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77 lines
3.7 KiB
C
77 lines
3.7 KiB
C
/*****************************************************************************/
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/* */
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/* fileid.c */
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/* */
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/* Determine the id of a file type by extension */
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/* */
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/* */
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/* */
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/* (C) 2003-2012, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include <stdlib.h>
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#include <string.h>
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/* common */
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#include "fileid.h"
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#include "fname.h"
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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int CompareFileId (const void* Key, const void* Id)
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/* Compare function used when calling bsearch with a table of FileIds */
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{
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return strcmp (Key, ((const FileId*) Id)->Ext);
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}
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const FileId* GetFileId (const char* Name, const FileId* Table, unsigned Count)
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/* Determine the id of the given file by looking at file extension of the name.
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** The table passed to the function must be sorted alphabetically. If the
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** extension is found, a pointer to the matching table entry is returned. If
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** no matching table entry was found, the function returns NULL.
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*/
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{
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/* Determine the file type by the extension */
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const char* Ext = FindExt (Name);
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/* Do we have an extension? */
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if (Ext == 0) {
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return 0;
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}
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/* Search for a table entry and return it */
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return bsearch (Ext+1, Table, Count, sizeof (FileId), CompareFileId);
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}
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