/
StructOffsetTest_Tests.cpp
86 lines (66 loc) · 1.63 KB
/
StructOffsetTest_Tests.cpp
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/*
* #%~
* The VDM to C Code Generator
* %%
* Copyright (C) 2015 - 2016 Overture
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/gpl-3.0.html>.
* #~%
*/
#include "gtest/gtest.h"
extern "C"
{
#include "Vdm.h"
#include "classes/A.h"
#include "classes/B.h"
#include "classes/C.h"
#include <stdio.h>
}
struct K
{
int a;
int b;
struct VTable* tbl;
};
static void calc1(void*)
{
}
struct VTable VTableArrayForK[] =
{
/*
Vtable entry virtual function sum.
*/
{ 0, 0, (VirtualFunctionPointer) calc1 },
};
//Obtain a struct field
#define GET_STRUCT_FIELD(tname,ptr,fieldtype,fieldname) (*( (fieldtype*) ( ((unsigned char*)ptr) + offsetof(struct tname, fieldname) ) ))
struct KK
{
int a;
int b;
struct VTable* tbl;
int c;
struct VTable* tbl2;
};
TEST(KK, offsetTest)
{
struct KK k =
{ 1, 2, VTableArrayForK, 999, VTableArrayForK };
struct KK* kp = &k;
int c = *((int*) (((unsigned char*) kp) + offsetof(struct KK, c)));
struct VTable* tbl2 = GET_STRUCT_FIELD(KK, kp, struct VTable*, tbl2);
EXPECT_EQ (1,kp->a);
EXPECT_EQ (kp->c,c);
}