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utils.js
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utils.js
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"use strict";
import * as jsunzip from "./lib/jsunzip.js";
export const runningInNode = typeof window === "undefined";
export function isFirefox() {
// With thanks to http://stackoverflow.com/questions/9847580/how-to-detect-safari-chrome-ie-firefox-and-opera-browser
// Opera 8.0+ (UA detection to detect Blink/v8-powered Opera)
return typeof InstallTrigger !== "undefined"; // Firefox 1.0+
}
export function parseAddr(s) {
if (s[0] === "$" || s[0] === "&") return parseInt(s.substring(1), 16);
if (s.indexOf("0x") === 0) return parseInt(s.substring(2), 16);
return parseInt(s, 16);
}
export const userKeymap = [];
export const BBC = {
SEMICOLON_PLUS: [7, 5],
MINUS: [7, 1],
LEFT_SQUARE_BRACKET: [8, 3],
RIGHT_SQUARE_BRACKET: [8, 5],
COMMA: [6, 6],
PERIOD: [7, 6],
SLASH: [8, 6],
SHIFTLOCK: [0, 5],
TAB: [0, 6],
RETURN: [9, 4],
DELETE: [9, 5],
COPY: [9, 6],
SHIFT: [0, 0],
ESCAPE: [0, 7],
CTRL: [1, 0],
CAPSLOCK: [0, 4],
LEFT: [9, 1],
UP: [9, 3],
RIGHT: [9, 7],
DOWN: [9, 2],
K0: [7, 2],
K1: [0, 3],
K2: [1, 3],
K3: [1, 1],
K4: [2, 1],
K5: [3, 1],
K6: [4, 3],
K7: [4, 2],
K8: [5, 1],
K9: [6, 2],
Q: [0, 1],
W: [1, 2],
E: [2, 2],
R: [3, 3],
T: [3, 2],
Y: [4, 4],
U: [5, 3],
I: [5, 2],
O: [6, 3],
P: [7, 3],
A: [1, 4],
S: [1, 5],
D: [2, 3],
F: [3, 4],
G: [3, 5],
H: [4, 5],
J: [5, 4],
K: [6, 4],
L: [6, 5],
Z: [1, 6],
X: [2, 4],
C: [2, 5],
V: [3, 6],
B: [4, 6],
N: [5, 5],
M: [5, 6],
F0: [0, 2],
F1: [1, 7],
F2: [2, 7],
F3: [3, 7],
F4: [4, 1],
F5: [4, 7],
F6: [5, 7],
F7: [6, 1],
F8: [6, 7],
F9: [7, 7],
SPACE: [2, 6],
UNDERSCORE_POUND: [8, 2],
AT: [7, 4],
COLON_STAR: [8, 4],
PIPE_BACKSLASH: [8, 7],
HAT_TILDE: [8, 1],
// row 1
NUMPADPLUS: [10, 3],
NUMPADMINUS: [11, 3],
NUMPADSLASH: [10, 4],
NUMPADASTERISK: [11, 5],
// row 2
NUMPAD7: [11, 1],
NUMPAD8: [10, 2],
NUMPAD9: [11, 2],
NUMPADHASH: [10, 5],
// row 3
NUMPAD4: [10, 7],
NUMPAD5: [11, 7],
NUMPAD6: [10, 1],
NUMPAD_DELETE: [11, 4],
//row4
NUMPAD1: [11, 6],
NUMPAD2: [12, 7],
NUMPAD3: [12, 6],
NUMPADCOMMA: [12, 5],
//row 5
NUMPAD0: [10, 6],
NUMPAD_DECIMAL_POINT: [12, 4],
NUMPADENTER: [12, 3],
};
export function stringToBBCKeys(str) {
const array = [];
let shiftState = false;
let capsLockState = true;
for (let i = 0; i < str.length; ++i) {
const c = str.charCodeAt(i);
let charStr = str.charAt(i);
let bbcKey = null;
let needsShift = false;
let needsCapsLock = true;
