ctype_members.cc revision 1.10 
1// std::ctype implementation details, GNU version -*- C++ -*-
2
3// Copyright (C) 2001-2019 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 3, 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// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
23// <http://www.gnu.org/licenses/>.
24
25//
26// ISO C++ 14882: 22.2.1.1.2  ctype virtual functions.
27//
28
29// Written by Benjamin Kosnik <bkoz@redhat.com>
30
31#include <locale>
32#include <bits/c++locale_internal.h>
33#include <cstdlib>
34#include <cstring>
35#include <cstdio>
36
37namespace std _GLIBCXX_VISIBILITY(default)
38{
39  // NB: The other ctype<char> specializations are in src/locale.cc and
40  // various /config/os/* files.
41
42  ctype_byname<char>::ctype_byname(const char* __s, size_t __refs)
43  : ctype<char>(0, false, __refs)
44  {
45    if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
46      {
47	this->_S_destroy_c_locale(this->_M_c_locale_ctype);
48	this->_S_create_c_locale(this->_M_c_locale_ctype, __s);
49      }
50  }
51
52  ctype_byname<char>::~ctype_byname()
53  { }
54
55#ifdef _GLIBCXX_USE_WCHAR_T
56  ctype<wchar_t>::__wmask_type
57  ctype<wchar_t>::_M_convert_to_wmask(const mask __m) const throw()
58  {
59    // Darwin uses the same codes for 'char' as 'wchar_t', so this routine
60    // never gets called.
61    return __m;
62  };
63
64  wchar_t
65  ctype<wchar_t>::do_toupper(wchar_t __c) const
66  { return towupper(__c); }
67
68  const wchar_t*
69  ctype<wchar_t>::do_toupper(wchar_t* __lo, const wchar_t* __hi) const
70  {
71    while (__lo < __hi)
72      {
73        *__lo = towupper(*__lo);
74        ++__lo;
75      }
76    return __hi;
77  }
78
79  wchar_t
80  ctype<wchar_t>::do_tolower(wchar_t __c) const
81  { return towlower(__c); }
82
83  const wchar_t*
84  ctype<wchar_t>::do_tolower(wchar_t* __lo, const wchar_t* __hi) const
85  {
86    while (__lo < __hi)
87      {
88        *__lo = towlower(*__lo);
89        ++__lo;
90      }
91    return __hi;
92  }
93
94  wchar_t
95  ctype<wchar_t>::
96  do_widen(char __c) const
97  { return _M_widen[static_cast<unsigned char>(__c)]; }
98
99  const char*
100  ctype<wchar_t>::
101  do_widen(const char* __lo, const char* __hi, wchar_t* __dest) const
102  {
103    while (__lo < __hi)
104      {
105	*__dest = _M_widen[static_cast<unsigned char>(*__lo)];
106	++__lo;
107	++__dest;
108      }
109    return __hi;
110  }
111
112  char
113  ctype<wchar_t>::
114  do_narrow(wchar_t __wc, char __dfault) const
115  {
116    if (__wc >= 0 && __wc < 128 && _M_narrow_ok)
117      return _M_narrow[__wc];
118    const int __c = wctob(__wc);
119    return (__c == EOF ? __dfault : static_cast<char>(__c));
120  }
121
122  const wchar_t*
123  ctype<wchar_t>::
124  do_narrow(const wchar_t* __lo, const wchar_t* __hi, char __dfault,
125	    char* __dest) const
126  {
127    if (_M_narrow_ok)
128      while (__lo < __hi)
129	{
130	  if (*__lo >= 0 && *__lo < 128)
131	    *__dest = _M_narrow[*__lo];
132	  else
133	    {
134	      const int __c = wctob(*__lo);
135	      *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
136	    }
137	  ++__lo;
138	  ++__dest;
139	}
140    else
141      while (__lo < __hi)
142	{
143	  const int __c = wctob(*__lo);
144	  *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
145	  ++__lo;
146	  ++__dest;
147	}
148    return __hi;
149  }
150
151  void
152  ctype<wchar_t>::_M_initialize_ctype() throw()
153  {
154    wint_t __i;
155    for (__i = 0; __i < 128; ++__i)
156      {
157	const int __c = wctob(__i);
158	if (__c == EOF)
159	  break;
160	else
161	  _M_narrow[__i] = static_cast<char>(__c);
162      }
163    if (__i == 128)
164      _M_narrow_ok = true;
165    else
166      _M_narrow_ok = false;
167    for (size_t __i = 0;
168	 __i < sizeof(_M_widen) / sizeof(wint_t); ++__i)
169      _M_widen[__i] = btowc(__i);
170  }
171#endif //  _GLIBCXX_USE_WCHAR_T
172}
173