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