1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25 #include "curl_setup.h"
26
27 #if !defined(CURL_DISABLE_COOKIES) || !defined(CURL_DISABLE_ALTSVC) || \
28 !defined(CURL_DISABLE_HSTS) || !defined(CURL_DISABLE_NETRC)
29
30 #include "curl_get_line.h"
31 #include "curl_memory.h"
32 /* The last #include file should be: */
33 #include "memdebug.h"
34
35 /*
36 * Curl_get_line() makes sure to only return complete whole lines that fit in
37 * 'len' bytes and end with a newline.
38 */
Curl_get_line(char *buf, int len, FILE *input)39 char *Curl_get_line(char *buf, int len, FILE *input)
40 {
41 bool partial = FALSE;
42 while(1) {
43 char *b = fgets(buf, len, input);
44
45 if(b) {
46 size_t rlen = strlen(b);
47
48 if(!rlen)
49 break;
50
51 if(b[rlen-1] == '\n') {
52 /* b is \n terminated */
53 if(partial) {
54 partial = FALSE;
55 continue;
56 }
57 return b;
58 }
59 else if(feof(input)) {
60 if(partial)
61 /* Line is already too large to return, ignore rest */
62 break;
63
64 if(rlen + 1 < (size_t) len) {
65 /* b is EOF terminated, insert missing \n */
66 b[rlen] = '\n';
67 b[rlen + 1] = '\0';
68 return b;
69 }
70 else
71 /* Maximum buffersize reached + EOF
72 * This line is impossible to add a \n to so we'll ignore it
73 */
74 break;
75 }
76 else
77 /* Maximum buffersize reached */
78 partial = TRUE;
79 }
80 else
81 break;
82 }
83 return NULL;
84 }
85
86 #endif /* if not disabled */
87