memory: haiku support

pfetch

@@ -494,6 +494,22 @@ get_memory() {
 
             mem_used=$((mem_full - mem_free))
         ;;
+
+        Haiku)
+            # Read the first line of 'sysinfo -mem' splitting on
+            # '(', ' ', and ')'. The needed information is then
+            # sotred in the 5th and 7th elements. Using '_' "consumes"
+            # an element allowing us to proceed to the next one.
+            #
+            # The parsed format is as follows:
+            # 3501142016 bytes free      (used/max  792645632 / 4293787648)
+            IFS='( )' read -r _ _ _ _ mem_used _ mem_full <<-EOF
+                $(sysinfo -mem)
+			EOF
+
+            mem_used=$((mem_used / 1024 / 1024))
+            mem_full=$((mem_full / 1024 / 1024))
+        ;;
     esac
 
     log memory "${mem_used:-?}M / ${mem_full:-?}M" >&6