lctype.h revision 1.2 
1/*	$NetBSD: lctype.h,v 1.2 2015/02/02 14:03:05 lneto Exp $	*/
2
3/*
4** Id: lctype.h,v 1.12 2011/07/15 12:50:29 roberto Exp
5** 'ctype' functions for Lua
6** See Copyright Notice in lua.h
7*/
8
9#ifndef lctype_h
10#define lctype_h
11
12#include "lua.h"
13
14
15/*
16** WARNING: the functions defined here do not necessarily correspond
17** to the similar functions in the standard C ctype.h. They are
18** optimized for the specific needs of Lua
19*/
20
21#if !defined(LUA_USE_CTYPE)
22
23#if 'A' == 65 && '0' == 48
24/* ASCII case: can use its own tables; faster and fixed */
25#define LUA_USE_CTYPE	0
26#else
27/* must use standard C ctype */
28#define LUA_USE_CTYPE	1
29#endif
30
31#endif
32
33
34#if !LUA_USE_CTYPE	/* { */
35
36#ifndef _KERNEL
37#include <limits.h>
38#endif
39
40#include "llimits.h"
41
42
43#define ALPHABIT	0
44#define DIGITBIT	1
45#define PRINTBIT	2
46#define SPACEBIT	3
47#define XDIGITBIT	4
48
49
50#define MASK(B)		(1 << (B))
51
52
53/*
54** add 1 to char to allow index -1 (EOZ)
55*/
56#define testprop(c,p)	(luai_ctype_[(c)+1] & (p))
57
58/*
59** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_'
60*/
61#define lislalpha(c)	testprop(c, MASK(ALPHABIT))
62#define lislalnum(c)	testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT)))
63#define lisdigit(c)	testprop(c, MASK(DIGITBIT))
64#define lisspace(c)	testprop(c, MASK(SPACEBIT))
65#define lisprint(c)	testprop(c, MASK(PRINTBIT))
66#define lisxdigit(c)	testprop(c, MASK(XDIGITBIT))
67
68/*
69** this 'ltolower' only works for alphabetic characters
70*/
71#define ltolower(c)	((c) | ('A' ^ 'a'))
72
73
74/* two more entries for 0 and -1 (EOZ) */
75LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2];
76
77
78#else			/* }{ */
79
80/*
81** use standard C ctypes
82*/
83
84#include <ctype.h>
85
86
87#define lislalpha(c)	(isalpha(c) || (c) == '_')
88#define lislalnum(c)	(isalnum(c) || (c) == '_')
89#define lisdigit(c)	(isdigit(c))
90#define lisspace(c)	(isspace(c))
91#define lisprint(c)	(isprint(c))
92#define lisxdigit(c)	(isxdigit(c))
93
94#define ltolower(c)	(tolower(c))
95
96#endif			/* } */
97
98#endif
99
100