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getline.c
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getline.c
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/*
$Id:
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 2 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, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include "getline.h"
ssize_t getline(char **lineptr, size_t *n, FILE *stream)
{
char *ptr;
ptr = fgetln(stream, n);
if (ptr == NULL) {
return -1;
}
/* Free the original ptr */
if (*lineptr != NULL) free(*lineptr);
/* Add one more space for '\0' */
size_t len = n[0] + 1;
/* Update the length */
n[0] = len;
/* Allocate a new buffer */
*lineptr = malloc(len);
/* Copy over the string */
memcpy(*lineptr, ptr, len-1);
/* Write the NULL character */
(*lineptr)[len-1] = '\0';
/* Return the length of the new buffer */
return len;
}