sane-ctype.h

   1 #ifndef SANE_CTYPE_H
   2 #define SANE_CTYPE_H
   3
   4 /*
   5  * Explicitly include <ctype.h> so that its header guards kick in from here on.
   6  * This ensures that the file won't get included after "sane-ctype.h", as that
   7  * would otherwise lead to a compiler error because the function declarations
   8  * for `int isascii(int c)` et al would be mangled by our macros with the same
   9  * name.
  10  */
  11 #include <ctype.h>
  12
  13 /* Sane ctype - no locale, and works with signed chars */
  14 #undef isascii
  15 #undef isspace
  16 #undef isdigit
  17 #undef isalpha
  18 #undef isalnum
  19 #undef isprint
  20 #undef islower
  21 #undef isupper
  22 #undef tolower
  23 #undef toupper
  24 #undef iscntrl
  25 #undef ispunct
  26 #undef isxdigit
  27
  28 extern const unsigned char sane_ctype[256];
  29 extern const signed char hexval_table[256];
  30 #define GIT_SPACE 0x01
  31 #define GIT_DIGIT 0x02
  32 #define GIT_ALPHA 0x04
  33 #define GIT_GLOB_SPECIAL 0x08
  34 #define GIT_REGEX_SPECIAL 0x10
  35 #define GIT_PATHSPEC_MAGIC 0x20
  36 #define GIT_CNTRL 0x40
  37 #define GIT_PUNCT 0x80
  38 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
  39 #define isascii(x) (((x) & ~0x7f) == 0)
  40 #define isspace(x) sane_istest(x,GIT_SPACE)
  41 #define isdigit(x) sane_istest(x,GIT_DIGIT)
  42 #define isalpha(x) sane_istest(x,GIT_ALPHA)
  43 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
  44 #define isprint(x) ((x) >= 0x20 && (x) <= 0x7e)
  45 #define islower(x) sane_iscase(x, 1)
  46 #define isupper(x) sane_iscase(x, 0)
  47 #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL)
  48 #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL)
  49 #define iscntrl(x) (sane_istest(x,GIT_CNTRL))
  50 #define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \
  51                 GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC)
  52 #define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1)
  53 #define tolower(x) sane_case((unsigned char)(x), 0x20)
  54 #define toupper(x) sane_case((unsigned char)(x), 0)
  55 #define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC)
  56
  57 static inline int sane_case(int x, int high)
  58 {
  59         if (sane_istest(x, GIT_ALPHA))
  60                 x = (x & ~0x20) | high;
  61         return x;
  62 }
  63
  64 static inline int sane_iscase(int x, int is_lower)
  65 {
  66         if (!sane_istest(x, GIT_ALPHA))
  67                 return 0;
  68
  69         if (is_lower)
  70                 return (x & 0x20) != 0;
  71         else
  72                 return (x & 0x20) == 0;
  73 }
  74
  75 #endif