if (c >= 65 && c <= 90) {
// A-Z
bbcKey = BBC[charStr];
} else if (c >= 97 && c <= 122) {
// a-z
charStr = String.fromCharCode(c - 32);
bbcKey = BBC[charStr];
needsCapsLock = false;
} else if (c >= 48 && c <= 57) {
// 0-9
bbcKey = BBC["K" + charStr];
} else if (c >= 33 && c <= 41) {
// ! to )
charStr = String.fromCharCode(c + 16);
bbcKey = BBC["K" + charStr];
needsShift = true;
} else {
switch (charStr) {
case "\n":
bbcKey = BBC.RETURN;
break;
case "\t":
bbcKey = BBC.TAB;
break;
case " ":
bbcKey = BBC.SPACE;
break;
case "-":
bbcKey = BBC.MINUS;
break;
case "=":
bbcKey = BBC.MINUS;
needsShift = true;
break;
case "^":
bbcKey = BBC.HAT_TILDE;
break;
case "~":
bbcKey = BBC.HAT_TILDE;
needsShift = true;
break;
case "\\":
bbcKey = BBC.PIPE_BACKSLASH;
break;
case "|":
bbcKey = BBC.PIPE_BACKSLASH;
needsShift = true;
break;
case "@":
bbcKey = BBC.AT;
break;
case "[":
bbcKey = BBC.LEFT_SQUARE_BRACKET;
break;
case "{":
bbcKey = BBC.LEFT_SQUARE_BRACKET;
needsShift = true;
break;
case "_":
bbcKey = BBC.UNDERSCORE_POUND;
break;
case ";":
bbcKey = BBC.SEMICOLON_PLUS;
break;
case "+":
bbcKey = BBC.SEMICOLON_PLUS;
needsShift = true;
break;
case ":":
bbcKey = BBC.COLON_STAR;
break;
case "*":
bbcKey = BBC.COLON_STAR;
needsShift = true;
break;
case "]":
bbcKey = BBC.RIGHT_SQUARE_BRACKET;
break;
case "}":
bbcKey = BBC.RIGHT_SQUARE_BRACKET;
needsShift = true;
break;
case ",":
bbcKey = BBC.COMMA;
break;
case "<":
bbcKey = BBC.COMMA;
needsShift = true;
break;
case ".":
bbcKey = BBC.PERIOD;
break;
case ">":
bbcKey = BBC.PERIOD;
needsShift = true;
break;
case "/":
bbcKey = BBC.SLASH;
break;
case "?":
bbcKey = BBC.SLASH;
needsShift = true;
break;
}
}
if (!bbcKey) continue;
if ((needsShift && !shiftState) || (!needsShift && shiftState)) {
array.push(BBC.SHIFT);
shiftState = !shiftState;
}
if ((needsCapsLock && !capsLockState) || (!needsCapsLock && capsLockState)) {
array.push(BBC.CAPSLOCK);
capsLockState = !capsLockState;
}
array.push(bbcKey);
}
if (shiftState) array.push(BBC.SHIFT);
if (!capsLockState) array.push(BBC.CAPSLOCK);
return array;
}
/**
* Useful references:
* http://www.cambiaresearch.com/articles/15/javascript-char-codes-key-codes
* https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent.keyCode
*/
export const keyCodes = {
UNDEFINED: 0,
BACKSPACE: 8,
TAB: 9,
CLEAR: 12,
ENTER: 13,
SHIFT: 16,
CTRL: 17,
ALT: 18,
BREAK: 19,
CAPSLOCK: 20,
ESCAPE: 27,
SPACE: 32,
PAGEUP: 33,
PAGEDOWN: 34,
END: 35,
HOME: 36,
LEFT: 37,
UP: 38,
RIGHT: 39,
DOWN: 40,
PRINTSCREEN: 44,
INSERT: 45,
