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Introduce SimpleHash class

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And use it for pawns and material infos.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2011-01-07 10:34:16 +01:00
parent 803c8e0be3
commit 0ddf84870a
5 changed files with 47 additions and 71 deletions
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27
src/material.cpp
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@@ -132,28 +132,8 @@ template<> const SFMap& EndgameFunctions::get<SF>() const { return maps.second;
//// Functions
////
/// MaterialInfoTable c'tor and d'tor, called once by each thread
MaterialInfoTable::MaterialInfoTable() {
entries = new MaterialInfo[MaterialTableSize];
funcs = new EndgameFunctions();
if (!entries || !funcs)
{
cerr << "Failed to allocate " << MaterialTableSize * sizeof(MaterialInfo)
<< " bytes for material hash table." << endl;
exit(EXIT_FAILURE);
}
memset(entries, 0, MaterialTableSize * sizeof(MaterialInfo));
}
MaterialInfoTable::~MaterialInfoTable() {
delete funcs;
delete [] entries;
}
MaterialInfoTable::MaterialInfoTable() { funcs = new EndgameFunctions(); }
MaterialInfoTable::~MaterialInfoTable() { delete funcs; }
/// MaterialInfoTable::game_phase() calculates the phase given the current
/// position. Because the phase is strictly a function of the material, it
@@ -181,8 +161,7 @@ Phase MaterialInfoTable::game_phase(const Position& pos) {
MaterialInfo* MaterialInfoTable::get_material_info(const Position& pos) {
Key key = pos.get_material_key();
unsigned index = unsigned(key & (MaterialTableSize - 1));
MaterialInfo* mi = entries + index;
MaterialInfo* mi = find(key);
// If mi->key matches the position's material hash key, it means that we
// have analysed this material configuration before, and we can simply