#include "common.h"
#include "backend.h"
+#include "moves.h"
#ifdef _MSC_VER
typedef unsigned __int64 uint64;
int GetBookMoves(int moveNr, char *book, entry_t entries[])
{ // retrieve all entries for given position from book in 'entries', return number.
- FILE *f;
+ static FILE *f = NULL;
+ static char curBook[MSG_SIZ];
entry_t entry;
int offset;
uint64 key;
if(book == NULL || moveNr >= 2*appData.bookDepth) return -1;
// if(gameInfo.variant != VariantNormal) return -1; // Zobrist scheme only works for normal Chess, so far
- f=fopen(book,"rb");
+ if(!f || strcmp(book, curBook)){ // keep book file open until book changed
+ strncpy(curBook, book, MSG_SIZ);
+ if(f) fclose(f);
+ f = fopen(book,"rb");
+ }
if(!f){
DisplayError("Polyglot book not valid", 0);
appData.usePolyglotBook = FALSE;
offset=find_key(f, key, &entry);
if(entry.key != key) {
- fclose(f);
return FALSE;
}
entries[0] = entry;
if(count == MOVE_BUF) break;
entries[count++] = entry;
}
- fclose(f);
return count;
}
for(i=0; i<count; i++){
total_weight += entries[i].weight;
}
+ if(total_weight == 0) return NULL; // force book miss rather than playing moves with weight 0.
j = (random() & 0xFFF) * total_weight >> 12; // create random < total_weight
total_weight = 0;
for(i=0; i<count; i++){
float dummy;
int width = BOARD_RGHT - BOARD_LEFT;
+ entries[0].key = hashKey; // make sure key is returned even if no moves
while((i=sscanf(text, "%f%%%d", &dummy, &w))==2 || (i=sscanf(text, "%d", &w))==1) {
if(i == 2) text = strchr(text, '%') + 1; // skip percentage
if(w == 1) text = strstr(text, "1 ") + 2; // skip weight that could be recognized as move number one
valid = ParseOneMove(text, moveNum, &moveType, &fromX, &fromY, &toX, &toY, &promoChar);
text = strstr(text, yy_textstr) + strlen(yy_textstr); // skip what we parsed
if(!valid || moveType != NormalMove) continue;
- if(*text == ' ' && sscanf(text+1, "{%d/%d}", &entries[count].learnPoints, &entries[count].learnCount) == 2) {
+ if(*text == ' ' && sscanf(text+1, "{%hd/%hd}", &entries[count].learnPoints, &entries[count].learnCount) == 2) {
text = strchr(text+1, '}') + 1;
} else {
entries[count].learnPoints = 0;
int count = TextToMoves(text, currentMove, entries);
int offset, i, len1=0, len2, readpos=0, writepos=0;
FILE *f;
- if(!count) return;
+ if(!count && !currentCount) return;
f=fopen(appData.polyglotBook, "rb+");
if(!f){ DisplayError("Polyglot book not valid", 0); return; }
offset=find_key(f, entries[0].key, &entry);
- if(entries[0].key != entry.key) {
+ if(entries[0].key != entry.key && currentCount) {
DisplayError("Hash keys are different", 0);
fclose(f);
return;
}
fclose(f);
}
+