Build in limited EPD capability for engine fingerprintig

The new option -finger FILENAME causes games to end after the first
move, where the initial position plus the move will then be written to
the specified file in EPD format. This can be used in match mode with
a set of start positions or opening lines to record the best moves of
an engine on a set of positions (as in CSVN fingerprinting).

diff --git a/args.h b/args.h
index 8c52303..01dc439 100644 (file)
--- a/args.h
+++ b/args.h
@@ -597,6 +597,7 @@ ArgDescriptor argDescriptors[] = {
   { "useBorder", ArgBoolean, (void *) &appData.useBorder, TRUE, (ArgIniType) FALSE },
   { "ub", ArgBoolean, (void *) &appData.useBorder, FALSE, INVALID },
   { "border", ArgFilename, (void *) &appData.border, TRUE, (ArgIniType) "" },
+  { "finger", ArgFilename, (void *) &appData.finger, FALSE, (ArgIniType) "" },
 
   // [HGM] tournament options
   { "tourneyFile", ArgFilename, (void *) &appData.tourneyFile, FALSE, (ArgIniType) "" },

diff --git a/backend.c b/backend.c
index efe3b0e..2156091 100644 (file)
--- a/backend.c
+++ b/backend.c
@@ -8305,6 +8305,17 @@ FakeBookMove: // [HGM] book: we jump here to simulate machine moves after book h
 
        MakeMove(fromX, fromY, toX, toY, promoChar);/*updates forwardMostMove*/
 
+        /* Test suites abort the 'game' after one move */
+        if(*appData.finger) {
+           static FILE *f;
+           char *fen = PositionToFEN(backwardMostMove, NULL, 0); // no counts in EPD
+           if(!f) f = fopen(appData.finger, "w");
+           if(f) fprintf(f, "%s bm %s;\n", fen, parseList[backwardMostMove]), fflush(f);
+           else { DisplayFatalError("Bad output file", errno, 0); return; }
+           free(fen);
+           GameEnds(GameUnfinished, NULL, GE_XBOARD);
+        }
+
         /* [AS] Adjudicate game if needed (note: remember that forwardMostMove now points past the last move) */
         if( gameMode == TwoMachinesPlay && adjudicateLossThreshold != 0 && forwardMostMove >= adjudicateLossPlies ) {
             int count = 0;

diff --git a/common.h b/common.h
index 049d428..d56dbf9 100644 (file)
--- a/common.h
+++ b/common.h
@@ -657,6 +657,7 @@ typedef struct {
 
     char *serverFileName;
     char *serverMovesName;
+    char *finger;
     Boolean suppressLoadMoves;
     int serverPause;
     int timeOdds[ENGINES];