247 lines
5.4 KiB
JavaScript
247 lines
5.4 KiB
JavaScript
"use strict";
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/*global escape, unescape*/
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var isNode = typeof process === 'object' &&
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typeof process.versions === 'object' &&
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process.versions.node &&
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process.__atom_type !== "renderer";
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if (isNode) {
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var nodeRequire = require; // Prevent mine.js from seeing this require
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module.exports = nodeRequire('./bodec-node.js');
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}
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else {
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// This file must be served with UTF-8 encoding for the utf8 codec to work.
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module.exports = {
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Binary: Uint8Array,
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// Utility functions
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isBinary: isBinary,
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create: create,
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join: join,
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// Binary input and output
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copy: copy,
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slice: slice,
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// String input and output
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toRaw: toRaw,
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fromRaw: fromRaw,
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toUnicode: toUnicode,
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fromUnicode: fromUnicode,
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toHex: toHex,
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fromHex: fromHex,
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toBase64: toBase64,
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fromBase64: fromBase64,
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// Array input and output
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toArray: toArray,
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fromArray: fromArray,
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// Raw <-> Hex-encoded codec
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decodeHex: decodeHex,
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encodeHex: encodeHex,
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decodeBase64: decodeBase64,
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encodeBase64: encodeBase64,
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// Unicode <-> Utf8-encoded-raw codec
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encodeUtf8: encodeUtf8,
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decodeUtf8: decodeUtf8,
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// Hex <-> Nibble codec
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nibbleToCode: nibbleToCode,
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codeToNibble: codeToNibble
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};
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}
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function isBinary(value) {
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return value &&
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typeof value === "object" &&
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value instanceof Uint8Array || value.constructor.name === "Uint8Array";
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}
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function create(length) {
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return new Uint8Array(length);
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}
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function join(chunks) {
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var length = chunks.length;
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var total = 0;
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for (var i = 0; i < length; i++) {
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total += chunks[i].length;
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}
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var binary = create(total);
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var offset = 0;
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for (i = 0; i < length; i++) {
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var chunk = chunks[i];
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copy(chunk, binary, offset);
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offset += chunk.length;
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}
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return binary;
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}
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function slice(binary, start, end) {
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if (end === undefined) {
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end = binary.length;
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if (start === undefined) start = 0;
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}
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return binary.subarray(start, end);
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}
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function copy(source, binary, offset) {
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var length = source.length;
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if (offset === undefined) {
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offset = 0;
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if (binary === undefined) binary = create(length);
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}
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for (var i = 0; i < length; i++) {
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binary[i + offset] = source[i];
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}
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return binary;
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}
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// Like slice, but encode as a hex string
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function toHex(binary, start, end) {
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var hex = "";
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if (end === undefined) {
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end = binary.length;
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if (start === undefined) start = 0;
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}
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for (var i = start; i < end; i++) {
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var byte = binary[i];
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hex += String.fromCharCode(nibbleToCode(byte >> 4)) +
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String.fromCharCode(nibbleToCode(byte & 0xf));
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}
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return hex;
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}
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// Like copy, but decode from a hex string
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function fromHex(hex, binary, offset) {
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var length = hex.length / 2;
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if (offset === undefined) {
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offset = 0;
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if (binary === undefined) binary = create(length);
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}
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var j = 0;
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for (var i = 0; i < length; i++) {
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binary[offset + i] = (codeToNibble(hex.charCodeAt(j++)) << 4)
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| codeToNibble(hex.charCodeAt(j++));
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}
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return binary;
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}
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function toBase64(binary, start, end) {
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return btoa(toRaw(binary, start, end));
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}
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function fromBase64(base64, binary, offset) {
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return fromRaw(atob(base64), binary, offset);
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}
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function nibbleToCode(nibble) {
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nibble |= 0;
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return (nibble + (nibble < 10 ? 0x30 : 0x57))|0;
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}
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function codeToNibble(code) {
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code |= 0;
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return (code - ((code & 0x40) ? 0x57 : 0x30))|0;
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}
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function toUnicode(binary, start, end) {
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return decodeUtf8(toRaw(binary, start, end));
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}
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function fromUnicode(unicode, binary, offset) {
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return fromRaw(encodeUtf8(unicode), binary, offset);
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}
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function decodeHex(hex) {
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var j = 0, l = hex.length;
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var raw = "";
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while (j < l) {
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raw += String.fromCharCode(
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(codeToNibble(hex.charCodeAt(j++)) << 4)
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| codeToNibble(hex.charCodeAt(j++))
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);
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}
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return raw;
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}
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function encodeHex(raw) {
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var hex = "";
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var length = raw.length;
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for (var i = 0; i < length; i++) {
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var byte = raw.charCodeAt(i);
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hex += String.fromCharCode(nibbleToCode(byte >> 4)) +
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String.fromCharCode(nibbleToCode(byte & 0xf));
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}
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return hex;
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}
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function decodeBase64(base64) {
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return atob(base64);
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}
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function encodeBase64(raw) {
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return btoa(raw);
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}
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function decodeUtf8(utf8) {
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return decodeURIComponent(escape(utf8));
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}
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function encodeUtf8(unicode) {
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return unescape(encodeURIComponent(unicode));
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}
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function toRaw(binary, start, end) {
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var raw = "";
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if (end === undefined) {
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end = binary.length;
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if (start === undefined) start = 0;
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}
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for (var i = start; i < end; i++) {
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raw += String.fromCharCode(binary[i]);
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}
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return raw;
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}
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function fromRaw(raw, binary, offset) {
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var length = raw.length;
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if (offset === undefined) {
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offset = 0;
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if (binary === undefined) binary = create(length);
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}
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for (var i = 0; i < length; i++) {
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binary[offset + i] = raw.charCodeAt(i);
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}
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return binary;
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}
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function toArray(binary, start, end) {
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if (end === undefined) {
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end = binary.length;
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if (start === undefined) start = 0;
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}
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var length = end - start;
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var array = new Array(length);
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for (var i = 0; i < length; i++) {
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array[i] = binary[i + start];
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}
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return array;
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}
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function fromArray(array, binary, offset) {
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var length = array.length;
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if (offset === undefined) {
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offset = 0;
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if (binary === undefined) binary = create(length);
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}
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for (var i = 0; i < length; i++) {
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binary[offset + i] = array[i];
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}
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return binary;
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}
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