53 lines
1.7 KiB
C
53 lines
1.7 KiB
C
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/*
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* Copyright (C) 1999-2000, 2016 Free Software Foundation, Inc.
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* This file is part of the GNU LIBICONV Library.
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*
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* The GNU LIBICONV Library is free software; you can redistribute it
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* and/or modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* The GNU LIBICONV Library is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
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* If not, see <https://www.gnu.org/licenses/>.
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*/
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/*
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* UCS-4-SWAPPED = UCS-4-INTERNAL with inverted endianness
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*/
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static int
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ucs4swapped_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
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{
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/* This function assumes that 'unsigned int' has exactly 32 bits. */
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if (sizeof(unsigned int) != 4) abort();
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if (n >= 4) {
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unsigned int x = *(const unsigned int *)s;
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x = (x >> 24) | ((x >> 8) & 0xff00) | ((x & 0xff00) << 8) | (x << 24);
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*pwc = x;
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return 4;
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}
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return RET_TOOFEW(0);
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}
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static int
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ucs4swapped_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
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{
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/* This function assumes that 'unsigned int' has exactly 32 bits. */
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if (sizeof(unsigned int) != 4) abort();
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if (n >= 4) {
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unsigned int x = wc;
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x = (x >> 24) | ((x >> 8) & 0xff00) | ((x & 0xff00) << 8) | (x << 24);
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*(unsigned int *)r = x;
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return 4;
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} else
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return RET_TOOSMALL;
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}
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