1 /*-
2  * Copyright (c) 2003-2012 Tim Kientzle
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24  */
25 
26 #include "archive_platform.h"
27 
28 #ifdef HAVE_ERRNO_H
29 #include <errno.h>
30 #endif
31 
32 #include "archive.h"
33 #include "archive_private.h"
34 #include "archive_read_private.h"
35 
36 int
37 archive_read_set_format(struct archive *_a, int code)
38 {
39   int r1, r2, slots, i;
40   char str[10];
41   struct archive_read *a = (struct archive_read *)_a;
42 
43   if ((r1 = archive_read_support_format_by_code(_a, code)) < (ARCHIVE_OK))
44     return r1;
45 
46   r1 = r2 = (ARCHIVE_OK);
47   if (a->format)
48     r2 = (ARCHIVE_WARN);
49   switch (code & ARCHIVE_FORMAT_BASE_MASK)
50   {
51     case ARCHIVE_FORMAT_7ZIP:
52       strcpy(str, "7zip");
53       break;
54     case ARCHIVE_FORMAT_AR:
55       strcpy(str, "ar");
56       break;
57     case ARCHIVE_FORMAT_CAB:
58       strcpy(str, "cab");
59       break;
60     case ARCHIVE_FORMAT_CPIO:
61       strcpy(str, "cpio");
62       break;
63     case ARCHIVE_FORMAT_EMPTY:
64       strcpy(str, "empty");
65       break;
66     case ARCHIVE_FORMAT_ISO9660:
67       strcpy(str, "iso9660");
68       break;
69     case ARCHIVE_FORMAT_LHA:
70       strcpy(str, "lha");
71       break;
72     case ARCHIVE_FORMAT_MTREE:
73       strcpy(str, "mtree");
74       break;
75     case ARCHIVE_FORMAT_RAR:
76       strcpy(str, "rar");
77       break;
78     case ARCHIVE_FORMAT_RAR_V5:
79       strcpy(str, "rar5");
80       break;
81     case ARCHIVE_FORMAT_RAW:
82       strcpy(str, "raw");
83       break;
84     case ARCHIVE_FORMAT_TAR:
85       strcpy(str, "tar");
86       break;
87     case ARCHIVE_FORMAT_WARC:
88       strcpy(str, "warc");
89       break;
90     case ARCHIVE_FORMAT_XAR:
91       strcpy(str, "xar");
92       break;
93     case ARCHIVE_FORMAT_ZIP:
94       strcpy(str, "zip");
95       break;
96     default:
97       archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER,
98           "Invalid format code specified");
99       return (ARCHIVE_FATAL);
100   }
101 
102   slots = sizeof(a->formats) / sizeof(a->formats[0]);
103   a->format = &(a->formats[0]);
104   for (i = 0; i < slots; i++, a->format++) {
105     if (!a->format->name || !strcmp(a->format->name, str))
106       break;
107   }
108   if (!a->format->name || strcmp(a->format->name, str))
109   {
110     archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER,
111         "Internal error: Unable to set format");
112     r1 = (ARCHIVE_FATAL);
113   }
114 
115   return (r1 < r2) ? r1 : r2;
116 }
117