/*** $Id: lctype.h,v 1.12 2011/07/15 12:50:29 roberto Exp $** 'ctype' functions for Lua** See Copyright Notice in lua.h*/ #ifndef lctype_h#define lctype_h #include "lua.h"  /*** WARNING: the functions defined here do not necessarily correspond** to the similar functions in the standard C ctype.h. They are** optimized for the specific needs of Lua*/ #if !defined(LUA_USE_CTYPE) #if 'A' == 65 && '0' == 48/* ASCII case: can use its own tables; faster and fixed */#define LUA_USE_CTYPE	0#else/* must use standard C ctype */#define LUA_USE_CTYPE	1#endif #endif  #if !LUA_USE_CTYPE	/* { */ #include <limits.h> #include "llimits.h"  #define ALPHABIT	0#define DIGITBIT	1#define PRINTBIT	2#define SPACEBIT	3#define XDIGITBIT	4  #define MASK(B)		(1 << (B))  /*** add 1 to char to allow index -1 (EOZ)*/#define testprop(c,p)	(luai_ctype_[(c)+1] & (p)) /*** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_'*/#define lislalpha(c)	testprop(c, MASK(ALPHABIT))#define lislalnum(c)	testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT)))#define lisdigit(c)	testprop(c, MASK(DIGITBIT))#define lisspace(c)	testprop(c, MASK(SPACEBIT))#define lisprint(c)	testprop(c, MASK(PRINTBIT))#define lisxdigit(c)	testprop(c, MASK(XDIGITBIT)) /*** this 'ltolower' only works for alphabetic characters*/#define ltolower(c)	((c) | ('A' ^ 'a'))  /* two more entries for 0 and -1 (EOZ) */LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2];  #else			/* }{ */ /*** use standard C ctypes*/ #include <ctype.h>  #define lislalpha(c)	(isalpha(c) || (c) == '_')#define lislalnum(c)	(isalnum(c) || (c) == '_')#define lisdigit(c)	(isdigit(c))#define lisspace(c)	(isspace(c))#define lisprint(c)	(isprint(c))#define lisxdigit(c)	(isxdigit(c)) #define ltolower(c)	(tolower(c)) #endif			/* } */ #endif