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/* $Id: compat_getline.c,v 1.2 2020/06/15 01:37:14 schwarze Exp $ */
/*
* Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#include <sys/types.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
ssize_t
getline(char **buf, size_t *bufsz, FILE *fp)
{
char *nbuf;
size_t nbufsz, pos;
int c;
if (buf == NULL || bufsz == NULL) {
errno = EINVAL;
return -1;
}
if (*buf == NULL)
*bufsz = 0;
else
**buf = '\0';
pos = 0;
for (;;) {
if (pos + 1 >= *bufsz) {
nbufsz = *bufsz ? *bufsz * 2 : BUFSIZ;
if ((nbuf = realloc(*buf, nbufsz)) == NULL)
return -1;
*buf = nbuf;
*bufsz = nbufsz;
}
if ((c = fgetc(fp)) == EOF) {
(*buf)[pos] = '\0';
return pos > 0 && feof(fp) ? (ssize_t)pos : -1;
}
(*buf)[pos++] = c;
(*buf)[pos] = '\0';
if (c == '\n')
return pos;
}
}
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