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// $Id: mmdb_io_stream.cpp $
// =================================================================
//
// CCP4 Coordinate Library: support of coordinate-related
// functionality in protein crystallography applications.
//
// Copyright (C) Eugene Krissinel 2000-2013.
//
// This library is free software: you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License version 3, modified in accordance with the provisions
// of the license to address the requirements of UK law.
//
// You should have received a copy of the modified GNU Lesser
// General Public License along with this library. If not, copies
// may be downloaded from http://www.ccp4.ac.uk/ccp4license.php
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// =================================================================
//
// 11.09.13 <-- Date of Last Modification.
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// -----------------------------------------------------------------
//
// **** Module : Stream_ <interface>
// ~~~~~~~~~
// **** Classes : mmdb::io::Stream ( Basic Stream Class )
// ~~~~~~~~~
//
// (C) E. Krissinel 1995-2013
//
// =================================================================
//
#include "mmdb_io_stream.h"
namespace mmdb {
namespace io {
// ========================== CStream ===========================
// Each streamable class should be derived from Stream
// and have constructor Class(PStream & Object), which should
// initialize all memory of the class, and virtual functions
// read(..) and write(..) (see below). Constructor Class(PStream&)
// must not touch the Object variable. This constructor is used
// only once just before read(..) function. It is assumed that
// read/write functions of Class provide storage/reading of
// all vital data. Function read(..) must read data in exactly
// the same way as function write(..) stores it.
// For using Class in streams, three following functions should
// be supplied:
//
// 1.
// void StreamWrite ( RFile f, RPClass Object ) {
// StreamWrite ( f,(PStream)PClass );
// }
//
// 2.
// PCStream ClassInit ( RPStream Object ) {
// return (PStream)(new Class(Object));
// }
//
// 3.
// void StreamRead ( RFile f, RPClass Object ) {
// StreamRead_ ( f,(PStream)Object,ClassInit );
// }
//
// All these functions are automatically generated by macros
// DefineStreamFunctions(CClass) -- in the header -- and
// MakeStreamFunctions(CClass) -- in the implementation body.
// Then CClass may be streamed in/out using functions #1 and #3.
// StreamRead will return NULL for Object if it was not
// in the stream. If Object existed before StreamRead(..) but
// was not found in the stream, it will be disposed.
void StreamRead_ ( RFile f, RPStream Object,
InitStreamObject Init ) {
int i;
f.ReadInt ( &i );
if (i) {
if (!Object)
Object = Init(Object); //Object = new CStream ( Object );
Object->read ( f );
} else {
if (Object) delete Object;
Object = NULL;
}
}
void StreamWrite_ ( RFile f, RPStream Object ) {
int i;
if (Object) {
i = 1;
f.WriteInt ( &i );
Object->write ( f );
} else {
i = 0;
f.WriteInt ( &i );
}
}
MakeStreamFunctions(Stream)
}
}
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