pluotsorbet/utilities.ts

2148 строки
58 KiB
TypeScript

/*
* Copyright 2014 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var jsGlobal = (function() { return this || (1, eval)('this'); })();
var inBrowser = typeof console !== "undefined" && console.info;
declare var putstr;
declare var printErr;
declare var dateNow: () => number;
declare var dump: (message: string) => void;
function dumpLine(s) {
if (typeof dump !== "undefined") {
dump(s + "\n");
}
}
if (!jsGlobal.performance) {
jsGlobal.performance = {};
}
if (!jsGlobal.performance.now) {
jsGlobal.performance.now = typeof dateNow !== 'undefined' ? dateNow : Date.now;
}
function log(message?: any, ...optionalParams: any[]): void {
if (inBrowser) {
console.log.apply(console, arguments);
} else {
jsGlobal.print.apply(jsGlobal, arguments);
}
}
function warn(message?: any, ...optionalParams: any[]): void {
if (inBrowser) {
console.warn.apply(console, arguments);
} else {
jsGlobal.print(J2ME.IndentingWriter.YELLOW + message + J2ME.IndentingWriter.ENDC);
}
}
interface String {
padRight(c: string, n: number): string;
padLeft(c: string, n: number): string;
endsWith(s: string): boolean;
}
interface Function {
boundTo: boolean;
}
interface Math {
imul(a: number, b: number): number;
/**
* Returns the number of leading zeros of a number.
* @param x A numeric expression.
*/
clz32(x: number): number;
}
interface Error {
stack: string;
}
interface Uint8ClampedArray extends ArrayBufferView {
BYTES_PER_ELEMENT: number;
length: number;
[index: number]: number;
get(index: number): number;
set(index: number, value: number): void;
set(array: Uint8Array, offset?: number): void;
set(array: number[], offset?: number): void;
subarray(begin: number, end?: number): Uint8ClampedArray;
}
declare var Uint8ClampedArray: {
prototype: Uint8ClampedArray;
new (length: number): Uint8ClampedArray;
new (array: Uint8Array): Uint8ClampedArray;
new (array: number[]): Uint8ClampedArray;
new (buffer: ArrayBuffer, byteOffset?: number, length?: number): Uint8ClampedArray;
BYTES_PER_ELEMENT: number;
}
module J2ME {
export function isIdentifierStart(c) {
return (c === '$') || (c === '_') || (c === '\\') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
}
export function isIdentifierPart(c) {
return (c === '$') || (c === '_') || (c === '\\') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || ((c >= '0') && (c <= '9'));
}
export function isIdentifierName(s) {
if (!isIdentifierStart(s[0])) {
return false;
}
for (var i = 1; i < s.length; i++) {
if (!isIdentifierPart(s[i])) {
return false;
}
}
return true;
}
export enum CharacterCodes {
_0 = 48,
_1 = 49,
_2 = 50,
_3 = 51,
_4 = 52,
_5 = 53,
_6 = 54,
_7 = 55,
_8 = 56,
_9 = 57
}
/**
* The buffer length required to contain any unsigned 32-bit integer.
*/
/** @const */ export var UINT32_CHAR_BUFFER_LENGTH = 10; // "4294967295".length;
/** @const */ export var UINT32_MAX = 0xFFFFFFFF;
/** @const */ export var UINT32_MAX_DIV_10 = 0x19999999; // UINT32_MAX / 10;
/** @const */ export var UINT32_MAX_MOD_10 = 0x5; // UINT32_MAX % 10
export function isString(value): boolean {
return typeof value === "string";
}
export function isFunction(value): boolean {
return typeof value === "function";
}
export function isNumber(value): boolean {
return typeof value === "number";
}
export function isInteger(value): boolean {
return (value | 0) === value;
}
export function isArray(value): boolean {
return value instanceof Array;
}
export function isNumberOrString(value): boolean {
return typeof value === "number" || typeof value === "string";
}
export function isObject(value): boolean {
return typeof value === "object" || typeof value === 'function';
}
export function toNumber(x): number {
return +x;
}
export function isNumericString(value: string): boolean {
// ECMAScript 5.1 - 9.8.1 Note 1, this expression is true for all
// numbers x other than -0.
return String(Number(value)) === value;
}
/**
* Whether the specified |value| is a number or the string representation of a number.
*/
export function isNumeric(value: any): boolean {
if (typeof value === "number") {
return true;
}
if (typeof value === "string") {
// |value| is rarely numeric (it's usually an identifier), and the
// isIndex()/isNumericString() pair is slow and expensive, so we do a
// quick check for obvious non-numericalness first. Just checking if the
// first char is a 7-bit identifier char catches most cases.
var c = value.charCodeAt(0);
if ((65 <= c && c <= 90) || // 'A'..'Z'
(97 <= c && c <= 122) || // 'a'..'z'
(c === 36) || // '$'
(c === 95)) { // '_'
return false;
}
return isIndex(value) || isNumericString(value);
}
// Debug.notImplemented(typeof value);
return false;
}
/**
* Whether the specified |value| is an unsigned 32 bit number expressed as a number
* or string.
*/
export function isIndex(value: any): boolean {
// js/src/vm/String.cpp JSFlatString::isIndexSlow
// http://dxr.mozilla.org/mozilla-central/source/js/src/vm/String.cpp#474
var index = 0;
if (typeof value === "number") {
index = (value | 0);
if (value === index && index >= 0) {
return true;
}
return value >>> 0 === value;
}
if (typeof value !== "string") {
return false;
}
var length = value.length;
if (length === 0) {
return false;
}
if (value === "0") {
return true;
}
// Is there any way this will fit?
if (length > UINT32_CHAR_BUFFER_LENGTH) {
return false;
}
var i = 0;
index = value.charCodeAt(i++) - CharacterCodes._0;
if (index < 1 || index > 9) {
return false;
}
var oldIndex = 0;
var c = 0;
while (i < length) {
c = value.charCodeAt(i++) - CharacterCodes._0;
if (c < 0 || c > 9) {
return false;
}
oldIndex = index;
index = 10 * index + c;
}
/*
* Look out for "4294967296" and larger-number strings that fit in UINT32_CHAR_BUFFER_LENGTH.
* Only unsigned 32-bit integers shall pass.
