mirror of
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3193 lines
117 KiB
JavaScript
3193 lines
117 KiB
JavaScript
// Created by CuriousTorvald on 2020-05-19
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// Version 1.0 Release Date 202?-??-??
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/*
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Copyright (c) 2020 CuriousTorvald
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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if (exec_args !== undefined && exec_args[1] !== undefined && exec_args[1].startsWith("-?")) {
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println("Usage: basic <optional path to basic program>");
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println("When the optional basic program is set, the interpreter will run the program and then quit if successful, remain open if the program had an error.");
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return 0;
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}
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const THEVERSION = "1.0";
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const PROD = false;
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let INDEX_BASE = 0;
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let TRACEON = (!PROD) && true;
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let DBGON = (!PROD) && true;
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let DATA_CURSOR = 0;
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let DATA_CONSTS = [];
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const DEFUNS_BUILD_DEFUNS = true;
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const BASIC_HOME_PATH = "/home/basic/"
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if (system.maxmem() < 8192) {
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println("Out of memory. BASIC requires 8K or more User RAM");
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throw Error("Out of memory");
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}
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let vmemsize = system.maxmem();
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let cmdbuf = []; // index: line number
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let gotoLabels = {};
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let cmdbufMemFootPrint = 0;
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let prompt = "Ok";
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let prescan = false;
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/* if string can be FOR REAL cast to number */
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function isNumable(s) {
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return s !== undefined && (typeof s.trim == "function" && s.trim() !== "" || s.trim == undefined) && !isNaN(s);
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}
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function cloneObject(o) { return JSON.parse(JSON.stringify(o)); }
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class ParserError extends Error {
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constructor(...args) {
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super(...args);
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Error.captureStackTrace(this, ParserError);
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}
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}
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class InternalError extends Error {
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constructor(...args) {
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super(...args);
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Error.captureStackTrace(this, ParserError);
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}
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}
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let lang = {};
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lang.badNumberFormat = Error("Illegal number format");
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lang.badOperatorFormat = Error("Illegal operator format");
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lang.divByZero = Error("Division by zero");
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lang.badFunctionCallFormat = function(reason) {
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return Error("Illegal function call" + ((reason) ? ": "+reason : ""));
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};
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lang.unmatchedBrackets = Error("Unmatched brackets");
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lang.missingOperand = Error("Missing operand");
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lang.noSuchFile = Error("No such file");
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lang.outOfData = function(line) {
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return Error("Out of DATA"+(line !== undefined ? (" in "+line) : ""));
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};
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lang.nextWithoutFor = function(line, varname) {
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return Error("NEXT "+((varname !== undefined) ? ("'"+varname+"'") : "")+"without FOR in "+line);
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};
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lang.syntaxfehler = function(line, reason) {
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return Error("Syntax error" + ((line !== undefined) ? (" in "+line) : "") + ((reason !== undefined) ? (": "+reason) : ""));
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};
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lang.illegalType = function(line, obj) {
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return Error("Type mismatch" + ((obj !== undefined) ? ` "${obj} (typeof ${typeof obj})"` : "") + ((line !== undefined) ? (" in "+line) : ""));
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};
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lang.refError = function(line, obj) {
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serial.printerr(`${line} Unresolved reference:`);
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serial.printerr(` object: ${obj}, typeof: ${typeof obj}`);
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if (obj !== null && obj !== undefined) serial.printerr(` entries: ${Object.entries(obj)}`);
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return Error("Unresolved reference" + ((obj !== undefined) ? ` "${obj}"` : "") + ((line !== undefined) ? (" in "+line) : ""));
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};
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lang.nowhereToReturn = function(line) { return "RETURN without GOSUB in " + line; };
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lang.errorinline = function(line, stmt, errobj) {
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return Error('Error'+((line !== undefined) ? (" in "+line) : "")+' on statement "'+stmt+'": '+errobj);
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};
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lang.parserError = function(line, errorobj) {
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return Error("Parser error in " + line + ": " + errorobj);
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};
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lang.outOfMem = function(line) {
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return Error("Out of memory in " + line);
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};
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lang.dupDef = function(line, varname) {
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return Error("Duplicate definition"+((varname !== undefined) ? (" on "+varname) : "")+" in "+line);
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};
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lang.asgnOnConst = function(line, constname) {
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return Error('Trying to modify constant "'+constname+'" in '+line);
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};
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lang.subscrOutOfRng = function(line, object, index, maxlen) {
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return Error("Subscript out of range"+(object !== undefined ? (' for "'+object+'"') : '')+(index !== undefined ? (` (index: ${index}, len: ${maxlen})`) : "")+(line !== undefined ? (" in "+line) : ""));
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};
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lang.aG = " arguments were given";
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lang.ord = function(n) {
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if (n % 10 == 1 && n % 100 != 11) return n+"st";
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if (n % 10 == 2 && n % 100 != 12) return n+"nd";
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if (n % 10 == 3 && n % 100 != 13) return n+"rd";
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return n+"th";
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}
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Object.freeze(lang);
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let fs = {};
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fs._close = function(portNo) {
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com.sendMessage(portNo, "CLOSE");
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};
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fs._flush = function(portNo) {
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com.sendMessage(portNo, "FLUSH");
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};
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// @return true if operation committed successfully, false if:
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// - opening file with R-mode and target file does not exists
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// throws if:
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// - java.lang.NullPointerException if path is null
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// - Error if operation mode is not "R", "W" nor "A"
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fs.open = function(path, operationMode) {
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var port = _BIOS.FIRST_BOOTABLE_PORT;
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fs._flush(port[0]); fs._close(port[0]);
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var mode = operationMode.toUpperCase();
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if (mode != "R" && mode != "W" && mode != "A") {
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throw Error("Unknown file opening mode: " + mode);
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}
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com.sendMessage(port[0], "OPEN"+mode+'"'+BASIC_HOME_PATH+path+'",'+port[1]);
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let response = com.getStatusCode(port[0]);
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return (response == 0);
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};
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// @return the entire contents of the file in String
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fs.readAll = function() {
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var port = _BIOS.FIRST_BOOTABLE_PORT;
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com.sendMessage(port[0], "READ");
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var response = com.getStatusCode(port[0]);
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if (135 == response) {
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throw Error("File not opened");
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}
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if (response < 0 || response >= 128) {
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throw Error("Reading a file failed with "+response);
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}
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return com.pullMessage(port[0]);
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};
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fs.write = function(string) {
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var port = _BIOS.FIRST_BOOTABLE_PORT;
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com.sendMessage(port[0], "WRITE"+string.length);
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var response = com.getStatusCode(port[0]);
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if (135 == response) {
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throw Error("File not opened");
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}
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if (response < 0 || response >= 128) {
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throw Error("Writing a file failed with "+response);
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}
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com.sendMessage(port[0], string);
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fs._flush(port[0]); fs._close(port[0]);
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};
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Object.freeze(fs);
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// implement your own con object here
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// requirements: reset_graphics(), getch(), curs_set(int), hitterminate(), resetkeybuf(), addch(int)
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let getUsedMemSize = function() {
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var varsMemSize = 0;
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Object.entries(bStatus.vars).forEach((pair, i) => {
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var object = pair[1];
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if (Array.isArray(object)) {
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// TODO test 1-D array
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varsMemSize += object.length * 8;
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}
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else if (!isNaN(object)) varsMemSize += 8;
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else if (typeof object === "string" || object instanceof String) varsMemSize += object.length;
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else varsMemSize += 1;
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});
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return varsMemSize + cmdbufMemFootPrint; // + array's dimsize * 8 + variables' sizeof literal + functions' expression length
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}
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let reLineNum = /^[0-9]+ /;
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//var reFloat = /^([\-+]?[0-9]*[.][0-9]+[eE]*[\-+0-9]*[fF]*|[\-+]?[0-9]+[.eEfF][0-9+\-]*[fF]?)$/;
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//var reDec = /^([\-+]?[0-9_]+)$/;
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//var reHex = /^(0[Xx][0-9A-Fa-f_]+)$/;
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//var reBin = /^(0[Bb][01_]+)$/;
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// must match partial
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let reNumber = /([0-9]*[.][0-9]+[eE]*[\-+0-9]*[fF]*|[0-9]+[.eEfF][0-9+\-]*[fF]?)|([0-9_]+)|(0[Xx][0-9A-Fa-f_]+)|(0[Bb][01_]+)/;
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//let reOps = /\^|;|\*|\/|\+|\-|[<>=]{1,2}/;
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let reNum = /[0-9]+/;
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let tbasexit = false;
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const greetText = `Terran BASIC ${THEVERSION} `+String.fromCharCode(179)+" Scratchpad Memory: "+vmemsize+" bytes";
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const greetLeftPad = (80 - greetText.length) >> 1;
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const greetRightPad = 80 - greetLeftPad - greetText.length;
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con.color_pair(0,253);
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print(" ".repeat(greetLeftPad)+greetText+" ".repeat(greetRightPad));
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con.color_pair(239,255);
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println();
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println(prompt);
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// variable object constructor
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/** variable object constructor
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* @param literal Javascript object or primitive
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* @type derived from JStoBASICtype + "usrdefun" + "internal_arrindexing_lazy" + "internal_assignment_object"
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* @see bStatus.builtin["="]
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*/
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let BasicVar = function(literal, type) {
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this.bvLiteral = literal;
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this.bvType = type;
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}
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// Abstract Syntax Tree
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// creates empty tree node
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let astToString = function(ast, depth) {
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let l__ = String.fromCharCode(0x2502,32);
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let recDepth = depth || 0;
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if (ast === undefined || ast.astType === undefined) return "";
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var sb = "";
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var marker = ("lit" == ast.astType) ? "i" :
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("op" == ast.astType) ? String.fromCharCode(0xB1) :
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("string" == ast.astType) ? String.fromCharCode(0xB6) :
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("num" == ast.astType) ? String.fromCharCode(0xA2) :
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("array" == ast.astType) ? "[" :
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("defun_args" === ast.astType) ? String.fromCharCode(0x3B4) : String.fromCharCode(0x192);
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sb += l__.repeat(recDepth) + marker+" Line "+ast.astLnum+" ("+ast.astType+")\n";
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sb += l__.repeat(recDepth+1) + "leaves: "+(ast.astLeaves.length)+"\n";
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sb += l__.repeat(recDepth+1) + "value: "+ast.astValue+" (type: "+typeof ast.astValue+")\n";
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for (var k = 0; k < ast.astLeaves.length; k++) {
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sb += astToString(ast.astLeaves[k], recDepth + 1);
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sb += l__.repeat(recDepth+1) + " " + ast.astSeps[k] + "\n";
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}
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sb += l__.repeat(recDepth)+String.fromCharCode(0x2570)+String.fromCharCode(0x2500).repeat(13)+'\n';
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return sb;
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}
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let BasicAST = function() {
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this.astLnum = 0;
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this.astLeaves = [];
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this.astSeps = [];
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this.astValue = undefined;
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this.astType = "null"; // lit, op, string, num, array, function, null, defun_args (! NOT usrdefun !)
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}
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let literalTypes = ["string", "num", "bool", "array", "generator", "usrdefun"];
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/*
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@param variable SyntaxTreeReturnObj, of which the 'troType' is defined in BasicAST.
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@return a value, if the input type if string or number, its literal value will be returned. Otherwise will search the
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BASIC variable table and return the literal value of the BasicVar; undefined will be returned if no such var exists.
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*/
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let resolve = function(variable) {
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// head error checking
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if (variable.troType === undefined) {
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// primitves types somehow injected from elsewhere (main culprit: MAP)
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//throw Error(`BasicIntpError: trying to resolve unknown object '${variable}' with entries ${Object.entries(variable)}`);
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if (isNumable(variable)) return variable*1;
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if (Array.isArray(variable)) return variable;
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if (typeof variabe == "object")
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throw Error(`BasicIntpError: trying to resolve unknown object '${variable}' with entries ${Object.entries(variable)}`);
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return variable;
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}
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else if (variable.troType === "internal_arrindexing_lazy")
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return eval("variable.troValue.arrFull"+variable.troValue.arrKey);
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else if (literalTypes.includes(variable.troType) || variable.troType.startsWith("internal_"))
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return variable.troValue;
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else if (variable.troType == "lit") {
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var basicVar = bStatus.vars[variable.troValue];
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if (basicVar.bvLiteral === "") return "";
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return (basicVar !== undefined) ? basicVar.bvLiteral : undefined;
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}
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else if (variable.troType == "null")
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return undefined;
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// tail error checking
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else
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throw Error("BasicIntpError: unknown variable/object with type "+variable.troType+", with value "+variable.troValue);
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}
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let curryDefun = function(inputTree, inputValue) {
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let exprTree = cloneObject(inputTree);
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let value = cloneObject(inputValue);
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bF._recurseApplyAST(exprTree, it => {
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if (it.astType == "defun_args") {
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/*if (DBGON) {
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serial.println("[curryDefun] found defun_args #"+it.astValue);
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serial.println(astToString(it));
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}*/
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// apply arg0 into the tree
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if (it.astValue == 0) {
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let valueType = JStoBASICtype(value);
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if (valueType === "usrdefun") {
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it.astLnum = value.astLnum;
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it.astLeaves = value.astLeaves;
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it.astSeps = value.astSeps;
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it.astValue = value.astValue
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it.astType = value.astType;
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}
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else {
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it.astType = valueType
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it.astValue = value;
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}
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//if (DBGON) serial.println("[curryDefun] applying value "+value);
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}
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// shift down arg index
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else {
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it.astValue -= 1;
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//if (DBGON) serial.println("[curryDefun] decrementing arg index");
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}
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/*if (DBGON) {
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serial.println("[curryDefun] after the task:");
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serial.println(astToString(it));
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}*/
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}
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});
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return exprTree;
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}
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let argCheckErr = function(lnum, o) {
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if (o === undefined || o.troType == "null") throw lang.refError(lnum, o);
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if (o.troType == "lit" && bStatus.vars[o.troValue] === undefined) throw lang.refError(lnum, o);
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}
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let oneArg = function(lnum, stmtnum, args, action) {
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if (args.length != 1) throw lang.syntaxfehler(lnum, args.length+lang.aG);
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argCheckErr(lnum, args[0]);
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var rsvArg0 = resolve(args[0]);
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return action(rsvArg0);
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}
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let oneArgNum = function(lnum, stmtnum, args, action) {
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if (args.length != 1) throw lang.syntaxfehler(lnum, args.length+lang.aG);
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argCheckErr(lnum, args[0]);
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var rsvArg0 = resolve(args[0]);
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if (isNaN(rsvArg0)) throw lang.illegalType(lnum, args[0]);
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return action(rsvArg0);
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}
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let twoArg = function(lnum, stmtnum, args, action) {
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if (args.length != 2) throw lang.syntaxfehler(lnum, args.length+lang.aG);
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argCheckErr(lnum, args[0]);
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var rsvArg0 = resolve(args[0]);
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argCheckErr(lnum, args[1]);
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var rsvArg1 = resolve(args[1]);
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return action(rsvArg0, rsvArg1);
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}
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let twoArgNum = function(lnum, stmtnum, args, action) {
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if (args.length != 2) throw lang.syntaxfehler(lnum, args.length+lang.aG);
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argCheckErr(lnum, args[0]);
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var rsvArg0 = resolve(args[0]);
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if (isNaN(rsvArg0)) throw lang.illegalType(lnum, "LH:"+Object.entries(args[0]));
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argCheckErr(lnum, args[1]);
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var rsvArg1 = resolve(args[1]);
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if (isNaN(rsvArg1)) throw lang.illegalType(lnum, "RH:"+Object.entries(args[1]));
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return action(rsvArg0, rsvArg1);
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}
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let threeArg = function(lnum, stmtnum, args, action) {
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if (args.length != 3) throw lang.syntaxfehler(lnum, args.length+lang.aG);
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argCheckErr(lnum, args[0]);
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var rsvArg0 = resolve(args[0]);
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argCheckErr(lnum, args[1]);
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var rsvArg1 = resolve(args[1]);
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argCheckErr(lnum, args[2]);
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var rsvArg2 = resolve(args[2]);
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return action(rsvArg0, rsvArg1, rsvArg2);
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}
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let threeArgNum = function(lnum, stmtnum, args, action) {
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if (args.length != 3) throw lang.syntaxfehler(lnum, args.length+lang.aG);
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if (rsvArg0 === undefined) throw lang.refError(lnum, args[0]);
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argCheckErr(lnum, args[0]);
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if (isNaN(rsvArg0)) throw lang.illegalType(lnum, args[0]);
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if (rsvArg1 === undefined) throw lang.refError(lnum, args[1]);
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argCheckErr(lnum, args[1]);
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if (isNaN(rsvArg1)) throw lang.illegalType(lnum, args[1]);
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if (rsvArg2 === undefined) throw lang.refError(lnum, args[2]);
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argCheckErr(lnum, args[2]);
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if (isNaN(rsvArg2)) throw lang.illegalType(lnum, args[2]);
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return action(rsvArg0, rsvArg1, rsvArg2);
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}
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let varArg = function(lnum, stmtnum, args, action) {
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var rsvArg = args.map((it) => {
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argCheckErr(lnum, it);
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var r = resolve(it);
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return r;
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});
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return action(rsvArg);
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}
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let varArgNum = function(lnum, stmtnum, args, action) {
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var rsvArg = args.map((it) => {
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argCheckErr(lnum, it);
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var r = resolve(it);
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if (isNaN(r)) throw lang.illegalType(lnum, r);
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return r;
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});
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return action(rsvArg);
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}
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let _primesgen = function() {
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let primesgen = new ForGen(2,0);
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primesgen.hasNext = (_) => true;
|
|
primesgen.getNext = function(_) {
|
|
do {
|
|
primesgen.current += 1;
|
|
} while (!(function(n){
|
|
if (n == 2 || n == 3) return true;
|
|
if (n % 2 == 0 || n % 3 == 0) return false;
|
|
for (let i = 5; i * i <= n; i = i + 6)
|
|
if (n % i == 0 || n % (i + 2) == 0)
|
|
return false;
|
|
return true;
|
|
})(primesgen.current));
|
|
|
|
return primesgen.current;
|
|
};
|
|
primesgen.toString = (_) => "Generator: primes";
|
|
return primesgen;
|
|
}
|
|
let _basicConsts = {
|
|
"NIL": new BasicVar([], "array"),
|
|
"PI": new BasicVar(Math.PI, "num"),
|
|
"TAU": new BasicVar(Math.PI * 2.0, "num"),
|
|
"EULER": new BasicVar(Math.E, "num"),
|
|
"PRIMES": new BasicVar(_primesgen, "generator")
|
|
};
|
|
Object.freeze(_basicConsts);
|
|
let initBvars = function() {
|
|
return cloneObject(_basicConsts);
|
|
}
|
|
let ForGen = function(s,e,t) {
|
|
this.start = s;
|
|
this.end = e;
|
|
this.step = t || 1;
|
|
|
|
this.current = this.start;
|
|
this.stepsgn = (this.step > 0) ? 1 : -1;
|
|
|
|
this.hasNext = function() {
|
|
return this.current*this.stepsgn + this.step*this.stepsgn <= (this.end + this.step)*this.stepsgn;
|
|
// 1 to 10 step 1
|
|
// 1 + 1 <= 11 -> true
|
|
// 10 + 1 <= 11 -> true
|
|
// 11 + 1 <= 11 -> false
|
|
|
|
// 10 to 1 step -1
|
|
// -10 + 1 <= 0 -> true
|
|
// -1 + 1 <= 0 -> true
|
|
// 0 + 1 <= 0 -> false
|
|
}
|
|
|
|
// mutableVar: the actual number stored into the FOR-Variable, because BASIC's FOR-Var is mutable af
|
|
// returns undefined if there is no next()
|
|
this.getNext = function(mutated) {
|
|
//if (mutated === undefined) throw "InternalError: parametre is missing";
|
|
if (mutated !== undefined) this.current = (mutated|0);
|
|
this.current += this.step;
|
|
//serial.println(`[BASIC.FORGEN] ${(mutated|0)} -> ${this.current}`);
|
|
return this.hasNext() ? this.current : undefined;
|
|
}
|
|
|
|
this.toArray = function() {
|
|
let a = [];
|
|
let cur = this.start;
|
|
while (cur*this.stepsgn + this.step*this.stepsgn <= (this.end + this.step)*this.stepsgn) {
|
|
a.push(cur);
|
|
cur += this.step;
|
|
}
|
|
return a;
|
|
}
|
|
this.reset = function() {
|
|
this.current = this.start;
|
|
}
|
|
this.toString = function() {
|
|
return `Generator: ${this.start} to ${this.end}`+((this.step !== 1) ? ` step ${this.step}` : '');
|
|
}
|
|
}
|
|
let bStatus = {};
|
|
bStatus.gosubStack = [];
|
|
bStatus.forLnums = {}; // key: forVar, value: [lnum, stmtnum]
|
|
bStatus.forStack = []; // forVars only
|
|
bStatus.vars = initBvars(); // contains instances of BasicVars
|
|
bStatus.rnd = 0; // stores mantissa (23 bits long) of single precision floating point number
|
|
bStatus.getDimSize = function(array, dim) {
|
|
var dims = [];
|
|
while (true) {
|
|
dims.push(array.length);
|
|
|
|
if (Array.isArray(array[0]))
|
|
array = array[0];
|
|
else
|
|
break;
|
|
}
|
|
return dims[dim];
|
|
};
|
|
bStatus.getArrayIndexFun = function(lnum, stmtnum, arrayName, array) {
|
|
if (lnum === undefined || stmtnum === undefined) throw Error(`Line or statement number is undefined: (${lnum},${stmtnum})`);
|
|
|
|
return function(lnum, stmtnum, args, seps) {
|
|
if (lnum === undefined || stmtnum === undefined) throw Error(`Line or statement number is undefined: (${lnum},${stmtnum})`);
|
|
|
|
// NOTE: BASIC arrays are index in column-major order, which is OPPOSITE of C/JS/etc.
