134 lines
2.8 KiB
C++
134 lines
2.8 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2015 Danny Robson <danny@nerdcruft.net>
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*/
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#include "linear.hpp"
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#include "../../pointer.hpp"
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#include "../../debug.hpp"
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using cruft::alloc::raw::linear;
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///////////////////////////////////////////////////////////////////////////////
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linear::linear (cruft::view<std::byte*> _data):
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m_begin (_data.begin ()),
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m_end (_data.end ()),
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m_cursor (_data.begin ())
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{ ; }
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///////////////////////////////////////////////////////////////////////////////
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linear::linear (linear &&rhs)
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: m_begin (std::exchange (rhs.m_begin, nullptr))
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, m_end (std::exchange (rhs.m_end, nullptr))
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, m_cursor (std::exchange (rhs.m_cursor, nullptr))
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{ ; }
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//-----------------------------------------------------------------------------
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linear&
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linear::operator= (cruft::alloc::raw::linear &&rhs)
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{
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m_begin = std::exchange (rhs.m_begin, nullptr);
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m_end = std::exchange (rhs.m_end, nullptr);
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m_cursor = std::exchange (rhs.m_cursor, nullptr);
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return *this;
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}
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///////////////////////////////////////////////////////////////////////////////
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std::byte*
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linear::data (void)
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{
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return m_begin;
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}
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//-----------------------------------------------------------------------------
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const std::byte*
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linear::data (void) const
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{
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return m_begin;
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}
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//-----------------------------------------------------------------------------
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std::byte*
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linear::begin (void)
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{
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return m_begin;
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}
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//-----------------------------------------------------------------------------
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const std::byte*
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linear::begin (void) const
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{
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return m_begin;
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}
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//-----------------------------------------------------------------------------
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std::byte*
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linear::end (void)
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{
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return m_end;
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}
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//-----------------------------------------------------------------------------
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const std::byte*
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linear::end (void) const
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{
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return m_end;
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}
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//-----------------------------------------------------------------------------
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size_t
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linear::offset (const void *_ptr) const
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{
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auto ptr = reinterpret_cast<const std::byte*> (_ptr);
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CHECK_GE (ptr, m_begin);
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return ptr - m_begin;
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}
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///////////////////////////////////////////////////////////////////////////////
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void
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linear::reset (void)
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{
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m_cursor = m_begin;
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}
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///////////////////////////////////////////////////////////////////////////////
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size_t
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linear::capacity (void) const
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{
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return m_end - m_begin;
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}
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//-----------------------------------------------------------------------------
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size_t
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linear::used (void) const
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{
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return m_cursor - m_begin;
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}
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//-----------------------------------------------------------------------------
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size_t
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linear::remain (void) const
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{
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return capacity () - used ();
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}
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