60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/* $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;
|
|
}
|
|
}
|