The Battle for Wesnoth  1.15.12+dev
lctype.h
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1 /*
2 ** $Id: lctype.h $
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 /*
66 ** In ASCII, this 'ltolower' is correct for alphabetic characters and
67 ** for '.'. That is enough for Lua needs. ('check_exp' ensures that
68 ** the character either is an upper-case letter or is unchanged by
69 ** the transformation, which holds for lower-case letters and '.'.)
70 */
71 #define ltolower(c) \
72  check_exp(('A' <= (c) && (c) <= 'Z') || (c) == ((c) | ('A' ^ 'a')), \
73  (c) | ('A' ^ 'a'))
74 
75 
76 /* one entry for each character and for -1 (EOZ) */
77 LUAI_DDEC(const lu_byte luai_ctype_[UCHAR_MAX + 2];)
78 
79 
80 #else /* }{ */
81 
82 /*
83 ** use standard C ctypes
84 */
85 
86 #include <ctype.h>
87 
88 
89 #define lislalpha(c) (isalpha(c) || (c) == '_')
90 #define lislalnum(c) (isalnum(c) || (c) == '_')
91 #define lisdigit(c) (isdigit(c))
92 #define lisspace(c) (isspace(c))
93 #define lisprint(c) (isprint(c))
94 #define lisxdigit(c) (isxdigit(c))
95 
96 #define ltolower(c) (tolower(c))
97 
98 #endif /* } */
99 
100 #endif
101 
unsigned char lu_byte
Definition: llimits.h:36
#define LUAI_DDEC(dec)
Definition: luaconf.h:310
#define lislalpha(c)
Definition: lctype.h:89
mock_char c