From 66a4d3394a1b23ab654e3fb6027ad9b5b2bd461c Mon Sep 17 00:00:00 2001
From: H.G. Muller <h.g.muller@hccnet.nl>
Date: Tue, 5 Oct 2010 21:14:08 +0200
Subject: [PATCH] Allow -timeIncrement to be a float

The increment can now be fractional seconds. The printing in
ParseTimeControl() and SendTimeControl() is done with %g format, so that
for integer increment there is backward compatibility with the old level
command.
---
 args.h    |    5 +++--
 backend.c |   17 ++++++++++++-----
 backend.h |    2 +-
 common.h  |    2 +-
 4 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/args.h b/args.h
index 00126f9..b101ef4 100644
--- a/args.h
+++ b/args.h
@@ -217,8 +217,8 @@ ArgDescriptor argDescriptors[] = {
   { "td", ArgFloat, (void *) &appData.timeDelay, FALSE, INVALID },
   { "timeControl", ArgString, (void *) &appData.timeControl, TRUE, (ArgIniType) TIME_CONTROL },
   { "tc", ArgString, (void *) &appData.timeControl, FALSE, INVALID },
-  { "timeIncrement", ArgInt, (void *) &appData.timeIncrement, TRUE, (ArgIniType) TIME_INCREMENT },
-  { "inc", ArgInt, (void *) &appData.timeIncrement, FALSE, INVALID },
+  { "timeIncrement", ArgFloat, (void *) &appData.timeIncrement, TRUE, INVALID },
+  { "inc", ArgFloat, (void *) &appData.timeIncrement, FALSE, INVALID },
   { "internetChessServerMode", ArgBoolean, (void *) &appData.icsActive, FALSE, INVALID },
   { "ics", ArgTrue, (void *) &appData.icsActive, FALSE, (ArgIniType) FALSE },
   { "xics", ArgFalse, (void *) &appData.icsActive, FALSE, INVALID },
@@ -1158,6 +1158,7 @@ InitAppData(char *lpCmdLine)
 
   // float: casting to int is not harmless, so default cannot be contained in table
   appData.timeDelay = TIME_DELAY;
+  appData.timeIncrement = TIME_INCREMENT;
 
   // some complex, platform-dependent stuff that could not be handled from table
   SetDefaultTextAttribs();
diff --git a/backend.c b/backend.c
index eed8bff..471a065 100644
--- a/backend.c
+++ b/backend.c
@@ -1027,6 +1027,13 @@ int NextSessionFromString( char ** str, int *moves, long * tc, long *inc, int *i
             if(**str == '!') type = *(*str)++; // Bronstein TC
             if(result = NextIntegerFromString( str, &temp2)) return -1;
             *inc = temp2 * 1000;
+            if(**str == '.') { // read fraction of increment
+                char *start = ++(*str);
+                if(result = NextIntegerFromString( str, &temp2)) return -1;
+                temp2 *= 1000;
+                while(start++ < *str) temp2 /= 10;
+                *inc += temp2;
+            }
         } else *inc = 0;
         *moves = 0; *tc = temp * 1000; *incType = type;
         return 0;
@@ -1069,7 +1076,7 @@ int GetTimeQuota(int movenr, int lastUsed, char *tcString)
 int
 ParseTimeControl(tc, ti, mps)
      char *tc;
-     int ti;
+     float ti;
      int mps;
 {
   long tc1;
@@ -1084,9 +1091,9 @@ ParseTimeControl(tc, ti, mps)
   if(ti > 0) {
 
     if(mps)
-      snprintf(buf, MSG_SIZ, ":%d/%s+%d", mps, mytc, ti);
+      snprintf(buf, MSG_SIZ, ":%d/%s+%g", mps, mytc, ti);
     else 
-      snprintf(buf, MSG_SIZ, ":%s+%d", mytc, ti);
+      snprintf(buf, MSG_SIZ, ":%s+%g", mytc, ti);
   } else {
     if(mps)
       snprintf(buf, MSG_SIZ, ":%d/%s", mps, mytc);
@@ -13539,9 +13546,9 @@ SendTimeControl(cps, mps, tc, inc, sd, st)
 	/* Note old gnuchess bug -- minutes:seconds used to not work.
 	   Fixed in later versions, but still avoid :seconds
 	   when seconds is 0. */
-	snprintf(buf, MSG_SIZ, "level %d %ld %d\n", mps, tc/60000, inc/1000);
+	snprintf(buf, MSG_SIZ, "level %d %ld %g\n", mps, tc/60000, inc/1000);
       } else {
-	snprintf(buf, MSG_SIZ, "level %d %ld:%02d %d\n", mps, tc/60000,
+	snprintf(buf, MSG_SIZ, "level %d %ld:%02d %g\n", mps, tc/60000,
 		 seconds, inc/1000);
       }
     }
diff --git a/backend.h b/backend.h
index 79478aa..7b39f88 100644
--- a/backend.h
+++ b/backend.h
@@ -189,7 +189,7 @@ void AdjustClock P((Boolean which, int dir));
 void DisplayBothClocks P((void));
 void EditPositionMenuEvent P((ChessSquare selection, int x, int y));
 void DropMenuEvent P((ChessSquare selection, int x, int y));
-int ParseTimeControl P((char *tc, int ti, int mps));
+int ParseTimeControl P((char *tc, float ti, int mps));
 void EscapeExpand(char *p, char *q);
 void ProcessICSInitScript P((FILE * f));
 void EditCommentEvent P((void));
diff --git a/common.h b/common.h
index 64e4ece..077c979 100644
--- a/common.h
+++ b/common.h
@@ -385,7 +385,7 @@ typedef struct {
     int premoveHighlightColor;
 #endif
     int movesPerSession;
-    int timeIncrement;
+    float timeIncrement;
     char *initString;
     char *secondInitString;
     char *firstComputerString;
-- 
1.7.0.4