123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101 |
- /*
- ** $Id: lctype.h $
- ** '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))
- /*
- ** In ASCII, this 'ltolower' is correct for alphabetic characters and
- ** for '.'. That is enough for Lua needs. ('check_exp' ensures that
- ** the character either is an upper-case letter or is unchanged by
- ** the transformation, which holds for lower-case letters and '.'.)
- */
- #define ltolower(c) \
- check_exp(('A' <= (c) && (c) <= 'Z') || (c) == ((c) | ('A' ^ 'a')), \
- (c) | ('A' ^ 'a'))
- /* one entry for each character and for -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
|