MT#55283 introduce STR_INIT_GS

Construct a `str` from a `GString`

Change-Id: I17b1e61cd99380a02bf194eea3538be6e745686a

daemon/rtcp.c

@@ -1597,7 +1597,7 @@ void rtcp_send_report(struct call_media *media, struct ssrc_ctx *ssrc_out) {
 
 	// handle crypto
 
-	str rtcp_packet = STR_INIT_LEN(sr->str, sr->len);
+	str rtcp_packet = STR_INIT_GS(sr);
 
 	const struct streamhandler *crypt_handler = determine_handler(&transport_protocols[PROTO_RTP_AVP],
 			media, true);

daemon/t38.c

@@ -713,7 +713,7 @@ int t38_gateway_input_udptl(struct t38_gateway *tg, const str *buf) {
 							"packet with seq %i from FEC",
 							seq_fec);
 
-					str rec_str = STR_INIT_LEN(rec_s->str, rec_s->len);
+					str rec_str = STR_INIT_GS(rec_s);
 					__fec_save(tg, &rec_str, seq_fec);
 					up = __make_udptl_packet(&rec_str, seq_fec);
 					packet_sequencer_insert(&tg->sequencer, &up->p);

lib/str.h

@@ -38,6 +38,7 @@ TYPED_GQUEUE(str, str)
 #define STR_EMPTY ((str) { "", 0 })
 #define STR_CONST_INIT(s) ((str) { s, sizeof(s)-1 })
 #define STR_INIT(s) ((str) { (char *) (s), (s) ? strlen(s) : 0 })
+#define STR_INIT_GS(s) ((str) { (s)->str, (s)->len })
 #define STR_INIT_LEN(s, len) ((str) { (char *) (s), len })
 #define STR_INIT_DUP(s) ((str) { g_strdup(s), strlen(s) })
 #define STR_CONST_INIT_BUF(buf) ((str) { (char *) &buf, sizeof(buf) })