1 /*- 2 * Copyright (c) 2002-2004 Tim J. Robbins. 3 * All rights reserved. 4 * 5 * Copyright (c) 2011 The FreeBSD Foundation 6 * All rights reserved. 7 * Portions of this software were developed by David Chisnall 8 * under sponsorship from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "namespace.h" 36 #include <errno.h> 37 #include <stdio.h> 38 #include <string.h> 39 #include <wchar.h> 40 #include "un-namespace.h" 41 #include "libc_private.h" 42 #include "local.h" 43 #include "mblocal.h" 44 45 wchar_t * 46 fgetws_l(wchar_t * __restrict ws, int n, FILE * __restrict fp, locale_t locale) 47 { 48 wchar_t *wsp; 49 size_t nconv; 50 const char *src; 51 unsigned char *nl; 52 FIX_LOCALE(locale); 53 struct xlocale_ctype *l = XLOCALE_CTYPE(locale); 54 55 FLOCKFILE(fp); 56 ORIENT(fp, 1); 57 58 if (n <= 0) { 59 errno = EINVAL; 60 goto error; 61 } 62 63 if (fp->_r <= 0 && __srefill(fp)) 64 /* EOF */ 65 goto error; 66 wsp = ws; 67 do { 68 src = fp->_p; 69 nl = memchr(fp->_p, '\n', fp->_r); 70 nconv = l->__mbsnrtowcs(wsp, &src, 71 nl != NULL ? (nl - fp->_p + 1) : fp->_r, 72 n - 1, &fp->_mbstate); 73 if (nconv == (size_t)-1) 74 /* Conversion error */ 75 goto error; 76 if (src == NULL) { 77 /* 78 * We hit a null byte. Increment the character count, 79 * since mbsnrtowcs()'s return value doesn't include 80 * the terminating null, then resume conversion 81 * after the null. 82 */ 83 nconv++; 84 src = memchr(fp->_p, '\0', fp->_r); 85 src++; 86 } 87 fp->_r -= (unsigned char *)src - fp->_p; 88 fp->_p = (unsigned char *)src; 89 n -= nconv; 90 wsp += nconv; 91 } while (wsp[-1] != L'\n' && n > 1 && (fp->_r > 0 || 92 __srefill(fp) == 0)); 93 if (wsp == ws) 94 /* EOF */ 95 goto error; 96 if (!l->__mbsinit(&fp->_mbstate)) 97 /* Incomplete character */ 98 goto error; 99 *wsp = L'\0'; 100 FUNLOCKFILE(fp); 101 102 return (ws); 103 104 error: 105 FUNLOCKFILE(fp); 106 return (NULL); 107 } 108 wchar_t * 109 fgetws(wchar_t * __restrict ws, int n, FILE * __restrict fp) 110 { 111 return fgetws_l(ws, n, fp, __get_locale()); 112 } 113