IDL generation: add constants fields for IDL's

msg/templates/urtps/msg.idl.template

@@ -83,6 +83,15 @@ def add_msg_fields():
                            key=sizeof_field_type, reverse=True)
     for field in sorted_fields:
         add_msg_field(field)
+
+
+def add_msg_constants():
+    sorted_constants = sorted(spec.constants,
+                           key=sizeof_field_type, reverse=True)
+    for constant in sorted_constants:
+        constant_value = '%d' % constant.val
+        print("const " + get_idl_type_name(constant.type) + " " + constant.name + " = " + constant_value + ";")
+
 }@
 #ifndef __@(spec.short_name)__idl__
 #define __@(spec.short_name)__idl__
@@ -94,6 +103,9 @@ def add_msg_fields():
 @(line)
 @[end for]@
 
+@# Constants
+@add_msg_constants()
+
 @[for type in builtin_types]@
 typedef @(type + '_') @(type);
 @[end for]@

msg/tools/generate_microRTPS_bridge.py

@@ -221,11 +221,11 @@ else:
 
 if args.fastrtpsgen is None or args.fastrtpsgen == "":
     # Assume fastrtpsgen is in PATH
-    fastrtpsgen_path = "fastrtpsgen"
+    fastrtpsgen_path = 'fastrtpsgen'
 else:
     # Path to fastrtpsgen is explicitly specified
     fastrtpsgen_path = os.path.join(
-        get_absolute_path(args.fastrtpsgen), "/fastrtpsgen")
+        get_absolute_path(args.fastrtpsgen), 'fastrtpsgen')
 fastrtpsgen_include = args.fastrtpsgen_include
 if fastrtpsgen_include is not None and fastrtpsgen_include != '':
     fastrtpsgen_include = "-I " + \