tagEditor, sample program utilize TagLib

In a recent post, I'v talked about TagLib.

And Now here's a full functional program:

	/*
	This SOURCE CODE is provided AS IS with NO WARRANTY OF ANY KIND, so always take a backup of your files first
	@auther Mohammed Hewedy
	*/
	#include <iostream>
	#include <cstring>
	#include <taglib/fileref.h>
	#include <taglib/tag.h>
	#include <dirent.h>
	using namespace std;
	using namespace TagLib;
	void modifyID3Data(char*, char*, char*);
	void usage();
	char* extractSongName(char* songName, char* fileName);
	char* obtainFullPath(char* fullPath, char* dirName, char* FileName);
	int main(int argc, char** argv)
	{
	if (argc != 3)
	usage();
	char* dirName = argv[1];
	DIR* d = opendir(dirName);
	char* artist = argv[2];
	if (d)
	{
	dirent* dn;
	while ( dn = readdir(d))
	{
	if (dn->d_type == DT_REG)
	{
	char* fileName = dn->d_name;
	char fullPath[strlen(dirName) + strlen(fileName) + 1];
	obtainFullPath(fullPath, dirName, fileName);
	char songName[strlen(fileName)-3];
	extractSongName(songName, fileName);
	modifyID3Data(fullPath, artist, songName);
	cout <<"Updating " << fileName <<endl;
	}
	}
	closedir(d);
	}
	return 0;
	}
	char* obtainFullPath(char* fullPath, char* dirName, char* fileName)
	{
	strcpy(fullPath, dirName);
	strcpy(&fullPath[strlen(dirName)], fileName);
	}
	char* extractSongName(char* songName, char* fileName)
	{
	int l = strlen(fileName);
	strncpy(songName, fileName, l-4);
	songName[l-4] = '\0';
	return songName;
	}
	void modifyID3Data(char* fullFilePath, char* artist, char* songName)
	{
	FileRef f(fullFilePath);
	cout << f.tag()->artist() << endl;
	f.tag()->setArtist(artist);
	f.tag()->setTitle(songName);
	f.save();
	}
	void usage()
	{
	char* appName = "tagEditor";
	char* desc = "updates a bulk of Dir of MP3 Files (and other formats, see http://developer.kde.org/~wheeler/taglib.html) "
	"sets the Artist with <artist> and set the song title by its file name execluding the four character extentions";
	char* disc = "This Program is provided AS IS with NO WARRANTY OF ANY KIND, so always take a backup of your files first.";
	cout << "Usage: " << appName << " <dir> <artist>" <<endl << desc << endl << endl << disc << endl;
	exit(1);
	}

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