|
|
return varArgNum(lnum, stmtnum, args, (dims) => {
|
|
if (TRACEON) serial.println("ar dims: "+dims);
|
|
|
|
let dimcnt = 1;
|
|
let oldIndexingStr = "";
|
|
let indexingstr = "";
|
|
|
|
dims.forEach(d => {
|
|
oldIndexingStr = indexingstr;
|
|
indexingstr += `[${d-INDEX_BASE}]`;
|
|
|
|
var testingArr = eval(`array${indexingstr}`);
|
|
if (testingArr === undefined)
|
|
throw lang.subscrOutOfRng(lnum, `${arrayName}${oldIndexingStr} (${lang.ord(dimcnt)} dim)`, d-INDEX_BASE, bStatus.getDimSize(array, dimcnt-1));
|
|
|
|
dimcnt += 1;
|
|
});
|
|
|
|
if (TRACEON)
|
|
serial.println("ar indexedValue = "+`/*ar1*/array${indexingstr}`);
|
|
|
|
return {arrFull: array, arrName: arrayName, arrKey: indexingstr};
|
|
});
|
|
};
|
|
};
|
|
bStatus.getDefunThunk = function(lnum, stmtnum, exprTree) {
|
|
if (lnum === undefined || stmtnum === undefined) throw Error(`Line or statement number is undefined: (${lnum},${stmtnum})`);
|
|
|
|
let tree = cloneObject(exprTree); // ALWAYS create new tree instance!
|
|
return function(lnum, stmtnum, args, seps) {
|
|
if (lnum === undefined || stmtnum === undefined) throw Error(`Line or statement number is undefined: (${lnum},${stmtnum})`);
|
|
|
|
let argsMap = [];
|
|
args.map(it => {
|
|
argCheckErr(lnum, it);
|
|
return resolve(it);
|
|
}).forEach(arg => argsMap.push(arg));
|
|
|
|
if (DBGON) {
|
|
serial.println("[BASIC.getDefunThunk.invoke] unthunking: ");
|
|
serial.println(astToString(tree));
|
|
serial.println("[BASIC.getDefunThunk.invoke] thunk args:");
|
|
serial.println(argsMap);
|
|
}
|
|
|
|
// perform renaming
|
|
bF._recurseApplyAST(tree, (it) => {
|
|
if ("defun_args" == it.astType) {
|
|
if (DBGON) {
|
|
serial.println("[BASIC.getDefunThunk.invoke] thunk renaming arg-tree branch:");
|
|
serial.println(astToString(it));
|
|
}
|
|
|
|
let argsIndex = it.astValue;
|
|
let theArg = argsMap[argsIndex]; // instanceof theArg == resolved version of SyntaxTreeReturnObj
|
|
|
|
if (theArg !== undefined) { // this "forgiveness" is required to implement currying
|
|
if (DBGON) {
|
|
serial.println("[BASIC.getDefunThunk.invoke] thunk renaming-theArg: "+theArg);
|
|
serial.println(Object.entries(theArg));
|
|
}
|
|
|
|
it.astValue = theArg;
|
|
it.astType = JStoBASICtype(theArg);
|
|
}
|
|
|
|
if (DBGON) {
|
|
serial.println("[BASIC.getDefunThunk.invoke] thunk successfully renamed arg-tree branch:");
|
|
serial.println(astToString(it));
|
|
}
|
|
}
|
|
});
|
|
|
|
if (DBGON) {
|
|
serial.println("[BASIC.getDefunThunk.invoke] resulting thunk tree:");
|
|
serial.println(astToString(tree));
|
|
}
|
|
|
|
// evaluate new tree
|
|
return resolve(bF._executeSyntaxTree(lnum, stmtnum, tree, 0));
|
|
}
|
|
};
|
|
/* Accepts troValue, assignes to BASIC variable, and returns internal_assign_object
|
|
* @params troValue Variable to assign into
|
|
* @params rh the value, resolved
|
|
*/
|
|
bStatus.addAsBasicVar = function(lnum, troValue, rh) {
|
|
if (troValue.arrFull !== undefined) { // assign to existing array
|
|
if (Array.isArray(rh)) throw lang.illegalType(lnum, rh); // no ragged array!
|
|
let arr = eval("troValue.arrFull"+troValue.arrKey);
|
|
if (Array.isArray(arr)) throw lang.subscrOutOfRng(lnum, arr);
|
|
eval("troValue.arrFull"+troValue.arrKey+"=rh");
|
|
return {asgnVarName: troValue.arrName, asgnValue: rh};
|
|
}
|
|
else {
|
|
let varname = troValue.toUpperCase();
|
|
//println("input varname: "+varname);
|
|
let type = JStoBASICtype(rh);
|
|
if (_basicConsts[varname]) throw lang.asgnOnConst(lnum, varname);
|
|
bStatus.vars[varname] = new BasicVar(rh, type);
|
|
return {asgnVarName: varname, asgnValue: rh};
|
|
}
|
|
}
|
|
bStatus.builtin = {
|
|
/*
|
|
@param lnum line number
|
|
@param args instance of the SyntaxTreeReturnObj
|
|
|
|
if no args were given (e.g. "10 NEXT()"), args[0] will be: {troType: null, troValue: , troNextLine: 11}
|
|
if no arg text were given (e.g. "10 NEXT"), args will have zero length
|
|
*/
|
|
"=" : {f:function(lnum, stmtnum, args) {
|
|
// THIS FUNCTION MUST BE COPIED TO 'INPUT'
|
|
if (args.length != 2) throw lang.syntaxfehler(lnum, args.length+lang.aG);
|
|
var troValue = args[0].troValue;
|
|
|
|
var rh = resolve(args[1]);
|
|
if (rh === undefined) throw lang.refError(lnum, "RH:"+args[1].troValue);
|
|
|
|
if (isNumable(rh)) rh = rh*1 // if string we got can be cast to number, do it
|
|
|
|
//println(lnum+" = lh: "+Object.entries(args[0]));
|
|
//println(lnum+" = rh raw: "+Object.entries(args[1]));
|
|
//println(lnum+" = rh resolved: "+rh);
|
|
//try { println(lnum+" = rh resolved entries: "+Object.entries(rh)); }
|
|
//catch (_) {}
|
|
|
|
return bStatus.addAsBasicVar(lnum, troValue, rh);
|
|
}},
|
|
"IN" : {f:function(lnum, stmtnum, args) { // almost same as =, but don't actually make new variable. Used by FOR statement
|
|
if (args.length != 2) throw lang.syntaxfehler(lnum, args.length+lang.aG);
|
|
var troValue = args[0].troValue;
|
|
|
|
var rh = resolve(args[1]);
|
|
if (rh === undefined) throw lang.refError(lnum, "RH:"+args[1].troValue);
|
|
|
|
if (troValue.arrFull !== undefined) {
|
|
throw lang.syntaxfehler(lnum);
|
|
}
|
|
else {
|
|
var varname = troValue.toUpperCase();
|
|
var type = JStoBASICtype(rh);
|
|
if (_basicConsts[varname]) throw lang.asgnOnConst(lnum, varname);
|
|
return {asgnVarName: varname, asgnValue: rh};
|
|
}
|
|
}},
|
|
"==" : {f:function(lnum, stmtnum, args) {
|
|
return twoArg(lnum, stmtnum, args, (lh,rh) => lh == rh);
|
|
}},
|
|
"<>" : {f:function(lnum, stmtnum, args) {
|
|
return twoArg(lnum, stmtnum, args, (lh,rh) => lh != rh);
|
|
}},
|
|
"><" : {f:function(lnum, stmtnum, args) {
|
|
return twoArg(lnum, stmtnum, args, (lh,rh) => lh != rh);
|
|
}},
|
|
"<=" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => lh <= rh);
|
|
}},
|
|
"=<" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => lh <= rh);
|
|
}},
|
|
">=" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => lh >= rh);
|
|
}},
|
|
"=>" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => lh >= rh);
|
|
}},
|
|
"<" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => lh < rh);
|
|
}},
|
|
">" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => lh > rh);
|
|
}},
|
|
"<<" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => lh << rh);
|
|
}},
|
|
">>" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => lh >>> rh);
|
|
}},
|
|
"UNARYMINUS" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => -lh);
|
|
}},
|
|
"UNARYPLUS" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => +lh);
|
|
}},
|
|
"UNARYLOGICNOT" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => !(lh));
|
|
}},
|
|
"UNARYBNOT" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => ~(lh));
|
|
}},
|
|
"BAND" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => lh & rh);
|
|
}},
|
|
"BOR" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => lh | rh);
|
|
}},
|
|
"BXOR" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => lh ^ rh);
|
|
}},
|
|
"!" : {f:function(lnum, stmtnum, args) { // Haskell-style CONS
|
|
return twoArg(lnum, stmtnum, args, (lh,rh) => {
|
|
if (isNaN(lh))
|
|
throw lang.illegalType(lnum, lh); // BASIC array is numbers only
|
|
if (!Array.isArray(rh))
|
|
throw lang.illegalType(lnum, rh);
|
|
return [lh].concat(rh);
|
|
});
|
|
}},
|
|
"~" : {f:function(lnum, stmtnum, args) { // array PUSH
|
|
return twoArg(lnum, stmtnum, args, (lh,rh) => {
|
|
if (isNaN(rh))
|
|
throw lang.illegalType(lnum, rh); // BASIC array is numbers only
|
|
if (!Array.isArray(lh))
|
|
throw lang.illegalType(lnum, lh);
|
|
return lh.concat([rh]);
|
|
});
|
|
}},
|
|
"#" : {f:function(lnum, stmtnum, args) { // array CONCAT
|
|
return twoArg(lnum, stmtnum, args, (lh,rh) => {
|
|
if (!Array.isArray(rh))
|
|
throw lang.illegalType(lnum, rh);
|
|
if (!Array.isArray(lh))
|
|
throw lang.illegalType(lnum, lh);
|
|
return lh.concat(rh);
|
|
});
|
|
}},
|
|
"+" : {f:function(lnum, stmtnum, args) { // addition, string concat
|
|
return twoArg(lnum, stmtnum, args, (lh,rh) => (!isNaN(lh) && !isNaN(rh)) ? (lh*1 + rh*1) : (lh + rh));
|
|
}},
|
|
"-" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => lh - rh);
|
|
}},
|
|
"*" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => lh * rh);
|
|
}},
|
|
"/" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => {
|
|
if (rh == 0) throw lang.divByZero;
|
|
return lh / rh;
|
|
});
|
|
}},
|
|
"\\" : {f:function(lnum, stmtnum, args) { // integer division, rounded towards zero
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => {
|
|
if (rh == 0) throw lang.divByZero;
|
|
return (lh / rh)|0;
|
|
});
|
|
}},
|
|
"MOD" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => {
|
|
if (rh == 0) throw lang.divByZero;
|
|
return lh % rh;
|
|
});
|
|
}},
|
|
"^" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (lh,rh) => {
|
|
let r = Math.pow(lh, rh);
|
|
if (isNaN(r)) throw lang.badFunctionCallFormat();
|
|
if (!isFinite(r)) throw lang.divByZero;
|
|
return r;
|
|
});
|
|
}},
|
|
"TO" : {f:function(lnum, stmtnum, args) {
|
|
return twoArgNum(lnum, stmtnum, args, (from, to) => new ForGen(from, to, 1));
|
|
}},
|
|
"STEP" : {f:function(lnum, stmtnum, args) {
|
|
return twoArg(lnum, stmtnum, args, (gen, step) => {
|
|
if (!(gen instanceof ForGen)) throw lang.illegalType(lnum, gen);
|
|
return new ForGen(gen.start, gen.end, step);
|
|
});
|
|
}},
|
|
"DIM" : {f:function(lnum, stmtnum, args) {
|
|
return varArgNum(lnum, stmtnum, args, (revdims) => {
|
|
let dims = revdims.reverse();
|
|
let arraydec = "Array(dims[0]).fill(0)";
|
|
for (let k = 1; k < dims.length; k++) {
|
|
arraydec = `Array(dims[${k}]).fill().map(_=>${arraydec})`
|
|
}
|
|
return eval(arraydec);
|
|
});
|
|
}},
|
|
"PRINT" : {f:function(lnum, stmtnum, args, seps) {
|
|
if (args.length == 0)
|
|
println();
|
|
else {
|
|
for (var llll = 0; llll < args.length; llll++) {
|
|
// parse separators.
