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#include "stdafx.h"
#include "ByteArrayOutputStream.h"
// Creates a new byte array output stream. The buffer capacity is initially 32 bytes, though its size increases if necessary.
ByteArrayOutputStream::ByteArrayOutputStream()
{
count = 0;
buf = byteArray(32);
}
// Creates a new byte array output stream, with a buffer capacity of the specified size, in bytes.
// Parameters:
// size - the initial size.
ByteArrayOutputStream::ByteArrayOutputStream(unsigned int size)
{
count = 0;
buf = byteArray(size);
}
ByteArrayOutputStream::~ByteArrayOutputStream()
{
if (buf.data != NULL)
{
delete[] buf.data;
}
}
// Writes the specified byte to this byte array output stream.
// Parameters:
// b - the byte to be written.
void ByteArrayOutputStream::write(unsigned int b)
{
// If we will fill the buffer we need to make it bigger
if (count + 1 >= buf.length)
{
buf.resize(buf.length * 2);
}
buf[count] = (byte)b;
count++;
}
// Writes b.length bytes from the specified byte array to this output stream.
// The general contract for write(b) is that it should have exactly the same effect as the call write(b, 0, b.length).
void ByteArrayOutputStream::write(byteArray b)
{
write(b, 0, b.length);
}
// Writes len bytes from the specified byte array starting at offset off to this byte array output stream.
// Parameters:
// b - the data.
// off - the start offset in the data.
// len - the number of bytes to write.
void ByteArrayOutputStream::write(byteArray b, unsigned int offset, unsigned int length)
{
if (offset > b.length || length > b.length - offset)
{
return;
}
if (length > 0xFFFFFFFF - count)
{
return;
}
// If we will fill the buffer we need to make it bigger
if (count + length >= buf.length)
{
unsigned int newSize = (std::max)(count + length + 1, buf.length * 2);
if (newSize <= buf.length)
{
return;
}
buf.resize(newSize);
}
XMemCpy(&buf[count], &b[offset], length);
count += length;
}
// Closing a ByteArrayOutputStream has no effect.
// The methods in this class can be called after the stream has been closed without generating an IOException.
void ByteArrayOutputStream::close()
{
}
// Creates a newly allocated byte array. Its size is the current size of this output stream and the valid contents of the buffer have been copied into it.
// Returns:
// the current contents of this output stream, as a byte array.
byteArray ByteArrayOutputStream::toByteArray()
{
byteArray out(count);
memcpy(out.data, buf.data, count);
return out;
}
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