#include <exiv2/basicio.hpp>
#include "gtestwrapper.h"
using namespace Exiv2;
TEST(MemIo, seek_out_of_bounds_00)
{
byte buf[1024];
memset(buf, 0, sizeof(buf));
MemIo io(buf, sizeof(buf));
ASSERT_FALSE(io.eof());
// Regression test for bug reported in https://github.com/Exiv2/exiv2/pull/945
// The problem is that MemIo::seek() does not check that the new offset is
// in bounds.
byte tmp[16];
ASSERT_EQ(io.seek(0x10000000, BasicIo::beg), 1);
ASSERT_TRUE(io.eof());
// The seek was invalid, so the offset didn't change and this read still works.
const long sizeTmp = static_cast<long>(sizeof(sizeTmp));
ASSERT_EQ(io.read(tmp, sizeTmp), sizeTmp);
}
TEST(MemIo, seek_out_of_bounds_01)
{
byte buf[1024];
memset(buf, 0, sizeof(buf));
MemIo io(buf, sizeof(buf));
ASSERT_FALSE(io.eof());
byte tmp[16];
// Seek to the end of the file.
ASSERT_EQ(io.seek(0, BasicIo::end), 0);
ASSERT_EQ(io.read(tmp, sizeof(tmp)), 0);
// Try to seek past the end of the file.
ASSERT_EQ(io.seek(0x10000000, BasicIo::end), 1);
ASSERT_TRUE(io.eof());
ASSERT_EQ(io.read(tmp, sizeof(tmp)), 0);
}
TEST(MemIo, seek_out_of_bounds_02)
{
byte buf[1024];
memset(buf, 0, sizeof(buf));
MemIo io(buf, sizeof(buf));
ASSERT_FALSE(io.eof());
byte tmp[16];
// Try to seek past the end of the file.
ASSERT_EQ(io.seek(0x10000000, BasicIo::cur), 1);
ASSERT_TRUE(io.eof());
// The seek was invalid, so the offset didn't change and this read still works.
const long sizeTmp = static_cast<long>(sizeof(sizeTmp));
ASSERT_EQ(io.read(tmp, sizeTmp), sizeTmp);
}
TEST(MemIo, seek_out_of_bounds_03)
{
byte buf[1024];
memset(buf, 0, sizeof(buf));
MemIo io(buf, sizeof(buf));
ASSERT_FALSE(io.eof());
byte tmp[16];
// Try to seek past the beginning of the file.
ASSERT_EQ(io.seek(-0x10000000, BasicIo::cur), 1);
ASSERT_FALSE(io.eof());
// The seek was invalid, so the offset didn't change and this read still works.
const long sizeTmp = static_cast<long>(sizeof(sizeTmp));
ASSERT_EQ(io.read(tmp, sizeTmp), sizeTmp);
}