Fixes for C enums used in an API and the definition of the enum has not been parsed.

For D, this fixes a segfault in SWIG.

Java, C#, D, Go now produce code that compiles, although the definition of the
enum is needed in order to use the enum properly from the target language.

CHANGES.current

@@ -5,5 +5,8 @@ See the RELEASENOTES file for a summary of changes in each release.
 Version 3.0.1 (in progress)
 ===========================
 
+2014-03-28: wsfulton
+            [Java C# D Go] Fix for usage of snprintf in Lua runtime which Visual Studio does not have.
+
 2014-03-23: v-for-vandal
             [Lua] Fix for usage of snprintf in Lua runtime which Visual Studio does not have.

Examples/test-suite/common.mk

@@ -580,6 +580,7 @@ C_TEST_CASES += \
 	enums \
 	enum_forward \
 	enum_macro \
+	enum_missing \
 	extern_declaration \
 	funcptr \
 	function_typedef \

Examples/test-suite/enum_missing.i

@@ -0,0 +1,39 @@
+%module enum_missing
+
+// Test when SWIG does not parse the enum definition
+%{
+enum AVPixelFormat {
+    AV_PIX_FMT_NONE = -1,
+    AV_PIX_FMT_YUV420P
+};
+enum AVPixelFormat2 {
+    AV_PIX_FMT_NONE2 = -1,
+    AV_PIX_FMT_YUV420P2
+};
+
+%}
+
+%inline %{
+typedef struct AVCodecContext {
+  enum AVPixelFormat pix_fmt;
+  enum AVPixelFormat2 pix_fmt2;
+} AVCodecContext;
+
+enum AVPixelFormat global_fmt;
+enum AVPixelFormat2 global_fmt2;
+
+enum AVPixelFormat use_pixel_format(enum AVPixelFormat px) {
+  return px;
+}
+enum AVPixelFormat * use_pixel_format_ptr(enum AVPixelFormat *px) {
+  return px;
+}
+
+const enum AVPixelFormat2 use_pixel_format2(const enum AVPixelFormat2 px) {
+  return px;
+}
+const enum AVPixelFormat2 * use_pixel_format_ptr2(const enum AVPixelFormat2 *px) {
+  return px;
+}
+%}
+

Source/Modules/csharp.cxx

@@ -3165,25 +3165,37 @@ public:
    * ----------------------------------------------------------------------------- */
 
   void substituteClassnameSpecialVariable(SwigType *classnametype, String *tm, const char *classnamespecialvariable) {
+    String *replacementname;
     if (SwigType_isenum(classnametype)) {
       String *enumname = getEnumName(classnametype);
-      if (enumname)
+      if (enumname) {
-	Replaceall(tm, classnamespecialvariable, enumname);
+	replacementname = Copy(enumname);
-      else
-	Replaceall(tm, classnamespecialvariable, NewStringf("int"));
       } else {
-      String *classname = getProxyName(classnametype);
+	bool anonymous_enum = (Cmp(classnametype, "enum ") == 0);
+	if (anonymous_enum) {
+	  replacementname = NewString("int");
+	} else {
+	  // An unknown enum - one that has not been parsed (neither a C enum forward reference nor a definition)
+	  replacementname = SwigType_base(classnametype);
+	  Replace(replacementname, "enum ", "", DOH_REPLACE_ANY);
+	  Setattr(swig_types_hash, replacementname, classnametype);
+	}
+      }
+    } else {
+      String *classname = getProxyName(classnametype); // getProxyName() works for pointers to classes too
       if (classname) {
-	Replaceall(tm, classnamespecialvariable, classname);	// getProxyName() works for pointers to classes too
+	replacementname = Copy(classname);
-      } else {			// use $descriptor if SWIG does not know anything about this type. Note that any typedefs are resolved.
+      } else {
-	String *descriptor = NewStringf("SWIGTYPE%s", SwigType_manglestr(classnametype));
+	// use $descriptor if SWIG does not know anything about this type. Note that any typedefs are resolved.
-	Replaceall(tm, classnamespecialvariable, descriptor);
+	replacementname = NewStringf("SWIGTYPE%s", SwigType_manglestr(classnametype));
 
