Difference between revisions of "LMD VCL - ZLib support"
(→LMDZLib interface) |
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| Line 33: | Line 33: | ||
var | var | ||
LDataStream: TLMDCompressionStream; | LDataStream: TLMDCompressionStream; | ||
| − | + | LFileStream: TFileStream; | |
begin | begin | ||
| − | + | LFileStream := TFileStream.Create(FileName, fmCreate); | |
try | try | ||
| + | LDataStream := TLMDCompressionStream.Create(clDefault, LFileStream); | ||
try | try | ||
LDataStream(FSomeData, FSizeOfSomeData); | LDataStream(FSomeData, FSizeOfSomeData); | ||
| Line 43: | Line 44: | ||
end; | end; | ||
finally | finally | ||
| − | + | LFileStream.Free; | |
end; | end; | ||
end; | end; | ||
... | ... | ||
</delphi> | </delphi> | ||
Revision as of 13:58, 17 July 2007
Introduction
LMD 2k7 has built in ZLib library to compress/uncompress any data. This is native pascal solution it doesn't require any external obj or dll files.
Units
LMDZCommonUnit.pas - Common code and types for compress/decompress routines LMDZCompressUnit.pas - Unit that contain compression code (raw ZLib api) LMDZUncompressUnit.pas - Unit with uncompression code (raw ZLib api) LMDZLib.pas - TStream wrappers that provide interface to compress/decompress data directly into any TStream descendants.
LMDZLib interface
TLMDCompressionStream wrapper class that compress data directly to any TStream descendant, and has transparent interface that compatible with TStream, so you can easily add compression for exists application. Example:
<delphi> uses
..., LMDZLib, ...;
// old code ... var
LDataStream: TFileStream;
begin
LDataStream := TFileStream.Create(FileName, fmCreate); try LDataStream(FSomeData, FSizeOfSomeData); finally LDataStream.Free; end;
end; ...
// code with TLMDCompressionStream ... var
LDataStream: TLMDCompressionStream; LFileStream: TFileStream;
begin
LFileStream := TFileStream.Create(FileName, fmCreate);
try
LDataStream := TLMDCompressionStream.Create(clDefault, LFileStream);
try
LDataStream(FSomeData, FSizeOfSomeData);
finally
LDestStream.Free;
end;
finally
LFileStream.Free;
end;
end; ... </delphi>
