ctype_members.cc revision 122182 
1327Sjkh// std::ctype implementation details, GNU version -*- C++ -*-
2327Sjkh
3327Sjkh// Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
4327Sjkh//
5327Sjkh// This file is part of the GNU ISO C++ Library.  This library is free
6327Sjkh// software; you can redistribute it and/or modify it under the
7327Sjkh// terms of the GNU General Public License as published by the
8327Sjkh// Free Software Foundation; either version 2, or (at your option)
9327Sjkh// any later version.
10327Sjkh
11327Sjkh// This library is distributed in the hope that it will be useful,
12327Sjkh// but WITHOUT ANY WARRANTY; without even the implied warranty of
13327Sjkh// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14327Sjkh// GNU General Public License for more details.
15327Sjkh
16327Sjkh// You should have received a copy of the GNU General Public License along
17327Sjkh// with this library; see the file COPYING.  If not, write to the Free
18327Sjkh// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
19327Sjkh// USA.
20327Sjkh
21327Sjkh// As a special exception, you may use this file as part of a free software
2293520Sobrien// library without restriction.  Specifically, if other files instantiate
2393520Sobrien// templates or use macros or inline functions from this file, or you compile
2493520Sobrien// this file and link it with other files to produce an executable, this
25327Sjkh// file does not by itself cause the resulting executable to be covered by
26327Sjkh// the GNU General Public License.  This exception does not however
271338Sjkh// invalidate any other reasons why the executable file might be covered by
28136643Sobrien// the GNU General Public License.
29327Sjkh
3017338Sjkh//
311338Sjkh// ISO C++ 14882: 22.2.1.1.2  ctype virtual functions.
32159554Sobrien//
33
34// Written by Benjamin Kosnik <bkoz@redhat.com>
35
36#include <locale>
37#include <bits/c++locale_internal.h>
38
39namespace std
40{
41  // NB: The other ctype<char> specializations are in src/locale.cc and
42  // various /config/os/* files.
43  template<>
44    ctype_byname<char>::ctype_byname(const char* __s, size_t __refs)
45    : ctype<char>(0, false, __refs)
46    {
47      _S_destroy_c_locale(_M_c_locale_ctype);
48      _S_create_c_locale(_M_c_locale_ctype, __s);
49      _M_toupper = _M_c_locale_ctype->__ctype_toupper;
50      _M_tolower = _M_c_locale_ctype->__ctype_tolower;
51      _M_table = _M_c_locale_ctype->__ctype_b;
52    }
53
54#ifdef _GLIBCPP_USE_WCHAR_T
55  ctype<wchar_t>::__wmask_type
56  ctype<wchar_t>::_M_convert_to_wmask(const mask __m) const
57  {
58    __wmask_type __ret;
59    switch (__m)
60      {
61      case space:
62	__ret = __wctype_l("space", _M_c_locale_ctype);
63	break;
64      case print:
65	__ret = __wctype_l("print", _M_c_locale_ctype);
66	break;
67      case cntrl:
68	__ret = __wctype_l("cntrl", _M_c_locale_ctype);
69	break;
70      case upper:
71	__ret = __wctype_l("upper", _M_c_locale_ctype);
72	break;
73      case lower:
74	__ret = __wctype_l("lower", _M_c_locale_ctype);
75	break;
76      case alpha:
77	__ret = __wctype_l("alpha", _M_c_locale_ctype);
78	break;
79      case digit:
80	__ret = __wctype_l("digit", _M_c_locale_ctype);
81	break;
82      case punct:
83	__ret = __wctype_l("punct", _M_c_locale_ctype);
84	break;
85      case xdigit:
86	__ret = __wctype_l("xdigit", _M_c_locale_ctype);
87	break;
88      case alnum:
89	__ret = __wctype_l("alnum", _M_c_locale_ctype);
90	break;
91      case graph:
92	__ret = __wctype_l("graph", _M_c_locale_ctype);
93	break;
94      default:
95	__ret = 0;
96      }
97    return __ret;
98  };
99
100  wchar_t
101  ctype<wchar_t>::do_toupper(wchar_t __c) const
102  { return __towupper_l(__c, _M_c_locale_ctype); }
103
104  const wchar_t*
105  ctype<wchar_t>::do_toupper(wchar_t* __lo, const wchar_t* __hi) const
106  {
107    while (__lo < __hi)
108      {
109        *__lo = __towupper_l(*__lo, _M_c_locale_ctype);
110        ++__lo;
111      }
112    return __hi;
113  }
114
115  wchar_t
116  ctype<wchar_t>::do_tolower(wchar_t __c) const
117  { return __towlower_l(__c, _M_c_locale_ctype); }
118
119  const wchar_t*
120  ctype<wchar_t>::do_tolower(wchar_t* __lo, const wchar_t* __hi) const
121  {
122    while (__lo < __hi)
123      {
124        *__lo = __towlower_l(*__lo, _M_c_locale_ctype);
125        ++__lo;
126      }
127    return __hi;
128  }
129
130  bool
131  ctype<wchar_t>::
132  do_is(mask __m, wchar_t __c) const
133  {
134    // Highest bitmask in ctype_base == 10, but extra in "C"
135    // library for blank.
