public static ComparisonExample[] GetComparisonExamples2()
{
ComparisonExample[] result = new ComparisonExample[examples.Length];
Array.Copy(examples, result, examples.Length);
for (int i = 0; i < result.Length; i++)
{
int ha = ("a" + i).GetHashCode();
double a = ha * Math.Pow(0.75, ha % 100);
int hb = ("b" + i).GetHashCode();
double b = hb * Math.Pow(0.75, hb % 100);
result[i] = new ComparisonExample(BitConverter.DoubleToInt64Bits(a), BitConverter.DoubleToInt64Bits(b), a > b ? 1 : (a == b) ? 0 : -1);
}
return(result);
}
public void TestRoundTripOnComparisonExamples()
{
ComparisonExample[] examples = NumberComparisonExamples.GetComparisonExamples();
bool success = true;
for (int i = 0; i < examples.Length; i++)
{
ComparisonExample ce = examples[i];
success &= ConfirmRoundTrip(i, ce.GetA());
success &= ConfirmRoundTrip(i, ce.GetNegA());
success &= ConfirmRoundTrip(i, ce.GetB());
success &= ConfirmRoundTrip(i, ce.GetNegB());
}
if (!success)
{
throw new AssertionException("One or more cases failed. See stderr");
}
}
public static void Main(String[] args)
{
IWorkbook wb = new HSSFWorkbook();
SheetWriter sw = new SheetWriter(wb);
ComparisonExample[] ces = NumberComparisonExamples.GetComparisonExamples();
for (int i = 0; i < ces.Length; i++)
{
ComparisonExample ce = ces[i];
sw.AddTestRow(ce.GetA(), ce.GetB(), ce.GetExpectedResult());
}
FileInfo outputFile = new FileInfo("ExcelNumberCompare.xls");
FileStream os = File.OpenWrite(outputFile.FullName);
wb.Write(os);
os.Close();
Console.WriteLine("Finished writing '" + outputFile.FullName + "'");
}
private static ComparisonExample[] InitExamples()
{
List<ComparisonExample> temp = new List<ComparisonExample>();
AddStepTransition(temp, 0x4010000000000005L);
AddStepTransition(temp, 0x4010000000000010L);
AddStepTransition(temp, 0x401000000000001CL);
AddStepTransition(temp, 0x403CE0FFFFFFFFF1L);
AddStepTransition(temp, 0x5010000000000006L);
AddStepTransition(temp, 0x5010000000000010L);
AddStepTransition(temp, 0x501000000000001AL);
AddStepTransition(temp, 0x544CE6345CF32018L);
AddStepTransition(temp, 0x544CE6345CF3205AL);
AddStepTransition(temp, 0x544CE6345CF3209CL);
AddStepTransition(temp, 0x544CE6345CF320DEL);
AddStepTransition(temp, 0x54B250001000101DL);
AddStepTransition(temp, 0x54B2500010001050L);
AddStepTransition(temp, 0x54B2500010001083L);
AddStepTransition(temp, 0x6230100010001000L);
AddStepTransition(temp, 0x6230100010001005L);
AddStepTransition(temp, 0x623010001000100AL);
AddStepTransition(temp, 0x7F50300020001011L);
AddStepTransition(temp, 0x7F5030002000102BL);
AddStepTransition(temp, 0x7F50300020001044L);
AddStepTransition(temp, 0x2B2BFFFF1000102AL);
AddStepTransition(temp, 0x2B2BFFFF10001079L);
AddStepTransition(temp, 0x2B2BFFFF100010C8L);
AddStepTransition(temp, 0x2B2BFF001000102DL);
AddStepTransition(temp, 0x2B2BFF0010001035L);
AddStepTransition(temp, 0x2B2BFF001000103DL);
AddStepTransition(temp, 0x2B61800040002024L);
AddStepTransition(temp, 0x2B61800040002055L);
AddStepTransition(temp, 0x2B61800040002086L);
AddStepTransition(temp, 0x008000000000000BL);
// just outside 'subnormal' range
AddStepTransition(temp, 0x0010000000000007L);
AddStepTransition(temp, 0x001000000000001BL);
AddStepTransition(temp, 0x001000000000002FL);
foreach (ComparisonExample ce1 in new ComparisonExample[] {
// negative, and exponents differ by more than 1
ce(unchecked((long)0xBF30000000000000L), unchecked((long)0xBE60000000000000L), -1),
// negative zero *is* less than positive zero, but not easy to Get out of calculations
ce(unchecked((long)0x0000000000000000L), unchecked((long)0x8000000000000000L), +1),
// subnormal numbers compare without rounding for some reason
ce(0x0000000000000000L, 0x0000000000000001L, -1),
ce(0x0008000000000000L, 0x0008000000000001L, -1),
ce(0x000FFFFFFFFFFFFFL, 0x000FFFFFFFFFFFFEL, +1),
ce(0x000FFFFFFFFFFFFBL, 0x000FFFFFFFFFFFFCL, -1),
ce(0x000FFFFFFFFFFFFBL, 0x000FFFFFFFFFFFFEL, -1),
// across subnormal threshold (some mistakes when close)
ce(0x000FFFFFFFFFFFFFL, 0x0010000000000000L, +1),
ce(0x000FFFFFFFFFFFFBL, 0x0010000000000007L, +1),
ce(0x000FFFFFFFFFFFFAL, 0x0010000000000007L, 0),
