module/lua/lctype.h

   1 /*
   2 ** $Id: lctype.h,v 1.12.1.1 2013/04/12 18:48:47 roberto Exp $
   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 <sys/lua/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 "llimits.h"
  35
  36
  37 #define ALPHABIT        0
  38 #define DIGITBIT        1
  39 #define PRINTBIT        2
  40 #define SPACEBIT        3
  41 #define XDIGITBIT       4
  42
  43
  44 #define MASK(B)         (1 << (B))
  45
  46
  47 /*
  48 ** add 1 to char to allow index -1 (EOZ)
  49 */
  50 #define testprop(c,p)   (luai_ctype_[(lu_byte)(c)+1] & (p))
  51
  52 /*
  53 ** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_'
  54 */
  55 #define lislalpha(c)    testprop(c, MASK(ALPHABIT))
  56 #define lislalnum(c)    testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT)))
  57 #define lisdigit(c)     testprop(c, MASK(DIGITBIT))
  58 #define lisspace(c)     testprop(c, MASK(SPACEBIT))
  59 #define lisprint(c)     testprop(c, MASK(PRINTBIT))
  60 #define lisxdigit(c)    testprop(c, MASK(XDIGITBIT))
  61
  62 /*
  63 ** this 'ltolower' only works for alphabetic characters
  64 */
  65 #define ltolower(c)     ((c) | ('A' ^ 'a'))
  66
  67
  68 /* two more entries for 0 and -1 (EOZ) */
  69 LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2];
  70
  71
  72 #else                   /* }{ */
  73
  74 /*
  75 ** use standard C ctypes
  76 */
  77
  78 #include <ctype.h>
  79
  80
  81 #define lislalpha(c)    (isalpha(c) || (c) == '_')
  82 #define lislalnum(c)    (isalnum(c) || (c) == '_')
  83 #define lisdigit(c)     (isdigit(c))
  84 #define lisspace(c)     (isspace(c))
  85 #define lisprint(c)     (isprint(c))
  86 #define lisxdigit(c)    (isxdigit(c))
  87
  88 #define ltolower(c)     (tolower(c))
  89
  90 #endif                  /* } */
  91
  92 #endif