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 int sret; 49 wchar_t *wsp; 50 size_t nconv; 51 const char *src; 52 unsigned char *nl; 53 FIX_LOCALE(locale); 54 struct xlocale_ctype *l = XLOCALE_CTYPE(locale); 55 56 FLOCKFILE(fp); 57 ORIENT(fp, 1); 58 59 if (n <= 0) { 60 fp->_flags |= __SERR; 61 errno = EINVAL; 62 goto error; 63 } 64 65 wsp = ws; 66 if (n == 1) 67 goto ok; 68 69 if (fp->_r <= 0 && __srefill(fp)) 70 /* EOF or ferror */ 71 goto error; 72 73 sret = 0; 74 do { 75 src = fp->_p; 76 nl = memchr(fp->_p, '\n', fp->_r); 77 nconv = l->__mbsnrtowcs(wsp, &src, 78 nl != NULL ? (nl - fp->_p + 1) : fp->_r, 79 n - 1, &fp->_mbstate); 80 if (nconv == (size_t)-1) { 81 /* Conversion error */ 82 fp->_flags |= __SERR; 83 goto error; 84 } 85 if (src == NULL) { 86 /* 87 * We hit a null byte. Increment the character count, 88 * since mbsnrtowcs()'s return value doesn't include 89 * the terminating null, then resume conversion 90 * after the null. 91 */ 92 nconv++; 93 src = memchr(fp->_p, '\0', fp->_r); 94 src++; 95 } 96 fp->_r -= (unsigned char *)src - fp->_p; 97 fp->_p = (unsigned char *)src; 98 n -= nconv; 99 wsp += nconv; 100 } while ((wsp == ws || wsp[-1] != L'\n') && n > 1 && (fp->_r > 0 || 101 (sret = __srefill(fp)) == 0)); 102 if (sret && !__sfeof(fp)) 103 /* ferror */ 104 goto error; 105 if (!l->__mbsinit(&fp->_mbstate)) { 106 /* Incomplete character */ 107 fp->_flags |= __SERR; 108 errno = EILSEQ; 109 goto error; 110 } 111 if (wsp == ws) 112 /* EOF */ 113 goto error; 114 ok: 115 *wsp = L'\0'; 116 FUNLOCKFILE(fp); 117 return (ws); 118 119 error: 120 FUNLOCKFILE(fp); 121 return (NULL); 122 } 123 124 wchar_t * 125 fgetws(wchar_t * __restrict ws, int n, FILE * __restrict fp) 126 { 127 return fgetws_l(ws, n, fp, __get_locale()); 128 } 129