The Battle for Wesnoth  1.15.2+dev
lctype.h
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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 <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 
#define LUAI_DDEC
Definition: luaconf.h:285
unsigned char lu_byte
Definition: llimits.h:35