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/*
Brainuino Aleph
Copyright (C) 2012-2014 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 (const char* input)
{
_bytes = strlen(input);
_string = strdup(input);
_string_p = NULL;
_chars = 0;
for (_index = 0; _index < _bytes; _index++) {
if ((_string[_index] & 0x80) == 0x00) {
_chars++;
} else if ((_string[_index] & 0x20) == 0x00) {
_chars++;
_index ++;
} else if ((_string[_index] & 0x10) == 0x00) {
_chars++;
_index += 2;
} else if ((_string[_index] & 0x08) == 0x00) {
_chars++;
_index += 3;
}
}
_index = 0;
}
utf8::utf8 (const __FlashStringHelper* input)
{
_string_p = (char*) input;
_string = NULL;
_bytes = strlen_P(_string_p);
_chars = 0;
for (_index = 0; _index < _bytes; _index++) {
if ((pgm_read_byte(_string_p + _index) & 0x80) == 0x00) {
_chars++;
} else if ((pgm_read_byte(_string_p + _index) & 0x20) == 0x00) {
_chars++;
_index ++;
} else if ((pgm_read_byte(_string_p + _index) & 0x10) == 0x00) {
_chars++;
_index += 2;
} else if ((pgm_read_byte(_string_p + _index) & 0x08) == 0x00) {
_chars++;
_index += 3;
}
}
_index = 0;
}
utf8::~utf8 ()
{
if (_string != NULL)
free(_string);
}
wchar_t utf8::get()
{
wchar_t code;
if (_string_p == NULL) { // string in RAM
if ((_string[_index] & 0x80) == 0) {
code = wchar_t(_string[_index]);
_index++;
} else if ((_string[_index] & 0x20) == 0) {
code = wchar_t(_string[_index] & 0x1f) << 6 |
wchar_t(_string[_index+1] & 0x3f);
_index += 2;
} else if ((_string[_index] & 0x10) == 0) {
code = wchar_t(_string[_index] & 0x0f) << 12 |
wchar_t(_string[_index+1] & 0x3f) << 6 |
wchar_t(_string[_index+2] & 0x3f);
_index += 3;
} else if (((_string[_index] & 0x8) == 0) && (sizeof(code) >= 3)) {
code = wchar_t(_string[_index] & 0x07) << 18 |
wchar_t(_string[_index+1] & 0x3f) << 12 |
wchar_t(_string[_index+2] & 0x3f) << 6 |
wchar_t(_string[_index+3] & 0x3f);
} else {
code = '?';
_index++;
}
} else { // string in flash
byte first = pgm_read_byte(_string_p + _index);
if ((first & 0x80) == 0) {
code = wchar_t(first);
_index++;
} else if ((first & 0x20) == 0) {
code = wchar_t(first & 0x1f) << 6 |
wchar_t(pgm_read_byte(_string_p + _index + 1) & 0x3f);
_index += 2;
} else if ((first & 0x10) == 0) {
code = wchar_t(first & 0x0f) << 12 |
wchar_t(pgm_read_byte(_string_p + _index + 1) & 0x3f) << 6 |
wchar_t(pgm_read_byte(_string_p + _index + 2) & 0x3f);
_index += 3;
} else if (((first & 0x8) == 0) && (sizeof(code) >= 3)) {
code = wchar_t(first & 0x07) << 18 |
wchar_t(pgm_read_byte(_string_p + _index + 1) & 0x3f) << 12 |
wchar_t(pgm_read_byte(_string_p + _index + 2) & 0x3f) << 6 |
wchar_t(pgm_read_byte(_string_p + _index + 3) & 0x3f);
} else {
code = '?';
_index++;
}
}
if (_index >= _bytes) _index = 0;
return code;
}
uint16_t utf8::chars()
{
return _chars;
}
uint16_t utf8::bytes()
{
return _bytes;
}
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