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path: root/contrib/restricted/libffi/testsuite/libffi.call/offsets.c
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/* Area:		Struct layout 
   Purpose:		Test ffi_get_struct_offsets 
   Limitations:		none. 
   PR:			none. 
   Originator: 		Tom Tromey. */ 
 
/* { dg-do run } */ 
#include "ffitest.h" 
#include <stddef.h> 
 
struct test_1 
{ 
  char c; 
  float f; 
  char c2; 
  int i; 
}; 
 
int 
main (void) 
{ 
  ffi_type test_1_type; 
  ffi_type *test_1_elements[5]; 
  size_t test_1_offsets[4]; 
 
  test_1_elements[0] = &ffi_type_schar; 
  test_1_elements[1] = &ffi_type_float; 
  test_1_elements[2] = &ffi_type_schar; 
  test_1_elements[3] = &ffi_type_sint; 
  test_1_elements[4] = NULL; 
 
  test_1_type.size = 0; 
  test_1_type.alignment = 0; 
  test_1_type.type = FFI_TYPE_STRUCT; 
  test_1_type.elements = test_1_elements; 
 
  CHECK (ffi_get_struct_offsets (FFI_DEFAULT_ABI, &test_1_type, test_1_offsets) 
	 == FFI_OK); 
  CHECK (test_1_type.size == sizeof (struct test_1)); 
  CHECK (offsetof (struct test_1, c) == test_1_offsets[0]); 
  CHECK (offsetof (struct test_1, f) == test_1_offsets[1]); 
  CHECK (offsetof (struct test_1, c2) == test_1_offsets[2]); 
  CHECK (offsetof (struct test_1, i) == test_1_offsets[3]); 
 
  return 0; 
}