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+// AsmJit - Machine code generation for C++
+//
+//  * Official AsmJit Home Page: https://asmjit.com
+//  * Official Github Repository: https://github.com/asmjit/asmjit
+//
+// Copyright (c) 2008-2020 The AsmJit Authors
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would be
+//    appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+//    misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+#ifndef ASMJIT_CORE_CODEBUFFER_H_INCLUDED
+#define ASMJIT_CORE_CODEBUFFER_H_INCLUDED
+
+#include "../core/globals.h"
+
+ASMJIT_BEGIN_NAMESPACE
+
+//! \addtogroup asmjit_core
+//! \{
+
+// ============================================================================
+// [asmjit::CodeBuffer]
+// ============================================================================
+
+//! Code or data buffer.
+struct CodeBuffer {
+  //! The content of the buffer (data).
+  uint8_t* _data;
+  //! Number of bytes of `data` used.
+  size_t _size;
+  //! Buffer capacity (in bytes).
+  size_t _capacity;
+  //! Buffer flags.
+  uint32_t _flags;
+
+  //! Code buffer flags.
+  enum Flags : uint32_t {
+    //! Buffer is external (not allocated by asmjit).
+    kFlagIsExternal = 0x00000001u,
+    //! Buffer is fixed (cannot be reallocated).
+    kFlagIsFixed = 0x00000002u
+  };
+
+  //! \name Overloaded Operators
+  //! \{
+
+  //! Returns a referebce to the byte at the given `index`.
+  inline uint8_t& operator[](size_t index) noexcept {
+    ASMJIT_ASSERT(index < _size);
+    return _data[index];
+  }
+  //! \overload
+  inline const uint8_t& operator[](size_t index) const noexcept {
+    ASMJIT_ASSERT(index < _size);
+    return _data[index];
+  }
+
+  //! \}
+
+  //! \name Accessors
+  //! \{
+
+  //! Returns code buffer flags, see \ref Flags.
+  inline uint32_t flags() const noexcept { return _flags; }
+  //! Tests whether the code buffer has the given `flag` set.
+  inline bool hasFlag(uint32_t flag) const noexcept { return (_flags & flag) != 0; }
+
+  //! Tests whether this code buffer has a fixed size.
+  //!
+  //! Fixed size means that the code buffer is fixed and cannot grow.
+  inline bool isFixed() const noexcept { return hasFlag(kFlagIsFixed); }
+
+  //! Tests whether the data in this code buffer is external.
+  //!
+  //! External data can only be provided by users, it's never used by AsmJit.
+  inline bool isExternal() const noexcept { return hasFlag(kFlagIsExternal); }
+
+  //! Tests whether the data in this code buffer is allocated (non-null).
+  inline bool isAllocated() const noexcept { return _data != nullptr; }
+
+  //! Tests whether the code buffer is empty.
+  inline bool empty() const noexcept { return !_size; }
+
+  //! Returns the size of the data.
+  inline size_t size() const noexcept { return _size; }
+  //! Returns the capacity of the data.
+  inline size_t capacity() const noexcept { return _capacity; }
+
+  //! Returns the pointer to the data the buffer references.
+  inline uint8_t* data() noexcept { return _data; }
+  //! \overload
+  inline const uint8_t* data() const noexcept { return _data; }
+
+  //! \}
+
+  //! \name Iterators
+  //! \{
+
+  inline uint8_t* begin() noexcept { return _data; }
+  inline const uint8_t* begin() const noexcept { return _data; }
+
+  inline uint8_t* end() noexcept { return _data + _size; }
+  inline const uint8_t* end() const noexcept { return _data + _size; }
+
+  //! \}
+};
+
+//! \}
+
+ASMJIT_END_NAMESPACE
+
+#endif // ASMJIT_CORE_CODEBUFFER_H_INCLUDED
+