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/* M-runtime for c++
* Copyright (C) 2005-2008 Vladimir Menshakov
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef CURRENCY_SYMBOL
# undef CURRENCY_SYMBOL
#endif
#include "tclUniData.c"
#include "utf8_utils.h"
#define WCHAR_T_SIZE 4
static const unsigned char totalBytes[256] = {
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
#if WCHAR_T_SIZE > 3
4,4,4,4,4,4,4,4,
#else
1,1,1,1,1,1,1,1,
#endif
#if WCHAR_T_SIZE > 4
5,5,5,5,
#else
1,1,1,1,
#endif
#if WCHAR_T_SIZE > 5
6,6,6,6
#else
1,1,1,1
#endif
};
unsigned mrt::wchar2lower(unsigned ch) {
int info = GetUniCharInfo(ch);
if (GetCaseType(info) & 0x02) {
return (wchar_t) (ch + GetDelta(info));
} else {
return ch;
}
}
unsigned mrt::wchar2upper(unsigned ch) {
int info = GetUniCharInfo(ch);
if (GetCaseType(info) & 0x04) {
return (wchar_t) (ch - GetDelta(info));
} else {
return ch;
}
}
const std::string::size_type mrt::utf8_length(const std::string &str) {
std::string::size_type size = 0, str_size = str.size();
for(std::string::size_type p = 0; p < str_size; ++p) {
std::string::value_type c = str[p];
if ((c & 0x80) == 0 || (c & 0xc0) != 0x80)
++size;
}
return size;
}
unsigned mrt::utf8_iterate(const std::string &str, size_t &start) {
if (start >= str.size())
return 0;
unsigned c0 = (unsigned char)str[start++];
if (c0 <= 0x7f)
return c0;
if (c0 == 0xc0 || c0 == 0xc1 || c0 >= 0xf5)
return '?';
if (start >= str.size())
return 0;
unsigned c1 = (unsigned char)str[start++];
if (c0 >= 0xc2 && c0 <= 0xdf)
return ((c0 & 0x1f) << 6) | (c1 & 0x3f);
if (start >= str.size())
return 0;
unsigned c2 = (unsigned char)str[start++];
if (c0 >= 0xe0 && c0 <= 0xef)
return ((c0 & 0x0f) << 12) | ((c1 & 0x3f) << 6) | (c2 & 0x3f);
if (start >= str.size())
return 0;
unsigned c3 = (unsigned char)str[start++];
if (c0 >= 0xf0 && c0 <= 0xf4)
return ((c0 & 0x07) << 18) | ((c1 & 0x3f) << 12) | ((c2 & 0x3f) << 6) | (c3 & 0x3f);
return '?';
}
void mrt::utf8_add_wchar(std::string &str, unsigned wchar) {
if (wchar <= 0x7f) {
str += (char)wchar;
} else if (wchar <= 0x7ff) {
str += (char) ((wchar >> 6) | 0xc0);
str += (char) ((wchar & 0x3f) | 0x80);
} else if (wchar <= 0xffff) {
str += (char)((wchar >> 12) | 0xe0);
str += (char)(((wchar & 0x0fc0) >> 6) | 0x80);
str += (char)( (wchar & 0x003f) | 0x80);
} else if (wchar <= 0x10ffff) {
str += (char)((wchar >> 18) | 0xf0);
str += (char)(((wchar & 0x03f000) >> 12) | 0x80);
str += (char)(((wchar & 0x000fc0) >> 6) | 0x80);
str += (char)( (wchar & 0x00003f) | 0x80);
} else
str += '?';
}
const size_t mrt::utf8_backspace(std::string &str, size_t pos) {
if (str.empty())
return 0;
if (pos > str.size())
pos = str.size();
int p;
for(p = (int)pos - 1; (p >= 0) && ((str[p] & 0xc0) == 0x80); --p) {}
if (p >= 0) {
std::string right;
if (pos < str.size())
right = str.substr(pos);
str = ((p > 0)?str.substr(0, p):std::string()) + right;
return p;
} else {
str.clear(); //p < 0
return 0;
}
}
const size_t mrt::utf8_left(const std::string &str, const size_t pos) {
if (pos == 0 || str.empty())
return 0;
int p;
for(p = (int)pos - 1; p >= 0 && (str[p] & 0xc0) == 0x80; --p) {}
return (p > 0)? p: 0;
}
const size_t mrt::utf8_right(const std::string &str, const size_t pos) {
if (str.empty())
return 0;
size_t p;
for(p = pos + 1; p < str.size() && (str[p] & 0xc0) == 0x80; ++p) {}
return p >= str.size()? str.size(): p;
}
void MRTAPI mrt::utf8_resize(std::string &str, const size_t max) {
std::string::size_type size = 0, str_size = str.size();
std::string::size_type p;
for(p = 0; p < str_size; ++p) {
std::string::value_type c = str[p];
if ((c & 0x80) == 0 || (c & 0xc0) != 0x80) {
++size;
if (size > max)
break;
}
}
str.resize(p);
}
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