nexmon – Blame information for rev 1

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1 office 1 /*
2 * Copyright (C) 1999-2001 Free Software Foundation, Inc.
3 * This file is part of the GNU LIBICONV Library.
4 *
5 * The GNU LIBICONV Library is free software; you can redistribute it
6 * and/or modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * The GNU LIBICONV Library is distributed in the hope that it will be
11 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public
16 * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
17 * If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
18 * Fifth Floor, Boston, MA 02110-1301, USA.
19 */
20  
21 /*
22 * UCS-2-SWAPPED = UCS-2-INTERNAL with inverted endianness
23 */
24  
25 static int
26 ucs2swapped_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
27 {
28 /* This function assumes that 'unsigned short' has exactly 16 bits. */
29 if (sizeof(unsigned short) != 2) abort();
30  
31 if (n >= 2) {
32 unsigned short x = *(const unsigned short *)s;
33 x = (x >> 8) | (x << 8);
34 if (x >= 0xd800 && x < 0xe000) {
35 return RET_ILSEQ;
36 } else {
37 *pwc = x;
38 return 2;
39 }
40 }
41 return RET_TOOFEW(0);
42 }
43  
44 static int
45 ucs2swapped_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
46 {
47 /* This function assumes that 'unsigned short' has exactly 16 bits. */
48 if (sizeof(unsigned short) != 2) abort();
49  
50 if (wc < 0x10000 && !(wc >= 0xd800 && wc < 0xe000)) {
51 if (n >= 2) {
52 unsigned short x = wc;
53 x = (x >> 8) | (x << 8);
54 *(unsigned short *)r = x;
55 return 2;
56 } else
57 return RET_TOOSMALL;
58 } else
59 return RET_ILUNI;
60 }