70 lines
1.6 KiB
Text
70 lines
1.6 KiB
Text
|
/**
|
||
|
|
* PANDA 3D SOFTWARE
|
||
|
|
* Copyright (c) Carnegie Mellon University. All rights reserved.
|
||
|
|
*
|
||
|
|
* All use of this software is subject to the terms of the revised BSD
|
||
|
|
* license. You should have received a copy of this license along
|
||
|
|
* with this source code in a file named "LICENSE."
|
||
|
|
*
|
||
|
|
* @file checksumHashGenerator.I
|
||
|
|
* @author drose
|
||
|
|
* @date 2001-05-14
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef _WIN32
|
||
|
|
// Needed for PtrToLong, below
|
||
|
|
#ifndef WIN32_LEAN_AND_MEAN
|
||
|
|
#define WIN32_LEAN_AND_MEAN 1
|
||
|
|
#endif
|
||
|
|
#include <windows.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds another integer to the hash so far. This function should be
|
||
|
|
* overridden in base classes; this is the principle implementation of the
|
||
|
|
* HashGenerator.
|
||
|
|
*/
|
||
|
|
INLINE void ChecksumHashGenerator::
|
||
|
|
add_int(long sum) {
|
||
|
|
_hash += (size_t)sum;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds a boolean flag.
|
||
|
|
*/
|
||
|
|
INLINE void ChecksumHashGenerator::
|
||
|
|
add_bool(bool flag) {
|
||
|
|
add_int(flag);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds a floating-point number, first converting it to fixed point by
|
||
|
|
* dividing it by the indicated threshold.
|
||
|
|
*/
|
||
|
|
INLINE void ChecksumHashGenerator::
|
||
|
|
add_fp(float number, float threshold) {
|
||
|
|
add_int((long)(number / threshold));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds a floating-point number, first converting it to fixed point by
|
||
|
|
* dividing it by the indicated threshold.
|
||
|
|
*/
|
||
|
|
INLINE void ChecksumHashGenerator::
|
||
|
|
add_fp(double number, double threshold) {
|
||
|
|
add_int((long)(number / threshold));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds a pointer, derived simply by casting the pointer to an integer. This
|
||
|
|
* should be good enough even on architectures for which this cast is lossy.
|
||
|
|
*/
|
||
|
|
INLINE void ChecksumHashGenerator::
|
||
|
|
add_pointer(void *ptr) {
|
||
|
|
#ifdef _WIN32
|
||
|
|
add_int(PtrToLong(ptr));
|
||
|
|
#else
|
||
|
|
add_int((long)ptr);
|
||
|
|
#endif
|
||
|
|
}
|