | } |
694 | #endif |
695 | |
696 | #if !defined(HAVE_STRCASECMP) && !defined(HAVE__STRICMP) |
697 | int SDL_strcasecmp(const char *str1, const char *str2) |
698 | { |
699 | char a = 0; |
700 | char b = 0; |
701 | while ( *str1 && *str2 ) { |
702 | a = SDL_tolower((unsigned char) *str1); |
703 | b = SDL_tolower((unsigned char) *str2); |
704 | if ( a != b ) |
705 | break; |
706 | ++str1; |
707 | ++str2; |
708 | } |
709 | return (int)((unsigned char)a - (unsigned char)b); |
710 | } |
711 | #endif |
712 | |
713 | #if !defined(HAVE_STRNCASECMP) && !defined(HAVE__STRNICMP) |
714 | int SDL_strncasecmp(const char *str1, const char *str2, size_t maxlen) |
715 | { |
716 | char a = 0; |
717 | char b = 0; |
718 | while ( *str1 && *str2 && maxlen ) { |
719 | a = SDL_tolower((unsigned char) *str1); |
720 | b = SDL_tolower((unsigned char) *str2); |
721 | if ( a != b ) |
722 | break; |
723 | ++str1; |
724 | ++str2; |
725 | --maxlen; |
726 | } |
727 | return (int)((unsigned char)a - (unsigned char)b); |
728 | } |
729 | #endif |
730 | |
731 | #ifndef HAVE_SSCANF |
732 | int SDL_sscanf(const char *text, const char *fmt, ...) |
733 | { |
734 | va_list ap; |
735 | int retval = 0; |
736 | |
737 | va_start(ap, fmt); |
738 | while ( *fmt ) { |
739 | if ( *fmt == ' ' ) { |
740 | while ( SDL_isspace((unsigned char) *text) ) { |
741 | ++text; |
742 | } |
743 | ++fmt; |
744 | continue; |
745 | } |
746 | if ( *fmt == '%' ) { |
747 | SDL_bool done = SDL_FALSE; |
748 | long count = 0; |
749 | int radix = 10; |
750 | enum { |
751 | DO_SHORT, |
752 | DO_INT, |
753 | DO_LONG, |
754 | DO_LONGLONG |
755 | } inttype = DO_INT; |
756 | SDL_bool suppress = SDL_FALSE; |
757 | |
758 | ++fmt; |
759 | if ( *fmt == '%' ) { |
760 | if ( *text == '%' ) { |
761 | ++text; |
762 | ++fmt; |
763 | continue; |
764 | } |
765 | break; |
766 | } |
767 | if ( *fmt == '*' ) { |
768 | suppress = SDL_TRUE; |
769 | ++fmt; |
770 | } |
771 | fmt += SDL_ScanLong(fmt, 10, &count); |
772 | |
773 | if ( *fmt == 'c' ) { |
774 | if ( ! count ) { |
775 | count = 1; |
776 | } |
777 | if ( suppress ) { |
778 | while ( count-- ) { |
779 | ++text; |
780 | } |
781 | } else { |
782 | char *valuep = va_arg(ap, char*); |
783 | while ( count-- ) { |
784 | *valuep++ = *text++; |
785 | } |
786 | ++retval; |
787 | } |
788 | continue; |
789 | } |
790 | |
791 | while ( SDL_isspace((unsigned char) *text) ) { |
792 | ++text; |
793 | } |
794 | |
795 | /* FIXME: implement more of the format specifiers */ |
796 | while (!done) { |
797 | switch(*fmt) { |
798 | case '*': |
799 | suppress = SDL_TRUE; |
800 | break; |
801 | case 'h': |
802 | if ( inttype > DO_SHORT ) { |
803 | ++inttype; |
804 | } |
805 | break; |
806 | case 'l': |
807 | if ( inttype < DO_LONGLONG ) { |
808 | ++inttype; |
809 | } |
810 | break; |
811 | case 'I': |
812 | if ( SDL_strncmp(fmt, "I64", 3) == 0 ) { |
