1 /*
2 * Copyright 2012, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <stdio.h>
18
getline(char ** lineptr,size_t * n,FILE * stream)19 ssize_t getline(char **lineptr, size_t *n, FILE *stream)
20 {
21 char *ptr;
22
23 ptr = fgetln(stream, n);
24
25 if (ptr == NULL) {
26 return -1;
27 }
28
29 /* Free the original ptr */
30 if (*lineptr != NULL) free(*lineptr);
31
32 /* Add one more space for '\0' */
33 size_t len = n[0] + 1;
34
35 /* Update the length */
36 n[0] = len;
37
38 /* Allocate a new buffer */
39 *lineptr = malloc(len);
40
41 /* Copy over the string */
42 memcpy(*lineptr, ptr, len-1);
43
44 /* Write the NULL character */
45 (*lineptr)[len-1] = '\0';
46
47 /* Return the length of the new buffer */
48 return len;
49 }
50