-// -*- 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_args.hpp : functions for processing each argument
// (feed, feed_manip, and distribute)
// ----------------------------------------------------------------------------
+// Copyright Samuel Krempp 2003. Use, modification, and distribution are
+// subject to the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// See http://www.boost.org/libs/format for library home page
+
+// ----------------------------------------------------------------------------
#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/config.hpp>
+#include <boost/assert.hpp>
+#include <boost/throw_exception.hpp>
-#include "boost/format/msvc_disambiguater.hpp"
-#include "boost/throw_exception.hpp"
+#include <boost/format/format_class.hpp>
+#include <boost/format/group.hpp>
+#include <boost/format/detail/msvc_disambiguater.hpp>
namespace boost {
namespace io {
namespace detail {
-namespace {
-
- template<class Tr, class Ch> inline
- void empty_buf(BOOST_IO_STD basic_ostringstream<Ch,Tr> & os) {
- static const std::basic_string<Ch, Tr> emptyStr;
- os.str(emptyStr);
- }
- template<class Ch, class Tr>
- void do_pad( std::basic_string<Ch,Tr> & s,
- std::streamsize w,
- const Ch c,
- std::ios_base::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_base::left) {
- s.append(n, c);
+ template<class Ch, class Tr, class Alloc>
+ void mk_str( std::basic_string<Ch,Tr, Alloc> & res,
+ const Ch * beg,
+ typename std::basic_string<Ch,Tr,Alloc>::size_type size,
+ std::streamsize w,
+ const Ch fill_char,
+ std::ios_base::fmtflags f,
+ const Ch prefix_space, // 0 if no space-padding
+ bool center)
+ // applies centered/left/right padding to the string [beg, beg+size[
+ // Effects : the result is placed in res.
+ {
+ typedef typename std::basic_string<Ch,Tr,Alloc>::size_type size_type;
+ res.resize(0);
+ if(w<=0 || static_cast<size_type>(w) <=size) {
+ // no need to pad.
+ res.reserve(size + !!prefix_space);
+ if(prefix_space)
+ res.append(1, prefix_space);
+ if (size)
+ res.append(beg, size);
}
- else {
- s.insert(s.begin(), n, c);
+ else {
+ std::streamsize n=static_cast<std::streamsize>(w-size-!!prefix_space);
+ std::streamsize n_after = 0, n_before = 0;
+ res.reserve(static_cast<size_type>(w)); // allocate once for the 2 inserts
+ if(center)
+ n_after = n/2, n_before = n - n_after;
+ else
+ if(f & std::ios_base::left)
+ n_after = n;
+ else
+ n_before = n;
+ // now make the res string :
+ if(n_before) res.append(static_cast<size_type>(n_before), fill_char);
+ if(prefix_space)
+ res.append(1, prefix_space);
+ if (size)
+ res.append(beg, size);
+ if(n_after) res.append(static_cast<size_type>(n_after), fill_char);
}
- }
- } // -do_pad(..)
+ } // -mk_str(..)
-#if BOOST_WORKAROUND( BOOST_MSVC, <= 1300)
+#if BOOST_WORKAROUND( BOOST_MSVC, <= 1300) || \
+ BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042))
// MSVC needs to be tricked to disambiguate this simple overload..
// the trick is in "boost/format/msvc_disambiguater.hpp"
- template< class Ch, class Tr, class T> inline
- void put_head( BOOST_IO_STD basic_ostream<Ch, Tr>& os, const T& x ) {
- disambiguater<Ch, Tr, T>::put_head(os, x, 1L);
- }
- template< class Ch, class Tr, class T> inline
- void put_last( BOOST_IO_STD basic_ostream<Ch, Tr>& os, const T& x ) {
- disambiguater<Ch, Tr, T>::put_last(os, x, 1L);
- }
+ template< class Ch, class Tr, class T> inline
+ void put_head (BOOST_IO_STD basic_ostream<Ch, Tr> & os, const T& x ) {
+ disambiguater<Ch, Tr, T>::put_head(os, x, 1L);
+ }
+ template< class Ch, class Tr, class T> inline
+ void put_last (BOOST_IO_STD basic_ostream<Ch, Tr> & os, const T& x ) {
+ disambiguater<Ch, Tr, T>::put_last(os, x, 1L);
+ }
#else
- template< class Ch, class Tr, class T> inline
- void put_head(BOOST_IO_STD basic_ostream<Ch, Tr>& , const T& ) {
- }
+ template< class Ch, class Tr, class T> inline
+ void put_head (BOOST_IO_STD basic_ostream<Ch, Tr> &, const T& ) {
+ }
- template< class Ch, class Tr, class T> inline
- void put_head( BOOST_IO_STD basic_ostream<Ch, Tr>& os, const group1<T>& x ) {
- os << group_head(x.a1_); // send the first N-1 items, not the last
- }
+ template< class Ch, class Tr, class T> inline
+ void put_head( BOOST_IO_STD basic_ostream<Ch, Tr> & os, const group1<T>& x ) {
+ os << group_head(x.a1_); // send the first N-1 items, not the last
+ }
