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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package cgotest
/*
#include <stdint.h>
typedef struct {
char x;
long y;
} __attribute__((__packed__)) misaligned;
int
offset7560(void)
{
return (uintptr_t)&((misaligned*)0)->y;
}
*/
import "C"
import (
"reflect"
"testing"
)
func test7560(t *testing.T) {
// some mingw don't implement __packed__ correctly.
if C.offset7560() != 1 {
t.Skip("C compiler did not pack struct")
}
// C.misaligned should have x but then a padding field to get to the end of the struct.
// There should not be a field named 'y'.
var v C.misaligned
rt := reflect.TypeOf(&v).Elem()
if rt.NumField() != 2 || rt.Field(0).Name != "x" || rt.Field(1).Name != "_" {
t.Errorf("unexpected fields in C.misaligned:\n")
for i := 0; i < rt.NumField(); i++ {
t.Logf("%+v\n", rt.Field(i))
}
}
}
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