|
|
// ; - concat
|
|
// , - tab
|
|
if (llll >= 1) {
|
|
if (seps[llll - 1] == ",") print("\t");
|
|
}
|
|
|
|
var rsvArg = resolve(args[llll]);
|
|
if (rsvArg === undefined && args[llll] !== undefined && args[llll].troType != "null") throw lang.refError(lnum, args[llll].troValue);
|
|
|
|
//serial.println(`${lnum} PRINT ${lang.ord(llll)} arg: ${Object.entries(args[llll])}, resolved: ${rsvArg}`);
|
|
|
|
let printstr = "";
|
|
if (rsvArg === undefined || rsvArg === "")
|
|
printstr = "";
|
|
else if (rsvArg.toString !== undefined)
|
|
printstr = rsvArg.toString();
|
|
else
|
|
printstr = rsvArg;
|
|
|
|
print(printstr);
|
|
if (TRACEON) serial.println("[BASIC.PRINT] "+printstr);
|
|
}
|
|
}
|
|
|
|
if (args[args.length - 1] !== undefined && args[args.length - 1].troType != "null") println();
|
|
}},
|
|
"EMIT" : {f:function(lnum, stmtnum, args, seps) {
|
|
if (args.length == 0)
|
|
println();
|
|
else {
|
|
for (var llll = 0; llll < args.length; llll++) {
|
|
// parse separators.
|
|
// ; - concat
|
|
// , - tab
|
|
if (llll >= 1) {
|
|
if (seps[llll - 1] == ",") print("\t");
|
|
}
|
|
|
|
var rsvArg = resolve(args[llll]);
|
|
if (rsvArg === undefined && args[llll] !== undefined && args[llll].troType != "null") throw lang.refError(lnum, args[llll].troValue);
|
|
|
|
let printstr = "";
|
|
if (rsvArg === undefined)
|
|
print("")
|
|
else if (!isNaN(rsvArg)) {
|
|
let c = con.getyx();
|
|
con.addch(rsvArg);
|
|
}
|
|
else if (rsvArg.toString !== undefined)
|
|
print(rsvArg.toString());
|
|
else
|
|
printstr = (rsvArg);
|
|
|
|
if (TRACEON) serial.println("[BASIC.EMIT] "+printstr);
|
|
}
|
|
}
|
|
|
|
if (args[args.length - 1] !== undefined && args[args.length - 1].troType != "null") println();
|
|
}},
|
|
"POKE" : {f:function(lnum, stmtnum, args) {
|
|
twoArgNum(lnum, stmtnum, args, (lh,rh) => sys.poke(lh, rh));
|
|
}},
|
|
"PEEK" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => sys.peek(lh));
|
|
}},
|
|
"GOTO" : {f:function(lnum, stmtnum, args) {
|
|
// search from gotoLabels first
|
|
let line = gotoLabels[args[0].troValue];
|
|
// if not found, use resolved variable
|
|
if (line === undefined) line = resolve(args[0]);
|
|
if (line < 0) throw lang.syntaxfehler(lnum, line);
|
|
|
|
return new JumpObj(line, 0, lnum, line);
|
|
}},
|
|
"GOSUB" : {f:function(lnum, stmtnum, args) {
|
|
// search from gotoLabels first
|
|
let line = gotoLabels[args[0].troValue];
|
|
// if not found, use resolved variable
|
|
if (line === undefined) line = resolve(args[0]);
|
|
if (line < 0) throw lang.syntaxfehler(lnum, line);
|
|
|
|
bStatus.gosubStack.push([lnum, stmtnum + 1]);
|
|
//println(lnum+" GOSUB into "+lh);
|
|
return new JumpObj(line, 0, lnum, line);
|
|
}},
|
|
"RETURN" : {f:function(lnum, stmtnum, args) {
|
|
var r = bStatus.gosubStack.pop();
|
|
if (r === undefined) throw lang.nowhereToReturn(lnum);
|
|
//println(lnum+" RETURN to "+r);
|
|
return new JumpObj(r[0], r[1], lnum, r);
|
|
}},
|
|
"CLEAR" : {f:function(lnum, stmtnum, args) {
|
|
bStatus.vars = initBvars();
|
|
}},
|
|
"PLOT" : {f:function(lnum, stmtnum, args) {
|
|
threeArgNum(lnum, stmtnum, args, (xpos, ypos, color) => graphics.plotPixel(xpos, ypos, color));
|
|
}},
|
|
"AND" : {f:function(lnum, stmtnum, args) {
|
|
if (args.length != 2) throw lang.syntaxfehler(lnum, args.length+lang.aG);
|
|
var rsvArg = args.map((it) => resolve(it));
|
|
rsvArg.forEach((v) => {
|
|
if (v === undefined) throw lang.refError(lnum, v);
|
|
if (typeof v !== "boolean") throw lang.illegalType(lnum, v);
|
|
});
|
|
var argum = rsvArg.map((it) => {
|
|
if (it === undefined) throw lang.refError(lnum, it);
|
|
return it;
|
|
});
|
|
return argum[0] && argum[1];
|
|
}},
|
|
"OR" : {f:function(lnum, stmtnum, args) {
|
|
if (args.length != 2) throw lang.syntaxfehler(lnum, args.length+lang.aG);
|
|
var rsvArg = args.map((it) => resolve(it));
|
|
rsvArg.forEach((v) => {
|
|
if (v === undefined) throw lang.refError(lnum, v.value);
|
|
if (typeof v !== "boolean") throw lang.illegalType(lnum, v);
|
|
});
|
|
var argum = rsvArg.map((it) => {
|
|
if (it === undefined) throw lang.refError(lnum, it);
|
|
return it;
|
|
});
|
|
return argum[0] || argum[1];
|
|
}},
|
|
"RND" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => {
|
|
if (!(args.length > 0 && args[0].troValue === 0))
|
|
bStatus.rnd = Math.random();//(bStatus.rnd * 214013 + 2531011) % 16777216; // GW-BASIC does this
|
|
return bStatus.rnd;
|
|
});
|
|
}},
|
|
"ROUND" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => Math.round(lh));
|
|
}},
|
|
"FLOOR" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => Math.floor(lh));
|
|
}},
|
|
"INT" : {f:function(lnum, stmtnum, args) { // synonymous to FLOOR
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => Math.floor(lh));
|
|
}},
|
|
"CEIL" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => Math.ceil(lh));
|
|
}},
|
|
"FIX" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => (lh|0));
|
|
}},
|
|
"CHR" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => String.fromCharCode(lh));
|
|
}},
|
|
"TEST" : {f:function(lnum, stmtnum, args) {
|
|
if (args.length != 1) throw lang.syntaxfehler(lnum, args.length+lang.aG);
|
|
return resolve(args[0]);
|
|
}},
|
|
"FOREACH" : {f:function(lnum, stmtnum, args) { // list comprehension model
|
|
var asgnObj = resolve(args[0]);
|
|
// type check
|
|
if (asgnObj === undefined) throw lang.syntaxfehler(lnum);
|
|
if (!Array.isArray(asgnObj.asgnValue)) throw lang.illegalType(lnum, asgnObj);
|
|
|
|
var varname = asgnObj.asgnVarName;
|
|
|
|
// assign new variable
|
|
// the var itself will have head of the array, and the head itself will be removed from the array
|
|
bStatus.vars[varname] = new BasicVar(asgnObj.asgnValue[0], JStoBASICtype(asgnObj.asgnValue.shift()));
|
|
// stores entire array (sans head) into temporary storage
|
|
bStatus.vars["for var "+varname] = new BasicVar(asgnObj.asgnValue, "array");
|
|
// put the varname to forstack
|
|
bStatus.forLnums[varname] = [lnum, stmtnum];
|
|
bStatus.forStack.push(varname);
|
|
}},
|
|
"FOR" : {f:function(lnum, stmtnum, args) { // generator model
|
|
var asgnObj = resolve(args[0]);
|
|
// type check
|
|
if (asgnObj === undefined) throw lang.syntaxfehler(lnum);
|
|
if (!(asgnObj.asgnValue instanceof ForGen)) throw lang.illegalType(lnum, typeof asgnObj);
|
|
|
|
var varname = asgnObj.asgnVarName;
|
|
var generator = asgnObj.asgnValue;
|
|
|
|
// assign new variable
|
|
// the var itself will have head of the array, and the head itself will be removed from the array
|
|
bStatus.vars[varname] = new BasicVar(generator.start, "num");
|
|
// stores entire array (sans head) into temporary storage
|
|
bStatus.vars["for var "+varname] = new BasicVar(generator, "generator");
|
|
// put the varname to forstack
|
|
bStatus.forLnums[varname] = [lnum, stmtnum];
|
|
bStatus.forStack.push(varname);
|
|
}},
|
|
"NEXT" : {f:function(lnum, stmtnum, args) {
|
|
// if no args were given
|
|
if (args.length == 0 || (args.length == 1 && args.troType == "null")) {
|
|
// go to most recent FOR
|
|
var forVarname = bStatus.forStack.pop();
|
|
//serial.println(lnum+" NEXT > forVarname = "+forVarname);
|
|
if (forVarname === undefined) {
|
|
throw lang.nextWithoutFor(lnum);
|
|
}
|
|
|
|
if (TRACEON) serial.println("[BASIC.FOR] looping "+forVarname);
|
|
|
|
var forVar = bStatus.vars["for var "+forVarname].bvLiteral;
|
|
|
|
if (forVar instanceof ForGen)
|
|
bStatus.vars[forVarname].bvLiteral = forVar.getNext(bStatus.vars[forVarname].bvLiteral);
|
|
else
|
|
bStatus.vars[forVarname].bvLiteral = forVar.shift();
|
|
|
|
if ((bStatus.vars[forVarname].bvLiteral !== undefined)) {
|
|
// feed popped value back, we're not done yet
|
|
bStatus.forStack.push(forVarname);
|
|
let forLnum = bStatus.forLnums[forVarname]
|
|
return new JumpObj(forLnum[0], forLnum[1]+1, lnum, [forLnum[0], forLnum[1]+1]); // goto the statement RIGHT AFTER the FOR-declaration
|
|
}
|
|
else {
|
|
if (forVar instanceof ForGen)
|
|
bStatus.vars[forVarname].bvLiteral = forVar.current; // true BASIC compatibility for generator
|
|
else
|
|
bStatus.vars[forVarname] === undefined; // unregister the variable
|
|
|
|
return new JumpObj(lnum, stmtnum + 1, lnum, [lnum, stmtnum + 1]);
|
|
}
|
|
}
|
|
|
|
throw lang.syntaxfehler(lnum, "extra arguments for NEXT");
|
|
}},
|
|
/*
|
|
10 input;"what is your name";a$
|
|
|
|
£ Line 10 (function)
|
|
| leaves: 3
|
|
| value: input (type: string)
|
|
£ Line 0 (null)
|
|
| leaves: 0
|
|
| value: undefined (type: undefined)
|
|
`-----------------
|
|
| ;
|
|
| ¶ Line 10 (string)
|
|
| | leaves: 0
|
|
| | value: what is your name (type: string)
|
|
| `-----------------
|
|
| ;
|
|
| i Line 10 (literal)
|
|
| | leaves: 0
|
|
| | value: A$ (type: string)
|
|
| `-----------------
|
|
`-----------------
|
|
10 input "what is your name";a$
|
|
|
|
£ Line 10 (function)
|
|
| leaves: 2
|
|
| value: input (type: string)
|
|
| ¶ Line 10 (string)
|
|
| | leaves: 0
|
|
| | value: what is your name (type: string)
|
|
| `-----------------
|
|
| ;
|
|
| i Line 10 (literal)
|
|
| | leaves: 0
|
|
| | value: A$ (type: string)
|
|
| `-----------------
|
|
`-----------------
|
|
*/
|
|
"INPUT" : {f:function(lnum, stmtnum, args) {
|
|
if (args.length != 1) throw lang.syntaxfehler(lnum, args.length+lang.aG);
|
|
let troValue = args[0].troValue;
|
|
|
|
// print out prompt text
|
|
print("? "); var rh = sys.read().trim();
|
|
|
|
// if string we got can be cast to number, do it
|
|
// NOTE: empty string will be cast to 0, which corresponds to GW-BASIC
|
|
if (!isNaN(rh)) rh = rh*1
|
|
|
|
return bStatus.addAsBasicVar(lnum, troValue, rh);
|
|
}},
|
|
"CIN" : {f:function(lnum, stmtnum, args) {
|
|
return sys.read().trim();
|
|
}},
|
|
"END" : {f:function(lnum, stmtnum, args) {
|
|
serial.println("Program terminated in "+lnum);
|
|
return new JumpObj(Number.MAX_SAFE_INTEGER, Number.MAX_SAFE_INTEGER - 1, lnum, undefined); // GOTO far-far-away
|
|
}},
|
|
"SPC" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => " ".repeat(lh));
|
|
}},
|
|
"LEFT" : {f:function(lnum, stmtnum, args) {
|
|
return twoArg(lnum, stmtnum, args, (str, len) => str.substring(0, len));
|
|
}},
|
|
"MID" : {f:function(lnum, stmtnum, args) {
|
|
return threeArg(lnum, stmtnum, args, (str, start, len) => str.substring(start-INDEX_BASE, start-INDEX_BASE+len));
|
|
}},
|
|
"RIGHT" : {f:function(lnum, stmtnum, args) {
|
|
return twoArg(lnum, stmtnum, args, (str, len) => str.substring(str.length - len, str.length));
|
|
}},
|
|
"SGN" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => (it > 0) ? 1 : (it < 0) ? -1 : 0);
|
|
}},
|
|
"ABS" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.abs(it));
|
|
}},
|
|
"SIN" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.sin(it));
|
|
}},
|
|
"COS" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.cos(it));
|
|
}},
|
|
"TAN" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.tan(it));
|
|
}},
|
|
"EXP" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.exp(it));
|
|
}},
|
|
"ASN" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.asin(it));
|
|
}},
|
|
"ACO" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.acos(it));
|
|
}},
|
|
"ATN" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.atan(it));
|
|
}},
|
|
"SQR" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.sqrt(it));
|
|
}},
|
|
"CBR" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.cbrt(it));
|
|
}},
|
|
"SINH" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.sinh(it));
|
|
}},
|
|
"COSH" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.cosh(it));
|
|
}},
|
|
"TANH" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.tanh(it));
|
|
}},
|
|
"LOG" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (it) => Math.log(it));
|
|
}},
|
|
"RESTORE" : {f:function(lnum, stmtnum, args) {
|
|
DATA_CURSOR = 0;
|
|
}},
|
|
"READ" : {f:function(lnum, stmtnum, args) {
|
|
if (args.length != 1) throw lang.syntaxfehler(lnum, args.length+lang.aG);
|
|
let troValue = args[0].troValue;
|
|
|
|
let rh = DATA_CONSTS[DATA_CURSOR++];
|
|
if (rh === undefined) throw lang.outOfData(lnum);
|
|
|
|
return bStatus.addAsBasicVar(lnum, troValue, rh);
|
|
}},
|
|
"DGET" : {f:function(lnum, stmtnum, args) {
|
|
let r = DATA_CONSTS[DATA_CURSOR++];
|
|
if (r === undefined) throw lang.outOfData(lnum);
|
|
return r;
|
|
}},
|
|
"OPTIONBASE" : {f:function(lnum, stmtnum, args) {
|
|
return oneArgNum(lnum, stmtnum, args, (lh) => {
|
|
if (lh != 0 && lh != 1) throw lang.syntaxfehler(line);
|
|
INDEX_BASE = lh|0;
|
|
});
|
|
}},
|
|
"DATA" : {f:function(lnum, stmtnum, args) {
|
|
if (prescan) {
|
|
args.forEach(it => DATA_CONSTS.push(resolve(it)));
|
|
}
|
|
}},
|
|
/* Syopsis: MAP function, functor
|
|
*/
|
|
"MAP" : {f:function(lnum, stmtnum, args) {
|
|
return twoArg(lnum, stmtnum, args, (fn, functor) => {
|
|
// TODO test only works with DEFUN'd functions
|
|
if (fn.astLeaves === undefined) throw lang.badFunctionCallFormat("Only works with DEFUN'd functions yet");
|
|
if (functor.toArray === undefined && !Array.isArray(functor)) throw lang.syntaxfehler(lnum, functor);
|
|
// generator?
|
|
if (functor.toArray) functor = functor.toArray();
|
|
|
|
return functor.map(it => bStatus.getDefunThunk(lnum, stmtnum, fn)(lnum, stmtnum, [it]));
|
|
});
|
|
}},
|
|
/* Synopsis: FOLD function, init_value, functor
|
|
* a function must accept two arguments, of which first argument will be an accumulator
|
|
*/
|
|
"FOLD" : {f:function(lnum, stmtnum, args) {
|
|
return threeArg(lnum, stmtnum, args, (fn, init, functor) => {
|
|
// TODO test only works with DEFUN'd functions
|
|
if (fn.astLeaves === undefined) throw lang.badFunctionCallFormat("Only works with DEFUN'd functions yet");
|
|
if (functor.toArray === undefined && !Array.isArray(functor)) throw lang.syntaxfehler(lnum, functor);
|
|
// generator?
|
|
if (functor.toArray) functor = functor.toArray();
|
|
|
|
let akku = init;
|
|
functor.forEach(it => {
|
|
akku = bStatus.getDefunThunk(lnum, stmtnum, fn)(lnum, stmtnum, [akku, it]);
|
|
});
|
|
|
|
return akku;
|
|
});
|
|
}},
|
|
/* Syopsis: FILTER function, functor
|
|
*/
|
|
"FILTER" : {f:function(lnum, stmtnum, args) {
|
|
return twoArg(lnum, stmtnum, args, (fn, functor) => {
|
|
// TODO test only works with DEFUN'd functions
|
|
if (fn.astLeaves === undefined) throw lang.badFunctionCallFormat("Only works with DEFUN'd functions yet");
|
|
if (functor.toArray === undefined && !Array.isArray(functor)) throw lang.syntaxfehler(lnum, functor);
|
|
// generator?