813 | fmt += 2; |
814 | inttype = DO_LONGLONG; |
815 | } |
816 | break; |
817 | case 'i': |
818 | { |
819 | int index = 0; |
820 | if ( text[index] == '-' ) { |
821 | ++index; |
822 | } |
823 | if ( text[index] == '0' ) { |
824 | if ( SDL_tolower((unsigned char) text[index+1]) == 'x' ) { |
825 | radix = 16; |
826 | } else { |
827 | radix = 8; |
828 | } |
829 | } |
830 | } |
831 | /* Fall through to %d handling */ |
832 | case 'd': |
833 | #ifdef SDL_HAS_64BIT_TYPE |
834 | if ( inttype == DO_LONGLONG ) { |
835 | Sint64 value; |
836 | text += SDL_ScanLongLong(text, radix, &value); |
837 | if ( ! suppress ) { |
838 | Sint64 *valuep = va_arg(ap, Sint64*); |
839 | *valuep = value; |
840 | ++retval; |
841 | } |
842 | } |
843 | else |
844 | #endif /* SDL_HAS_64BIT_TYPE */ |
845 | { |
846 | long value; |
847 | text += SDL_ScanLong(text, radix, &value); |
848 | if ( ! suppress ) { |
849 | switch (inttype) { |
850 | case DO_SHORT: |
851 | { short* valuep = va_arg(ap, short*); |
852 | *valuep = (short)value; |
853 | } |
854 | break; |
855 | case DO_INT: |
856 | { int* valuep = va_arg(ap, int*); |
857 | *valuep = (int)value; |
858 | } |
859 | break; |
860 | case DO_LONG: |
861 | { long* valuep = va_arg(ap, long*); |
862 | *valuep = value; |
863 | } |
864 | break; |
865 | case DO_LONGLONG: |
866 | /* Handled above */ |
867 | break; |
868 | } |
869 | ++retval; |
870 | } |
871 | } |
872 | done = SDL_TRUE; |
873 | break; |
874 | case 'o': |
875 | if ( radix == 10 ) { |
876 | radix = 8; |
877 | } |
878 | /* Fall through to unsigned handling */ |
879 | case 'x': |
880 | case 'X': |
881 | if ( radix == 10 ) { |
882 | radix = 16; |
883 | } |
884 | /* Fall through to unsigned handling */ |
885 | case 'u': |
886 | #ifdef SDL_HAS_64BIT_TYPE |
887 | if ( inttype == DO_LONGLONG ) { |
888 | Uint64 value; |
889 | text += SDL_ScanUnsignedLongLong(text, radix, &value); |
890 | if ( ! suppress ) { |
891 | Uint64 *valuep = va_arg(ap, Uint64*); |
892 | *valuep = value; |
893 | ++retval; |
894 | } |
895 | } |
896 | else |
897 | #endif /* SDL_HAS_64BIT_TYPE */ |
898 | { |
899 | unsigned long value; |
900 | text += SDL_ScanUnsignedLong(text, radix, &value); |
901 | if ( ! suppress ) { |
902 | switch (inttype) { |
903 | case DO_SHORT: |
904 | { short* valuep = va_arg(ap, short*); |
905 | *valuep = (short)value; |
906 | } |
907 | break; |
908 | case DO_INT: |
909 | { int* valuep = va_arg(ap, int*); |
910 | *valuep = (int)value; |
911 | } |
912 | break; |
913 | case DO_LONG: |
914 | { long* valuep = va_arg(ap, long*); |
915 | *valuep = value; |
916 | } |
917 | break; |
918 | case DO_LONGLONG: |
919 | /* Handled above */ |
920 | break; |
921 | } |
922 | ++retval; |
923 | } |
924 | } |
925 | done = SDL_TRUE; |
926 | break; |
927 | case 'p': |
928 | { |
929 | uintptr_t value; |
