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/*
** $Id: lctype.h,v 1.8 2009/11/19 19:06:52 roberto Exp roberto $
** 'ctype' functions for Lua
** See Copyright Notice in lua.h
*/
#ifndef lctype_h
#define lctype_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
*/
#include <limits.h>
#include "lua.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 'ltoupper' only works for alphabetic characters
*/
#define ltoupper(c) ((c) & ~32)
/* one more entry for 0 and one more for -1 (EOZ) */
LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2];
#endif
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