54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
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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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* @file nativeNumericData.h
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* @author drose
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* @date 2001-05-09
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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 "numeric_types.h"
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#include <string.h> // for memcpy()
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/**
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* NativeNumericData and ReversedNumericData work together to provide a sneaky
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* interface for automatically byte-swapping numbers, when necessary, to
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* transparency support big-endian and little-endian architectures.
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*
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* Both of these classes provide interfaces that accept a pointer to a numeric
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* variable and the size of the number, and they can append that data to the
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* end of a string, or memcpy it into another location.
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*
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* The difference is that NativeNumericData simply passes everything through
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* unchanged, while 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 BigEndian, which are
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* typedeffed to be one of these or the other, according to the machine's
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* architecture.
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*/
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class EXPCL_DTOOL_PRC 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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