00001 // Filename: nativeNumericData.I 00002 // Created by: drose (09May01) 00003 // 00004 //////////////////////////////////////////////////////////////////// 00005 // 00006 // PANDA 3D SOFTWARE 00007 // Copyright (c) 2001, Disney Enterprises, Inc. All rights reserved 00008 // 00009 // All use of this software is subject to the terms of the Panda 3d 00010 // Software license. You should have received a copy of this license 00011 // along with this source code; you will also find a current copy of 00012 // the license at http://www.panda3d.org/license.txt . 00013 // 00014 // To contact the maintainers of this program write to 00015 // panda3d@yahoogroups.com . 00016 // 00017 //////////////////////////////////////////////////////////////////// 00018 00019 00020 //////////////////////////////////////////////////////////////////// 00021 // Function: NativeNumericData::Constructor 00022 // Access: Public 00023 // Description: This constructor accepts the address of a numeric 00024 // variable, and its sizeof. 00025 //////////////////////////////////////////////////////////////////// 00026 INLINE NativeNumericData:: 00027 NativeNumericData(const void *data, size_t) : 00028 _source(data) 00029 { 00030 } 00031 00032 //////////////////////////////////////////////////////////////////// 00033 // Function: NativeNumericData::Constructor 00034 // Access: Public 00035 // Description: This constructor accepts a pointer to a data array 00036 // containing a packed numeric value, the offset within 00037 // the array at which the numeric value starts, and the 00038 // size of the numeric value. 00039 // 00040 // It is essential that the array not be destructed or 00041 // modified as long as the NumericData object remains; 00042 // it may just store a pointer into that string's 00043 // internal buffer. 00044 //////////////////////////////////////////////////////////////////// 00045 INLINE NativeNumericData:: 00046 NativeNumericData(const void *data, size_t start, size_t) { 00047 _source = (void *)((const char *)data + start); 00048 } 00049 00050 //////////////////////////////////////////////////////////////////// 00051 // Function: NativeNumericData::store_value 00052 // Access: Public 00053 // Description: Copies the data, with byte reversal if appropriate, 00054 // into the indicated numeric variable, whose address 00055 // and sizeof are given. 00056 //////////////////////////////////////////////////////////////////// 00057 INLINE void NativeNumericData:: 00058 store_value(void *dest, size_t length) const { 00059 memcpy(dest, _source, length); 00060 } 00061 00062 //////////////////////////////////////////////////////////////////// 00063 // Function: NativeNumericData::get_data 00064 // Access: Public 00065 // Description: Returns the pointer to the first byte of the data, 00066 // either reversed or nonreversed, as appropriate. 00067 //////////////////////////////////////////////////////////////////// 00068 INLINE const void *NativeNumericData:: 00069 get_data() const { 00070 return _source; 00071 }
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