 	// Add to hash table so that the type wrapper classes can be created later
-	Setattr(swig_types_hash, descriptor, classnametype);
+	Setattr(swig_types_hash, replacementname, classnametype);
-	Delete(descriptor);
       }
     }
+    Replaceall(tm, classnamespecialvariable, replacementname);
+
+    Delete(replacementname);
   }
 
   /* -----------------------------------------------------------------------------
@@ -3273,6 +3285,9 @@ public:
     Replaceall(swigtype, "$imclassname", imclass_name);
     Replaceall(swigtype, "$dllimport", dllimport);
 
+    // For unknown enums
+    Replaceall(swigtype, "$enumvalues", "");
+
     Printv(f_swigtype, swigtype, NIL);
 
     addCloseNamespace(0, f_swigtype);

Source/Modules/d.cxx

@@ -568,8 +568,7 @@ public:
 	writeTypeWrapperClass(swig_type.key, swig_type.item);
       }
 
-      // Add the proxy functions (and classes, if they are not written to a
+      // Add the proxy functions (and classes, if they are not written to a separate file).
-      // seperate file).
       replaceModuleVariables(proxy_dmodule_code);
       Printv(proxy_d_file, proxy_dmodule_code, NIL);
 
@@ -1399,7 +1398,7 @@ public:
       // generates a getter function (which is the same as a read only property
       // in D) which retrieves the value via by calling the C wrapper.
       // Note that this is only called for global constants, static member
-      // constants are already handeled in staticmemberfunctionHandler().
+      // constants are already handled in staticmemberfunctionHandler().
 
       Swig_save("constantWrapper", n, "value", NIL);
       Swig_save("constantWrapper", n, "tmap:ctype:out", "tmap:imtype:out", "tmap:dtype:out", "tmap:out:null", "tmap:imtype:outattributes", "tmap:dtype:outattributes", NIL);
@@ -3602,7 +3601,7 @@ private:
    * package if one is set.
    *
    * This is only used for dependencies created in generated code, user-
-   * (i.e. typemap-) specified import statements are handeled seperately.
+   * (i.e. typemap-) specified import statements are handled separately.
    * --------------------------------------------------------------------------- */
   void requireDType(const String *nspace, const String *symname) {
     String *dmodule = createModuleName(nspace, symname);
@@ -4054,10 +4053,10 @@ private:
     // TODO: Fix const-correctness of methods called in here and make type const.
 
     // We make use of the fact that this function is called at least once for
-    // every type encountered which is written to a seperate file, which allows
+    // every type encountered which is written to a separate file, which allows
     // us to handle imports here.
     // When working in split proxy module mode, each generated proxy class/enum
-    // is written to a seperate module. This requires us to add a corresponding
+    // is written to a separate module. This requires us to add a corresponding
     // import when a type is used in another generated module. If we are not
     // working in split proxy module mode, this is not relevant and the
     // generated module name is discarded.
@@ -4066,6 +4065,7 @@ private:
     if (SwigType_isenum(type)) {
       // RESEARCH: Make sure that we really cannot get here for anonymous enums.
       Node *n = enumLookup(type);
+      if (n) {
 	String *enum_name = Getattr(n, "sym:name");
 
 	Node *p = parentNode(n);
@@ -4074,7 +4074,7 @@ private:
 	  String *parent_name = Getattr(p, "sym:name");
 	  String *nspace = Getattr(p, "sym:nspace");
 
-	// An enum nested in a class is not written to a seperate module (this
+	  // An enum nested in a class is not written to a separate module (this
 	  // would not even be possible in D), so just import the parent.
 	  requireDType(nspace, parent_name);
 
@@ -4085,7 +4085,7 @@ private:
 	    type_name = NewStringf("%s%s.%s.%s", package, module, parent_name, enum_name);
 	  }
 	} else {
-	// A non-nested enum is written to a seperate module, import it.
+	  // A non-nested enum is written to a separate module, import it.
 	  String *nspace = Getattr(n, "sym:nspace");
 	  requireDType(nspace, enum_name);
 
@@ -4096,6 +4096,9 @@ private:
 	    type_name = NewStringf("%s%s.%s", package, module, enum_name);
 	  }
 	}
+      } else {
+	type_name = NewStringf("int");
+      }
     } else {
       Node *n = classLookup(type);
       if (n) {

Source/Modules/go.cxx

@@ -79,6 +79,9 @@ class GO:public Language {
   bool making_variable_wrappers;
   // True when working with a static member function.
   bool is_static_member_function;
+  // A hash table of enum types that we have seen but which may not have
+  // been defined.  The index is a SwigType.
+  Hash *undefined_enum_types;
   // A hash table of types that we have seen but which may not have
   // been defined.  The index is a SwigType.
   Hash *undefined_types;
@@ -124,6 +127,7 @@ public:
      class_methods(NULL),
      making_variable_wrappers(false),
      is_static_member_function(false),
+     undefined_enum_types(NULL),
      undefined_types(NULL),
      defined_types(NULL),
      go_imports(NULL) {
@@ -451,6 +455,7 @@ private:
 
     // Set up the hash table for types not defined by SWIG.
 
