clean snake

1 files changed, 20 insertions, 35 deletions

diff --git a/userspace/snake2.c b/userspace/snake2.c
index 78be50d..3b179ac 100644
--- a/userspace/snake2.c
+++ b/userspace/snake2.c
@@ -1,55 +1,40 @@
 #include <stdio.h>
-
-int data4[100];
-
-// syscall will be move to newlib?
-#define SYSCALL_CLONE 83
-
-int _clone(void)
-{
-    return syscall(SYSCALL_CLONE,0,0,0);
-}
+#include "snake2.h"
 
 static char lastc='d';
 
 int main()
 {
-    printf("setvbuf returned %i\n",setvbuf(stdin,NULL,_IONBF,0));
-    printf("setvbuf returned %i\n",setvbuf(stdout,NULL,_IONBF,0));
 
-    printf("\033c");
-    printf("\033HFOOL-SNAKE");
-    //printf("\033d\033d\033dFOOL-SNAKE");
-    printf("\033d");
-    char snake[]="FOOLSNAKESFOOL";
+    // turn off buffering for stdin and stdout
+    setvbuf(stdin,NULL,_IONBF,0);
+    setvbuf(stdout,NULL,_IONBF,0);
 
-    int thr=_clone();
-    if(thr==0)
-    {
-	uint64_t x=0;
+    printf("\033c\033HFOOL-SNAKE\033d\n"); // title
+    char snake[]="FOOLSNAKES"; // snakes letters
+
+    int thread=_clone(); // we want to threads
+    uint64_t x=0; // counter
 
+    if(thread==0) // thread 1
+    {
 	while(1)
 	{
-	    for(int i=0;i<10000000;i++);
+	    for(int i=0;i<10000000;i++); // naive wait
 
 	    x++;
-	    if(lastc=='d')printf("\033f");
-	    if(lastc=='a')printf("\033b");
-	    if(lastc=='w')printf("\033u");
-	    if(lastc=='s')printf("\033d");
+	    if(lastc=='d')printf("\033f"); //rigth
+	    if(lastc=='a')printf("\033b"); //left
+	    if(lastc=='w')printf("\033u"); //up 
+	    if(lastc=='s')printf("\033d"); //down
 
-	    printf("\033[0;%im\033b%c",31+(uint8_t)(x%6),snake[x%10]);
+	    // put letter
+	    printf("\033[0;%im\033b%c",31+(uint8_t)(x%6),snake[x%10]); 
 
 	}
 	
     }
-    else
-    {
-	while(1)
-	{
-	    char c=fgetc(stdin);
-	    lastc=c;
-	}
-    }
+    else while(1) lastc=fgetc(stdin); // thread 2
 
 }
+