Loading...
Searching...
No Matches
EST_TBuffer.cc
/************************************************************************/
/* */
/* Centre for Speech Technology Research */
/* University of Edinburgh, UK */
/* Copyright (c) 1996,1997 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* THE UNIVERSITY OF EDINBURGH AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL THE UNIVERSITY OF EDINBURGH NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* */
/* Author: Richard Caley (rjc@cstr.ed.ac.uk) */
/* Date: Tue Aug 26 1997 */
/* -------------------------------------------------------------------- */
/* Extending buffers, i.e. arrays which grow as needed. I got fed up */
/* of writing this code all over the place. */
/* */
/*************************************************************************/
#include <cstdlib>
#include <cstdio>
#include <cstring>
#include "EST_unix.h"
#include "EST_TBuffer.h"
template<class T>
EST_TBuffer<T>::EST_TBuffer(unsigned int size, int step)
{
p_buffer = NULL;
init(size, step);
}
template<class T>
EST_TBuffer<T>::~EST_TBuffer(void)
{
// save the buffer if we have a slot
for(int i=0; i<TBUFFER_N_OLD; i++)
if (EST_old_buffers[i].mem == NULL)
{
EST_old_buffers[i].mem = p_buffer;
EST_old_buffers[i].size = p_size*sizeof(T);
p_buffer = NULL;
p_size =0;
break;
}
if (p_buffer)
{
delete[] p_buffer;
p_buffer = NULL;
p_size = 0;
}
}
template<class T>
void EST_TBuffer<T>::init(unsigned int size, int step)
{
for(int i=0; i<TBUFFER_N_OLD; i++)
if (EST_old_buffers[i].size/sizeof(T) >= size)
{
p_buffer = (T *)EST_old_buffers[i].mem;
p_size = EST_old_buffers[i].size/sizeof(T);
EST_old_buffers[i].mem = NULL;
EST_old_buffers[i].size = 0;
break;
}
if (p_buffer == NULL)
{
p_buffer = new T[size];
p_size = size;
}
p_step = step;
}
template<class T>
void EST_TBuffer<T>::expand_to(unsigned int req_size, bool copy)
{
if (req_size > p_size)
{
unsigned int new_size = p_size;
while(new_size < req_size)
if (p_step >0)
new_size += p_step;
else
new_size = (int)(new_size*(float)(-p_step)/100.0);
T * new_buffer = new T[new_size];
if (copy)
memcpy(new_buffer, p_buffer, p_size*sizeof(T));
delete[] p_buffer;
p_buffer = new_buffer;
p_size = new_size;
}
}
template<class T>
void EST_TBuffer<T>::expand_to(unsigned int req_size, const T &set_to, int howmany)
{
if (req_size > p_size)
{
unsigned int new_size = p_size;
while(new_size < req_size)
if (p_step >0)
new_size += p_step;
else
new_size = (int)(new_size*(float)(-p_step)/100.0);
T * new_buffer = new T[new_size];
if (howmany<0)
howmany=new_size;
for(int i=0; i<howmany; i++)
new_buffer[i] = set_to;
delete[] p_buffer;
p_buffer = new_buffer;
p_size = new_size;
}
}
template<class T>
void EST_TBuffer<T>::set(const T &set_to, int howmany)
{
if (howmany < 0)
howmany = p_size;
for(int i=0; i<howmany; i++)
p_buffer[i] = set_to;
}
EST_TBuffer::~EST_TBuffer
~EST_TBuffer(void)
Destructor. Places the memory in EST_old_buffers[] for re-use if there is room.
Definition EST_TBuffer.cc:56
EST_TBuffer::set
void set(const TYPE &set_to, int howmany=-1)
Set to the given value. By default sets all values.
Definition EST_TBuffer.cc:149
EST_TBuffer::EST_TBuffer
EST_TBuffer(unsigned int size=TBUFFER_DEFAULT_SIZE, int step=TBUFFER_DEFAULT_STEP)
Definition EST_TBuffer.cc:49