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 "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_[(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) */ 69LUAI_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 94