|
|
if (functor.toArray) functor = functor.toArray();
|
|
|
|
return functor.filter(it => bStatus.getDefunThunk(lnum, stmtnum, fn)(lnum, stmtnum, [it]));
|
|
});
|
|
}},
|
|
/* GOTO and GOSUB won't work but that's probably the best...? */
|
|
"DO" : {f:function(lnum, stmtnum, args) {
|
|
return args[args.length - 1];
|
|
}},
|
|
"LABEL" : {f:function(lnum, stmtnum, args) {
|
|
if (prescan) {
|
|
let labelname = args[0].troValue;
|
|
if (labelname === undefined) throw lang.syntaxfehler(lnum, "empty LABEL");
|
|
gotoLabels[labelname] = lnum;
|
|
}
|
|
}},
|
|
"ON" : {f:function(lnum, stmtnum, args) {
|
|
//args: functionName (string), testvalue (SyntaxTreeReturnObj), arg0 (SyntaxTreeReturnObj), arg1 (SyntaxTreeReturnObj), ...
|
|
if (args[2] === undefined) throw lang.syntaxfehler(lnum);
|
|
|
|
let jmpFun = args.shift();
|
|
let testvalue = resolve(args.shift())-INDEX_BASE;
|
|
|
|
// args must be resolved lazily because jump label is not resolvable
|
|
let jmpTarget = args[testvalue];
|
|
|
|
if (jmpFun !== "GOTO" && jmpFun !== "GOSUB")
|
|
throw lang.badFunctionCallFormat(`Not a jump statement: ${jmpFun}`)
|
|
|
|
if (jmpTarget === undefined)
|
|
return undefined;
|
|
|
|
return bStatus.builtin[jmpFun].f(lnum, stmtnum, [jmpTarget]);
|
|
}},
|
|
"MIN" : {f:function(lnum, stmtnum, args) {
|
|
return twoArg(lnum, stmtnum, args, (lh,rh) => (lh > rh) ? rh : lh);
|
|
}},
|
|
"MAX" : {f:function(lnum, stmtnum, args) {
|
|
return twoArg(lnum, stmtnum, args, (lh,rh) => (lh < rh) ? rh : lh);
|
|
}},
|
|
"GETKEYSDOWN" : {f:function(lnum, stmtnum, args) {
|
|
let keys = [];
|
|
sys.poke(-40, 255);
|
|
for (let k = -41; k >= -48; k--) {
|
|
keys.push(sys.peek(k));
|
|
}
|
|
return keys;
|
|
}},
|
|
"~<" : {f:function(lnum, stmtnum, args) { // CURRY operator
|
|
return twoArg(lnum, stmtnum, args, (fn, value) => {
|
|
// TODO test only works with DEFUN'd functions
|
|
if (fn.astLeaves === undefined) throw lang.badFunctionCallFormat("Only works with DEFUN'd functions yet");
|
|
|
|
if (DBGON) {
|
|
serial.println("[BASIC.BUILTIN.CURRY] currying this function tree...");
|
|
serial.println(astToString(fn));
|
|
serial.println("[BASIC.BUILTIN.CURRY] with this value: "+value);
|
|
serial.println(Object.entries(value));
|
|
}
|
|
|
|
let curriedTree = curryDefun(fn, value);
|
|
|
|
if (DBGON) {
|
|
serial.println("[BASIC.BUILTIN.CURRY] Here's your curried tree:");
|
|
serial.println(astToString(curriedTree));
|
|
}
|
|
|
|
return curriedTree;
|
|
});
|
|
}},
|
|
"TYPEOF" : {f:function(lnum, stmtnum, args) {
|
|
return oneArg(lnum, stmtnum, args, bv => {
|
|
if (bv.Type === undefined || !(bv instanceof BasicVar))
|
|
return JStoBASICtype(bv);
|
|
return bv.bvType;
|
|
});
|
|
}},
|
|
"LEN" : {f:function(lnum, stmtnum, args) {
|
|
return oneArg(lnum, stmtnum, args, lh => {
|
|
if (lh.length === undefined) throw lang.illegalType();
|
|
return lh.length;
|
|
});
|
|
}},
|
|
"HEAD" : {f:function(lnum, stmtnum, args) {
|
|
return oneArg(lnum, stmtnum, args, lh => {
|
|
if (lh.length === undefined || lh.length < 1) throw lang.illegalType();
|
|
return lh[0];
|
|
});
|
|
}},
|
|
"TAIL" : {f:function(lnum, stmtnum, args) {
|
|
return oneArg(lnum, stmtnum, args, lh => {
|
|
if (lh.length === undefined || lh.length < 1) throw lang.illegalType();
|
|
return lh.slice(1, lh.length);
|
|
});
|
|
}},
|
|
"INIT" : {f:function(lnum, stmtnum, args) {
|
|
return oneArg(lnum, stmtnum, args, lh => {
|
|
if (lh.length === undefined || lh.length < 1) throw lang.illegalType();
|
|
return lh.slice(0, lh.length - 1);
|
|
});
|
|
}},
|
|
"LAST" : {f:function(lnum, stmtnum, args) {
|
|
return oneArg(lnum, stmtnum, args, lh => {
|
|
if (lh.length === undefined || lh.length < 1) throw lang.illegalType();
|
|
return lh[lh.length - 1];
|
|
});
|
|
}},
|
|
"OPTIONDEBUG" : {f:function(lnum, stmtnum, args) {
|
|
oneArgNum(lnum, stmtnum, args, (lh) => {
|
|
if (lh != 0 && lh != 1) throw lang.syntaxfehler(line);
|
|
DBGON = (1 == lh|0);
|
|
});
|
|
}},
|
|
"OPTIONTRACE" : {f:function(lnum, stmtnum, args) {
|
|
oneArgNum(lnum, stmtnum, args, (lh) => {
|
|
if (lh != 0 && lh != 1) throw lang.syntaxfehler(line);
|
|
TRACEON = (1 == lh|0);
|
|
});
|
|
}},
|
|
"RESOLVE" : {f:function(lnum, stmtnum, args) {
|
|
if (DBGON) {
|
|
return oneArg(lnum, stmtnum, args, (it) => {
|
|
println(it);
|
|
});
|
|
}
|
|
else {
|
|
throw lang.syntaxfehler(lnum);
|
|
}
|
|
}},
|
|
"RESOLVEVAR" : {f:function(lnum, stmtnum, args) {
|
|
if (DBGON) {
|
|
return oneArg(lnum, stmtnum, args, (it) => {
|
|
let v = bStatus.vars[args[0].troValue];
|
|
if (v === undefined) println("Undefined variable: "+args[0].troValue);
|
|
else println(`type: ${v.bvType}, value: ${v.bvLiteral}`);
|
|
});
|
|
}
|
|
else {
|
|
throw lang.syntaxfehler(lnum);
|
|
}
|
|
}},
|
|
"UNRESOLVE" : {f:function(lnum, stmtnum, args) {
|
|
if (DBGON) {
|
|
println(args[0]);
|
|
}
|
|
else {
|
|
throw lang.syntaxfehler(lnum);
|
|
}
|
|
}},
|
|
"UNRESOLVE0" : {f:function(lnum, stmtnum, args) {
|
|
if (DBGON) {
|
|
println(Object.entries(args[0]));
|
|
}
|
|
else {
|
|
throw lang.syntaxfehler(lnum);
|
|
}
|
|
}}
|
|
};
|
|
Object.freeze(bStatus.builtin);
|
|
let bF = {};
|
|
bF._1os = {"!":1,"~":1,"#":1,"<":1,"=":1,">":1,"*":1,"+":1,"-":1,"/":1,"^":1,":":1,"$":1};
|
|
bF._2os = {"<":1,"=":1,">":1,"~":1,"$":1,"*":1};
|
|
bF._uos = {"+":1,"-":1,"NOT":1,"BNOT":1};
|
|
bF._isNum = function(code) {
|
|
return (code >= 0x30 && code <= 0x39) || code == 0x5F;
|
|
};
|
|
bF._isNum2 = function(code) {
|
|
return (code >= 0x30 && code <= 0x39) || code == 0x5F || (code >= 0x41 && code <= 0x46) || (code >= 0x61 && code <= 0x66);
|
|
};
|
|
bF._isNumSep = function(code) {
|
|
return code == 0x2E || code == 0x42 || code == 0x58 || code == 0x62 || code == 0x78;
|
|
};
|
|
bF._is1o = function(code) {
|
|
return bF._1os[String.fromCharCode(code)]
|
|
};
|
|
bF._is2o = function(code) {
|
|
return bF._2os[String.fromCharCode(code)]
|
|
};
|
|
bF._isUnary = function(code) {
|
|
return bF._uos[String.fromCharCode(code)]
|
|
}
|
|
bF._isParenOpen = function(code) {
|
|
return (code == 0x28 || code == 0x5B);
|
|
};
|
|
bF._isParenClose = function(code) {
|
|
return (code == 0x29 || code == 0x5D);
|
|
};
|
|
bF._isParen = function(code) {
|
|
return bF._isParenOpen(code) || bF._isParenClose(code);
|
|
};
|
|
bF._isSep = function(code) {
|
|
return code == 0x2C || code == 0x3B;
|
|
};
|
|
// define operator precedence here...
|
|
bF._opPrc = {
|
|
// function call in itself has highest precedence
|
|
"^":1,
|
|
"*":2,"/":2,"\\":2,
|
|
"MOD":3,
|
|
"+":4,"-":4,
|
|
"NOT":5,"BNOT":5,
|
|
"<<":6,">>":6,
|
|
"<":7,">":7,"<=":7,"=<":7,">=":7,"=>":7,
|
|
"==":8,"<>":8,"><":8,
|
|
"MIN":10,"MAX":10,
|
|
"BAND":20,
|
|
"BXOR":21,
|
|
"BOR":22,
|
|
"AND":30,
|
|
"OR":31,
|
|
"TO":40,
|
|
"STEP":41,
|
|
"!":50,"~":51, // array CONS and PUSH
|
|
"#": 52, // array concat
|
|
"~<": 100, // curry operator
|
|
"~>": 101, // closure operator
|
|
"=":999,
|
|
"IN":1000
|
|
};
|
|
bF._opRh = {"^":1,"=":1,"!":1,"IN":1,"~>":1}; // ~< and ~> cannot have same associativity
|
|
// these names appear on executeSyntaxTree as "exceptional terms" on parsing (regular function calls are not "exceptional terms")
|
|
bF._tokenise = function(lnum, cmd) {
|
|
var _debugprintStateTransition = false;
|
|
var k;
|
|
var tokens = [];
|
|
var states = [];
|
|
var sb = "";
|
|
var mode = "lit"; // lit, qot, paren, sep, op, num; operator2, numbersep, number2, limbo, escape, quote_end
|
|
|
|
// NOTE: malformed numbers (e.g. "_b3", "_", "__") must be re-marked as literal or syntax error in the second pass
|
|
|
|
if (_debugprintStateTransition) println("@@ TOKENISE @@");
|
|
if (_debugprintStateTransition) println("Ln "+lnum+" cmd "+cmd);
|
|
|
|
// TOKENISE
|
|
for (k = 0; k < cmd.length; k++) {
|
|
var char = cmd[k];
|
|
var charCode = cmd.charCodeAt(k);
|
|
|
|
if (_debugprintStateTransition) print("Char: "+char+"("+charCode+"), state: "+mode);
|
|
|
|
if ("lit" == mode) {
|
|
if (0x22 == charCode) { // "
|
|
tokens.push(sb); sb = ""; states.push(mode);
|
|
mode = "qot";
|
|
}
|
|
else if (bF._isParen(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "paren";
|
|
}
|
|
else if (" " == char) {
|
|
tokens.push(sb); sb = ""; states.push(mode);
|
|
mode = "limbo";
|
|
}
|
|
else if (bF._isSep(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "sep";
|
|
}
|
|
/*else if (bF._isNum(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "num";
|
|
}*/
|
|
else if (bF._is1o(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "op";
|
|
}
|
|
else {
|
|
sb += char;
|
|
}
|
|
}
|
|
else if ("num" == mode) {
|
|
if (bF._isNum(charCode)) {
|
|
sb += char;
|
|
}
|
|
else if (bF._isNumSep(charCode)) {
|
|
sb += char;
|
|
mode = "nsep";
|
|
}
|
|
else if (0x22 == charCode) {
|
|
tokens.push(sb); sb = ""; states.push(mode);
|
|
mode = "qot";
|
|
}
|
|
else if (" " == char) {
|
|
tokens.push(sb); sb = ""; states.push(mode);
|
|
mode = "limbo";
|
|
}
|
|
else if (bF._isParen(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "paren"
|
|
}
|
|
else if (bF._isSep(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "sep";
|
|
}
|
|
else if (bF._is1o(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "op";
|
|
}
|
|
else {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "lit";
|
|
}
|
|
}
|
|
else if ("nsep" == mode) {
|
|
if (bF._isNum2(charCode)) {
|
|
sb += char;
|
|
mode = "n2";
|
|
}
|
|
else {
|
|
throw lang.syntaxfehler(lnum, lang.badNumberFormat);
|
|
}
|
|
}
|
|
else if ("n2" == mode) {
|
|
if (bF._isNum2(charCode)) {
|
|
sb += char;
|
|
}
|
|
else if (0x22 == charCode) {
|
|
tokens.push(sb); sb = ""; states.push("num");
|
|
mode = "qot";
|
|
}
|
|
else if (" " == char) {
|
|
tokens.push(sb); sb = ""; states.push("num");
|
|
mode = "limbo";
|
|
}
|
|
else if (bF._isParen(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push("num");
|
|
mode = "paren"
|
|
}
|
|
else if (bF._isSep(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push("num");
|
|
mode = "sep";
|
|
}
|
|
else if (bF._is1o(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push("num");
|
|
mode = "op";
|
|
}
|
|
else {
|
|
tokens.push(sb); sb = "" + char; states.push("num");
|
|
mode = "lit";
|
|
}
|
|
}
|
|
else if ("op" == mode) {
|
|
if (bF._is2o(charCode)) {
|
|
sb += char;
|
|
mode = "o2";
|
|
}
|
|
else if (bF._isUnary(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
}
|
|
else if (bF._is1o(charCode)) {
|
|
throw lang.syntaxfehler(lnum, lang.badOperatorFormat);
|
|
}
|
|
else if (bF._isNum(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "num";
|
|
}
|
|
else if (0x22 == charCode) {
|
|
tokens.push(sb); sb = ""; states.push(mode);
|
|
mode = "qot";
|
|
}
|
|
else if (" " == char) {
|
|
tokens.push(sb); sb = ""; states.push(mode);
|
|
mode = "limbo";
|
|
}
|
|
else if (bF._isParen(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "paren"
|
|
}
|
|
else if (bF._isSep(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "sep";
|
|
}
|
|
else {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "lit";
|
|
}
|
|
}
|
|
else if ("o2" == mode) {
|
|
if (bF._is1o(charCode)) {
|
|
throw lang.syntaxfehler(lnum, lang.badOperatorFormat);
|
|
}
|
|
else if (bF._isNum(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push("op");
|
|
mode = "num";
|
|
}
|
|
else if (0x22 == charCode) {
|
|
tokens.push(sb); sb = ""; states.push("op");
|
|
mode = "qot";
|
|
}
|
|
else if (" " == char) {
|
|
tokens.push(sb); sb = ""; states.push("op");
|
|
mode = "limbo";
|
|
}
|
|
else if (bF._isParen(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push("op");
|
|
mode = "paren"
|
|
}
|
|
else if (bF._isSep(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push("op");
|
|
mode = "sep";
|
|
}
|
|
else {
|
|
tokens.push(sb); sb = "" + char; states.push("op");
|
|
mode = "lit";
|
|
}
|
|
}
|
|
else if ("qot" == mode) {
|
|
if (0x22 == charCode) {
|
|
tokens.push(sb); sb = ""; states.push(mode);
|
|
mode = "quote_end";
|
|
}
|
|
/*else if (charCode == 0x5C) { // reverse solidus
|
|
tokens.push(sb); sb = "";
|
|
mode = "escape";
|
|
}*/
|
|
else {
|
|
sb += char;
|
|
}
|
|
}
|
|
/*else if ("escape" == mode) {
|
|
if (0x5C == charCode) // reverse solidus
|
|
sb += String.fromCharCode(0x5C);
|
|
else if ("n" == char)
|
|
sb += String.fromCharCode(0x0A);
|
|
else if ("t" == char)
|
|
sb += String.fromCharCode(0x09);
|
|
else if (0x22 == charCode) // "
|
|
sb += String.fromCharCode(0x22);
|
|
else if (0x27 == charCode)
|
|
sb += String.fromCharCode(0x27);
|
|
else if ("e" == char)
|
|
sb += String.fromCharCode(0x1B);
|
|
else if ("a" == char)
|
|
sb += String.fromCharCode(0x07);
|
|
else if ("b" == char)
|
|
sb += String.fromCharCode(0x08);
|
|
mode = "qot"; // ESCAPE is only legal when used inside of quote
|
|
}*/
|
|
else if ("quote_end" == mode) {
|
|
if (" " == char) {
|
|
sb = "";
|
|
mode = "limbo";
|
|
}
|
|
else if (0x22 == charCode) {
|
|
sb = "" + char;
|
|
mode = "qot";
|
|
}
|
|
else if (bF._isParen(charCode)) {
|
|
sb = "" + char;
|
|
mode = "paren";
|
|
}
|
|
else if (bF._isSep(charCode)) {
|
|
sb = "" + char;
|
|
mode = "sep";
