/* Class autosprintf - formatted output to an ostream.

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Copyright (C) 2002, 2012-2016 Free Software Foundation, Inc.

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This program is free software: you can redistribute it and/or modify

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it under the terms of the GNU Lesser General Public License as published by

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the Free Software Foundation; either version 2.1 of the License, or

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(at your option) any later version.

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This program is distributed in the hope that it will be useful,

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but WITHOUT ANY WARRANTY; without even the implied warranty of

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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GNU Lesser General Public License for more details.

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You should have received a copy of the GNU Lesser General Public License

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along with this program. If not, see <http://www.gnu.org/licenses/>. */

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#ifndef _AUTOSPRINTF_H

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#define _AUTOSPRINTF_H

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/* This feature is available in gcc versions 2.5 and later. */

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#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__

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# define _AUTOSPRINTF_ATTRIBUTE_FORMAT() /* empty */

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#else

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/* The __-protected variants of 'format' and 'printf' attributes

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are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */

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# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)

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# define _AUTOSPRINTF_ATTRIBUTE_FORMAT() \

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__attribute__ ((__format__ (__printf__, 2, 3)))

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# else

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# define _AUTOSPRINTF_ATTRIBUTE_FORMAT() \

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__attribute__ ((format (printf, 2, 3)))

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# endif

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#endif

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#include <string>

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#include <iostream>

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namespace gnu

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{

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/* A temporary object, usually allocated on the stack, representing

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the result of an asprintf() call. */

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class autosprintf

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{

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public:

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/* Constructor: takes a format string and the printf arguments. */

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autosprintf (const char *format, ...)

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_AUTOSPRINTF_ATTRIBUTE_FORMAT();

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/* Copy constructor. */

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autosprintf (const autosprintf& src);

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autosprintf& operator = (autosprintf copy);

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/* Destructor: frees the temporarily allocated string. */

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~autosprintf ();

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/* Conversion to string. */

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operator char * () const;

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operator std::string () const;

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/* Output to an ostream. */

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friend inline std::ostream& operator<< (std::ostream& stream, const autosprintf& tmp)

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{

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stream << (tmp.str ? tmp.str : "(error in autosprintf)");

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return stream;

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}

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private:

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char *str;

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};

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}

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#endif /* _AUTOSPRINTF_H */

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