930 | text += SDL_ScanUintPtrT(text, 16, &value); |
931 | if ( ! suppress ) { |
932 | void** valuep = va_arg(ap, void**); |
933 | *valuep = (void*)value; |
934 | ++retval; |
935 | } |
936 | } |
937 | done = SDL_TRUE; |
938 | break; |
939 | case 'f': |
940 | { |
941 | double value; |
942 | text += SDL_ScanFloat(text, &value); |
943 | if ( ! suppress ) { |
944 | float* valuep = va_arg(ap, float*); |
945 | *valuep = (float)value; |
946 | ++retval; |
947 | } |
948 | } |
949 | done = SDL_TRUE; |
950 | break; |
951 | case 's': |
952 | if ( suppress ) { |
953 | while ( !SDL_isspace((unsigned char) *text) ) { |
954 | ++text; |
955 | if ( count ) { |
956 | if ( --count == 0 ) { |
957 | break; |
958 | } |
959 | } |
960 | } |
961 | } else { |
962 | char *valuep = va_arg(ap, char*); |
963 | while ( !SDL_isspace((unsigned char) *text) ) { |
964 | *valuep++ = *text++; |
965 | if ( count ) { |
966 | if ( --count == 0 ) { |
967 | break; |
968 | } |
969 | } |
970 | } |
971 | *valuep = '\0'; |
972 | ++retval; |
973 | } |
974 | done = SDL_TRUE; |
975 | break; |
976 | default: |
977 | done = SDL_TRUE; |
978 | break; |
979 | } |
980 | ++fmt; |
981 | } |
982 | continue; |
983 | } |
984 | if ( *text == *fmt ) { |
985 | ++text; |
986 | ++fmt; |
987 | continue; |
988 | } |
989 | /* Text didn't match format specifier */ |
990 | break; |
991 | } |
992 | va_end(ap); |
993 | |
994 | return retval; |
995 | } |
996 | #endif |
997 | |
998 | #ifndef HAVE_SNPRINTF |
999 | int SDL_snprintf(char *text, size_t maxlen, const char *fmt, ...) |
1000 | { |
1001 | va_list ap; |
1002 | int retval; |
1003 | |
1004 | va_start(ap, fmt); |
1005 | retval = SDL_vsnprintf(text, maxlen, fmt, ap); |
1006 | va_end(ap); |
1007 | |
1008 | return retval; |
1009 | } |
1010 | #endif |
1011 | |
1012 | #ifndef HAVE_VSNPRINTF |
1013 | static size_t SDL_PrintLong(char *text, long value, int radix, size_t maxlen) |
1014 | { |
1015 | char num[130]; |
1016 | size_t size; |
1017 | |
1018 | SDL_ltoa(value, num, radix); |
1019 | size = SDL_strlen(num); |
1020 | if ( size >= maxlen ) { |
1021 | size = maxlen-1; |
1022 | } |
1023 | SDL_strlcpy(text, num, size+1); |
1024 | |
1025 | return size; |
1026 | } |
1027 | static size_t SDL_PrintUnsignedLong(char *text, unsigned long value, int radix, size_t maxlen) |
1028 | { |
1029 | char num[130]; |
1030 | size_t size; |
1031 | |
1032 | SDL_ultoa(value, num, radix); |
1033 | size = SDL_strlen(num); |
1034 | if ( size >= maxlen ) { |
1035 | size = maxlen-1; |
1036 | } |
1037 | SDL_strlcpy(text, num, size+1); |
1038 | |
1039 | return size; |
1040 | } |
1041 | #ifdef SDL_HAS_64BIT_TYPE |
1042 | static size_t SDL_PrintLongLong(char *text, Sint64 value, int radix, size_t maxlen) |
1043 | { |
1044 | char num[130]; |
1045 | size_t size; |
1046 | |
1047 | SDL_lltoa(value, num, radix); |
1048 | size = SDL_strlen(num); |
