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Diffstat (limited to '3rdParty/Boost/src/boost/format/feed_args.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/format/feed_args.hpp | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/format/feed_args.hpp b/3rdParty/Boost/src/boost/format/feed_args.hpp new file mode 100644 index 0000000..53243dc --- /dev/null +++ b/3rdParty/Boost/src/boost/format/feed_args.hpp @@ -0,0 +1,277 @@ +// ---------------------------------------------------------------------------- +// 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/config.hpp> +#include <boost/assert.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 { + + 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 { + 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); + } + } // -mk_str(..) + + +#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); + } + +#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> & 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 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_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. + + 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; + + basic_oaltstringstream<Ch, Tr, Alloc> oss( &buf); + specs.fmtstate_.apply_on(oss, loc_p); + + // 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::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); + + 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 + // 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 { // 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)); + } + } + } + buf.clear_buffer(); +#ifdef BOOST_MSVC +#pragma warning(pop) +#endif + } // end- put(..) + + + 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 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; + } + +} // namespace detail +} // namespace io +} // namespace boost + + +#endif // BOOST_FORMAT_FEED_ARGS_HPP |