148 lines
3.9 KiB
C++
148 lines
3.9 KiB
C++
/***************************************************************************
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* Copyright (C) 2008-2012 by Andrzej Rybczak *
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* electricityispower@gmail.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program 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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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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***************************************************************************/
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#include "charset.h"
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#ifdef HAVE_ICONV_H
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#include <iconv.h>
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#include <cstdlib>
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#include <cstring>
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#include <fstream>
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#include <iostream>
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#include <stdexcept>
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#include "settings.h"
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namespace {//
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bool is_utf8(const char *s)
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{
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for (; *s; ++s)
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{
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if (*s & 0x80) // 1xxxxxxx
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{
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char c = 0x40;
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unsigned i = 0;
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while (c & *s)
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++i, c >>= 1;
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if (i < 1 || i > 3) // not 110xxxxx, 1110xxxx, 11110xxx
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return false;
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for (unsigned j = 0; j < i; ++j)
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if (!*++s || !(*s & 0x80) || *s & 0x40) // 10xxxxxx
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return false;
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}
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}
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return true;
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}
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bool has_non_ascii_chars(const char *s)
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{
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for (; *s; ++s)
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if (*s & 0x80)
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return true;
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return false;
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}
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void charset_convert(const char *from, const char *to, const char *&inbuf,
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bool delete_old, size_t len = 0)
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{
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assert(inbuf);
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assert(from);
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assert(to);
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iconv_t cd = iconv_open(to, from);
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if (cd == iconv_t(-1))
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{
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std::cerr << "Error while executing iconv_open: " << strerror(errno) << "\n";
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return;
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}
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if (!len)
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len = strlen(inbuf);
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size_t buflen = len*MB_CUR_MAX+1;
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char *outbuf = static_cast<char *>(malloc(buflen));
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char *outstart = outbuf;
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const char *instart = inbuf;
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if (iconv(cd, const_cast<ICONV_CONST char **>(&inbuf), &len, &outbuf, &buflen) == size_t(-1))
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{
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std::cerr << "Error while executing iconv: " << strerror(errno) << "\n";
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inbuf = instart;
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delete [] outstart;
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}
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else
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{
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*outbuf = 0;
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if (delete_old)
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free(const_cast<char *>(instart));
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inbuf = outstart;
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}
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iconv_close(cd);
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}
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}
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namespace IConv {//
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void convertFromTo(const char *from, const char *to, std::string &s)
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{
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const char *tmp = strdup(s.c_str());
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charset_convert(from, to, tmp, true, s.length());
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s = tmp;
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free(const_cast<char *>(tmp));
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}
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std::string utf8ToLocale(std::string s)
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{
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utf8ToLocale_(s);
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return s;
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}
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void utf8ToLocale_(std::string &s)
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{
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if (Config.system_encoding.empty() || !has_non_ascii_chars(s.c_str()))
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return;
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const char *tmp = strdup(s.c_str());
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charset_convert("utf-8", Config.system_encoding.c_str(), tmp, 1, s.length());
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s = tmp;
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free(const_cast<char *>(tmp));
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}
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std::string localeToUtf8(std::string s)
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{
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localeToUtf8_(s);
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return s;
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}
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void localeToUtf8_(std::string &s)
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{
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if (Config.system_encoding.empty() || !has_non_ascii_chars(s.c_str()) || is_utf8(s.c_str()))
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return;
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const char *tmp = strdup(s.c_str());
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charset_convert(Config.system_encoding.c_str(), "utf-8", tmp, 1, s.length());
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s = tmp;
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free(const_cast<char *>(tmp));
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}
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}
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#endif // HAVE_ICONV_H
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