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[unix-history] / usr / src / usr.bin / groff / libgroff / cset.cc

// -*- C++ -*-
/* Copyright (C) 1989, 1990 Free Software Foundation, Inc.
    Written by James Clark (jjc@jclark.uucp)

This file is part of groff.

groff is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 1, or (at your option) any later
version.

groff 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 General Public License
for more details.

You should have received a copy of the GNU General Public License along
with groff; see the file LICENSE.  If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */

#include <ctype.h>
#include "cset.h"

cset csalpha(CSET_BUILTIN);
cset csupper(CSET_BUILTIN);
cset cslower(CSET_BUILTIN);
cset csdigit(CSET_BUILTIN);
cset csxdigit(CSET_BUILTIN);
cset csspace(CSET_BUILTIN);
cset cspunct(CSET_BUILTIN);
cset csalnum(CSET_BUILTIN);
cset csprint(CSET_BUILTIN);
cset csgraph(CSET_BUILTIN);
cset cscntrl(CSET_BUILTIN);

#define ISASCII(c) isascii(c)
#if 0
#define ISASCII(c) 1 /* use this is you have an ANSI ctype.h */
#endif

void cset::clear()
{
 char *p = v;
 for (int i = 0; i <= UCHAR_MAX; i++)
   p[i] = 0;
}

cset::cset()
{
 clear();
}

cset::cset(const char *s)
{
 clear();
 while (*s)
   v[(unsigned char)*s++] = 1;
}

cset::cset(const unsigned char *s)
{
 clear();
 while (*s)
   v[*s++] = 1;
}

cset::cset(cset_builtin)
{
 // these are initialised by cset_init::cset_init()
}

cset &cset::operator|=(const cset &cs)
{
 for (int i = 0; i <= UCHAR_MAX; i++)
   if (cs.v[i])
     v[i] = 1;
 return *this;
}


int cset_init::initialised = 0;

cset_init::cset_init()
{
 if (initialised)
   return;
 initialised = 1;
 for (int i = 0; i <= UCHAR_MAX; i++) {
   csalpha.v[i] = ISASCII(i) && isalpha(i);
   csupper.v[i] = ISASCII(i) && isupper(i);
   cslower.v[i] = ISASCII(i) && islower(i);
   csdigit.v[i] = ISASCII(i) && isdigit(i);
   csxdigit.v[i] = ISASCII(i) && isxdigit(i);
   csspace.v[i] = ISASCII(i) && isspace(i);
   cspunct.v[i] = ISASCII(i) && ispunct(i);
   csalnum.v[i] = ISASCII(i) && isalnum(i);
   csprint.v[i] = ISASCII(i) && isprint(i);
   csgraph.v[i] = ISASCII(i) && isgraph(i);
   cscntrl.v[i] = ISASCII(i) && iscntrl(i);
 }
}