gnu/dist/groff/src/libs/libgroff/cmap.cpp

   1 /*      $NetBSD$        */
   2
   3 // -*- C++ -*-
   4 /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
   5      Written by James Clark (jjc@jclark.com)
   6
   7 This file is part of groff.
   8
   9 groff is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 2, or (at your option) any later
  12 version.
  13
  14 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License along
  20 with groff; see the file COPYING.  If not, write to the Free Software
  21 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  22
  23 #include <ctype.h>
  24 #include "cmap.h"
  25
  26 cmap cmlower(CMAP_BUILTIN);
  27 cmap cmupper(CMAP_BUILTIN);
  28
  29 #ifdef isascii
  30 #define ISASCII(c) isascii(c)
  31 #else
  32 #define ISASCII(c) (1)
  33 #endif
  34
  35 cmap::cmap()
  36 {
  37   unsigned char *p = v;
  38   for (int i = 0; i <= UCHAR_MAX; i++)
  39     p[i] = i;
  40 }
  41
  42 cmap::cmap(cmap_builtin)
  43 {
  44   // these are initialised by cmap_init::cmap_init()
  45 }
  46
  47 int cmap_init::initialised = 0;
  48
  49 cmap_init::cmap_init()
  50 {
  51   if (initialised)
  52     return;
  53   initialised = 1;
  54   for (int i = 0; i <= UCHAR_MAX; i++) {
  55     cmupper.v[i] = ISASCII(i) && islower(i) ? toupper(i) : i;
  56     cmlower.v[i] = ISASCII(i) && isupper(i) ? tolower(i) : i;
  57   }
  58 }