MinecraftConsoles/Minecraft.World/DataOutputStream.cpp

#include "stdafx.h"
#include "BasicTypeContainers.h"

#include "DataOutputStream.h"

//Creates a new data output stream to write data to the specified underlying output stream. The counter written is set to zero.
//Parameters:
//out - the underlying output stream, to be saved for later use.
DataOutputStream::DataOutputStream( OutputStream *out ) : stream( out ), written( 0 )
{
}

// 4J Stu - We cannot always delete the stream when we are destroyed, but we want to clear it up as there
// are occasions when we don't have a handle to the child stream elsewhere and want to delete it
void DataOutputStream::deleteChildStream()
{
	delete stream;
}

//Writes the specified byte (the low eight bits of the argument b) to the underlying output stream.
//If no exception is thrown, the counter written is incremented by 1.
//Implements the write method of OutputStream.
//Parameters:
//b - the byte to be written.
void DataOutputStream::write(unsigned int b)
{
	stream->write( b );
	// TODO 4J Stu - Exception handling?
	written++;
}

void DataOutputStream::flush()
{
	stream->flush();
}

//Writes b.length bytes from the specified byte array to this output stream.
//The general contract for write(b) is that it should have exactly the same effect as the call write(b, 0, b.length).
//Parameters:
//b - the data.
void DataOutputStream::write(byteArray b)
{
	write(b, 0, b.length);
}

//Writes len bytes from the specified byte array starting at offset off to the underlying output stream.
//If no exception is thrown, the counter written is incremented by len.
//Parameters:
//b - the data.
//off - the start offset in the data.
//len - the number of bytes to write.
void DataOutputStream::write(byteArray b, unsigned int offset, unsigned int length)
{
	stream->write(b, offset, length);
	// TODO 4J Stu - Some form of error checking?
	written += length;
}

//Closes this output stream and releases any system resources associated with the stream.
//The close method of FilterOutputStream calls its flush method, and then calls the close method of its underlying output stream.
void DataOutputStream::close()
{
	stream->close();
}

//Writes out a byte to the underlying output stream as a 1-byte value. If no exception is thrown, the counter written is incremented by 1.
//Parameters:
//v - a byte value to be written.
void DataOutputStream::writeByte(byte a)
{
	stream->write( a );
}

//Converts the double argument to a long using the doubleToLongBits method in class Double,
//and then writes that long value to the underlying output stream as an 8-byte quantity,
//high byte first. If no exception is thrown, the counter written is incremented by 8.
//Parameters:
//v - a double value to be written.
void DataOutputStream::writeDouble(double a)
{
	int64_t bits = Double::doubleToLongBits( a );

	writeLong( bits );
	// TODO 4J Stu - Error handling?
	written += 8;
}

//Converts the float argument to an int using the floatToIntBits method in class Float,
//and then writes that int value to the underlying output stream as a 4-byte quantity, high byte first.
//If no exception is thrown, the counter written is incremented by 4.
//Parameters:
//v - a float value to be written.
void DataOutputStream::writeFloat(float a)
{
	int bits = Float::floatToIntBits( a );

	writeInt( bits );
	// TODO 4J Stu - Error handling?
	written += 4;
}

//Writes an int to the underlying output stream as four bytes, high byte first. If no exception is thrown, the counter written is incremented by 4.
//Parameters:
//v - an int to be written.
void DataOutputStream::writeInt(int a)
{
	stream->write( (a >> 24) & 0xff );
	stream->write( (a >> 16) & 0xff );
	stream->write( (a >> 8) & 0xff );
	stream->write( a & 0xff );
	// TODO 4J Stu - Error handling?
	written += 4;
}

//Writes a long to the underlying output stream as eight bytes, high byte first.
//In no exception is thrown, the counter written is incremented by 8.
//Parameters:
//v - a long to be written.
void DataOutputStream::writeLong(int64_t a)
{
	stream->write( (a >> 56) & 0xff );
	stream->write( (a >> 48) & 0xff );
	stream->write( (a >> 40) & 0xff );
	stream->write( (a >> 32) & 0xff );
	stream->write( (a >> 24) & 0xff );
	stream->write( (a >> 16) & 0xff );
	stream->write( (a >> 8) & 0xff );
	stream->write( a & 0xff );
	// TODO 4J Stu - Error handling?
	written += 4;
}