|
|
}
|
|
else if (bF._isNum(charCode)) {
|
|
sb = "" + char;
|
|
mode = "num";
|
|
}
|
|
else if (bF._is1o(charCode)) {
|
|
sb = "" + char;
|
|
mode = "op"
|
|
}
|
|
else {
|
|
sb = "" + char;
|
|
mode = "lit";
|
|
}
|
|
}
|
|
else if ("limbo" == mode) {
|
|
if (char == " ") {
|
|
/* do nothing */
|
|
}
|
|
else if (0x22 == charCode) {
|
|
mode = "qot"
|
|
}
|
|
else if (bF._isParen(charCode)) {
|
|
sb = "" + char;
|
|
mode = "paren";
|
|
}
|
|
else if (bF._isSep(charCode)) {
|
|
sb = "" + char;
|
|
mode = "sep";
|
|
}
|
|
else if (bF._isNum(charCode)) {
|
|
sb = "" + char;
|
|
mode = "num";
|
|
}
|
|
else if (bF._is1o(charCode)) {
|
|
sb = "" + char;
|
|
mode = "op"
|
|
}
|
|
else {
|
|
sb = "" + char;
|
|
mode = "lit";
|
|
}
|
|
}
|
|
else if ("paren" == mode) {
|
|
if (char == " ") {
|
|
tokens.push(sb); sb = ""; states.push(mode);
|
|
mode = "limbo";
|
|
}
|
|
else if (0x22 == charCode) {
|
|
tokens.push(sb); sb = ""; states.push(mode);
|
|
mode = "qot"
|
|
}
|
|
else if (bF._isParen(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "paren";
|
|
}
|
|
else if (bF._isSep(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "sep";
|
|
}
|
|
else if (bF._isNum(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "num";
|
|
}
|
|
else if (bF._is1o(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "op"
|
|
}
|
|
else {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "lit";
|
|
}
|
|
}
|
|
else if ("sep" == mode) {
|
|
if (char == " ") {
|
|
tokens.push(sb); sb = ""; states.push(mode);
|
|
mode = "limbo";
|
|
}
|
|
else if (0x22 == charCode) {
|
|
tokens.push(sb); sb = ""; states.push(mode);
|
|
mode = "qot"
|
|
}
|
|
else if (bF._isParen(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "paren";
|
|
}
|
|
else if (bF._isSep(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "sep";
|
|
}
|
|
else if (bF._isNum(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "num";
|
|
}
|
|
else if (bF._is1o(charCode)) {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "op"
|
|
}
|
|
else {
|
|
tokens.push(sb); sb = "" + char; states.push(mode);
|
|
mode = "lit";
|
|
}
|
|
}
|
|
else {
|
|
throw Error("Unknown parser state: " + mode);
|
|
}
|
|
|
|
if (_debugprintStateTransition) println("->"+mode);
|
|
}
|
|
|
|
if (sb.length > 0) {
|
|
tokens.push(sb); states.push(mode);
|
|
}
|
|
|
|
// filter off initial empty token if the statement does NOT start with literal (e.g. "-3+5")
|
|
if (tokens[0].length == 0) {
|
|
tokens = tokens.slice(1, tokens.length);
|
|
states = states.slice(1, states.length);
|
|
}
|
|
// clean up operator2 and number2
|
|
for (k = 0; k < states.length; k++) {
|
|
if (states[k] == "o2") states[k] = "op";
|
|
else if (states[k] == "n2" || states[k] == "nsep") states[k] = "num";
|
|
}
|
|
|
|
if (tokens.length != states.length) {
|
|
throw new InternalError("size of tokens and states does not match (line: "+lnum+")\n"+
|
|
tokens+"\n"+states);
|
|
}
|
|
|
|
return { "tokens": tokens, "states": states };
|
|
};
|
|
bF._parserElaboration = function(lnum, tokens, states) {
|
|
var _debugprintElaboration = false;
|
|
if (_debugprintElaboration) println("@@ ELABORATION @@");
|
|
var k = 0;
|
|
|
|
// NOTE: malformed numbers (e.g. "_b3", "_", "__") must be re-marked as literal or syntax error
|
|
|
|
while (k < states.length) { // using while loop because array size will change during the execution
|
|
if (states[k] == "num" && !reNumber.test(tokens[k]))
|
|
states[k] = "lit";
|
|
else if (states[k] == "lit" && bF._opPrc[tokens[k].toUpperCase()] !== undefined)
|
|
states[k] = "op";
|
|
else if (tokens[k].toUpperCase() == "TRUE" || tokens[k].toUpperCase() == "FALSE")
|
|
states[k] = "bool";
|
|
else if (tokens[k] == ":" && states[k] == "op")
|
|
states[k] = "seq";
|
|
|
|
// decimalise hex/bin numbers (because Nashorn does not support binary literal)
|
|
if (states[k] == "num") {
|
|
if (tokens[k].toUpperCase().startsWith("0B")) {
|
|
tokens[k] = parseInt(tokens[k].substring(2, tokens[k].length), 2) + "";
|
|
}
|
|
}
|
|
|
|
|
|
k += 1;
|
|
}
|
|
};
|
|
bF._recurseApplyAST = function(tree, action) {
|
|
if (tree.astLeaves === undefined || tree.astLeaves[0] === undefined)
|
|
return action(tree);
|
|
else {
|
|
action(tree);
|
|
tree.astLeaves.forEach(it => bF._recurseApplyAST(it, action))
|
|
}
|
|
}
|
|
/** EBNF notation:
|
|
(* quick reference to EBNF *)
|
|
(* { word } = word is repeated 0 or more times *)
|
|
(* [ word ] = word is optional (repeated 0 or 1 times) *)
|
|
|
|
line =
|
|
linenumber , stmt , {":" , stmt}
|
|
| linenumber , "REM" , ? basically anything ? ;
|
|
linenumber = digits ;
|
|
|
|
stmt =
|
|
"REM" , ? anything ?
|
|
| "IF" , expr_sans_asgn , "THEN" , stmt , ["ELSE" , stmt]
|
|
| "DEFUN" , [ident] , "(" , [ident , {" , " , ident}] , ")" , "=" , expr
|
|
| "ON" , expr_sans_asgn , ("GOTO" | "GOSUB") , expr_sans_asgn , {"," , expr_sans_asgn}
|
|
| "(" , stmt , ")"
|
|
| expr ; (* if the statement is 'lit' and contains only one word, treat it as function_call
|
|
e.g. NEXT for FOR loop *)
|
|
|
|
expr = (* this basically blocks some funny attemps such as using DEFUN as anon function
|
|
because everything is global in BASIC *)
|
|
lit
|
|
| "(" , expr , ")"
|
|
| "IF" , expr_sans_asgn , "THEN" , expr , ["ELSE" , expr]
|
|
| kywd , expr - "(" (* also deals with FOR statement *)
|
|
(* at this point, if OP is found in paren-level 0, skip function_call *)
|
|
| function_call
|
|
| expr , op , expr
|
|
| op_uni , expr ;
|
|
|
|
expr_sans_asgn = ? identical to expr except errors out whenever "=" is found ? ;
|
|
|
|
function_call =
|
|
ident , "(" , [expr , {argsep , expr} , [argsep]] , ")"
|
|
| ident , expr , {argsep , expr} , [argsep] ;
|
|
kywd = ? words that exists on the list of predefined function that are not operators ? ;
|
|
|
|
(* don't bother looking at these, because you already know the stuff *)
|
|
|
|
argsep = "," | ";" ;
|
|
ident = alph , [digits] ; (* variable and function names *)
|
|
lit = alph , [digits] | num | string ; (* ident + numbers and string literals *)
|
|
op = "^" | "*" | "/" | "MOD" | "+" | "-" | "<<" | ">>" | "<" | ">" | "<="
|
|
| "=<" | ">=" | "=>" | "==" | "<>" | "><" | "BAND" | "BXOR" | "BOR"
|
|
| "AND" | "OR" | "TO" | "STEP" | "!" | "~" | "#" | "=" ;
|
|
op_uni = "-" | "+" ;
|
|
|
|
alph = letter | letter , alph ;
|
|
digits = digit | digit , digits ;
|
|
hexdigits = hexdigit | hexdigit , hexdigits ;
|
|
bindigits = bindigit | bindigit , bindigits ;
|
|
num = digits | digits , "." , [digits] | "." , digits
|
|
| ("0x"|"0X") , hexdigits
|
|
| ("0b"|"0B") , bindigits ; (* sorry, no e-notation! *)
|
|
visible = ? ASCII 0x20 to 0x7E ? ;
|
|
string = '"' , (visible | visible , stringlit) , '"' ;
|
|
|
|
letter = "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" | "J" | "K" | "L" | "M" | "N"
|
|
| "O" | "P" | "Q" | "R" | "S" | "T" | "U" | "V" | "W" | "X" | "Y" | "Z" | "a" | "b"
|
|
| "c" | "d" | "e" | "f" | "g" | "h" | "i" | "j" | "k" | "l" | "m" | "n" | "o" | "p"
|
|
| "q" | "r" | "s" | "t" | "u" | "v" | "w" | "x" | "y" | "z" | "_" ;
|
|
digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ;
|
|
hexdigit = "A" | "B" | "C" | "D" | "E" | "F" | "a" | "b" | "c" | "d" | "e" | "f" | "0" | "1"
|
|
| "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ;
|
|
bindigit = "0" | "1" ;
|
|
|
|
(* all possible token states: lit num op bool qot paren sep *)
|
|
(* below are schematic of trees generated after parsing the statements *)
|
|
|
|
IF (type: function, value: IF)
|
|
1. cond
|
|
2. true
|
|
[3. false]
|
|
|
|
FOR (type: function, value: FOR)
|
|
1. expr (normally (=) but not necessarily)
|
|
|
|
DEFUN (type: function, value: DEFUN)
|
|
1. funcname
|
|
1. arg0
|
|
[2. arg1]
|
|
[3. argN...]
|
|
2. stmt
|
|
|
|
ON (type: function, value: ON)
|
|
1. testvalue
|
|
2. functionname (type: lit)
|
|
3. arg0
|
|
[4. arg1]
|
|
[5. argN...]
|
|
|
|
FUNCTION_CALL (type: function, value: PRINT or something)
|
|
1. arg0
|
|
2. arg1
|
|
[3. argN...]
|
|
*/
|
|
// @returns BasicAST
|
|
bF._EquationIllegalTokens = ["IF","THEN","ELSE","DEFUN","ON"];
|
|
bF.isSemanticLiteral = function(token, state) {
|
|
return undefined == token || "]" == token || ")" == token ||
|
|
"qot" == state || "num" == state || "bool" == state || "lit" == state;
|
|
}
|
|
bF.parserDoDebugPrint = (!PROD) && true;
|
|
bF.parserPrintdbg = any => { if (bF.parserDoDebugPrint) serial.println(any) };
|
|
bF.parserPrintdbg2 = function(icon, lnum, tokens, states, recDepth) {
|
|
if (bF.parserDoDebugPrint) {
|
|
let treeHead = String.fromCharCode(0x2502,32).repeat(recDepth);
|
|
bF.parserPrintdbg(`${icon}${lnum} ${treeHead}${tokens.join(' ')}`);
|
|
bF.parserPrintdbg(`${icon}${lnum} ${treeHead}${states.join(' ')}`);
|
|
}
|
|
}
|
|
bF.parserPrintdbgline = function(icon, msg, lnum, recDepth) {
|
|
if (bF.parserDoDebugPrint) {
|
|
let treeHead = String.fromCharCode(0x2502,32).repeat(recDepth);
|
|
bF.parserPrintdbg(`${icon}${lnum} ${treeHead}${msg}`);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return ARRAY of BasicAST
|
|
*/
|
|
bF._parseTokens = function(lnum, tokens, states) {
|
|
bF.parserPrintdbg2('Line ', lnum, tokens, states, 0);
|
|
|
|
if (tokens.length !== states.length) throw lang.syntaxfehler(lnum);
|
|
if (tokens[0] == "REM" && states[0] != "qot") return;
|
|
|
|
/*************************************************************************/
|
|
|
|
let parenDepth = 0;
|
|
let parenStart = -1;
|
|
let parenEnd = -1;
|
|
let seps = [];
|
|
|
|
// scan for parens and (:)s
|
|
for (let k = 0; k < tokens.length; k++) {
|
|
// increase paren depth and mark paren start position
|
|
if (tokens[k] == "(" && states[k] != "qot") {
|
|
parenDepth += 1;
|
|
if (parenStart == -1 && parenDepth == 1) parenStart = k;
|
|
}
|
|
// decrease paren depth
|
|
else if (tokens[k] == ")" && states[k] != "qot") {
|
|
if (parenEnd == -1 && parenDepth == 1) parenEnd = k;
|
|
parenDepth -= 1;
|
|
}
|
|
|
|
if (parenDepth == 0 && tokens[k] == ":" && states[k] == "seq")
|
|
seps.push(k);
|
|
}
|
|
|
|
let startPos = [0].concat(seps.map(k => k+1));
|
|
let stmtPos = startPos.map((s,i) => {return{start:s, end:(seps[i] || tokens.length)}}); // use end of token position as separator position
|
|
|
|
return stmtPos.map((x,i) => {
|
|
if (stmtPos.length > 1)
|
|
bF.parserPrintdbgline('Line ', 'Statement #'+(i+1), lnum, 0);
|
|
|
|
// check for empty tokens
|
|
if (x.end - x.start <= 0) throw new ParserError("Malformed Line");
|
|
|
|
let tree = bF._parseStmt(lnum,
|
|
tokens.slice(x.start, x.end),
|
|
states.slice(x.start, x.end),
|
|
1
|
|
);
|
|
|
|
bF.parserPrintdbgline('Tree in ', '\n'+astToString(tree), lnum, 0);
|
|
|
|
return tree;
|
|
});
|
|
}
|
|
|
|
|
|
/** Parses following EBNF rule:
|
|
stmt =
|
|
"IF" , expr_sans_asgn , "THEN" , stmt , ["ELSE" , stmt]
|
|
| "DEFUN" , [ident] , "(" , [ident , {" , " , ident}] , ")" , "=" , expr
|
|
| "ON" , expr_sans_asgn , ident , expr_sans_asgn , {"," , expr_sans_asgn}
|
|
| "(" , stmt , ")"
|
|
| expr ; (* if the statement is 'lit' and contains only one word, treat it as function_call e.g. NEXT for FOR loop *)
|
|
* @return: BasicAST
|
|
*/
|
|
bF._parseStmt = function(lnum, tokens, states, recDepth) {
|
|
bF.parserPrintdbg2('$', lnum, tokens, states, recDepth);
|
|
|
|
/*************************************************************************/
|
|
|
|
// case for: single word (e.g. NEXT for FOR loop)
|
|
if (tokens.length == 1 && states.length == 1) {
|
|
bF.parserPrintdbgline('$', "Single Word Function Call", lnum, recDepth);
|
|
return bF._parseLit(lnum, tokens, states, recDepth + 1, true);
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
let headTkn = tokens[0].toUpperCase();
|
|
let headSta = states[0];
|
|
|
|
let treeHead = new BasicAST();
|
|
treeHead.astLnum = lnum;
|
|
|
|
/*************************************************************************/
|
|
|
|
// case for: "REM" , ? anything ?
|
|
if (headTkn == "REM" && headSta != "qot") return;
|
|
|
|
/*************************************************************************/
|
|
|
|
let parenDepth = 0;
|
|
let parenStart = -1;
|
|
let parenEnd = -1;
|
|
let onGoPos = -1;
|
|
let sepsZero = [];
|
|
let sepsOne = [];
|
|
|
|
// scan for parens that will be used for several rules
|
|
// also find nearest THEN and ELSE but also take parens into account
|
|
for (let k = 0; k < tokens.length; k++) {
|
|
// increase paren depth and mark paren start position
|
|
if (tokens[k] == "(" && states[k] != "qot") {
|
|
parenDepth += 1;
|
|
if (parenStart == -1 && parenDepth == 1) parenStart = k;
|
|
}
|
|
// decrease paren depth
|
|
else if (tokens[k] == ")" && states[k] != "qot") {
|
|
if (parenEnd == -1 && parenDepth == 1) parenEnd = k;
|
|
parenDepth -= 1;
|
|
}
|
|
|
|
if (parenDepth == 0 && states[k] == "sep")
|
|
sepsZero.push(k);
|
|
if (parenDepth == 1 && states[k] == "sep")
|
|
sepsOne.push(k);
|
|
|
|
if (parenDepth == 0) {
|
|
let tok = tokens[k].toUpperCase();
|
|
if (-1 == onGoPos && ("GOTO" == tok || "GOSUB" == tok) && "lit" == states[k])
|
|
onGoPos = k;
|
|
}
|
|
}
|
|
|
|
// unmatched brackets, duh!
