From 06b5603b8bca0c24dfc1ba6524816e31bd9e425e Mon Sep 17 00:00:00 2001
From: phyto <tth@phytotron.tetalab.org>
Date: Mon, 13 May 2019 17:48:58 +0200
Subject: [PATCH] adding a kbhit() function

---
 essai.c            | 12 ++++++++++--
 viz/curses/ecran.c | 24 ++++++++++++++++++++++++
 viz/curses/ecran.h |  2 ++
 3 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/essai.c b/essai.c
index b17a131..1ca1cbf 100644
--- a/essai.c
+++ b/essai.c
@@ -19,7 +19,7 @@ int	verbosity;
 /* --------------------------------------------------------------- */
 int affiche_valeurs(int sfd, int nbloops)
 {
-int		idx, foo;
+int		idx, foo, key;
 char		ligne[200];
 int		Idatas[4];
 float		Fdatas[4];
@@ -38,8 +38,16 @@ if (NULL==fp) {
 
 for (idx=0; idx<nbloops; idx++) {
 
+	if (kbhit()) {
+		message("!!! KEY !!!");
+		sleep(2);
+		}
+
 	foo = getline_to(sfd, ligne, 100, 0);
-	if (verbosity) message(ligne);
+
+	if (*ligne == 'M') {
+		message(ligne);
+		}
 	
 #if DEBUG_LEVEL
 	if (foo) fprintf(stderr, "get values -> %d\n", foo);
diff --git a/viz/curses/ecran.c b/viz/curses/ecran.c
index 7f72116..71350e1 100644
--- a/viz/curses/ecran.c
+++ b/viz/curses/ecran.c
@@ -11,6 +11,30 @@
 
 extern int	verbosity;
 
+/* ---------------------------------------------------------------- */
+int kbhit(void)
+{
+int		r, ch;
+
+nodelay(stdscr, TRUE);
+noecho();
+
+    // check for input
+ch = getch();
+if( ch == ERR) {     // no input
+	r = FALSE;
+	}
+else	{                // input
+	r = TRUE;
+	ungetch(ch);
+	}
+
+// restore block and echo
+echo();
+nodelay(stdscr, FALSE);
+
+return r;
+}
 /* ---------------------------------------------------------------- */
 int message(char *txt)
 {
diff --git a/viz/curses/ecran.h b/viz/curses/ecran.h
index 9eded7f..5676cc1 100644
--- a/viz/curses/ecran.h
+++ b/viz/curses/ecran.h
@@ -2,6 +2,8 @@
  *	interface ncurses pour dd2 monitoring
  */
 
+int kbhit(void);
+
 int fond_ecran(char *titre);
 int message(char *);