// when a bit further apart - normal results
ce(0x000FFFFFFFFFFFF9L, 0x0010000000000007L, -1),
ce(0x000FFFFFFFFFFFFAL, 0x0010000000000008L, -1),
ce(0x000FFFFFFFFFFFFBL, 0x0010000000000008L, -1),
})
{
temp.Add(ce1);
}
ComparisonExample[] result = new ComparisonExample[temp.Count];
temp.CopyTo(result);
return result;
}
public static ComparisonExample[] GetComparisonExamples2()
{
ComparisonExample[] result = new ComparisonExample[examples.Length];
Array.Copy(examples, result, examples.Length);
for (int i = 0; i < result.Length; i++)
{
int ha = ("a" + i).GetHashCode();
double a = ha * Math.Pow(0.75, ha % 100);
int hb = ("b" + i).GetHashCode();
double b = hb * Math.Pow(0.75, hb % 100);
result[i] = new ComparisonExample(BitConverter.DoubleToInt64Bits(a), BitConverter.DoubleToInt64Bits(b), a > b ? 1 : (a == b) ? 0 : -1);
}
return result;
}
public static ComparisonExample[] GetComparisonExamples()
{
ComparisonExample[] result = new ComparisonExample[examples.Length];
Array.Copy(examples, result, examples.Length);
return result;
}
private static ComparisonExample[] InitExamples()
{
List <ComparisonExample> temp = new List <ComparisonExample>();
AddStepTransition(temp, 0x4010000000000005L);
AddStepTransition(temp, 0x4010000000000010L);
AddStepTransition(temp, 0x401000000000001CL);
AddStepTransition(temp, 0x403CE0FFFFFFFFF1L);
AddStepTransition(temp, 0x5010000000000006L);
AddStepTransition(temp, 0x5010000000000010L);
AddStepTransition(temp, 0x501000000000001AL);
AddStepTransition(temp, 0x544CE6345CF32018L);
AddStepTransition(temp, 0x544CE6345CF3205AL);
AddStepTransition(temp, 0x544CE6345CF3209CL);
AddStepTransition(temp, 0x544CE6345CF320DEL);
AddStepTransition(temp, 0x54B250001000101DL);
AddStepTransition(temp, 0x54B2500010001050L);
AddStepTransition(temp, 0x54B2500010001083L);
AddStepTransition(temp, 0x6230100010001000L);
AddStepTransition(temp, 0x6230100010001005L);
AddStepTransition(temp, 0x623010001000100AL);
AddStepTransition(temp, 0x7F50300020001011L);
AddStepTransition(temp, 0x7F5030002000102BL);
AddStepTransition(temp, 0x7F50300020001044L);
AddStepTransition(temp, 0x2B2BFFFF1000102AL);
AddStepTransition(temp, 0x2B2BFFFF10001079L);
AddStepTransition(temp, 0x2B2BFFFF100010C8L);
AddStepTransition(temp, 0x2B2BFF001000102DL);
AddStepTransition(temp, 0x2B2BFF0010001035L);
AddStepTransition(temp, 0x2B2BFF001000103DL);
AddStepTransition(temp, 0x2B61800040002024L);
AddStepTransition(temp, 0x2B61800040002055L);
AddStepTransition(temp, 0x2B61800040002086L);
AddStepTransition(temp, 0x008000000000000BL);
// just outside 'subnormal' range
AddStepTransition(temp, 0x0010000000000007L);
AddStepTransition(temp, 0x001000000000001BL);
AddStepTransition(temp, 0x001000000000002FL);
foreach (ComparisonExample ce1 in new ComparisonExample[] {
// negative, and exponents differ by more than 1
ce(unchecked ((long)0xBF30000000000000L), unchecked ((long)0xBE60000000000000L), -1),
// negative zero *is* less than positive zero, but not easy to Get out of calculations
ce(unchecked ((long)0x0000000000000000L), unchecked ((long)0x8000000000000000L), +1),
// subnormal numbers compare without rounding for some reason
ce(0x0000000000000000L, 0x0000000000000001L, -1),
ce(0x0008000000000000L, 0x0008000000000001L, -1),
ce(0x000FFFFFFFFFFFFFL, 0x000FFFFFFFFFFFFEL, +1),
ce(0x000FFFFFFFFFFFFBL, 0x000FFFFFFFFFFFFCL, -1),
ce(0x000FFFFFFFFFFFFBL, 0x000FFFFFFFFFFFFEL, -1),
// across subnormal threshold (some mistakes when close)
ce(0x000FFFFFFFFFFFFFL, 0x0010000000000000L, +1),
ce(0x000FFFFFFFFFFFFBL, 0x0010000000000007L, +1),
ce(0x000FFFFFFFFFFFFAL, 0x0010000000000007L, 0),
// when a bit further apart - normal results
ce(0x000FFFFFFFFFFFF9L, 0x0010000000000007L, -1),
ce(0x000FFFFFFFFFFFFAL, 0x0010000000000008L, -1),
ce(0x000FFFFFFFFFFFFBL, 0x0010000000000008L, -1),
})
{
temp.Add(ce1);
}
ComparisonExample[] result = new ComparisonExample[temp.Count];
temp.CopyTo(result);
return(result);
}
public static ComparisonExample[] GetComparisonExamples()
{
ComparisonExample[] result = new ComparisonExample[examples.Length];
Array.Copy(examples, result, examples.Length);
return(result);
}