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* Added the Boost format library which provides a safe printf

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replacement.
This commit is contained in:
Eelco Dolstra 2003-06-27 13:41:42 +00:00
parent d4c3edfaba
commit bb03c45ca0
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boost/format/free_funcs.hpp Normal file
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// -*- C++ -*-
// Boost general library 'format' ---------------------------
// See http://www.boost.org for updates, documentation, and revision history.
// (C) Samuel Krempp 2001
// krempp@crans.ens-cachan.fr
// Permission to copy, use, modify, sell and
// distribute this software is granted provided this copyright notice appears
// in all copies. This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
// ideas taken from Rüdiger Loos's format class
// and Karl Nelson's ofstream (also took its parsing code as basis for printf parsing)
// ------------------------------------------------------------------------------
// free_funcs.hpp : implementation of the free functions declared in namespace format
// ------------------------------------------------------------------------------
#ifndef BOOST_FORMAT_FUNCS_HPP
#define BOOST_FORMAT_FUNCS_HPP
#include "boost/format/format_class.hpp"
//#include "boost/throw_exception.hpp"
namespace boost {
namespace io {
template<class Ch, class Tr> inline
std::basic_string<Ch, Tr> str(const basic_format<Ch, Tr>& f)
// adds up all pieces of strings and converted items, and return the formatted string
{
return f.str();
}
} // - namespace io
template< class Ch, class Tr>
BOOST_IO_STD basic_ostream<Ch, Tr>&
operator<<( BOOST_IO_STD basic_ostream<Ch, Tr>& os,
const boost::basic_format<Ch, Tr>& f)
// effect: "return os << str(f);" but we can try to do it faster
{
typedef boost::basic_format<Ch, Tr> format_t;
if(f.items_.size()==0)
os << f.prefix_;
else {
if(f.cur_arg_ < f.num_args_)
if( f.exceptions() & io::too_few_args_bit )
boost::throw_exception(io::too_few_args()); // not enough variables have been supplied !
if(f.style_ & format_t::special_needs)
os << f.str();
else {
// else we dont have to count chars output, so we dump directly to os :
os << f.prefix_;
for(unsigned long i=0; i<f.items_.size(); ++i)
{
const typename format_t::format_item_t& item = f.items_[i];
os << item.res_;
os << item.appendix_;
}
}
}
f.dumped_=true;
return os;
}
} // namespace boost
#endif // BOOST_FORMAT_FUNCS_HPP