System.ZLib.ZCompress

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Delphi

procedure ZCompress(const inBuffer: Pointer; inSize: Integer; out outBuffer: Pointer; out outSize: Integer; level: TZCompressionLevel);
procedure ZCompress(const inBuffer: Pointer; inSize: Integer; out outBuffer: Pointer; out outSize: Integer; level: TCompressionLevel);

C++

extern PACKAGE void __fastcall ZCompress(const void * inBuffer, int inSize, /* out */ void * &outBuffer, /* out */ int &outSize, TZCompressionLevel level = (TZCompressionLevel)(0x2))/* overload */;

Properties

Type	Visibility	Source	Unit	Parent
procedure function	public	System.ZLib.pas System.ZLib.hpp	System.ZLib	System.ZLib

Description

ZCompress compresses a source buffer into a destination buffer.

It compresses the buffer specified by inBuffer into the buffer specified by outBuffer.

inSize represents the size (in bytes) of inBuffer. outBuffer must not be initialized. The level optional parameter represents the level of compression. The function can be called without the level parameter. In this case, level is set to the default value: zcDefault. The function call modifies the outBuffer and outSize parameters. outBuffer points to the compressed data and outSize will represent the size (in bytes) of the compressed data.

ZCompress may raise an EZCompressionError.

See sample:

function myCompress(mySource: array of byte): Pointer;
var
  destinationSize, sourceLen: integer;
  outPut: Pointer;
  Source: PByte;
begin
  Source := @mySource[0];
  sourceLen := Length(mySource);
  ZCompress(Source, sourceLen, outPut, destinationSize, zcDefault);
  Result := outPut;
end;

See Also

• System.ZLib.EZCompressionError
• System.ZLib.TZCompressionLevel
• System.PByte