Press n or j to go to the next uncovered block, b, p or k for the previous block.
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import { assertUnreachable } from "./format";
import tokenize from "shared/lib/rpn/tokenizer";
import shuntingYard from "shared/lib/rpn/shuntingYard";
import {
PrecompiledValueRPNOperation,
PrecompiledValueFetch,
isValueOperation,
ScriptValue,
isUnaryOperation,
ValueOperatorType,
ValueUnaryOperatorType,
isValueUnaryOperatorType,
RPNOperation,
RPNUnaryOperation,
ScriptValueAtom,
} from "./types";
import { OperatorSymbol } from "shared/lib/rpn/types";
const boolToInt = (val: boolean) => (val ? 1 : 0);
const zero = {
type: "number",
value: 0,
} as const;
export const optimiseScriptValue = (input: ScriptValue): ScriptValue => {
if (isValueOperation(input)) {
const optimisedA = input.valueA ? optimiseScriptValue(input.valueA) : zero;
const optimisedB = input.valueB ? optimiseScriptValue(input.valueB) : zero;
if (optimisedA?.type === "number" && optimisedB?.type === "number") {
// Can perform constant folding as both inputs are numbers
if (input.type === "add") {
return {
type: "number",
value: Math.floor(optimisedA.value + optimisedB.value),
};
} else if (input.type === "sub") {
return {
type: "number",
value: Math.floor(optimisedA.value - optimisedB.value),
};
} else if (input.type === "mul") {
return {
type: "number",
value: Math.floor(optimisedA.value * optimisedB.value),
};
} else if (input.type === "div") {
return {
type: "number",
value: Math.floor(optimisedA.value / optimisedB.value),
};
} else if (input.type === "mod") {
return {
type: "number",
value: Math.floor(optimisedA.value % optimisedB.value),
};
} else if (input.type === "gt") {
return {
type: "number",
value: boolToInt(optimisedA.value > optimisedB.value),
};
} else if (input.type === "gte") {
return {
type: "number",
value: boolToInt(optimisedA.value >= optimisedB.value),
};
} else if (input.type === "lt") {
return {
type: "number",
value: boolToInt(optimisedA.value < optimisedB.value),
};
} else if (input.type === "lte") {
return {
type: "number",
value: boolToInt(optimisedA.value <= optimisedB.value),
};
} else if (input.type === "eq") {
return {
type: "number",
value: boolToInt(optimisedA.value === optimisedB.value),
};
} else if (input.type === "ne") {
return {
type: "number",
value: boolToInt(optimisedA.value !== optimisedB.value),
};
} else if (input.type === "min") {
return {
type: "number",
value: Math.min(optimisedA.value, optimisedB.value),
};
} else if (input.type === "max") {
return {
type: "number",
value: Math.max(optimisedA.value, optimisedB.value),
};
} else if (input.type === "and") {
return {
type: "number",
value: optimisedA.value && optimisedB.value,
};
} else if (input.type === "or") {
return {
type: "number",
value: optimisedA.value || optimisedB.value,
};
} else if (input.type === "shl") {
return {
type: "number",
value: optimisedA.value << optimisedB.value,
};
} else if (input.type === "shr") {
return {
type: "number",
value: optimisedA.value >> optimisedB.value,
};
} else if (input.type === "bAND") {
return {
type: "number",
value: optimisedA.value & optimisedB.value,
};
} else if (input.type === "bOR") {
return {
type: "number",
value: optimisedA.value | optimisedB.value,
};
} else if (input.type === "bXOR") {
return {
type: "number",
value: optimisedA.value ^ optimisedB.value,
};
} else if (input.type === "atan2") {
return {
type: "number",
value: Math.floor(
wrap8Bit(
Math.atan2(optimisedA.value, optimisedB.value) * (128 / Math.PI) +
64
)
),
};
}
/* istanbul ignore next: unreachable */
assertUnreachable(input.type);
}
return {
...input,
valueA: optimisedA,
valueB: optimisedB,
};
}
if (isUnaryOperation(input)) {
const type = input.type;
const optimisedValue = input.value
? optimiseScriptValue(input.value)
: zero;
if (optimisedValue?.type === "number") {
if (type === "not") {
return {
type: "number",
value: boolToInt(!optimisedValue.value),
};
} else if (type === "abs") {
return {
type: "number",
value: Math.floor(Math.abs(optimisedValue.value)),
};
} else if (type === "isqrt") {
return {
type: "number",
value: Math.floor(Math.sqrt(optimisedValue.value)),
};
} else if (type === "bNOT") {
return {
type: "number",
value: ~optimisedValue.value,
};
} else if (type === "rnd") {
return {
type: "rnd",
value: {
type: "number",
value: optimisedValue.value,
},
};
}
/* istanbul ignore next: unreachable */
assertUnreachable(type);
}
return {
...input,
value: optimisedValue,
};
} else if (input.type === "expression") {
return optimiseScriptValue(expressionToScriptValue(input.value));
}
return input;
};
