contrib/groff-1.19/src/libs/libgroff/cmap.cpp

   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, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  20
  21 #include <ctype.h>
  22 #include "cmap.h"
  23
  24 cmap cmlower(CMAP_BUILTIN);
  25 cmap cmupper(CMAP_BUILTIN);
  26
  27 #ifdef isascii
  28 #define ISASCII(c) isascii(c)
  29 #else
  30 #define ISASCII(c) (1)
  31 #endif
  32
  33 cmap::cmap()
  34 {
  35   unsigned char *p = v;
  36   for (int i = 0; i <= UCHAR_MAX; i++)
  37     p[i] = i;
  38 }
  39
  40 cmap::cmap(cmap_builtin)
  41 {
  42   // these are initialised by cmap_init::cmap_init()
  43 }
  44
  45 int cmap_init::initialised = 0;
  46
  47 cmap_init::cmap_init()
  48 {
  49   if (initialised)
  50     return;
  51   initialised = 1;
  52   for (int i = 0; i <= UCHAR_MAX; i++) {
  53     cmupper.v[i] = ISASCII(i) && islower(i) ? toupper(i) : i;
  54     cmlower.v[i] = ISASCII(i) && isupper(i) ? tolower(i) : i;
  55   }
  56 }