GameScriptingMastery

使用C#实现 <GameScriptingMastery>(游戏脚本高级编程) 书中的XtremeScript Assembler

Instruction

• Mov
• Add, Sub, Mul, Div
• Jmp, JE, JNE, JG, JL, JGE, JLE
• Call, Ret

XtremeScript Assembly Language Grammar

Declare local variable

var Sum

Define script entry function

func main {
var Num
Mov Num, 1
LoopBody: # Implement a loop
Add Num, 1
JL Num, 3, LoopBody
}

Define a function

func MyFunction {
param X # Declare some parameters
param Y
var Sum
Mov Sum, X
Add Sum, Y
Mov _ret_val, Sum # Save the result to the stack's registers
}

Call a function

func Function_1 {
}
func main {
Call Function_1
}

Usage

Code for execute 'xasm' script:

varparser=newXASMParser(File.ReadAllText("main.xasm"));varvm=newXVM();vm.script=parser.Compile();vm.Run();

Note

• Jump Label can only be defined in function
• Defining functions within functions is not supported
• English is not my native language, please understand