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| 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 |
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