Add subscription manager for MQTT (aws#1094)

Author: aggarw13

demos/lexicon.txt

@@ -31,6 +31,7 @@ developerguide
 doesn
 dup
 endif
+filterindex
 hashmap
 hasn
 html
@@ -48,6 +49,7 @@ methodlen
 milli
 mosquitto
 mqtt
+nameindex
 noninfringement
 openssl
 org
@@ -58,6 +60,7 @@ packetidtoresend
 param
 pathlen
 pbuffer
+pcontext
 pdeserializedinfo
 pem
 pfixedbuffer
@@ -66,8 +69,10 @@ pindex
 pingreq
 pingresp
 plaintext
+pmatch
 pmethod
 pmqttcontext
+pnameindex
 pnetworkcontext
 posix
 ppacketinfo
@@ -76,6 +81,8 @@ ppubinfo
 ppublishinfo
 processloop
 psessionpresent
+ptopicfilter
+ptopicname
 ptransportinterface
 puback
 pubcomp
@@ -91,9 +98,12 @@ structs
 suback
 sublicense
 subscribepublishloop
+sys
 tcp
 tcpsocket
 tls
+topicfilterlength
+topicnamelength
 transportinterface
 transporttimeout
 uint

demos/mqtt/subscription-manager/CMakeLists.txt

@@ -0,0 +1,17 @@
+set( LIBRARY_NAME "mqtt_subscription_manager" )
+# Library target.
+add_library( ${LIBRARY_NAME}
+            "${LIBRARY_NAME}.c" )
+
+target_link_libraries(
+    ${LIBRARY_NAME}
+    PRIVATE
+        mqtt
+)
+
+target_include_directories(
+    ${LIBRARY_NAME}
+    PUBLIC
+        ${LOGGING_INCLUDE_DIRS}
+)
+