| David Chisnall | 06af2bb | 2012-02-29 13:17:28 +0000 | [diff] [blame] | 1 | |
| 2 | |
| 3 | /*- |
| 4 | * As noted in the source, some portions of this implementation are copied from |
| 5 | * FreeBSD libc. These are covered by the following copyright: |
| 6 | * |
| 7 | * Copyright (c) 2002-2004 Tim J. Robbins. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 28 | * SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | size_t |
| 32 | mbsnrtowcs_l(wchar_t * __restrict dst, const char ** __restrict src, |
| 33 | size_t nms, size_t len, mbstate_t * __restrict ps, locale_t loc) |
| 34 | { |
| 35 | const char *s; |
| 36 | size_t nchr; |
| 37 | wchar_t wc; |
| 38 | size_t nb; |
| 39 | FIX_LOCALE(loc); |
| 40 | |
| 41 | s = *src; |
| 42 | nchr = 0; |
| 43 | |
| 44 | if (dst == NULL) { |
| 45 | for (;;) { |
| 46 | if ((nb = mbrtowc_l(&wc, s, nms, ps, loc)) == (size_t)-1) |
| 47 | /* Invalid sequence - mbrtowc() sets errno. */ |
| 48 | return ((size_t)-1); |
| 49 | else if (nb == 0 || nb == (size_t)-2) |
| 50 | return (nchr); |
| 51 | s += nb; |
| 52 | nms -= nb; |
| 53 | nchr++; |
| 54 | } |
| 55 | /*NOTREACHED*/ |
| 56 | } |
| 57 | |
| 58 | while (len-- > 0) { |
| 59 | if ((nb = mbrtowc_l(dst, s, nms, ps, loc)) == (size_t)-1) { |
| 60 | *src = s; |
| 61 | return ((size_t)-1); |
| 62 | } else if (nb == (size_t)-2) { |
| 63 | *src = s + nms; |
| 64 | return (nchr); |
| 65 | } else if (nb == 0) { |
| 66 | *src = NULL; |
| 67 | return (nchr); |
| 68 | } |
| 69 | s += nb; |
| 70 | nms -= nb; |
| 71 | nchr++; |
| 72 | dst++; |
| 73 | } |
| 74 | *src = s; |
| 75 | return (nchr); |
| 76 | } |