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Use our own callstack

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This commit is contained in:
Jordan Eldredge 2021-05-30 14:34:50 -07:00
parent 450180a1e3
commit 219c4d79dd
1 changed files with 8 additions and 7 deletions
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15
packages/webamp-modern/src/maki-interpreter/interpreter.js
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@ -14,6 +14,8 @@ function coerceTypes(var1, var2, val1 /* val2 */) {
export function interpret(start, program, stack = []) {
const { commands, methods, variables, classes } = program;
const callStack = [];
function popStackValue() {
const v = stack.pop();
return v instanceof Variable ? v.getValue() : v;
@ -159,18 +161,17 @@ export function interpret(start, program, stack = []) {
}
// callGlobal
case 25: {
callStack.push(ip);
const offset = command.arg;
// Note: We proxy all yielded values from the child `interpret` out to
// the caller, while capturing the return value, (`value`) for use within the
// VM.
const value = interpret(offset, program, stack);
stack.push(value);
ip = offset - 1; // -1 because we ++ after the switch
break;
}
// return
case 33: {
const aValue = popStackValue();
return aValue;
ip = callStack.pop();
// TODO: Stack protection?
break;
}
// complete
case 40: {