ByteOrderDataInStream.h
/**********************************************************************
*
* GEOS - Geometry Engine Open Source
* http://geos.osgeo.org
*
* Copyright (C) 2005-2006 Refractions Research Inc.
* Copyright (C) 2001-2002 Vivid Solutions Inc.
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU Lesser General Public Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
**********************************************************************
*
* Last port: io/ByteOrderDataInStream.java rev. 1.1 (JTS-1.10)
*
**********************************************************************/
#pragma once
#include <geos/export.h>
#include <geos/io/ParseException.h>
#include <geos/io/ByteOrderValues.h>
#include <geos/util/Machine.h> // for getMachineByteOrder
#include <cstdint>
#include <iosfwd> // ostream, istream (if we remove inlines)
namespace geos {
namespace io {
class GEOS_DLL ByteOrderDataInStream {
public:
ByteOrderDataInStream()
: ByteOrderDataInStream(nullptr, 0) {};
ByteOrderDataInStream(const unsigned char* buff, size_t buffsz)
: byteOrder(getMachineByteOrder())
, buf(buff)
, end(buff + buffsz)
{};
~ByteOrderDataInStream() {};
void setOrder(int order)
{
byteOrder = order;
};
unsigned char readByte() // throws ParseException
{
if(size() < 1) {
throw ParseException("Unexpected EOF parsing WKB");
}
auto ret = buf[0];
buf++;
return ret;
};
int32_t readInt()
{
if(size() < 4) {
throw ParseException("Unexpected EOF parsing WKB");
}
auto ret = ByteOrderValues::getInt(buf , byteOrder);
buf += 4;
return ret;
};
uint32_t readUnsigned()
{
if(size() < 4) {
throw ParseException("Unexpected EOF parsing WKB");
}
auto ret = ByteOrderValues::getUnsigned(buf , byteOrder);
buf += 4;
return ret;
};
int64_t readLong()
{
if(size() < 8) {
throw ParseException("Unexpected EOF parsing WKB");
}
auto ret = ByteOrderValues::getLong(buf, byteOrder);
buf += 8;
return ret;
};
double readDouble()
{
if(size() < 8) {
throw ParseException("Unexpected EOF parsing WKB");
}
auto ret = ByteOrderValues::getDouble(buf, byteOrder);
buf += 8;
return ret;
};
size_t size() const
{
return static_cast<size_t>(end - buf);
};
private:
int byteOrder;
const unsigned char* buf;
const unsigned char* end;
};
} // namespace io
} // namespace geos
geos::io::ParseException
Notifies a parsing error.
Definition ParseException.h:33
geos::io
Contains the interfaces for converting JTS objects to and from other formats.
Definition Geometry.h:65
geos
Basic namespace for all GEOS functionalities.
Definition geos.h:38