readme_grab.txt

采用zlib标准的压缩源码

================================================
  ziptest.c
  Linux shared library libGrab.so libGrab.a  
  2006-02-28    hall
================================================

AppWizard is demonstrates the direction for the Shared library in Linux :
libGrab.so libGrab.a.   libGrab.so is shared library in Linux for compress
and uncompress.

This file contains a summary of what you will find in each of the files that
make up your application.


/////////////////////////////////////////////////////////////////////////////////////////////

Grab.h
    This is the main header file for the application.It includes some  parameter
    manifesto and declares the  functions.You must include the header file.
    The interface functions:
    
    int     Grab    (uchr *GrabBuffer,             /* out: Destination  buffer            */       
                         ulong *dwBufLenout,         /* out: length of output from Grab */
                         uchar *lpBuffer,                /* in: Source  Buffer                    */               
                         ulong *lsbufflen,               /*  in: length of input  Buffer         */    
                         uchar leve
                         );
      
    The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9:
   1 gives best speed, 9 gives best compression, 0 gives no compression at
   all (the input data is simply copied a block at a time).
   Z_DEFAULT_COMPRESSION requests a default compromise between speed and
   compression (currently equivalent to level 6).

   
    
      int   unGrab    (uchar *lDestpBuffer,       /* out: Destination  buffer              */
                           ulong *dwBufLen,           /* (in/out) in:length memset  Buffer        
                                                                   out: length of output from Grab    */                
                           uchar *GrabBuffer,         /* in: Source Buffer                        */                                                       
                           ulong *lsbufflen              /* in: length of input Buffer             */                            
                           );


libGrab.so libGrab.a
    The libreary should be include in the compiled commend.
        For example:  gcc -g -o ziptest ziptest.c  libGrab.so 
        Or : copy libGrab.so to /lib  and compile
                            gcc -g -o ziptest ziptest.c  -lGrab 
                            

///////////////////////////////////////////////////////////////////////////////////////////////

   This Linux shared library(libEncod.so and libDecod.so) is made from the 
   source code.Frame as follows:

Grab------- MosesGrab---- source(*.c *.h ) 
          |                     |--- makefile--> libGrab.so libGrab.a
          |
          |---- libtest (my test code: ziptest.c)
          

////////////////////////////////////////////////////////////////////////////////////////////////