DELETE: 46,
K0: 48,
K1: 49,
K2: 50,
K3: 51,
K4: 52,
K5: 53,
K6: 54,
K7: 55,
K8: 56,
K9: 57,
A: 65,
B: 66,
C: 67,
D: 68,
E: 69,
F: 70,
G: 71,
H: 72,
I: 73,
J: 74,
K: 75,
L: 76,
M: 77,
N: 78,
O: 79,
P: 80,
Q: 81,
R: 82,
S: 83,
T: 84,
U: 85,
V: 86,
W: 87,
X: 88,
Y: 89,
Z: 90,
/* also META on Mac */
WINDOWS: 91,
MENU: 93,
NUMPAD0: 96,
NUMPAD1: 97,
NUMPAD2: 98,
NUMPAD3: 99,
NUMPAD4: 100,
NUMPAD5: 101,
NUMPAD6: 102,
NUMPAD7: 103,
NUMPAD8: 104,
NUMPAD9: 105,
NUMPADASTERISK: 106,
NUMPADPLUS: 107,
/* on numeric keypad in eg Germany*/
NUMPAD_DECIMAL_COMMA: 108,
NUMPADMINUS: 109,
/* on numeric keypad */
NUMPAD_DECIMAL_POINT: 110,
NUMPADSLASH: 111,
F1: 112,
F2: 113,
F3: 114,
F4: 115,
F5: 116,
F6: 117,
F7: 118,
F8: 119,
F9: 120,
F10: 121,
F11: 122,
F12: 123,
NUMLOCK: 144,
SCROLL_LOCK: 145,
VOLUMEUP: 174,
VOLUMEDOWN: 175,
FASTFORWARD: 176,
FASTREWIND: 177,
PLAYPAUSE: 179,
COMMA: 188,
PERIOD: 190,
SLASH: 191,
LEFT_SQUARE_BRACKET: 219,
BACKSLASH: 220,
RIGHT_SQUARE_BRACKET: 221,
NUMPADENTER: 255, // hack, jsbeeb only
SHIFT_LEFT: 256, // hack, jsbeeb only
SHIFT_RIGHT: 257, // hack, jsbeeb only
ALT_LEFT: 258, // hack, jsbeeb only
ALT_RIGHT: 259, // hack, jsbeeb only
CTRL_LEFT: 260, // hack, jsbeeb only
CTRL_RIGHT: 261, // hack, jsbeeb only
};
function detectKeyboardLayout() {
if (runningInNode) {
return "UK";
}
if (localStorage.keyboardLayout) {
return localStorage.keyboardLayout === "US" ? "US" : "UK";
}
if (navigator.language) {
if (navigator.language.toLowerCase() === "en-gb") return "UK";
if (navigator.language.toLowerCase() === "en-us") return "US";
}
return "UK"; // Default guess of UK
}
const isUKlayout = detectKeyboardLayout() === "UK";
if (isFirefox()) {
keyCodes.SEMICOLON = 59;
// #~ key (not on US keyboard)
keyCodes.HASH = 163;
keyCodes.APOSTROPHE = 222;
keyCodes.BACK_QUOTE = 192;
// Firefox doesn't return a keycode for this
keyCodes.MUTE = -1;
keyCodes.MINUS = 173;
keyCodes.EQUALS = 61;
} else {
// Chrome
// TODO: check other browsers
// https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent.keyCode
keyCodes.SEMICOLON = 186;
// #~ key (not on US keyboard)
keyCodes.HASH = isUKlayout ? 222 : 223;
keyCodes.APOSTROPHE = isUKlayout ? 192 : 222;
keyCodes.MUTE = 173;
keyCodes.MINUS = 189;
keyCodes.EQUALS = 187;
keyCodes.BACK_QUOTE = isUKlayout ? 223 : 192;
}
// Swap APOSTROPHE and BACK_QUOTE keys around for Mac users. They are the opposite to what jsbeeb expects.
// Swap them to what jsbeeb expects, and tidy up the hash key to prevent duplicate key mappings.
