libiberty/safe-ctype.c

   1 /* <ctype.h> replacement macros.
   2
   3    Copyright (C) 2000 Free Software Foundation, Inc.
   4    Contributed by Zack Weinberg <zackw@stanford.edu>.
   5
   6 This file is part of the libiberty library.
   7 Libiberty is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU Library General Public
   9 License as published by the Free Software Foundation; either
  10 version 2 of the License, or (at your option) any later version.
  11
  12 Libiberty is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 Library General Public License for more details.
  16
  17 You should have received a copy of the GNU Library General Public
  18 License along with libiberty; see the file COPYING.LIB.  If
  19 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 /* This is a compatible replacement of the standard C library's <ctype.h>
  23    with the following properties:
  24
  25    - Implements all isxxx() macros required by C99.
  26    - Also implements some character classes useful when
  27      parsing C-like languages.
  28    - Does not change behavior depending on the current locale.
  29    - Behaves properly for all values in the range of a signed or
  30      unsigned char.  */
  31
  32 #include "ansidecl.h"
  33 #include <safe-ctype.h>
  34 #include <stdio.h>  /* for EOF */
  35
  36 /* Shorthand */
  37 #define bl _sch_isblank
  38 #define cn _sch_iscntrl
  39 #define di _sch_isdigit
  40 #define is _sch_isidst
  41 #define lo _sch_islower
  42 #define nv _sch_isnvsp
  43 #define pn _sch_ispunct
  44 #define pr _sch_isprint
  45 #define sp _sch_isspace
  46 #define up _sch_isupper
  47 #define vs _sch_isvsp
  48 #define xd _sch_isxdigit
  49
  50 /* Masks.  */
  51 #define L  (const unsigned short) (lo|is   |pr) /* lower case letter */
  52 #define XL (const unsigned short) (lo|is|xd|pr) /* lowercase hex digit */
  53 #define U  (const unsigned short) (up|is   |pr) /* upper case letter */
  54 #define XU (const unsigned short) (up|is|xd|pr) /* uppercase hex digit */
  55 #define D  (const unsigned short) (di   |xd|pr) /* decimal digit */
  56 #define P  (const unsigned short) (pn      |pr) /* punctuation */
  57 #define _  (const unsigned short) (pn|is   |pr) /* underscore */
  58
  59 #define C  (const unsigned short) (         cn) /* control character */
  60 #define Z  (const unsigned short) (nv      |cn) /* NUL */
  61 #define M  (const unsigned short) (nv|sp   |cn) /* cursor movement: \f \v */
  62 #define V  (const unsigned short) (vs|sp   |cn) /* vertical space: \r \n */
  63 #define T  (const unsigned short) (nv|sp|bl|cn) /* tab */
  64 #define S  (const unsigned short) (nv|sp|bl|pr) /* space */
  65
  66 /* Are we ASCII? */
  67 #if '\n' == 0x0A && ' ' == 0x20 && '0' == 0x30 \
  68   && 'A' == 0x41 && 'a' == 0x61 && '!' == 0x21 \
  69   && EOF == -1
  70
  71 const unsigned short _sch_istable[256] =
  72 {
  73   Z,  C,  C,  C,   C,  C,  C,  C,   /* NUL SOH STX ETX  EOT ENQ ACK BEL */
  74   C,  T,  V,  M,   M,  V,  C,  C,   /* BS  HT  LF  VT   FF  CR  SO  SI  */
  75   C,  C,  C,  C,   C,  C,  C,  C,   /* DLE DC1 DC2 DC3  DC4 NAK SYN ETB */
  76   C,  C,  C,  C,   C,  C,  C,  C,   /* CAN EM  SUB ESC  FS  GS  RS  US  */
  77   S,  P,  P,  P,   P,  P,  P,  P,   /* SP  !   "   #    $   %   &   '   */
  78   P,  P,  P,  P,   P,  P,  P,  P,   /* (   )   *   +    ,   -   .   /   */
  79   D,  D,  D,  D,   D,  D,  D,  D,   /* 0   1   2   3    4   5   6   7   */
  80   D,  D,  P,  P,   P,  P,  P,  P,   /* 8   9   :   ;    <   =   >   ?   */
  81   P, XU, XU, XU,  XU, XU, XU,  U,   /* @   A   B   C    D   E   F   G   */
  82   U,  U,  U,  U,   U,  U,  U,  U,   /* H   I   J   K    L   M   N   O   */
