ACTIONSCRIPT BYTEARRAY PDF

Write array to ByteArray: ByteArray «Development «Flash / Flex / ActionScript. is it possible to write past the null byte into the ByteArray()?. Of course it is. ByteArray — is a chunk of raw data. You can write whatever you like there, and you. As the name suggests, a byte array allows you to work with binary data by storing it Most of the uses of byte arrays in ActionScript are fairly specialized, but an.

Author: Yom Kagale
Country: Iran
Language: English (Spanish)
Genre: Music
Published (Last): 7 December 2007
Pages: 50
PDF File Size: 4.4 Mb
ePub File Size: 18.10 Mb
ISBN: 679-2-26628-856-9
Downloads: 30510
Price: Free* [*Free Regsitration Required]
Uploader: JoJogar

ActionScript 3 fundamentals: Vectors and ByteArrays

The ByteArray class is for advanced developers who need to access data on the byte level. In-memory data is a packed array the most compact representation for the data type of bytes, but an instance of the ByteArray class can be manipulated with the standard [] array access operators.

It also can be read and written to as an in-memory file, using methods similar to those byteraray the URLStream and Socket classes. In addition, zlib compression and decompression are supported, as well as Action Message Format AMF object serialization.

Write array to ByteArray : ByteArray « Development « Flash / Flex / ActionScript

Possible uses of the ByteArray class include the following: Creating a custom byteaarray to connect to a server. Optimizing the size of your data by using data types. The number of bytes of data available for reading from the current position in the byte array to the end of the array.

Use the bytesAvailable property in conjunction with the read methods each time you access a ByteArray object to ensure that you are reading valid data. Denotes the default object encoding for the ByteArray class to use for a new ByteArray instance. When you create a new ByteArray instance, the encoding on that instance starts with the value of defaultObjectEncoding.

The defaultObjectEncoding property is initialized to ObjectEncoding. When an object is written to or read actiohscript binary data, byterray objectEncoding value is used to determine whether the ActionScript 3. The value is a constant from the ObjectEncoding class. Changes or reads the byte order for the data; either Endian. The length of the ByteArray object, in bytes. If the length is set to a value that is larger than the current length, the the right side of the byte array is filled with zeros.

If the length is set to a value that is smaller than the current length, the byte array is truncated. Used to determine whether the ActionScript 3. Moves, or returns the current position, in bytes, of the file pointer into the ByteArray object.

This is the point at which the next call to a read method starts reading or a write method starts writing. Creates a ByteArray instance representing a packed array of bytes, so that you can use the methods and properties in this class to optimize your data storage and stream. Compresses the byte array.

byhearray The entire byte array is compressed. For content running in Adobe AIR, you can specify a compression algorithm by passing a value defined in the CompressionAlgorithm class as the algorithm parameter. Flash Player supports only the default algorithm, deflate. After the call, the length property of the ByteArray is set to the new length. The position actionscrpt is set to the end of the byte array. The zlib compressed data format is described at http: The deflate compression algorithm is described at http: The deflate compression algorithm is used in several compression formats, bytearra as zlib, gzip, some zip implementations, and others.

  KEUZEGIDS HBO VOLTIJD 2012 PDF

When data is compressed using one of those compression formats, in addition to storing the compressed version of the original data, the compression format data for example, the.

For example, when a ByteArray is compressed using the zlib algorithm, the resulting ByteArray is structured in a specific format. Certain bytes contain metadata about the compressed data, while other bytes contain the actual compressed version of the original ByteArray data. As defined by the zlib compressed data format specification, those bytes that is, the portion containing the compressed version of the original data are compressed using the deflate algorithm.

Consequently those bytes are identical to the result of calling compress CompressionAlgorithm. However, the result from compress CompressionAlgorithm. Consequently, in order to use the deflate format to compress a ByteArray instance’s data in a specific format such as gzip or zip, you can’t just call compress CompressionAlgorithm. You must create a ByteArray structured according to the compression format’s specification, including the appropriate metadata as well as the compressed data obtained using the deflate format.

Likewise, in order to decode data compressed in a format such as gzip or zip, you can’t simply call uncompress CompressionAlgorithm. First, you must byteareay the metadata from the compressed data, and you can then use the deflate format to decompress the compressed data. Valid values are defined as constants in the CompressionAlgorithm class. The default is to use zlib format. This parameter is only recognized for content running in Adobe AIR. Flash Player supports only the default algorithm, deflate, and throws an exception if you attempt to pass a value for this parameter.

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

Adobe Flash Platform * Reading and writing a ByteArray

Reads a signed byte byytearray the byte stream. The returned value is in the range to 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.

ByteArray — The ByteArray object to read data into. The default value of 0 causes all available data to be read. Reads a signed bit integer from the byte stream.

Reads a multibyte string of specified length from the byte stream using the specified character set. String — The string denoting the character set to use to interpret the bytes. Possible character set strings include “shift-jis””cn-gb””iso”and others. For a complete list, see Supported Character Sets. 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.

  BHAI GURDAS JI DI VAAR PDF

On the other machine, the application will use the system’s default code page. Reads an unsigned byte from the byte stream. The returned value is in the range 0 to Reads an unsigned bit integer from the byte stream. Reads a UTF-8 string from the byte stream.

The string is assumed to be prefixed with an unsigned short indicating the length in bytes. Reads a sequence of UTF-8 bytes specified by the length parameter from the byte stream and returns a string. Converts the byte array to a string. If the data in the array begins with a Unicode byte order mark, the application will honor that mark when converting to a string. Decompresses the byte array. The byte array must have been compressed using the same algorithm.

The position property is set to 0. In order to decode data compressed in a format that uses the deflate compression algorithm, such as data in gzip or zip format, it will not work to call uncompress CompressionAlgorithm. First, you must separate the metadata that is included as part of the compressed data format from the actual compressed data.

For more information, see the compress method description. This must be the same compression algorithm used to compress the data. Writes a Boolean value. A single byte is written according to the value parameter, either 1 if true or 0 if false. Boolean — A Boolean value determining which byte is written. If the parameter is truethe method writes a 1; if falsethe method writes a 0. Writes a byte to the byte stream.

The low 8 bits of the parameter are used. The high 24 bits are ignored. The low 8 bits are written to the byte stream. Writes a sequence of length bytes from the specified byte array, bytesstarting offset zero-based index bytes into the byte stream.

If the length parameter is omitted, the default length of 0 is used; the method writes the entire buffer starting at offset. If the offset parameter is also omitted, the entire buffer is written.

If offset or length is out of range, they are clamped to the beginning and end of the bytes array. ByteArray — The ByteArray object. Number — A double-precision bit floating-point number.

Number — A single-precision bit floating-point number. String — The string value to be written. String — The string denoting the character set to use. Writes a bit integer to the byte stream. The low 16 bits of the parameter are used. The high 16 bits are ignored. Writes a UTF-8 string to the byte stream.

The length of the UTF-8 string in bytes is written first, as a bit integer, followed by the bytes representing the characters of the string. Notice how a code segment is added at the end to check for end actiosncript file errors to ensure that the byte stream is not read past its end.