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/*
* palm-db-tools: Encapsulate "blocks" of data.
* Copyright (C) 2000 by Tom Dyas (tdyas@users.sourceforge.net)
*
* The PalmLib::Block class represents a generic block of data. It is
* used to simplify passing arrays of pi_char_t around.
*/
#include <cstring>
#include "Block.h"
void PalmLib::Block::reserve(PalmLib::Block::size_type new_size)
{
if (new_size > capacity()) {
// Allocate a new buffer containing a copy of the old with the
// remainder zero'ed out.
pointer new_data = new pi_char_t[new_size];
memcpy(new_data, m_data, m_size);
memset(new_data + m_size, 0, new_size - m_size);
// Replace the existing buffer.
delete [] m_data;
m_data = new_data;
m_size = new_size;
}
}
void PalmLib::Block::resize(size_type new_size)
{
if (new_size < m_size) {
// Copy the data that will remain to a new buffer and switch to it.
pointer new_data = new pi_char_t[new_size];
memcpy(new_data, m_data, new_size);
// Replace the existing buffer.
delete [] m_data;
m_data = new_data;
m_size = new_size;
} else if (new_size > m_size) {
// Copy the data that will remain to a new buffer and switch to it.
pointer new_data = new pi_char_t[new_size];
memcpy(new_data, m_data, m_size);
memset(new_data + m_size, 0, new_size - m_size);
// Replace the existing buffer.
delete [] m_data;
m_data = new_data;
m_size = new_size;
}
}
void PalmLib::Block::assign(PalmLib::Block::const_pointer data,
const PalmLib::Block::size_type size)
{
clear();
if (data && size > 0) {
m_size = size;
m_data = new pi_char_t[m_size];
memcpy(m_data, data, m_size);
}
}
void PalmLib::Block::assign(const PalmLib::Block::size_type size,
const PalmLib::Block::value_type value)
{
clear();
if (size > 0) {
m_size = size;
m_data = new pi_char_t[m_size];
memset(m_data, value, m_size);
}
}
bool operator == (const PalmLib::Block& lhs, const PalmLib::Block& rhs)
{
if (lhs.size() == rhs.size()) {
if (lhs.data()) {
if (memcmp(lhs.data(), rhs.data(), lhs.size()) != 0)
return false;
}
return true;
}
return false;
}
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