*/
if ((oldIndex < UINT32_MAX_DIV_10) || (oldIndex === UINT32_MAX_DIV_10 && c <= UINT32_MAX_MOD_10)) {
return true;
}
return false;
}
export function isNullOrUndefined(value) {
return value == undefined;
}
export module Debug {
export function backtrace() {
try {
throw new Error();
} catch (e) {
return e.stack ? e.stack.split('\n').slice(2).join('\n') : '';
}
}
export function error(message: string) {
throw new Error(message);
}
export function assert(condition: any, message: any = "assertion failed") {
if (condition === "") { // avoid inadvertent false positive
condition = true;
}
if (!condition) {
Debug.error(message.toString());
}
}
export function assertUnreachable(msg: string): void {
var location = new Error().stack.split('\n')[1];
throw new Error("Reached unreachable location " + location + msg);
}
export function assertNotImplemented(condition: boolean, message: string) {
if (!condition) {
Debug.error("notImplemented: " + message);
}
}
export function warning(message: string) {
release || warn(message);
}
export function notUsed(message: string) {
release || Debug.assert(false, "Not Used " + message);
}
export function notImplemented(message: string) {
release || Debug.assert(false, "Not Implemented " + message);
}
export function abstractMethod(message: string) {
Debug.assert(false, "Abstract Method " + message);
}
var somewhatImplementedCache = {};
export function somewhatImplemented(message: string) {
if (somewhatImplementedCache[message]) {
return;
}
somewhatImplementedCache[message] = true;
Debug.warning("somewhatImplemented: " + message);
}
export function unexpected(message?: any) {
Debug.assert(false, "Unexpected: " + message);
}
export function untested(message?: any) {
Debug.warning("Congratulations, you've found a code path for which we haven't found a test case. Please submit the test case: " + message);
}
}
export function getTicks(): number {
return performance.now();
}
export module ArrayUtilities {
import assert = Debug.assert;
export var EMPTY_ARRAY = [];
export function makeArrays(length: number): any [][] {
var arrays = [];
for (var i = 0; i < length; i ++) {
arrays.push(new Array(i));
}
return arrays;
}
/**
* Pops elements from a source array into a destination array. This avoids
* allocations and should be faster. The elements in the destination array
* are pushed in the same order as they appear in the source array:
*
* popManyInto([1, 2, 3], 2, dst) => dst = [2, 3]
*/
export function popManyInto(src: any [], count: number, dst: any []) {
release || assert(src.length >= count);
for (var i = count - 1; i >= 0; i--) {
dst[i] = src.pop();
}
dst.length = count;
}
export function popMany<T>(array: T [], count: number): T [] {
release || assert(array.length >= count);
var start = array.length - count;
var result = array.slice(start, this.length);
array.splice(start, count);
return result;
}
/**
* Just deletes several array elements from the end of the list.
*/
export function popManyIntoVoid(array: any [], count: number) {
release || assert(array.length >= count);
array.length = array.length - count;
}
export function pushMany(dst: any [], src: any []) {
for (var i = 0; i < src.length; i++) {
dst.push(src[i]);
}
}
export function top(array: any []) {
return array.length && array[array.length - 1]
}
export function last(array: any []) {
return array.length && array[array.length - 1]
}
export function peek(array: any []) {
release || assert(array.length > 0);
return array[array.length - 1];
}
export function indexOf<T>(array: T [], value: T): number {
for (var i = 0, j = array.length; i < j; i++) {
if (array[i] === value) {
return i;
}
}
return -1;
}
export function pushUnique<T>(array: T [], value: T): number {
for (var i = 0, j = array.length; i < j; i++) {
if (array[i] === value) {
return i;
}
}
array.push(value);
return array.length - 1;
}
export function unique<T>(array: T []): T [] {
var result = [];
for (var i = 0; i < array.length; i++) {
pushUnique(result, array[i]);
}
return result;
}
export function copyFrom(dst: any [], src: any []) {
dst.length = 0;
ArrayUtilities.pushMany(dst, src);
}
/**
* Makes sure that a typed array has the requested capacity. If required, it creates a new
* instance of the array's class with a power-of-two capacity at least as large as required.
*
* Note: untyped because generics with constraints are pretty annoying.
*/
export function ensureTypedArrayCapacity(array: any, capacity: number): any {
if (array.length < capacity) {
var oldArray = array;
array = new array.constructor(IntegerUtilities.nearestPowerOfTwo(capacity));
array.set(oldArray, 0);
}
return array;
}
}
export module ObjectUtilities {
export function boxValue(value) {
if (isNullOrUndefined(value) || isObject(value)) {
return value;
}
return Object(value);
}
export function toKeyValueArray(object: Object) {
var hasOwnProperty = Object.prototype.hasOwnProperty;
var array = [];
for (var k in object) {
if (hasOwnProperty.call(object, k)) {
array.push([k, object[k]]);
}
}
return array;
}
export function isPrototypeWriteable(object: Object) {
return Object.getOwnPropertyDescriptor(object, "prototype").writable;
}
export function hasOwnProperty(object: Object, name: string): boolean {
return Object.prototype.hasOwnProperty.call(object, name);
}
export function propertyIsEnumerable(object: Object, name: string): boolean {
return Object.prototype.propertyIsEnumerable.call(object, name);
}
export function getOwnPropertyDescriptor(object: Object, name: string): PropertyDescriptor {
return Object.getOwnPropertyDescriptor(object, name);
}
export function hasOwnGetter(object: Object, name: string): boolean {
var d = Object.getOwnPropertyDescriptor(object, name);
return !!(d && d.get);
}
export function getOwnGetter(object: Object, name: string): () => any {
var d = Object.getOwnPropertyDescriptor(object, name);
return d ? d.get : null;
}
export function hasOwnSetter(object: Object, name: string): boolean {
var d = Object.getOwnPropertyDescriptor(object, name);
return !!(d && !!d.set);
}
export function createObject(prototype: Object) {
return Object.create(prototype);
}
export function createEmptyObject() {
return Object.create(null);
}
export function createMap<K, V>(): Map<K, V> {
return Object.create(null);
}
export function createArrayMap<K, V>(): Map<K, V> {
return <Map<K, V>><any>[];
}
export function defineReadOnlyProperty(object: Object, name: string, value: any) {
Object.defineProperty(object, name, {
value: value,
writable: false,
configurable: true,
enumerable: false
});
}
export function getOwnPropertyDescriptors(object: Object): Map<string, PropertyDescriptor> {
var o = ObjectUtilities.createMap<string, PropertyDescriptor>();
var properties = Object.getOwnPropertyNames(object);
for (var i = 0; i < properties.length; i++) {
o[properties[i]] = Object.getOwnPropertyDescriptor(object, properties[i]);
}
return o;
}
export function cloneObject(object: Object): Object {
var clone = Object.create(Object.getPrototypeOf(object));
