libgroff/cmap.cc

   1 // -*- C++ -*-
   2 /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
   3      Written by James Clark (jjc@jclark.com)
   4
   5 This file is part of groff.
   6
   7 groff is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with groff; see the file COPYING.  If not, write to the Free Software
  19 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
  20
  21 #include <ctype.h>
  22 #include "cmap.h"
  23
  24 cmap cmlower(CMAP_BUILTIN);
  25 cmap cmupper(CMAP_BUILTIN);
  26
  27 #define ISASCII(c) isascii(c)
  28 #if 0
  29 #define ISASCII(c) 1 /* use this is you have an ANSI ctype.h */
  30 #endif
  31
  32 cmap::cmap()
  33 {
  34   unsigned char *p = v;
  35   for (int i = 0; i <= UCHAR_MAX; i++)
  36     p[i] = i;
  37 }
  38
  39 cmap::cmap(cmap_builtin)
  40 {
  41   // these are initialised by cmap_init::cmap_init()
  42 }
  43
  44 int cmap_init::initialised = 0;
  45
  46 cmap_init::cmap_init()
  47 {
  48   if (initialised)
  49     return;
  50   initialised = 1;
  51   for (int i = 0; i <= UCHAR_MAX; i++) {
  52     cmupper.v[i] = ISASCII(i) && islower(i) ? toupper(i) : i;
  53     cmlower.v[i] = ISASCII(i) && isupper(i) ? tolower(i) : i;
  54   }
  55 }