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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.BufferTokenizer = void 0;
const peek_readable_1 = require("peek-readable");
const AbstractTokenizer_1 = require("./AbstractTokenizer");
class BufferTokenizer extends AbstractTokenizer_1.AbstractTokenizer {
/**
* Construct BufferTokenizer
* @param uint8Array - Uint8Array to tokenize
* @param fileInfo - Pass additional file information to the tokenizer
*/
constructor(uint8Array, fileInfo) {
super(fileInfo);
this.uint8Array = uint8Array;
this.fileInfo.size = this.fileInfo.size ? this.fileInfo.size : uint8Array.length;
}
/**
* Read buffer from tokenizer
* @param uint8Array - Uint8Array to tokenize
* @param options - Read behaviour options
* @returns {Promise<number>}
*/
async readBuffer(uint8Array, options) {
if (options && options.position) {
if (options.position < this.position) {
throw new Error('`options.position` must be equal or greater than `tokenizer.position`');
}
this.position = options.position;
}
const bytesRead = await this.peekBuffer(uint8Array, options);
this.position += bytesRead;
return bytesRead;
}
/**
* Peek (read ahead) buffer from tokenizer
* @param uint8Array
* @param options - Read behaviour options
* @returns {Promise<number>}
*/
async peekBuffer(uint8Array, options) {
const normOptions = this.normalizeOptions(uint8Array, options);
const bytes2read = Math.min(this.uint8Array.length - normOptions.position, normOptions.length);
if ((!normOptions.mayBeLess) && bytes2read < normOptions.length) {
throw new peek_readable_1.EndOfStreamError();
}
else {
uint8Array.set(this.uint8Array.subarray(normOptions.position, normOptions.position + bytes2read), normOptions.offset);
return bytes2read;
}
}
async close() {
// empty
}
}
exports.BufferTokenizer = BufferTokenizer;