copyOwnProperties(clone, object);
return clone;
}
export function copyProperties(object: Object, template: Object) {
for (var property in template) {
object[property] = template[property];
}
}
export function copyOwnProperties(object: Object, template: Object) {
for (var property in template) {
if (hasOwnProperty(template, property)) {
object[property] = template[property];
}
}
}
export function copyOwnPropertyDescriptors(object: Object, template: Object, overwrite = true) {
for (var property in template) {
if (hasOwnProperty(template, property)) {
var descriptor = Object.getOwnPropertyDescriptor(template, property);
if (!overwrite && hasOwnProperty(object, property)) {
continue
}
release || Debug.assert (descriptor);
try {
Object.defineProperty(object, property, descriptor);
} catch (e) {
// log("Can't define " + property);
}
}
}
}
export function getLatestGetterOrSetterPropertyDescriptor(object, name) {
var descriptor: PropertyDescriptor = {};
while (object) {
var tmp = Object.getOwnPropertyDescriptor(object, name);
if (tmp) {
descriptor.get = descriptor.get || tmp.get;
descriptor.set = descriptor.set || tmp.set;
}
if (descriptor.get && descriptor.set) {
break;
}
object = Object.getPrototypeOf(object);
}
return descriptor;
}
export function defineNonEnumerableGetterOrSetter(obj, name, value, isGetter) {
var descriptor = ObjectUtilities.getLatestGetterOrSetterPropertyDescriptor(obj, name);
descriptor.configurable = true;
descriptor.enumerable = false;
if (isGetter) {
descriptor.get = value;
} else {
descriptor.set = value;
}
Object.defineProperty(obj, name, descriptor);
}
export function defineNonEnumerableGetter(obj, name, getter) {
Object.defineProperty(obj, name, { get: getter,
configurable: true,
enumerable: false
});
}
export function defineNonEnumerableSetter(obj, name, setter) {
Object.defineProperty(obj, name, { set: setter,
configurable: true,
enumerable: false
});
}
export function defineNonEnumerableProperty(obj, name, value) {
Object.defineProperty(obj, name, { value: value,
writable: true,
configurable: true,
enumerable: false
});
}
export function defineNonEnumerableForwardingProperty(obj, name, otherName) {
Object.defineProperty(obj, name, {
get: FunctionUtilities.makeForwardingGetter(otherName),
set: FunctionUtilities.makeForwardingSetter(otherName),
configurable: true,
enumerable: false
});
}
export function defineNewNonEnumerableProperty(obj, name, value) {
release || Debug.assert (!Object.prototype.hasOwnProperty.call(obj, name), "Property: " + name + " already exits.");
ObjectUtilities.defineNonEnumerableProperty(obj, name, value);
}
}
export module FunctionUtilities {
export function makeForwardingGetter(target: string): () => any {
return <() => any> new Function("return this[\"" + target + "\"]");
}
export function makeForwardingSetter(target: string): (any) => void {
return <(any) => void> new Function("value", "this[\"" + target + "\"] = value;");
}
export function makeDebugForwardingSetter(target: string, checker: (x: any) => boolean): (any) => void {
return function (value) {
Debug.assert(checker(value), "Unexpected value for target " + target);
this[target] = value;
}
}
}
export module StringUtilities {
import assert = Debug.assert;
export function repeatString(c: string, n: number): string {
var s = "";
for (var i = 0; i < n; i++) {
s += c;
}
return s;
}
export function memorySizeToString(value: number) {
value |= 0;
var K = 1024;
var M = K * K;
if (value < K) {
return value + " B";
} else if (value < M) {
return (value / K).toFixed(2) + "KB";
} else {
return (value / M).toFixed(2) + "MB";
}
}
/**
* Returns a reasonably sized description of the |value|, to be used for debugging purposes.
*/
export function toSafeString(value) {
if (typeof value === "string") {
return "\"" + value + "\"";
}
if (typeof value === "number" || typeof value === "boolean") {
return String(value);
}
if (value instanceof Array) {
return "[] " + value.length;
}
return typeof value;
}
export function toSafeArrayString(array) {
var str = [];
for (var i = 0; i < array.length; i++) {
str.push(toSafeString(array[i]));
}
return str.join(", ");
}
export function escapeString(str: string) {
if (str !== undefined) {
str = str.replace(/[^\w$]/gi,"$"); /* No dots, colons, dashes and /s */
if (/^\d/.test(str)) { /* No digits at the beginning */
str = '$' + str;
}
}
return str;
}
export function quote(s: string): string {
return "\"" + s + "\"";
}
var json = false;
var escapeless = false;
var hexadecimal = false;
var renumber = false;
var quotes = "double";
function stringToArray(str) {
var length = str.length,
result = [],
i;
for (i = 0; i < length; ++i) {
result[i] = str.charAt(i);
}
return result;
}
function escapeAllowedCharacter(ch, next) {
var code = ch.charCodeAt(0), hex = code.toString(16), result = '\\';
switch (ch) {
case '\b':
result += 'b';
break;
case '\f':
result += 'f';
break;
case '\t':
result += 't';
break;
default:
if (json || code > 0xff) {
result += 'u' + '0000'.slice(hex.length) + hex;
} else if (ch === '\u0000' && '0123456789'.indexOf(next) < 0) {
result += '0';
} else if (ch === '\x0B') { // '\v'
result += 'x0B';
} else {
result += 'x' + '00'.slice(hex.length) + hex;
}
break;
}
return result;
}
function escapeDisallowedCharacter(ch) {
var result = '\\';
switch (ch) {
case '\\':
result += '\\';
break;
case '\n':
result += 'n';
break;
case '\r':
result += 'r';
break;
case '\u2028':
result += 'u2028';
break;
case '\u2029':
result += 'u2029';
break;
default:
throw new Error('Incorrectly classified character');
}
return result;
}
var escapeStringCacheCount = 0;
var escapeStringCache = Object.create(null);
export function escapeStringLiteral(str) {
var result, i, len, ch, singleQuotes = 0, doubleQuotes = 0, single, original = str;
result = escapeStringCache[original];
if (result) {
return result;
}
if (escapeStringCacheCount === 1024) {
escapeStringCache = Object.create(null);
escapeStringCacheCount = 0;
}
result = '';
if (typeof str[0] === 'undefined') {
str = stringToArray(str);
}
for (i = 0, len = str.length; i < len; ++i) {
ch = str[i];
if (ch === '\'') {
++singleQuotes;
} else if (ch === '"') {
++doubleQuotes;
} else if (ch === '/' && json) {
result += '\\';
} else if ('\\\n\r\u2028\u2029'.indexOf(ch) >= 0) {
result += escapeDisallowedCharacter(ch);
continue;
} else if ((json && ch < ' ') || !(json || escapeless || (ch >= ' ' && ch <= '~'))) {
result += escapeAllowedCharacter(ch, str[i + 1]);
continue;
}
result += ch;
}
single = !(quotes === 'double' || (quotes === 'auto' && doubleQuotes < singleQuotes));
str = result;
result = single ? '\'' : '"';
if (typeof str[0] === 'undefined') {
str = stringToArray(str);
}
for (i = 0, len = str.length; i < len; ++i) {
ch = str[i];
if ((ch === '\'' && single) || (ch === '"' && !single)) {
result += '\\';
}
result += ch;
}
result += (single ? '\'' : '"');
escapeStringCache[original] = result;
escapeStringCacheCount ++;
return result;
}
/**
* Workaround for max stack size limit.
