1 /* BEGIN CSTYLED */ 2 /* 3 ** $Id: lctype.h,v 1.12.1.1 2013/04/12 18:48:47 roberto Exp $ 4 ** 'ctype' functions for Lua 5 ** See Copyright Notice in lua.h 6 */ 7 8 #ifndef lctype_h 9 #define lctype_h 10 11 #include <sys/lua/lua.h> 12 13 14 /* 15 ** WARNING: the functions defined here do not necessarily correspond 16 ** to the similar functions in the standard C ctype.h. They are 17 ** optimized for the specific needs of Lua 18 */ 19 20 #if !defined(LUA_USE_CTYPE) 21 22 #if 'A' == 65 && '0' == 48 23 /* ASCII case: can use its own tables; faster and fixed */ 24 #define LUA_USE_CTYPE 0 25 #else 26 /* must use standard C ctype */ 27 #define LUA_USE_CTYPE 1 28 #endif 29 30 #endif 31 32 33 #if !LUA_USE_CTYPE /* { */ 34 35 #include "llimits.h" 36 37 38 #define ALPHABIT 0 39 #define DIGITBIT 1 40 #define PRINTBIT 2 41 #define SPACEBIT 3 42 #define XDIGITBIT 4 43 44 45 #define MASK(B) (1 << (B)) 46 47 48 /* 49 ** add 1 to char to allow index -1 (EOZ) 50 */ 51 #define testprop(c,p) (luai_ctype_[(lu_byte)(c)+1] & (p)) 52 53 /* 54 ** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_' 55 */ 56 #define lislalpha(c) testprop(c, MASK(ALPHABIT)) 57 #define lislalnum(c) testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT))) 58 #define lisdigit(c) testprop(c, MASK(DIGITBIT)) 59 #define lisspace(c) testprop(c, MASK(SPACEBIT)) 60 #define lisprint(c) testprop(c, MASK(PRINTBIT)) 61 #define lisxdigit(c) testprop(c, MASK(XDIGITBIT)) 62 63 /* 64 ** this 'ltolower' only works for alphabetic characters 65 */ 66 #define ltolower(c) ((c) | ('A' ^ 'a')) 67 68 69 /* two more entries for 0 and -1 (EOZ) */ 70 LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2]; 71 72 73 #else /* }{ */ 74 75 /* 76 ** use standard C ctypes 77 */ 78 79 #include <ctype.h> 80 81 82 #define lislalpha(c) (isalpha(c) || (c) == '_') 83 #define lislalnum(c) (isalnum(c) || (c) == '_') 84 #define lisdigit(c) (isdigit(c)) 85 #define lisspace(c) (isspace(c)) 86 #define lisprint(c) (isprint(c)) 87 #define lisxdigit(c) (isxdigit(c)) 88 89 #define ltolower(c) (tolower(c)) 90 91 #endif /* } */ 92 93 #endif 94 /* END CSTYLED */ 95