ig-c99: refactor and update enums

lm-c99/ig-c99.ysl2

@@ -91,9 +91,7 @@ tstylesheet {
         // --------
         ``apply "deftype", 0
 
-        // Enums
-        // -----
-        ``apply "enum", 0
+        ``call "enums"
 
         // Structs
         // -------
@@ -181,10 +179,25 @@ tstylesheet {
         result "yml:ucase(concat($pkg_name, '_', $name))";
     }
 
+    function "enums" {
+        ||
+        // Enums
+        // -----
+
+        ``apply "enum"
+        ||
+    }
+
     template "enum" {
-        const "idl_name", "@name";
-        const "pkg_name", "../../@name";
-        const "enum_name", "func:idltype_to_ctype_enum($pkg_name, $idl_name)";
+        call "enum"
+            with "idl_enum_name", "@name",
+            with "idl_pkg_name", "../../@name";
+    }
+
+    function "enum" {
+        param "idl_enum_name";
+        param "idl_pkg_name";
+        const "enum_name", "func:idltype_to_ctype_enum($idl_pkg_name, $idl_enum_name)";
         ||
         typedef enum _«$enum_name» {
             ``apply "item" with "enum_name", "$enum_name"
@@ -195,19 +208,25 @@ tstylesheet {
 
     template "item" {
         param "enum_name";
-        const "item_name_idl", "@name";
-        const "item_name", "yml:ucase(concat($enum_name, '_', $item_name_idl))";
+        const "idl_item_name", "@name";
+        const "c99_item_name", "yml:ucase(concat($enum_name, '_', $idl_item_name))";
+        const "idl_value", "text()";
+        const "c99_value", "func:enum_item_value($idl_value)";
 
         apply "@doc", 0, mode="multiline";
+        | «$c99_item_name»«$c99_value»«func:autocomma()»`apply "@doc" , 0, mode="oneline"`
+    }
+
+    def "func:enum_item_value" {
+        param "idl_value";
         choose {
-            when "@output='hex'"
-                | «$item_name»`if "text()" { " = 0x" value "yml:dec2hex(., 2)" }`«func:autocomma()»`apply "@doc" , 0, mode="oneline"`
+            when "string-length($idl_value) > 0"
+                result >  = «$idl_value»
             otherwise
-                | «$item_name»`if "text()" { " = " value "." }``apply "@doc" , 0, mode="oneline"`
+                result >
         }
-    }
-
 
+    }
 
     // STRUCT
     // ------