*/
export function fromCharCodeArray(buffer: Uint8Array): string {
var str = "", SLICE = 1024 * 16;
for (var i = 0; i < buffer.length; i += SLICE) {
var chunk = Math.min(buffer.length - i, SLICE);
str += String.fromCharCode.apply(null, buffer.subarray(i, i + chunk));
}
return str;
}
var _encoding = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789$_';
var arrays = [null, new Array(1), new Array(2), new Array(3), new Array(4), new Array(5), new Array(6)];
export function variableLengthEncodeInt32(n) {
var e = _encoding;
var bitCount = (32 - Math.clz32(n));
release || assert (bitCount <= 32, bitCount);
var l = Math.ceil(bitCount / 6);
var a = arrays[l];
// Encode length followed by six bit chunks.
a[0] = e[l];
for (var i = l - 1, j = 1; i >= 0; i--) {
var offset = (i * 6);
a[j++] = e[(n >> offset) & 0x3F];
}
var s = a.join("");
return s;
}
export function toEncoding(n) {
return _encoding[n];
}
export function fromEncoding(s) {
var c = s.charCodeAt(0);
var e = 0;
if (c >= 65 && c <= 90) {
return c - 65;
} else if (c >= 97 && c <= 122) {
return c - 71;
} else if (c >= 48 && c <= 57) {
return c + 4;
} else if (c === 36) {
return 62;
} else if (c === 95) {
return 63;
}
release || assert (false, "Invalid Encoding");
}
export function variableLengthDecodeInt32(s) {
var l = StringUtilities.fromEncoding(s[0]);
var n = 0;
for (var i = 0; i < l; i++) {
var offset = ((l - i - 1) * 6);
n |= StringUtilities.fromEncoding(s[1 + i]) << offset;
}
return n;
}
export function trimMiddle(s: string, maxLength: number): string {
if (s.length <= maxLength) {
return s;
}
var leftHalf = maxLength >> 1;
var rightHalf = maxLength - leftHalf - 1;
return s.substr(0, leftHalf) + "\u2026" + s.substr(s.length - rightHalf, rightHalf);
}
export function multiple(s: string, count: number): string {
var o = "";
for (var i = 0; i < count; i++) {
o += s;
}
return o;
}
export function indexOfAny(s: string, chars: string [], position: number) {
var index = s.length;
for (var i = 0; i < chars.length; i++) {
var j = s.indexOf(chars[i], position);
if (j >= 0) {
index = Math.min(index, j);
}
}
return index === s.length ? -1 : index;
}
var _concat3array = new Array(3);
var _concat4array = new Array(4);
var _concat5array = new Array(5);
var _concat6array = new Array(6);
var _concat7array = new Array(7);
var _concat8array = new Array(8);
var _concat9array = new Array(9);
/**
* The concatN() functions concatenate multiple strings in a way that
* avoids creating intermediate strings, unlike String.prototype.concat().
*
* Note that these functions don't have identical behaviour to using '+',
* because they will ignore any arguments that are |undefined| or |null|.
* This usually doesn't matter.
*/
export function concat3(s0: any, s1: any, s2: any) {
_concat3array[0] = s0;
_concat3array[1] = s1;
_concat3array[2] = s2;
return _concat3array.join('');
}
export function concat4(s0: any, s1: any, s2: any, s3: any) {
_concat4array[0] = s0;
_concat4array[1] = s1;
_concat4array[2] = s2;
_concat4array[3] = s3;
return _concat4array.join('');
}
export function concat5(s0: any, s1: any, s2: any, s3: any, s4: any) {
_concat5array[0] = s0;
_concat5array[1] = s1;
_concat5array[2] = s2;
_concat5array[3] = s3;
_concat5array[4] = s4;
return _concat5array.join('');
}
}
export module HashUtilities {
// Copyright (c) 2011 Gary Court
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// https://github.com/garycourt/murmurhash-js
export function hashBytesTo32BitsMurmur(data: Uint8Array, offset: number, length: number) {
var l = length, h = 0x12345678 ^ l, i = offset, k;
while (l >= 4) {
k =
(data[i]) |
(data[++i] << 8) |
(data[++i] << 16) |
(data[++i] << 24);
k = (((k & 0xffff) * 0x5bd1e995) + ((((k >>> 16) * 0x5bd1e995) & 0xffff) << 16));
k ^= k >>> 24;
k = (((k & 0xffff) * 0x5bd1e995) + ((((k >>> 16) * 0x5bd1e995) & 0xffff) << 16));
h = (((h & 0xffff) * 0x5bd1e995) + ((((h >>> 16) * 0x5bd1e995) & 0xffff) << 16)) ^ k;
l -= 4;
++i;
}
switch (l) {
case 3: h ^= data[i + 2] << 16;
case 2: h ^= data[i + 1] << 8;
case 1: h ^= data[i];
h = (((h & 0xffff) * 0x5bd1e995) + ((((h >>> 16) * 0x5bd1e995) & 0xffff) << 16));
}
h ^= h >>> 13;
h = (((h & 0xffff) * 0x5bd1e995) + ((((h >>> 16) * 0x5bd1e995) & 0xffff) << 16));
h ^= h >>> 15;
return h >>> 0;
}
// end of imported section
export function hashBytesTo32BitsAdler(data: Uint8Array, offset: number, length: number): number {
var a = 1;
var b = 0;
var end = offset + length;
for (var i = offset; i < end; ++i) {
a = (a + (data[i] & 0xff)) % 65521;
b = (b + a) % 65521;
}
return (b << 16) | a;
}
}
/**
* Marsaglia's algorithm, adapted from V8. Use this if you want a deterministic random number.
