src/libs/libgroff/cset.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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
  20
  21 #include <ctype.h>
  22 #include "cset.h"
  23
  24 cset csalpha(CSET_BUILTIN);
  25 cset csupper(CSET_BUILTIN);
  26 cset cslower(CSET_BUILTIN);
  27 cset csdigit(CSET_BUILTIN);
  28 cset csxdigit(CSET_BUILTIN);
  29 cset csspace(CSET_BUILTIN);
  30 cset cspunct(CSET_BUILTIN);
  31 cset csalnum(CSET_BUILTIN);
  32 cset csprint(CSET_BUILTIN);
  33 cset csgraph(CSET_BUILTIN);
  34 cset cscntrl(CSET_BUILTIN);
  35
  36 #ifdef isascii
  37 #define ISASCII(c) isascii(c)
  38 #else
  39 #define ISASCII(c) (1)
  40 #endif
  41
  42 void cset::clear()
  43 {
  44   char *p = v;
  45   for (int i = 0; i <= UCHAR_MAX; i++)
  46     p[i] = 0;
  47 }
  48
  49 cset::cset()
  50 {
  51   clear();
  52 }
  53
  54 cset::cset(const char *s)
  55 {
  56   clear();
  57   while (*s)
  58     v[(unsigned char)*s++] = 1;
  59 }
  60
  61 cset::cset(const unsigned char *s)
  62 {
  63   clear();
  64   while (*s)
  65     v[*s++] = 1;
  66 }
  67
  68 cset::cset(cset_builtin)
  69 {
  70   // these are initialised by cset_init::cset_init()
  71 }
  72
  73 cset &cset::operator|=(const cset &cs)
  74 {
  75   for (int i = 0; i <= UCHAR_MAX; i++)
  76     if (cs.v[i])
  77       v[i] = 1;
  78   return *this;
  79 }
  80
  81
  82 int cset_init::initialised = 0;
  83
  84 cset_init::cset_init()
  85 {
  86   if (initialised)
  87     return;
  88   initialised = 1;
  89   for (int i = 0; i <= UCHAR_MAX; i++) {
  90     csalpha.v[i] = ISASCII(i) && isalpha(i);
  91     csupper.v[i] = ISASCII(i) && isupper(i);
  92     cslower.v[i] = ISASCII(i) && islower(i);
  93     csdigit.v[i] = ISASCII(i) && isdigit(i);
  94     csxdigit.v[i] = ISASCII(i) && isxdigit(i);
  95     csspace.v[i] = ISASCII(i) && isspace(i);
  96     cspunct.v[i] = ISASCII(i) && ispunct(i);
  97     csalnum.v[i] = ISASCII(i) && isalnum(i);
  98     csprint.v[i] = ISASCII(i) && isprint(i);
  99     csgraph.v[i] = ISASCII(i) && isgraph(i);
 100     cscntrl.v[i] = ISASCII(i) && iscntrl(i);
 101   }
 102 }