  83   U,  U,  U,  U,   U,  U,  U,  U,   /* P   Q   R   S    T   U   V   W   */
  84   U,  U,  U,  P,   P,  P,  P,  _,   /* X   Y   Z   [    \   ]   ^   _   */
  85   P, XL, XL, XL,  XL, XL, XL,  L,   /* `   a   b   c    d   e   f   g   */
  86   L,  L,  L,  L,   L,  L,  L,  L,   /* h   i   j   k    l   m   n   o   */
  87   L,  L,  L,  L,   L,  L,  L,  L,   /* p   q   r   s    t   u   v   w   */
  88   L,  L,  L,  P,   P,  P,  P,  C,   /* x   y   z   {    |   }   ~   DEL */
  89
  90   /* high half of unsigned char is locale-specific, so all tests are
  91      false in "C" locale */
  92   0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
  93   0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
  94   0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
  95   0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
  96
  97   0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
  98   0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
  99   0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
 100   0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
 101 };
 102
 103 const unsigned char _sch_tolower[256] =
 104 {
 105    0,  1,  2,  3,   4,  5,  6,  7,   8,  9, 10, 11,  12, 13, 14, 15,
 106   16, 17, 18, 19,  20, 21, 22, 23,  24, 25, 26, 27,  28, 29, 30, 31,
 107   32, 33, 34, 35,  36, 37, 38, 39,  40, 41, 42, 43,  44, 45, 46, 47,
 108   48, 49, 50, 51,  52, 53, 54, 55,  56, 57, 58, 59,  60, 61, 62, 63,
 109   64,
 110
 111   'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
 112   'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
 113
 114   91, 92, 93, 94, 95, 96,
 115
 116   'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
 117   'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
 118
 119  123,124,125,126,127,
 120
 121  128,129,130,131, 132,133,134,135, 136,137,138,139, 140,141,142,143,
 122  144,145,146,147, 148,149,150,151, 152,153,154,155, 156,157,158,159,
 123  160,161,162,163, 164,165,166,167, 168,169,170,171, 172,173,174,175,
 124  176,177,178,179, 180,181,182,183, 184,185,186,187, 188,189,190,191,
 125
 126  192,193,194,195, 196,197,198,199, 200,201,202,203, 204,205,206,207,
 127  208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223,
 128  224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239,
 129  240,241,242,243, 244,245,246,247, 248,249,250,251, 252,253,254,255,
 130 };
 131
 132 const unsigned char _sch_toupper[256] =
 133 {
 134    0,  1,  2,  3,   4,  5,  6,  7,   8,  9, 10, 11,  12, 13, 14, 15,
 135   16, 17, 18, 19,  20, 21, 22, 23,  24, 25, 26, 27,  28, 29, 30, 31,
 136   32, 33, 34, 35,  36, 37, 38, 39,  40, 41, 42, 43,  44, 45, 46, 47,
 137   48, 49, 50, 51,  52, 53, 54, 55,  56, 57, 58, 59,  60, 61, 62, 63,
 138   64,
 139
 140   'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
 141   'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
 142
 143   91, 92, 93, 94, 95, 96,
 144
 145   'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
 146   'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
 147
 148  123,124,125,126,127,
 149
 150  128,129,130,131, 132,133,134,135, 136,137,138,139, 140,141,142,143,
 151  144,145,146,147, 148,149,150,151, 152,153,154,155, 156,157,158,159,
 152  160,161,162,163, 164,165,166,167, 168,169,170,171, 172,173,174,175,
 153  176,177,178,179, 180,181,182,183, 184,185,186,187, 188,189,190,191,
 154
 155  192,193,194,195, 196,197,198,199, 200,201,202,203, 204,205,206,207,
 156  208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223,
 157  224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239,
 158  240,241,242,243, 244,245,246,247, 248,249,250,251, 252,253,254,255,
 159 };
 160
 161 #else
 162  #error "Unsupported host character set"
 163 #endif /* not ASCII */