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Environment: OS independent

Now, many applications need API to do Gzip in memory. The Zlib form, http://www.gzip.org/zlib, provides Gzip and unGzip function, but they are for files. It's very inconvenient to compress and decompress small data that could be compressed in memory. I ported the Gzip and unGzip functions to two template classes, CA2GZIP and CGZIP2A, to do Gzip in memory; they also allocate and deallocate memory automatically. It works with zlib from http://www.gzip.org/zlib. The following is some code for how to use them.

#include "GZipHelper.h"
  void main()
  {
    char plainText[]="Plain text here";
      CA2GZIP gzip(plainText,strlen(plainText));
                                   // do compressing here;
      LPGZIP pgzip=gzip.pgzip;     // pgzip is zipped data pointer,
                                   // you can use it directly
      int len=gzip.Length;         // Length is length of zipped
                                   // data;

      CGZIP2A plain(pgzip,len);    // do uncompressing here

      char *pplain=plain.psz;      // psz is plain data pointer
      int  aLen=plain.Length;      // Length is length of unzipped
                                   // data.
  }

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