Squashed 'third_party/boostorg/format/' content from commit a1c6137
Change-Id: I7c2f1d4813c1e733fcf553b4ed9c418e661b0ea8
git-subtree-dir: third_party/boostorg/format
git-subtree-split: a1c613764dd96f97749e1e059c80f0f3515fcf0b
diff --git a/include/boost/format/alt_sstream.hpp b/include/boost/format/alt_sstream.hpp
new file mode 100644
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--- /dev/null
+++ b/include/boost/format/alt_sstream.hpp
@@ -0,0 +1,177 @@
+// ----------------------------------------------------------------------------
+// alt_sstream.hpp : alternative stringstream
+// ----------------------------------------------------------------------------
+
+// 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_SK_ALT_SSTREAM_HPP
+#define BOOST_SK_ALT_SSTREAM_HPP
+
+#include <string>
+#include <boost/format/detail/compat_workarounds.hpp>
+#include <boost/utility/base_from_member.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/config.hpp>
+#include <boost/assert.hpp>
+
+namespace boost {
+ namespace io {
+
+ template<class Ch, class Tr=::std::char_traits<Ch>,
+ class Alloc=::std::allocator<Ch> >
+ class basic_altstringbuf;
+
+ template<class Ch, class Tr =::std::char_traits<Ch>,
+ class Alloc=::std::allocator<Ch> >
+ class basic_oaltstringstream;
+
+
+ template<class Ch, class Tr, class Alloc>
+ class basic_altstringbuf
+ : public ::std::basic_streambuf<Ch, Tr>
+ {
+ typedef ::std::basic_streambuf<Ch, Tr> streambuf_t;
+ typedef typename CompatAlloc<Alloc>::compatible_type compat_allocator_type;
+ typedef typename CompatTraits<Tr>::compatible_type compat_traits_type;
+ public:
+ typedef Ch char_type;
+ typedef Tr traits_type;
+ typedef typename compat_traits_type::int_type int_type;
+ typedef typename compat_traits_type::pos_type pos_type;
+ typedef typename compat_traits_type::off_type off_type;
+ typedef Alloc allocator_type;
+ typedef ::std::basic_string<Ch, Tr, Alloc> string_type;
+ typedef typename string_type::size_type size_type;
+
+ typedef ::std::streamsize streamsize;
+
+
+ explicit basic_altstringbuf(std::ios_base::openmode mode
+ = std::ios_base::in | std::ios_base::out)
+ : putend_(NULL), is_allocated_(false), mode_(mode)
+ {}
+ explicit basic_altstringbuf(const string_type& s,
+ ::std::ios_base::openmode mode
+ = ::std::ios_base::in | ::std::ios_base::out)
+ : putend_(NULL), is_allocated_(false), mode_(mode)
+ { dealloc(); str(s); }
+ virtual ~basic_altstringbuf() BOOST_NOEXCEPT_OR_NOTHROW
+ { dealloc(); }
+ using streambuf_t::pbase;
+ using streambuf_t::pptr;
+ using streambuf_t::epptr;
+ using streambuf_t::eback;
+ using streambuf_t::gptr;
+ using streambuf_t::egptr;
+
+ void clear_buffer();
+ void str(const string_type& s);
+
+ // 0-copy access :
+ Ch * begin() const;
+ size_type size() const;
+ size_type cur_size() const; // stop at current pointer
+ Ch * pend() const // the highest position reached by pptr() since creation
+ { return ((putend_ < pptr()) ? pptr() : putend_); }
+ size_type pcount() const
+ { return static_cast<size_type>( pptr() - pbase()) ;}
+
+ // copy buffer to string :
+ string_type str() const
+ { return string_type(begin(), size()); }
+ string_type cur_str() const
+ { return string_type(begin(), cur_size()); }
+ protected:
+ explicit basic_altstringbuf (basic_altstringbuf * s,
+ ::std::ios_base::openmode mode
+ = ::std::ios_base::in | ::std::ios_base::out)
+ : putend_(NULL), is_allocated_(false), mode_(mode)
+ { dealloc(); str(s); }
+
+ virtual pos_type seekoff(off_type off, ::std::ios_base::seekdir way,
+ ::std::ios_base::openmode which
+ = ::std::ios_base::in | ::std::ios_base::out);
+ virtual pos_type seekpos (pos_type pos,
+ ::std::ios_base::openmode which
+ = ::std::ios_base::in | ::std::ios_base::out);
+ virtual int_type underflow();
+ virtual int_type pbackfail(int_type meta = compat_traits_type::eof());
+ virtual int_type overflow(int_type meta = compat_traits_type::eof());
+ void dealloc();
+ private:
+ enum { alloc_min = 256}; // minimum size of allocations
+
+ Ch *putend_; // remembers (over seeks) the highest value of pptr()
+ bool is_allocated_;
+ ::std::ios_base::openmode mode_;
+ compat_allocator_type alloc_; // the allocator object
+ };
+
+
+// --- class basic_oaltstringstream ----------------------------------------
+ template <class Ch, class Tr, class Alloc>
+ class basic_oaltstringstream
+ : private base_from_member< shared_ptr< basic_altstringbuf< Ch, Tr, Alloc> > >,
+ public ::std::basic_ostream<Ch, Tr>
+ {
+ class No_Op {
+ // used as no-op deleter for (not-owner) shared_pointers
+ public:
+ template<class T>
+ const T & operator()(const T & arg) { return arg; }
+ };
+ typedef ::std::basic_ostream<Ch, Tr> stream_t;
+ typedef boost::base_from_member<boost::shared_ptr<
+ basic_altstringbuf<Ch,Tr, Alloc> > >
+ pbase_type;
+ typedef ::std::basic_string<Ch, Tr, Alloc> string_type;
+ typedef typename string_type::size_type size_type;
+ typedef basic_altstringbuf<Ch, Tr, Alloc> stringbuf_t;
+ public:
+ typedef Alloc allocator_type;
+ basic_oaltstringstream()
+ : pbase_type(new stringbuf_t), stream_t(pbase_type::member.get())
+ { }
+ basic_oaltstringstream(::boost::shared_ptr<stringbuf_t> buf)
+ : pbase_type(buf), stream_t(pbase_type::member.get())
+ { }
+ basic_oaltstringstream(stringbuf_t * buf)
+ : pbase_type(buf, No_Op() ), stream_t(pbase_type::member.get())
+ { }
+ stringbuf_t * rdbuf() const
+ { return pbase_type::member.get(); }
+ void clear_buffer()
+ { rdbuf()->clear_buffer(); }
+
+ // 0-copy access :
+ Ch * begin() const
+ { return rdbuf()->begin(); }
+ size_type size() const
+ { return rdbuf()->size(); }
+ size_type cur_size() const // stops at current position
+ { return rdbuf()->cur_size(); }
+
+ // copy buffer to string :
+ string_type str() const // [pbase, epptr[
+ { return rdbuf()->str(); }
+ string_type cur_str() const // [pbase, pptr[
+ { return rdbuf()->cur_str(); }
+ void str(const string_type& s)
+ { rdbuf()->str(s); }
+ };
+
+ } // N.S. io
+} // N.S. boost
+
+#include <boost/format/alt_sstream_impl.hpp>
+
+#endif // include guard
+