protocols.h

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// Copyright (C) 2006-2014 David Sugar, Tycho Softworks.
// Copyright (C) 2015 Cherokees of Idaho.
//
// This file is part of GNU uCommon C++.
//
// GNU uCommon C++ is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU uCommon C++ 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.
//
// You should have received a copy of the GNU Lesser General Public License
// along with GNU uCommon C++.  If not, see <http://www.gnu.org/licenses/>.
 
#ifndef _UCOMMON_PROTOCOLS_H_
#define _UCOMMON_PROTOCOLS_H_
 
#ifndef _UCOMMON_CPR_H_
#include <ucommon/cpr.h>
#endif
 
namespace ucommon {
 
class String;
class StringPager;
 
class __EXPORT MemoryProtocol
{
protected:
    friend class MemoryRedirect;
 
    virtual void *_alloc(size_t size) = 0;
 
public:
    virtual ~MemoryProtocol();
 
    inline void *alloc(size_t size) {
        return _alloc(size);
    }
 
    void *zalloc(size_t size);
 
    char *dup(const char *string);
 
    void *dup(void *memory, size_t size);
};
 
class __EXPORT MemoryRedirect : public __PROTOCOL MemoryProtocol
{
private:
    MemoryProtocol *target;
 
public:
    MemoryRedirect(MemoryProtocol *protocol);
 
    virtual void *_alloc(size_t size) __OVERRIDE;
};
 
class __EXPORT LockingProtocol
{
protected:
    virtual void _lock(void);
    virtual void _unlock(void);
 
public:
    virtual ~LockingProtocol();
};
 
class __EXPORT PrintProtocol
{
public:
    virtual ~PrintProtocol();
 
    virtual const char *_print(void) const = 0;
};
 
class __EXPORT InputProtocol
{
public:
    virtual ~InputProtocol();
 
    virtual int _input(int code) = 0;
};
 
class __EXPORT ObjectProtocol
{
public:
    virtual void retain(void) = 0;
 
    virtual void release(void) = 0;
 
    virtual ~ObjectProtocol();
 
    ObjectProtocol *copy(void);
 
    inline void operator++(void) {
        retain();
    }
 
    inline void operator--(void) {
        release();
    }
};
 
class __EXPORT KeyProtocol
{
protected:
    virtual int keytype(void) const = 0;
 
    virtual size_t keysize(void) const = 0;
 
    virtual const void *keydata(void) const = 0;
 
    virtual bool equal(const KeyProtocol& compare) const;
 
    inline bool operator!=(const KeyProtocol& compare) const {
        return !equal(compare);
    }
 
    virtual ~KeyProtocol();
};
 
} // namespace ucommon
 
#endif