EmitConv_I4() private method

private EmitConv_I4 ( ) : void
return void
Esempio n. 1
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		/// <summary>
		/// Emits gets <see cref="Unpacker.ItemsCount"/> with exception handling.
		/// Note that final state is the value is pushed top of the evaluation stack.
		/// </summary>
		/// <param name="il">IL generator.</param>
		/// <param name="unpackerArgumentIndex">Argument index of the unpacker.</param>
		/// <param name="localHolder">The <see cref="LocalVariableHolder"/> which holds shared local variable information.</param>
		public static void EmitGetUnpackerItemsCountAsInt32( TracingILGenerator il, int unpackerArgumentIndex, LocalVariableHolder localHolder )
		{
			Contract.Requires( il != null );
			Contract.Requires( unpackerArgumentIndex >= 0 );

			/*
			 *	long rawItemsCount;
			 *	try
			 *	{
			 *		rawItemsCount = unpacker.ItemsCount;
			 *	}
			 *	catch ( InvalidOperationException ex )
			 *	{
			 *		throw SerializationExceptions.NewIsIncorrectStream( ex );
			 *	}
			 * 
			 *	if( rawItemsCount > Int32.MaxValue )
			 *	{
			 *		throw SerializationException.NewIsTooLargeCollection(); 
			 *	}
			 * 
			 *	... unchecked( ( int )rawItemsCount );
			 */
			il.EmitAnyLdloca( localHolder.RawItemsCount );
			il.EmitInitobj( typeof( long ) );
			il.BeginExceptionBlock();
			il.EmitAnyLdarg( unpackerArgumentIndex );
			il.EmitGetProperty( Metadata._Unpacker.ItemsCount );
			il.EmitAnyStloc( localHolder.RawItemsCount );
			il.BeginCatchBlock( typeof( InvalidOperationException ) );
			il.EmitAnyCall( SerializationExceptions.NewIsIncorrectStreamMethod );
			il.EmitThrow();
			il.EndExceptionBlock();

			il.EmitAnyLdloc( localHolder.RawItemsCount );
			il.EmitLdc_I8( Int32.MaxValue );
			var endIf = il.DefineLabel();
			il.EmitBle_S( endIf );
			il.EmitAnyCall( SerializationExceptions.NewIsTooLargeCollectionMethod );
			il.EmitThrow();
			il.MarkLabel( endIf );
			il.EmitAnyLdloc( localHolder.RawItemsCount );
			il.EmitConv_I4();
		}