1/* BEGIN CSTYLED */
2/*
3** $Id: lctype.h,v 1.12.1.1 2013/04/12 18:48:47 roberto Exp $
4** 'ctype' functions for Lua
5** See Copyright Notice in lua.h
6*/
7
8#ifndef lctype_h
9#define lctype_h
10
11#include <sys/lua/lua.h>
12
13
14/*
15** WARNING: the functions defined here do not necessarily correspond
16** to the similar functions in the standard C ctype.h. They are
17** optimized for the specific needs of Lua
18*/
19
20#if !defined(LUA_USE_CTYPE)
21
22#if 'A' == 65 && '0' == 48
23/* ASCII case: can use its own tables; faster and fixed */
24#define LUA_USE_CTYPE	0
25#else
26/* must use standard C ctype */
27#define LUA_USE_CTYPE	1
28#endif
29
30#endif
31
32
33#if !LUA_USE_CTYPE	/* { */
34
35#include "llimits.h"
36
37
38#define ALPHABIT	0
39#define DIGITBIT	1
40#define PRINTBIT	2
41#define SPACEBIT	3
42#define XDIGITBIT	4
43
44
45#define MASK(B)		(1 << (B))
46
47
48/*
49** add 1 to char to allow index -1 (EOZ)
50*/
51#define testprop(c,p)	(luai_ctype_[(lu_byte)(c)+1] & (p))
52
53/*
54** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_'
55*/
56#define lislalpha(c)	testprop(c, MASK(ALPHABIT))
57#define lislalnum(c)	testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT)))
58#define lisdigit(c)	testprop(c, MASK(DIGITBIT))
59#define lisspace(c)	testprop(c, MASK(SPACEBIT))
60#define lisprint(c)	testprop(c, MASK(PRINTBIT))
61#define lisxdigit(c)	testprop(c, MASK(XDIGITBIT))
62
63/*
64** this 'ltolower' only works for alphabetic characters
65*/
66#define ltolower(c)	((c) | ('A' ^ 'a'))
67
68
69/* two more entries for 0 and -1 (EOZ) */
70LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2];
71
72
73#else			/* }{ */
74
75/*
76** use standard C ctypes
77*/
78
79#include <ctype.h>
80
81
82#define lislalpha(c)	(isalpha(c) || (c) == '_')
83#define lislalnum(c)	(isalnum(c) || (c) == '_')
84#define lisdigit(c)	(isdigit(c))
85#define lisspace(c)	(isspace(c))
86#define lisprint(c)	(isprint(c))
87#define lisxdigit(c)	(isxdigit(c))
88
89#define ltolower(c)	(tolower(c))
90
91#endif			/* } */
92
93#endif
94/* END CSTYLED */
95