From 7295e7b8f71c001f64930229b3d99cf8b2245a9e Mon Sep 17 00:00:00 2001
From: H.G. Muller <h.g.muller@hccnet.nl>
Date: Tue, 1 Apr 2014 18:20:29 +0200
Subject: [PATCH] Allow pseudo-engines to adjust the clocks

Implement new options -first/secondPseudo, which declare the corresponding
engine to be a pseudo-engine, which will then be granted super-powers
through some new engine->GUI commands. For instance, to adjust the time
remaining on the GUI clocks through wtime and btime commands (using msec).
---
 args.h    |    2 ++
 backend.c |    6 ++++++
 backend.h |    1 +
 common.h  |    1 +
 4 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/args.h b/args.h
index e8ef298..19324d7 100644
--- a/args.h
+++ b/args.h
@@ -681,6 +681,8 @@ ArgDescriptor argDescriptors[] = {
   { "scoreWhite", ArgBoolean, (void *) &appData.scoreWhite, TRUE, FALSE },
   { "evalZoom", ArgInt, (void *) &appData.zoom, TRUE, (ArgIniType) 1 },
   { "evalThreshold", ArgInt, (void *) &appData.evalThreshold, TRUE, (ArgIniType) 25 },
+  { "firstPseudo", ArgTrue, (void *) &appData.pseudo[0], FALSE, FALSE },
+  { "secondPseudo", ArgTrue, (void *) &appData.pseudo[1], FALSE, FALSE },
   { "fSAN", ArgTrue, (void *) &appData.pvSAN[0], FALSE, FALSE },
   { "sSAN", ArgTrue, (void *) &appData.pvSAN[1], FALSE, FALSE },
   { "pairingEngine", ArgFilename, (void *) &appData.pairingEngine, TRUE, "" },
diff --git a/backend.c b/backend.c
index 39467ae..5771996 100644
--- a/backend.c
+++ b/backend.c
@@ -847,6 +847,7 @@ InitEngine (ChessProgramState *cps, int n)
     cps->analyzing = FALSE;
     cps->initDone = FALSE;
     cps->reload = FALSE;
+    cps->pseudo = appData.pseudo[n];
 
     /* New features added by Tord: */
     cps->useFEN960 = FALSE;
@@ -9136,6 +9137,10 @@ printf("score=%d count=%d\n",score,count);
 	   Don't use it. */
 	cps->sendTime = 0;
     }
+    if (cps->pseudo) { // [HGM] pseudo-engine, granted unusual powers
+	if (sscanf(message, "wtime %ld\n", &whiteTimeRemaining) == 1 || // adjust clock times
+	    sscanf(message, "btime %ld\n", &blackTimeRemaining) == 1   ) return;
+    }
 
     /*
      * If chess program startup fails, exit with an error message.
@@ -10841,6 +10846,7 @@ SwapEngines (int n)
     SWAP(accumulateTC, h)
     SWAP(drawDepth, h)
     SWAP(host, p)
+    SWAP(pseudo, h)
 }
 
 int
diff --git a/backend.h b/backend.h
index b304cb4..2acd187 100644
--- a/backend.h
+++ b/backend.h
@@ -343,6 +343,7 @@ typedef struct XB_CPS {
     int analyzing;
     int protocolVersion;
     int initDone;
+    int pseudo;
 
     /* Added by Tord: */
     int useFEN960;   /* 0=use "KQkq" style FENs, 1=use "HAha" style FENs */
diff --git a/common.h b/common.h
index bf26600..3d92dc0 100644
--- a/common.h
+++ b/common.h
@@ -661,6 +661,7 @@ typedef struct {
     int adjudicateDrawMoves;
     Boolean autoDisplayComment;
     Boolean autoDisplayTags;
+    Boolean pseudo[ENGINES]; /* [HGM] pseudo-engines */
     Boolean isUCI[ENGINES];
     Boolean hasOwnBookUCI[ENGINES];
     char * adapterCommand;
-- 
1.7.0.4