XDATA

Status :

Extended ActionScript3 ByteArray API for JavaScript

Developed by Nidin Vinayakan

License

MIT

NPM

npm install xdata

npm registry https://www.npmjs.com/package/xdata

Usage

import {DataArray,ByteArray,BitArray} from "xdata/core"
import {LZMAHelper,ZLIBHelper} from "xdata/helpers"
import {LZMA, ZLIB} from "xdata/compression"

Classes

• 1. BitArray
• 2. ByteArray
• 3. DataArray
• 4. LZMAHelper
• 5. ZLIBHelper

BitArray

constructor(buffer?:ArrayBuffer)
readBits(bits:number, bitBuffer:number = 0):number
writeBits(bits:number, value:number)
resetBitsPending()
static calculateMaxBits(signed:boolean, values:Array<number>):number

ByteArray

constructor(buffer?:ArrayBuffer, offset:number = 0, length:number = 0)

readBoolean():boolean

/**
 * Reads a Boolean value from the byte stream. A single byte is read,
 * and true is returned if the byte is nonzero,
 * false otherwise.
 * @return    Returns true if the byte is nonzero, false otherwise.
 */

readByte():number

/**
 * Reads a signed byte from the byte stream.
 * The returned value is in the range -128 to 127.
 * @return    An integer between -128 and 127.
 */

readBytes(_bytes:ByteArray = null, offset:number = 0, length:number = 0, createNewBuffer:boolean = false):ByteArray

/**
 * Reads the number of data bytes, specified by the length parameter, from the byte stream.
 * The bytes are read into the ByteArray object specified by the bytes parameter,
 * and the bytes are written into the destination ByteArray starting at the _position specified by offset.
 * @param    bytes    The ByteArray object to read data into.
 * @param    offset    The offset (_position) in bytes at which the read data should be written.
 * @param    length    The number of bytes to read.  The default value of 0 causes all available data to be read.
 */

readDouble():number

/**
 * Reads an IEEE 754 double-precision (64-bit) floating-point number from the byte stream.
 * @return    A double-precision (64-bit) floating-point number.
 */

readFloat():number

/**
 * Reads an IEEE 754 single-precision (32-bit) floating-point number from the byte stream.
 * @return    A single-precision (32-bit) floating-point number.
 */

readInt():number

/**
 * Reads a signed 32-bit integer from the byte stream.
 *
 *   The returned value is in the range -2147483648 to 2147483647.
 * @return    A 32-bit signed integer between -2147483648 and 2147483647.
 */

readInt64():Int64

/**
 * Reads a signed 64-bit integer from the byte stream.
 *
 *   The returned value is in the range −(2^63) to 2^63 − 1
 * @return    A 64-bit signed integer between −(2^63) to 2^63 − 1
 */

readMultiByte(length:number, charSet?:string):string

/**
 * Reads a multibyte string of specified length from the byte stream using the
 * specified character set.
 * @param    length    The number of bytes from the byte stream to read.
 * @param    charSet    The string denoting the character set to use to interpret the bytes.
 *   Possible character set strings include "shift-jis", "cn-gb",
 *   "iso-8859-1", and others.
 *   For a complete list, see Supported Character Sets.
 *   Note: If the value for the charSet parameter
 *   is not recognized by the current system, the application uses the system's default
 *   code page as the character set. For example, a value for the charSet parameter,
 *   as in myTest.readMultiByte(22, "iso-8859-01") that uses 01 instead of
 *   1 might work on your development system, but not on another system.
 *   On the other system, the application will use the system's default code page.
 * @return    UTF-8 encoded string.
 */

readShort():number

/**
 * Reads a signed 16-bit integer from the byte stream.
 *
 *   The returned value is in the range -32768 to 32767.
 * @return    A 16-bit signed integer between -32768 and 32767.
 */

readUnsignedByte():number

/**
 * Reads an unsigned byte from the byte stream.
 *
 *   The returned value is in the range 0 to 255.
 * @return    A 32-bit unsigned integer between 0 and 255.
 */

readUnsignedInt():number

/**
 * Reads an unsigned 32-bit integer from the byte stream.
 *
 *   The returned value is in the range 0 to 4294967295.
 * @return    A 32-bit unsigned integer between 0 and 4294967295.
 */

readVariableSizedUnsignedInt():number

/**
 * Reads a variable sized unsigned integer (VX -> 16-bit or 32-bit) from the byte stream.
 *
 *   A VX is written as a variable length 2- or 4-byte element. If the index value is less than 65,280 (0xFF00),
 *   then the index is written as an unsigned two-byte integer. Otherwise the index is written as an unsigned
 *   four byte integer with bits 24-31 set. When reading an index, if the first byte encountered is 255 (0xFF),
 *   then the four-byte form is being used and the first byte should be discarded or masked out.
 *
 *   The returned value is in the range  0 to 65279 or 0 to 2147483647.
 * @return    A VX 16-bit or 32-bit unsigned integer between 0 to 65279 or 0 and 2147483647.
 */

to be continued...