1 // std::ctype implementation details, GNU version -*- C++ -*-
3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 // Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // Under Section 7 of GPL version 3, you are granted additional
18 // permissions described in the GCC Runtime Library Exception, version
19 // 3.1, as published by the Free Software Foundation.
21 // You should have received a copy of the GNU General Public License and
22 // a copy of the GCC Runtime Library Exception along with this program;
23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 // <http://www.gnu.org/licenses/>.
27 // ISO C++ 14882: 22.2.1.1.2 ctype virtual functions.
30 // Written by Benjamin Kosnik <bkoz@redhat.com>
34 #include <bits/c++locale_internal.h>
36 namespace std _GLIBCXX_VISIBILITY(default)
38 _GLIBCXX_BEGIN_NAMESPACE_VERSION
40 // NB: The other ctype<char> specializations are in src/locale.cc and
41 // various /config/os/* files.
42 ctype_byname<char>::ctype_byname(const char* __s, size_t __refs)
43 : ctype<char>(0, false, __refs)
45 if (std::strcmp(__s, "C") != 0 && std::strcmp(__s, "POSIX") != 0)
47 this->_S_destroy_c_locale(this->_M_c_locale_ctype);
48 this->_S_create_c_locale(this->_M_c_locale_ctype, __s);
49 this->_M_toupper = this->_M_c_locale_ctype->__ctype_toupper;
50 this->_M_tolower = this->_M_c_locale_ctype->__ctype_tolower;
51 this->_M_table = this->_M_c_locale_ctype->__ctype_b;
55 ctype_byname<char>::~ctype_byname()
58 #ifdef _GLIBCXX_USE_WCHAR_T
59 ctype<wchar_t>::__wmask_type
60 ctype<wchar_t>::_M_convert_to_wmask(const mask __m) const throw()
66 __ret = __wctype_l("space", _M_c_locale_ctype);
69 __ret = __wctype_l("print", _M_c_locale_ctype);
72 __ret = __wctype_l("cntrl", _M_c_locale_ctype);
75 __ret = __wctype_l("upper", _M_c_locale_ctype);
78 __ret = __wctype_l("lower", _M_c_locale_ctype);
81 __ret = __wctype_l("alpha", _M_c_locale_ctype);
84 __ret = __wctype_l("digit", _M_c_locale_ctype);
87 __ret = __wctype_l("punct", _M_c_locale_ctype);
90 __ret = __wctype_l("xdigit", _M_c_locale_ctype);
93 __ret = __wctype_l("alnum", _M_c_locale_ctype);
96 __ret = __wctype_l("graph", _M_c_locale_ctype);
99 __ret = __wmask_type();
105 ctype<wchar_t>::do_toupper(wchar_t __c) const
106 { return __towupper_l(__c, _M_c_locale_ctype); }
109 ctype<wchar_t>::do_toupper(wchar_t* __lo, const wchar_t* __hi) const
113 *__lo = __towupper_l(*__lo, _M_c_locale_ctype);
120 ctype<wchar_t>::do_tolower(wchar_t __c) const
121 { return __towlower_l(__c, _M_c_locale_ctype); }
124 ctype<wchar_t>::do_tolower(wchar_t* __lo, const wchar_t* __hi) const
128 *__lo = __towlower_l(*__lo, _M_c_locale_ctype);
136 do_is(mask __m, wchar_t __c) const
138 // The case of __m == ctype_base::space is particularly important,
139 // due to its use in many istream functions. Therefore we deal with
140 // it first, exploiting the knowledge that on GNU systems _M_bit[5]
141 // is the mask corresponding to ctype_base::space. NB: an encoding
142 // change would not affect correctness!
144 if (__m == _M_bit[5])
145 __ret = __iswctype_l(__c, _M_wmask[5], _M_c_locale_ctype);
148 // Highest bitmask in ctype_base == 10, but extra in "C"
149 // library for blank.
150 const size_t __bitmasksize = 11;
151 for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
152 if (__m & _M_bit[__bitcur])
154 if (__iswctype_l(__c, _M_wmask[__bitcur], _M_c_locale_ctype))
159 else if (__m == _M_bit[__bitcur])
168 do_is(const wchar_t* __lo, const wchar_t* __hi, mask* __vec) const
170 for (; __lo < __hi; ++__vec, ++__lo)
172 // Highest bitmask in ctype_base == 10, but extra in "C"
173 // library for blank.
174 const size_t __bitmasksize = 11;
176 for (size_t __bitcur = 0; __bitcur <= __bitmasksize; ++__bitcur)
177 if (__iswctype_l(*__lo, _M_wmask[__bitcur], _M_c_locale_ctype))
178 __m |= _M_bit[__bitcur];
186 do_scan_is(mask __m, const wchar_t* __lo, const wchar_t* __hi) const
188 while (__lo < __hi && !this->do_is(__m, *__lo))
195 do_scan_not(mask __m, const char_type* __lo, const char_type* __hi) const
197 while (__lo < __hi && this->do_is(__m, *__lo) != 0)
204 do_widen(char __c) const
205 { return _M_widen[static_cast<unsigned char>(__c)]; }
209 do_widen(const char* __lo, const char* __hi, wchar_t* __dest) const
213 *__dest = _M_widen[static_cast<unsigned char>(*__lo)];
222 do_narrow(wchar_t __wc, char __dfault) const
224 if (__wc >= 0 && __wc < 128 && _M_narrow_ok)
225 return _M_narrow[__wc];
226 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
227 __c_locale __old = __uselocale(_M_c_locale_ctype);
229 const int __c = wctob(__wc);
230 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
233 return (__c == EOF ? __dfault : static_cast<char>(__c));
238 do_narrow(const wchar_t* __lo, const wchar_t* __hi, char __dfault,
241 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
242 __c_locale __old = __uselocale(_M_c_locale_ctype);
247 if (*__lo >= 0 && *__lo < 128)
248 *__dest = _M_narrow[*__lo];
251 const int __c = wctob(*__lo);
252 *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
260 const int __c = wctob(*__lo);
261 *__dest = (__c == EOF ? __dfault : static_cast<char>(__c));
265 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
272 ctype<wchar_t>::_M_initialize_ctype() throw()
274 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
275 __c_locale __old = __uselocale(_M_c_locale_ctype);
278 for (__i = 0; __i < 128; ++__i)
280 const int __c = wctob(__i);
284 _M_narrow[__i] = static_cast<char>(__c);
289 _M_narrow_ok = false;
291 __j < sizeof(_M_widen) / sizeof(wint_t); ++__j)
292 _M_widen[__j] = btowc(__j);
294 for (size_t __k = 0; __k <= 11; ++__k)
296 _M_bit[__k] = static_cast<mask>(_ISbit(__k));
297 _M_wmask[__k] = _M_convert_to_wmask(_M_bit[__k]);
299 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
303 #endif // _GLIBCXX_USE_WCHAR_T
305 _GLIBCXX_END_NAMESPACE_VERSION