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/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
// FreeBSD POSIX2008 getline
#ifndef _WITH_GETLINE
#define _WITH_GETLINE
#endif
#include "contrib/getline.h"
#include <stdio.h> // getline or fgetln
#include <stdlib.h> // free
#include <string.h> // memcpy
ssize_t knot_getline(char **lineptr, size_t *n, FILE *stream)
{
#ifdef HAVE_GETLINE
return getline(lineptr, n, stream);
#else
#ifdef HAVE_FGETLN
size_t length = 0;
char *buffer = fgetln(stream, &length);
if (buffer == NULL) {
return -1;
}
/* NOTE: Function fgetln doesn't return terminated string!
* Output buffer from the fgetln can't be freed.
*/
// If the output buffer is not specified or is small, extend it.
if (*lineptr == NULL || *n <= length) {
char *tmp = realloc(*lineptr, length + 1);
if (tmp == NULL) {
return -1;
}
*lineptr = tmp;
*n = length + 1;
}
memcpy(*lineptr, buffer, length);
(*lineptr)[length] = '\0';
return length;
#endif
#endif
}
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