274 lines
7.3 KiB
C++
274 lines
7.3 KiB
C++
// std::numpunct implementation details, GNU version -*- C++ -*-
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// Copyright (C) 2001-2019 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 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
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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//
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// ISO C++ 14882: 22.2.3.1.2 numpunct virtual functions
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//
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// Written by Benjamin Kosnik <bkoz@redhat.com>
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#include <locale>
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#include <bits/c++locale_internal.h>
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#include <iconv.h>
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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extern char __narrow_multibyte_chars(const char* s, __locale_t cloc);
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// This file might be compiled twice, but we only want to define this once.
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#if ! _GLIBCXX_USE_CXX11_ABI
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char
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__narrow_multibyte_chars(const char* s, __locale_t cloc)
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{
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const char* codeset = __nl_langinfo_l(CODESET, cloc);
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if (!strcmp(codeset, "UTF-8"))
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{
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// optimize for some known cases
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if (!strcmp(s, "\u202F")) // NARROW NO-BREAK SPACE
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return ' ';
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if (!strcmp(s, "\u2019")) // RIGHT SINGLE QUOTATION MARK
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return '\'';
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if (!strcmp(s, "\u066C")) // ARABIC THOUSANDS SEPARATOR
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return '\'';
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}
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iconv_t cd = iconv_open("ASCII//TRANSLIT", codeset);
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if (cd != (iconv_t)-1)
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{
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char c1;
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size_t inbytesleft = strlen(s);
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size_t outbytesleft = 1;
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char* inbuf = const_cast<char*>(s);
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char* outbuf = &c1;
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size_t n = iconv(cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
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iconv_close(cd);
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if (n != (size_t)-1)
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{
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cd = iconv_open(codeset, "ASCII");
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if (cd != (iconv_t)-1)
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{
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char c2;
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inbuf = &c1;
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inbytesleft = 1;
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outbuf = &c2;
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outbytesleft = 1;
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n = iconv(cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
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iconv_close(cd);
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if (n != (size_t)-1)
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return c2;
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}
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}
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}
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return '\0';
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}
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#endif
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template<>
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void
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numpunct<char>::_M_initialize_numpunct(__c_locale __cloc)
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{
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if (!_M_data)
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_M_data = new __numpunct_cache<char>;
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if (!__cloc)
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{
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// "C" locale
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_M_data->_M_grouping = "";
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_M_data->_M_grouping_size = 0;
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_M_data->_M_use_grouping = false;
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_M_data->_M_decimal_point = '.';
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_M_data->_M_thousands_sep = ',';
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for (size_t __i = 0; __i < __num_base::_S_oend; ++__i)
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_M_data->_M_atoms_out[__i] = __num_base::_S_atoms_out[__i];
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for (size_t __j = 0; __j < __num_base::_S_iend; ++__j)
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_M_data->_M_atoms_in[__j] = __num_base::_S_atoms_in[__j];
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}
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else
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{
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// Named locale.
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_M_data->_M_decimal_point = *(__nl_langinfo_l(DECIMAL_POINT,
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__cloc));
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const char* thousands_sep = __nl_langinfo_l(THOUSANDS_SEP, __cloc);
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if (thousands_sep[0] != '\0' && thousands_sep[1] != '\0')
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_M_data->_M_thousands_sep = __narrow_multibyte_chars(thousands_sep,
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__cloc);
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else
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_M_data->_M_thousands_sep = *thousands_sep;
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// Check for NULL, which implies no grouping.
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if (_M_data->_M_thousands_sep == '\0')
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{
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// Like in "C" locale.
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_M_data->_M_grouping = "";
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_M_data->_M_grouping_size = 0;
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_M_data->_M_use_grouping = false;
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_M_data->_M_thousands_sep = ',';
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}
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else
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{
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const char* __src = __nl_langinfo_l(GROUPING, __cloc);
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const size_t __len = strlen(__src);
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if (__len)
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{
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__try
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{
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char* __dst = new char[__len + 1];
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memcpy(__dst, __src, __len + 1);
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_M_data->_M_grouping = __dst;
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}
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__catch(...)
