XeNTaX

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#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <tchar.h>
#include <stdlib.h>
#include <stdio.h>
#include <string>

struct GELHeader
{
	int i1;
	int i2;
	int numberOfElements;
	int i4;
	int i5;
	int i6;

	void print()
	{
		//printf( "i1 = %d\n", i1 );
		//printf( "i2 = %d\n", i2 );
		printf( "numberOfElements = %d\n", numberOfElements );
		//printf( "i4 = %d\n", i4 );
		//printf( "i5 = %d\n", i5 );
		//printf( "i6 = %d\n", i6 );
		printf( "\n" );
	}
};

struct GELEntry
{
	int i1;
	int i2;
	char filename[128];
	int i3;
	int startOffset;
	int dataSize;
	int i6;

	void print()
	{
		//printf( "i1 = %d\n", i1 );
		//printf( "i2 = %d\n", i2 );
		printf( "filename = %s\n", filename );
		//printf( "i3 = %d\n", i3 );
		printf( "startOffset = %d\n", startOffset );
		printf( "dataSize = %d\n", dataSize );
		//printf( "i6 = %d\n", i6 );
		printf( "\n" );
	}
};

// Set this to the .GEL file that you want to extract
std::string srcGel = "C:\\Rohan\\res\\model\\Building\\skeleton.gel";
// Set this to the .GEM file that matches the .GEL file you want to extract
std::string srcGem = "C:\\Rohan\\res\\model\\Building\\skeleton.gem";
// This is the path where all the files will be extracted to
std::string destPath = "C:\\RohanData\\model\\Building";

int main()
{
	FILE* gelFP = 0;
	fopen_s( &gelFP, srcGel.c_str(), "rb" );

	if( gelFP )
	{
		FILE* gemFP = 0;
		fopen_s( &gemFP, srcGem.c_str(), "rb" );

		if( gemFP )
		{
			GELHeader gelHeader;
			fread( &gelHeader, sizeof( GELHeader ), 1, gelFP );
			//gelHeader.print();

			for( int i=0; i<gelHeader.numberOfElements; i++ )
			{
				GELEntry gelEntry;
				fread( &gelEntry, sizeof( GELEntry ), 1, gelFP );
				//gelEntry.print();
				printf( "\b\b\b\b\b\b\b%d", i + 1 );

				if( gelEntry.dataSize > 0 )
				{
					// Create the file
					std::string sFilename = gelEntry.filename;
					size_t pos = sFilename.find_last_of( "\\" );

					std::string path = sFilename.substr( 0, pos + 1 );
					std::string filename = sFilename.substr( pos + 1, sFilename.length() - pos );
					//printf( "Path = %s\nFile = %s\n", path.c_str(), filename.c_str() );

					std::string newPath = destPath;
					newPath.append( path );
					CreateDirectory( newPath.c_str(), NULL );

					// Detect GTX files (DDS files with the header changed and the extension changed
					pos = filename.find_last_of( "." );
					//printf( "pos = %d\n", pos );
					std::string ext = filename.substr( pos + 1, filename.length() - pos - 1 );
					//printf( "ext = %s\n", ext.c_str() );

					if( ext.find( "gtx" ) != std::string::npos )
					{
						//printf( "Found GTX file!\n" );
						char* data = (char*)malloc( gelEntry.dataSize );
						fseek( gemFP, gelEntry.startOffset, 0 );
						fread( data, gelEntry.dataSize, 1, gemFP );

						if( data[0] == 'G' && data[1] == 'E' && data[2] == 'O' )
						{
							// Most gtx files are DDS files with the "Magic Word" changed to GEO.  We change that here, before
							// writing the file
							filename.replace( pos + 1, 3, "dds" );
							std::string fullPath = newPath;
							fullPath.append( "\\" );
							fullPath.append( filename );

							data[0] = 'D';
							data[1] = 'D';
							data[2] = 'S';
							FILE* outFP = 0;
							fopen_s( &outFP, fullPath.c_str(), "wb" );
							if( outFP )
							{
								fwrite( data, gelEntry.dataSize, 1, outFP );
								fclose( outFP );
							}
						}
						else if( data[0] == 'D' && data[1] == 'D' && data[2] == 'S' )
						{
							// Sometimes, DDS files have the proper header in them
							filename.replace( pos + 1, 3, "dds" );
							std::string fullPath = newPath;
							fullPath.append( "\\" );
							fullPath.append( filename );

							FILE* outFP = 0;
							fopen_s( &outFP, fullPath.c_str(), "wb" );
							if( outFP )
							{
								fwrite( data, gelEntry.dataSize, 1, outFP );
								fclose( outFP );
							}
						}
						else
						{
							// Haven't come across this yet, but just in case, we'll know.
							printf( "\n" );
							printf( "Encountered UNKNOWN GTX file!\n" );
							printf( "%c %c %c\n", data[0], data[1], data[2] );
							printf( "\n" );
						}

						free( data );
					}
					else
					{
						std::string fullPath = newPath;
						fullPath.append( "\\" );
						fullPath.append( filename );
					
						FILE* outFP = 0;
						fopen_s( &outFP, fullPath.c_str(), "wb" );
						if( outFP )
						{
							void* data = malloc( gelEntry.dataSize );
							fseek( gemFP, gelEntry.startOffset, 0 );
							fread( data, gelEntry.dataSize, 1, gemFP );
							fwrite( data, gelEntry.dataSize, 1, outFP );
							free( data );
							fclose( outFP );
						}
					}
				}
			}

			printf( "\n\n" );
			fclose( gemFP );
		}

		fclose( gelFP );
	}

	return 0;
}

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/* ROHAN ONLINE .IEF FORMAT
 * BY PRINCEWADII
 * 01/27/08 4:50 AM
 * Description: .ief files group all meshes that 
 * belong together and store their .gmf file names
 * and material names.
 */

//=============
//   HEADER
//=============
dword header		//always 0x00 00 00 00
dword typeCount  	

//============
//    DATA
//============

struct Type[typeCount]   //normal armor, event armor, head deco, etc..
{
	dword typeID     	
	dword setCount 		 

	struct Set[setCount]  //combination of parts that form a full armor for example
	{
		dword setID 
		struct Part[4]
		/*Parts always come in sets of 4 (ex: upper body, 
		lower body, glove, boot)*/
		{
			dword partLen  		
			char[partLen] bodyPart   //Example: Upper Body
			dword meshCount		//Number of meshes per part

			struct Mesh [meshCount]
			{
				dword meshLen		
				char[meshLen] meshName	//example: c_am_body01.gmf 
				dword matCount		//Number of materials per mesh
				struct Materials [matCount]
				{
					dword matLen		
					char[matLen] material	//Example: Material #01001 
				}
			}
		}
	}
}