*/
export class Random {
private static _state: Uint32Array = new Uint32Array([0xDEAD, 0xBEEF]);
public static seed(seed: number) {
Random._state[0] = seed;
Random._state[1] = seed;
}
public static next(): number {
var s = this._state;
var r0 = (Math.imul(18273, s[0] & 0xFFFF) + (s[0] >>> 16)) | 0;
s[0] = r0;
var r1 = (Math.imul(36969, s[1] & 0xFFFF) + (s[1] >>> 16)) | 0;
s[1] = r1;
var x = ((r0 << 16) + (r1 & 0xFFFF)) | 0;
// Division by 0x100000000 through multiplication by reciprocal.
return (x < 0 ? (x + 0x100000000) : x) * 2.3283064365386962890625e-10;
}
}
Math.random = function random(): number {
return Random.next();
};
export module NumberUtilities {
export function pow2(exponent: number): number {
if (exponent === (exponent | 0)) {
if (exponent < 0) {
return 1 / (1 << -exponent);
}
return 1 << exponent;
}
return Math.pow(2, exponent);
}
export function clamp(value: number, min: number, max: number) {
return Math.max(min, Math.min(max, value));
}
/**
* Rounds *.5 to the nearest even number.
* See https://en.wikipedia.org/wiki/Rounding#Round_half_to_even for details.
*/
export function roundHalfEven(value: number): number {
if (Math.abs(value % 1) === 0.5) {
var floor = Math.floor(value);
return floor % 2 === 0 ? floor : Math.ceil(value);
}
return Math.round(value);
}
export function epsilonEquals(value: number, other: number): boolean {
return Math.abs(value - other) < 0.0000001;
}
}
export enum Numbers {
MaxU16 = 0xFFFF,
MaxI16 = 0x7FFF,
MinI16 = -0x8000
}
export module IntegerUtilities {
var sharedBuffer = new ArrayBuffer(8);
export var i8 = new Int8Array(sharedBuffer);
export var u8 = new Uint8Array(sharedBuffer);
export var i32 = new Int32Array(sharedBuffer);
export var f32 = new Float32Array(sharedBuffer);
export var f64 = new Float64Array(sharedBuffer);
export var nativeLittleEndian = new Int8Array(new Int32Array([1]).buffer)[0] === 1;
/**
* Convert a float into 32 bits.
*/
export function floatToInt32(v: number) {
f32[0] = v; return i32[0];
}
/**
* Convert 32 bits into a float.
*/
export function int32ToFloat(i: number) {
i32[0] = i; return f32[0];
}
export function int64ToDouble(high: number, low: number) {
i32[0] = low; i32[1] = high; return f64[0];
}
/**
* Swap the bytes of a 16 bit number.
*/
export function swap16(i: number) {
return ((i & 0xFF) << 8) | ((i >> 8) & 0xFF);
}
/**
* Swap the bytes of a 32 bit number.
*/
export function swap32(i: number) {
return ((i & 0xFF) << 24) | ((i & 0xFF00) << 8) | ((i >> 8) & 0xFF00) | ((i >> 24) & 0xFF);
}
/**
* Converts a number to s8.u8 fixed point representation.
*/
export function toS8U8(v: number) {
return ((v * 256) << 16) >> 16;
}
/**
* Converts a number from s8.u8 fixed point representation.
*/
export function fromS8U8(i: number) {
return i / 256;
}
/**
* Round trips a number through s8.u8 conversion.
*/
export function clampS8U8(v: number) {
return fromS8U8(toS8U8(v));
}
/**
* Converts a number to signed 16 bits.
*/
export function toS16(v: number) {
return (v << 16) >> 16;
}
export function bitCount(i: number): number {
i = i - ((i >> 1) & 0x55555555);
i = (i & 0x33333333) + ((i >> 2) & 0x33333333);
return (((i + (i >> 4)) & 0x0F0F0F0F) * 0x01010101) >> 24;
}
export function ones(i: number): number {
i = i - ((i >> 1) & 0x55555555);
i = (i & 0x33333333) + ((i >> 2) & 0x33333333);
return ((i + (i >> 4) & 0xF0F0F0F) * 0x1010101) >> 24;
}
export function trailingZeros(i: number): number {
return IntegerUtilities.ones((i & -i) - 1);
}
export function getFlags(i: number, flags: string[]): string {
var str = "";
for (var i = 0; i < flags.length; i++) {
if (i & (1 << i)) {
str += flags[i] + " ";
}
}
if (str.length === 0) {
return "";
}
return str.trim();
}
export function isPowerOfTwo(x: number) {
return x && ((x & (x - 1)) === 0);
}
export function roundToMultipleOfFour(x: number) {
return (x + 3) & ~0x3;
}
export function nearestPowerOfTwo(x: number) {
x --;
x |= x >> 1;
x |= x >> 2;
x |= x >> 4;
x |= x >> 8;
x |= x >> 16;
x ++;
return x;
}
export function roundToMultipleOfPowerOfTwo(i: number, powerOfTwo: number) {
var x = (1 << powerOfTwo) - 1;
return (i + x) & ~x; // Round up to multiple of power of two.
}
/**
* Polyfill imul.
*/
if (!Math.imul) {
Math.imul = function imul(a, b) {
var ah = (a >>> 16) & 0xffff;
var al = a & 0xffff;
var bh = (b >>> 16) & 0xffff;
var bl = b & 0xffff;
// the shift by 0 fixes the sign on the high part
// the final |0 converts the unsigned value into a signed value
return ((al * bl) + (((ah * bl + al * bh) << 16) >>> 0) | 0);
}
}
/**
* Polyfill clz32.
