Federico Di Pierro FedeDP

Senior Open Source Engineer at Sysdig & Core Maintainer of Falco 🦅 (CNCF Runtime Security)

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Sysdig
Limbiate, Italy
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FedeDP / go_like_interface.c

Last active December 18, 2020 07:53

Stupidly simple set of macros to mimic GO-like INTERFACE in C

	#include <stdio.h>
	#include <stddef.h>
	#include <string.h>

	/*
	* PROs:
	* * can have variables too as interface members
	*
	* CONs:
	* * INTERFACE type can be directly declared and used as a normal struct

FedeDP / struct_field_ptr_type.c

Last active July 17, 2018 12:16

Using these set of macros (GetPtr and GetSinglePtr) it is possible to refactor your struct and still having the correct types for pointers. Eg: it may happen that a uint32_t field is changed to uint8_t, but in some places it is still referred as uint32_t *tmp = myStruct->x, causing troubles.

	#include <stdio.h>
	#include <stddef.h>
	#include <stdint.h>
	#include <stdlib.h>
	#include <string.h>

	#define MyPtrTypeOf(TYPE, MEMBER) typeof(&((TYPE *)0)->MEMBER)
	#define GetPtr(t, i, MEMBER) \
	MyPtrTypeOf(typeof(*t), MEMBER) MEMBER = \
	(MyPtrTypeOf(typeof(t), MEMBER)) ((void )(t + i) + offsetof(typeof(*t), MEMBER))

FedeDP / struct_fields_iterate.c

Last active October 19, 2020 06:46

Iterate through struct members, taken from http://stackoverflow.com/questions/1784782/is-there-any-way-to-loop-through-a-struct-with-elements-of-different-types-in-c

	#include <stdio.h>
	#include <string.h>
	#include <time.h>
	#include <stdlib.h>

	#define X_FIELDS \
	X(char *, field1) \
	X(char *, field2) \
	X(char *, field3) \
	X(char *, field4) \