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Add macro M_CTYPE_FROM_FIELD like M_TYPE_FROM_FIELD

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but for const pointer.
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Patrick Pelissier committed 2018-02-17 19:19:09 +01:00
1 parent 3d5914f389
commit 29d181c113
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m-core.h
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@@ -1202,6 +1202,8 @@
#define M_TYPE_FROM_FIELD(type, ptr, field_type, field) \
((type *)(void*)( (char *)M_ASSIGN_CAST(field_type*, (ptr)) - offsetof(type, field) ))
#define M_CTYPE_FROM_FIELD(type, ptr, field_type, field) \
((const type *)(const void*)( (const char *)M_ASSIGN_CAST(const field_type*, (ptr)) - offsetof(const type, field) ))
/************************************************************/