1 /* 2 ** $Id: lctype.h,v 1.12.1.1 2013/04/12 18:48:47 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 <sys/lua/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 "llimits.h" 35 36 37 #define ALPHABIT 0 38 #define DIGITBIT 1 39 #define PRINTBIT 2 40 #define SPACEBIT 3 41 #define XDIGITBIT 4 42 43 44 #define MASK(B) (1 << (B)) 45 46 47 /* 48 ** add 1 to char to allow index -1 (EOZ) 49 */ 50 #define testprop(c,p) (luai_ctype_[(lu_byte)(c)+1] & (p)) 51 52 /* 53 ** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_' 54 */ 55 #define lislalpha(c) testprop(c, MASK(ALPHABIT)) 56 #define lislalnum(c) testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT))) 57 #define lisdigit(c) testprop(c, MASK(DIGITBIT)) 58 #define lisspace(c) testprop(c, MASK(SPACEBIT)) 59 #define lisprint(c) testprop(c, MASK(PRINTBIT)) 60 #define lisxdigit(c) testprop(c, MASK(XDIGITBIT)) 61 62 /* 63 ** this 'ltolower' only works for alphabetic characters 64 */ 65 #define ltolower(c) ((c) | ('A' ^ 'a')) 66 67 68 /* two more entries for 0 and -1 (EOZ) */ 69 LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2]; 70 71 72 #else /* }{ */ 73 74 /* 75 ** use standard C ctypes 76 */ 77 78 #include <ctype.h> 79 80 81 #define lislalpha(c) (isalpha(c) || (c) == '_') 82 #define lislalnum(c) (isalnum(c) || (c) == '_') 83 #define lisdigit(c) (isdigit(c)) 84 #define lisspace(c) (isspace(c)) 85 #define lisprint(c) (isprint(c)) 86 #define lisxdigit(c) (isxdigit(c)) 87 88 #define ltolower(c) (tolower(c)) 89 90 #endif /* } */ 91 92 #endif 93