1ea2741973acd73619da693548388a05527b92d57David Chisnall/*- 2ea2741973acd73619da693548388a05527b92d57David Chisnall * Copyright (c) 2002-2004 Tim J. Robbins. 3ea2741973acd73619da693548388a05527b92d57David Chisnall * 4ea2741973acd73619da693548388a05527b92d57David Chisnall * Redistribution and use in source and binary forms, with or without 5ea2741973acd73619da693548388a05527b92d57David Chisnall * modification, are permitted provided that the following conditions 6ea2741973acd73619da693548388a05527b92d57David Chisnall * are met: 7ea2741973acd73619da693548388a05527b92d57David Chisnall * 1. Redistributions of source code must retain the above copyright 8ea2741973acd73619da693548388a05527b92d57David Chisnall * notice, this list of conditions and the following disclaimer. 9ea2741973acd73619da693548388a05527b92d57David Chisnall * 2. Redistributions in binary form must reproduce the above copyright 10ea2741973acd73619da693548388a05527b92d57David Chisnall * notice, this list of conditions and the following disclaimer in the 11ea2741973acd73619da693548388a05527b92d57David Chisnall * documentation and/or other materials provided with the distribution. 12ea2741973acd73619da693548388a05527b92d57David Chisnall * 13ea2741973acd73619da693548388a05527b92d57David Chisnall * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14ea2741973acd73619da693548388a05527b92d57David Chisnall * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15ea2741973acd73619da693548388a05527b92d57David Chisnall * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16ea2741973acd73619da693548388a05527b92d57David Chisnall * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17ea2741973acd73619da693548388a05527b92d57David Chisnall * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18ea2741973acd73619da693548388a05527b92d57David Chisnall * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19ea2741973acd73619da693548388a05527b92d57David Chisnall * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20ea2741973acd73619da693548388a05527b92d57David Chisnall * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21ea2741973acd73619da693548388a05527b92d57David Chisnall * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22ea2741973acd73619da693548388a05527b92d57David Chisnall * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23ea2741973acd73619da693548388a05527b92d57David Chisnall * SUCH DAMAGE. 24ea2741973acd73619da693548388a05527b92d57David Chisnall */ 25ea2741973acd73619da693548388a05527b92d57David Chisnall 26ea2741973acd73619da693548388a05527b92d57David Chisnall 27ea2741973acd73619da693548388a05527b92d57David Chisnallsize_t 28ea2741973acd73619da693548388a05527b92d57David Chisnallwcsnrtombs_l(char * __restrict dst, const wchar_t ** __restrict src, 29ea2741973acd73619da693548388a05527b92d57David Chisnall size_t nwc, size_t len, mbstate_t * __restrict ps, locale_t loc) 30ea2741973acd73619da693548388a05527b92d57David Chisnall{ 31ea2741973acd73619da693548388a05527b92d57David Chisnall FIX_LOCALE(loc); 32ea2741973acd73619da693548388a05527b92d57David Chisnall mbstate_t mbsbak; 33ea2741973acd73619da693548388a05527b92d57David Chisnall char buf[MB_CUR_MAX_L(loc)]; 34ea2741973acd73619da693548388a05527b92d57David Chisnall const wchar_t *s; 35ea2741973acd73619da693548388a05527b92d57David Chisnall size_t nbytes; 36ea2741973acd73619da693548388a05527b92d57David Chisnall size_t nb; 37ea2741973acd73619da693548388a05527b92d57David Chisnall 38ea2741973acd73619da693548388a05527b92d57David Chisnall s = *src; 39ea2741973acd73619da693548388a05527b92d57David Chisnall nbytes = 0; 40ea2741973acd73619da693548388a05527b92d57David Chisnall 41ea2741973acd73619da693548388a05527b92d57David Chisnall if (dst == NULL) { 42ea2741973acd73619da693548388a05527b92d57David Chisnall while (nwc-- > 0) { 43ea2741973acd73619da693548388a05527b92d57David