1// std::ctype implementation details, generic version -*- C++ -*-
2
3// Copyright (C) 2001, 2002, 2003, 2004, 2005 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//
31// ISO C++ 14882: 22.2.1.1.2  ctype virtual functions.
32//
33
34// Written by Benjamin Kosnik <bkoz@redhat.com>
35
36#include <locale>
37
38_GLIBCXX_BEGIN_NAMESPACE(std)
39
40  // NB: The other ctype<char> specializations are in src/locale.cc and
41  // various /config/os/* files.
42  template<>
43    ctype_byname<char>::ctype_byname(const char* __s, size_t __refs)
44    : ctype<char>(0, false, __refs)
45    {
46      if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
47	{
48	  this->_S_destroy_c_locale(this->_M_c_locale_ctype);
49	  this->_S_create_c_locale(this->_M_c_locale_ctype, __s);
50	}
51    }
52
53#ifdef _GLIBCXX_USE_WCHAR_T
54  ctype<wchar_t>::__wmask_type
55  ctype<wchar_t>::_M_convert_to_wmask(const mask __m) const
56  {
57    __wmask_type __ret;
58    switch (__m)
59      {
60      case space:
61	__ret = wctype("space");
62	break;
63      case print:
64	__ret = wctype("print");
65	break;
66      case cntrl:
67	__ret = wctype("cntrl");
68	break;
69      case upper:
70	__ret = wctype("upper");
71	break;
72      case lower:
73	__ret = wctype("lower");
74	break;
75      case alpha:
76	__ret = wctype("alpha");
77	break;
78      case digit:
79	__ret = wctype("digit");
80	break;
81      case punct:
82	__ret = wctype("punct");
83	break;
84      case xdigit:
85	__ret = wctype("xdigit");
86	break;
87      case alnum:
88	__ret = wctype("alnum");
89	break;
90      case graph:
91	__ret = wctype("graph");
92	break;
93      default:
94	__ret = __wmask_type();
95      }
96    return __ret;
97  };
98
99  wchar_t
100  ctype<wchar_t>::do_toupper(wchar_t __c) const
101  { return towupper(__c); }
102
103  const wchar_t*
104  ctype<wchar_t>::do_toupper(wchar_t* __lo, const wchar_t* __hi) const
105  {
106    while (__lo < __hi)
107      {
108        *__lo = towupper(*__lo);
109        ++__lo;
110      }
111    return __hi;
112  }
113
114  wchar_t
115  ctype<wchar_t>::do_tolower(wchar_t __c) const
116  { return towlower(__c); }
117
118  const wchar_t*
119  ctype<wchar_t>::do_tolower(wchar_t* __lo, const wchar_t* __hi) const
120  {
121    while (__lo < __hi)
122      {
123        *__lo = towlower(*__lo);
124        ++__lo;
125      }
126    return __hi;
127  }
128
129  bool
130  ctype<wchar_t>::
131  do_is(mask __m, char_type __c) const
132  {
133    bool __ret = false;
134    // Generically, 15 (instead of 10) since we don't know the numerical
135    // encoding of the various categories in /usr/include/ctype.h.
136    const size_t __bitmasksize = 15;
137    for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
138      if (__m & _M_bit[__bitcur]
139	  && iswctype(__c, _M_wmask[__bitcur]))
140	{
141	  __ret = true;
142	  break;
143	}
144    return __ret;
145  }
146
147  const wchar_t*
148  ctype<wchar_t>::
149  do_is(const wchar_t* __lo, const wchar_t* __hi, mask* __vec) const
150  {
151    for (;__lo < __hi; ++__vec, ++__lo)
152      {
153	// Generically, 15 (instead of 10) since we don't know the numerical
154	// encoding of the various categories in /usr/include/ctype.h.
155	const size_t __bitmasksize = 15;
156	mask __m = 0;
157	for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
158	  if (iswctype(*__lo, _M_wmask[__bitcur]))
159	    __m |= _M_bit[__bitcur];
160	*__vec = __m;
161      }
162    return __hi;
163  }
164
165  const wchar_t*
166  ctype<wchar_t>::
167  do_scan_is(mask __m, const wchar_t* __lo, const wchar_t* __hi) const
168  {
169    while (__lo < __hi && !this->do_is(__m, *__lo))
170      ++__lo;
171    return __lo;
172  }
173
174  const wchar_t*
175  ctype<wchar_t>::
176  do_scan_not(mask __m, const char_type* __lo, const char_type* __hi) const
177  {
178    while (__lo < __hi && this->do_is(__m, *__lo) != 0)
179      ++__lo;
180    return __lo;
181  }
182
183  wchar_t
184  ctype<wchar_t>::
185  do_widen(char __c) const
186  { return _M_widen[static_cast<unsigned char>(__c)]; }
187
188  const char*
189  ctype<wchar_t>::
190  do_widen(const char* __lo, const char* __hi, wchar_t* __dest) const
191  {
192    while (__lo < __hi)
193      {
194	*__dest = _M_widen[static_cast<unsigned char>(*__lo)];
195	++__lo;
196	++__dest;
197      }
198    return __hi;
199  }
200
201  char
202  ctype<wchar_t>::
203  do_narrow(wchar_t __wc, char __dfault) const
204  {
205    if (__wc >= 0 && __wc < 128 && _M_narrow_ok)
206      return _M_narrow[__wc];
207    const int __c = wctob(__wc);
208    return (__c == EOF ? __dfault : static_cast<char>(__c));
209  }
210
211  const wchar_t*
212  ctype<wchar_t>::
213  do_narrow(const wchar_t* __lo, const wchar_t* __hi, char __dfault,
214	    char* __dest) const
215  {
216    if (_M_narrow_ok)
217      while (__lo < __hi)
218	{
219	  if (*__lo >= 0 && *__lo < 128)
220	    *__dest = _M_narrow[*__lo];
221	  else
222	    {
223	      const int __c = wctob(*__lo);
224	      *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
225	    }
226	  ++__lo;
227	  ++__dest;
228	}
229    else
230      while (__lo < __hi)
231	{
232	  const int __c = wctob(*__lo);
233	  *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
234	  ++__lo;
235	  ++__dest;
236	}
237    return __hi;
238  }
239
240  void
241  ctype<wchar_t>::_M_initialize_ctype()
242  {
243    wint_t __i;
244    for (__i = 0; __i < 128; ++__i)
245      {
246	const int __c = wctob(__i);
247	if (__c == EOF)
248	  break;
249	else
250	  _M_narrow[__i] = static_cast<char>(__c);
251      }
252    if (__i == 128)
253      _M_narrow_ok = true;
254    else
255      _M_narrow_ok = false;
256    for (size_t __i = 0;
257	 __i < sizeof(_M_widen) / sizeof(wint_t); ++__i)
258      _M_widen[__i] = btowc(__i);
259
260    for (size_t __i = 0; __i <= 15; ++__i)
261      {
262	_M_bit[__i] = static_cast<mask>(1 << __i);
263	_M_wmask[__i] = _M_convert_to_wmask(_M_bit[__i]);
264      }
265  }
266#endif //  _GLIBCXX_USE_WCHAR_T
267
268_GLIBCXX_END_NAMESPACE
269