Please note the following legal notice. This function is derived from the RSA Data Security, Inc. MD5 Message-Digest Algorithm Calculate the MD5 digest for the supplied file

Declared in file: hzCodec.h
Defined in file : hzCodec.cpp

Function Logic:

Function body:

hzEcode hzMD5::CalcMD5File (const char* filepath)
{
   //  Category: Codec
   //  
   //  Please note the following legal notice. This function is derived from the RSA Data Security, Inc. MD5 Message-Digest Algorithm
   //  
   //  Calculate the MD5 digest for the supplied file
   //  
   //  Arguments: 1) filepath The file to be hashed
   //  
   //  Returns: E_ARGUMENT If the filepath is not supplied
   //     E_NOTFOUND If the filepath specified does not exist as a directory entry of any kind
   //     E_TYPE  If the filepath names a directory entry that is not a file
   //     E_NODATA If the filepath is a file but empty
   //     E_OPENFAIL If the file specified could not be opened for reading
   //     E_OK  If this MD5 value is calculated
   _hzfunc("hzMD5::CalcMD5(file)") ;
   ifstream    is ;            //  Input stream
   _md5_unit   md5Unit ;       //  MD5 encoding unit
   uchar*      workBuf ;       //  Working data buffer
   int32_t     n ;             //  Buffer limit
   hzEcode     rc ;            //  Return code
   rc = OpenInputStrm(is, filepath) ;
   if (rc != E_OK)
       return rc ;
   n = 0;
   workBuf = new uchar[8196];
   for (;;)
   {
       is.read((char*) (workBuf + n), 4096);
       if (!is.gcount())
           break ;
       n += is.gcount() ;
       if (n & 0x3f)
           continue ;
       //  s = _xlate_md5(workBuf, n, 0, md5Unit) ;
       _xlate_md5(workBuf, n, 0,md5Unit) ;
       n = 0;
   }
   //  _xlate_md5(workBuf, n, m_md5val, md5Unit) ;
   _xlate_md5(workBuf, n, (uchar*) m_Parts, md5Unit) ;
   delete [] workBuf ;
   is.close()  ;
   return E_OK ;
}