libraries: fgetln() from pkgsrc branch.
This commit is contained in:
parent
6bc21b6992
commit
f60593cc35
|
@ -53,6 +53,7 @@ SRCS+= \
|
|||
flock.c \
|
||||
fslib.c \
|
||||
fts.c \
|
||||
fgetln.c \
|
||||
fsversion.c \
|
||||
getgrent.c \
|
||||
getlogin.c \
|
||||
|
|
81
lib/libc/other/fgetln.c
Normal file
81
lib/libc/other/fgetln.c
Normal file
|
@ -0,0 +1,81 @@
|
|||
/* $NetBSD: fgetln.c,v 1.5 2008/04/29 05:46:08 martin Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 1998 The NetBSD Foundation, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to The NetBSD Foundation
|
||||
* by Christos Zoulas.
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <errno.h>
|
||||
|
||||
/*
|
||||
* XXX: This implementation doesn't quite conform to the specification
|
||||
* in the man page, in that it only manages one buffer at all, not one
|
||||
* per stdio stream. Since the previous implementation did the same,
|
||||
* this won't break anything new.
|
||||
*/
|
||||
char *
|
||||
fgetln(fp, len)
|
||||
FILE *fp;
|
||||
size_t *len;
|
||||
{
|
||||
static char *buf = NULL;
|
||||
static size_t bufsiz = 0;
|
||||
static size_t buflen = 0;
|
||||
int c;
|
||||
|
||||
if (buf == NULL) {
|
||||
bufsiz = BUFSIZ;
|
||||
if ((buf = malloc(bufsiz)) == NULL)
|
||||
return NULL;
|
||||
}
|
||||
|
||||
buflen = 0;
|
||||
while ((c = fgetc(fp)) != EOF) {
|
||||
if (buflen >= bufsiz) {
|
||||
size_t nbufsiz = bufsiz + BUFSIZ;
|
||||
char *nbuf = realloc(buf, nbufsiz);
|
||||
|
||||
if (nbuf == NULL) {
|
||||
int oerrno = errno;
|
||||
free(buf);
|
||||
errno = oerrno;
|
||||
buf = NULL;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
buf = nbuf;
|
||||
bufsiz = nbufsiz;
|
||||
}
|
||||
buf[buflen++] = c;
|
||||
if (c == '\n')
|
||||
break;
|
||||
}
|
||||
*len = buflen;
|
||||
return buflen == 0 ? NULL : buf;
|
||||
}
|
Loading…
Reference in a new issue