From 08c1e93fa36a49f49325a07fe91ff92c964c2b6c Mon Sep 17 00:00:00 2001
From: Chanho Park <chanho61.park@samsung.com>
Date: Thu, 11 Dec 2014 18:55:56 +0900
Subject: Imported Upstream version 1.57.0

---
 boost/detail/basic_pointerbuf.hpp | 139 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 boost/detail/basic_pointerbuf.hpp

(limited to 'boost/detail/basic_pointerbuf.hpp')

diff --git a/boost/detail/basic_pointerbuf.hpp b/boost/detail/basic_pointerbuf.hpp
new file mode 100644
index 0000000000..1d8cf373b3
--- /dev/null
+++ b/boost/detail/basic_pointerbuf.hpp
@@ -0,0 +1,139 @@
+//-----------------------------------------------------------------------------
+// boost detail/templated_streams.hpp header file
+// See http://www.boost.org for updates, documentation, and revision history.
+//-----------------------------------------------------------------------------
+//
+// Copyright (c) 2013 John Maddock, Antony Polukhin
+// 
+//
+// Distributed under 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)
+
+#ifndef BOOST_DETAIL_BASIC_POINTERBUF_HPP
+#define BOOST_DETAIL_BASIC_POINTERBUF_HPP
+
+// MS compatible compilers support #pragma once
+#if defined(_MSC_VER)
+# pragma once
+#endif
+
+#include "boost/config.hpp"
+#include <streambuf>
+
+namespace boost { namespace detail {
+
+//
+// class basic_pointerbuf:
+// acts as a stream buffer which wraps around a pair of pointers:
+//
+template <class charT, class BufferT >
+class basic_pointerbuf : public BufferT {
+protected:
+   typedef BufferT base_type;
+   typedef basic_pointerbuf<charT, BufferT> this_type;
+   typedef typename base_type::int_type int_type;
+   typedef typename base_type::char_type char_type;
+   typedef typename base_type::pos_type pos_type;
+   typedef ::std::streamsize streamsize;
+   typedef typename base_type::off_type off_type;
+
+public:
+   basic_pointerbuf() : base_type() { setbuf(0, 0); }
+   const charT* getnext() { return this->gptr(); }
+
+#ifndef BOOST_NO_USING_TEMPLATE
+    using base_type::pptr;
+    using base_type::pbase;
+#else
+    charT* pptr() const { return base_type::pptr(); }
+    charT* pbase() const { return base_type::pbase(); }
+#endif
+
+protected:
+   // VC mistakenly assumes that `setbuf` and other functions are not referenced.
+   // Marking those functions with `inline` suppresses the warnings.
+   // There must be no harm from marking virtual functions as inline: inline virtual
+   // call can be inlined ONLY when the compiler knows the "exact class".
+   inline base_type* setbuf(char_type* s, streamsize n);
+   inline typename this_type::pos_type seekpos(pos_type sp, ::std::ios_base::openmode which);
+   inline typename this_type::pos_type seekoff(off_type off, ::std::ios_base::seekdir way, ::std::ios_base::openmode which);
+
+private:
+   basic_pointerbuf& operator=(const basic_pointerbuf&);
+   basic_pointerbuf(const basic_pointerbuf&);
+};
+
+template<class charT, class BufferT>
+BufferT*
+basic_pointerbuf<charT, BufferT>::setbuf(char_type* s, streamsize n)
+{
+   this->setg(s, s, s + n);
+   return this;
+}
+
+template<class charT, class BufferT>
+typename basic_pointerbuf<charT, BufferT>::pos_type
+basic_pointerbuf<charT, BufferT>::seekoff(off_type off, ::std::ios_base::seekdir way, ::std::ios_base::openmode which)
+{
+   typedef typename boost::int_t<sizeof(way) * CHAR_BIT>::least cast_type;
+
+   if(which & ::std::ios_base::out)
+      return pos_type(off_type(-1));
+   std::ptrdiff_t size = this->egptr() - this->eback();
+   std::ptrdiff_t pos = this->gptr() - this->eback();
+   charT* g = this->eback();
+   switch(static_cast<cast_type>(way))
+   {
+   case ::std::ios_base::beg:
+      if((off < 0) || (off > size))
+         return pos_type(off_type(-1));
+      else
+         this->setg(g, g + off, g + size);
+      break;
+   case ::std::ios_base::end:
+      if((off < 0) || (off > size))
+         return pos_type(off_type(-1));
+      else
+         this->setg(g, g + size - off, g + size);
+      break;
+   case ::std::ios_base::cur:
+   {
+      std::ptrdiff_t newpos = static_cast<std::ptrdiff_t>(pos + off);
+      if((newpos < 0) || (newpos > size))
+         return pos_type(off_type(-1));
+      else
+         this->setg(g, g + newpos, g + size);
+      break;
+   }
+   default: ;
+   }
+#ifdef BOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable:4244)
+#endif
+   return static_cast<pos_type>(this->gptr() - this->eback());
+#ifdef BOOST_MSVC
+#pragma warning(pop)
+#endif
+}
+
+template<class charT, class BufferT>
+typename basic_pointerbuf<charT, BufferT>::pos_type
+basic_pointerbuf<charT, BufferT>::seekpos(pos_type sp, ::std::ios_base::openmode which)
+{
+   if(which & ::std::ios_base::out)
+      return pos_type(off_type(-1));
+   off_type size = static_cast<off_type>(this->egptr() - this->eback());
+   charT* g = this->eback();
+   if(off_type(sp) <= size)
+   {
+      this->setg(g, g + off_type(sp), g + size);
+   }
+   return pos_type(off_type(-1));
+}
+
+}} // namespace boost::detail
+
+#endif // BOOST_DETAIL_BASIC_POINTERBUF_HPP
+
-- 
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