00001 // Filename: checksumHashGenerator.I 00002 // Created by: drose (14May01) 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: ChecksumHashGenerator::add_int 00022 // Access: Public 00023 // Description: Adds another integer to the hash so far. This 00024 // function should be overridden in base classes; this 00025 // is the principle implementation of the HashGenerator. 00026 //////////////////////////////////////////////////////////////////// 00027 INLINE void ChecksumHashGenerator:: 00028 add_int(int sum) { 00029 _hash += (size_t)sum; 00030 } 00031 00032 //////////////////////////////////////////////////////////////////// 00033 // Function: ChecksumHashGenerator::add_bool 00034 // Access: Public 00035 // Description: Adds a boolean flag. 00036 //////////////////////////////////////////////////////////////////// 00037 INLINE void ChecksumHashGenerator:: 00038 add_bool(bool flag) { 00039 add_int(flag); 00040 } 00041 00042 //////////////////////////////////////////////////////////////////// 00043 // Function: ChecksumHashGenerator::add_fp 00044 // Access: Public 00045 // Description: Adds a floating-point number, first converting it to 00046 // fixed point by dividing it by the indicated 00047 // threshold. 00048 //////////////////////////////////////////////////////////////////// 00049 INLINE void ChecksumHashGenerator:: 00050 add_fp(float number, float threshold) { 00051 add_int((int)(number / threshold)); 00052 } 00053 00054 //////////////////////////////////////////////////////////////////// 00055 // Function: ChecksumHashGenerator::add_fp 00056 // Access: Public 00057 // Description: Adds a floating-point number, first converting it to 00058 // fixed point by dividing it by the indicated 00059 // threshold. 00060 //////////////////////////////////////////////////////////////////// 00061 INLINE void ChecksumHashGenerator:: 00062 add_fp(double number, double threshold) { 00063 add_int((int)(number / threshold)); 00064 } 00065 00066 //////////////////////////////////////////////////////////////////// 00067 // Function: ChecksumHashGenerator::add_pointer 00068 // Access: Public 00069 // Description: Adds a pointer, derived simply by casting the pointer 00070 // to an integer. This should be good enough even on 00071 // architectures for which this cast is lossy. 00072 //////////////////////////////////////////////////////////////////// 00073 INLINE void ChecksumHashGenerator:: 00074 add_pointer(void *ptr) { 00075 add_int((int)ptr); 00076 }
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