File: namespace.h

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    /*

    Copyright (C) 2000 Stefan Westerfeld
                       stefan@space.twc.de

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.
  
    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.
   
    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.

    */
#ifndef _MCOPIDL_NAMESPACE_H__
#define _MCOPIDL_NAMESPACE_H__

#include <stdio.h>
#include <string>
#include <list>

/**
 * This class is used while parsing IDL files. It is used to produce fully
 * qualified names (e.g. Arts::Object rather than just Object) of all type
 * identifiers.
 */
class ModuleHelper {
public:
	static void enter(const char *name);
	static void leave();
	static void define(const char *name);
	static char *qualify(const char *name);
};

/**
 * This class is used during code generation. It generates the namespace
 * opening and closing code.
 */
class NamespaceHelper {
protected:
	FILE *out;
	std::list<std::string> currentNamespace;

public:	
	NamespaceHelper(FILE *outputfile);
	~NamespaceHelper();

	/**
	 * This method will cause the NamespaceHelper to enter the namespace the
	 * symbol is in. That means setFromSymbol("Arts::Object") will enter the
	 * namespace Arts. Since this generates code, it should only be called
	 * outside of class definitions.
	 */
	void setFromSymbol(std::string symbol);

	/**
	 * This leaves all open namespaces which is useful if you want to include
	 * a file or such, or if you are at the end of a file.
	 */
	void leaveAll();

	/**
	 * The shortest printable form of a symbol - using "Arts::Object" as
	 * example, this would be "Arts::Object", if you are in no namespace,
	 * ::Arts::Object, if you are in a different namespace, and just Object,
	 * if you are in the Arts namespace.
	 */
	std::string printableForm(std::string symbol);

	/**
	 * Returns only the last component of the symbol (the name) cutting the
	 * namespace components
	 */
	static std::string nameOf(std::string symbol);

	/**
	 * Returns everything but the last component of the symbol, which is
	 * the namespace (e.g. namespaceOf("Arts::Object") returns Arts, and
	 * nameOf("Arts::Object") returns Object).
	 */
	static std::string namespaceOf(std::string symbol);
};

#endif