1// Locale support -*- C++ -*-
2
3// Copyright (C) 2000, 2003 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 2, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15
16// You should have received a copy of the GNU General Public License along
17// with this library; see the file COPYING.  If not, write to the Free
18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19// USA.
20
21// As a special exception, you may use this file as part of a free software
22// library without restriction.  Specifically, if other files instantiate
23// templates or use macros or inline functions from this file, or you compile
24// this file and link it with other files to produce an executable, this
25// file does not by itself cause the resulting executable to be covered by
26// the GNU General Public License.  This exception does not however
27// invalidate any other reasons why the executable file might be covered by
28// the GNU General Public License.
29
30/** @file ctype_inline.h
31 *  This is an internal header file, included by other library headers.
32 *  You should not attempt to use it directly.
33 */
34
35//
36// ISO C++ 14882: 22.1  Locales
37//
38
39// ctype bits to be inlined go here. Non-inlinable (ie virtual do_*)
40// functions go in ctype.cc
41
42// The following definitions are portable, but insanely slow. If one
43// cares at all about performance, then specialized ctype
44// functionality should be added for the native os in question: see
45// the config/os/bits/ctype_*.h files.
46
47// Constructing a synthetic "C" table should be seriously considered...
48
49_GLIBCXX_BEGIN_NAMESPACE(std)
50
51  bool
52  ctype<char>::
53  is(mask __m, char __c) const
54  {
55    if (_M_table)
56      return _M_table[static_cast<unsigned char>(__c)] & __m;
57    else
58      {
59	bool __ret = false;
60	const size_t __bitmasksize = 15;
61	size_t __bitcur = 0; // Lowest bitmask in ctype_base == 0
62	for (; __bitcur <= __bitmasksize; ++__bitcur)
63	  {
64	    const mask __bit = static_cast<mask>(1 << __bitcur);
65	    if (__m & __bit)
66	      {
67		bool __testis;
68		switch (__bit)
69		  {
70		  case space:
71		    __testis = isspace(__c);
72		    break;
73		  case print:
74		    __testis = isprint(__c);
75		    break;
76		  case cntrl:
77		    __testis = iscntrl(__c);
78		    break;
79		  case upper:
80		    __testis = isupper(__c);
81		    break;
82		  case lower:
83		    __testis = islower(__c);
84		    break;
85		  case alpha:
86		    __testis = isalpha(__c);
87		    break;
88		  case digit:
89		    __testis = isdigit(__c);
90		    break;
91		  case punct:
92		    __testis = ispunct(__c);
93		    break;
94		  case xdigit:
95		    __testis = isxdigit(__c);
96		    break;
97		  case alnum:
98		    __testis = isalnum(__c);
99		    break;
100		  case graph:
101		    __testis = isgraph(__c);
102		    break;
103		  default:
104		    __testis = false;
105		    break;
106		  }
107		__ret |= __testis;
108	      }
109	  }
110	return __ret;
111      }
112  }
113
114  const char*
115  ctype<char>::
116  is(const char* __low, const char* __high, mask* __vec) const
117  {
118    if (_M_table)
119      while (__low < __high)
120	*__vec++ = _M_table[static_cast<unsigned char>(*__low++)];
121    else
122      {
123	// Highest bitmask in ctype_base == 10.
124	const size_t __bitmasksize = 15;
125	for (;__low < __high; ++__vec, ++__low)
126	  {
127	    mask __m = 0;
128	    // Lowest bitmask in ctype_base == 0
129	    size_t __i = 0;
130	    for (;__i <= __bitmasksize; ++__i)
131	      {
132		const mask __bit = static_cast<mask>(1 << __i);
133		if (this->is(__bit, *__low))
134		  __m |= __bit;
135	      }
136	    *__vec = __m;
137	  }
138      }
139    return __high;
140  }
141
142  const char*
143  ctype<char>::
144  scan_is(mask __m, const char* __low, const char* __high) const
145  {
146    if (_M_table)
147      while (__low < __high
148	     && !(_M_table[static_cast<unsigned char>(*__low)] & __m))
149	++__low;
150    else
151      while (__low < __high && !this->is(__m, *__low))
152	++__low;
153    return __low;
154  }
155
156  const char*
157  ctype<char>::
158  scan_not(mask __m, const char* __low, const char* __high) const
159  {
160    if (_M_table)
161      while (__low < __high
162	     && (_M_table[static_cast<unsigned char>(*__low)] & __m) != 0)
163	++__low;
164    else
165      while (__low < __high && this->is(__m, *__low) != 0)
166	++__low;
167    return __low;
168  }
169
170_GLIBCXX_END_NAMESPACE
171