ref: 3264efeca8c41b909a8fca2c57785f936fb55f80
dir: /tests/libc/execute/0010-stddef.c/
#include <assert.h> #include <stddef.h> #include <stdio.h> /* output: NULL = 0 end: */ typedef struct test Test; struct test { int a, b, c; char d; } test = { .a = 1, .b = 2, .c = 3, .d = 4, }; int main() { wchar_t wc = L'c'; char *q, *p = (char *) &test; printf("NULL = %p\n", NULL); p += offsetof(Test, d); assert(sizeof(size_t) == sizeof(ptrdiff_t)); assert(wc == L'c'); assert(*p == 4); assert(offsetof(Test, d) > offsetof(Test, a)); assert(offsetof(Test, d) > offsetof(Test, b)); assert(offsetof(Test, d) > offsetof(Test, c)); assert(sizeof(sizeof(int)) == sizeof(size_t)); assert(sizeof(p - q) == sizeof(ptrdiff_t)); return 0; }