+    undefined_enum_types = NewHash();
     undefined_types = NewHash();
     defined_types = NewHash();
     go_imports = NewHash();
@@ -463,6 +468,13 @@ private:
 
     // Write out definitions for the types not defined by SWIG.
 
+    if (Len(undefined_enum_types) > 0)
+      Printv(f_go_wrappers, "\n", NULL);
+    for (Iterator p = First(undefined_enum_types); p.key; p = Next(p)) {
+      String *name = p.item;
+      Printv(f_go_wrappers, "type ", name, " int\n", NULL);
+    }
+
     Printv(f_go_wrappers, "\n", NULL);
     for (Iterator p = First(undefined_types); p.key; p = Next(p)) {
       String *ty = goType(NULL, p.key);
@@ -481,6 +493,7 @@ private:
       }
       Delete(ty);
     }
+    Delete(undefined_enum_types);
     Delete(undefined_types);
     Delete(defined_types);
 
@@ -4494,11 +4507,18 @@ private:
 
     SwigType *t = SwigType_typedef_resolve_all(type);
 
+    if (SwigType_isenum(t)) {
       Node *e = Language::enumLookup(t);
       if (e) {
 	ret = goEnumName(e);
       } else if (Strcmp(t, "enum ") == 0) {
 	ret = NewString("int");
+      } else {
+	// An unknown enum - one that has not been parsed (neither a C enum forward reference nor a definition)
+	ret = SwigType_base(t);
+	Replace(ret, "enum ", "", DOH_REPLACE_ANY);
+	Setattr(undefined_enum_types, t, ret);
+      }
     } else if (SwigType_isfunctionpointer(type) || SwigType_isfunction(type)) {
       ret = NewString("_swig_fnptr");
     } else if (SwigType_ismemberpointer(type)) {
@@ -4809,8 +4829,13 @@ private:
 	}
       }
 
-      if (Language::enumLookup(t) != NULL || Strcmp(t, "enum ") == 0) {
+      if (Language::enumLookup(t) != NULL) {
 	is_int = true;
+      } else {
+	SwigType *tstripped = SwigType_strip_qualifiers(t);
+	if (SwigType_isenum(tstripped))
+	  is_int = true;
+	Delete(tstripped);
       }
 
       Delete(t);

Source/Modules/java.cxx

@@ -3083,10 +3083,19 @@ public:
 
     if (SwigType_isenum(classnametype)) {
       String *enumname = getEnumName(classnametype, jnidescriptor);
-      if (enumname)
+      if (enumname) {
 	replacementname = Copy(enumname);
-      else
+      } else {
+        bool anonymous_enum = (Cmp(classnametype, "enum ") == 0);
+	if (anonymous_enum) {
 	  replacementname = NewString("int");
+	} else {
+	  // An unknown enum - one that has not been parsed (neither a C enum forward reference nor a definition)
+	  replacementname = SwigType_base(classnametype);
+	  Replace(replacementname, "enum ", "", DOH_REPLACE_ANY);
+	  Setattr(swig_types_hash, replacementname, classnametype);
+	}
+      }
     } else {
       String *classname = getProxyName(classnametype, jnidescriptor); // getProxyName() works for pointers to classes too
       if (classname) {
@@ -3186,6 +3195,11 @@ public:
     Replaceall(swigtype, "$javaclassname", classname);
     Replaceall(swigtype, "$module", module_class_name);
     Replaceall(swigtype, "$imclassname", imclass_name);
+
+    // For unknown enums
+    Replaceall(swigtype, "$static ", "");
+    Replaceall(swigtype, "$enumvalues", "");
+
     Printv(f_swigtype, swigtype, NIL);
 
     Delete(f_swigtype);