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