/* Class autosprintf - formatted output to an ostream.
Copyright (C) 2002 Free Software Foundation, Inc.
This program 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, or (at your option)
any later version.
This program 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 program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
USA. */
#ifndef _AUTOSPRINTF_H
#define _AUTOSPRINTF_H
#ifndef __attribute__
/* This feature is available in gcc versions 2.5 and later. */
# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__
# define __attribute__(Spec) /* empty */
# endif
/* The __-protected variants of `format' and `printf' attributes
are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */
# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
# define __format__ format
# define __printf__ printf
# endif
#endif
#include <string>
#include <iostream>
namespace gnu
{
/* A temporary object, usually allocated on the stack, representing
the result of an asprintf() call. */
class autosprintf
{
public:
/* Constructor: takes a format string and the printf arguments. */
autosprintf (const char *format, ...)
__attribute__ ((__format__ (__printf__, 2, 3)));
/* Copy constructor. */
autosprintf (const autosprintf& src);
/* Destructor: frees the temporarily allocated string. */
~autosprintf ();
/* Conversion to string. */
operator char * () const;
operator std::string () const;
/* Output to an ostream. */
friend inline std::ostream& operator<< (std::ostream& stream, const autosprintf& tmp)
{
stream << (tmp.str ? tmp.str : "(error in autosprintf)");
return stream;
}
private:
char *str;
};
}
