stanza: add xmpp_stanza_get_context()

This function is backported from UnrealEngine project.

ChangeLog

@@ -6,6 +6,7 @@
 		- xmpp_conn_is_connecting()
 		- xmpp_conn_is_connected()
 		- xmpp_conn_is_disconnected()
+		- xmpp_stanza_get_context()
 
 0.9.3
 	- PLAIN mechanism is used only when no other mechanisms are supported

src/stanza.c

@@ -188,6 +188,19 @@ int xmpp_stanza_release(xmpp_stanza_t * const stanza)
     return released;
 }
 
+/** Get the strophe context that the stanza is associated with.
+ *
+ *  @param stanza a Strophe stanza object
+ *
+ *  @return a Strophe context
+ *
+ *  @ingroup Stanza
+ */
+xmpp_ctx_t *xmpp_stanza_get_context(const xmpp_stanza_t * const stanza)
+{
+    return stanza->ctx;
+}
+
 /** Determine if a stanza is a text node.
  *  
  *  @param stanza a Strophe stanza object

strophe.h

@@ -326,6 +326,8 @@ xmpp_stanza_t *xmpp_stanza_copy(const xmpp_stanza_t * const stanza);
 /* free a stanza object and it's contents */
 int xmpp_stanza_release(xmpp_stanza_t * const stanza);
 
+xmpp_ctx_t *xmpp_stanza_get_context(const xmpp_stanza_t * const stanza);
+
 int xmpp_stanza_is_text(xmpp_stanza_t * const stanza);
 int xmpp_stanza_is_tag(xmpp_stanza_t * const stanza);