#include "StdAfx.h"
#include "DiffEngine.h"
#include "diff.h"
//#include "filesys.h"
 
p4dn::DiffEngine::DiffEngine()
{
	_encoding = System::Text::Encoding::GetEncoding(1252);
}
 
 
array<System::String^>^ p4dn::DiffEngine::RunDiff (IO::FileInfo^ f1, IO::FileInfo^ f2)
{
	List<String^> output = gcnew List<String^>();
	::Error* e = new ::Error();
    //
    // Duck binary files. Much the same as ClientUser::Diff, we just
    // put the output into Ruby space rather than stdout.
    //
  //  if( !f1->IsTextual() || !f2->IsTextual() )
  //  {
		//if ( f1->Compare( f2, e ) )
		//{
		//	output.Add("(... files differ ...)");
		//	//OutputInfo( 0, "(... files differ ...)" );
		//}
		//return;
  //  }
 
    // Time to diff the two text files. Need to ensure that the
    // files are in binary mode, so we have to create new FileSys
    // objects to do this.
 
	::FileSys *f1_bin = FileSys::Create( ::FST_BINARY );
	::FileSys *f2_bin = FileSys::Create( ::FST_BINARY );
	StrBuf f1_name, f2_name;
	P4String::StringToStrBuf(&f1_name, f1->FullName, _encoding);
	P4String::StringToStrBuf(&f2_name, f2->FullName, _encoding);
	f1_bin->Set(f1_name);
    f2_bin->Set(f2_name);
 
	::FileSys *t = FileSys::CreateGlobalTemp(::FST_TEXT );
 
	StrBuf flags;
	P4String::StringToStrBuf(&flags, _flags, _encoding);
 
 
    {
		//
		// In its own block to make sure that the diff object is deleted
		// before we delete the FileSys objects.
		//
		::Diff d;
		::DiffFlags diffFlags(&flags);
 
		d.SetInput( f1_bin, f2_bin, diffFlags, e );
		if ( ! e->Test() ) d.SetOutput( t->Name(), e );
		if ( ! e->Test() ) d.DiffWithFlags( diffFlags );
		d.CloseOutput( e );
 
		// OK, now we have the diff output, read it in and add it to 
		// the output.
		if ( ! e->Test() ) t->Open( FOM_READ, e );
		if ( ! e->Test() ) 
		{
			StrBuf 	b;
			//while( t->ReadLine( &b, e ) )
			//OutputInfo(0, b.Text() );
		}
    }
	
    delete t;
    delete f1_bin;
    delete f2_bin;
	delete e;
    //if ( e->Test() ) HandleError( e );
 
 
	return output.ToArray();
}