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