if (!runningInNode && window.navigator.userAgent.indexOf("Mac") !== -1) {
keyCodes.BACK_QUOTE = 192;
keyCodes.APOSTROPHE = 222;
keyCodes.HASH = 223;
}
export function getKeyMap(keyLayout) {
const keys2 = [];
// shift pressed
keys2[true] = {};
// shift not pressed
keys2[false] = {};
// shiftDown MUST be true or false (not undefined)
function doMap(s, colRow, shiftDown) {
if (keys2[shiftDown][s] && keys2[shiftDown][s] !== colRow) {
console.log(
"Warning: duplicate binding for key",
(shiftDown ? "<SHIFT>" : "") + s,
colRow,
keys2[shiftDown][s],
);
}
keys2[shiftDown][s] = colRow;
}
// shiftDown undefined -> map both
function map(s, colRow, shiftDown) {
if ((!s && s !== 0) || !colRow) {
console.log("error binding key", s, colRow);
}
if (typeof s === "string") {
s = s.charCodeAt(0);
}
if (shiftDown === undefined) {
doMap(s, colRow, true);
doMap(s, colRow, false);
} else {
doMap(s, colRow, shiftDown);
}
}
map(keyCodes.Q, BBC.Q);
map(keyCodes.W, BBC.W);
map(keyCodes.E, BBC.E);
map(keyCodes.R, BBC.R);
map(keyCodes.T, BBC.T);
map(keyCodes.Y, BBC.Y);
map(keyCodes.U, BBC.U);
map(keyCodes.I, BBC.I);
map(keyCodes.O, BBC.O);
map(keyCodes.P, BBC.P);
map(keyCodes.A, BBC.A);
map(keyCodes.S, BBC.S);
map(keyCodes.D, BBC.D);
map(keyCodes.F, BBC.F);
map(keyCodes.G, BBC.G);
map(keyCodes.H, BBC.H);
map(keyCodes.J, BBC.J);
map(keyCodes.K, BBC.K);
map(keyCodes.L, BBC.L);
map(keyCodes.Z, BBC.Z);
map(keyCodes.X, BBC.X);
map(keyCodes.C, BBC.C);
map(keyCodes.V, BBC.V);
map(keyCodes.B, BBC.B);
map(keyCodes.N, BBC.N);
map(keyCodes.M, BBC.M);
map(keyCodes.F10, BBC.F0); // F0 (mapped to F10)
map(keyCodes.F1, BBC.F1);
map(keyCodes.F2, BBC.F2);
map(keyCodes.F3, BBC.F3);
map(keyCodes.F4, BBC.F4);
map(keyCodes.F5, BBC.F5);
map(keyCodes.F6, BBC.F6);
map(keyCodes.F7, BBC.F7);
map(keyCodes.F8, BBC.F8);
map(keyCodes.F9, BBC.F9);
// these keys are in the same place on PC and BBC keyboards
// including shifted characters
// so can be the same for "natural" and "gaming"
map(keyCodes.COMMA, BBC.COMMA);
map(keyCodes.PERIOD, BBC.PERIOD);
map(keyCodes.SLASH, BBC.SLASH);
map(keyCodes.SPACE, BBC.SPACE);
map(keyCodes.TAB, BBC.TAB);
map(keyCodes.ENTER, BBC.RETURN);
map(keyCodes.SHIFT, BBC.SHIFT);
// see later map(keyCodes.SHIFT_LEFT, BBC.SHIFT_LEFT);
map(keyCodes.SHIFT_RIGHT, BBC.SHIFT);
// other keys to map to these in "game" layout too
map(keyCodes.LEFT, BBC.LEFT);
map(keyCodes.UP, BBC.UP);
map(keyCodes.RIGHT, BBC.RIGHT);
map(keyCodes.DOWN, BBC.DOWN);
if (keyLayout === "natural") {
// "natural" keyboard
