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