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- /*
- ** $Id: lctype.h,v 1.12 2011/07/15 12:50:29 roberto Exp $
- ** 'ctype' functions for Lua
- ** See Copyright Notice in lua.h
- */
- #ifndef lctype_h
- #define lctype_h
- #include "lua.h"
- /*
- ** WARNING: the functions defined here do not necessarily correspond
- ** to the similar functions in the standard C ctype.h. They are
- ** optimized for the specific needs of Lua
- */
- #if !defined(LUA_USE_CTYPE)
- #if 'A' == 65 && '0' == 48
- /* ASCII case: can use its own tables; faster and fixed */
- #define LUA_USE_CTYPE 0
- #else
- /* must use standard C ctype */
- #define LUA_USE_CTYPE 1
- #endif
- #endif
- #if !LUA_USE_CTYPE /* { */
- #include <limits.h>
- #include "llimits.h"
- #define ALPHABIT 0
- #define DIGITBIT 1
- #define PRINTBIT 2
- #define SPACEBIT 3
- #define XDIGITBIT 4
- #define MASK(B) (1 << (B))
- /*
- ** add 1 to char to allow index -1 (EOZ)
- */
- #define testprop(c,p) (luai_ctype_[(c)+1] & (p))
- /*
- ** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_'
- */
- #define lislalpha(c) testprop(c, MASK(ALPHABIT))
- #define lislalnum(c) testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT)))
- #define lisdigit(c) testprop(c, MASK(DIGITBIT))
- #define lisspace(c) testprop(c, MASK(SPACEBIT))
- #define lisprint(c) testprop(c, MASK(PRINTBIT))
- #define lisxdigit(c) testprop(c, MASK(XDIGITBIT))
- /*
- ** this 'ltolower' only works for alphabetic characters
- */
- #define ltolower(c) ((c) | ('A' ^ 'a'))
- /* two more entries for 0 and -1 (EOZ) */
- LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2];
- #else /* }{ */
- /*
- ** use standard C ctypes
- */
- #include <ctype.h>
- #define lislalpha(c) (isalpha(c) || (c) == '_')
- #define lislalnum(c) (isalnum(c) || (c) == '_')
- #define lisdigit(c) (isdigit(c))
- #define lisspace(c) (isspace(c))
- #define lisprint(c) (isprint(c))
- #define lisxdigit(c) (isxdigit(c))
- #define ltolower(c) (tolower(c))
- #endif /* } */
- #endif
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