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/*
* Copyright (C) 1999-2001, 2016, 2024 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 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.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
* If not, see <https://www.gnu.org/licenses/>.
*/
/*
* UTF-32LE
*/
/* Specification: Unicode 3.1 Standard Annex #19 */
static int
utf32le_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
{
if (n >= 4) {
ucs4_t wc = (ucs4_t) s[0]
+ ((ucs4_t) s[1] << 8)
+ ((ucs4_t) s[2] << 16)
+ ((ucs4_t) s[3] << 24);
if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) {
*pwc = wc;
return 4;
} else
return RET_ILSEQ;
}
return RET_TOOFEW(0);
}
static int
utf32le_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
{
if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) {
if (n >= 4) {
r[0] = (unsigned char) wc;
r[1] = (unsigned char) (wc >> 8);
r[2] = (unsigned char) (wc >> 16);
r[3] = 0;
return 4;
} else
return RET_TOOSMALL;
}
return RET_ILUNI;
}
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