*/
if (!Math.clz32) {
Math.clz32 = function clz32(i: number) {
i |= (i >> 1);
i |= (i >> 2);
i |= (i >> 4);
i |= (i >> 8);
i |= (i >> 16);
return 32 - IntegerUtilities.ones(i);
}
}
}
export enum LogLevel {
Error = 0x1,
Warn = 0x2,
Debug = 0x4,
Log = 0x8,
Info = 0x10,
All = 0x1f
}
export class IndentingWriter {
public static PURPLE = '\033[94m';
public static YELLOW = '\033[93m';
public static GREEN = '\033[92m';
public static RED = '\033[91m';
public static BOLD_RED = '\033[1;91m';
public static ENDC = '\033[0m';
public static logLevel: LogLevel = LogLevel.All;
public static stdout = inBrowser ? console.info.bind(console) : print;
public static stdoutNoNewline = inBrowser ? console.info.bind(console) : putstr;
public static stderr = inBrowser ? console.error.bind(console) : printErr;
private _tab: string;
private _padding: string;
private _suppressOutput: boolean;
private _out: (s: string) => void;
private _outNoNewline: (s: string) => void;
constructor(suppressOutput: boolean = false, out?) {
this._tab = " ";
this._padding = "";
this._suppressOutput = suppressOutput;
this._out = out || IndentingWriter.stdout;
this._outNoNewline = out || IndentingWriter.stdoutNoNewline;
}
write(str: string = "", writePadding = false) {
if (!this._suppressOutput) {
this._outNoNewline((writePadding ? this._padding : "") + str);
}
}
writeLn(str: string = "") {
if (!this._suppressOutput) {
this._out(this._padding + str);
}
}
writeTimeLn(str: string = "") {
if (!this._suppressOutput) {
this._out(this._padding + performance.now().toFixed(2) + " " + str);
}
}
writeComment(str: string) {
var lines = str.split("\n");
if (lines.length === 1) {
this.writeLn("// " + lines[0]);
} else {
this.writeLn("/**");
for (var i = 0; i < lines.length; i++) {
this.writeLn(" * " + lines[i]);
}
this.writeLn(" */");
}
}
writeLns(str: string) {
var lines = str.split("\n");
for (var i = 0; i < lines.length; i++) {
this.writeLn(lines[i]);
}
}
errorLn(str: string) {
if (IndentingWriter.logLevel & LogLevel.Error) {
this.boldRedLn(str);
}
}
warnLn(str: string) {
if (IndentingWriter.logLevel & LogLevel.Warn) {
this.yellowLn(str);
}
}
debugLn(str: string) {
if (IndentingWriter.logLevel & LogLevel.Debug) {
this.purpleLn(str);
}
}
logLn(str: string) {
if (IndentingWriter.logLevel & LogLevel.Log) {
this.writeLn(str);
}
}
infoLn(str: string) {
if (IndentingWriter.logLevel & LogLevel.Info) {
this.writeLn(str);
}
}
yellowLn(str: string) {
this.colorLn(IndentingWriter.YELLOW, str);
}
greenLn(str: string) {
this.colorLn(IndentingWriter.GREEN, str);
}
boldRedLn(str: string) {
this.colorLn(IndentingWriter.BOLD_RED, str);
}
redLn(str: string) {
this.colorLn(IndentingWriter.RED, str);
}
purpleLn(str: string) {
this.colorLn(IndentingWriter.PURPLE, str);
}
colorLn(color: string, str: string) {
if (!this._suppressOutput) {
if (!inBrowser) {
this._out(this._padding + color + str + IndentingWriter.ENDC);
} else {
this._out(this._padding + str);
}
}
}
redLns(str: string) {
this.colorLns(IndentingWriter.RED, str);
}
colorLns(color: string, str: string) {
var lines = str.split("\n");
for (var i = 0; i < lines.length; i++) {
this.colorLn(color, lines[i]);
}
}
enter(str: string) {
if (!this._suppressOutput) {
this._out(this._padding + str);
}
this.indent();
}
leaveAndEnter(str: string) {
this.leave(str);
this.indent();
}
leave(str: string) {
this.outdent();
if (!this._suppressOutput) {
this._out(this._padding + str);
}
}
indent() {
this._padding += this._tab;
}
outdent() {
if (this._padding.length > 0) {
this._padding = this._padding.substring(0, this._padding.length - this._tab.length);
}
}
writeArray(arr: any[], detailed: boolean = false, noNumbers: boolean = false) {
detailed = detailed || false;
for (var i = 0, j = arr.length; i < j; i++) {
var prefix = "";
if (detailed) {
if (arr[i] === null) {
prefix = "null";
} else if (arr[i] === undefined) {
prefix = "undefined";
} else {
prefix = arr[i].constructor.name;
}
prefix += " ";
}
var number = noNumbers ? "" : ("" + i).padRight(' ', 4);
this.writeLn(number + prefix + arr[i]);
}
}
}
/**
* Insertion sort SortedList backed by a linked list.
*/
class SortedListNode<T> {
value: T;
next: SortedListNode<T>;
constructor(value: T, next: SortedListNode<T>) {
this.value = value;
this.next = next;
}
}
export class SortedList<T> {
public static RETURN = 1;
public static DELETE = 2;
private _compare: (l: T, r: T) => number;
private _head: SortedListNode<T>;
private _length: number;
constructor (compare: (l: T, r: T) => number) {
release || Debug.assert(compare);
this._compare = compare;
this._head = null;
this._length = 0;
}
public push(value: T) {
release || Debug.assert(value !== undefined);
this._length ++;
if (!this._head) {
this._head = new SortedListNode<T>(value, null);
return;
}
var curr = this._head;
var prev = null;
var node = new SortedListNode<T>(value, null);
var compare = this._compare;
while (curr) {
if (compare(curr.value, node.value) > 0) {
if (prev) {
node.next = curr;
prev.next = node;
} else {
node.next = this._head;
this._head = node;
}
return;
}
prev = curr;
curr = curr.next;
}
prev.next = node;
}
/**
* Visitors can return RETURN if they wish to stop the iteration or DELETE if they need to delete the current node.
* NOTE: DELETE most likley doesn't work if there are multiple active iterations going on.