|
|
if (parenDepth != 0) throw lang.syntaxfehler(lnum, lang.unmatchedBrackets);
|
|
|
|
/*************************************************************************/
|
|
|
|
// ## case for:
|
|
// "IF" , expr_sans_asgn , "THEN" , stmt , ["ELSE" , stmt]
|
|
try {
|
|
bF.parserPrintdbgline('$', "Trying IF Statement...", lnum, recDepth);
|
|
return bF._parseIfMode(lnum, tokens, states, recDepth + 1, false);
|
|
}
|
|
// if ParserError is raised, continue to apply other rules
|
|
catch (e) {
|
|
bF.parserPrintdbgline('$', 'It was NOT!', lnum, recDepth);
|
|
if (!(e instanceof ParserError)) throw e;
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
// ## case for:
|
|
// | "DEFUN" , [ident] , "(" , [ident , {" , " , ident}] , ")" , "=" , expr
|
|
if ("DEFUN" == headTkn && "lit" == headSta &&
|
|
parenStart == 2 && tokens[parenEnd + 1] == "=" && states[parenEnd + 1] == "op"
|
|
) {
|
|
bF.parserPrintdbgline('$', 'DEFUN Stmt', lnum, recDepth);
|
|
|
|
treeHead.astValue = "DEFUN";
|
|
treeHead.astType = "function";
|
|
|
|
// parse function name
|
|
if (tokens[1] == "(") {
|
|
// anonymous function
|
|
treeHead.astLeaves[0] = new BasicAST();
|
|
treeHead.astLeaves[0].astLnum = lnum;
|
|
treeHead.astLeaves[0].astType = "lit";
|
|
}
|
|
else {
|
|
bF.parserPrintdbgline('$', 'DEFUN Stmt Function Name:', lnum, recDepth);
|
|
treeHead.astLeaves[0] = bF._parseIdent(lnum, [tokens[1]], [states[1]], recDepth + 1);
|
|
}
|
|
|
|
// parse function arguments
|
|
bF.parserPrintdbgline('$', 'DEFUN Stmt Function Arguments -- ', lnum, recDepth);
|
|
let defunArgDeclSeps = sepsOne.filter((i) => i < parenEnd + 1).map(i => i-1).concat([parenEnd - 1]);
|
|
bF.parserPrintdbgline('$', 'DEFUN Stmt Function Arguments comma position: '+defunArgDeclSeps, lnum, recDepth);
|
|
|
|
treeHead.astLeaves[0].astLeaves = defunArgDeclSeps.map(i=>bF._parseIdent(lnum, [tokens[i]], [states[i]], recDepth + 1));
|
|
|
|
// parse function body
|
|
let parseFunction = (DEFUNS_BUILD_DEFUNS) ? bF._parseStmt : bF._parseExpr;
|
|
treeHead.astLeaves[1] = parseFunction(lnum,
|
|
tokens.slice(parenEnd + 2, tokens.length),
|
|
states.slice(parenEnd + 2, states.length),
|
|
recDepth + 1
|
|
);
|
|
|
|
return treeHead;
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
// ## case for:
|
|
// | "ON" , if_equation , ident , if_equation , {"," , if_equation}
|
|
if ("ON" == headTkn && "lit" == headSta) {
|
|
bF.parserPrintdbgline('$', 'ON Stmt', lnum, recDepth);
|
|
|
|
if (onGoPos == -1) throw ParserError("Malformed ON Statement");
|
|
|
|
treeHead.astValue = "ON";
|
|
treeHead.astType = "function";
|
|
|
|
// parse testvalue
|
|
let testvalue = bF._parseExpr(lnum,
|
|
tokens.slice(1, onGoPos),
|
|
states.slice(1, onGoPos),
|
|
recDepth + 1,
|
|
true
|
|
);
|
|
|
|
// parse functionname
|
|
let functionname = bF._parseExpr(lnum,
|
|
[tokens[onGoPos]],
|
|
[states[onGoPos]],
|
|
recDepth + 1,
|
|
true
|
|
);
|
|
|
|
// parse arguments
|
|
// get list of comma but filter ones appear before GOTO/GOSUB
|
|
let onArgSeps = sepsZero.filter(i => (i > onGoPos));
|
|
let onArgStartPos = [onGoPos + 1].concat(onArgSeps.map(k => k + 1));
|
|
let onArgPos = onArgStartPos.map((s,i) => {return{start:s, end: (onArgSeps[i] || tokens.length)}}); // use end of token position as separator position
|
|
|
|
// recursively parse expressions
|
|
treeHead.astLeaves = [testvalue, functionname].concat(onArgPos.map((x,i) => {
|
|
bF.parserPrintdbgline('$', 'ON GOTO/GOSUB Arguments #'+(i+1), lnum, recDepth);
|
|
|
|
// check for empty tokens
|
|
if (x.end - x.start <= 0) throw new ParserError("Malformed ON arguments");
|
|
|
|
return bF._parseExpr(lnum,
|
|
tokens.slice(x.start, x.end),
|
|
states.slice(x.start, x.end),
|
|
recDepth + 1,
|
|
true
|
|
);
|
|
}));
|
|
|
|
return treeHead;
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
// ## case for:
|
|
// | "(" , stmt , ")"
|
|
if (parenStart == 0 && parenEnd == tokens.length - 1) {
|
|
bF.parserPrintdbgline('$', '( Stmt )', lnum, recDepth);
|
|
return bF._parseStmt(lnum,
|
|
tokens.slice(parenStart + 1, parenEnd),
|
|
states.slice(parenStart + 1, parenEnd),
|
|
recDepth + 1
|
|
);
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
// ## case for:
|
|
// | expr ;
|
|
try {
|
|
bF.parserPrintdbgline('$', 'Trying Expression Call...', lnum, recDepth);
|
|
return bF._parseExpr(lnum, tokens, states, recDepth + 1);
|
|
}
|
|
catch (e) {
|
|
bF.parserPrintdbgline('$', 'Error!', lnum, recDepth);
|
|
throw new ParserError("Statement cannot be parsed in "+lnum+": "+e.stack);
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
throw new ParserError("Statement cannot be parsed in "+lnum);
|
|
} // END of STMT
|
|
|
|
|
|
/** Parses following EBNF rule:
|
|
expr = (* this basically blocks some funny attemps such as using DEFUN as anon function because everything is global in BASIC *)
|
|
lit
|
|
| "(" , expr , ")"
|
|
| "IF" , expr_sans_asgn , "THEN" , expr , ["ELSE" , expr]
|
|
| kywd , expr (* also deals with FOR statement; kywd = ? words that exists on the list of predefined function that are not operators ? ; *)
|
|
| function_call
|
|
| expr , op , expr
|
|
| op_uni , expr ;
|
|
|
|
* @return: BasicAST
|
|
*/
|
|
bF._parseExpr = function(lnum, tokens, states, recDepth, ifMode) {
|
|
bF.parserPrintdbg2('E', lnum, tokens, states, recDepth);
|
|
|
|
/*************************************************************************/
|
|
|
|
// ## special case for virtual dummy element (e.g. phantom element on "PRINT SPC(20);")
|
|
if (tokens[0] === undefined && states[0] === undefined) {
|
|
let treeHead = new BasicAST();
|
|
treeHead.astLnum = lnum;
|
|
treeHead.astValue = undefined;
|
|
treeHead.astType = "null";
|
|
|
|
return treeHead;
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
let headTkn = tokens[0].toUpperCase();
|
|
let headSta = states[0];
|
|
|
|
/*************************************************************************/
|
|
|
|
// ## case for:
|
|
// lit
|
|
if (!bF._EquationIllegalTokens.includes(headTkn) && tokens.length == 1) {
|
|
bF.parserPrintdbgline('E', 'Literal Call', lnum, recDepth);
|
|
return bF._parseLit(lnum, tokens, states, recDepth + 1);
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
// scan for operators with highest precedence, use rightmost one if multiple were found
|
|
let topmostOp;
|
|
let topmostOpPrc = 0;
|
|
let operatorPos = -1;
|
|
|
|
// find and mark position of parentheses
|
|
// properly deal with the nested function calls
|
|
let parenDepth = 0;
|
|
let parenStart = -1;
|
|
let parenEnd = -1;
|
|
|
|
// Scan for unmatched parens and mark off the right operator we must deal with
|
|
// every function_call need to re-scan because it is recursively called
|
|
for (let k = 0; k < tokens.length; k++) {
|
|
// increase paren depth and mark paren start position
|
|
if (tokens[k] == "(" && states[k] != "qot") {
|
|
parenDepth += 1;
|
|
if (parenStart == -1 && parenDepth == 1) parenStart = k;
|
|
}
|
|
// decrease paren depth
|
|
else if (tokens[k] == ")" && states[k] != "qot") {
|
|
if (parenEnd == -1 && parenDepth == 1) parenEnd = k;
|
|
parenDepth -= 1;
|
|
}
|
|
|
|
// determine the right operator to deal with
|
|
if (parenDepth == 0) {
|
|
if (states[k] == "op" && bF.isSemanticLiteral(tokens[k-1], states[k-1]) &&
|
|
((bF._opPrc[tokens[k].toUpperCase()] > topmostOpPrc) ||
|
|
(!bF._opRh[tokens[k].toUpperCase()] && bF._opPrc[tokens[k].toUpperCase()] == topmostOpPrc))
|
|
) {
|
|
topmostOp = tokens[k].toUpperCase();
|
|
topmostOpPrc = bF._opPrc[tokens[k].toUpperCase()];
|
|
operatorPos = k;
|
|
}
|
|
}
|
|
}
|
|
|
|
// unmatched brackets, duh!
|
|
if (parenDepth != 0) throw lang.syntaxfehler(lnum, lang.unmatchedBrackets);
|
|
|
|
/*************************************************************************/
|
|
|
|
// ## case for:
|
|
// | "(" , expr , ")"
|
|
if (parenStart == 0 && parenEnd == tokens.length - 1) {
|
|
bF.parserPrintdbgline('E', '( Expr )', lnum, recDepth);
|
|
|
|
return bF._parseExpr(lnum,
|
|
tokens.slice(parenStart + 1, parenEnd),
|
|
states.slice(parenStart + 1, parenEnd),
|
|
recDepth + 1
|
|
);
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
// ## case for:
|
|
// | "IF" , expr_sans_asgn , "THEN" , expr , ["ELSE" , expr]
|
|
try {
|
|
bF.parserPrintdbgline('E', "Trying IF Expression...", lnum, recDepth);
|
|
return bF._parseIfMode(lnum, tokens, states, recDepth + 1, false);
|
|
}
|
|
// if ParserError is raised, continue to apply other rules
|
|
catch (e) {
|
|
bF.parserPrintdbgline('E', 'It was NOT!', lnum, recDepth);
|
|
if (!(e instanceof ParserError)) throw e;
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
// ## case for:
|
|
// | kywd , expr (* kywd = ? words that exists on the list of predefined function that are not operators ? ; *)
|
|
if (bStatus.builtin[headTkn] && headSta == "lit" && !bF._opPrc[headTkn] &&
|
|
states[1] != "paren"
|
|
) {
|
|
bF.parserPrintdbgline('E', 'Builtin Function Call w/o Paren', lnum, recDepth);
|
|
|
|
return bF._parseFunctionCall(lnum, tokens, states, recDepth + 1);
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
// ## case for:
|
|
// (* at this point, if OP is found in paren-level 0, skip function_call *)
|
|
// | function_call ;
|
|
if (topmostOp === undefined) { // don't remove this IF statement!
|
|
try {
|
|
bF.parserPrintdbgline('E', "Trying Function Call...", lnum, recDepth);
|
|
return bF._parseFunctionCall(lnum, tokens, states, recDepth + 1);
|
|
}
|
|
// if ParserError is raised, continue to apply other rules
|
|
catch (e) {
|
|
bF.parserPrintdbgline('E', 'It was NOT!', lnum, recDepth);
|
|
if (!(e instanceof ParserError)) throw e;
|
|
}
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
// ## case for:
|
|
// | expr , op, expr
|
|
// | op_uni , expr
|
|
// if operator is found, split by the operator and recursively parse the LH and RH
|
|
if (topmostOp !== undefined) {
|
|
bF.parserPrintdbgline('E', 'Operators', lnum, recDepth);
|
|
|
|
if (ifMode && topmostOp == "=") throw lang.syntaxfehler(lnum, "'=' used on IF, did you mean '=='?");
|
|
if (ifMode && topmostOp == ":") throw lang.syntaxfehler(lnum, "':' used on IF");
|
|
|
|
|
|
// this is the AST we're going to build up and return
|
|
// (other IF clauses don't use this)
|
|
let treeHead = new BasicAST();
|
|
treeHead.astLnum = lnum;
|
|
treeHead.astValue = topmostOp;
|
|
treeHead.astType = "op";
|
|
|
|
// BINARY_OP?
|
|
if (operatorPos > 0) {
|
|
let subtknL = tokens.slice(0, operatorPos);
|
|
let substaL = states.slice(0, operatorPos);
|
|
let subtknR = tokens.slice(operatorPos + 1, tokens.length);
|
|
let substaR = states.slice(operatorPos + 1, tokens.length);
|
|
|
|
treeHead.astLeaves[0] = bF._parseExpr(lnum, subtknL, substaL, recDepth + 1);
|
|
treeHead.astLeaves[1] = bF._parseExpr(lnum, subtknR, substaR, recDepth + 1);
|
|
}
|
|
else {
|
|
if (topmostOp === "-") treeHead.astValue = "UNARYMINUS"
|
|
else if (topmostOp === "+") treeHead.astValue = "UNARYPLUS"
|
|
else if (topmostOp === "NOT") treeHead.astValue = "UNARYLOGICNOT"
|
|
else if (topmostOp === "BNOT") treeHead.astValue = "UNARYBNOT"
|
|
else throw new ParserError(`Unknown unary op '${topmostOp}'`)
|
|
|
|
treeHead.astLeaves[0] = bF._parseExpr(lnum,
|
|
tokens.slice(operatorPos + 1, tokens.length),
|
|
states.slice(operatorPos + 1, states.length),
|
|
recDepth + 1
|
|
);
|
|
}
|
|
|
|
return treeHead;
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
throw new ParserError("Expression cannot be parsed in "+lnum);
|
|
} // END of EXPR
|
|
|
|
|
|
/** Parses following EBNF rule:
|
|
"IF" , expr_sans_asgn , "THEN" , stmt , ["ELSE" , stmt]
|
|
| "IF" , expr_sans_asgn , "THEN" , expr , ["ELSE" , expr]
|
|
if exprMode is true, only the latter will be used; former otherwise
|
|
* @return: BasicAST
|
|
*/
|
|
bF._parseIfMode = function(lnum, tokens, states, recDepth, exprMode) {
|
|
bF.parserPrintdbg2('/', lnum, tokens, states, recDepth);
|
|
|
|
/*************************************************************************/
|
|
|
|
let headTkn = tokens[0].toUpperCase();
|
|
let headSta = states[0];
|
|
|
|
let parseFunction = (exprMode) ? bF._parseExpr : bF._parseStmt
|
|
|
|
let thenPos = -1;
|
|
let elsePos = -1;
|
|
let parenDepth = 0;
|
|
let parenStart = -1;
|
|
let parenEnd = -1;
|
|
|
|
// scan for parens that will be used for several rules
|
|
// also find nearest THEN and ELSE but also take parens into account
|
|
for (let k = 0; k < tokens.length; k++) {
|
|
// increase paren depth and mark paren start position
|
|
if (tokens[k] == "(" && states[k] != "qot") {
|
|
parenDepth += 1;
|
|
if (parenStart == -1 && parenDepth == 1) parenStart = k;
|
|
}
|
|
// decrease paren depth
|
|
else if (tokens[k] == ")" && states[k] != "qot") {
|
|
if (parenEnd == -1 && parenDepth == 1) parenEnd = k;
|
|
parenDepth -= 1;
|
|
}
|
|
|
|
if (parenDepth == 0) {
|
|
if (-1 == thenPos && "THEN" == tokens[k].toUpperCase() && "lit" == states[k])
|
|
thenPos = k;
|
|
else if (-1 == elsePos && "ELSE" == tokens[k].toUpperCase() && "lit" == states[k])
|
|
elsePos = k;
|
|
}
|
|
}
|
|
|
|
// unmatched brackets, duh!
|
|
if (parenDepth != 0) throw lang.syntaxfehler(lnum, lang.unmatchedBrackets);
|
|
|
|
let treeHead = new BasicAST();
|
|
treeHead.astLnum = lnum;
|
|
|
|
// ## case for:
|
|
// "IF" , expr_sans_asgn , "THEN" , stmt , ["ELSE" , stmt]
|
|
if ("IF" == headTkn && "lit" == headSta) {
|
|
|
|
// "THEN" not found, raise error!
