1 | /*****************************************************************************/ |
2 | /* */ |
3 | /* fileid.c */ |
4 | /* */ |
5 | /* Determine the id of a file type by extension */ |
6 | /* */ |
7 | /* */ |
8 | /* */ |
9 | /* (C) 2003-2012, Ullrich von Bassewitz */ |
10 | /* Roemerstrasse 52 */ |
11 | /* D-70794 Filderstadt */ |
12 | /* EMail: uz@cc65.org */ |
13 | /* */ |
14 | /* */ |
15 | /* This software is provided 'as-is', without any expressed or implied */ |
16 | /* warranty. In no event will the authors be held liable for any damages */ |
17 | /* arising from the use of this software. */ |
18 | /* */ |
19 | /* Permission is granted to anyone to use this software for any purpose, */ |
20 | /* including commercial applications, and to alter it and redistribute it */ |
21 | /* freely, subject to the following restrictions: */ |
22 | /* */ |
23 | /* 1. The origin of this software must not be misrepresented; you must not */ |
24 | /* claim that you wrote the original software. If you use this software */ |
25 | /* in a product, an acknowledgment in the product documentation would be */ |
26 | /* appreciated but is not required. */ |
27 | /* 2. Altered source versions must be plainly marked as such, and must not */ |
28 | /* be misrepresented as being the original software. */ |
29 | /* 3. This notice may not be removed or altered from any source */ |
30 | /* distribution. */ |
31 | /* */ |
32 | /*****************************************************************************/ |
33 | |
34 | |
35 | |
36 | #include <stdlib.h> |
37 | #include <string.h> |
38 | |
39 | /* common */ |
40 | #include "fileid.h" |
41 | #include "fname.h" |
42 | |
43 | |
44 | |
45 | /*****************************************************************************/ |
46 | /* Code */ |
47 | /*****************************************************************************/ |
48 | |
49 | |
50 | |
51 | int CompareFileId (const void* Key, const void* Id) |
52 | /* Compare function used when calling bsearch with a table of FileIds */ |
53 | { |
54 | return strcmp (Key, ((const FileId*) Id)->Ext); |
55 | } |
56 | |
57 | |
58 | |
59 | const FileId* GetFileId (const char* Name, const FileId* Table, unsigned Count) |
60 | /* Determine the id of the given file by looking at file extension of the name. |
61 | ** The table passed to the function must be sorted alphabetically. If the |
62 | ** extension is found, a pointer to the matching table entry is returned. If |
63 | ** no matching table entry was found, the function returns NULL. |
64 | */ |
65 | { |
66 | /* Determine the file type by the extension */ |
67 | const char* Ext = FindExt (Name); |
68 | |
69 | /* Do we have an extension? */ |
70 | if (Ext == 0) { |
71 | return 0; |
72 | } |
73 | |
74 | /* Search for a table entry and return it */ |
75 | return bsearch (Ext+1, Table, Count, sizeof (FileId), CompareFileId); |
76 | } |
77 | |