- template< class Ch, class Tr, class T> inline
- void put_last( BOOST_IO_STD basic_ostream<Ch, Tr>& os, const T& x ) {
- os << x ;
- }
+ template< class Ch, class Tr, class T> inline
+ void put_last( BOOST_IO_STD basic_ostream<Ch, Tr> & os, const T& x ) {
+ os << x ;
+ }
- template< class Ch, class Tr, class T> inline
- void put_last( BOOST_IO_STD basic_ostream<Ch, Tr>& os, const group1<T>& x ) {
- os << group_last(x.a1_); // this selects the last element
- }
+ template< class Ch, class Tr, class T> inline
+ void put_last( BOOST_IO_STD basic_ostream<Ch, Tr> & os, const group1<T>& x ) {
+ os << group_last(x.a1_); // this selects the last element
+ }
#ifndef BOOST_NO_OVERLOAD_FOR_NON_CONST
- template< class Ch, class Tr, class T> inline
- void put_head( BOOST_IO_STD basic_ostream<Ch, Tr>& , T& ) {
- }
+ template< class Ch, class Tr, class T> inline
+ void put_head( BOOST_IO_STD basic_ostream<Ch, Tr> &, T& ) {
+ }
- template< class Ch, class Tr, class T> inline
- void put_last( BOOST_IO_STD basic_ostream<Ch, Tr>& os, T& x ) {
- os << x ;
- }
+ template< class Ch, class Tr, class T> inline
+ void put_last( BOOST_IO_STD basic_ostream<Ch, Tr> & os, T& x) {
+ os << x ;
+ }
#endif
#endif // -msvc workaround
+ template< class Ch, class Tr, class Alloc, class T>
+ void put( T x,
+ const format_item<Ch, Tr, Alloc>& specs,
+ typename basic_format<Ch, Tr, Alloc>::string_type& res,
+ typename basic_format<Ch, Tr, Alloc>::internal_streambuf_t & buf,
+ io::detail::locale_t *loc_p = NULL)
+ {
+#ifdef BOOST_MSVC
+ // If std::min<unsigned> or std::max<unsigned> are already instantiated
+ // at this point then we get a blizzard of warning messages when we call
+ // those templates with std::size_t as arguments. Weird and very annoyning...
+#pragma warning(push)
+#pragma warning(disable:4267)
+#endif
+ // does the actual conversion of x, with given params, into a string
+ // using the supplied stringbuf.
-
-template< class Ch, class Tr, class T>
-void put( T x,
- const format_item<Ch, Tr>& specs,
- std::basic_string<Ch, Tr> & res,
- BOOST_IO_STD basic_ostringstream<Ch, Tr>& oss_ )
-{
- // does the actual conversion of x, with given params, into a string
- // using the *supplied* strinstream. (the stream state is important)
-
- typedef std::basic_string<Ch, Tr> string_t;
- typedef format_item<Ch, Tr> format_item_t;
+ typedef typename basic_format<Ch, Tr, Alloc>::string_type string_type;
+ typedef typename basic_format<Ch, Tr, Alloc>::format_item_t format_item_t;
+ typedef typename string_type::size_type size_type;
- stream_format_state<Ch, Tr> prev_state(oss_);
-
- specs.state_.apply_on(oss_);
+ basic_oaltstringstream<Ch, Tr, Alloc> oss( &buf);
+ specs.fmtstate_.apply_on(oss, loc_p);
- // in case x is a group, apply the manip part of it,
- // in order to find width
- put_head( oss_, x );
- empty_buf( oss_);
+ // the stream format state can be modified by manipulators in the argument :
+ put_head( oss, x );
+ // in case x is a group, apply the manip part of it,
+ // in order to find width
- const std::streamsize w=oss_.width();
- const std::ios_base::fmtflags fl=oss_.flags();
- const bool internal = (fl & std::ios_base::internal) != 0;
- const bool two_stepped_padding = internal
- && ! ( specs.pad_scheme_ & format_item_t::spacepad )
- && specs.truncate_ < 0 ;
+ const std::ios_base::fmtflags fl=oss.flags();
+ const bool internal = (fl & std::ios_base::internal) != 0;
+ const std::streamsize w = oss.width();
+ const bool two_stepped_padding= internal && (w!=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 && static_cast<unsigned int>(specs.truncate_) < res.size() )
- 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 );
+ res.resize(0);
+ if(! two_stepped_padding) {
+ if(w>0) // handle padding via mk_str, not natively in stream
+ oss.width(0);
+ put_last( oss, x);
+ const Ch * res_beg = buf.pbase();
+ Ch prefix_space = 0;
+ if(specs.pad_scheme_ & format_item_t::spacepad)
+ if(buf.pcount()== 0 ||
+ (res_beg[0] !=oss.widen('+') && res_beg[0] !=oss.widen('-') ))
+ prefix_space = oss.widen(' ');
+ size_type res_size = (std::min)(
+ static_cast<size_type>(specs.truncate_ - !!prefix_space),
+ buf.pcount() );
+ mk_str(res, res_beg, res_size, w, oss.fill(), fl,
+ prefix_space, (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 { // 2-stepped padding
+ // internal can be implied by zeropad, or user-set.