//Writes a short to the underlying output stream as two bytes, high byte first.
//If no exception is thrown, the counter written is incremented by 2.
//Parameters:
//v - a short to be written.
void DataOutputStream::writeShort(short a)
{
	stream->write( (a >> 8) & 0xff );
	stream->write( a & 0xff );
	// TODO 4J Stu - Error handling?
	written += 2;
}

void DataOutputStream::writeUnsignedShort(unsigned short a)
{
	stream->write( (a >> 8) & 0xff );
	stream->write( a & 0xff );
	// TODO 4J Stu - Error handling?
	written += 2;
}

//Writes a char to the underlying output stream as a 2-byte value, high byte first.
//If no exception is thrown, the counter written is incremented by 2.
//Parameters:
//v - a char value to be written.
void DataOutputStream::writeChar( wchar_t v )
{
	stream->write( (v >> 8) & 0xff );
	stream->write( v & 0xff );
	// TODO 4J Stu - Error handling?
	written += 2;
}

//Writes a string to the underlying output stream as a sequence of characters.
//Each character is written to the data output stream as if by the writeChar method.
//If no exception is thrown, the counter written is incremented by twice the length of s.
//Parameters:
//s - a String value to be written.
void DataOutputStream::writeChars(const wstring& str)
{
	for( unsigned int i = 0; i < str.length(); i++)
	{
		writeChar( str.at( i ) );
		// TODO 4J Stu - Error handling?
	}
	// Incrementing handled by the writeChar function
}

//Writes a boolean to the underlying output stream as a 1-byte value.
//The value true is written out as the value (byte)1; the value false is written out as the value (byte)0.
//If no exception is thrown, the counter written is incremented by 1.
//Parameters:
//v - a boolean value to be written.
void DataOutputStream::writeBoolean(bool b)
{
	stream->write( b ? (byte)1 : (byte)0 );
	// TODO 4J Stu - Error handling?
	written += 1;
}

//Writes a string to the underlying output stream using modified UTF-8 encoding in a machine-independent manner.
//First, two bytes are written to the output stream as if by the writeShort method giving the number of bytes to follow.
//This value is the number of bytes actually written out, not the length of the string. Following the length,
//each character of the string is output, in sequence, using the modified UTF-8 encoding for the character.
//If no exception is thrown, the counter written is incremented by the total number of bytes written to the output stream.
//This will be at least two plus the length of str, and at most two plus thrice the length of str.
//Parameters:
//str - a string to be written.
void DataOutputStream::writeUTF(const wstring& str)
{
	int strlen = (int)str.length();
	int utflen = 0;
	int c, count = 0;

	/* use charAt instead of copying String to char array */
	for (int i = 0; i < strlen; i++)
	{
		c = str.at(i);
		if ((c >= 0x0001) && (c <= 0x007F))
		{
			utflen++;
		}
		else if (c > 0x07FF)
		{
			utflen += 3;
		}
		else
		{
			utflen += 2;
		}
	}

	//if (utflen > 65535)
	//	throw new UTFDataFormatException(
	//	"encoded string too long: " + utflen + " bytes");

	byteArray bytearr(utflen+2);

	bytearr[count++] = (byte) ((utflen >> 8) & 0xFF);
	bytearr[count++] = (byte) ((utflen >> 0) & 0xFF);

	int i=0;
	for (i=0; i<strlen; i++)
	{
		c = str.at(i);
		if (!((c >= 0x0001) && (c <= 0x007F))) break;
		bytearr[count++] = (byte) c;
	}

	for (;i < strlen; i++)
	{
		c = str.at(i);
		if ((c >= 0x0001) && (c <= 0x007F))
		{
			bytearr[count++] = (byte) c;

		}
		else if (c > 0x07FF)
		{
			bytearr[count++] = (byte) (0xE0 | ((c >> 12) & 0x0F));
			bytearr[count++] = (byte) (0x80 | ((c >>  6) & 0x3F));
			bytearr[count++] = (byte) (0x80 | ((c >>  0) & 0x3F));
		}
		else
		{
			bytearr[count++] = (byte) (0xC0 | ((c >>  6) & 0x1F));
			bytearr[count++] = (byte) (0x80 | ((c >>  0) & 0x3F));
		}
	}
	write(bytearr, 0, utflen+2);
	delete[] bytearr.data;
}

// 4J Added
void DataOutputStream::writePlayerUID(PlayerUID player)
{
#if defined(__PS3__) || defined(__ORBIS__) || defined (__PSVITA__)
	for(int idPos=0;idPos<sizeof(PlayerUID); idPos++)
		writeByte(((char*)&player)[idPos]);
#elif defined(_DURANGO)
	writeUTF(player.toString());
#else
	writeLong(player);
#endif // PS3
}