echogarden/dist/utilities/StringBuilder.js

An easy-to-use speech toolset. Includes tools for synthesis, recognition, alignment, speech translation, language detection, source separation and more.

import { createDynamicUint16Array } from '../data-structures/DynamicTypedArray.js';
import { decodeUtf16 } from '../encodings/Utf16.js';
export class StringBuilder {
    outputBuffer;
    constructor(initialCapacity = 8) {
        this.outputBuffer = createDynamicUint16Array(initialCapacity);
    }
    appendCharCode(charCode) {
        this.outputBuffer.add(charCode);
    }
    appendCharCodes(...charCodes) {
        this.outputBuffer.addArray(charCodes);
    }
    appendCharCodeArray(charCodes) {
        this.outputBuffer.addArray(charCodes);
    }
    appendString(str) {
        const length = str.length;
        for (let i = 0; i < length; i++) {
            this.appendCharCode(str.charCodeAt(i));
        }
    }
    appendCodePoint(codePoint) {
        if (codePoint <= 0xffff) {
            this.appendCharCode(codePoint);
        }
        else if (codePoint <= 0x10ffff) {
            this.appendCharCode(0xd800 + ((codePoint - 0x10000) >>> 10));
            this.appendCharCode(0xdc00 + ((codePoint - 0x10000) & 1023));
        }
        else {
            throw new Error(`appendCodePoint: A code point of ${codePoint} cannot be encoded in UTF-16`);
        }
    }
    toString() {
        return decodeUtf16(this.outputBuffer.toTypedArray());
    }
}
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