Obey san feature when sending book moves

Book moves were always sent in long algebraic, even when the engine had
said it wanted to receive SAN.

diff --git a/backend.c b/backend.c
index 8916211..da18261 100644 (file)
--- a/backend.c
+++ b/backend.c
@@ -7574,8 +7574,23 @@ char *SendMoveToBookUser(int moveNr, ChessProgramState *cps, int initial)
     if(bookHit) {
        // after a book hit we never send 'go', and the code after the call to this routine
        // has '&& !bookHit' added to suppress potential sending there (based on 'firstMove').
-       char buf[MSG_SIZ];
-       snprintf(buf, MSG_SIZ, "%s%s\n", (cps->useUsermove ? "usermove " : ""), bookHit); // force book move into program supposed to play it
+       char buf[MSG_SIZ], *move = bookHit;
+       if(cps->useSAN) {
+           int fromX, fromY, toX, toY;
+           char promoChar;
+           ChessMove moveType;
+           move = buf + 30;
+           if (ParseOneMove(bookHit, forwardMostMove, &moveType,
+                                &fromX, &fromY, &toX, &toY, &promoChar)) {
+               (void) CoordsToAlgebraic(boards[forwardMostMove],
+                                   PosFlags(forwardMostMove),
+                                   fromY, fromX, toY, toX, promoChar, move);
+           } else {
+               if(appData.debugMode) fprintf(debugFP, "Book move could not be parsed\n");
+               bookHit = NULL;
+           }
+       }
+       snprintf(buf, MSG_SIZ, "%s%s\n", (cps->useUsermove ? "usermove " : ""), move); // force book move into program supposed to play it
        SendToProgram(buf, cps);
        if(!initial) firstMove = FALSE; // normally we would clear the firstMove condition after return & sending 'go'
     } else if(initial) { // 'go' was needed irrespective of firstMove, and it has to be done in this routine