59 lines
2.1 KiB
C++
59 lines
2.1 KiB
C++
// Filename: nativeNumericData.h
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// Created by: drose (09May01)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) Carnegie Mellon University. All rights reserved.
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//
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// All use of this software is subject to the terms of the revised BSD
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// license. You should have received a copy of this license along
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// with this source code in a file named "LICENSE."
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//
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////////////////////////////////////////////////////////////////////
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#ifndef NATIVENUMERICDATA_H
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#define NATIVENUMERICDATA_H
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#include "dtoolbase.h"
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#include <string.h> // for memcpy()
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////////////////////////////////////////////////////////////////////
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// Class : NativeNumericData
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// Description : NativeNumericData and ReversedNumericData work
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// together to provide a sneaky interface for
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// automatically byte-swapping numbers, when necessary,
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// to transparency support big-endian and little-endian
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// architectures.
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//
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// Both of these classes provide interfaces that accept
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// a pointer to a numeric variable and the size of the
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// number, and they can append that data to the end of a
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// string, or memcpy it into another location.
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//
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// The difference is that NativeNumericData simply
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// passes everything through unchanged, while
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// ReversedNumericData always byte-swaps everything.
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// Otherwise, they have the same interface.
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//
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// The transparent part comes from LittleEndian and
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// BigEndian, which are typedeffed to be one of these or
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// the other, according to the machine's architecture.
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////////////////////////////////////////////////////////////////////
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class EXPCL_DTOOLCONFIG NativeNumericData {
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public:
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INLINE NativeNumericData(const void *data, size_t length);
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INLINE NativeNumericData(const void *data, size_t start, size_t length);
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INLINE void store_value(void *dest, size_t length) const;
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INLINE const void *get_data() const;
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private:
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const void *_source;
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};
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#include "nativeNumericData.I"
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#endif
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