60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/*
|
|
* Copyright (C) 1999-2001 Free Software Foundation, Inc.
|
|
* This file is part of the GNU LIBICONV Library.
|
|
*
|
|
* The GNU LIBICONV Library is free software; you can redistribute it
|
|
* and/or modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* The GNU LIBICONV 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
|
|
* If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
/*
|
|
* UCS-2-SWAPPED = UCS-2-INTERNAL with inverted endianness
|
|
*/
|
|
|
|
static int
|
|
ucs2swapped_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
|
|
{
|
|
/* This function assumes that 'unsigned short' has exactly 16 bits. */
|
|
if (sizeof(unsigned short) != 2) abort();
|
|
|
|
if (n >= 2) {
|
|
unsigned short x = *(const unsigned short *)s;
|
|
x = (x >> 8) | (x << 8);
|
|
if (x >= 0xd800 && x < 0xe000) {
|
|
return RET_ILSEQ;
|
|
} else {
|
|
*pwc = x;
|
|
return 2;
|
|
}
|
|
}
|
|
return RET_TOOFEW(0);
|
|
}
|
|
|
|
static int
|
|
ucs2swapped_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
|
|
{
|
|
/* This function assumes that 'unsigned short' has exactly 16 bits. */
|
|
if (sizeof(unsigned short) != 2) abort();
|
|
|
|
if (wc < 0x10000 && !(wc >= 0xd800 && wc < 0xe000)) {
|
|
if (n >= 2) {
|
|
unsigned short x = wc;
|
|
x = (x >> 8) | (x << 8);
|
|
*(unsigned short *)r = x;
|
|
return 2;
|
|
} else
|
|
return RET_TOOSMALL;
|
|
} else
|
|
return RET_ILUNI;
|
|
}
|