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