1 /* $NetBSD: lctype.h,v 1.8 2023/04/16 20:46:17 nikita Exp $ */ 2 3 /* 4 ** Id: lctype.h 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 /* _KERNEL */ 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 /* 70 ** In ASCII, this 'ltolower' is correct for alphabetic characters and 71 ** for '.'. That is enough for Lua needs. ('check_exp' ensures that 72 ** the character either is an upper-case letter or is unchanged by 73 ** the transformation, which holds for lower-case letters and '.'.) 74 */ 75 #define ltolower(c) \ 76 check_exp(('A' <= (c) && (c) <= 'Z') || (c) == ((c) | ('A' ^ 'a')), \ 77 (c) | ('A' ^ 'a')) 78 79 80 /* one entry for each character and for -1 (EOZ) */ 81 LUAI_DDEC(const lu_byte luai_ctype_[UCHAR_MAX + 2];) 82 83 84 #else /* }{ */ 85 86 /* 87 ** use standard C ctypes 88 */ 89 90 #include <ctype.h> 91 92 93 #define lislalpha(c) (isalpha(c) || (c) == '_') 94 #define lislalnum(c) (isalnum(c) || (c) == '_') 95 #define lisdigit(c) (isdigit(c)) 96 #define lisspace(c) (isspace(c)) 97 #define lisprint(c) (isprint(c)) 98 #define lisxdigit(c) (isxdigit(c)) 99 100 #define ltolower(c) (tolower(c)) 101 102 #endif /* } */ 103 104 #endif 105 106