map(keyCodes.SHIFT_LEFT, BBC.SHIFT);
// US Keyboard: has Tilde on <Shift>BACK_QUOTE
map(keyCodes.BACK_QUOTE, isUKlayout ? BBC.UNDERSCORE_POUND : BBC.HAT_TILDE);
map(keyCodes.APOSTROPHE, isUKlayout ? BBC.AT : BBC.K2, true);
map(keyCodes.K2, isUKlayout ? BBC.K2 : BBC.AT, true);
// 1st row
map(keyCodes.K3, BBC.UNDERSCORE_POUND, true);
map(keyCodes.K7, BBC.K6, true);
map(keyCodes.K8, BBC.COLON_STAR, true);
map(keyCodes.K9, BBC.K8, true);
map(keyCodes.K0, BBC.K9, true);
map(keyCodes.K2, BBC.K2, false);
map(keyCodes.K3, BBC.K3, false);
map(keyCodes.K7, BBC.K7, false);
map(keyCodes.K8, BBC.K8, false);
map(keyCodes.K9, BBC.K9, false);
map(keyCodes.K0, BBC.K0, false);
map(keyCodes.K1, BBC.K1);
map(keyCodes.K4, BBC.K4);
map(keyCodes.K5, BBC.K5);
map(keyCodes.K6, BBC.K6);
map(keyCodes.MINUS, BBC.MINUS);
// 2nd row
map(keyCodes.LEFT_SQUARE_BRACKET, BBC.LEFT_SQUARE_BRACKET);
map(keyCodes.RIGHT_SQUARE_BRACKET, BBC.RIGHT_SQUARE_BRACKET);
// 3rd row
map(keyCodes.SEMICOLON, BBC.SEMICOLON_PLUS);
map(keyCodes.APOSTROPHE, BBC.COLON_STAR, false);
map(keyCodes.HASH, BBC.HAT_TILDE); // OK for <Shift> at least
map(keyCodes.EQUALS, BBC.SEMICOLON_PLUS); // OK for <Shift> at least
map(keyCodes.WINDOWS, BBC.SHIFTLOCK);
map(keyCodes.END, BBC.COPY);
map(keyCodes.F11, BBC.COPY);
map(keyCodes.ESCAPE, BBC.ESCAPE);
map(keyCodes.CTRL, BBC.CTRL);
map(keyCodes.CTRL_LEFT, BBC.CTRL);
map(keyCodes.CTRL_RIGHT, BBC.CTRL);
map(keyCodes.CAPSLOCK, BBC.CAPSLOCK);
map(keyCodes.DELETE, BBC.DELETE);
map(keyCodes.BACKSPACE, BBC.DELETE);
map(keyCodes.BACKSLASH, BBC.PIPE_BACKSLASH);
} else if (keyLayout === "gaming") {
// gaming keyboard
// 1st row
map(keyCodes.ESCAPE, BBC.F0);
// 2nd row
map(keyCodes.BACK_QUOTE, BBC.ESCAPE);
map(keyCodes.K1, BBC.K1);
map(keyCodes.K2, BBC.K2);
map(keyCodes.K3, BBC.K3);
map(keyCodes.K4, BBC.K4);
map(keyCodes.K5, BBC.K5);
map(keyCodes.K6, BBC.K6);
map(keyCodes.K7, BBC.K7);
map(keyCodes.K8, BBC.K8);
map(keyCodes.K9, BBC.K9);
map(keyCodes.K0, BBC.K0);
map(keyCodes.MINUS, BBC.MINUS);
map(keyCodes.EQUALS, BBC.HAT_TILDE);
map(keyCodes.BACKSPACE, BBC.PIPE_BACKSLASH);
map(keyCodes.INSERT, BBC.LEFT);
map(keyCodes.HOME, BBC.RIGHT);
// 3rd row
map(keyCodes.LEFT_SQUARE_BRACKET, BBC.AT);
map(keyCodes.RIGHT_SQUARE_BRACKET, BBC.LEFT_SQUARE_BRACKET);
// no key for BBC.UNDERSCORE_POUND in UK
// see 4th row for US mapping keyCodes.BACKSLASH
map(keyCodes.DELETE, BBC.UP);
map(keyCodes.END, BBC.DOWN);
// 4th row
// no key for BBC.CAPSLOCK (mapped to CTRL_LEFT below)
