wget/src/safe-ctype.c

/* <ctype.h> replacement macros.

   Copyright (C) 2000 Free Software Foundation, Inc.
   Contributed by Zack Weinberg <zackw@stanford.edu>.

This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

Libiberty is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite
Boston, MA 02111-1307, USA.

In addition, as a special exception, the Free Software Foundation
gives permission to link the code of its release of Wget with the
OpenSSL project's "OpenSSL" library (or with modified versions of it
that use the same license as the "OpenSSL" library), and distribute
the linked executables.  You must obey the GNU General Public License
in all respects for all of the code used other than "OpenSSL".  If you
modify this file, you may extend this exception to your version of the
file, but you are not obligated to do so.  If you do not wish to do
so, delete this exception statement from your version.  */

/* This is a compatible replacement of the standard C library's <ctype.h>
   with the following properties:

   - Implements all isxxx() macros required by C99.
   - Also implements some character classes useful when
     parsing C-like languages.
   - Does not change behavior depending on the current locale.
   - Behaves properly for all values in the range of a signed or
     unsigned char.  */

#include <config.h>
#include <safe-ctype.h>
#include <stdio.h>  /* for EOF */

/* Shorthand */
#define bl _sch_isblank
#define cn _sch_iscntrl
#define di _sch_isdigit
#define is _sch_isidst
#define lo _sch_islower
#define nv _sch_isnvsp
#define pn _sch_ispunct
#define pr _sch_isprint
#define sp _sch_isspace
#define up _sch_isupper
#define vs _sch_isvsp
#define xd _sch_isxdigit

/* Masks.  */
#define L  lo|is   |pr	/* lower case letter */
#define XL lo|is|xd|pr	/* lowercase hex digit */
#define U  up|is   |pr	/* upper case letter */
#define XU up|is|xd|pr	/* uppercase hex digit */
#define D  di   |xd|pr	/* decimal digit */
#define P  pn      |pr	/* punctuation */
#define _  pn|is   |pr	/* underscore */

#define C           cn	/* control character */
#define Z  nv      |cn	/* NUL */
#define M  nv|sp   |cn	/* cursor movement: \f \v */
#define V  vs|sp   |cn	/* vertical space: \r \n */
#define T  nv|sp|bl|cn	/* tab */
#define S  nv|sp|bl|pr	/* space */

/* Are we ASCII? */
#if '\n' == 0x0A && ' ' == 0x20 && '0' == 0x30 \
  && 'A' == 0x41 && 'a' == 0x61 && '!' == 0x21 \
  && EOF == -1

const unsigned short _sch_istable[256] =
{
  Z,  C,  C,  C,   C,  C,  C,  C,   /* NUL SOH STX ETX  EOT ENQ ACK BEL */
  C,  T,  V,  M,   M,  V,  C,  C,   /* BS  HT  LF  VT   FF  CR  SO  SI  */
  C,  C,  C,  C,   C,  C,  C,  C,   /* DLE DC1 DC2 DC3  DC4 NAK SYN ETB */
  C,  C,  C,  C,   C,  C,  C,  C,   /* CAN EM  SUB ESC  FS  GS  RS  US  */
  S,  P,  P,  P,   P,  P,  P,  P,   /* SP  !   "   #    $   %   &   '   */
  P,  P,  P,  P,   P,  P,  P,  P,   /* (   )   *   +    ,   -   .   /   */
  D,  D,  D,  D,   D,  D,  D,  D,   /* 0   1   2   3    4   5   6   7   */
  D,  D,  P,  P,   P,  P,  P,  P,   /* 8   9   :   ;    <   =   >   ?   */
  P, XU, XU, XU,  XU, XU, XU,  U,   /* @   A   B   C    D   E   F   G   */
  U,  U,  U,  U,   U,  U,  U,  U,   /* H   I   J   K    L   M   N   O   */
  U,  U,  U,  U,   U,  U,  U,  U,   /* P   Q   R   S    T   U   V   W   */
  U,  U,  U,  P,   P,  P,  P,  _,   /* X   Y   Z   [    \   ]   ^   _   */
  P, XL, XL, XL,  XL, XL, XL,  L,   /* `   a   b   c    d   e   f   g   */
  L,  L,  L,  L,   L,  L,  L,  L,   /* h   i   j   k    l   m   n   o   */
  L,  L,  L,  L,   L,  L,  L,  L,   /* p   q   r   s    t   u   v   w   */
  L,  L,  L,  P,   P,  P,  P,  C,   /* x   y   z   {    |   }   ~   DEL */

  /* high half of unsigned char is locale-specific, so all tests are
     false in "C" locale */
  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,

  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,  0, 0, 0, 0,
};

const unsigned char _sch_tolower[256] =
{
   0,  1,  2,  3,   4,  5,  6,  7,   8,  9, 10, 11,  12, 13, 14, 15,
  16, 17, 18, 19,  20, 21, 22, 23,  24, 25, 26, 27,  28, 29, 30, 31,
  32, 33, 34, 35,  36, 37, 38, 39,  40, 41, 42, 43,  44, 45, 46, 47,
  48, 49, 50, 51,  52, 53, 54, 55,  56, 57, 58, 59,  60, 61, 62, 63,
  64,

  'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
  'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',

  91, 92, 93, 94, 95, 96,

  'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
  'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',

 123,124,125,126,127,

 128,129,130,131, 132,133,134,135, 136,137,138,139, 140,141,142,143,
 144,145,146,147, 148,149,150,151, 152,153,154,155, 156,157,158,159,
 160,161,162,163, 164,165,166,167, 168,169,170,171, 172,173,174,175,
 176,177,178,179, 180,181,182,183, 184,185,186,187, 188,189,190,191,

 192,193,194,195, 196,197,198,199, 200,201,202,203, 204,205,206,207,
 208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223,
 224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239,
 240,241,242,243, 244,245,246,247, 248,249,250,251, 252,253,254,255,
};

const unsigned char _sch_toupper[256] =
{
   0,  1,  2,  3,   4,  5,  6,  7,   8,  9, 10, 11,  12, 13, 14, 15,
  16, 17, 18, 19,  20, 21, 22, 23,  24, 25, 26, 27,  28, 29, 30, 31,
  32, 33, 34, 35,  36, 37, 38, 39,  40, 41, 42, 43,  44, 45, 46, 47,
  48, 49, 50, 51,  52, 53, 54, 55,  56, 57, 58, 59,  60, 61, 62, 63,
  64,

  'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
  'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',

  91, 92, 93, 94, 95, 96,

  'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
  'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',

 123,124,125,126,127,

 128,129,130,131, 132,133,134,135, 136,137,138,139, 140,141,142,143,
 144,145,146,147, 148,149,150,151, 152,153,154,155, 156,157,158,159,
 160,161,162,163, 164,165,166,167, 168,169,170,171, 172,173,174,175,
 176,177,178,179, 180,181,182,183, 184,185,186,187, 188,189,190,191,

 192,193,194,195, 196,197,198,199, 200,201,202,203, 204,205,206,207,
 208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223,
 224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239,
 240,241,242,243, 244,245,246,247, 248,249,250,251, 252,253,254,255,
};

#else
 #error "Unsupported host character set"
#endif /* not ASCII */