From 3f02c0b84e29979405064a927952a21bd2427045 Mon Sep 17 00:00:00 2001
From: H.G.Muller <hgm@hgm-xboard.(none)>
Date: Wed, 27 Apr 2016 21:41:45 +0200
Subject: [PATCH] Make resistant to empty lines

An empty line (emitted by XBoard due to a bug) made HaChu repeat
the previous command. Now the GetLine routine keeps reading until
it gets a non-empty line.
---
 hachu.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/hachu.c b/hachu.c
index 7c672d4..bb26721 100644
--- a/hachu.c
+++ b/hachu.c
@@ -2792,8 +2792,10 @@ printf("# setup done");fflush(stdout);
       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;
+        do {
+          for(i = 0; (inBuf[i] = c = getchar()) != '\n'; i++) if(c == EOF || i>7997) exit(0);
+          inBuf[i+1] = 0;
+        } while(!i); // ignore empty lines
 
         // extract the first word
         sscanf(inBuf, "%s", command);
-- 
1.7.0.4