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/* $NetBSD: getline.c,v 1.2 2015/12/25 20:12:46 joerg Exp $ */
/* NetBSD-src: getline.c,v 1.2 2014/09/16 17:23:50 christos Exp */
/*-
* Copyright (c) 2011 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 "my_getline.h"
ssize_t
getdelim
(char **buf
, size_t *bufsiz
, int delimiter
, FILE
*fp
)
{
char *ptr
, *eptr
;
if (*buf
== NULL
|| *bufsiz
== 0) {
*bufsiz
= BUFSIZ
;
if ((*buf
= malloc(*bufsiz
)) == NULL
)
return -1;
}
for (ptr
= *buf
, eptr
= *buf
+ *bufsiz
;;) {
int c
= fgetc(fp
);
if (c
== -1) {
if (feof(fp
)) {
ssize_t diff
= (ssize_t
)(ptr
- *buf
);
if (diff
!= 0) {
*ptr
= '\0';
return diff
;
}
}
return -1;
}
*ptr
++ = c
;
if (c
== delimiter
) {
*ptr
= '\0';
return ptr
- *buf
;
}
if (ptr
+ 2 >= eptr
) {
char *nbuf
;
size_t nbufsiz
= *bufsiz
* 2;
ssize_t d
= ptr
- *buf
;
if ((nbuf
= realloc(*buf
, nbufsiz
)) == NULL
)
return -1;
*buf
= nbuf
;
*bufsiz
= nbufsiz
;
eptr
= nbuf
+ nbufsiz
;
ptr
= nbuf
+ d
;
}
}
}
ssize_t
getline
(char **buf
, size_t *bufsiz
, FILE
*fp
)
{
return getdelim
(buf
, bufsiz
, '\n', fp
);
}