1 /* Copyright (C) 1996 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 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.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
28 /* We don't need the state really because we don't have shift states
29 to maintain between calls to this function. */
30 static mbstate_t internal;
32 /* This is a non-standard function but it is very useful in the
33 implementation of stdio because we have to deal with unterminated
34 buffers. At most NMC bytes will be converted. */
36 __mbsnrtowcs (dst, src, nmc, len, ps)
44 const char *run = *src;
45 const char *last = run + nmc;
51 /* The LEN parameter has to be ignored if we don't actually write
56 while (written < len && run < last)
60 unsigned char byte = *run++;
62 /* We expect a start of a new multibyte character. */
65 /* One byte sequence. */
69 else if ((byte & 0xe0) == 0xc0)
74 else if ((byte & 0xf0) == 0xe0)
76 /* We expect three bytes. */
80 else if ((byte & 0xf8) == 0xf0)
82 /* We expect four bytes. */
86 else if ((byte & 0xfc) == 0xf8)
88 /* We expect five bytes. */
92 else if ((byte & 0xfe) == 0xfc)
94 /* We expect six bytes. */
100 /* This is an illegal encoding. */
105 /* Read the possible remaining bytes. */
110 if ((byte & 0xc0) != 0x80)
112 /* This is an illegal encoding. */
118 value |= byte & 0x3f;
121 /* Store value is required. */
125 /* The whole sequence is read. Check whether end of string is
129 /* Found the end of the string. */
134 /* Increment counter of produced words. */
138 /* Store address of next byte to process. */
143 weak_alias (__mbsnrtowcs, mbsnrtowcs)