51161498

Committed 13 Dec 2024 04:24AM UTC coverage: 92.554%. Remained the same

Build # 51161498

Build Type

push

appveyor

Committed by

benrr101

Commit Message

Merge branch 'release/v6.0.1' into develop

Run Details

3251 of 4131 branches covered (78.7%)

Branch coverage included in aggregate %.

26753 of 28287 relevant lines covered (94.58%)

471.62 hits per line

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10.0

/src/mpeg4/descriptorTagReader.ts

import { ByteVector } from "../byteVector";
import {Guards, NumberUtils} from "../utils";

/**
 * Provides methods to read descriptor tags
 * @internal
 */
export class DescriptorTagReader {
    private _data: ByteVector;
    private _length: number;
    private _offset: number;

    /**
     * Constructs and initializes a new descriptor tag reader with the data from which to read the
     * descriptor tag.
     * @param data Data from which the descriptor tag should be read
     */
    public constructor(data: ByteVector) {
        Guards.truthy(data, "data");

        this._data = data;
        this._length = 0;
        this._offset = 0;
    }

    /**
     * Gets the length of the descriptor tag.
     */
    public get length(): number { return this._length; }

    /**
     * Gets the offset of the descriptor tag.
     */
    public get offset(): number { return this._offset; }

    /**
     * Reads a section length and updates the offset to the end of the length block.
     * @returns number Length that was read.
     */
    public readLength(): number {
        let b = 0;
        const end = this._offset + 4;

        do {
            b = this._data.get(this._offset++);
            this._length = NumberUtils.uintOr(NumberUtils.uintLShift(this._length, 7), NumberUtils.uintAnd(b, 0x7f));
        } while (NumberUtils.uintAnd(b, 0x80) !== 0 && this._offset <= end);
        // The length could be between 1 and 4 bytes for each descriptor

        return this._length;
    }

    /**
     * Increases the current offset by a given value
     * @param value A number by which the offset should be increased
     * @returns number Offset before increase
     */
    public increaseOffset(value: number): number {
        Guards.safeUint(value, "value");

        const previousOffset = this._offset;
        this._offset += value;

        return previousOffset;
    }
}

1	import { ByteVector } from "../byteVector";
2	import {Guards, NumberUtils} from "../utils";	1✔
3
4	/**
5	* Provides methods to read descriptor tags
6	* @internal
7	*/
8	export class DescriptorTagReader {	1✔
9	private _data: ByteVector;
10	private _length: number;
11	private _offset: number;
12
13	/**
14	* Constructs and initializes a new descriptor tag reader with the data from which to read the
15	* descriptor tag.
16	* @param data Data from which the descriptor tag should be read
17	*/
18	public constructor(data: ByteVector) {
19	Guards.truthy(data, "data");	×
20
21	this._data = data;	×
22	this._length = 0;	×
23	this._offset = 0;	×
24	}
25
26	/**
27	* Gets the length of the descriptor tag.
28	*/
29	public get length(): number { return this._length; }	×
30
31	/**
32	* Gets the offset of the descriptor tag.
33	*/
34	public get offset(): number { return this._offset; }	×
35
36	/**
37	* Reads a section length and updates the offset to the end of the length block.
38	* @returns number Length that was read.
39	*/
40	public readLength(): number {
41	let b = 0;	×
42	const end = this._offset + 4;	×
43
44	do {	×
45	b = this._data.get(this._offset++);	×
46	this._length = NumberUtils.uintOr(NumberUtils.uintLShift(this._length, 7), NumberUtils.uintAnd(b, 0x7f));	×
47	} while (NumberUtils.uintAnd(b, 0x80) !== 0 && this._offset <= end);	×
48	// The length could be between 1 and 4 bytes for each descriptor
49
50	return this._length;	×
51	}
52
53	/**
54	* Increases the current offset by a given value
55	* @param value A number by which the offset should be increased
56	* @returns number Offset before increase
57	*/
58	public increaseOffset(value: number): number {
59	Guards.safeUint(value, "value");	×
60
61	const previousOffset = this._offset;	×
62	this._offset += value;	×
63
64	return previousOffset;	×
65	}
66	}

benrr101 / node-taglib-sharp / 51161498

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