cgen: add the __offsetof_ptr C macro
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5a231326d7
commit
144546543c
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@ -103,9 +103,14 @@ static inline void __sort_ptr(uintptr_t a[], bool b[], int l)
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#endif
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#endif
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// Use __offsetof_ptr instead of __offset_of, when you *do* have a valid pointer, to avoid UB:
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#ifndef __offsetof_ptr
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#define __offsetof_ptr(ptr,PTYPE,FIELDNAME) ((size_t)((byte *)&((PTYPE *)ptr)->FIELDNAME - (byte *)ptr))
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#endif
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// for __offset_of
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#ifndef __offsetof
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#define __offsetof(s,memb) ((size_t)((char *)&((s *)0)->memb - (char *)0))
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#define __offsetof(PTYPE,FIELDNAME) ((size_t)((char *)&((PTYPE *)0)->FIELDNAME - (char *)0))
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#endif
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#define OPTION_CAST(x) (x)
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