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) */ 81LUAI_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