compression

How can I easily compress and decompress files using zlib? For decompression: char buf[1024*1024*16]; gzFile *fi = (gzFile *)gzopen("file.gz","rb"); gzrewind(fi); while(!gzeof(fi)) { int len = gzread(fi,buf,sizeof(buf)); //buf contains len bytes of decompressed data } gzclose(fi); For compression gzFile *fi = (gzFile *)gzopen("file.gz","wb"); gzwrite(fi,"my decompressed data",strlen("my decompressed data")); gzclose(fi); Please read through this. The information is already available here : That is the first link that shows up even on google. If you can use boost, I would recommend the boost

I like to zip multiple files which are being created dynamically in my web application. Those files should be zipped. For this, i dont want to use any third-party tools. just like to use .net api in c# Ruben Bartelink Use System.IO.Packaging in .NET 3.0+ . See this introduction to System.IO.Packaging If you're able to take a .NET 4.5 dependency, there's a System.IO.Compression.ZipArchive in that universe; see walkthrough article here ( via InfoQ news summary article here ) With the release of the .NET Framework 4.5 this is actually a lot easier now with the updates to System.IO.Compression

I would like to reduce My Bitmap image size to maximum of 640px. For example I have Bitmap image of size 1200 x 1200 px .. How can I reduce it to 640px. Divyang Metalia If you pass bitmap width and height then use: public Bitmap getResizedBitmap(Bitmap image, int bitmapWidth, int bitmapHeight) { return Bitmap.createScaledBitmap(image, bitmapWidth, bitmapHeight, true); } If you want to keep the bitmap ratio the same, but reduce it to a maximum side length, use: public Bitmap getResizedBitmap(Bitmap image, int maxSize) { int width = image.getWidth(); int height = image.getHeight(); float

Is there a way to compress/archive a folder in the server using php script to .zip or .rar or to any other compressed format, so that on request we could archive the folder and then give the download link Thanks in advance Here is an example: <?php // Adding files to a .zip file, no zip file exists it creates a new ZIP file // increase script timeout value ini_set('max_execution_time', 5000); // create object $zip = new ZipArchive(); // open archive if ($zip->open('my-archive.zip', ZIPARCHIVE::CREATE) !== TRUE) { die ("Could not open archive"); } // initialize an iterator // pass it the