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Commit	Line	Data
	1	/*
	2	** $Id: lctype.h,v 1.12 2011/07/15 12:50:29 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 <limits.h>
	35
	36	#include "llimits.h"
	37
	38
	39	#define ALPHABIT 0
	40	#define DIGITBIT 1
	41	#define PRINTBIT 2
	42	#define SPACEBIT 3
	43	#define XDIGITBIT 4
	44
	45
	46	#define MASK(B) (1 << (B))
	47
	48
	49	/*
	50	** add 1 to char to allow index -1 (EOZ)
	51	*/
	52	#define testprop(c,p) (luai_ctype_[(c)+1] & (p))
	53
	54	/*
	55	** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_'
	56	*/
	57	#define lislalpha(c) testprop(c, MASK(ALPHABIT))
	58	#define lislalnum(c) testprop(c, (MASK(ALPHABIT) \| MASK(DIGITBIT)))
	59	#define lisdigit(c) testprop(c, MASK(DIGITBIT))
	60	#define lisspace(c) testprop(c, MASK(SPACEBIT))
	61	#define lisprint(c) testprop(c, MASK(PRINTBIT))
	62	#define lisxdigit(c) testprop(c, MASK(XDIGITBIT))
	63
	64	/*
	65	** this 'ltolower' only works for alphabetic characters
	66	*/
	67	#define ltolower(c) ((c) \| ('A' ^ 'a'))
	68
	69
	70	/* two more entries for 0 and -1 (EOZ) */
	71	LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2];
	72
	73
	74	#else /* }{ */
	75
	76	/*
	77	** use standard C ctypes
	78	*/
	79
	80	#include <ctype.h>
	81
	82
	83	#define lislalpha(c) (isalpha(c) \|\| (c) == '_')
	84	#define lislalnum(c) (isalnum(c) \|\| (c) == '_')
	85	#define lisdigit(c) (isdigit(c))
	86	#define lisspace(c) (isspace(c))
	87	#define lisprint(c) (isprint(c))
	88	#define lisxdigit(c) (isxdigit(c))
	89
	90	#define ltolower(c) (tolower(c))
	91
	92	#endif /* } */
	93
	94	#endif
	95