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/*
Brainuino Aleph
Copyright (C) 2012 Dmitry Mikhirev
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://www.gnu.org/licenses/>.
*/
#include "utf8.h"
#include <string.h>
utf8::utf8 (char* string)
{
bytes = strlen(string);
_string = (char *)malloc(bytes + 1);
strcpy(_string, string);
chars = 0;
for (_index = 0; _index < bytes; _index++) {
if (_string[_index] & 0x80 == 0) {
chars++;
} else if (_string[_index] & 0x20 == 0) {
chars += 2;
_index++;
} else if (_string[_index] & 0x10 == 0) {
chars += 3;
_index += 2;
} else if (_string[_index] & 0x8 == 0) {
chars += 4;
_index += 3;
}
}
_index = 0;
}
int32_t utf8::get()
{
int32_t code;
if (_string[_index] & 0x80 == 0) {
code = int32_t(_string[_index]);
_index++;
} else if (_string[_index] & 0x20 == 0) {
code = int32_t(_string[_index] & 0x1f) << 6 | int32_t(_string[_index+1] & 0x3f);
_index += 2;
} else if (_string[_index] & 0x10 == 0) {
code = int32_t(_string[_index] & 0xf) << 12 | int32_t(_string[_index+1] & 0x3f) << 6 | int32_t(_string[_index+2] & 0x3f);
_index += 3;
} else if (_string[_index] & 0x8 == 0) {
code = int32_t(_string[_index] & 0x7) << 18 | int32_t(_string[_index+1] & 0x3f) << 12 | int32_t(_string[_index+2] & 0x3f) << 6 | int32_t(_string[_index+3] & 0x3f);
}
if (_index > bytes) _index = 0;
return code;
}
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