/*

** $Id: lctype.h,v 1.12.1.1 2013/04/12 18:48:47 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