map(keyCodes.CAPSLOCK, BBC.CTRL);
map(keyCodes.SEMICOLON, BBC.SEMICOLON_PLUS);
map(keyCodes.APOSTROPHE, BBC.COLON_STAR);
// UK keyboard (key missing on US)
map(keyCodes.HASH, BBC.RIGHT_SQUARE_BRACKET);
// UK has extra key \| for SHIFT
map(keyCodes.SHIFT_LEFT, isUKlayout ? BBC.SHIFTLOCK : BBC.SHIFT);
// UK: key is between SHIFT and Z
// US: key is above ENTER
map(keyCodes.BACKSLASH, isUKlayout ? BBC.SHIFT : BBC.UNDERSCORE_POUND);
// 5th row
// for Zalaga
map(keyCodes.CTRL_LEFT, BBC.CAPSLOCK);
map(keyCodes.ALT_LEFT, BBC.CTRL);
// should be 4th row, not enough keys
map(keyCodes.MENU, BBC.DELETE);
map(keyCodes.CTRL_RIGHT, BBC.COPY);
// not in correct location
map(keyCodes.ALT_RIGHT, BBC.SHIFTLOCK);
map(keyCodes.WINDOWS, BBC.SHIFTLOCK);
} else {
// Physical, and default
map(keyCodes.K1, BBC.K1);
map(keyCodes.K2, BBC.K2);
map(keyCodes.K3, BBC.K3);
map(keyCodes.K4, BBC.K4);
map(keyCodes.K5, BBC.K5);
map(keyCodes.K6, BBC.K6);
map(keyCodes.K7, BBC.K7);
map(keyCodes.K8, BBC.K8);
map(keyCodes.K9, BBC.K9);
map(keyCodes.K0, BBC.K0);
map(keyCodes.SHIFT_LEFT, BBC.SHIFT);
map(keyCodes.EQUALS, BBC.HAT_TILDE); // ^~ on +/=
map(keyCodes.SEMICOLON, BBC.SEMICOLON_PLUS); // ';' / '+'
map(keyCodes.MINUS, BBC.MINUS); // '-' / '=' mapped to underscore
map(keyCodes.LEFT_SQUARE_BRACKET, BBC.LEFT_SQUARE_BRACKET); // maps to [{
map(keyCodes.RIGHT_SQUARE_BRACKET, BBC.RIGHT_SQUARE_BRACKET); // maps to ]}
map(keyCodes.COMMA, BBC.COMMA); // ',' / '<'
map(keyCodes.PERIOD, BBC.PERIOD); // '.' / '>'
map(keyCodes.SLASH, BBC.SLASH); // '/' / '?'
map(keyCodes.WINDOWS, BBC.SHIFTLOCK); // shift lock mapped to "windows" key
map(keyCodes.TAB, BBC.TAB); // tab
map(keyCodes.ENTER, BBC.RETURN); // return
map(keyCodes.DELETE, BBC.DELETE); // delete
map(keyCodes.BACKSPACE, BBC.DELETE); // delete
map(keyCodes.END, BBC.COPY); // copy key is end
map(keyCodes.F11, BBC.COPY); // copy key is end for Apple
map(keyCodes.SHIFT, BBC.SHIFT); // shift
map(keyCodes.ESCAPE, BBC.ESCAPE); // escape
map(keyCodes.CTRL, BBC.CTRL);
map(keyCodes.CTRL_LEFT, BBC.CTRL);
map(keyCodes.CTRL_RIGHT, BBC.CTRL);
map(keyCodes.CAPSLOCK, BBC.CAPSLOCK); // caps (on Rich's/Mike's computer)
map(keyCodes.LEFT, BBC.LEFT); // arrow left
map(keyCodes.UP, BBC.UP); // arrow up
map(keyCodes.RIGHT, BBC.RIGHT); // arrow right
map(keyCodes.DOWN, BBC.DOWN); // arrow down
map(keyCodes.APOSTROPHE, BBC.COLON_STAR);
map(keyCodes.HASH, BBC.RIGHT_SQUARE_BRACKET);
// None of this last group in great locations.
// But better to have them mapped at least somewhere.
