RexxSmartBuffer.cpp

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/*----------------------------------------------------------------------------*/
/*                                                                            */
/* Copyright (c) 1995, 2004 IBM Corporation. All rights reserved.             */
/* Copyright (c) 2005-2009 Rexx Language Association. All rights reserved.    */
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/*----------------------------------------------------------------------------*/
/******************************************************************************/
/* REXX Kernel                                                                */
/*                                                                            */
/* Primitive Smart Buffer Class                                               */
/*                                                                            */
/******************************************************************************/
#include <stdlib.h>
#include <string.h>
#include "RexxCore.h"
#include "BufferClass.hpp"
#include "RexxSmartBuffer.hpp"
 
RexxSmartBuffer::RexxSmartBuffer(size_t startSize)
/******************************************************************************/
/* Function:  Initialize a smart buffer object                                */
/******************************************************************************/
{
                                       /* default initial buffersize, 1 page*/
                                       /* for buffer + data.                */
    OrefSet(this, this->buffer, (RexxBuffer *)new_buffer(startSize));
}
 
void RexxSmartBuffer::live(size_t liveMark)
/******************************************************************************/
/* Function:  Normal garbage collection live marking                          */
/******************************************************************************/
{
    memory_mark(this->buffer);
}
void RexxSmartBuffer::liveGeneral(int reason)
/******************************************************************************/
/* Function:  Generalized object marking                                      */
/******************************************************************************/
{
    memory_mark_general(this->buffer);
}
 
void RexxSmartBuffer::flatten(RexxEnvelope *envelope)
/******************************************************************************/
/* Function:  Flatten an object                                               */
/******************************************************************************/
{
    setUpFlatten(RexxSmartBuffer)
 
    flatten_reference(newThis->buffer, envelope);
 
    cleanUpFlatten
}
 
size_t RexxSmartBuffer::copyData(
    void *start,                       /* data to be copied                 */
    size_t length)                     /* length to copy                    */
/******************************************************************************/
/* Function:  Copy data into the buffer at the very end.                      */
/******************************************************************************/
{
    if (this->space() < length)          /* enough room in buffer for data?   */
    {
        /* not big enough, tell buffer to    */
        /* make itself bigger, and assign    */
        /* new buffer                        */
        OrefSet(this, this->buffer, this->buffer->expand(length));
    }
    this->buffer->copyData(this->current, (char *)start, length);
 
    size_t dataLoc = this->current;      /* save start location of copied data*/
                                         /* bump pointer to end of copied     */
                                         /* data, (prepare for next copy)     */
    this->current = this->current + length;
    return dataLoc;                      /* return location of copied data    */
}
 
void   *RexxSmartBuffer::operator new(size_t size)
/******************************************************************************/
/* Function:  Create a new translator object                                  */
/******************************************************************************/
{
    return new_object(size, T_SmartBuffer);        /* get storage for a new object      */
}
 
size_t RexxSmartBuffer::space()
/******************************************************************************/
/* Function:  Return the space remaining in the buffer                        */
/******************************************************************************/
{
    return this->buffer->getBufferSize() - this->current;
}