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
51int 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
59const 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