Bz2 DataFlex Reference Documentation

Bz2

Current Version: 10.1.0

Provides the ability to create and unzip .bz2 compressed files using the BZip2 compression algorithm.

Object Creation

// (Dataflex programs use the 32-bit Chilkat ActiveX)
Handle hoBz2
Get Create(RefClass(cComChilkatBz2)) to hoBz2

Properties

AbortCurrent
Function ComAbortCurrent Returns Boolean
Procedure Set ComAbortCurrent Boolean value
Introduced in version 9.5.0.58

When set to True, causes the currently running method to abort. Methods that always finish quickly (i.e.have no length file operations or network communications) are not affected. If no method is running, then this property is automatically reset to False when the next method is called. When the abort occurs, this property is reset to False. Both synchronous and asynchronous method calls can be aborted. (A synchronous method call could be aborted by setting this property from a separate thread.)

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DebugLogFilePath
Function ComDebugLogFilePath Returns String
Procedure Set ComDebugLogFilePath String value

If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. This logging helps identify the context and history of Chilkat calls leading up to any crash or hang, aiding in debugging.

Enabling the VerboseLogging property provides more detailed information. This property is mainly used for debugging rare instances where a Chilkat method call causes a hang or crash, which should generally not happen.

Possible causes of hangs include:

  • A timeout property set to 0, indicating an infinite timeout.
  • A hang occurring within an event callback in the application code.
  • An internal bug in the Chilkat code causing the hang.

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LastBinaryResult
Function ComLastBinaryResult Returns Variant

This property is mainly used in SQL Server stored procedures to retrieve binary data from the last method call that returned binary data. It is only accessible if Chilkat.Global.KeepBinaryResult is set to True. This feature allows for the retrieval of large varbinary results in an SQL Server environment, which has restrictions on returning large data via method calls, though temp tables can handle binary properties.

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LastErrorHtml
Function ComLastErrorHtml Returns String

Provides HTML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

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LastErrorText
Function ComLastErrorText Returns String

Provides plain text information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

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LastErrorXml
Function ComLastErrorXml Returns String

Provides XML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

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LastMethodSuccess
Function ComLastMethodSuccess Returns Boolean
Procedure Set ComLastMethodSuccess Boolean value

Indicates the success or failure of the most recent method call: True means success, False means failure. This property remains unchanged by property setters or getters. This method is present to address challenges in checking for null or Nothing returns in certain programming languages.

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LastStringResult
Function ComLastStringResult Returns String

In SQL Server stored procedures, this property holds the string return value of the most recent method call that returns a string. It is accessible only when Chilkat.Global.KeepStringResult is set to TRUE. SQL Server has limitations on string lengths returned from methods and properties, but temp tables can be used to access large strings.

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LastStringResultLen
Function ComLastStringResultLen Returns Integer

The length, in characters, of the string contained in the LastStringResult property.

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VerboseLogging
Function ComVerboseLogging Returns Boolean
Procedure Set ComVerboseLogging Boolean value

If set to True, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is False. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

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Version
Function ComVersion Returns String

Version of the component/library, such as "10.1.0"

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Methods

CompressFile
Function ComCompressFile String inFilename String toPath Returns Boolean

Compresses a file to create a BZip2 compressed file (.bz2).

Note: Both inFilename and toPath should be relative or absolute file paths (not just a path to a directory). For example "someDir1/someDir2/myFile.txt" or "c:/someDir1/myFile.bz2".

Returns True for success, False for failure.

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CompressFileAsync (1)
Function ComCompressFileAsync String inFilename String toPath Returns cComChilkatTask

Creates an asynchronous task to call the CompressFile method with the arguments provided.

Returns null on failure

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CompressFileToMem
Function ComCompressFileToMem String inFilename Returns Variant

BZip2 compresses a file to an in-memory image of a .bz2 file.

Returns null on failure

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CompressFileToMemAsync (1)
Function ComCompressFileToMemAsync String inFilename Returns cComChilkatTask

Creates an asynchronous task to call the CompressFileToMem method with the arguments provided.

Returns null on failure

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CompressMemory
Function ComCompressMemory Variant inData Returns Variant

Compresses in-memory data to an in-memory image of a .bz2 file.

Returns null on failure

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CompressMemoryAsync (1)
Function ComCompressMemoryAsync Variant inData Returns cComChilkatTask

Creates an asynchronous task to call the CompressMemory method with the arguments provided.

Returns null on failure

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CompressMemToFile
Function ComCompressMemToFile Variant inData String toPath Returns Boolean

BZip2 compresses and creates a .bz2 file from in-memory data.

Returns True for success, False for failure.

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CompressMemToFileAsync (1)
Function ComCompressMemToFileAsync Variant inData String toPath Returns cComChilkatTask

Creates an asynchronous task to call the CompressMemToFile method with the arguments provided.

Returns null on failure

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LoadTaskCaller
Function ComLoadTaskCaller cComChilkatTask task Returns Boolean
Introduced in version 9.5.0.80

Loads the caller of the task's async method.

Returns True for success, False for failure.

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UncompressFile
Function ComUncompressFile String inFilename String toPath Returns Boolean

Unzips a .bz2 file.

Returns True for success, False for failure.

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UncompressFileAsync (1)
Function ComUncompressFileAsync String inFilename String toPath Returns cComChilkatTask

Creates an asynchronous task to call the UncompressFile method with the arguments provided.

Returns null on failure

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UncompressFileToMem
Function ComUncompressFileToMem String inFilename Returns Variant

Unzips a .bz2 file directly to memory.

Returns null on failure

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UncompressFileToMemAsync (1)
Function ComUncompressFileToMemAsync String inFilename Returns cComChilkatTask

Creates an asynchronous task to call the UncompressFileToMem method with the arguments provided.

Returns null on failure

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UncompressMemory
Function ComUncompressMemory Variant inData Returns Variant

Unzips from an in-memory image of a .bz2 file directly into memory.

Returns null on failure

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UncompressMemoryAsync (1)
Function ComUncompressMemoryAsync Variant inData Returns cComChilkatTask

Creates an asynchronous task to call the UncompressMemory method with the arguments provided.

Returns null on failure

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UncompressMemToFile
Function ComUncompressMemToFile Variant inData String toPath Returns Boolean

Unzips from an in-memory image of a .bz2 file to a file.

Returns True for success, False for failure.

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UncompressMemToFileAsync (1)
Function ComUncompressMemToFileAsync Variant inData String toPath Returns cComChilkatTask

Creates an asynchronous task to call the UncompressMemToFile method with the arguments provided.

Returns null on failure

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