136    bool __ret = false;
137    const size_t __bitmasksize = 11;
138    for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
139      {
140	const mask __bit = static_cast<mask>(_ISbit(__bitcur));
141	if (__m & __bit)
142	  __ret |= __iswctype_l(__c, _M_convert_to_wmask(__bit),
143				_M_c_locale_ctype);
144      }
145    return __ret;
146  }
147
148  const wchar_t*
149  ctype<wchar_t>::
150  do_is(const wchar_t* __lo, const wchar_t* __hi, mask* __vec) const
151  {
152    for (;__lo < __hi; ++__vec, ++__lo)
153      {
154	// Highest bitmask in ctype_base == 10, but extra in "C"
155	// library for blank.
156	const size_t __bitmasksize = 11;
157	mask __m = 0;
158	for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
159	  {
160	    const mask __bit = static_cast<mask>(_ISbit(__bitcur));
161	    if (__iswctype_l(*__lo, _M_convert_to_wmask(__bit),
162			     _M_c_locale_ctype))
163	      __m |= __bit;
164	  }
165	*__vec = __m;
166      }
167    return __hi;
168  }
169
170  const wchar_t*
171  ctype<wchar_t>::
172  do_scan_is(mask __m, const wchar_t* __lo, const wchar_t* __hi) const
173  {
174    while (__lo < __hi && !this->do_is(__m, *__lo))
175      ++__lo;
176    return __lo;
177  }
178
179  const wchar_t*
180  ctype<wchar_t>::
181  do_scan_not(mask __m, const char_type* __lo, const char_type* __hi) const
182  {
183    while (__lo < __hi && this->do_is(__m, *__lo) != 0)
184      ++__lo;
185    return __lo;
186  }
187
188  wchar_t
189  ctype<wchar_t>::
190  do_widen(char __c) const
191  {
192#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
193    __c_locale __old = __uselocale(_M_c_locale_ctype);
194#endif
195    wchar_t __ret = btowc(__c);
196#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
197    __uselocale(__old);
198#endif
199    return __ret;
200  }
201
202  const char*
203  ctype<wchar_t>::
204  do_widen(const char* __lo, const char* __hi, wchar_t* __dest) const
205  {
206#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
207    __c_locale __old = __uselocale(_M_c_locale_ctype);
208#endif
209    mbstate_t __state;
210    memset(static_cast<void*>(&__state), 0, sizeof(mbstate_t));
211    mbsrtowcs(__dest, &__lo, __hi - __lo, &__state);
212#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
213    __uselocale(__old);
214#endif
215    return __hi;
216  }
217
218  char
219  ctype<wchar_t>::
220  do_narrow(wchar_t __wc, char __dfault) const
221  {
222#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
223    __c_locale __old = __uselocale(_M_c_locale_ctype);
224#endif
225    int __c = wctob(__wc);
226#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
227    __uselocale(__old);
228#endif
229    return (__c == EOF ? __dfault : static_cast<char>(__c));
230  }
231
232  const wchar_t*
233  ctype<wchar_t>::
234  do_narrow(const wchar_t* __lo, const wchar_t* __hi, char __dfault,
235	    char* __dest) const
236  {
237#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
238    __c_locale __old = __uselocale(_M_c_locale_ctype);
239#endif
240    size_t __offset = 0;
241    while (true)
242      {
243	const wchar_t* __start = __lo + __offset;
244	size_t __len = __hi - __start;
245
246	mbstate_t __state;
247	memset(static_cast<void*>(&__state), 0, sizeof(mbstate_t));
248	size_t __con = wcsrtombs(__dest + __offset, &__start, __len, &__state);
249	if (__con != __len && __start != 0)
250	  {
251	    __offset = __start - __lo;
252	    __dest[__offset++] = __dfault;
253	  }
254	else
255	  break;
256      }
257#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
258    __uselocale(__old);
259#endif
260    return __hi;
261  }
262#endif //  _GLIBCPP_USE_WCHAR_T
263}
264