X-Git-Url: http://winboard.nl/cgi-bin?a=blobdiff_plain;f=book.c;h=090ae1b269ad8a38aa3334191147b79e90a01080;hb=e921ccb3b79c9cfc5657e715eb50b5d9ed298db8;hp=caa61b178458be189ba5d0e67f85e6b5f7416ae8;hpb=b3045790c3486c4ddcaeb6525874f300085a7deb;p=xboard.git

diff --git a/book.c b/book.c
index caa61b1..090ae1b 100644
--- a/book.c
+++ b/book.c
@@ -484,8 +484,11 @@ find_key (FILE *f, uint64 key, entry_t *entry)
     }
 }
 
+static int xStep[] = { 0, 1, 1, 1, 0,-1,-1,-1 };
+static int yStep[] = { 1, 1, 0,-1,-1,-1, 0, 1 };
+
 void
-move_to_string (char move_s[6], uint16 move)
+move_to_string (char move_s[20], uint16 move)
 {
     int f,fr,ff,t,tr,tf,p;
     int width = BOARD_RGHT - BOARD_LEFT, size; // allow for alternative board formats
@@ -499,10 +502,7 @@ move_to_string (char move_s[6], uint16 move)
     t  = move % size;
     tr = t / width;
     tf = t % width;
-    move_s[0] = ff + 'a';
-    move_s[1] = fr + '1' - (BOARD_HEIGHT > 9);
-    move_s[2] = tf + 'a';
-    move_s[3] = tr + '1' - (BOARD_HEIGHT > 9);
+    snprintf(move_s, 9, "%c%d%c%d", ff + 'a', fr + 1 - (BOARD_HEIGHT == 10), tf + 'a', tr + 1 - (BOARD_HEIGHT == 10));
 
     if(IS_SHOGI(gameInfo.variant) && p) {
 	if(p == 2) p = 10;     // Lion moves, for boards so big that 10 is out of range
@@ -515,16 +515,20 @@ move_to_string (char move_s[6], uint16 move)
 	move_s[1] = '@';     // drop symbol
 	p = 0;
     } else if(p == 10) { // decode Lion move
-	
+	int i = t & 7, j = t >> 3 & 7;
+	tf = ff + xStep[i] + xStep[j]; tr = fr + yStep[i] + yStep[j]; // calculate true to-square
+	snprintf(move_s, 20, "%c%d%c%d,%c%d%c%d", ff + 'a', fr + 1 - (BOARD_HEIGHT == 10),
+						  ff + xStep[i] + 'a', fr + yStep[i] + 1 - (BOARD_HEIGHT == 10),
+						  ff + xStep[i] + 'a', fr + yStep[i] + 1 - (BOARD_HEIGHT == 10),
+						  tf + 'a', tr + 1 - (BOARD_HEIGHT == 10) );
 	p = 0;
     }
 
     // add promotion piece, if any
     if(p){
-        move_s[4] = promote_pieces[p];
-        move_s[5] = '\0';
-    }else{
-        move_s[4] = '\0';
+	int len = strlen(move_s);
+        move_s[len] = promote_pieces[p];
+        move_s[len+1] = '\0';
     }
 
     if(gameInfo.variant != VariantNormal) return;
@@ -575,6 +579,8 @@ GetBookMoves (FILE *f, int moveNr, entry_t entries[], int max)
     return count;
 }
 
+static int dirty;
+
 int
 ReadFromBookFile (int moveNr, char *book, entry_t entries[])
 {   // retrieve all entries for given position from book in 'entries', return number.
@@ -582,6 +588,7 @@ ReadFromBookFile (int moveNr, char *book, entry_t entries[])
     static char curBook[MSG_SIZ];
 
     if(book == NULL) return -1;
+    if(dirty) { if(f) fclose(f); dirty = 0; f = NULL; }
     if(!f || strcmp(book, curBook)){ // keep book file open until book changed
 	strncpy(curBook, book, MSG_SIZ);
 	if(f) fclose(f);
@@ -731,8 +738,10 @@ MovesToText(int count, entry_t *entries)
 	for(i=0; i<count; i++) totalWeight += entries[i].weight;
 	*p = 0;
 	for(i=0; i<count; i++) {
-	    char buf[MSG_SIZ];
+	    char buf[MSG_SIZ], c1, c2, c3; int i1, i2, i3;
 	    move_to_string(algMove, entries[i].move);
+	    if(sscanf(algMove, "%c%d%*c%*d,%c%d%c%d", &c1, &i1, &c2, &i2, &c3, &i3) == 6)
+		snprintf(algMove, 12, "%c%dx%c%d-%c%d", c1, i1, c2, i2, c3, i3); // cast double-moves in format SAN parser will understand
 	    buf[0] = NULLCHAR;
 	    if(entries[i].learnCount || entries[i].learnPoints)
 		snprintf(buf, MSG_SIZ, " {%d/%d}", entries[i].learnPoints, entries[i].learnCount);
@@ -753,6 +762,18 @@ CoordsToMove (int fromX, int fromY, int toX, int toY, char promoChar)
     if(!promote_pieces[i]) i = 0;
     else if(i == 9 && gameInfo.variant == VariantChu) i = 1; // on 12x12 only 3 promotion codes available, so use 1 to indicate promotion
     if(fromY == DROP_RANK) i = 9, from = ToUpper(PieceToChar(fromX)) - '@';
+    if(killX >= 0) { // multi-leg move
+	int dx = killX - fromX, dy = killY - fromY;
+	for(i=0; i<8; i++) if(dx == xStep[i] && dy == yStep[i]) {
+	    int j;
+	    dx = toX - killX; dy = toY - killY;
+	    for(j=0; j<8; j++) if(dx == xStep[j] && dy == yStep[j]) {
+		// special encoding in to-square, with promoType = 2. Assumes board >= 64 squares!
+		return i + 8*j + (2 * width * BOARD_HEIGHT + from) * width * BOARD_HEIGHT;
+	    }
+	}
+	i = 0; // if not a valid Lion move, ignore kill-square and promoChar
+    }
     return to + (i * width * BOARD_HEIGHT + from) * width * BOARD_HEIGHT;
 }
 
@@ -773,6 +794,7 @@ TextToMoves (char *text, int moveNum, entry_t *entries)
 	    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 && moveType != WhiteDrop && moveType != BlackDrop
+						&& moveType != FirstLeg
                                                 && moveType != WhitePromotion && moveType != BlackPromotion
                                                 && moveType != WhiteCapturesEnPassant && moveType != BlackCapturesEnPassant
                                                 && moveType != WhiteKingSideCastle && moveType != BlackKingSideCastle
@@ -784,7 +806,7 @@ TextToMoves (char *text, int moveNum, entry_t *entries)
 		entries[count].learnPoints = 0;
 		entries[count].learnCount  = 0;
 	    }
-	    entries[count].move = CoordsToMove(fromX, fromY, toX, toY, promoChar);
+	    entries[count].move = CoordsToMove(fromX, fromY, toX, toY, promoChar); killX = killY = -1;
 	    entries[count].key  = hashKey;
 	    entries[count].weight = w;
 	    count++;
@@ -873,6 +895,7 @@ SaveToBook (char *text)
 	    writepos += len2;
 	} while(len1);
     }
+    dirty = 1;
     fclose(f);
 }