2016-01-07 13:07:13 +01:00
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#pragma once
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#include <assert.h>
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#include <stddef.h>
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// Ensure structs are correct size & offsets
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2017-02-21 21:06:18 +01:00
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#if defined(static_assert)
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# define CHECK_SIZE(Type, Size) \
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static_assert(sizeof(Type) == Size, \
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#Type " must be " #Size " bytes")
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2016-01-07 13:07:13 +01:00
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2017-02-21 21:06:18 +01:00
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# define CHECK_OFFSET(Type, Offset, Field) \
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static_assert(offsetof(Type, Field) == Offset, \
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#Type "::" #Field " must be at offset " #Offset)
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#else
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# define CHECK_SIZE(Type, Size)
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# define CHECK_OFFSET(Type, Offset, Field)
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#endif
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2016-01-07 13:07:13 +01:00
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// Workaround weird macro concat ## behaviour
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#define PP_CAT(a, b) PP_CAT_I(a, b)
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#define PP_CAT_I(a, b) PP_CAT_II(~, a ## b)
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#define PP_CAT_II(p, res) res
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// Allow us to easily add UNKNOWN / PADDING bytes into our structs,
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// generates unique variable names using __COUNTER__
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#define UNKNOWN(Size) char PP_CAT(__unk, __COUNTER__) [Size]
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#define PADDING(Size) UNKNOWN(Size)
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// Just some placeholder defines
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#define UNKNOWN_ARG uint32_t
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#define UNKNOWN_ARGS void
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#define UNKNOWN_SIZE(x)
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