#include "PrefsFile.h"

#ifdef __cplusplus
extern "C" {
#endif
OSType gPrefsCreator = '????';
#ifdef __cplusplus
}
#endif

FSSpec PrefsFileSpec( Str255 fileName )
{
	short foundVRefNum;
	long foundDirID;
	FSSpec out;
	OSErr err;
	
	// find the Preferences folder
	err = FindFolder(	kOnSystemDisk,
						kPreferencesFolderType,
						kCreateFolder,
						&foundVRefNum,&foundDirID);
	if (!err)
		// make it into a FSSpec (given the file name)
		FSMakeFSSpec(foundVRefNum, foundDirID, fileName, &out);
	return out;
}

OSErr WritePrefsFile( FSSpec fileSpec, Ptr buffer, long bufferLen ) {
	short fileRefNum;
	OSErr err;
	
	// create our prefs file
	err = FSpCreate( &fileSpec, gPrefsCreator, 'pref', smSystemScript );
	if (err && err != -48) return err;

	// open it for writing
	err = FSpOpenDF( &fileSpec, fsWrPerm, &fileRefNum);
	if (err) return err;

	// write the data
	err = FSWrite( fileRefNum, &bufferLen, buffer );
	FSClose( fileRefNum );

	return err;
}

OSErr ReadPrefsFile( FSSpec fileSpec, Ptr buffer, long bufferLen ) {
	short fileRefNum;
	OSErr err;
	
	// open prefs file for reading
	err = FSpOpenDF( &fileSpec, fsCurPerm, &fileRefNum);
	if (err) return err;

	// read the data
	err = FSRead( fileRefNum, &bufferLen, buffer );
	FSClose( fileRefNum );

	return err;
}