|
|
if (thenPos == -1) throw lang.syntaxfehler(lnum, "IF without THEN");
|
|
|
|
treeHead.astValue = "IF";
|
|
treeHead.astType = "function";
|
|
|
|
treeHead.astLeaves[0] = bF._parseExpr(lnum,
|
|
tokens.slice(1, thenPos),
|
|
states.slice(1, thenPos),
|
|
recDepth + 1,
|
|
true // if_equation mode
|
|
);
|
|
treeHead.astLeaves[1] = parseFunction(lnum,
|
|
tokens.slice(thenPos + 1, (elsePos != -1) ? elsePos : tokens.length),
|
|
states.slice(thenPos + 1, (elsePos != -1) ? elsePos : tokens.length),
|
|
recDepth + 1
|
|
);
|
|
if (elsePos != -1)
|
|
treeHead.astLeaves[2] = parseFunction(lnum,
|
|
tokens.slice(elsePos + 1, tokens.length),
|
|
states.slice(elsePos + 1, tokens.length),
|
|
recDepth + 1
|
|
);
|
|
|
|
return treeHead;
|
|
}
|
|
|
|
throw new ParserError("not an IF "+(exprMode) ? "expression" : "statement");
|
|
} // END of IF
|
|
|
|
|
|
/** Parses following EBNF rule:
|
|
function_call =
|
|
ident , "(" , [expr , {argsep , expr} , [argsep]] , ")"
|
|
| ident , expr , {argsep , expr} , [argsep] ;
|
|
* @return: BasicAST
|
|
*/
|
|
bF._parseFunctionCall = function(lnum, tokens, states, recDepth) {
|
|
bF.parserPrintdbg2(String.fromCharCode(0x192), lnum, tokens, states, recDepth);
|
|
|
|
/*************************************************************************/
|
|
|
|
let parenDepth = 0;
|
|
let parenStart = -1;
|
|
let parenEnd = -1;
|
|
let _argsepsOnLevelZero = []; // argseps collected when parenDepth == 0
|
|
let _argsepsOnLevelOne = []; // argseps collected when parenDepth == 1
|
|
|
|
// Scan for unmatched parens and mark off the right operator we must deal with
|
|
// every function_call need to re-scan because it is recursively called
|
|
for (let k = 0; k < tokens.length; k++) {
|
|
// increase paren depth and mark paren start position
|
|
if (tokens[k] == "(" && states[k] != "qot") {
|
|
parenDepth += 1;
|
|
if (parenStart == -1 && parenDepth == 1) parenStart = k;
|
|
}
|
|
// decrease paren depth
|
|
else if (tokens[k] == ")" && states[k] != "qot") {
|
|
if (parenEnd == -1 && parenDepth == 1) parenEnd = k;
|
|
parenDepth -= 1;
|
|
}
|
|
|
|
if (parenDepth == 0 && states[k] == "sep")
|
|
_argsepsOnLevelZero.push(k);
|
|
if (parenDepth == 1 && states[k] == "sep")
|
|
_argsepsOnLevelOne.push(k);
|
|
}
|
|
|
|
// unmatched brackets, duh!
|
|
if (parenDepth != 0) throw lang.syntaxfehler(lnum, lang.unmatchedBrackets);
|
|
let parenUsed = (parenStart == 1);
|
|
// && parenEnd == tokens.length - 1);
|
|
// if starting paren is found, just use it
|
|
// this prevents "RND(~~)*K" to be parsed as [RND, (~~)*K]
|
|
|
|
/*************************************************************************/
|
|
|
|
// ## case for:
|
|
// ident , "(" , [expr , {argsep , expr} , [argsep]] , ")"
|
|
// | ident , expr , {argsep , expr} , [argsep] ;
|
|
bF.parserPrintdbgline(String.fromCharCode(0x192), `Function Call (parenUsed: ${parenUsed})`, lnum, recDepth);
|
|
|
|
let treeHead = new BasicAST();
|
|
treeHead.astLnum = lnum;
|
|
|
|
// set function name and also check for syntax by deliberately parsing the word
|
|
treeHead.astValue = bF._parseIdent(lnum, [tokens[0]], [states[0]], recDepth + 1).astValue; // always UPPERCASE
|
|
|
|
// 5 8 11 [end]
|
|
let argSeps = parenUsed ? _argsepsOnLevelOne : _argsepsOnLevelZero; // choose which "sep tray" to use
|
|
bF.parserPrintdbgline(String.fromCharCode(0x192), "argSeps = "+argSeps, lnum, recDepth);
|
|
// 1 6 9 12
|
|
let argStartPos = [1 + (parenUsed)].concat(argSeps.map(k => k+1));
|
|
bF.parserPrintdbgline(String.fromCharCode(0x192), "argStartPos = "+argStartPos, lnum, recDepth);
|
|
// [1,5) [6,8) [9,11) [12,end)
|
|
let argPos = argStartPos.map((s,i) => {return{start:s, end:(argSeps[i] || (parenUsed ? parenEnd : tokens.length) )}}); // use end of token position as separator position
|
|
bF.parserPrintdbgline(String.fromCharCode(0x192), "argPos = "+argPos.map(it=>`${it.start}/${it.end}`), lnum, recDepth);
|
|
|
|
// check for trailing separator
|
|
|
|
|
|
// recursively parse function arguments
|
|
treeHead.astLeaves = argPos.map((x,i) => {
|
|
bF.parserPrintdbgline(String.fromCharCode(0x192), 'Function Arguments #'+(i+1), lnum, recDepth);
|
|
|
|
// check for empty tokens
|
|
if (x.end - x.start < 0) throw new ParserError("not a function call because it's malformed");
|
|
|
|
return bF._parseExpr(lnum,
|
|
tokens.slice(x.start, x.end),
|
|
states.slice(x.start, x.end),
|
|
recDepth + 1
|
|
)}
|
|
);
|
|
treeHead.astType = "function";
|
|
treeHead.astSeps = argSeps.map(i => tokens[i]);
|
|
bF.parserPrintdbgline(String.fromCharCode(0x192), "astSeps = "+treeHead.astSeps, lnum, recDepth);
|
|
|
|
return treeHead;
|
|
}
|
|
|
|
|
|
bF._parseIdent = function(lnum, tokens, states, recDepth) {
|
|
bF.parserPrintdbg2('i', lnum, tokens, states, recDepth);
|
|
|
|
if (!Array.isArray(tokens) && !Array.isArray(states)) throw new ParserError("Tokens and states are not array");
|
|
if (tokens.length != 1 || states[0] != "lit") throw new ParserError(`illegal tokens '${tokens}' with states '${states}' in ${lnum}`);
|
|
|
|
let treeHead = new BasicAST();
|
|
treeHead.astLnum = lnum;
|
|
treeHead.astValue = tokens[0].toUpperCase();
|
|
treeHead.astType = "lit";
|
|
|
|
return treeHead;
|
|
}
|
|
/**
|
|
* @return: BasicAST
|
|
*/
|
|
bF._parseLit = function(lnum, tokens, states, recDepth, functionMode) {
|
|
bF.parserPrintdbg2(String.fromCharCode(0xA2), lnum, tokens, states, recDepth);
|
|
|
|
if (!Array.isArray(tokens) && !Array.isArray(states)) throw new ParserError("Tokens and states are not array");
|
|
if (tokens.length != 1) throw new ParserError("parseLit 1");
|
|
|
|
let treeHead = new BasicAST();
|
|
treeHead.astLnum = lnum;
|
|
treeHead.astValue = ("qot" == states[0]) ? tokens[0] : tokens[0].toUpperCase();
|
|
treeHead.astType = ("qot" == states[0]) ? "string" :
|
|
("num" == states[0]) ? "num" :
|
|
(functionMode) ? "function" : "lit";
|
|
|
|
return treeHead;
|
|
}
|
|
|
|
|
|
// @return is defined in BasicAST
|
|
let JStoBASICtype = function(object) {
|
|
if (typeof object === "boolean") return "bool";
|
|
else if (object === undefined) return "null";
|
|
else if (object.arrName !== undefined) return "internal_arrindexing_lazy";
|
|
else if (object.asgnVarName !== undefined) return "internal_assignment_object";
|
|
else if (object instanceof ForGen || object.start !== undefined && object.end !== undefined && typeof object.hasNext == "function") return "generator";
|
|
else if (object instanceof BasicAST || object.astLeaves !== undefined) return "usrdefun";
|
|
else if (Array.isArray(object)) return "array";
|
|
else if (isNumable(object)) return "num";
|
|
else if (typeof object === "string" || object instanceof String) return "string";
|
|
// buncha error msgs
|
|
else throw Error("BasicIntpError: un-translatable object with typeof "+(typeof object)+",\ntoString = "+object+",\nentries = "+Object.entries(object));
|
|
}
|
|
let SyntaxTreeReturnObj = function(type, value, nextLine) {
|
|
if (nextLine === undefined || !Array.isArray(nextLine))
|
|
throw Error("TODO change format of troNextLine to [linenumber, stmtnumber]")
|
|
|
|
this.troType = type;
|
|
this.troValue = value;
|
|
this.troNextLine = nextLine; // TODO change format of troNextLine to [linenumber, stmtnumber]
|
|
}
|
|
let JumpObj = function(targetLnum, targetStmtNum, fromLnum, rawValue) {
|
|
this.jmpNext = [targetLnum, targetStmtNum];
|
|
this.jmpFrom = fromLnum;
|
|
this.jmpReturningValue = rawValue;
|
|
}
|
|
/**
|
|
* @param lnum line number of BASIC
|
|
* @param syntaxTree BasicAST
|
|
* @param recDepth recursion depth used internally
|
|
*
|
|
* @return syntaxTreeReturnObject if recursion is escaped
|
|
*/
|
|
bF._troNOP = function(lnum, stmtnum) { return new SyntaxTreeReturnObj("null", undefined, [lnum, stmtnum+1]); }
|
|
bF._executeSyntaxTree = function(lnum, stmtnum, syntaxTree, recDepth) {
|
|
if (lnum === undefined || stmtnum === undefined) throw Error(`Line or statement number is undefined: (${lnum},${stmtnum})`);
|
|
|
|
let _debugExec = (!PROD) && true;
|
|
let _debugPrintCurrentLine = (!PROD) && true;
|
|
let recWedge = ">".repeat(recDepth) + " ";
|
|
|
|
if (_debugExec || _debugPrintCurrentLine) serial.println(recWedge+"@@ EXECUTE @@");
|
|
if (_debugPrintCurrentLine && recDepth == 0) {
|
|
serial.println("Syntax Tree in "+lnum+":");
|
|
serial.println(astToString(syntaxTree));
|
|
}
|
|
|
|
if (syntaxTree == undefined) return bF._troNOP(lnum, stmtnum);
|
|
else if (syntaxTree.astValue == undefined) { // empty meaningless parens
|
|
if (syntaxTree.astLeaves.length > 1) throw Error("WTF");
|
|
return bF._executeSyntaxTree(lnum, stmtnum, syntaxTree.astLeaves[0], recDepth);
|
|
}
|
|
else if (syntaxTree.astType == "function" || syntaxTree.astType == "op") {
|
|
if (_debugExec) serial.println(recWedge+"function|operator");
|
|
if (_debugExec) serial.println(recWedge+astToString(syntaxTree));
|
|
var funcName = syntaxTree.astValue.toUpperCase();
|
|
var func = (bStatus.builtin[funcName] === undefined) ? undefined : bStatus.builtin[funcName].f;
|
|
|
|
|
|
if ("IF" == funcName) {
|
|
if (syntaxTree.astLeaves.length != 2 && syntaxTree.astLeaves.length != 3) throw lang.syntaxfehler(lnum);
|
|
var testedval = bF._executeSyntaxTree(lnum, stmtnum, syntaxTree.astLeaves[0], recDepth + 1);
|
|
|
|
if (_debugExec) {
|
|
serial.println(recWedge+"testedval:");
|
|
serial.println(recWedge+"type="+testedval.troValue.astType);
|
|
serial.println(recWedge+"value="+testedval.troValue.astValue);
|
|
serial.println(recWedge+"nextLine="+testedval.troValue.astNextLine);
|
|
}
|
|
|
|
try {
|
|
var iftest = bStatus.builtin["TEST"].f(lnum, stmtnum, [testedval]);
|
|
|
|
if (!iftest && syntaxTree.astLeaves[2] !== undefined)
|
|
return bF._executeSyntaxTree(lnum, stmtnum, syntaxTree.astLeaves[2], recDepth + 1);
|
|
else if (iftest)
|
|
return bF._executeSyntaxTree(lnum, stmtnum, syntaxTree.astLeaves[1], recDepth + 1);
|
|
else
|
|
return bF._troNOP(lnum, stmtnum);
|
|
}
|
|
catch (e) {
|
|
serial.printerr(`${e}\n${e.stack || "Stack trace undefined"}`);
|
|
throw lang.errorinline(lnum, "TEST", e);
|
|
}
|
|
}
|
|
else if ("DEFUN" == funcName) {
|
|
if (syntaxTree.astLeaves.length !== 2) throw lang.syntaxfehler(lnum, "DEFUN 1");
|
|
let nameTree = syntaxTree.astLeaves[0];
|
|
let exprTree = syntaxTree.astLeaves[1];
|
|
|
|
// create parametres map
|
|
// NOTE: firstmost param ('x' as in foo(x,y,z)) gets index 0
|
|
let defunName = nameTree.astValue.toUpperCase();
|
|
let defunRenamingMap = {};
|
|
nameTree.astLeaves.forEach((it, i) => {
|
|
if (it.astType !== "lit") throw lang.syntaxfehler(lnum, "4");
|
|
return defunRenamingMap[it.astValue] = i;
|
|
});
|
|
|
|
// rename the parametres
|
|
bF._recurseApplyAST(exprTree, (it) => {
|
|
if (it.astType == "lit" || it.astType == "function") {
|
|
// check if parametre name is valid
|
|
// if the name is invalid, regard it as a global variable (i.e. do nothing)
|
|
if (defunRenamingMap[it.astValue] !== undefined) {
|
|
it.astType = "defun_args";
|
|
it.astValue = defunRenamingMap[it.astValue];
|
|
}
|
|
}
|
|
});
|
|
|
|
// test print new tree
|
|
if (DBGON) {
|
|
serial.println("[BASIC.DEFUN] defun debug info for function "+defunName);
|
|
serial.println("[BASIC.DEFUN] defun name tree: ");
|
|
serial.println(astToString(nameTree));
|
|
serial.println("[BASIC.DEFUN] defun renaming map: "+Object.entries(defunRenamingMap));
|
|
serial.println("[BASIC.DEFUN] defun expression tree:");
|
|
serial.println(astToString(exprTree));
|
|
}
|
|
// check if the variable name already exists
|
|
// search from constants
|
|
if (_basicConsts[defunName]) throw lang.asgnOnConst(lnum, defunName);
|
|
// search from builtin functions
|
|
if (bStatus.builtin[defunName] !== undefined || bF[defunName.toLowerCase()] !== undefined)
|
|
throw lang.dupDef(lnum, stmtnum, defunName);
|
|
|
|
// finally assign the function to the variable table
|
|
bStatus.vars[defunName] = new BasicVar(exprTree, "usrdefun");
|
|
|
|
return new SyntaxTreeReturnObj("internal_lambda", exprTree, [lnum, stmtnum + 1]);
|
|
}
|
|
else if ("ON" == funcName) {
|
|
if (syntaxTree.astLeaves.length < 3) throw lang.badFunctionCallFormat();
|
|
|
|
let testValue = bF._executeSyntaxTree(lnum, stmtnum, syntaxTree.astLeaves[0], recDepth + 1);
|
|
let functionName = syntaxTree.astLeaves[1].astValue;
|
|
let arrays = [];
|
|
for (let k = 2; k < syntaxTree.astLeaves.length; k++)
|
|
arrays.push(bF._executeSyntaxTree(lnum, stmtnum, syntaxTree.astLeaves[k], recDepth + 1));
|
|
|
|
try {
|
|
let r = bStatus.builtin["ON"].f(lnum, stmtnum, [functionName, testValue].concat(arrays))
|
|
return new SyntaxTreeReturnObj(JStoBASICtype(r.jmpReturningValue), r.jmpReturningValue, r.jmpNext);
|
|
}
|
|
catch (e) {
|
|
serial.printerr(`${e}\n${e.stack || "Stack trace undefined"}`);
|
|
throw lang.errorinline(lnum, "ON error", e);
|
|
}
|
|
}
|
|
else {
|
|
var args = syntaxTree.astLeaves.map(it => bF._executeSyntaxTree(lnum, stmtnum, it, recDepth + 1));
|
|
|
|
if (_debugExec) {
|
|
serial.println(recWedge+"fn call name: "+funcName);
|
|
serial.println(recWedge+"fn call args: "+(args.map(it => it.troType+" "+it.troValue)).join(", "));
|
|
}
|
|
|
|
// func not in builtins (e.g. array access, user-defined function defuns)
|
|
if (func === undefined) {
|
|
var someVar = bStatus.vars[funcName];
|
|
|
|
if (DBGON) {
|
|
serial.println(lnum+" _executeSyntaxTree: "+someVar);
