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66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
/* Class autosprintf - formatted output to an ostream.
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Copyright (C) 2002 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU Library General Public License as published
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by the Free Software Foundation; either version 2, or (at your option)
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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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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USA. */
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#ifndef _AUTOSPRINTF_H
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#define _AUTOSPRINTF_H
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#ifndef __attribute__
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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 __attribute__(Spec) /* empty */
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# endif
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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 __format__ format
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# define __printf__ printf
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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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__attribute__ ((__format__ (__printf__, 2, 3)));
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/* Copy constructor. */
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autosprintf (const autosprintf& src);
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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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