0,0 → 1,298 |
// Locale support -*- C++ -*- |
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// Copyright (C) 2007-2013 Free Software Foundation, Inc. |
// |
// This file is part of the GNU ISO C++ Library. This library is free |
// software; you can redistribute it and/or modify it under the |
// terms of the GNU General Public License as published by the |
// Free Software Foundation; either version 3, or (at your option) |
// any later version. |
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// This library is distributed in the hope that it will be useful, |
// but WITHOUT ANY WARRANTY; without even the implied warranty of |
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
// GNU General Public License for more details. |
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// Under Section 7 of GPL version 3, you are granted additional |
// permissions described in the GCC Runtime Library Exception, version |
// 3.1, as published by the Free Software Foundation. |
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// You should have received a copy of the GNU General Public License and |
// a copy of the GCC Runtime Library Exception along with this program; |
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
// <http://www.gnu.org/licenses/>. |
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/** @file bits/locale_classes.tcc |
* This is an internal header file, included by other library headers. |
* Do not attempt to use it directly. @headername{locale} |
*/ |
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// |
// ISO C++ 14882: 22.1 Locales |
// |
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#ifndef _LOCALE_CLASSES_TCC |
#define _LOCALE_CLASSES_TCC 1 |
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#pragma GCC system_header |
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namespace std _GLIBCXX_VISIBILITY(default) |
{ |
_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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template<typename _Facet> |
locale:: |
locale(const locale& __other, _Facet* __f) |
{ |
_M_impl = new _Impl(*__other._M_impl, 1); |
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__try |
{ _M_impl->_M_install_facet(&_Facet::id, __f); } |
__catch(...) |
{ |
_M_impl->_M_remove_reference(); |
__throw_exception_again; |
} |
delete [] _M_impl->_M_names[0]; |
_M_impl->_M_names[0] = 0; // Unnamed. |
} |
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template<typename _Facet> |
locale |
locale:: |
combine(const locale& __other) const |
{ |
_Impl* __tmp = new _Impl(*_M_impl, 1); |
__try |
{ |
__tmp->_M_replace_facet(__other._M_impl, &_Facet::id); |
} |
__catch(...) |
{ |
__tmp->_M_remove_reference(); |
__throw_exception_again; |
} |
return locale(__tmp); |
} |
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template<typename _CharT, typename _Traits, typename _Alloc> |
bool |
locale:: |
operator()(const basic_string<_CharT, _Traits, _Alloc>& __s1, |
const basic_string<_CharT, _Traits, _Alloc>& __s2) const |
{ |
typedef std::collate<_CharT> __collate_type; |
const __collate_type& __collate = use_facet<__collate_type>(*this); |
return (__collate.compare(__s1.data(), __s1.data() + __s1.length(), |
__s2.data(), __s2.data() + __s2.length()) < 0); |
} |
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/** |
* @brief Test for the presence of a facet. |
* @ingroup locales |
* |
* has_facet tests the locale argument for the presence of the facet type |
* provided as the template parameter. Facets derived from the facet |
* parameter will also return true. |
* |
* @tparam _Facet The facet type to test the presence of. |
* @param __loc The locale to test. |
* @return true if @p __loc contains a facet of type _Facet, else false. |
*/ |
template<typename _Facet> |
bool |
has_facet(const locale& __loc) throw() |
{ |
const size_t __i = _Facet::id._M_id(); |
const locale::facet** __facets = __loc._M_impl->_M_facets; |
return (__i < __loc._M_impl->_M_facets_size |
#ifdef __GXX_RTTI |
&& dynamic_cast<const _Facet*>(__facets[__i])); |
#else |
&& static_cast<const _Facet*>(__facets[__i])); |
#endif |
} |
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/** |
* @brief Return a facet. |
* @ingroup locales |
* |
* use_facet looks for and returns a reference to a facet of type Facet |
* where Facet is the template parameter. If has_facet(locale) is true, |
* there is a suitable facet to return. It throws std::bad_cast if the |
* locale doesn't contain a facet of type Facet. |
* |
* @tparam _Facet The facet type to access. |
* @param __loc The locale to use. |
* @return Reference to facet of type Facet. |
* @throw std::bad_cast if @p __loc doesn't contain a facet of type _Facet. |
*/ |
template<typename _Facet> |
const _Facet& |
use_facet(const locale& __loc) |
{ |
const size_t __i = _Facet::id._M_id(); |
const locale::facet** __facets = __loc._M_impl->_M_facets; |
if (__i >= __loc._M_impl->_M_facets_size || !__facets[__i]) |
__throw_bad_cast(); |
#ifdef __GXX_RTTI |
return dynamic_cast<const _Facet&>(*__facets[__i]); |
