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/*
* This file is part of the Colobot: Gold Edition source code
* Copyright (C) 2001-2014, Daniel Roux, EPSITEC SA & TerranovaTeam
* http://epsiteс.ch; http://colobot.info; http://github.com/colobot
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://gnu.org/licenses
*/
#include "common/stringutils.h"
#include <cstdarg>
#include <cstdio>
#include <vector>
static std::string VFormat(const char *fmt, va_list ap)
{
size_t size = 1024;
char stackbuf[1024];
std::vector<char> dynamicbuf;
char *buf = &stackbuf[0];
while (1)
{
int needed = vsnprintf (buf, size, fmt, ap);
if (needed <= static_cast<int>(size) && needed >= 0)
{
return std::string(buf, static_cast<size_t>(needed));
}
size = (needed > 0) ? (needed+1) : (size*2);
dynamicbuf.resize(size);
buf = &dynamicbuf[0];
}
}
std::string StrUtils::Format(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
std::string buf = VFormat(fmt, ap);
va_end(ap);
return buf;
}
std::string StrUtils::Replace(const std::string &str, const std::string &oldStr, const std::string &newStr)
{
std::string result = str;
size_t pos = 0;
while ((pos = str.find(oldStr, pos)) != std::string::npos)
{
result.replace(pos, oldStr.length(), newStr);
pos += newStr.length();
}
return result;
}
std::string StrUtils::UnicodeCharToUtf8(unsigned int ch)
{
std::string result;
if (ch < 0x0080)
{
result += static_cast<char>(ch);
}
else if (ch < 0x0800)
{
char ch1 = 0xC0 | ((ch & 0x07C0) >> 6);
char ch2 = 0x80 | (ch & 0x3F);
result += ch1;
result += ch2;
}
else
{
char ch1 = 0xE0 | ((ch & 0xF000) >> 12);
char ch2 = 0x80 | ((ch & 0x07C0) >> 6);
char ch3 = 0x80 | (ch & 0x3F);
result += ch1;
result += ch2;
result += ch3;
}
return result;
}
std::string StrUtils::UnicodeStringToUtf8(const std::wstring &str)
{
std::string result;
for (unsigned int i = 0; i < str.size(); ++i)
result += StrUtils::UnicodeCharToUtf8(static_cast<unsigned int>(str[i]));
return result;
}
unsigned int StrUtils::Utf8CharToUnicode(const std::string &ch)
{
if (ch.empty())
return 0;
unsigned int result = 0;
if ((ch[0] & 0x80) == 0)
{
if (ch.size() == 1)
result = static_cast<unsigned int>(ch[0]);
}
else if ((ch[0] & 0xC0) == 0xC0)
{
if (ch.size() == 2)
{
unsigned int ch1 = (ch[0] & 0x1F) << 6;
unsigned int ch2 = (ch[1] & 0x3F);
result = ch1 | ch2;
}
}
else
{
if (ch.size() == 3)
{
unsigned int ch1 = (ch[0] & 0xF0) << 12;
unsigned int ch2 = (ch[1] & 0xC0) << 6;
unsigned int ch3 = (ch[2] & 0xC0);
result = ch1 | ch2 | ch3;
}
}
return result;
}
std::wstring StrUtils::Utf8StringToUnicode(const std::string &str)
{
std::wstring result;
unsigned int pos = 0;
while (pos < str.size())
{
int len = StrUtils::Utf8CharSizeAt(str, pos);
if (len == 0)
break;
std::string ch = str.substr(pos, len);
result += static_cast<wchar_t>(StrUtils::Utf8CharToUnicode(ch));
pos += len;
}
return result;
}
int StrUtils::Utf8CharSizeAt(const std::string &str, unsigned int pos)
{
if (pos >= str.size())
return 0;
if ((str[pos] & 0x80) == 0)
return 1;
else if ((str[pos] & 0xC0) == 0xC0)
return 2;
else
return 3;
return 0;
}
size_t StrUtils::Utf8StringLength(const std::string &str)
{
size_t result = 0;
unsigned int i = 0;
while (i < str.size())
{
i += Utf8CharSizeAt(str, i);
++result;
}
return result;
}
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