1 /*- 2 * Copyright (c) 2002-2004 Tim J. Robbins. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "namespace.h" 31 #include <stdio.h> 32 #include <wchar.h> 33 #include "un-namespace.h" 34 #include "libc_private.h" 35 #include "local.h" 36 37 wchar_t * 38 fgetwln(FILE * __restrict fp, size_t *lenp) 39 { 40 wint_t wc; 41 size_t len; 42 43 FLOCKFILE(fp); 44 ORIENT(fp, 1); 45 46 len = 0; 47 while ((wc = __fgetwc(fp)) != WEOF) { 48 #define GROW 512 49 if (len * sizeof(wchar_t) >= fp->_lb._size && 50 __slbexpand(fp, (len + GROW) * sizeof(wchar_t))) 51 goto error; 52 *((wchar_t *)fp->_lb._base + len++) = wc; 53 if (wc == L'\n') 54 break; 55 } 56 if (len == 0) 57 goto error; 58 59 FUNLOCKFILE(fp); 60 *lenp = len; 61 return ((wchar_t *)fp->_lb._base); 62 63 error: 64 FUNLOCKFILE(fp); 65 *lenp = 0; 66 return (NULL); 67 } 68