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