QuakeC Bytecode Format

• u32, version number, 6
• u16, CRC sum
• u16, skip, 0
• u32 + u32, offset & size of the statement section
• u32 + u32, offset & size of the definition section
• u32 + u32, offset & size of the field section
• u32 + u32, offset & size of the function section
• u32 + u32, offset & size of the string section
• u32 + u32, offset & size of the globals section

Bytecode instructions.

16 bytes per statement.

• u32, Opcode
• u32, argument 1
• u32, argument 2
• u32, argument 3

Used to assign types and names to globals.

8 bytes per definition:

• u16, type
• u16, global index
• u32, name, index in the string table

Types:

0

void

1

string

2

float

3

vector

4

entity

5

field

6

function

In the type, the 15th bit is used mark it as global.

8 bytes per field:

• u16, type
• u16, offset
• u32, name, index in the string table

36 bytes per function:

• int32, entry point if positive, index the first instruction if negative, index of a builtin
• uint32, first local
• uint32, number of locals
• uint32, profile, always zero
• uint32, name, index in the string table
• uint32, file, index in the string table
• int32, number of arguments
• 8 x uint8, size of arguments

A sequence of NULL-terminated strings, usually starts with 0x00 so there is an empty string at index 0x00 .

Assigning initial values to globals. u32 for each global.