1/* Class autosprintf - formatted output to an ostream. 2 Copyright (C) 2002 Free Software Foundation, Inc. 3 4 This program is free software; you can redistribute it and/or modify it 5 under the terms of the GNU Library General Public License as published 6 by the Free Software Foundation; either version 2, or (at your option) 7 any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Library General Public License for more details. 13 14 You should have received a copy of the GNU Library General Public 15 License along with this program; if not, write to the Free Software 16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 17 USA. */ 18 19#ifndef _AUTOSPRINTF_H 20#define _AUTOSPRINTF_H 21 22#ifndef __attribute__ 23/* This feature is available in gcc versions 2.5 and later. */ 24# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__ 25# define __attribute__(Spec) /* empty */ 26# endif 27/* The __-protected variants of `format' and `printf' attributes 28 are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */ 29# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7) 30# define __format__ format 31# define __printf__ printf 32# endif 33#endif 34 35#include <string> 36#include <iostream> 37 38namespace gnu 39{ 40 /* A temporary object, usually allocated on the stack, representing 41 the result of an asprintf() call. */ 42 class autosprintf 43 { 44 public: 45 /* Constructor: takes a format string and the printf arguments. */ 46 autosprintf (const char *format, ...) 47 __attribute__ ((__format__ (__printf__, 2, 3))); 48 /* Copy constructor. */ 49 autosprintf (const autosprintf& src); 50 /* Destructor: frees the temporarily allocated string. */ 51 ~autosprintf (); 52 /* Conversion to string. */ 53 operator char * () const; 54 operator std::string () const; 55 /* Output to an ostream. */ 56 friend inline std::ostream& operator<< (std::ostream& stream, const autosprintf& tmp) 57 { 58 stream << (tmp.str ? tmp.str : "(error in autosprintf)"); 59 return stream; 60 } 61 private: 62 char *str; 63 }; 64} 65 66#endif /* _AUTOSPRINTF_H */ 67