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/* -*- C++ -*-
*
* Encoding.cpp - Character encoding handler
*
* Copyright (c) 2019-2020 Ogapee. All rights reserved.
*
* ogapee@aqua.dti2.ne.jp
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "Encoding.h"
extern unsigned short convSJIS2UTF16(unsigned short in);
extern unsigned short convUTF8ToUTF16(const char **src);
Encoding::Encoding()
{
code = CODE_CP932;
}
Encoding::~Encoding()
{
}
void Encoding::setEncoding(int code)
{
this->code = code;
}
int Encoding::getBytes(unsigned char ch, int code)
{
if (code == -1) code = this->code;
if (code == CODE_CP932){
if ((ch & 0xe0) == 0xe0 || (ch & 0xe0) == 0x80) return 2;
}
else{
if (0 <= ch && ch < 0x80) return 1;
if (0xc0 <= ch && ch < 0xe0) return 2;
if (0xe0 <= ch && ch < 0xf0) return 3;
if (0xf0 <= ch && ch < 0xf8) return 4;
}
return 1;
}
int Encoding::getNum(const unsigned char *buf)
{
int n = 0;
while(buf[0] != 0){
int n2 = getBytes(buf[0]);
n++;
if (n2 > 1) n++;
buf += n2;
}
return n;
}
char Encoding::getTextMarker()
{
if (code == CODE_UTF8)
return '^';
return '`';
}
unsigned short Encoding::getUTF16(const char *text, int code)
{
unsigned short unicode = 0;
if (code == -1) code = this->code;
if (code == CODE_CP932){
if ((text[0] & 0xe0) == 0xe0 || (text[0] & 0xe0) == 0x80){
unsigned index = ((unsigned char*)text)[0];
index = index << 8 | ((unsigned char*)text)[1];
unicode = convSJIS2UTF16(index);
}
else{
if ((text[0] & 0xe0) == 0xa0 || (text[0] & 0xe0) == 0xc0)
unicode = ((unsigned char*)text)[0] - 0xa0 + 0xff60;
else
unicode = text[0];
}
}
else{
unicode = convUTF8ToUTF16(&text);
}
return unicode;
}
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