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* src/tgba/tgbatba.cc (state_tba_proxy::hash): Use wang32_hash.

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* src/tgba/tgbaproduct.cc (state_product::hash): Likewise.
This commit is contained in:
Alexandre Duret-Lutz 2004-11-16 15:38:22 +00:00
parent dfb832cf20
commit ee5462105b
3 changed files with 9 additions and 6 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2004-11-16 Alexandre Duret-Lutz <adl@src.lip6.fr>
* src/tgba/tgbatba.cc (state_tba_proxy::hash): Use wang32_hash.
* src/tgba/tgbaproduct.cc (state_product::hash): Likewise.
* src/misc/hashfunc.hh (wang32_hash): New file and function,
extracted from...
* src/evtgba/product.cc (evtgba_product_state::hash): ... here.

5
src/tgba/tgbaproduct.cc
View file

@ -22,6 +22,7 @@
#include "tgbaproduct.hh"
#include <string>
#include <cassert>
#include "misc/hashfunc.hh"
namespace spot
{
@ -56,8 +57,8 @@ namespace spot
size_t
state_product::hash() const
{
// We assume that size_t has at least 32bits.
return (left_->hash() << 16) + (right_->hash() & 0xFFFF);
// We assume that size_t is 32-bit wide.
return wang32_hash(left_->hash()) ^ wang32_hash(right_->hash());
}
state_product*

7
src/tgba/tgbatba.cc
View file

@ -23,6 +23,7 @@
#include "tgbatba.hh"
#include "bddprint.hh"
#include "ltlast/constant.hh"
#include "misc/hashfunc.hh"
namespace spot
{
@ -30,7 +31,7 @@ namespace spot
{
/// \brief A state for spot::tgba_tba_proxy.
///
/// This state is in fact a pair of state: the state from the tgba
/// This state is in fact a pair of states: the state from the tgba
/// automaton, and a state of the "counter" (we use a pointer
/// to the position in the cycle_acc_ list).
class state_tba_proxy: public state
@ -88,9 +89,7 @@ namespace spot
virtual size_t
hash() const
{
// We expect to have many more states than acceptance conditions.
// Hence we keep only 8 bits for acceptance conditions.
return (s_->hash() << 8) + (acc_->id() & 0xFF);
return wang32_hash(s_->hash()) ^ wang32_hash(acc_->id());
}
virtual