Mercurial > sdl-ios-xcode
comparison src/stdlib/SDL_string.c @ 4754:2072fed2f583
Added SDL_utf8strlcpy to copy at UTF-8 character boundaries.
Changed SDL_SendKeyboardText and SDL_SendEditingText to use SDL_utf8strlcpy.
| author | dewyatt |
|---|---|
| date | Tue, 13 Jul 2010 15:05:45 -0400 |
| parents | f7b03b6838cb |
| children | e2f4e31b41fc |
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| 4753:11b0a6a3eb4d | 4754:2072fed2f583 |
|---|---|
| 26 #include "SDL_stdinc.h" | 26 #include "SDL_stdinc.h" |
| 27 | 27 |
| 28 | 28 |
| 29 #define SDL_isupperhex(X) (((X) >= 'A') && ((X) <= 'F')) | 29 #define SDL_isupperhex(X) (((X) >= 'A') && ((X) <= 'F')) |
| 30 #define SDL_islowerhex(X) (((X) >= 'a') && ((X) <= 'f')) | 30 #define SDL_islowerhex(X) (((X) >= 'a') && ((X) <= 'f')) |
| 31 | |
| 32 #define UTF8_IsLeadByte(c) ((c) >= 0xC0 && (c) <= 0xF4) | |
| 33 #define UTF8_IsTrailingByte(c) ((c) >= 0x80 && (c) <= 0xBF) | |
| 34 | |
| 35 int UTF8_TrailingBytes(unsigned char c) | |
| 36 { | |
| 37 if (c >= 0xC0 && c<= 0xDF) | |
| 38 return 1; | |
| 39 else if (c >= 0xE0 && c <= 0xEF) | |
| 40 return 2; | |
| 41 else if (c >= 0xF0 && c <= 0xF4) | |
| 42 return 3; | |
| 43 else | |
| 44 return 0; | |
| 45 } | |
| 31 | 46 |
| 32 #if !defined(HAVE_SSCANF) || !defined(HAVE_STRTOL) | 47 #if !defined(HAVE_SSCANF) || !defined(HAVE_STRTOL) |
| 33 static size_t | 48 static size_t |
| 34 SDL_ScanLong(const char *text, int radix, long *valuep) | 49 SDL_ScanLong(const char *text, int radix, long *valuep) |
| 35 { | 50 { |
| 359 dst[len] = '\0'; | 374 dst[len] = '\0'; |
| 360 } | 375 } |
| 361 return srclen; | 376 return srclen; |
| 362 } | 377 } |
| 363 #endif | 378 #endif |
| 379 | |
| 380 size_t SDL_utf8strlcpy(char *dst, const char *src, size_t dst_bytes) | |
| 381 { | |
| 382 size_t src_bytes = SDL_strlen(src); | |
| 383 size_t bytes = SDL_min(src_bytes, dst_bytes - 1); | |
| 384 int i = 0; | |
| 385 char trailing_bytes = 0; | |
| 386 if (bytes) | |
| 387 { | |
| 388 unsigned char c = (unsigned char)src[bytes - 1]; | |
| 389 if (UTF8_IsLeadByte(c)) | |
| 390 --bytes; | |
| 391 else if (UTF8_IsTrailingByte(c)) | |
| 392 { | |
| 393 for (i = bytes - 1; i != 0; --i) | |
| 394 { | |
| 395 c = (unsigned char)src[i]; | |
| 396 trailing_bytes = UTF8_TrailingBytes(c); | |
| 397 if (trailing_bytes) | |
| 398 { | |
| 399 if (bytes - i != trailing_bytes + 1) | |
| 400 bytes = i; | |
| 401 | |
| 402 break; | |
| 403 } | |
| 404 } | |
| 405 } | |
| 406 SDL_memcpy(dst, src, bytes); | |
| 407 } | |
| 408 dst[bytes] = '\0'; | |
| 409 return bytes; | |
| 410 } | |
| 364 | 411 |
| 365 #ifndef HAVE_STRLCAT | 412 #ifndef HAVE_STRLCAT |
| 366 size_t | 413 size_t |
| 367 SDL_strlcat(char *dst, const char *src, size_t maxlen) | 414 SDL_strlcat(char *dst, const char *src, size_t maxlen) |
| 368 { | 415 { |