# HG changeset patch
# User John Tsiombikas <nuclear@member.fsf.org>
# Date 1379898429 -10800
# Node ID da4c014bb055e768f4491138c78acbed878af14f
# Parent  cb82d9a86b22e9ef5492eb1cc2fd3aa4fb47c09c
implemented kb_isdown(KB_ANY) correctly

diff -r cb82d9a86b22 -r da4c014bb055 keyb.c
--- a/keyb.c	Mon Sep 23 03:45:39 2013 +0300
+++ b/keyb.c	Mon Sep 23 04:07:09 2013 +0300
@@ -42,6 +42,7 @@
 static int buffer_size, buf_ridx, buf_widx;
 static int last_key;
 
+static unsigned int num_pressed;
 static unsigned char keystate[256];
 
 #define ADVANCE(x)	((x) = ((x) + 1) % buffer_size)
@@ -62,6 +63,7 @@
 	last_key = -1;
 
 	memset(keystate, 0, sizeof keystate);
+	num_pressed = 0;
 
 	/* set our interrupt handler */
 	_disable();
@@ -88,6 +90,9 @@
 
 int kb_isdown(int key)
 {
+	if(key == KB_ANY) {
+		return num_pressed;
+	}
 	return (int)keystate[key];
 }
 
@@ -155,8 +160,14 @@
 	if(code >= 128) {
 		press = 0;
 		code -= 128;
+
+		if(num_pressed > 0) {
+			num_pressed--;
+		}
 	} else {
 		press = 1;
+
+		num_pressed++;
 	}
 
 	key = scantbl[code];
diff -r cb82d9a86b22 -r da4c014bb055 test.c
--- a/test.c	Mon Sep 23 03:45:39 2013 +0300
+++ b/test.c	Mon Sep 23 04:07:09 2013 +0300
@@ -12,6 +12,15 @@
 	 */
 	kb_init(16);
 
+	printf("Press any key to continue ...\n");
+
+	/* example of active polling... The same can be done better by using
+	 * kb_wait()
+	 */
+	while(!kb_isdown(KB_ANY));
+	kb_getkey();	/* discard the key we just detected */
+
+	printf("Key tester, quit by pressing esc\n");
 	for(;;) {
 		kb_wait();			/* wait for any keypress */
 		key = kb_getkey();	/* get the pressed key */