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

   1 // -*- C++ -*-
   2 /* Copyright (C) 1989, 1990, 1991, 1992, 2004 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
  23 #include "lib.h"
  24 #include "cset.h"
  25
  26 cset csalpha(CSET_BUILTIN);
  27 cset csupper(CSET_BUILTIN);
  28 cset cslower(CSET_BUILTIN);
  29 cset csdigit(CSET_BUILTIN);
  30 cset csxdigit(CSET_BUILTIN);
  31 cset csspace(CSET_BUILTIN);
  32 cset cspunct(CSET_BUILTIN);
  33 cset csalnum(CSET_BUILTIN);
  34 cset csprint(CSET_BUILTIN);
  35 cset csgraph(CSET_BUILTIN);
  36 cset cscntrl(CSET_BUILTIN);
  37
  38 #ifdef isascii
  39 #define ISASCII(c) isascii(c)
  40 #else
  41 #define ISASCII(c) (1)
  42 #endif
  43
  44 void cset::clear()
  45 {
  46   char *p = v;
  47   for (int i = 0; i <= UCHAR_MAX; i++)
  48     p[i] = 0;
  49 }
  50
  51 cset::cset()
  52 {
  53   clear();
  54 }
  55
  56 cset::cset(const char *s)
  57 {
  58   clear();
  59   while (*s)
  60     v[(unsigned char)*s++] = 1;
  61 }
  62
  63 cset::cset(const unsigned char *s)
  64 {
  65   clear();
  66   while (*s)
  67     v[*s++] = 1;
  68 }
  69
  70 cset::cset(cset_builtin)
  71 {
  72   // these are initialised by cset_init::cset_init()
  73 }
  74
  75 cset &cset::operator|=(const cset &cs)
  76 {
  77   for (int i = 0; i <= UCHAR_MAX; i++)
  78     if (cs.v[i])
  79       v[i] = 1;
  80   return *this;
  81 }
  82
  83
  84 int cset_init::initialised = 0;
  85
  86 cset_init::cset_init()
  87 {
  88   if (initialised)
  89     return;
  90   initialised = 1;
  91   for (int i = 0; i <= UCHAR_MAX; i++) {
  92     csalpha.v[i] = ISASCII(i) && isalpha(i);
  93     csupper.v[i] = ISASCII(i) && isupper(i);
  94     cslower.v[i] = ISASCII(i) && islower(i);
  95     csdigit.v[i] = ISASCII(i) && isdigit(i);
  96     csxdigit.v[i] = ISASCII(i) && isxdigit(i);
  97     csspace.v[i] = ISASCII(i) && isspace(i);
  98     cspunct.v[i] = ISASCII(i) && ispunct(i);
  99     csalnum.v[i] = ISASCII(i) && isalnum(i);
 100     csprint.v[i] = ISASCII(i) && isprint(i);
 101     csgraph.v[i] = ISASCII(i) && isgraph(i);
 102     cscntrl.v[i] = ISASCII(i) && iscntrl(i);
 103   }
 104 }