cset.cpp revision 114402 
1// -*- C++ -*-
2/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
3     Written by James Clark (jjc@jclark.com)
4
5This file is part of groff.
6
7groff is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 2, or (at your option) any later
10version.
11
12groff is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License along
18with groff; see the file COPYING.  If not, write to the Free Software
19Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21#include <ctype.h>
22#include "cset.h"
23
24cset csalpha(CSET_BUILTIN);
25cset csupper(CSET_BUILTIN);
26cset cslower(CSET_BUILTIN);
27cset csdigit(CSET_BUILTIN);
28cset csxdigit(CSET_BUILTIN);
29cset csspace(CSET_BUILTIN);
30cset cspunct(CSET_BUILTIN);
31cset csalnum(CSET_BUILTIN);
32cset csprint(CSET_BUILTIN);
33cset csgraph(CSET_BUILTIN);
34cset cscntrl(CSET_BUILTIN);
35
36#ifdef isascii
37#define ISASCII(c) isascii(c)
38#else
39#define ISASCII(c) (1)
40#endif
41
42void cset::clear()
43{
44  char *p = v;
45  for (int i = 0; i <= UCHAR_MAX; i++)
46    p[i] = 0;
47}
48
49cset::cset()
50{
51  clear();
52}
53
54cset::cset(const char *s)
55{
56  clear();
57  while (*s)
58    v[(unsigned char)*s++] = 1;
59}
60
61cset::cset(const unsigned char *s)
62{
63  clear();
64  while (*s)
65    v[*s++] = 1;
66}
67
68cset::cset(cset_builtin)
69{
70  // these are initialised by cset_init::cset_init()
71}
72
73cset &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
82int cset_init::initialised = 0;
83
84cset_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}
103