Squashed 'src/beast/' content from commit 43e6d34

git-subtree-dir: src/beast
git-subtree-split: 43e6d345e4

modules/beast_asio/basics/ContentBodyBuffer.cpp

@@ -0,0 +1,101 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of Beast: https://github.com/vinniefalco/Beast
+    Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+ContentBodyBuffer::ContentBodyBuffer (size_type blocksize)
+    : m_blocksize (blocksize)
+    , m_size (0)
+{
+}
+
+ContentBodyBuffer::~ContentBodyBuffer ()
+{
+    for (Handles::iterator iter (m_handles.begin());
+        iter != m_handles.end(); ++iter)
+    {
+        void* const buffer (*iter);
+        std::free (buffer);
+    }
+}
+
+void ContentBodyBuffer::swapWith (ContentBodyBuffer& other)
+{
+    std::swap (m_blocksize, other.m_blocksize);
+    std::swap (m_size, other.m_size);
+    m_handles.swap (other.m_handles);
+}
+
+void ContentBodyBuffer::commit (size_type n)
+{
+    m_size += n;
+    bassert (m_size <= m_handles.size () * m_blocksize);
+}
+
+ConstBuffers ContentBodyBuffer::data () const
+{
+    size_type n (m_size);
+    std::vector <ConstBuffer> v;
+    v.reserve ((m_size + m_blocksize - 1) / m_blocksize);
+    for (Handles::const_iterator iter (m_handles.begin());
+        iter != m_handles.end() && n > 0; ++iter)
+    {
+        size_type const amount (std::min (n, m_blocksize));
+        v.push_back (MutableBuffer (*iter, amount));
+        n -= amount;
+    }
+    return ConstBuffers (v);
+}
+
+ContentBodyBuffer::size_type ContentBodyBuffer::size () const
+{
+    return m_size;
+}
+
+MutableBuffers ContentBodyBuffer::prepare (size_type n)
+{
+    reserve (n);
+    std::vector <MutableBuffer> v;
+    size_type offset (m_size % m_blocksize);
+    for (Handles::iterator iter = m_handles.begin () + (m_size / m_blocksize);
+        iter != m_handles.end () && n > 0; ++iter)
+    {
+        size_type const amount (std::min (n, m_blocksize - offset));
+        v.push_back (MutableBuffer (*iter, amount));
+        n -= amount;
+        offset = 0;
+    }
+    return MutableBuffers (v);
+}
+
+void ContentBodyBuffer::reserve (size_type n)
+{
+    size_type count ((m_size + n + m_blocksize - 1) / m_blocksize);
+    if (count > m_handles.size ())
+        for (count -= m_handles.size (); count-- > 0;)
+            m_handles.push_back (std::malloc (m_blocksize));
+}
+
+void ContentBodyBuffer::shrink_to_fit ()
+{
+    size_type const count ((m_size + m_blocksize - 1) / m_blocksize);
+    while (m_handles.size () > count)
+    {
+        std::free (m_handles.back ());
+        m_handles.erase (m_handles.end () - 1);
+    }   
+}