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

   1 /*      $NetBSD$        */
   2
   3 // -*- C++ -*-
   4 /* Copyright (C) 1989, 1990, 1991, 1992, 2004 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
  25 #include "lib.h"
  26 #include "cset.h"
  27
  28 cset csalpha(CSET_BUILTIN);
  29 cset csupper(CSET_BUILTIN);
  30 cset cslower(CSET_BUILTIN);
  31 cset csdigit(CSET_BUILTIN);
  32 cset csxdigit(CSET_BUILTIN);
  33 cset csspace(CSET_BUILTIN);
  34 cset cspunct(CSET_BUILTIN);
  35 cset csalnum(CSET_BUILTIN);
  36 cset csprint(CSET_BUILTIN);
  37 cset csgraph(CSET_BUILTIN);
  38 cset cscntrl(CSET_BUILTIN);
  39
  40 #ifdef isascii
  41 #define ISASCII(c) isascii(c)
  42 #else
  43 #define ISASCII(c) (1)
  44 #endif
  45
  46 void cset::clear()
  47 {
  48   char *p = v;
  49   for (int i = 0; i <= UCHAR_MAX; i++)
  50     p[i] = 0;
  51 }
  52
  53 cset::cset()
  54 {
  55   clear();
  56 }
  57
  58 cset::cset(const char *s)
  59 {
  60   clear();
  61   while (*s)
  62     v[(unsigned char)*s++] = 1;
  63 }
  64
  65 cset::cset(const unsigned char *s)
  66 {
  67   clear();
  68   while (*s)
  69     v[*s++] = 1;
  70 }
  71
  72 cset::cset(cset_builtin)
  73 {
  74   // these are initialised by cset_init::cset_init()
  75 }
  76
  77 cset &cset::operator|=(const cset &cs)
  78 {
  79   for (int i = 0; i <= UCHAR_MAX; i++)
  80     if (cs.v[i])
  81       v[i] = 1;
  82   return *this;
  83 }
  84
  85
  86 int cset_init::initialised = 0;
  87
  88 cset_init::cset_init()
  89 {
  90   if (initialised)
  91     return;
  92   initialised = 1;
  93   for (int i = 0; i <= UCHAR_MAX; i++) {
  94     csalpha.v[i] = ISASCII(i) && isalpha(i);
  95     csupper.v[i] = ISASCII(i) && isupper(i);
  96     cslower.v[i] = ISASCII(i) && islower(i);
  97     csdigit.v[i] = ISASCII(i) && isdigit(i);
  98     csxdigit.v[i] = ISASCII(i) && isxdigit(i);
  99     csspace.v[i] = ISASCII(i) && isspace(i);
 100     cspunct.v[i] = ISASCII(i) && ispunct(i);
 101     csalnum.v[i] = ISASCII(i) && isalnum(i);
 102     csprint.v[i] = ISASCII(i) && isprint(i);
 103     csgraph.v[i] = ISASCII(i) && isgraph(i);
 104     cscntrl.v[i] = ISASCII(i) && iscntrl(i);
 105   }
 106 }