62 lines
2.1 KiB
JavaScript
62 lines
2.1 KiB
JavaScript
/*
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* Copyright (C) 2021 Yomichan Authors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/**
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* Class containing generic string utility functions.
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*/
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class StringUtil {
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/**
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* Decodes the contents of an ArrayBuffer using UTF8.
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* @param arrayBuffer The input ArrayBuffer.
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* @returns A UTF8-decoded string.
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*/
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static arrayBufferUtf8Decode(arrayBuffer) {
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try {
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return new TextDecoder('utf-8').decode(arrayBuffer);
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} catch (e) {
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return decodeURIComponent(escape(this.arrayBufferToBinaryString(arrayBuffer)));
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}
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}
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/**
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* Converts the contents of an ArrayBuffer to a base64 string.
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* @param arrayBuffer The input ArrayBuffer.
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* @returns A base64 string representing the binary content.
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*/
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static arrayBufferToBase64(arrayBuffer) {
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return btoa(this.arrayBufferToBinaryString(arrayBuffer));
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}
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/**
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* Converts the contents of an ArrayBuffer to a binary string.
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* @param arrayBuffer The input ArrayBuffer.
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* @returns A string representing the binary content.
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*/
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static arrayBufferToBinaryString(arrayBuffer) {
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const bytes = new Uint8Array(arrayBuffer);
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try {
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return String.fromCharCode(...bytes);
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} catch (e) {
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let binary = '';
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for (let i = 0, ii = bytes.byteLength; i < ii; ++i) {
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binary += String.fromCharCode(bytes[i]);
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}
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return binary;
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}
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}
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}
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