| 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 |