1 /* 2 * Copyright (c) 2002-2004 Tim J. Robbins. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 29 * Use is subject to license terms. 30 */ 31 32 #include "lint.h" 33 #include <errno.h> 34 #include <limits.h> 35 #include <stdlib.h> 36 #include <wchar.h> 37 #include "mblocal.h" 38 39 size_t 40 mbsnrtowcs(wchar_t *_RESTRICT_KYWD dst, const char **_RESTRICT_KYWD src, 41 size_t nms, size_t len, mbstate_t *_RESTRICT_KYWD ps) 42 { 43 static mbstate_t mbs; 44 45 if (ps == NULL) 46 ps = &mbs; 47 return (__mbsnrtowcs(dst, src, nms, len, ps)); 48 } 49 50 size_t 51 __mbsnrtowcs_std(wchar_t *_RESTRICT_KYWD dst, const char **_RESTRICT_KYWD src, 52 size_t nms, size_t len, mbstate_t *_RESTRICT_KYWD ps) 53 { 54 const char *s; 55 size_t nchr; 56 wchar_t wc; 57 size_t nb; 58 59 s = *src; 60 nchr = 0; 61 62 if (dst == NULL) { 63 for (;;) { 64 if ((nb = __mbrtowc(&wc, s, nms, ps)) == (size_t)-1) 65 /* Invalid sequence - mbrtowc() sets errno. */ 66 return ((size_t)-1); 67 else if (nb == 0 || nb == (size_t)-2) 68 return (nchr); 69 s += nb; 70 nms -= nb; 71 nchr++; 72 } 73 /*NOTREACHED*/ 74 } 75 76 while (len-- > 0) { 77 if ((nb = __mbrtowc(dst, s, nms, ps)) == (size_t)-1) { 78 *src = s; 79 return ((size_t)-1); 80 } else if (nb == (size_t)-2) { 81 *src = s + nms; 82 return (nchr); 83 } else if (nb == 0) { 84 *src = NULL; 85 return (nchr); 86 } 87 s += nb; 88 nms -= nb; 89 nchr++; 90 dst++; 91 } 92 *src = s; 93 return (nchr); 94 } 95