Chisnall if ((nb = wcrtomb_l(buf, *s, ps, loc)) == (size_t)-1) 44ea2741973acd73619da693548388a05527b92d57David Chisnall /* Invalid character - wcrtomb() sets errno. */ 45ea2741973acd73619da693548388a05527b92d57David Chisnall return ((size_t)-1); 46ea2741973acd73619da693548388a05527b92d57David Chisnall else if (*s == L'\0') 47ea2741973acd73619da693548388a05527b92d57David Chisnall return (nbytes + nb - 1); 48ea2741973acd73619da693548388a05527b92d57David Chisnall s++; 49ea2741973acd73619da693548388a05527b92d57David Chisnall nbytes += nb; 50ea2741973acd73619da693548388a05527b92d57David Chisnall } 51ea2741973acd73619da693548388a05527b92d57David Chisnall return (nbytes); 52ea2741973acd73619da693548388a05527b92d57David Chisnall } 53ea2741973acd73619da693548388a05527b92d57David Chisnall 54ea2741973acd73619da693548388a05527b92d57David Chisnall while (len > 0 && nwc-- > 0) { 55ea2741973acd73619da693548388a05527b92d57David Chisnall if (len > (size_t)MB_CUR_MAX_L(loc)) { 56ea2741973acd73619da693548388a05527b92d57David Chisnall /* Enough space to translate in-place. */ 57ea2741973acd73619da693548388a05527b92d57David Chisnall if ((nb = wcrtomb_l(dst, *s, ps, loc)) == (size_t)-1) { 58ea2741973acd73619da693548388a05527b92d57David Chisnall *src = s; 59ea2741973acd73619da693548388a05527b92d57David Chisnall return ((size_t)-1); 60ea2741973acd73619da693548388a05527b92d57David Chisnall } 61ea2741973acd73619da693548388a05527b92d57David Chisnall } else { 62ea2741973acd73619da693548388a05527b92d57David Chisnall /* 63ea2741973acd73619da693548388a05527b92d57David Chisnall * May not be enough space; use temp. buffer. 64ea2741973acd73619da693548388a05527b92d57David Chisnall * 65ea2741973acd73619da693548388a05527b92d57David Chisnall * We need to save a copy of the conversion state 66ea2741973acd73619da693548388a05527b92d57David Chisnall * here so we can restore it if the multibyte 67ea2741973acd73619da693548388a05527b92d57David Chisnall * character is too long for the buffer. 68ea2741973acd73619da693548388a05527b92d57David Chisnall */ 69ea2741973acd73619da693548388a05527b92d57David Chisnall mbsbak = *ps; 70ea2741973acd73619da693548388a05527b92d57David Chisnall if ((nb = wcrtomb_l(buf, *s, ps, loc)) == (size_t)-1) { 71ea2741973acd73619da693548388a05527b92d57David Chisnall *src = s; 72ea2741973acd73619da693548388a05527b92d57David Chisnall return ((size_t)-1); 73ea2741973acd73619da693548388a05527b92d57David Chisnall } 74ea2741973acd73619da693548388a05527b92d57David Chisnall if (nb > (int)len) { 75ea2741973acd73619da693548388a05527b92d57David Chisnall /* MB sequence for character won't fit. */ 76ea2741973acd73619da693548388a05527b92d57David Chisnall *ps = mbsbak; 77ea2741973acd73619da693548388a05527b92d57David Chisnall break; 78ea2741973acd73619da693548388a05527b92d57David Chisnall } 79ea2741973acd73619da693548388a05527b92d57David Chisnall memcpy(dst, buf, nb); 80ea2741973acd73619da693548388a05527b92d57David Chisnall } 81ea2741973acd73619da693548388a05527b92d57David Chisnall if (*s == L'\0') { 82ea2741973acd73619da693548388a05527b92d57David Chisnall *src = NULL; 83ea2741973acd73619da693548388a05527b92d57David Chisnall return (nbytes + nb - 1); 84ea2741973acd73619da693548388a05527b92d57David Chisnall } 85ea2741973acd73619da693548388a05527b92d57David Chisnall s++; 86ea2741973acd73619da693548388a05527b92d57David Chisnall dst += nb; 87ea2741973acd73619da693548388a05527b92d57David Chisnall len -= nb; 88ea2741973acd73619da693548388a05527b92d57David Chisnall nbytes += nb; 89ea2741973acd73619da693548388a05527b92d57David Chisnall } 90ea2741973acd73619da693548388a05527b92d57David Chisnall *src = s; 91ea2741973acd73619da693548388a05527b92d57David Chisnall return (nbytes); 92ea2741973acd73619da693548388a05527b92d57David Chisnall} 93ea2741973acd73619da693548388a05527b92d57David Chisnall 94