export const expressionToScriptValue = (expression: string): ScriptValue => {
try {
const tokens = tokenize(expression);
const rpnTokens = shuntingYard(tokens);
const stack: ScriptValue[] = [];
function mapOperator(
operator: OperatorSymbol
): ValueOperatorType | ValueUnaryOperatorType {
const operatorMap: Record<
OperatorSymbol,
ValueOperatorType | ValueUnaryOperatorType
> = {
"/": "div",
"*": "mul",
"+": "add",
"-": "sub",
"%": "mod",
"!": "not",
"&": "bAND",
"|": "bOR",
"^": "bXOR",
"~": "bNOT",
"==": "eq",
"!=": "ne",
"<": "lt",
"<=": "lte",
">": "gt",
">=": "gte",
"&&": "and",
"||": "or",
"<<": "shl",
">>": "shr",
};
const scriptValueOperator = operatorMap[operator];
/* istanbul ignore else: unreachable else branch */
if (scriptValueOperator) {
return scriptValueOperator;
} else {
assertUnreachable(scriptValueOperator);
return "eq";
}
}
for (const operation of rpnTokens) {
if (operation.type === "VAR") {
stack.push({
type: "variable",
value: operation.symbol.replace(/\$/g, "").replace(/^0/g, ""),
});
} else if (operation.type === "VAL") {
stack.push({
type: "number",
value: operation.value,
});
} else Iif (operation.type === "CONST") {
stack.push({
type: "constant",
value: operation.symbol,
});
} else if (operation.type === "OP") {
const scriptValueOperator = mapOperator(operation.operator);
if (isValueUnaryOperatorType(scriptValueOperator)) {
const value = stack.pop();
if (value) {
stack.push({
type: scriptValueOperator,
value,
});
}
} else {
const valueB = stack.pop();
const valueA = stack.pop();
if (valueA && valueB) {
stack.push({
type: scriptValueOperator,
valueA,
valueB,
});
}
}
} else if (operation.type === "FUN") {
if (operation.function === "min") {
const valueB = stack.pop();
const valueA = stack.pop();
if (valueA && valueB) {
stack.push({
type: "min",
valueA,
valueB,
});
}
} else if (operation.function === "max") {
const valueB = stack.pop();
const valueA = stack.pop();
if (valueA && valueB) {
stack.push({
type: "max",
valueA,
valueB,
});
}
} else if (operation.function === "abs") {
const value = stack.pop();
if (value) {
stack.push({
type: "abs",
value,
});
}
} else if (operation.function === "rnd") {
const value = stack.pop();
if (value) {
stack.push({
type: "rnd",
value,
});
}
} else if (operation.function === "isqrt") {
const value = stack.pop();
if (value) {
stack.push({
type: "isqrt",
value,
});
}
} else if (operation.function === "atan2") {
const valueB = stack.pop();
const valueA = stack.pop();
if (valueA && valueB) {
stack.push({
type: "atan2",
valueA,
valueB,
});
}
} else E{
/* istanbul ignore next: unreachable */
assertUnreachable(operation.function);
}
} else E{
/* istanbul ignore next: unreachable */
assertUnreachable(operation);
}
}
return stack.length === 1 ? stack[0] : zero;
} catch (e) {
return zero;
}
};
export const walkScriptValue = (
input: ScriptValue,
fn: (val: ScriptValue) => void
): void => {
fn(input);
if ("valueA" in input && input.valueA) {
walkScriptValue(input.valueA, fn);
}
if ("valueB" in input && input.valueB) {
walkScriptValue(input.valueB, fn);
}
if ("value" in input && input.value && isUnaryOperation(input)) {
walkScriptValue(input.value, fn);
}
};
// recursively search script value for matching node, stop iterating on first match
export const someInScriptValue = (
input: ScriptValue,
fn: (val: ScriptValue) => boolean
): boolean => {
const stack: ScriptValue[] = [input];
while (stack.length > 0) {
const currentNode = stack.pop();
Iif (!currentNode) continue;
if (fn(currentNode)) {
return true;
}
if ("valueA" in currentNode && "valueB" in currentNode) {
stack.push(currentNode.valueB, currentNode.valueA);
} else if ("value" in currentNode && isUnaryOperation(currentNode)) {
stack.push(currentNode.value);
}
}
return false;
};
export type MappedScriptValue<T> =
| T
| (Omit<RPNUnaryOperation, "value"> & { value: MappedScriptValue<T> })
| (Omit<RPNOperation, "valueA" | "valueB"> & {
valueA: MappedScriptValue<T>;
valueB: MappedScriptValue<T>;
});
export const mapScriptValueLeafNodes = <T>(
input: ScriptValue,
fn: (val: ScriptValueAtom) => T
): MappedScriptValue<T> => {
if (isValueOperation(input)) {
const mappedA = input.valueA && mapScriptValueLeafNodes(input.valueA, fn);
const mappedB = input.valueB && mapScriptValueLeafNodes(input.valueB, fn);
return {
...input,
valueA: mappedA,
valueB: mappedB,
};
}
Iif (isUnaryOperation(input)) {
const mapped = input.value && mapScriptValueLeafNodes(input.value, fn);
return {
...input,
value: mapped,
};
}
return fn(input);
};
export const extractScriptValueActorIds = (input: ScriptValue): string[] => {
const actorIds: string[] = [];
walkScriptValue(input, (val) => {
Iif (val.type === "property" && !actorIds.includes(val.target)) {