*/
public forEach(visitor: (value: T) => any) {
var curr = this._head;
var last = null;
while (curr) {
var result = visitor(curr.value);
if (result === SortedList.RETURN) {
return;
} else if (result === SortedList.DELETE) {
if (!last) {
curr = this._head = this._head.next;
} else {
curr = last.next = curr.next;
}
} else {
last = curr;
curr = curr.next;
}
}
}
public isEmpty(): boolean {
return !this._head;
}
public pop(): T {
if (!this._head) {
return undefined;
}
this._length --;
var ret = this._head;
this._head = this._head.next;
return ret.value;
}
public contains(value: T): boolean {
var curr = this._head;
while (curr) {
if (curr.value === value) {
return true;
}
curr = curr.next;
}
return false;
}
public toString(): string {
var str = "[";
var curr = this._head;
while (curr) {
str += curr.value.toString();
curr = curr.next;
if (curr) {
str += ",";
}
}
str += "]";
return str;
}
}
export module BitSets {
import assert = Debug.assert;
export var ADDRESS_BITS_PER_WORD = 5;
export var BITS_PER_WORD = 1 << ADDRESS_BITS_PER_WORD;
export var BIT_INDEX_MASK = BITS_PER_WORD - 1;
function getSize(length): number {
return ((length + (BITS_PER_WORD - 1)) >> ADDRESS_BITS_PER_WORD) << ADDRESS_BITS_PER_WORD;
}
export interface BitSet {
set: (i) => void;
setAll: () => void;
assign: (set: BitSet) => void;
clear: (i: number) => void;
get: (i: number) => boolean;
clearAll: () => void;
intersect: (other: BitSet) => void;
subtract: (other: BitSet) => void;
negate: () => void;
forEach: (fn) => void;
toArray: () => boolean [];
equals: (other: BitSet) => boolean;
contains: (other: BitSet) => boolean;
isEmpty: () => boolean;
clone: () => BitSet;
recount: () => void;
toString: (names: string []) => string;
toBitString: (on: string, off: string) => string;
}
function toBitString(on: string, off: string) {
var self: BitSet = this;
on = on || "1";
off = off || "0";
var str = "";
for (var i = 0; i < length; i++) {
str += self.get(i) ? on : off;
}
return str;
}
function toString(names: any[]) {
var self: BitSet = this;
var set = [];
for (var i = 0; i < length; i++) {
if (self.get(i)) {
set.push(names ? names[i] : i);
}
}
return set.join(", ");
}
export class Uint32ArrayBitSet implements BitSet {
size: number;
bits: Uint32Array;
count: number;
dirty: number;
length: number;
constructor(length: number) {
this.size = getSize(length);
this.count = 0;
this.dirty = 0;
this.length = length;
this.bits = new Uint32Array(this.size >> ADDRESS_BITS_PER_WORD);
}
recount() {
if (!this.dirty) {
return;
}
var bits = this.bits;
var c = 0;
for (var i = 0, j = bits.length; i < j; i++) {
var v = bits[i];
v = v - ((v >> 1) & 0x55555555);
v = (v & 0x33333333) + ((v >> 2) & 0x33333333);
c += ((v + (v >> 4) & 0xF0F0F0F) * 0x1010101) >> 24;
}
this.count = c;
this.dirty = 0;
}
set(i) {
var n = i >> ADDRESS_BITS_PER_WORD;
var old = this.bits[n];
var b = old | (1 << (i & BIT_INDEX_MASK));
this.bits[n] = b;
this.dirty |= old ^ b;
}
setAll() {
var bits = this.bits;
for (var i = 0, j = bits.length; i < j; i++) {
bits[i] = 0xFFFFFFFF;
}
this.count = this.size;
this.dirty = 0;
}
assign(set) {
this.count = set.count;
this.dirty = set.dirty;
this.size = set.size;
for (var i = 0, j = this.bits.length; i < j; i++) {
this.bits[i] = set.bits[i];
}
}
nextSetBit(from: number, to: number): number {
if (from === to) {
return -1;
}
var bits = this.bits;
for (var i = from; i < to; i++) {
var word = bits[i >> ADDRESS_BITS_PER_WORD];
if (((word & 1 << (i & BIT_INDEX_MASK))) !== 0) {
return i;
}
}
}
clear(i) {
var n = i >> ADDRESS_BITS_PER_WORD;
var old = this.bits[n];
var b = old & ~(1 << (i & BIT_INDEX_MASK));
this.bits[n] = b;
this.dirty |= old ^ b;
}
get(i): boolean {
var word = this.bits[i >> ADDRESS_BITS_PER_WORD];
return ((word & 1 << (i & BIT_INDEX_MASK))) !== 0;
}
clearAll() {
var bits = this.bits;
for (var i = 0, j = bits.length; i < j; i++) {
bits[i] = 0;
}
this.count = 0;
this.dirty = 0;
}
private _union(other: Uint32ArrayBitSet) {
var dirty = this.dirty;
var bits = this.bits;
var otherBits = other.bits;
for (var i = 0, j = bits.length; i < j; i++) {
var old = bits[i];
var b = old | otherBits[i];
bits[i] = b;
dirty |= old ^ b;
}
this.dirty = dirty;
}
intersect(other: Uint32ArrayBitSet) {
var dirty = this.dirty;
var bits = this.bits;
var otherBits = other.bits;
for (var i = 0, j = bits.length; i < j; i++) {
var old = bits[i];
var b = old & otherBits[i];
bits[i] = b;
dirty |= old ^ b;
}
this.dirty = dirty;
}
subtract(other: Uint32ArrayBitSet) {
var dirty = this.dirty;
var bits = this.bits;
var otherBits = other.bits;
for (var i = 0, j = bits.length; i < j; i++) {
var old = bits[i];
var b = old & ~otherBits[i];
bits[i] = b;
dirty |= old ^ b;
}
this.dirty = dirty;
}
negate() {
var dirty = this.dirty;
var bits = this.bits;
for (var i = 0, j = bits.length; i < j; i++) {
var old = bits[i];
var b = ~old;
bits[i] = b;
dirty |= old ^ b;
}
this.dirty = dirty;
}
forEach(fn) {
release || assert(fn);
var bits = this.bits;
for (var i = 0, j = bits.length; i < j; i++) {
var word = bits[i];
if (word) {
for (var k = 0; k < BITS_PER_WORD; k++) {
if (word & (1 << k)) {
fn(i * BITS_PER_WORD + k);
}
}
}
}
}
toArray(): boolean[] {
var set = [];
var bits = this.bits;
for (var i = 0, j = bits.length; i < j; i++) {
var word = bits[i];
if (word) {
for (var k = 0; k < BITS_PER_WORD; k++) {
if (word & (1 << k)) {
set.push(i * BITS_PER_WORD + k);
}
}
}
}
return set;
}
equals(other: Uint32ArrayBitSet) {
if (this.size !== other.size) {
return false;
}
var bits = this.bits;
var otherBits = other.bits;
for (var i = 0, j = bits.length; i < j; i++) {
if (bits[i] !== otherBits[i]) {
return false;
}
}
return true;
}
contains(other: Uint32ArrayBitSet) {
if (this.size !== other.size) {
return false;
}
var bits = this.bits;
var otherBits = other.bits;
for (var i = 0, j = bits.length; i < j; i++) {
if ((bits[i] | otherBits[i]) !== bits[i]) {
return false;
}
}
return true;
}
toBitString: (on: string, off: string) => string;
toString: (names: string []) => string;
isEmpty(): boolean {
this.recount();
return this.count === 0;
}
clone(): Uint32ArrayBitSet {