|
|
if (typeof someVar == "object")
|
|
serial.println(lnum+" _executeSyntaxTree: "+Object.entries(someVar));
|
|
}
|
|
|
|
if (someVar === undefined) {
|
|
throw lang.syntaxfehler(lnum, funcName + " is undefined");
|
|
}
|
|
else if ("array" == someVar.bvType) {
|
|
func = bStatus.getArrayIndexFun(lnum, stmtnum, funcName, someVar.bvLiteral);
|
|
}
|
|
else if ("usrdefun" == someVar.bvType) {
|
|
func = bStatus.getDefunThunk(lnum, stmtnum, someVar.bvLiteral);
|
|
}
|
|
else {
|
|
throw lang.syntaxfehler(lnum, funcName + " is not a function or an array");
|
|
}
|
|
}
|
|
// call whatever the 'func' has whether it's builtin or we just made shit up right above
|
|
try {
|
|
if (func === undefined) {
|
|
throw lang.syntaxfehler(lnum, funcName + " is undefined");
|
|
}
|
|
|
|
let funcCallResult = func(lnum, stmtnum, args, syntaxTree.astSeps);
|
|
|
|
if (funcCallResult instanceof SyntaxTreeReturnObj) return funcCallResult;
|
|
|
|
let retVal = (funcCallResult instanceof JumpObj) ? funcCallResult.jmpReturningValue : funcCallResult;
|
|
|
|
return new SyntaxTreeReturnObj(
|
|
JStoBASICtype(retVal),
|
|
retVal,
|
|
(funcCallResult instanceof JumpObj) ? funcCallResult.jmpNext : [lnum, stmtnum + 1]
|
|
);
|
|
}
|
|
catch (e) {
|
|
serial.printerr(`${e}\n${e.stack || "Stack trace undefined"}`);
|
|
throw lang.errorinline(lnum, (funcName === undefined) ? "undefined" : funcName, (e === undefined) ? "undefined" : e);
|
|
}
|
|
}
|
|
}
|
|
// array indexing in the tree (caused by indexing array within recursive DEFUN)
|
|
else if (syntaxTree.astType == "array" && syntaxTree.astLeaves[0] !== undefined) {
|
|
let indexer = bStatus.getArrayIndexFun(lnum, stmtnum, "substituted array", syntaxTree.astValue);
|
|
let indices = syntaxTree.astLeaves.map(it=>bF._executeSyntaxTree(lnum, stmtnum, it, recDepth + 1));
|
|
let retVal = indexer(lnum, stmtnum, indices);
|
|
if (_debugExec) serial.println(recWedge+`indexing substituted array(${Object.entries(indices)}) = ${Object.entries(retVal)}`);
|
|
return new SyntaxTreeReturnObj(
|
|
JStoBASICtype(retVal),
|
|
retVal,
|
|
[lnum, stmtnum + 1]
|
|
);
|
|
}
|
|
// userdefun with args
|
|
// apply given arguments (syntaxTree.astLeaves) to the expression tree and evaluate it
|
|
// if tree has leaves and their leaves are all terminal leaves (does not have grandchild AND they are not usrdefun)
|
|
else if (syntaxTree.astType == "usrdefun" && syntaxTree.astLeaves[0] !== undefined &&
|
|
syntaxTree.astLeaves.every(child => child.astLeaves[0] == undefined && child.astType !== "usrdefun")) {
|
|
let oldTree = syntaxTree.astValue;
|
|
let argsTro = syntaxTree.astLeaves.map(it => bF._executeSyntaxTree(lnum, stmtnum, it, recDepth + 1));
|
|
let newTree = oldTree; // curryDefun() will make a clone of it for us
|
|
for (let k = 0; k < argsTro.length; k++) {
|
|
newTree = curryDefun(oldTree, argsTro[k].troValue);
|
|
}
|
|
|
|
// make a javascript function out of the new tree, thess lines are now basically the same as above function calling lines
|
|
let func = bStatus.getDefunThunk(lnum, stmtnum, newTree);
|
|
|
|
// call whatever the 'func' has whether it's builtin or we just made shit up right above
|
|
try {
|
|
//let funcCallResult = func(lnum, stmtnum, argsTro, syntaxTree.astSeps);
|
|
let funcCallResult = func(lnum, stmtnum, [], syntaxTree.astSeps);
|
|
|
|
if (funcCallResult instanceof SyntaxTreeReturnObj) return funcCallResult;
|
|
|
|
let retVal = (funcCallResult instanceof JumpObj) ? funcCallResult.jmpReturningValue : funcCallResult;
|
|
|
|
return new SyntaxTreeReturnObj(
|
|
JStoBASICtype(retVal),
|
|
retVal,
|
|
(funcCallResult instanceof JumpObj) ? funcCallResult.jmpNext : [lnum, stmtnum + 1]
|
|
);
|
|
}
|
|
catch (e) {
|
|
serial.printerr(`${e}\n${e.stack || "Stack trace undefined"}`);
|
|
throw lang.errorinline(lnum, (funcName === undefined) ? "undefined" : funcName, (e === undefined) ? "undefined" : e);
|
|
}
|
|
}
|
|
else if (syntaxTree.astType == "num") {
|
|
if (_debugExec) serial.println(recWedge+"num "+((syntaxTree.astValue)*1));
|
|
return new SyntaxTreeReturnObj(syntaxTree.astType, (syntaxTree.astValue)*1, [lnum, stmtnum + 1]);
|
|
}
|
|
else if (syntaxTree.astType == "lit" || literalTypes.includes(syntaxTree.astType)) {
|
|
if (_debugExec) serial.println(recWedge+"literal with astType: "+syntaxTree.astType+", astValue: "+syntaxTree.astValue);
|
|
return new SyntaxTreeReturnObj(syntaxTree.astType, syntaxTree.astValue, [lnum, stmtnum + 1]);
|
|
}
|
|
else if (syntaxTree.astType == "null") {
|
|
if (_debugExec) serial.println(recWedge+"null")
|
|
return bF._executeSyntaxTree(lnum, stmtnum, syntaxTree.astLeaves[0], recDepth + 1);
|
|
}
|
|
else {
|
|
serial.println(recWedge+"Parsing error in "+lnum);
|
|
serial.println(recWedge+astToString(syntaxTree));
|
|
throw Error("Parsing error");
|
|
}
|
|
}; // END OF bF._executeSyntaxTree
|
|
// @return ARRAY of BasicAST
|
|
bF._interpretLine = function(lnum, cmd) {
|
|
let _debugprintHighestLevel = false;
|
|
|
|
if (cmd.toUpperCase().startsWith("REM")) {
|
|
if (_debugprintHighestLevel) serial.println(lnum+" "+cmd);
|
|
return undefined;
|
|
}
|
|
|
|
// TOKENISE
|
|
let tokenisedObject = bF._tokenise(lnum, cmd);
|
|
let tokens = tokenisedObject.tokens;
|
|
let states = tokenisedObject.states;
|
|
|
|
|
|
// ELABORATION : distinguish numbers and operators from literals
|
|
bF._parserElaboration(lnum, tokens, states);
|
|
|
|
// PARSING (SYNTAX ANALYSIS)
|
|
let syntaxTrees = bF._parseTokens(lnum, tokens, states);
|
|
|
|
// syntax tree pruning
|
|
|
|
// turn UNARYMINUS(num) to -num
|
|
syntaxTrees.forEach(syntaxTree => {
|
|
if (syntaxTree !== undefined) {
|
|
bF._recurseApplyAST(syntaxTree, tree => {
|
|
if (tree.astValue == "UNARYMINUS" && tree.astType == "op" &&
|
|
tree.astLeaves[1] === undefined && tree.astLeaves[0] !== undefined && tree.astLeaves[0].astType == "num"
|
|
) {
|
|
tree.astValue = -(tree.astLeaves[0].astValue);
|
|
tree.astType = JStoBASICtype(tree.astValue);
|
|
tree.astLeaves = [];
|
|
}
|
|
else if (tree.astValue == "UNARYPLUS" && tree.astType == "op" &&
|
|
tree.astLeaves[1] === undefined && tree.astLeaves[0] !== undefined && tree.astLeaves[0].astType == "num"
|
|
) {
|
|
tree.astValue = +(tree.astLeaves[0].astValue);
|
|
tree.astType = JStoBASICtype(tree.astValue);
|
|
tree.astLeaves = [];
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
if (_debugprintHighestLevel) {
|
|
syntaxTrees.forEach((t,i) => {
|
|
serial.println("\nParsed Statement #"+(i+1));
|
|
serial.println(astToString(t));
|
|
});
|
|
}
|
|
|
|
return syntaxTrees;
|
|
}; // end INTERPRETLINE
|
|
// @return [next line number, next statement number]
|
|
bF._executeAndGet = function(lnum, stmtnum, syntaxTree) {
|
|
if (lnum === undefined || stmtnum === undefined) throw Error(`Line or statement number is undefined: (${lnum},${stmtnum})`);
|
|
|
|
// EXECUTE
|
|
try {
|
|
var execResult = bF._executeSyntaxTree(lnum, stmtnum, syntaxTree, 0);
|
|
|
|
if (DBGON) serial.println(`Line ${lnum} TRO: ${Object.entries(execResult)}`);
|
|
|
|
return execResult.troNextLine;
|
|
}
|
|
catch (e) {
|
|
serial.printerr(`ERROR on ${lnum}:${stmtnum} -- PARSE TREE:\n${astToString(syntaxTree)}\nERROR CONTENTS:\n${e}\n${e.stack || "Stack trace undefined"}`);
|
|
throw e;
|
|
}
|
|
};
|
|
bF._basicList = function(v, i, arr) {
|
|
if (i < 10) print(" ");
|
|
if (i < 100) print(" ");
|
|
print(i);
|
|
print(" ");
|
|
println(v);
|
|
};
|
|
bF.list = function(args) { // LIST function
|
|
if (args.length == 1) {
|
|
cmdbuf.forEach(bF._basicList);
|
|
}
|
|
else if (args.length == 2) {
|
|
if (cmdbuf[args[1]] !== undefined)
|
|
bF._basicList(cmdbuf[args[1]], args[1], undefined);
|
|
}
|
|
else {
|
|
var lastIndex = (args[2] === ".") ? cmdbuf.length - 1 : (args[2] | 0);
|
|
var i = 0;
|
|
for (i = args[1]; i <= lastIndex; i++) {
|
|
var cmd = cmdbuf[i];
|
|
if (cmd !== undefined) {
|
|
bF._basicList(cmd, i, cmdbuf);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
bF.system = function(args) { // SYSTEM function
|
|
tbasexit = true;
|
|
};
|
|
bF.new = function(args) { // NEW function
|
|
if (args) cmdbuf = [];
|
|
bStatus.vars = initBvars();
|
|
gotoLabels = {};
|
|
DATA_CONSTS = [];
|
|
DATA_CURSOR = 0;
|
|
INDEX_BASE = 0;
|
|
};
|
|
bF.renum = function(args) { // RENUM function
|
|
var newcmdbuf = [];
|
|
var linenumRelation = [[]];
|
|
var cnt = 10;
|
|
for (var k = 0; k < cmdbuf.length; k++) {
|
|
if (cmdbuf[k] !== undefined) {
|
|
newcmdbuf[cnt] = cmdbuf[k].trim();
|
|
linenumRelation[k] = cnt;
|
|
cnt += 10;
|
|
}
|
|
}
|
|
// deal with goto/gosub line numbers
|
|
for (k = 0; k < newcmdbuf.length; k++) {
|
|
if (newcmdbuf[k] !== undefined && newcmdbuf[k].toLowerCase().startsWith("goto ")) {
|
|
newcmdbuf[k] = "GOTO " + linenumRelation[newcmdbuf[k].match(reNum)[0]];
|
|
}
|
|
else if (newcmdbuf[k] !== undefined && newcmdbuf[k].toLowerCase().startsWith("gosub ")) {
|
|
newcmdbuf[k] = "GOSUB " + linenumRelation[newcmdbuf[k].match(reNum)[0]];
|
|
}
|
|
else if (newcmdbuf[k] !== undefined && newcmdbuf[k].toLowerCase().startsWith("breakto ")) {
|
|
newcmdbuf[k] = "BREAKTO " + linenumRelation[newcmdbuf[k].match(reNum)[0]];
|
|
}
|
|
}
|
|
cmdbuf = newcmdbuf.slice(); // make shallow copy
|
|
|
|
// recalculate memory footprint
|
|
cmdbufMemFootPrint = 0;
|
|
cmdbuf.forEach((v, i, arr) =>
|
|
cmdbufMemFootPrint += ("" + i).length + 1 + v.length
|
|
);
|
|
};
|
|
bF.fre = function(args) {
|
|
println(vmemsize - getUsedMemSize());
|
|
};
|
|
bF.tron = function(args) {
|
|
TRACEON = true;
|
|
};
|
|
bF.troff = function(args) {
|
|
TRACEON = false;
|
|
};
|
|
bF.prescanStmts = ["DATA","LABEL"];
|
|
bF.run = function(args) { // RUN function
|
|
bF.new(false);
|
|
|
|
let programTrees = [];
|
|
// pre-build the trees
|
|
prescan = true;
|
|
cmdbuf.forEach((linestr, linenum) => {
|
|
let trees = bF._interpretLine(linenum, linestr.trim());
|
|
programTrees[linenum] = trees
|
|
// do prescan job (data, label, etc)
|
|
if (trees !== undefined) {
|
|
trees.forEach((t, i) => {
|
|
if (t !== undefined && bF.prescanStmts.includes(t.astValue)) {
|
|
bF._executeAndGet(linenum, i, t);
|
|
}
|
|
})
|
|
}
|
|
});
|
|
prescan = false;
|
|
|
|
if (!PROD && DBGON) {
|
|
serial.println("[BASIC] final DATA: "+DATA_CONSTS);
|
|
}
|
|
|
|
// actually execute the program
|
|
let lnum = 1;
|
|
let stmtnum = 0;
|
|
let oldnum = 1;
|
|
let tree = undefined;
|
|
do {
|
|
if (programTrees[lnum] !== undefined) {
|
|
if (TRACEON) {
|
|
//print(`[${lnum}]`);
|
|
serial.println("[BASIC] Line "+lnum);
|
|
}
|
|
|
|
oldnum = lnum;
|
|
tree = (programTrees[lnum] !== undefined) ? programTrees[lnum][stmtnum] : undefined;
|
|
|
|
if (tree !== undefined) {
|
|
let nextObj = bF._executeAndGet(lnum, stmtnum, tree);
|
|
lnum = nextObj[0];
|
|
stmtnum = nextObj[1];
|
|
}
|
|
else {
|
|
lnum += 1;
|
|
stmtnum = 0;
|
|
}
|
|
}
|
|
else {
|
|
lnum += 1;
|
|
}
|
|
if (lnum < 0) throw lang.badNumberFormat;
|
|
if (con.hitterminate()) {
|
|
println("Break in "+oldnum);
|
|
break;
|
|
}
|
|
} while (lnum < cmdbuf.length)
|
|
con.resetkeybuf();
|
|
};
|
|
bF.save = function(args) { // SAVE function
|
|
if (args[1] === undefined) throw lang.missingOperand;
|
|
if (!args[1].toUpperCase().endsWith(".BAS"))
|
|
args[1] += ".bas";
|
|
fs.open(args[1], "W");
|
|
var sb = "";
|
|
cmdbuf.forEach((v, i) => sb += i+" "+v+"\n");
|
|
fs.write(sb);
|
|
};
|
|
bF.load = function(args) { // LOAD function
|
|
if (args[1] === undefined) throw lang.missingOperand;
|
|
var fileOpened = fs.open(args[1], "R");
|
|
if (!fileOpened) {
|
|
fileOpened = fs.open(args[1]+".BAS", "R");
|
|
}
|
|
if (!fileOpened) {
|
|
fileOpened = fs.open(args[1]+".bas", "R");
|
|
}
|
|
if (!fileOpened) {
|
|
throw lang.noSuchFile;
|
|
return;
|
|
}
|
|
var prg = fs.readAll();
|
|
|
|
// reset the environment
|
|
bF.new(true);
|
|
|
|
// read the source
|
|
prg.split('\n').forEach((line) => {
|
|
var i = line.indexOf(" ");
|
|
var lnum = line.slice(0, i);
|
|
if (isNaN(lnum)) throw lang.illegalType();
|
|
cmdbuf[lnum] = line.slice(i + 1, line.length);
|
|
});
|
|
};
|
|
bF.catalog = function(args) { // CATALOG function
|
|
if (args[1] === undefined) args[1] = "\\";
|
|
var pathOpened = fs.open(args[1], 'R');
|
|
if (!pathOpened) {
|
|
throw lang.noSuchFile;
|
|
return;
|
|
}
|
|
var port = _BIOS.FIRST_BOOTABLE_PORT[0];
|
|
com.sendMessage(port, "LIST");
|
|
println(com.pullMessage(port));
|
|
};
|
|
Object.freeze(bF);
|
|
|
|
if (exec_args !== undefined && exec_args[1] !== undefined) {
|
|
bF.load(["load", exec_args[1]]);
|
|
try {
|
|
bF.run();
|
|
return 0;
|
|
}
|
|
catch (e) {
|
|
serial.printerr(`${e}\n${e.stack || "Stack trace undefined"}`);
|
|
println(e);
|
|
}
|
|
}
|
|
|
|
while (!tbasexit) {
|
|
var line = sys.read().trim();
|
|
|
|
cmdbufMemFootPrint += line.length;
|
|
|
|
if (reLineNum.test(line)) {
|
|
var i = line.indexOf(" ");
|
|
cmdbuf[line.slice(0, i)] = line.slice(i + 1, line.length);
|
|
}
|
|
else if (line.length > 0) {
|
|
cmdbufMemFootPrint -= line.length;
|
|
var cmd = line.split(" ");
|
|
if (bF[cmd[0].toLowerCase()] === undefined) {
|
|
serial.printerr("Unknown command: "+cmd[0].toLowerCase());
|
|
println(lang.syntaxfehler());
|
|
}
|
|
else {
|
|
try {
|
|
bF[cmd[0].toLowerCase()](cmd);
|
|
}
|
|
catch (e) {
|
|
serial.printerr(`${e}\n${e.stack || "Stack trace undefined"}`);
|
|
println(e);
|
|
}
|
|
}
|
|
|
|
println(prompt);
|
|
}
|
|
}
|
|
|
|
0;
|