map(keyCodes.BACK_QUOTE, BBC.AT);
map(keyCodes.BACKSLASH, BBC.PIPE_BACKSLASH);
map(keyCodes.PAGEUP, BBC.UNDERSCORE_POUND);
}
// Master
map(keyCodes.NUMPAD0, BBC.NUMPAD0);
map(keyCodes.NUMPAD1, BBC.NUMPAD1);
map(keyCodes.NUMPAD2, BBC.NUMPAD2);
map(keyCodes.NUMPAD3, BBC.NUMPAD3);
map(keyCodes.NUMPAD4, BBC.NUMPAD4);
map(keyCodes.NUMPAD5, BBC.NUMPAD5);
map(keyCodes.NUMPAD6, BBC.NUMPAD6);
map(keyCodes.NUMPAD7, BBC.NUMPAD7);
map(keyCodes.NUMPAD8, BBC.NUMPAD8);
map(keyCodes.NUMPAD9, BBC.NUMPAD9);
// small hack in main.js/keyCode() to make this work
map(keyCodes.NUMPAD_DECIMAL_POINT, BBC.NUMPAD_DECIMAL_POINT);
// "natural" mapping
map(keyCodes.NUMPADPLUS, BBC.NUMPADPLUS);
map(keyCodes.NUMPADMINUS, BBC.NUMPADMINUS);
map(keyCodes.NUMPADSLASH, BBC.NUMPADSLASH);
map(keyCodes.NUMPADASTERISK, BBC.NUMPADASTERISK);
//map(???, BBC.NUMPADCOMMA);
//map(???, BBC.NUMPADHASH);
// no keycode for NUMPADENTER, small hack in main.js/keyCode()
map(keyCodes.NUMPADENTER, BBC.NUMPADENTER);
// TODO: "game" mapping
// eg Master Dunjunz needs # Del 3 , * Enter
// https://web.archive.org/web/20080305042238/http://bbc.nvg.org/doc/games/Dunjunz-docs.txt
// user keymapping
// do last (to override defaults)
while (userKeymap.length > 0) {
const mapping = userKeymap.pop();
map(keyCodes[mapping.native], BBC[mapping.bbc]);
}
return keys2;
}
export function hexbyte(value) {
return ((value >>> 4) & 0xf).toString(16) + (value & 0xf).toString(16);
}
export function hexword(value) {
return hexbyte(value >>> 8) + hexbyte(value & 0xff);
}
export function hd(reader, start, end, opts) {
opts = opts || {};
const width = opts.width || 16;
const gap = opts.gap === undefined ? 8 : opts.gap;
const res = [];
let str = "";
let j = 0;
for (let i = start; i < end; ++i) {
str += " ";
str += hexbyte(reader(i));
if (++j === gap) str += " ";
if (j === width) {
res.push(str);
str = "";
j = 0;
}
}
if (str) res.push(str);
let joined = "";
for (let i = 0; i < res.length; ++i) {
joined += hexword(start + i * width) + " :" + res[i] + "\n";
}
return joined;
}
export function signExtend(val) {
return val >= 128 ? val - 256 : val;
}
export function noop() {}
export function bench() {
for (let j = 0; j < 10; ++j) {
let res = 0;
const start = Date.now();
for (let i = 0; i < 4096 * 1024; ++i) {
res += signExtend(i & 0xff);
}
const tt = Date.now() - start;
console.log(res, tt);
}
}
export function noteEvent(category, type, label) {
if (
!runningInNode &&
(window.location.host.endsWith(".godbolt.org") || window.location.host.endsWith(".xania.org"))
) {
// Only note events on the public site
/*global gtag*/
gtag("event", category, { type, label });
}
console.log("event noted:", category, type, label);
}
let baseUrl = "";
export function setBaseUrl(url) {
baseUrl = url;
}
export function uint8ArrayToString(array) {
let str = "";
for (let i = 0; i < array.length; ++i) str += String.fromCharCode(array[i]);
return str;
}
export function stringToUint8Array(str) {
if (str instanceof Uint8Array) return str;
const len = str.length;
const array = new Uint8Array(len);
for (let i = 0; i < len; ++i) array[i] = str.charCodeAt(i) & 0xff;
return array;
}
function loadDataHttp(url) {
return new Promise(function (resolve, reject) {
const request = new XMLHttpRequest();
request.open("GET", baseUrl + url, true);
request.overrideMimeType("text/plain; charset=x-user-defined");
request.onload = function () {
if (request.status !== 200) reject(new Error("Unable to load " + url + ", http code " + request.status));
if (typeof request.response !== "string") {
resolve(request.response);
} else {
resolve(stringToUint8Array(request.response));
}
};
request.onerror = function () {
reject(new Error("A network error occurred loading " + url));
};
request.send(null);
});
}
async function loadDataNode(url) {
if (typeof readbuffer !== "undefined") {
// d8 shell