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{
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delete _M_data;
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_M_data = 0;
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__throw_exception_again;
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}
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}
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else
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{
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_M_data->_M_grouping = "";
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_M_data->_M_use_grouping = false;
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}
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_M_data->_M_grouping_size = __len;
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}
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}
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// NB: There is no way to extact this info from posix locales.
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// _M_truename = __nl_langinfo_l(YESSTR, __cloc);
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_M_data->_M_truename = "true";
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_M_data->_M_truename_size = 4;
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// _M_falsename = __nl_langinfo_l(NOSTR, __cloc);
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_M_data->_M_falsename = "false";
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_M_data->_M_falsename_size = 5;
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}
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template<>
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numpunct<char>::~numpunct()
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{
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if (_M_data->_M_grouping_size)
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delete [] _M_data->_M_grouping;
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delete _M_data;
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}
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#ifdef _GLIBCXX_USE_WCHAR_T
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template<>
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void
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numpunct<wchar_t>::_M_initialize_numpunct(__c_locale __cloc)
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{
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if (!_M_data)
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_M_data = new __numpunct_cache<wchar_t>;
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if (!__cloc)
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{
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// "C" locale
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_M_data->_M_grouping = "";
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_M_data->_M_grouping_size = 0;
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_M_data->_M_use_grouping = false;
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_M_data->_M_decimal_point = L'.';
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_M_data->_M_thousands_sep = L',';
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// Use ctype::widen code without the facet...
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for (size_t __i = 0; __i < __num_base::_S_oend; ++__i)
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_M_data->_M_atoms_out[__i] =
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static_cast<wchar_t>(__num_base::_S_atoms_out[__i]);
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for (size_t __j = 0; __j < __num_base::_S_iend; ++__j)
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_M_data->_M_atoms_in[__j] =
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static_cast<wchar_t>(__num_base::_S_atoms_in[__j]);
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}
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else
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{
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// Named locale.
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// NB: In the GNU model wchar_t is always 32 bit wide.
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union { char *__s; wchar_t __w; } __u;
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__u.__s = __nl_langinfo_l(_NL_NUMERIC_DECIMAL_POINT_WC, __cloc);
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_M_data->_M_decimal_point = __u.__w;
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__u.__s = __nl_langinfo_l(_NL_NUMERIC_THOUSANDS_SEP_WC, __cloc);
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_M_data->_M_thousands_sep = __u.__w;
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// Check for NULL, which implies no grouping.
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if (_M_data->_M_thousands_sep == L'\0')
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{
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// Like in "C" locale.
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_M_data->_M_grouping = "";
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_M_data->_M_grouping_size = 0;
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_M_data->_M_use_grouping = false;
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_M_data->_M_thousands_sep = L',';
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}
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else
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{
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const char* __src = __nl_langinfo_l(GROUPING, __cloc);
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const size_t __len = strlen(__src);
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if (__len)
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{
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__try
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{
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char* __dst = new char[__len + 1];
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memcpy(__dst, __src, __len + 1);
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_M_data->_M_grouping = __dst;
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}
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__catch(...)
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{
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delete _M_data;
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_M_data = 0;
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__throw_exception_again;
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}
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}
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else
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{
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_M_data->_M_grouping = "";
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_M_data->_M_use_grouping = false;
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}
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_M_data->_M_grouping_size = __len;
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}
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}
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// NB: There is no way to extact this info from posix locales.
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// _M_truename = __nl_langinfo_l(YESSTR, __cloc);
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_M_data->_M_truename = L"true";
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_M_data->_M_truename_size = 4;
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// _M_falsename = __nl_langinfo_l(NOSTR, __cloc);
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_M_data->_M_falsename = L"false";
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_M_data->_M_falsename_size = 5;
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}
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template<>
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numpunct<wchar_t>::~numpunct()
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{
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if (_M_data->_M_grouping_size)
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delete [] _M_data->_M_grouping;
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delete _M_data;
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}
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#endif
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace
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