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/**
* Yudit Unicode Editor Source File
*
* GNU Copyright (C) 1997-2023 Gaspar Sinai <gaspar@yudit.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2,
* dated June 1991. See file COPYYING for details.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _SShared_h
#define _SShared_h
#include <string.h>
#include "SExcept.h"
/**
* @author: Gaspar Sinai <gaspar@yudit.org>
* @version: 2000-05-12
*/
/*
* This is the base class of SBinVector
*/
class SShared
{
public:
inline SShared (void);
SShared (unsigned int size);
SShared (const char* copy, unsigned int size);
SShared (const SShared& copy);
inline ~SShared ();
inline void ensure (unsigned int more);
static int debug (int level);
char* array;
unsigned int count;
unsigned int arraySize;
unsigned int vectorSize;
};
/**
* Ensure that we have enough capacity.
* Before this, the reference count should be one!
* int more - the elements in bytes that we need.
*/
void
SShared::ensure(unsigned int more)
{
if (arraySize > vectorSize + more) return;
char* oldArray=array;
/*
unsigned int newSize = (more + arraySize) * 2;
*/
unsigned int newSize = (vectorSize == 0)
? more : (more + arraySize) + arraySize/2;
if (newSize==0) newSize=1;
array = new char[newSize];
CHECK_NEW(array);
if (arraySize)
{
if (vectorSize) memcpy (array, oldArray, vectorSize);
delete [] (double*) oldArray;
}
// Hashtable has a fixed size. If resized, ever we need this line
//memset (&array[arraySize], 0, newSize - arraySize);
arraySize = newSize;
}
/**
* Create a buffer that will be referenced by all vectors.
*/
SShared::SShared(void)
{
count=1; array=0; arraySize=0; vectorSize=0;
}
/**
* delete a buffer. The count should be one here!
*/
SShared::~SShared()
{
if (arraySize != 0)
{
delete [] (double*) array;
}
}
#endif /* _SShared_h */
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