| 1 | /* |
| 2 | ** $Id: lctype.h,v 1.12 2011/07/15 12:50:29 roberto Exp $ |
| 3 | ** 'ctype' functions for Lua |
| 4 | ** See Copyright Notice in lua.h |
| 5 | */ |
| 6 | |
| 7 | #ifndef lctype_h |
| 8 | #define lctype_h |
| 9 | |
| 10 | #include "lua.h" |
| 11 | |
| 12 | |
| 13 | /* |
| 14 | ** WARNING: the functions defined here do not necessarily correspond |
| 15 | ** to the similar functions in the standard C ctype.h. They are |
| 16 | ** optimized for the specific needs of Lua |
| 17 | */ |
| 18 | |
| 19 | #if !defined(LUA_USE_CTYPE) |
| 20 | |
| 21 | #if 'A' == 65 && '0' == 48 |
| 22 | /* ASCII case: can use its own tables; faster and fixed */ |
| 23 | #define LUA_USE_CTYPE 0 |
| 24 | #else |
| 25 | /* must use standard C ctype */ |
| 26 | #define LUA_USE_CTYPE 1 |
| 27 | #endif |
| 28 | |
| 29 | #endif |
| 30 | |
| 31 | |
| 32 | #if !LUA_USE_CTYPE /* { */ |
| 33 | |
| 34 | #include <limits.h> |
| 35 | |
| 36 | #include "llimits.h" |
| 37 | |
| 38 | |
| 39 | #define ALPHABIT 0 |
| 40 | #define DIGITBIT 1 |
| 41 | #define PRINTBIT 2 |
| 42 | #define SPACEBIT 3 |
| 43 | #define XDIGITBIT 4 |
| 44 | |
| 45 | |
| 46 | #define MASK(B) (1 << (B)) |
| 47 | |
| 48 | |
| 49 | /* |
| 50 | ** add 1 to char to allow index -1 (EOZ) |
| 51 | */ |
| 52 | #define testprop(c,p) (luai_ctype_[(c)+1] & (p)) |
| 53 | |
| 54 | /* |
| 55 | ** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_' |
| 56 | */ |
| 57 | #define lislalpha(c) testprop(c, MASK(ALPHABIT)) |
| 58 | #define lislalnum(c) testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT))) |
| 59 | #define lisdigit(c) testprop(c, MASK(DIGITBIT)) |
| 60 | #define lisspace(c) testprop(c, MASK(SPACEBIT)) |
| 61 | #define lisprint(c) testprop(c, MASK(PRINTBIT)) |
| 62 | #define lisxdigit(c) testprop(c, MASK(XDIGITBIT)) |
| 63 | |
| 64 | /* |
| 65 | ** this 'ltolower' only works for alphabetic characters |
| 66 | */ |
| 67 | #define ltolower(c) ((c) | ('A' ^ 'a')) |
| 68 | |
| 69 | |
| 70 | /* two more entries for 0 and -1 (EOZ) */ |
| 71 | LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2]; |
| 72 | |
| 73 | |
| 74 | #else /* }{ */ |
| 75 | |
| 76 | /* |
| 77 | ** use standard C ctypes |
| 78 | */ |
| 79 | |
| 80 | #include <ctype.h> |
| 81 | |
| 82 | |
| 83 | #define lislalpha(c) (isalpha(c) || (c) == '_') |
| 84 | #define lislalnum(c) (isalnum(c) || (c) == '_') |
| 85 | #define lisdigit(c) (isdigit(c)) |
| 86 | #define lisspace(c) (isspace(c)) |
| 87 | #define lisprint(c) (isprint(c)) |
| 88 | #define lisxdigit(c) (isxdigit(c)) |
| 89 | |
| 90 | #define ltolower(c) (tolower(c)) |
| 91 | |
| 92 | #endif /* } */ |
| 93 | |
| 94 | #endif |
| 95 | |