/*global readbuffer*/
return new Uint8Array(readbuffer(url));
} else if (typeof read !== "undefined") {
// SpiderMonkey shell
/*global read*/
return read(url, "binary");
} else {
// Node
const fs = await import("fs");
if (url[0] === "/") url = "." + url;
return fs.readFileSync(url);
}
}
export function loadData(url) {
if (runningInNode) {
return loadDataNode(url);
} else {
return loadDataHttp(url);
}
}
export function readInt32(data, offset) {
return (data[offset + 3] << 24) | (data[offset + 2] << 16) | (data[offset + 1] << 8) | data[offset + 0];
}
export function readInt16(data, offset) {
return (data[offset + 1] << 8) | data[offset + 0];
}
const tempBuf = new ArrayBuffer(4);
const tempBuf8 = new Uint8Array(tempBuf);
const tempBufF32 = new Float32Array(tempBuf);
export function readFloat32(data, offset) {
tempBuf8[0] = data[offset];
tempBuf8[1] = data[offset + 1];
tempBuf8[2] = data[offset + 2];
tempBuf8[3] = data[offset + 3];
return tempBufF32[0];
}
export function ungzip(data) {
const tinf = new jsunzip.TINF();
tinf.init();
const results = [];
while (data.length) {
if (results.length > 1000) throw new Error("Seems like something went wrong");
if (data[0] !== 0x1f || data[1] !== 0x8b) throw new Error("Corrupt data");
let dataOffset = 10;
if (data[3] & 0x02) dataOffset += 2; // Header CRC
if (data[3] & 0x04) {
dataOffset += 2 + readInt16(data, dataOffset); // FEXTRA
}
if (data[3] & 0x08) {
while (data[dataOffset] !== 0) dataOffset++; // FILENAME
dataOffset++;
}
if (data[3] & 0x10) {
while (data[dataOffset] !== 0) dataOffset++; // FCOMMENT
dataOffset++;
}
let maxDecompressSize = 16384;
let result;
for (;;) {
// Loop around trying to decompress this block, doubling in size if we can't fit a block.
result = tinf.uncompress(data, dataOffset, maxDecompressSize);
if (result.status !== 0) throw "Unable to ungzip";
if (result.dataSize < maxDecompressSize) break;
maxDecompressSize *= 2;
}
results.push(result.data.subarray(0, result.dataSize));
const nextOffset = result.offset + 8; // skip CRC and uncompressed length
data = data.subarray(nextOffset);
}
const total = results.reduce(function (prev, cur) {
return prev + cur.length;
}, 0);
const finalData = new Uint8Array(total);
let offset = 0;
results.forEach(function (res) {
finalData.set(res, offset);
offset += res.length;
});
return finalData;
}
export class DataStream {
constructor(name, data, dontUnzip) {
this.name = name;
this.pos = 0;
this.data = stringToUint8Array(data);
if (!dontUnzip && this.data && this.data.length > 4 && this.data[0] === 0x1f && this.data[1] === 0x8b) {
console.log("Ungzipping " + name);
this.data = ungzip(this.data);
}
if (!this.data) {
throw new Error("No data in " + name);
}
this.end = this.data.length;
}
bytesLeft() {
return this.end - this.pos;
}
eof() {
return this.bytesLeft() === 0;
}
advance(distance) {
if (this.bytesLeft() < distance) throw new RangeError("EOF in " + this.name);
this.pos += distance;
return this.pos - distance;
}
readFloat32(pos) {
if (pos === undefined) pos = this.advance(4);
return readFloat32(this.data, pos);
}
readInt32(pos) {
if (pos === undefined) pos = this.advance(4);
return readInt32(this.data, pos);
}
readInt16(pos) {
if (pos === undefined) pos = this.advance(2);
return readInt16(this.data, pos);
}
readByte(pos) {
if (pos === undefined) pos = this.advance(1);
return this.data[pos];
}
readNulString(pos, maxLength) {
if (!maxLength) maxLength = 1024;
let posToUse = pos === undefined ? this.pos : pos;
let result = "";
let c;
while ((c = this.readByte(posToUse++)) !== 0 && --maxLength) {
result += String.fromCharCode(c);
}
if (maxLength === 0) return "";
if (pos === undefined) this.pos = posToUse;
return result;
}
substream(posOrLength, length) {
let pos;
if (length === undefined) {
length = posOrLength;
pos = this.advance(length);
} else {
pos = posOrLength;