+++ /dev/null
-/*-
- * Copyright (c) 1990, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Chris Torek.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)fgets.c 8.2 (Berkeley) 12/22/93";
-#endif /* LIBC_SCCS and not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/stdio/fgets.c,v 1.13 2002/08/13 09:30:41 tjr Exp $");
-
-#include "namespace.h"
-#include <stdio.h>
-#include <string.h>
-#include "un-namespace.h"
-#include "local.h"
-#include "libc_private.h"
-
-/*
- * Read at most n-1 characters from the given file.
- * Stop when a newline has been read, or the count runs out.
- * Return first argument, or NULL if no characters were read.
- */
-char *
-fgets(buf, n, fp)
- char *buf;
- int n;
- FILE *fp;
-{
- size_t len;
- char *s;
- unsigned char *p, *t;
-
- if (n <= 0) /* sanity check */
- return (NULL);
-
- FLOCKFILE(fp);
- ORIENT(fp, -1);
- s = buf;
- n--; /* leave space for NUL */
- while (n != 0) {
- /*
- * If the buffer is empty, refill it.
- */
- if ((len = fp->_r) <= 0) {
- if (__srefill(fp)) {
- /* EOF/error: stop with partial or no line */
- if (s == buf) {
- FUNLOCKFILE(fp);
- return (NULL);
- }
- break;
- }
- len = fp->_r;
- }
- p = fp->_p;
-
- /*
- * Scan through at most n bytes of the current buffer,
- * looking for '\n'. If found, copy up to and including
- * newline, and stop. Otherwise, copy entire chunk
- * and loop.
- */
- if (len > n)
- len = n;
- t = memchr((void *)p, '\n', len);
- if (t != NULL) {
- len = ++t - p;
- fp->_r -= len;
- fp->_p = t;
- (void)memcpy((void *)s, (void *)p, len);
- s[len] = 0;
- FUNLOCKFILE(fp);
- return (buf);
- }
- fp->_r -= len;
- fp->_p += len;
- (void)memcpy((void *)s, (void *)p, len);
- s += len;
- n -= len;
- }
- *s = 0;
- FUNLOCKFILE(fp);
- return (buf);
-}
projects / apple / libc.git / blobdiff