1049 | if ( size >= maxlen ) { |
1050 | size = maxlen-1; |
1051 | } |
1052 | SDL_strlcpy(text, num, size+1); |
1053 | |
1054 | return size; |
1055 | } |
1056 | static size_t SDL_PrintUnsignedLongLong(char *text, Uint64 value, int radix, size_t maxlen) |
1057 | { |
1058 | char num[130]; |
1059 | size_t size; |
1060 | |
1061 | SDL_ulltoa(value, num, radix); |
1062 | size = SDL_strlen(num); |
1063 | if ( size >= maxlen ) { |
1064 | size = maxlen-1; |
1065 | } |
1066 | SDL_strlcpy(text, num, size+1); |
1067 | |
1068 | return size; |
1069 | } |
1070 | #endif /* SDL_HAS_64BIT_TYPE */ |
1071 | static size_t SDL_PrintFloat(char *text, double arg, size_t maxlen) |
1072 | { |
1073 | char *textstart = text; |
1074 | if ( arg ) { |
1075 | /* This isn't especially accurate, but hey, it's easy. :) */ |
1076 | const double precision = 0.00000001; |
1077 | size_t len; |
1078 | unsigned long value; |
1079 | |
1080 | if ( arg < 0 ) { |
1081 | *text++ = '-'; |
1082 | --maxlen; |
1083 | arg = -arg; |
1084 | } |
1085 | value = (unsigned long)arg; |
1086 | len = SDL_PrintUnsignedLong(text, value, 10, maxlen); |
1087 | text += len; |
1088 | maxlen -= len; |
1089 | arg -= value; |
1090 | if ( arg > precision && maxlen ) { |
1091 | int mult = 10; |
1092 | *text++ = '.'; |
1093 | while ( (arg > precision) && maxlen ) { |
1094 | value = (unsigned long)(arg * mult); |
1095 | len = SDL_PrintUnsignedLong(text, value, 10, maxlen); |
1096 | text += len; |
1097 | maxlen -= len; |
1098 | arg -= (double)value / mult; |
1099 | mult *= 10; |
1100 | } |
1101 | } |
1102 | } else { |
1103 | *text++ = '0'; |
1104 | } |
1105 | return (text - textstart); |
1106 | } |
1107 | static size_t SDL_PrintString(char *text, const char *string, size_t maxlen) |
1108 | { |
1109 | char *textstart = text; |
1110 | while ( *string && maxlen-- ) { |
1111 | *text++ = *string++; |
1112 | } |
1113 | return (text - textstart); |
1114 | } |
1115 | int SDL_vsnprintf(char *text, size_t maxlen, const char *fmt, va_list ap) |
1116 | { |
1117 | char *textstart = text; |
1118 | if ( maxlen <= 0 ) { |
1119 | return 0; |
1120 | } |
1121 | --maxlen; /* For the trailing '\0' */ |
1122 | while ( *fmt && maxlen ) { |
1123 | if ( *fmt == '%' ) { |
1124 | SDL_bool done = SDL_FALSE; |
1125 | size_t len = 0; |
1126 | SDL_bool do_lowercase = SDL_FALSE; |
1127 | int radix = 10; |
1128 | enum { |
1129 | DO_INT, |
1130 | DO_LONG, |
1131 | DO_LONGLONG |
1132 | } inttype = DO_INT; |
1133 | |
1134 | ++fmt; |
1135 | /* FIXME: implement more of the format specifiers */ |
1136 | while ( *fmt == '.' || (*fmt >= '0' && *fmt <= '9') ) { |
1137 | ++fmt; |
1138 | } |
1139 | while (!done) { |
1140 | switch(*fmt) { |
1141 | case '%': |
1142 | *text = '%'; |
1143 | len = 1; |
1144 | done = SDL_TRUE; |
1145 | break; |
1146 | case 'c': |
