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livetrax/libs/glibmm2/glib/glibmm/utility.h
Paul Davis 449aab3c46 rollback to 3428, before the mysterious removal of libs/* at 3431/3432
git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf
2008-06-02 21:41:35 +00:00

118 lines
3.5 KiB
C++

// -*- c++ -*-
#ifndef _GLIBMM_UTILITY_H
#define _GLIBMM_UTILITY_H
/* $Id: utility.h 386 2007-03-23 17:31:16Z murrayc $ */
/* Copyright 2002 The gtkmm Development Team
*
* 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; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <glib/gmacros.h>
#include <glib/gmem.h>
#include <glibmm/ustring.h>
#ifndef DOXYGEN_SHOULD_SKIP_THIS
/* Occasionally, a struct variable has to be initialized after its definition,
* i.e. when using structs as class member data. For convenience, the macro
* GLIBMM_INITIALIZE_STRUCT(Var, Type) is provided. It even avoids creating
* a temporary if the compiler is GCC.
*/
#if ((__GNUC__ >= 3) || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)) && !defined(__STRICT_ANSI__)
#define GLIBMM_INITIALIZE_STRUCT(Var, Type) __builtin_memset(&(Var), 0, sizeof(Type))
#else
#define GLIBMM_INITIALIZE_STRUCT(Var, Type) \
G_STMT_START{ \
Type const temp_initializer__ = { 0, }; \
(Var) = temp_initializer__; \
}G_STMT_END
#endif /* ((__GNUC__ >= 3) || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)) && !defined(__STRICT_ANSI__) */
namespace Glib
{
// These are used by gtkmmproc-generated type conversions:
// Helper to deal with memory allocated
// by GLib functions in an exception-safe manner.
template <typename T>
class ScopedPtr
{
private:
T* ptr_;
ScopedPtr(const ScopedPtr<T>&);
ScopedPtr<T>& operator=(const ScopedPtr<T>&);
public:
ScopedPtr() : ptr_ (0) {}
explicit ScopedPtr(T* ptr) : ptr_ (ptr) {}
~ScopedPtr() { g_free(ptr_); }
T* get() const { return ptr_; }
T** addr() { return &ptr_; }
};
// Removes the const nature of a ptr
template <class T>
inline T* unconst(const T* t)
{ return const_cast<T*>(t); }
// Convert const gchar* to ustring, while treating NULL as empty string.
inline
Glib::ustring convert_const_gchar_ptr_to_ustring(const char* str)
{
return (str) ? Glib::ustring(str) : Glib::ustring();
}
// Convert const gchar* to std::string, while treating NULL as empty string.
inline
std::string convert_const_gchar_ptr_to_stdstring(const char* str)
{
return (str) ? std::string(str) : std::string();
}
// Convert a non-const gchar* return value to ustring, freeing it too.
inline
Glib::ustring convert_return_gchar_ptr_to_ustring(char* str)
{
return (str) ? Glib::ustring(Glib::ScopedPtr<char>(str).get())
: Glib::ustring();
}
// Convert a non-const gchar* return value to std::string, freeing it too.
inline
std::string convert_return_gchar_ptr_to_stdstring(char* str)
{
return (str) ? std::string(Glib::ScopedPtr<char>(str).get())
: std::string();
}
// Append type_name to dest, while replacing special characters with '+'.
void append_canonical_typename(std::string& dest, const char* type_name);
} // namespace Glib
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
#endif /* _GLIBMM_UTILITY_H */