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/* |
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* Copyright (c) 2017-2018 Rafael da Silva Rocha. |
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* https://github.com/rochars/byte-data |
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* |
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*/ |
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/** |
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* @type {!Object} |
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* @private |
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*/ |
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const packer = require("./lib/packer"); |
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/** |
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* Write a number or fixed-length string to a byte buffer. |
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* @param {number|string} value The value. |
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* @param {!Object} theType The type definition. |
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* @return {!Array<number|string>} |
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* @throws {Error} If the type definition is not valid. |
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*/ |
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function pack(value, theType) { |
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packer.setUp(theType); |
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return packer.toBytes( |
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[packer.fixBadString(value, theType)], theType); |
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} |
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/** |
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* Read a number or a fixed-length string from a byte buffer. |
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* @param {!Array<number|string>|!Uint8Array} buffer An array of bytes. |
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* @param {!Object} theType The type definition. |
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* @return {number|string|null} |
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* @throws {Error} If the type definition is not valid. |
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*/ |
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function unpack(buffer, theType) { |
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packer.setUp(theType); |
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let values = packer.fromBytes( |
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buffer.slice(0, theType["offset"]), theType); |
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return values ? values[0] : theType["char"] ? "" : null; |
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} |
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/** |
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* Write an array of numbers or a string to a byte buffer. |
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* @param {!Array<number|string>} values The values. |
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* @param {!Object} theType The type definition. |
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* @return {!Array<number|string>} |
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* @throws {Error} If the type definition is not valid. |
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*/ |
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function packArray(values, theType) { |
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packer.setUp(theType); |
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// Fix strings with bad length in the array |
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if (theType["char"]) { |
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let len = values.length; |
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for (let i=0; i<len; i++) { |
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values[i] = packer.fixBadString(values[i], theType); |
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} |
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} |
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return packer.toBytes(values, theType); |
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} |
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/** |
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* Read an array of numbers or a string from a byte buffer. |
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* @param {!Array<number|string>|!Uint8Array} buffer The byte array. |
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* @param {!Object} theType The type definition. |
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* @return {!Array<number|string>|number} |
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* @throws {Error} If the type definition is not valid. |
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*/ |
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function unpackArray(buffer, theType) { |
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packer.setUp(theType); |
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return packer.fromBytes(buffer, theType); |
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} |
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// Methods |
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module.exports.pack = pack; |
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module.exports.unpack = unpack; |
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module.exports.packArray = packArray; |
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module.exports.unpackArray = unpackArray; |
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module.exports.types = require("./lib/types"); |
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rochars /
byte-data
