Merge remote branch 'origin/topic/gregor/bif-tuning'

* origin/topic/gregor/bif-tuning:
  Refactor: BifTypePtr --> BifType
  Bif const: make sure const is indeed a constant.
  Support any type in bif const declaration.
  Tweak for bifcl
  Fix to bifcl wrt namespaces.
  Enable declaration of set, vector, and table types in bifs.
  Moving type declarations into its own bif file
  Support namespaces / modules in bif. Checkpoint.
  Support namespaces / modules in bif. Checkpoint.
  Remove leftovers from removing "declare enum" from bifcl
  Use namespaces for NetVar type pointers.
  Remove unused and unnecessary "declare enum" from bifcl
  Bif: add record type declaration.
  Minor tweaks for bif language.
  enum type: don't allow mixing of explicit value and auto-increment.
  Add support for enum with explicit enumerator values.

Closes #403.

src/module_util.cc

@@ -0,0 +1,62 @@
+//
+// See the file "COPYING" in the main distribution directory for copyright.
+
+#include <string>
+#include <string.h>
+#include "module_util.h"
+
+static int streq(const char* s1, const char* s2)
+	{
+	return ! strcmp(s1, s2);
+	}
+
+// Returns it without trailing "::".
+string extract_module_name(const char* name)
+	{
+	string module_name = name;
+	string::size_type pos = module_name.rfind("::");
+
+	if ( pos == string::npos )
+		return string(GLOBAL_MODULE_NAME);
+
+	module_name.erase(pos);
+
+	return module_name;
+	}
+
+string extract_var_name(const char *name)
+	{
+	string var_name = name;
+	string::size_type pos = var_name.rfind("::");
+
+	if ( pos == string::npos )
+		return var_name;
+
+	if ( pos + 2 > var_name.size() )
+		return string("");
+
+	return var_name.substr(pos+2);
+	}
+
+string normalized_module_name(const char* module_name)
+	{
+	int mod_len;
+	if ( (mod_len = strlen(module_name)) >= 2 &&
+	     streq(module_name + mod_len - 2, "::") )
+		mod_len -= 2;
+
+	return string(module_name, mod_len);
+	}
+
+string make_full_var_name(const char* module_name, const char* var_name)
+	{
+	if ( ! module_name || streq(module_name, GLOBAL_MODULE_NAME) ||
+	     strstr(var_name, "::") )
+		return string(var_name);
+
+	string full_name = normalized_module_name(module_name);
+	full_name += "::";
+	full_name += var_name;
+
+	return full_name;
+	}