From e3e6d0bb7bd91ea8630813df475a4e1434dad334 Mon Sep 17 00:00:00 2001
From: Wolfgang Hottgenroth <wolfgang.hottgenroth@icloud.com>
Date: Sun, 13 Dec 2020 23:04:23 +0100
Subject: [PATCH] uint32_t in offset test

---
 offsetTest/test.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/offsetTest/test.c b/offsetTest/test.c
index 4e6ce27..344eac3 100644
--- a/offsetTest/test.c
+++ b/offsetTest/test.c
@@ -8,18 +8,20 @@ typedef struct {
   uint8_t id;
   char a[16];
   uint8_t length;
+  uint32_t x;
 } t_testObj;
   
-t_testObj testObj = { .id = 0, .a = "test123", .length = 25 };
+t_testObj testObj = { .id = 0, .a = "test123", .length = 25, .x = 123456 };
 
 void printTestObj(t_testObj *testObj) {
-  printf("testObj: id=%d, a=%s, length=%d\n", testObj->id, testObj->a, testObj->length);
+  printf("testObj: id=%d, a=%s, length=%d, x=%d\n", testObj->id, testObj->a, testObj->length, testObj->x);
 }
 
 int main() {
   printf("id:     %ld\n", offsetof(t_testObj, id));
   printf("a:      %ld\n", offsetof(t_testObj, a));
   printf("length: %ld\n", offsetof(t_testObj, length));
+  printf("x:      %ld\n", offsetof(t_testObj, x));
 
   printTestObj(&testObj);
 
@@ -40,6 +42,12 @@ int main() {
 
   strcpy((char*)a3, "Wolfgang");
   printTestObj(&testObj);
+
+  uint32_t *a4 = (uint32_t*) (((uint8_t*)&testObj) + offsetof(t_testObj, x));
+  printf("a4: %p\n", a4);
+
+  *a4 = 1234567890;
+  printTestObj(&testObj);
 }