actorIds.push(val.target);
}
});
return actorIds;
};
export const extractScriptValueVariables = (input: ScriptValue): string[] => {
const variables: string[] = [];
walkScriptValue(input, (val) => {
if (val.type === "variable" && !variables.includes(val.value)) {
variables.push(val.value);
} else if (val.type === "expression") {
const text = val.value;
if (text && typeof text === "string") {
const expressionValue = expressionToScriptValue(text);
const expressionVariables =
extractScriptValueVariables(expressionValue);
for (const expressionVariable of expressionVariables) {
if (!variables.includes(expressionVariable)) {
variables.push(expressionVariable);
}
}
}
}
});
return variables;
};
// recursively search script value for node containing variable, stop iterating on first match
export const variableInScriptValue = (
variable: string,
input: ScriptValue
): boolean => {
return someInScriptValue(input, (val) => {
if (val.type === "variable" && val.value === variable) {
return true;
} else if (val.type === "expression") {
const text = val.value;
if (text && typeof text === "string") {
const expressionValue = expressionToScriptValue(text);
return variableInScriptValue(variable, expressionValue);
}
}
return false;
});
};
export const constantInScriptValue = (
constantId: string,
input: ScriptValue
): boolean => {
return someInScriptValue(input, (val) => {
if (val.type === "constant" && val.value === constantId) {
return true;
} else Iif (val.type === "expression") {
const text = val.value;
Iif (text && typeof text === "string") {
const expressionValue = expressionToScriptValue(text);
return constantInScriptValue(constantId, expressionValue);
}
}
return false;
});
};
export const precompileScriptValue = (
input: ScriptValue,
localsLabel = "",
rpnOperations: PrecompiledValueRPNOperation[] = [],
fetchOperations: PrecompiledValueFetch[] = []
): [PrecompiledValueRPNOperation[], PrecompiledValueFetch[]] => {
if (input.type === "property" || input.type === "expression") {
const localName = `local_${localsLabel}${fetchOperations.length}`;
rpnOperations.push({
type: "local",
value: localName,
});
fetchOperations.push({
local: localName,
value: input,
});
} else if (isValueOperation(input)) {
if (input.valueA) {
precompileScriptValue(
input.valueA,
localsLabel,
rpnOperations,
fetchOperations
);
}
if (input.valueB) {
precompileScriptValue(
input.valueB,
localsLabel,
rpnOperations,
fetchOperations
);
}
rpnOperations.push({
type: input.type,
});
} else Iif (isUnaryOperation(input)) {
Iif (input.value) {
precompileScriptValue(
input.value,
localsLabel,
rpnOperations,
fetchOperations
);
}
rpnOperations.push({
type: input.type,
});
} else Iif (input.type === "true") {
rpnOperations.push({ type: "number", value: 1 });
} else Iif (input.type === "false") {
rpnOperations.push({ type: "number", value: 0 });
} else Iif (input.type === "constant") {
rpnOperations.push({ type: "constant", value: input.value });
} else {
rpnOperations.push(input);
}
return [rpnOperations, fetchOperations];
};
export const sortFetchOperations = (
input: PrecompiledValueFetch[]
): PrecompiledValueFetch[] => {
return [...input].sort((a, b) => {
if (a.value.type === "property" && b.value.type === "property") {
if (a.value.target === b.value.target) {
// Sort on Prop
return a.value.property.localeCompare(b.value.property);
} else {
// Sort on Target
return a.value.target.localeCompare(b.value.target);
}
}
return a.value.type.localeCompare(b.value.type);
});
};
export const multiplyScriptValueConst = (
value: ScriptValue,
num: number
): ScriptValue => {
return {
type: "mul",
valueA: value,
valueB: {
type: "number",
value: num,
},
};
};
export const shiftLeftScriptValueConst = (
value: ScriptValue,
num: number
): ScriptValue => {
return {
type: "shl",
valueA: value,
valueB: {
type: "number",
value: num,
},
};
};
export const shiftRightScriptValueConst = (
value: ScriptValue,
num: number
): ScriptValue => {
return {
type: "shr",
valueA: value,
valueB: {
type: "number",
value: num,
},
};
};
export const addScriptValueConst = (
value: ScriptValue,
num: number
): ScriptValue => {
return {
type: "add",
valueA: value,
valueB: {
type: "number",
value: num,
},
};
};
export const addScriptValueToScriptValue = (
valueA: ScriptValue,
valueB: ScriptValue
): ScriptValue => {
return {
type: "add",
valueA: valueA,
valueB: valueB,
};
};
export const clampScriptValueConst = (
value: ScriptValue,
min: number,
max: number
): ScriptValue => {
return {
type: "max",
valueA: {
type: "number",
value: min,
},
valueB: {
type: "min",
valueA: {
type: "number",
value: max,
},
valueB: value,
},
};
};
|