84 lines
2 KiB
C
84 lines
2 KiB
C
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
|
|
*
|
|
* GRUB 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.
|
|
*
|
|
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef GRUB_CHARSET_HEADER
|
|
#define GRUB_CHARSET_HEADER 1
|
|
|
|
/* Convert UTF-16 to UTF-8. */
|
|
static inline grub_uint8_t *
|
|
grub_utf16_to_utf8 (grub_uint8_t *dest, grub_uint16_t *src,
|
|
grub_size_t size)
|
|
{
|
|
grub_uint32_t code_high = 0;
|
|
|
|
while (size--)
|
|
{
|
|
grub_uint32_t code = *src++;
|
|
|
|
if (code_high)
|
|
{
|
|
if (code >= 0xDC00 && code <= 0xDFFF)
|
|
{
|
|
/* Surrogate pair. */
|
|
code = ((code_high - 0xD800) << 12) + (code - 0xDC00) + 0x10000;
|
|
|
|
*dest++ = (code >> 18) | 0xF0;
|
|
*dest++ = ((code >> 12) & 0x3F) | 0x80;
|
|
*dest++ = ((code >> 6) & 0x3F) | 0x80;
|
|
*dest++ = (code & 0x3F) | 0x80;
|
|
}
|
|
else
|
|
{
|
|
/* Error... */
|
|
*dest++ = '?';
|
|
}
|
|
|
|
code_high = 0;
|
|
}
|
|
else
|
|
{
|
|
if (code <= 0x007F)
|
|
*dest++ = code;
|
|
else if (code <= 0x07FF)
|
|
{
|
|
*dest++ = (code >> 6) | 0xC0;
|
|
*dest++ = (code & 0x3F) | 0x80;
|
|
}
|
|
else if (code >= 0xD800 && code <= 0xDBFF)
|
|
{
|
|
code_high = code;
|
|
continue;
|
|
}
|
|
else if (code >= 0xDC00 && code <= 0xDFFF)
|
|
{
|
|
/* Error... */
|
|
*dest++ = '?';
|
|
}
|
|
else
|
|
{
|
|
*dest++ = (code >> 12) | 0xE0;
|
|
*dest++ = ((code >> 6) & 0x3F) | 0x80;
|
|
*dest++ = (code & 0x3F) | 0x80;
|
|
}
|
|
}
|
|
}
|
|
|
|
return dest;
|
|
}
|
|
|
|
#endif
|