75ee2fc4e6
The bba approach seems widely used enough that it's reasonable for this to become part of common code. Signed-off-by: D. Shah <dave@ds0.me>
40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
// This is intended to be included inside arch.h only.
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template <typename T> struct RelPtr
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{
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int32_t offset;
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const T *get() const { return reinterpret_cast<const T *>(reinterpret_cast<const char *>(this) + offset); }
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const T &operator[](size_t index) const { return get()[index]; }
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const T &operator*() const { return *(get()); }
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const T *operator->() const { return get(); }
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RelPtr(const RelPtr &) = delete;
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RelPtr &operator=(const RelPtr &) = delete;
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};
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NPNR_PACKED_STRUCT(template <typename T> struct RelSlice {
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int32_t offset;
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uint32_t length;
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const T *get() const { return reinterpret_cast<const T *>(reinterpret_cast<const char *>(this) + offset); }
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const T &operator[](size_t index) const
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{
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NPNR_ASSERT(index < length);
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return get()[index];
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}
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const T *begin() const { return get(); }
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const T *end() const { return get() + length; }
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const size_t size() const { return length; }
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const T &operator*() const { return *(get()); }
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const T *operator->() const { return get(); }
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});
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