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 <limits.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <wchar.h> 33 #include "mblocal.h" 34 35 size_t 36 wcsnrtombs(char *_RESTRICT_KYWD dst, const wchar_t **_RESTRICT_KYWD src, 37 size_t nwc, size_t len, mbstate_t *_RESTRICT_KYWD ps) 38 { 39 static mbstate_t mbs; 40 41 if (ps == NULL) 42 ps = &mbs; 43 return (__wcsnrtombs(dst, src, nwc, len, ps)); 44 } 45 46 size_t 47 __wcsnrtombs_std(char *_RESTRICT_KYWD dst, const wchar_t **_RESTRICT_KYWD src, 48 size_t nwc, size_t len, mbstate_t *_RESTRICT_KYWD ps) 49 { 50 mbstate_t mbsbak; 51 char buf[MB_LEN_MAX]; 52 const wchar_t *s; 53 size_t nbytes; 54 size_t nb; 55 56 s = *src; 57 nbytes = 0; 58 59 if (dst == NULL) { 60 while (nwc-- > 0) { 61 if ((nb = __wcrtomb(buf, *s, ps)) == (size_t)-1) 62 /* Invalid character - wcrtomb() sets errno. */ 63 return ((size_t)-1); 64 else if (*s == L'\0') 65 return (nbytes + nb - 1); 66 s++; 67 nbytes += nb; 68 } 69 return (nbytes); 70 } 71 72 while (len > 0 && nwc-- > 0) { 73 if (len > (size_t)MB_CUR_MAX) { 74 /* Enough space to translate in-place. */ 75 if ((nb = __wcrtomb(dst, *s, ps)) == (size_t)-1) { 76 *src = s; 77 return ((size_t)-1); 78 } 79 } else { 80 /* 81 * May not be enough space; use temp. buffer. 82 * 83 * We need to save a copy of the conversion state 84 * here so we can restore it if the multibyte 85 * character is too long for the buffer. 86 */ 87 mbsbak = *ps; 88 if ((nb = __wcrtomb(buf, *s, ps)) == (size_t)-1) { 89 *src = s; 90 return ((size_t)-1); 91 } 92 if (nb > (int)len) { 93 /* MB sequence for character won't fit. */ 94 *ps = mbsbak; 95 break; 96 } 97 (void) memcpy(dst, buf, nb); 98 } 99 if (*s == L'\0') { 100 *src = NULL; 101 return (nbytes + nb - 1); 102 } 103 s++; 104 dst += nb; 105 len -= nb; 106 nbytes += nb; 107 } 108 *src = s; 109 return (nbytes); 110 } 111