Skip to main content

ZLib Static Library for Qt/Symbian

I've been surfing the internet looking for the zlib static library -which is missing from the Qt/Symbian SDK. I downloaded and installed some old Symbian SDKs and finally found the needed files.

You can download them from this link


Here is a code example of how I used it:

LIBS+= -lefsrv -lezlib -leikcore -lcone

#include <ezgzip.h>
#include <f32file.h>
#include <ezcompressor.h>
#include <ezdecompressor.h>
#include <ezfilebuffer.h>
#include <eikenv.h>

void CompressFileL(QString sourceFile, QString destinationFile)
{
    TPtrC16 aSrcFile(reinterpret_cast<const TUint16*>(sourceFile.utf16()));
    TPtrC16 aDesFile(reinterpret_cast<const TUint16*>(destinationFile.utf16()));
    
    CEZFileBufferManager* fileCompressor = NULL;
    CEZCompressor* comprsr = NULL;
    RFs iFs = CEikonEnv::Static()->FsSession();
    RFile inFile,outFile;
    User::LeaveIfError(inFile.Open(iFs,aSrcFile,EFileRead));
    CleanupClosePushL(inFile);
    User::LeaveIfError(outFile.Create(iFs,aDesFile,EFileRead | EFileWrite));
    CleanupClosePushL(outFile);

    fileCompressor = CEZFileBufferManager::NewLC(inFile,outFile);
    comprsr = CEZCompressor::NewLC(*fileCompressor,CEZCompressor::EBestCompression);

    TBool res = EFalse;
    do
    {
        res = comprsr->DeflateL();
    }while(res);

    CleanupStack::PopAndDestroy(4);//inputFile,outFile,fileCompressor,comprsr
}


void DecompressFileL(QString sourceFile, QString destinationFile)
{
    TPtrC16 aSrcFile(reinterpret_cast<const TUint16*>(sourceFile.utf16()));
    TPtrC16 aDesFile(reinterpret_cast<const TUint16*>(destinationFile.utf16()));
    
    CEZFileBufferManager* fileCompressor = NULL;
    CEZDecompressor* decomprsr = NULL;
    RFs iFs = CEikonEnv::Static()->FsSession();
    RFile inFile,outFile;
    User::LeaveIfError(inFile.Open(iFs,aSrcFile,EFileRead));
    CleanupClosePushL(inFile);
    User::LeaveIfError(outFile.Create(iFs,aDesFile,EFileRead | EFileWrite));
    CleanupClosePushL(outFile);

    fileCompressor = CEZFileBufferManager::NewLC(inFile,outFile);
    decomprsr = CEZDecompressor::NewLC(*fileCompressor);

    TBool res = EFalse;
    do
    {
        res = decomprsr->InflateL();
    }while(res);

    CleanupStack::PopAndDestroy(4);//inputFile,outFile,fileCompressor,decomprsr
}

Labels:

Comments

Post a Comment

Popular posts from this blog

Prayer Times Calculations: Pure C++ Code

[25-March-2017] Update: For brothers and sisters in Indonesia or any country below the equator, thanks to Reza's comment ,  the code now works correctly. [18-January-2012 Update: I refined the code to make it easier and more elegant to use] [06-July-2011 Update: I found this page http://praytimes.org/calculation#Implementation ] This idea came to me when a friend of mine was asking for an 'offline database' for prayer times. I searched for algorithms to make my own database and almost all search results lead to the same algorithm. And all codes are divided into two categories: a simple but approximate one, and a complicated but precise one. I tried with the complicated one to understand it but it needs more time because of its nested functions and -unfortunately- it is not a priority right now. So I went with the easy one as a start. One thing I noticed is that every person is trying to make the ultimate use of the framework he is working on (mostly dotNet). But co...
82 comments
Read more

[Qt] Custom QListView delegate with word wrap

Using QListView with a custom item layout has been a very popular demand by many developers. The problem with using  a custom delegate was having some basic features like word wrap depending on the allowed list size. Here is a screenshot from a project prototype I've been working on. The text will wrap around to fit in multiple lines depending on text length and list view width. My custom delegate is about using two important methods: QFontMetrics::boundingRect() and QPainter::drawText() . The first method will return the minimum Rect needed to draw the given text using the given origin and font. The second method draws the given text within the given Rect. Note that the flag Qt::TextWordWrap is given to both methods when called. The code is simple: Get system default font. Process the font to suite your needs. In my case: I have a normal font and another bold one for the header. Create a QFontMetrics instance for each font. Use the QFontMetrics instances to cal...
10 comments
Read more

Qt Folder Compression

I needed a compression module that does not depend on anything but Qt, and I mean a module to compress a complete folder with its children. This is because I wanted the compression module to work on any platform supported by Qt with no other dependencies. So I made this modules that only uses only qCompress() & qUncompress() methods plus some logic. It is mainly a recursive algorithm that serializes data into a single file, each with its relative path to the parent folder. And deserializing is just taking binary data, creating needed subfolders, and saving the file. Download: QtFolderCompressor.zip [FolderCompressor.h] #ifndef FOLDERCOMPRESSOR_H #define FOLDERCOMPRESSOR_H #include <QFile> #include <QObject> #include <QDir> class FolderCompressor : public QObject { Q_OBJECT public: explicit FolderCompressor(QObject *parent = 0); //A recursive function that scans all files inside the source folder //and serializes all files in a row of f...
13 comments
Read more