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-rw-r--r--src/boost/format/feed_args.hpp254
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diff --git a/src/boost/format/feed_args.hpp b/src/boost/format/feed_args.hpp
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--- a/src/boost/format/feed_args.hpp
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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
-
-// ----------------------------------------------------------------------------
-// feed_args.hpp : functions for processing each argument
-// (feed, feed_manip, and distribute)
-// ----------------------------------------------------------------------------
-
-
-#ifndef BOOST_FORMAT_FEED_ARGS_HPP
-#define BOOST_FORMAT_FEED_ARGS_HPP
-
-#include "boost/format/format_class.hpp"
-#include "boost/format/group.hpp"
-
-#include "boost/throw_exception.hpp"
-
-namespace boost {
-namespace io {
-namespace detail {
-namespace {
-
- inline
- void empty_buf(BOOST_IO_STD ostringstream & os) {
- static const std::string emptyStr;
- os.str(emptyStr);
- }
-
- void do_pad( std::string & s,
- std::streamsize w,
- const char c,
- std::ios::fmtflags f,
- bool center)
- __attribute__ ((unused));
-
- void do_pad( std::string & s,
- std::streamsize w,
- const char c,
- std::ios::fmtflags f,
- bool center)
- // applies centered / left / right padding to the string s.
- // Effects : string s is padded.
- {
- std::streamsize n=w-s.size();
- if(n<=0) {
- return;
- }
- if(center)
- {
- s.reserve(w); // allocate once for the 2 inserts
- const std::streamsize n1 = n /2, n0 = n - n1;
- s.insert(s.begin(), n0, c);
- s.append(n1, c);
- }
- else
- {
- if(f & std::ios::left) {
- s.append(n, c);
- }
- else {
- s.insert(s.begin(), n, c);
- }
- }
- } // -do_pad(..)
-
-
- template<class T> inline
- void put_head(BOOST_IO_STD ostream& , const T& ) {
- }
-
- template<class T> inline
- void put_head( BOOST_IO_STD ostream& os, const group1<T>& x ) {
- os << group_head(x.a1_); // send the first N-1 items, not the last
- }
-
- template<class T> inline
- void put_last( BOOST_IO_STD ostream& os, const T& x ) {
- os << x ;
- }
-
- template<class T> inline
- void put_last( BOOST_IO_STD ostream& os, const group1<T>& x ) {
- os << group_last(x.a1_); // this selects the last element
- }
-
-#ifndef BOOST_NO_OVERLOAD_FOR_NON_CONST
- template<class T> inline
- void put_head( BOOST_IO_STD ostream& , T& ) {
- }
-
- template<class T> inline
- void put_last( BOOST_IO_STD ostream& os, T& x ) {
- os << x ;
- }
-#endif
-
-
-
-
-template<class T>
-void put( T x,
- const format_item& specs,
- std::string & res,
- BOOST_IO_STD ostringstream& oss_ )
-{
- // does the actual conversion of x, with given params, into a string
- // using the *supplied* strinstream. (the stream state is important)
-
- typedef std::string string_t;
- typedef format_item format_item_t;
-
- stream_format_state prev_state(oss_);
-
- specs.state_.apply_on(oss_);
-
- // in case x is a group, apply the manip part of it,
- // in order to find width
- put_head( oss_, x );
- empty_buf( oss_);
-
- const std::streamsize w=oss_.width();
- const std::ios::fmtflags fl=oss_.flags();
- const bool internal = (fl & std::ios::internal) != 0;
- const bool two_stepped_padding = internal
- && ! ( specs.pad_scheme_ & format_item_t::spacepad )
- && specs.truncate_ < 0 ;
-
-
- if(! two_stepped_padding)
- {
- if(w>0) // handle simple padding via do_pad, not natively in stream
- oss_.width(0);
- put_last( oss_, x);
- res = oss_.str();
-
- if (specs.truncate_ >= 0)
- res.erase(specs.truncate_);
-
- // complex pads :
- if(specs.pad_scheme_ & format_item_t::spacepad)
- {
- if( res.size()==0 || ( res[0]!='+' && res[0]!='-' ))
- {
- res.insert(res.begin(), 1, ' '); // insert 1 space at pos 0
- }
- }
- if(w > 0) // need do_pad
- {
- do_pad(res,w,oss_.fill(), fl, (specs.pad_scheme_ & format_item_t::centered) !=0 );
- }
- }
- else // 2-stepped padding
- {
- put_last( oss_, x); // oss_.width() may result in padding.
- res = oss_.str();
-
- if (specs.truncate_ >= 0)
- res.erase(specs.truncate_);
-
- if( res.size() - w > 0)
- { // length w exceeded
- // either it was multi-output with first output padding up all width..
- // either it was one big arg and we are fine.
- empty_buf( oss_);
- oss_.width(0);
- put_last(oss_, x );
- string_t tmp = oss_.str(); // minimal-length output
- std::streamsize d;
- if( (d=w - tmp.size()) <=0 )
- {
- // minimal length is already >= w, so no padding (cool!)
- res.swap(tmp);
- }
- else
- { // hum.. we need to pad (it was necessarily multi-output)
- typedef typename string_t::size_type size_type;
- size_type i = 0;
- while( i<tmp.size() && tmp[i] == res[i] ) // find where we should pad.
- ++i;
- tmp.insert(i, static_cast<size_type>( d ), oss_.fill());
- res.swap( tmp );
- }
- }
- else
- { // okay, only one thing was printed and padded, so res is fine.
- }
- }
-
- prev_state.apply_on(oss_);
- empty_buf( oss_);
- oss_.clear();
-} // end- put(..)
-
-
-} // local namespace
-
-
-
-
-
-template<class T>
-void distribute(basic_format& self, T x)
- // call put(x, ..) on every occurence of the current argument :
-{
- if(self.cur_arg_ >= self.num_args_)
- {
- if( self.exceptions() & too_many_args_bit )
- boost::throw_exception(too_many_args()); // too many variables have been supplied !
- else return;
- }
- for(unsigned long i=0; i < self.items_.size(); ++i)
- {
- if(self.items_[i].argN_ == self.cur_arg_)
- {
- put<T> (x, self.items_[i], self.items_[i].res_, self.oss_ );
- }
- }
-}
-
-template<class T>
-basic_format& feed(basic_format& self, T x)
-{
- if(self.dumped_) self.clear();
- distribute<T> (self, x);
- ++self.cur_arg_;
- if(self.bound_.size() != 0)
- {
- while( self.cur_arg_ < self.num_args_ && self.bound_[self.cur_arg_] )
- ++self.cur_arg_;
- }
-
- // this arg is finished, reset the stream's format state
- self.state0_.apply_on(self.oss_);
- return self;
-}
-
-
-} // namespace detail
-} // namespace io
-} // namespace boost
-
-
-#endif // BOOST_FORMAT_FEED_ARGS_HPP
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