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Add the new expression opcode.
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@Damnae
Damnae committed Oct 19, 2023
1 parent b277a21 commit 57e277a
Showing 1 changed file with 114 additions and 55 deletions.
169 changes: 114 additions & 55 deletions src/sources/gamecore.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -133,6 +133,52 @@ export function evaluateDescriptionString(description:string, params:string[]) :
return cleanupMarkup(description)
}

enum ExpressionOpCode
{
Constant,
Variable,
Add,
Subtract,
Multiply,
Divide,
Modulo,
Negative,
Not,
Call,
Return,
}

const opCodeMaps:{[version:number]:{[opCodeValue:number]:ExpressionOpCode}} =
{
9:
{
0: ExpressionOpCode.Constant,
1: ExpressionOpCode.Variable,
2: ExpressionOpCode.Add,
3: ExpressionOpCode.Subtract,
4: ExpressionOpCode.Multiply,
5: ExpressionOpCode.Divide,
6: ExpressionOpCode.Negative,
7: ExpressionOpCode.Not,
8: ExpressionOpCode.Call,
9: ExpressionOpCode.Return,
},
10:
{
0: ExpressionOpCode.Constant,
1: ExpressionOpCode.Variable,
2: ExpressionOpCode.Add,
3: ExpressionOpCode.Subtract,
4: ExpressionOpCode.Multiply,
5: ExpressionOpCode.Divide,
6: ExpressionOpCode.Modulo,
7: ExpressionOpCode.Negative,
8: ExpressionOpCode.Not,
9: ExpressionOpCode.Call,
10: ExpressionOpCode.Return,
},
}

export function evaluateDynamicExpression(expression?:DynamicExpression, context?:ExpressionContext) : string
{
if (!expression)
Expand All @@ -143,26 +189,36 @@ export function evaluateDynamicExpression(expression?:DynamicExpression, context

if (expression.PostfixExpr)
{
const postFixExpr = expression.PostfixExpr;
const opCodes = postFixExpr.OpCodes;
const constants = postFixExpr.FixedValues;
const variables = postFixExpr.DynamicHashes;

const stack:string[] = [];
let formula = undefined;
const postFixExpr = expression.PostfixExpr
const opCodes = postFixExpr.OpCodes
const constants = postFixExpr.FixedValues
const variables = postFixExpr.DynamicHashes

const stack:string[] = []
const hashStore = useHashStore()

var bytes = atob(opCodes);
var bytes = atob(opCodes)
const version = bytes.charCodeAt(bytes.length - 1)
const opCodeMap = opCodeMaps[version]

if (opCodeMap == undefined)
{
console.log('expression last opcode: ' + version)
return 'NYI'
}

let formula = ''
for (var i = 0; i < bytes.length; i++)
{
var opCode = bytes.charCodeAt(i);
const opCodeValue = bytes.charCodeAt(i)
const opCode = opCodeMap[opCodeValue]

switch (opCode)
{
case 0: // Constant
stack.push(cleanupNumber(constants?.[bytes.charCodeAt(++i)]?.Value));
break;
case 1: // Variable
case ExpressionOpCode.Constant:
stack.push(cleanupNumber(constants?.[bytes.charCodeAt(++i)]?.Value))
break
case ExpressionOpCode.Variable:
const hash = variables?.[bytes.charCodeAt(++i)]
let variable = hashStore.translate(hash) ?? `Var[${hash}]`
if (context)
Expand All @@ -178,52 +234,55 @@ export function evaluateDynamicExpression(expression?:DynamicExpression, context
}
}
stack.push(variable);
break;
case 2: // Add
var right = stack.pop();
var left = stack.pop();
stack.push(`(${left}) + (${right})`);
break;
case 3: // Subtract
var right = stack.pop();
var left = stack.pop();
stack.push(`(${left}) - (${right})`);
break;
case 4: // Multiply
var right = stack.pop();
var left = stack.pop();
stack.push(`(${left}) * (${right})`);
break;
case 5: // Divide
var right = stack.pop();
var left = stack.pop();
stack.push(`(${left}) / (${right})`);
break;
case 6: // Negative
var right = stack.pop();
stack.push(`-(${right})`);
break;
case 7: // Not
var right = stack.pop();
stack.push(`!(${right})`);
break;
case 8: // Call
var right = stack.pop();
var left = stack.pop();
stack.push(`${left}(${right}, ${bytes.charCodeAt(++i)})`);
break;
case 9: // Return
case 10: // Return?
var result = stack.pop();
formula = result ?? 'empty';
break;
break
case ExpressionOpCode.Add:
var right = stack.pop()
var left = stack.pop()
stack.push(`(${left}) + (${right})`)
break
case ExpressionOpCode.Subtract:
var right = stack.pop()
var left = stack.pop()
stack.push(`(${left}) - (${right})`)
break
case ExpressionOpCode.Multiply:
var right = stack.pop()
var left = stack.pop()
stack.push(`(${left}) * (${right})`)
break
case ExpressionOpCode.Divide:
var right = stack.pop()
var left = stack.pop()
stack.push(`(${left}) / (${right})`)
break
case ExpressionOpCode.Modulo:
var right = stack.pop()
var left = stack.pop()
stack.push(`(${left}) % (${right})`)
break
case ExpressionOpCode.Negative:
var right = stack.pop()
stack.push(`-(${right})`)
break
case ExpressionOpCode.Not:
var right = stack.pop()
stack.push(`!(${right})`)
break
case ExpressionOpCode.Call:
var right = stack.pop()
var left = stack.pop()
stack.push(`${left}(${right}, ${bytes.charCodeAt(++i)})`)
break
case ExpressionOpCode.Return:
var result = stack.pop()
formula = result ?? 'empty'
break
default:
console.log('expression opcode not implemented: ' + opCode);
console.log('expression opcode not implemented: ' + opCode)
}
}

formula = formula ?? stack.pop() ?? 'empty';
return formula;
return formula
}

return 'unknown'
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