1147 | /* char is promoted to int when passed through (...) */ |
1148 | *text = (char)va_arg(ap, int); |
1149 | len = 1; |
1150 | done = SDL_TRUE; |
1151 | break; |
1152 | case 'h': |
1153 | /* short is promoted to int when passed through (...) */ |
1154 | break; |
1155 | case 'l': |
1156 | if ( inttype < DO_LONGLONG ) { |
1157 | ++inttype; |
1158 | } |
1159 | break; |
1160 | case 'I': |
1161 | if ( SDL_strncmp(fmt, "I64", 3) == 0 ) { |
1162 | fmt += 2; |
1163 | inttype = DO_LONGLONG; |
1164 | } |
1165 | break; |
1166 | case 'i': |
1167 | case 'd': |
1168 | switch (inttype) { |
1169 | case DO_INT: |
1170 | len = SDL_PrintLong(text, (long)va_arg(ap, int), radix, maxlen); |
1171 | break; |
1172 | case DO_LONG: |
1173 | len = SDL_PrintLong(text, va_arg(ap, long), radix, maxlen); |
1174 | break; |
1175 | case DO_LONGLONG: |
1176 | #ifdef SDL_HAS_64BIT_TYPE |
1177 | len = SDL_PrintLongLong(text, va_arg(ap, Sint64), radix, maxlen); |
1178 | #else |
1179 | len = SDL_PrintLong(text, va_arg(ap, long), radix, maxlen); |
1180 | #endif |
1181 | break; |
1182 | } |
1183 | done = SDL_TRUE; |
1184 | break; |
1185 | case 'p': |
1186 | case 'x': |
1187 | do_lowercase = SDL_TRUE; |
1188 | /* Fall through to 'X' handling */ |
1189 | case 'X': |
1190 | if ( radix == 10 ) { |
1191 | radix = 16; |
1192 | } |
1193 | if ( *fmt == 'p' ) { |
1194 | inttype = DO_LONG; |
1195 | } |
1196 | /* Fall through to unsigned handling */ |
1197 | case 'o': |
1198 | if ( radix == 10 ) { |
1199 | radix = 8; |
1200 | } |
1201 | /* Fall through to unsigned handling */ |
1202 | case 'u': |
1203 | switch (inttype) { |
1204 | case DO_INT: |
1205 | len = SDL_PrintUnsignedLong(text, (unsigned long)va_arg(ap, unsigned int), radix, maxlen); |
1206 | break; |
1207 | case DO_LONG: |
1208 | len = SDL_PrintUnsignedLong(text, va_arg(ap, unsigned long), radix, maxlen); |
1209 | break; |
1210 | case DO_LONGLONG: |
1211 | #ifdef SDL_HAS_64BIT_TYPE |
1212 | len = SDL_PrintUnsignedLongLong(text, va_arg(ap, Uint64), radix, maxlen); |
1213 | #else |
1214 | len = SDL_PrintUnsignedLong(text, va_arg(ap, unsigned long), radix, maxlen); |
1215 | #endif |
1216 | break; |
1217 | } |
1218 | if ( do_lowercase ) { |
1219 | SDL_strlwr(text); |
1220 | } |
1221 | done = SDL_TRUE; |
1222 | break; |
1223 | case 'f': |
1224 | len = SDL_PrintFloat(text, va_arg(ap, double), maxlen); |
1225 | done = SDL_TRUE; |
1226 | break; |
1227 | case 's': |
1228 | len = SDL_PrintString(text, va_arg(ap, char*), maxlen); |
1229 | done = SDL_TRUE; |
1230 | break; |
1231 | default: |
1232 | done = SDL_TRUE; |
1233 | break; |
1234 | } |
1235 | ++fmt; |
1236 | } |
1237 | text += len; |
1238 | maxlen -= len; |
1239 | } else { |
1240 | *text++ = *fmt++; |
1241 | --maxlen; |
1242 | } |
1243 | } |
1244 | *text = '\0'; |
1245 | |
1246 | return (text - textstart); |
1247 | } |
1248 | #endif |