#else |
return static_cast<const _Facet&>(*__facets[__i]); |
#endif |
} |
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// Generic version does nothing. |
template<typename _CharT> |
int |
collate<_CharT>::_M_compare(const _CharT*, const _CharT*) const throw () |
{ return 0; } |
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// Generic version does nothing. |
template<typename _CharT> |
size_t |
collate<_CharT>::_M_transform(_CharT*, const _CharT*, size_t) const throw () |
{ return 0; } |
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template<typename _CharT> |
int |
collate<_CharT>:: |
do_compare(const _CharT* __lo1, const _CharT* __hi1, |
const _CharT* __lo2, const _CharT* __hi2) const |
{ |
// strcoll assumes zero-terminated strings so we make a copy |
// and then put a zero at the end. |
const string_type __one(__lo1, __hi1); |
const string_type __two(__lo2, __hi2); |
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const _CharT* __p = __one.c_str(); |
const _CharT* __pend = __one.data() + __one.length(); |
const _CharT* __q = __two.c_str(); |
const _CharT* __qend = __two.data() + __two.length(); |
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// strcoll stops when it sees a nul character so we break |
// the strings into zero-terminated substrings and pass those |
// to strcoll. |
for (;;) |
{ |
const int __res = _M_compare(__p, __q); |
if (__res) |
return __res; |
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__p += char_traits<_CharT>::length(__p); |
__q += char_traits<_CharT>::length(__q); |
if (__p == __pend && __q == __qend) |
return 0; |
else if (__p == __pend) |
return -1; |
else if (__q == __qend) |
return 1; |
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__p++; |
__q++; |
} |
} |
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template<typename _CharT> |
typename collate<_CharT>::string_type |
collate<_CharT>:: |
do_transform(const _CharT* __lo, const _CharT* __hi) const |
{ |
string_type __ret; |
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// strxfrm assumes zero-terminated strings so we make a copy |
const string_type __str(__lo, __hi); |
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const _CharT* __p = __str.c_str(); |
const _CharT* __pend = __str.data() + __str.length(); |
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size_t __len = (__hi - __lo) * 2; |
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_CharT* __c = new _CharT[__len]; |
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__try |
{ |
// strxfrm stops when it sees a nul character so we break |
// the string into zero-terminated substrings and pass those |
// to strxfrm. |
for (;;) |
{ |
// First try a buffer perhaps big enough. |
size_t __res = _M_transform(__c, __p, __len); |
// If the buffer was not large enough, try again with the |
// correct size. |
if (__res >= __len) |
{ |
__len = __res + 1; |
delete [] __c, __c = 0; |
__c = new _CharT[__len]; |
__res = _M_transform(__c, __p, __len); |
} |
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__ret.append(__c, __res); |
__p += char_traits<_CharT>::length(__p); |
if (__p == __pend) |
break; |
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__p++; |
__ret.push_back(_CharT()); |
} |
} |
__catch(...) |
{ |
delete [] __c; |
__throw_exception_again; |
} |
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delete [] __c; |
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return __ret; |
} |
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template<typename _CharT> |
long |
collate<_CharT>:: |
do_hash(const _CharT* __lo, const _CharT* __hi) const |
{ |
unsigned long __val = 0; |
for (; __lo < __hi; ++__lo) |
__val = |
*__lo + ((__val << 7) |
| (__val >> (__gnu_cxx::__numeric_traits<unsigned long>:: |
__digits - 7))); |
return static_cast<long>(__val); |
} |
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// Inhibit implicit instantiations for required instantiations, |
// which are defined via explicit instantiations elsewhere. |
#if _GLIBCXX_EXTERN_TEMPLATE |
extern template class collate<char>; |
extern template class collate_byname<char>; |
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extern template |
const collate<char>& |
use_facet<collate<char> >(const locale&); |
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extern template |
bool |
has_facet<collate<char> >(const locale&); |
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#ifdef _GLIBCXX_USE_WCHAR_T |
extern template class collate<wchar_t>; |
extern template class collate_byname<wchar_t>; |
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extern template |
const collate<wchar_t>& |
use_facet<collate<wchar_t> >(const locale&); |
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extern template |
bool |
has_facet<collate<wchar_t> >(const locale&); |
#endif |
#endif |
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_GLIBCXX_END_NAMESPACE_VERSION |
} // namespace std |
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#endif |