--- sbbs/src/sbbs3/ringbuf.c	2018/04/24 16:41:23	1.1
+++ sbbs/src/sbbs3/ringbuf.c	2018/04/24 16:43:11	1.1.1.2
@@ -2,7 +2,7 @@
 
 /* Synchronet ring buffer routines */
 
-/* $Id: ringbuf.c,v 1.1 2018/04/24 16:41:23 root Exp $ */
+/* $Id: ringbuf.c,v 1.1.1.2 2018/04/24 16:43:11 root Exp $ */
 
 /****************************************************************************
  * @format.tab-size 4		(Plain Text/Source Code File Header)			*
@@ -147,15 +147,6 @@ DWORD RINGBUFCALL RingBufFull( RingBuf*
 
 	retval = RINGBUF_FILL_LEVEL(rb);
 
-#ifdef RINGBUF_EVENT
-	if(rb->empty_event!=NULL) {
-		if(retval==0)
-			SetEvent(rb->empty_event);
-		else
-			ResetEvent(rb->empty_event);
-	}
-#endif
-
 #ifdef RINGBUF_MUTEX
 	pthread_mutex_unlock(&rb->mutex);
 #endif
@@ -176,6 +167,9 @@ DWORD RINGBUFCALL RingBufWrite( RingBuf*
 {
 	DWORD max, first, remain;
 
+	if(cnt==0)
+		return(cnt);
+
 	if(rb->pStart==NULL)
 		return(0);
 
@@ -184,7 +178,7 @@ DWORD RINGBUFCALL RingBufWrite( RingBuf*
 #endif
 
     /* allowed to write at pEnd */
-	max = (((DWORD) rb->pEnd) - ((DWORD) rb->pHead)) + 1;
+	max = rb->pEnd - rb->pHead + 1;
 
 	/*
 	 * we assume the caller has checked that there is enough room. For this reason
@@ -245,7 +239,7 @@ DWORD RINGBUFCALL RingBufRead( RingBuf*
         cnt = len;
 
 	/* allowed to read at pEnd */
-	max = (((DWORD) rb->pEnd) - ((DWORD) rb->pTail)) + 1;
+	max = rb->pEnd - rb->pTail + 1;
 
 	if( max >= cnt ) {
 		first = cnt;
@@ -307,7 +301,7 @@ DWORD RINGBUFCALL RingBufPeek( RingBuf*
         cnt = len;
 
     /* allowed to read at pEnd */
-	max = (((DWORD) rb->pEnd) - ((DWORD) rb->pTail)) + 1;
+	max = rb->pEnd - rb->pTail + 1;
 
 	if( max >= cnt ) {
 		first = cnt;