1 /*- 2 * Copyright (c) 2002 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 <errno.h> 32 #include <rune.h> 33 #include <stdio.h> 34 #include <wchar.h> 35 #include "un-namespace.h" 36 #include "libc_private.h" 37 #include "local.h" 38 39 wchar_t * 40 fgetws(wchar_t * __restrict ws, int n, FILE * __restrict fp) 41 { 42 wchar_t *wsp; 43 long r; 44 45 ORIENTLOCK(fp, 1); 46 47 if (n <= 0) 48 return (NULL); 49 50 wsp = ws; 51 while (n-- > 1) { 52 /* XXX Inefficient */ 53 if ((r = fgetrune(fp)) == _INVALID_RUNE) { 54 errno = EILSEQ; 55 return (NULL); 56 } 57 if (r == EOF) { 58 if (wsp == ws) 59 /* EOF/error, no characters read yet. */ 60 return (NULL); 61 break; 62 } 63 *wsp++ = (wchar_t)r; 64 if (r == L'\n') 65 break; 66 } 67 *wsp++ = L'\0'; 68 69 return (ws); 70 } 71