var set = new Uint32ArrayBitSet(this.length);
set._union(this);
return set;
}
}
export class Uint32BitSet implements BitSet {
size: number;
bits: number;
count: number;
dirty: number;
singleWord: boolean;
length: number;
constructor(length: number) {
this.count = 0;
this.dirty = 0;
this.size = getSize(length);
this.bits = 0;
this.singleWord = true;
this.length = length;
}
recount() {
if (!this.dirty) {
return;
}
var c = 0;
var v = this.bits;
v = v - ((v >> 1) & 0x55555555);
v = (v & 0x33333333) + ((v >> 2) & 0x33333333);
c += ((v + (v >> 4) & 0xF0F0F0F) * 0x1010101) >> 24;
this.count = c;
this.dirty = 0;
}
set(i) {
var old = this.bits;
var b = old | (1 << (i & BIT_INDEX_MASK));
this.bits = b;
this.dirty |= old ^ b;
}
setAll() {
this.bits = 0xFFFFFFFF;
this.count = this.size;
this.dirty = 0;
}
assign(set: Uint32BitSet) {
this.count = set.count;
this.dirty = set.dirty;
this.size = set.size;
this.bits = set.bits;
}
clear(i: number) {
var old = this.bits;
var b = old & ~(1 << (i & BIT_INDEX_MASK));
this.bits = b;
this.dirty |= old ^ b;
}
get(i: number): boolean {
return ((this.bits & 1 << (i & BIT_INDEX_MASK))) !== 0;
}
clearAll() {
this.bits = 0;
this.count = 0;
this.dirty = 0;
}
private _union(other: Uint32BitSet) {
var old = this.bits;
var b = old | other.bits;
this.bits = b;
this.dirty = old ^ b;
}
intersect(other: Uint32BitSet) {
var old = this.bits;
var b = old & other.bits;
this.bits = b;
this.dirty = old ^ b;
}
subtract(other: Uint32BitSet) {
var old = this.bits;
var b = old & ~other.bits;
this.bits = b;
this.dirty = old ^ b;
}
negate() {
var old = this.bits;
var b = ~old;
this.bits = b;
this.dirty = old ^ b;
}
forEach(fn) {
release || assert(fn);
var word = this.bits;
if (word) {
for (var k = 0; k < BITS_PER_WORD; k++) {
if (word & (1 << k)) {
fn(k);
}
}
}
}
toArray(): boolean [] {
var set = [];
var word = this.bits;
if (word) {
for (var k = 0; k < BITS_PER_WORD; k++) {
if (word & (1 << k)) {
set.push(k);
}
}
}
return set;
}
equals(other: Uint32BitSet) {
return this.bits === other.bits;
}
contains(other: Uint32BitSet) {
var bits = this.bits;
return (bits | other.bits) === bits;
}
toBitString: (on: string, off: string) => string;
toString: (names: string []) => string;
isEmpty(): boolean {
this.recount();
return this.count === 0;
}
clone(): Uint32BitSet {
var set = new Uint32BitSet(this.length);
set._union(this);
return set;
}
}
Uint32BitSet.prototype.toString = toString;
Uint32BitSet.prototype.toBitString = toBitString;
Uint32ArrayBitSet.prototype.toString = toString;
Uint32ArrayBitSet.prototype.toBitString = toBitString;
export function BitSetFunctor(length: number) {
var shouldUseSingleWord = (getSize(length) >> ADDRESS_BITS_PER_WORD) === 1;
var type = (shouldUseSingleWord ? <any>Uint32BitSet : <any>Uint32ArrayBitSet);
return function () {
return new type(length);
}
}
}
/**
* Simple pool allocator for ArrayBuffers. This reduces memory usage in data structures
* that resize buffers.
*/
export class ArrayBufferPool {
private _list: ArrayBuffer [];
private _maxSize: number;
private static _enabled = true;
/**
* Creates a pool that manages a pool of a |maxSize| number of array buffers.
*/
constructor(maxSize: number = 32) {
this._list = [];
this._maxSize = maxSize;
}
/**
* Creates or reuses an existing array buffer that is at least the
* specified |length|.
*/
public acquire(length: number): ArrayBuffer {
if (ArrayBufferPool._enabled) {
var list = this._list;
for (var i = 0; i < list.length; i++) {
var buffer = list[i];
if (buffer.byteLength >= length) {
list.splice(i, 1);
return buffer;
}
}
}
return new ArrayBuffer(length);
}
/**
* Releases an array buffer that is no longer needed back to the pool.
*/
public release(buffer: ArrayBuffer) {
if (ArrayBufferPool._enabled) {
var list = this._list;
release || Debug.assert(ArrayUtilities.indexOf(list, buffer) < 0);
if (list.length === this._maxSize) {
list.shift();
}
list.push(buffer);
}
}
/**
* Resizes a Uint8Array to have the given length.
*/
public ensureUint8ArrayLength(array: Uint8Array, length: number): Uint8Array {
if (array.length >= length) {
return array;
}
var newLength = Math.max(array.length + length, ((array.length * 3) >> 1) + 1);
var newArray = new Uint8Array(this.acquire(newLength), 0, newLength);
newArray.set(array);
this.release(array.buffer);
return newArray;
}
/**
* Resizes a Float64Array to have the given length.
*/
public ensureFloat64ArrayLength(array: Float64Array, length: number): Float64Array {
if (array.length >= length) {
return array;
}
var newLength = Math.max(array.length + length, ((array.length * 3) >> 1) + 1);
var newArray = new Float64Array(this.acquire(newLength * Float64Array.BYTES_PER_ELEMENT), 0, newLength);
newArray.set(array);
this.release(array.buffer);
return newArray;
}
}
}
/**
* Extend builtin prototypes.
*
* TODO: Go through the code and remove all references to these.
*/
(function () {
function extendBuiltin(prototype, property, value) {
if (!prototype[property]) {
Object.defineProperty(prototype, property,
{ value: value,
writable: true,
configurable: true,
enumerable: false });
}
}
function removeColors(s) {
return s.replace(/\033\[[0-9]*m/g, "");
}
extendBuiltin(String.prototype, "padRight", function (c, n) {
var str = this;
var length = removeColors(str).length;
if (!c || length >= n) {
return str;
}
var max = (n - length) / c.length;
for (var i = 0; i < max; i++) {
str += c;
}
return str;
});
extendBuiltin(String.prototype, "padLeft", function (c, n) {
var str = this;
var length = str.length;
if (!c || length >= n) {
return str;
}
var max = (n - length) / c.length;
for (var i = 0; i < max; i++) {
str = c + str;
}
return str;
});
extendBuiltin(String.prototype, "trim", function () {
return this.replace(/^\s+|\s+$/g,"");
});
extendBuiltin(String.prototype, "endsWith", function (str) {
return this.indexOf(str, this.length - str.length) !== -1;
});
extendBuiltin(Array.prototype, "replace", function(x, y) {
if (x === y) {
return 0;
}
var count = 0;
for (var i = 0; i < this.length; i++) {
if (this[i] === x) {
this[i] = y;
count ++;
}
}
return count;
});
})();