Data Types

Introduction

RuneScape uses a number of standard and non-standard data types.

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Standard data types

These datatypes can also be read/written by a DataWriter/DataReader implementation (DataStreams and Buffers)

Naming conventions:

Official name	Datatype name	Jagex name	Encoding
Byte	byte	1,1b
WORD	short	2,2b
DWORD	int,int32	4,4b
QWORD	long,int64	8,8b
C style string	string,String,char *,char[]	str,strbyte	text bytes then '\n' or 10
Java style string	string,String,char *,char[]	strraw	WORD length then text bytes

Note that Jagex used to use a new line character as string terminator, in more recent versions they use the null character \0 or 0 to support multi-line strings.

Non Standard Data Types

Winterlove's name	Jagex name	Read transformation	Write transformation
Special A	Unknown	value - 128	value + 128
Special C	Unknown	0 - value	0 - value
Special S	Unknown	128 - value	128 - value
SpaceSaverA	smarts	(value[0] < 128) ? (((value[0] - 128)<<8)+value[1]) : value[0]	if(value < 128) putword(value+32768) else putbyte(value);
SpaceSaverB	smart	((value[0]<<8)+value[1]) - 49152	if(i < 64 && i >= -64) putbyte(i + 64) else if(i < 16384 && i >= -16384) putword(i + 49152);
tribyte / RGBColour / 3Byte / int3	3	(value[0] << 24) + (value[1] << 16) + value[2]	putbyte(value >> 24);putbyte(value >> 16);putbyte(value);

Additionally, RuneScape also uses two additional integers (named int 1 and int 2) with different byte orders that are not big endian or little endian.