int Book::EntryCheck( uint64 hash, const MOVE& move ){
/************************************************
定跡に指し手があるか調べる。
************************************************/
int i;
int flag;
list<BLIST>::iterator ib;
list<MLIST>::iterator im;
list<MLIST>* pmlist;
unsigned int mv;
i = (int)( hash & BOOK_HASH_MASK );
// 局面が既にあるか調べる。
flag = 0;
for( ib = blist[i].begin() ; ib != blist[i].end() ; ++ib ){
if( (*ib).hash == hash ){
flag = 1;
break;
}
}
if( flag == 0 )
return 0;
// 指し手を探す。
pmlist = &(*ib).mlist;
for( im = pmlist->begin() ; im != pmlist->end() ; ++im ){
mv = move.Export();
if( (*im).mv == mv )
return 1;
}
return 0;
}
ENTRY_TYPE HashTable::Entry( uint64 hash, int rdepth,
int alpha, int beta, int value, const MOVE& move ) {
/************************************************
ハッシュテーブルに追加
************************************************/
HASH_TABLE table;
ENTRY_TYPE ret = HASH_NOENTRY;
if( !GetTable( hash, table ) || table.rdepth <= rdepth ) {
if( table.hash == hash ) {
ret = HASH_OVERWRITE;
}
else {
if( table.cnt == cnt ) {
ret = HASH_COLLISION;
}
else {
ret = HASH_ENTRY;
}
table.first = 0U;
}
table.cnt = cnt;
table.hash = hash;
if( value >= VMAX || value <= VMIN ) {
table.rdepth = INT_MAX;
table.type = VALUE_EXACT;
}
else {
table.rdepth = rdepth;
if( value >= beta ) {
table.type = VALUE_LOWER;
}
else if( value <= alpha ) {
table.type = VALUE_UPPER;
}
else {
table.type = VALUE_EXACT;
}
}
table.value = value;
unsigned m = move.Export();
if( table.first != m ) {
table.second = table.first;
}
else {
table.second = 0U;
}
table.first = m;
SetTable( table );
}
return ret;
}
