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00019 #ifndef CLEARTEST_H
00020 #define CLEARTEST_H
00021
00022 #include <cppunit/TestFixture.h>
00023
00024 using namespace bit;
00025
00026 class ClearTest : public CppUnit::TestFixture {
00027 public:
00028
00029 CPPUNIT_TEST_SUITE( ClearTest );
00030 CPPUNIT_TEST( bits_28_and_29 );
00031 CPPUNIT_TEST( middle_octets );
00032 CPPUNIT_TEST( lead_bits );
00033 CPPUNIT_TEST( trailing_bits );
00034 CPPUNIT_TEST( spanning_octets );
00035 CPPUNIT_TEST_SUITE_END();
00036
00037 public:
00038 void setUp() { }
00039
00040 void tearDown() { }
00041
00042 void bits_28_and_29() { CPPUNIT_ASSERT( 0xfffffff3 == clear_bits( 0xffffffff, 28, 2) ); }
00043 void middle_octets() { CPPUNIT_ASSERT( 0xff0000ff == clear_bits( 0xffffffff, 8, 16) ); }
00044 void lead_bits() { CPPUNIT_ASSERT( 0xff0fffff == clear_bits( 0xffffffff, 8, 4) ); }
00045 void trailing_bits() { CPPUNIT_ASSERT( 0xfff0ffff == clear_bits( 0xffffffff, 12, 4) ); }
00046 void spanning_octets() { CPPUNIT_ASSERT( 0xf000000f == clear_bits( 0xffffffff, 4, 24) ); }
00047
00048 uint32_t clear_bits(uint32_t value, size_t offset, size_t bits) {
00049 Buffer b;
00050 value = host_to_be(value);
00051 b.set_data(&value, sizeof(value));
00052 b.clear_bits(offset, bits);
00053 value = *((uint32_t*)b.data());
00054 value = be_to_host(value);
00055 return value;
00056 }
00057 };
00058
00059 #endif