From a630428ed1892dfc762c575417e29d43a027858c Mon Sep 17 00:00:00 2001
From: H.G. Muller <h.g.muller@hccnet.nl>
Date: Fri, 31 May 2013 21:48:45 +0200
Subject: [PATCH] Move input and procesing time, otim to separate routine

Reading the input line and treating some commands is moved to a separate
routine, so it can also be called during ponder search. The commands
needed to be treated in ponder without interrupting it are time and otim
(to get to the following usermove to determine hit-or-miss). The commands
lift and put also must be satisfiable without aborting a ponder search.
(Because Highlight now uses a prepared move list this is possible.)
---
 hachu.c |   33 +++++++++++++++++++++------------
 1 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/hachu.c b/hachu.c
index 2b89d21..2f4a767 100644
--- a/hachu.c
+++ b/hachu.c
@@ -2244,6 +2244,25 @@ printf("# setup done");fflush(stdout);
       else printf("0-1%s\n", tail);
     }
 
+    void GetLine(int root)
+    {
+      int i, c;
+      while(1) {
+        // wait for input, and read it until we have collected a complete line
+        for(i = 0; (inBuf[i] = c = getchar()) != '\n'; i++) if(c == EOF || i>7997) exit(0);
+        inBuf[i+1] = 0;
+
+        // extract the first word
+        sscanf(inBuf, "%s", command);
+        if(!strcmp(command, "otim"))    { continue; } // do not start pondering after receiving time commands, as move will follow immediately
+        if(!strcmp(command, "time"))    { sscanf(inBuf, "time %d", &timeLeft); continue; }
+        if(!strcmp(command, "put"))     { ReadSquare(inBuf+4, &lastPut); continue; }  // ditto
+        if(!strcmp(command, "."))       { inBuf[0] = 0; return; } // ignore for now
+        if(!strcmp(command, "lift"))    { inBuf[0] = 0; Highlight(inBuf+5); return; } // treat here
+        return;
+      }
+    }
+
     main()
     {
       int engineSide=NONE;                     // side played by engine
@@ -2307,22 +2326,14 @@ pboard(board);
           }
         }
 
-      noPonder:
-        // wait for input, and read it until we have collected a complete line
-        for(i = 0; (inBuf[i] = getchar()) != '\n'; i++);
-        inBuf[i+1] = 0;
-
-        // extract the first word
-        sscanf(inBuf, "%s", command);
-printf("in: %s\n", command);
+        fflush(stdout);         // make sure everything is printed before we do something that might take time
+        if(!*inBuf) GetLine(1); // takes care of time and otim commands
 
         // recognize the command,and execute it
         if(!strcmp(command, "quit"))    { break; } // breaks out of infinite loop
         if(!strcmp(command, "force"))   { engineSide = NONE;    continue; }
         if(!strcmp(command, "analyze")) { engineSide = ANALYZE; continue; }
         if(!strcmp(command, "exit"))    { engineSide = NONE;    continue; }
-        if(!strcmp(command, "otim"))    { goto noPonder; } // do not start pondering after receiving time commands, as move will follow immediately
-        if(!strcmp(command, "time"))    { sscanf(inBuf, "time %d", &timeLeft); goto noPonder; }
         if(!strcmp(command, "level"))   {
           int min, sec=0;
           sscanf(inBuf, "level %d %d %d", &mps, &min, &inc) == 3 ||  // if this does not work, it must be min:sec format
@@ -2356,8 +2367,6 @@ printf("in: %s\n", command);
         if(!strcmp(command, "nopost"))  { postThinking = OFF;continue; }
         if(!strcmp(command, "random"))  { randomize = ON;    continue; }
         if(!strcmp(command, "hint"))    { if(ponderMove != INVALID) printf("Hint: %s\n", MoveToText(ponderMove, 0)); continue; }
-        if(!strcmp(command, "lift"))    { Highlight(inBuf+5); continue; }
-        if(!strcmp(command, "put"))     { ReadSquare(inBuf+4, &lastPut); continue; }
         if(!strcmp(command, "book"))    {  continue; }
 	// non-standard commands
         if(!strcmp(command, "p"))       { pboard(board); continue; }
-- 
1.7.0.4