99 lines
3.3 KiB
JavaScript
99 lines
3.3 KiB
JavaScript
/*
|
|
* Copyright (C) 2016 Apple Inc. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
|
|
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
"use strict";
|
|
|
|
class State {
|
|
constructor(program)
|
|
{
|
|
this.values = new CaselessMap();
|
|
this.stringValues = new CaselessMap();
|
|
this.sideState = new WeakMap();
|
|
this.statement = null;
|
|
this.nextLineNumber = 0;
|
|
this.subStack = [];
|
|
this.dataIndex = 0;
|
|
this.program = program;
|
|
this.rng = createRNGWithFixedSeed();
|
|
|
|
let addNative = (name, callback) => {
|
|
this.values.set(name, new NativeFunction(callback));
|
|
};
|
|
|
|
addNative("abs", x => Math.abs(x));
|
|
addNative("atn", x => Math.atan(x));
|
|
addNative("cos", x => Math.cos(x));
|
|
addNative("exp", x => Math.exp(x));
|
|
addNative("int", x => Math.floor(x));
|
|
addNative("log", x => Math.log(x));
|
|
addNative("rnd", () => this.rng());
|
|
addNative("sgn", x => Math.sign(x));
|
|
addNative("sin", x => Math.sin(x));
|
|
addNative("sqr", x => Math.sqrt(x));
|
|
addNative("tan", x => Math.tan(x));
|
|
}
|
|
|
|
getValue(name, numParameters)
|
|
{
|
|
if (this.values.has(name))
|
|
return this.values.get(name);
|
|
|
|
let result;
|
|
if (numParameters == 0)
|
|
result = new NumberValue();
|
|
else {
|
|
let dim = [];
|
|
while (numParameters--)
|
|
dim.push(11);
|
|
result = new NumberArray(dim);
|
|
}
|
|
this.values.set(name, result);
|
|
return result;
|
|
}
|
|
|
|
getSideState(key)
|
|
{
|
|
if (!this.sideState.has(key)) {
|
|
let result = {};
|
|
this.sideState.set(key, result);
|
|
return result;
|
|
}
|
|
return this.sideState.get(key);
|
|
}
|
|
|
|
abort(text)
|
|
{
|
|
if (!this.statement)
|
|
throw new Error("At beginning of execution: " + text);
|
|
throw new Error("At " + this.statement.sourceLineNumber + ": " + text);
|
|
}
|
|
|
|
validate(predicate, text)
|
|
{
|
|
if (!predicate)
|
|
this.abort(text);
|
|
}
|
|
}
|
|
|