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1 office 1 /**
2 * @file write_file.h
3 * @author Ambroz Bizjak <ambrop7@gmail.com>
4 *
5 * @section LICENSE
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the author nor the
15 * names of its contributors may be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29  
30 #ifndef BADVPN_WRITE_FILE_H
31 #define BADVPN_WRITE_FILE_H
32  
33 #include <stddef.h>
34 #include <stdint.h>
35 #include <stdio.h>
36  
37 #include <misc/debug.h>
38 #include <misc/memref.h>
39  
40 static int write_file (const char *file, MemRef data)
41 {
42 FILE *f = fopen(file, "w");
43 if (!f) {
44 goto fail0;
45 }
46  
47 while (data.len > 0) {
48 size_t res = fwrite(data.ptr, 1, data.len, f);
49 if (res == 0) {
50 goto fail1;
51 }
52  
53 ASSERT(res <= data.len)
54  
55 data = MemRef_SubFrom(data, res);
56 }
57  
58 if (fclose(f) != 0) {
59 return 0;
60 }
61  
62 return 1;
63  
64 fail1:
65 fclose(f);
66 fail0:
67 return 0;
68 }
69  
70 #endif