Ported strstr() from c to go for use in librtmp.go

rtmp/rtmp.go

@@ -593,6 +593,27 @@ func C_RTMP_SetupURL(r *C.RTMP, u string) int32 {
 	return 1
 }
 
+// int RTMP_ParseURL(const char *url, int *protocol, AVal *host, unsigned int *port,
+//	AVal *playpath, AVal *app);
+// parseurl.c +33
+func C_RTMP_ParseURL(url *byte, protocol *int32, host *C.AVal, port *uint32,
+	playpath *C.AVal, app *C.AVal) {
+
+	var p, end, col, ques, slash *byte
+
+	// RTMP_Log(RTMP_LOGDEBUG, "Parsing...");
+
+	*protocol = RTMP_PROTOCOL_RTMP
+	*port = 0
+	playpath.av_len = 0
+	playpath.av_val = nil
+	app.av_len = 0
+	app.av_val = nil
+
+	p = str
+
+}
+
 // void SocksSetup(RTMP *r, C.AVal* sockshost);
 // rtmp.c +410
 func C_SocksSetup(r *C.RTMP, sockshost *C.AVal) {
@@ -2353,6 +2374,42 @@ func strchr(str *byte, val byte) *byte {
 	return nil
 }
 
+// Porting: http://www.ai.mit.edu/projects/im/cam8/cam8/working/CAMlib/tcl/compat/strstr.c
+func strstr(str *byte, substring *byte) *byte {
+	var a, b *byte
+	/* First scan quickly through the two strings looking for a
+	 * single-character match.  When it's found, then compare the
+	 * rest of the substring.
+	 */
+
+	b = substring
+	if *b == 0 {
+		return str
+	}
+
+	for *str != 0 {
+		str = (*byte)(incBytePtr(unsafe.Pointer(str), 1))
+		if *str != *b {
+			continue
+		}
+		a = str
+		for {
+			if *b == 0 {
+				return str
+			}
+			tmp1 := a
+			a = (*byte)(incBytePtr(unsafe.Pointer(a), 1))
+			tmp2 := b
+			b = (*byte)(incBytePtr(unsafe.Pointer(b), 1))
+			if *tmp1 != *tmp2 {
+				break
+			}
+		}
+		b = substring
+	}
+	return nil
+}
+
 // Creates mem of the size noOfBytes. returns as unsafe pointer
 func allocate(nOfBytes uintptr) unsafe.Pointer {
 	mem := make([]byte, int(nOfBytes))