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/********************************************************************
* Description: cms_up.hh
* This C++ header file defines the abstract CMS_UPDATER class
* that defines the interface used by CMS to convert between local
* machine-specific data representations and network machine-independant
* represantations such as XDR via the derived classes of CMS_UPDATER.
*
* Derived from a work by Fred Proctor & Will Shackleford
*
* Author:
* License: LGPL Version 2
* System: Linux
*
* Copyright (c) 2004 All rights reserved.
*
* Last change:
********************************************************************/
#ifndef CMS_UP_HH
#define CMS_UP_HH
#include "cms.hh" /* enum CMS_STATUS, class CMS */
enum CMS_UPDATER_MODE {
CMS_NO_UPDATE = 0,
CMS_ENCODE_DATA,
CMS_DECODE_DATA,
CMS_ENCODE_HEADER,
CMS_DECODE_HEADER,
CMS_ENCODE_QUEUING_HEADER,
CMS_DECODE_QUEUING_HEADER
};
struct CMS_POINTER_TABLE_ENTRY {
void *ptr;
};
/* Abstract CMS_UPDATER CLASS */
class CMS_UPDATER {
public:
virtual CMS_STATUS update(bool &x) = 0;
virtual CMS_STATUS update(char &x) = 0;
virtual CMS_STATUS update(unsigned char &x) = 0;
virtual CMS_STATUS update(short int &x) = 0;
virtual CMS_STATUS update(unsigned short int &x) = 0;
virtual CMS_STATUS update(int &x) = 0;
virtual CMS_STATUS update(unsigned int &x) = 0;
virtual CMS_STATUS update(long int &x) = 0;
virtual CMS_STATUS update(unsigned long int &x) = 0;
virtual CMS_STATUS update(float &x) = 0;
virtual CMS_STATUS update(double &x) = 0;
virtual CMS_STATUS update(long double &x) = 0;
virtual CMS_STATUS update(char *x, unsigned int len) = 0;
virtual CMS_STATUS update(unsigned char *x, unsigned int len) = 0;
virtual CMS_STATUS update(short *x, unsigned int len) = 0;
virtual CMS_STATUS update(unsigned short *x, unsigned int len) = 0;
virtual CMS_STATUS update(int *x, unsigned int len) = 0;
virtual CMS_STATUS update(unsigned int *x, unsigned int len) = 0;
virtual CMS_STATUS update(long *x, unsigned int len) = 0;
virtual CMS_STATUS update(unsigned long *x, unsigned int len) = 0;
virtual CMS_STATUS update(float *x, unsigned int len) = 0;
virtual CMS_STATUS update(double *x, unsigned int len) = 0;
virtual CMS_STATUS update(long double *x, unsigned int len) = 0;
/* Neutrally Encoded Buffer positioning functions. */
virtual void rewind(); /* positions at beginning */
virtual int get_encoded_msg_size() = 0; /* Store last position in
header.size */
virtual int set_mode(CMS_UPDATER_MODE);
virtual CMS_UPDATER_MODE get_mode();
virtual void set_encoded_data(void *, long _encoded_data_size);
protected:
/**********************************************
* Aliases to variables in the CMS parent
* using aliases lets CMS and its CMS_UPDATER share this information
* more conveniently and allowed the CMS_UPDATER functions to be pulled out
* of CMS with fewer changes.
*********************************************/
void *(&encoded_data); /* pointer to local copy of encoded data */
void *(&encoded_header); /* pointer to local copy of encoded header */
void *(&encoded_queuing_header); /* pointer to local copy of encoded
queue info */
CMS_STATUS & status;
long &size;
long &encoded_header_size; /* Dynamically determined size */
long &encoded_queuing_header_size; /* Dynamically determined size */
int &using_external_encoded_data;
int &pointer_check_disabled;
long &encoded_data_size;
virtual int check_pointer(char *ptr, long bytes);
CMS_UPDATER_MODE mode;
CMS *cms_parent;
CMS_UPDATER(CMS *, int create_encoded_data =
1, long _neutral_size_factor = 4);
virtual ~ CMS_UPDATER();
long neutral_size_factor;
int encoding;
/* Friends */
friend class CMS;
};
#endif /* !defined( CMS_UP_HH ) */
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