+ // left, right, and centered alignment overrule internal,
+ // but spacepad or truncate might be mixed with internal (using manipulator)
+ put_last( oss, x); // may pad
+ const Ch * res_beg = buf.pbase();
+ size_type res_size = buf.pcount();
+ bool prefix_space=false;
+ if(specs.pad_scheme_ & format_item_t::spacepad)
+ if(buf.pcount()== 0 ||
+ (res_beg[0] !=oss.widen('+') && res_beg[0] !=oss.widen('-') ))
+ prefix_space = true;
+ if(res_size == static_cast<size_type>(w) && w<=specs.truncate_ && !prefix_space) {
+ // okay, only one thing was printed and padded, so res is fine
+ res.assign(res_beg, res_size);
}
- 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 { // 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.
+ // Note that res_size<w is possible (in case of bad user-defined formatting)
+ res.assign(res_beg, res_size);
+ res_beg=NULL; // invalidate pointers.
+
+ // make a new stream, to start re-formatting from scratch :
+ buf.clear_buffer();
+ basic_oaltstringstream<Ch, Tr, Alloc> oss2( &buf);
+ specs.fmtstate_.apply_on(oss2, loc_p);
+ put_head( oss2, x );
+
+ oss2.width(0);
+ if(prefix_space)
+ oss2 << ' ';
+ put_last(oss2, x );
+ if(buf.pcount()==0 && specs.pad_scheme_ & format_item_t::spacepad) {
+ prefix_space =true;
+ oss2 << ' ';
+ }
+ // we now have the minimal-length output
+ const Ch * tmp_beg = buf.pbase();
+ size_type tmp_size = (std::min)(static_cast<size_type>(specs.truncate_),
+ buf.pcount() );
+
+
+ if(static_cast<size_type>(w) <= tmp_size) {
+ // minimal length is already >= w, so no padding (cool!)
+ res.assign(tmp_beg, tmp_size);
+ }
+ else { // hum.. we need to pad (multi_output, or spacepad present)
+ //find where we should pad
+ size_type sz = (std::min)(res_size + (prefix_space ? 1 : 0), tmp_size);
+ size_type i = prefix_space;
+ for(; i<sz && tmp_beg[i] == res[i - (prefix_space ? 1 : 0)]; ++i) {}
+ if(i>=tmp_size) i=prefix_space;
+ res.assign(tmp_beg, i);
+ std::streamsize d = w - static_cast<std::streamsize>(tmp_size);
+ BOOST_ASSERT(d>0);
+ res.append(static_cast<size_type>( d ), oss2.fill());
+ res.append(tmp_beg+i, tmp_size-i);
+ BOOST_ASSERT(i+(tmp_size-i)+(std::max)(d,(std::streamsize)0)
+ == static_cast<size_type>(w));
+ BOOST_ASSERT(res.size() == static_cast<size_type>(w));
+ }
}
}
- 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
-
-
-
+ buf.clear_buffer();
+#ifdef BOOST_MSVC
+#pragma warning(pop)
+#endif
+ } // end- put(..)
-template< class Ch, class Tr, class T>
-void distribute(basic_format<Ch,Tr>& 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<Ch, Tr, T> (x, self.items_[i], self.items_[i].res_, self.oss_ );
+ template< class Ch, class Tr, class Alloc, class T>
+ void distribute (basic_format<Ch,Tr, Alloc>& 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(self.cur_arg_, self.num_args_));
+ else return;
+ }
+ for(unsigned long i=0; i < self.items_.size(); ++i) {
+ if(self.items_[i].argN_ == self.cur_arg_) {
+ put<Ch, Tr, Alloc, T> (x, self.items_[i], self.items_[i].res_,
+ self.buf_, boost::get_pointer(self.loc_) );
+ }
}
}
-}
-template<class Ch, class Tr, class T>
-basic_format<Ch, Tr>& feed(basic_format<Ch,Tr>& self, T x)
-{
- if(self.dumped_) self.clear();
- distribute<Ch, Tr, T> (self, x);
- ++self.cur_arg_;
- if(self.bound_.size() != 0)
- {
- while( self.cur_arg_ < self.num_args_ && self.bound_[self.cur_arg_] )
+ template<class Ch, class Tr, class Alloc, class T>
+ basic_format<Ch, Tr, Alloc>&
+ feed (basic_format<Ch,Tr, Alloc>& self, T x) {
+ if(self.dumped_) self.clear();
+ distribute<Ch, Tr, Alloc, 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_;
+ }
+ return self;
}
-
- // this arg is finished, reset the stream's format state
- self.state0_.apply_on(self.oss_);
- return self;
-}
-
} // namespace detail
} // namespace io
} // namespace boost
projects / lyx.git / blobdiff