public void EncodingOutputTooSmall()
{
Span <byte> source = new byte[750];
Base64TestHelper.InitalizeBytes(source);
int outputSize = 320;
int requiredSize = Base64.ComputeEncodedLength(source.Length);
Span <byte> encodedBytes = new byte[outputSize];
Assert.Equal(TransformationStatus.DestinationTooSmall,
Base64.Encoder.Transform(source, encodedBytes, out int consumed, out int written));
Assert.Equal(encodedBytes.Length, written);
Assert.Equal(encodedBytes.Length / 4 * 3, consumed);
encodedBytes = new byte[requiredSize - outputSize];
Assert.Equal(TransformationStatus.Done,
Base64.Encoder.Transform(source.Slice(consumed), encodedBytes, out consumed, out written));
Assert.Equal(encodedBytes.Length, written);
Assert.Equal(encodedBytes.Length / 4 * 3, consumed);
string encodedText = Text.Encoding.ASCII.GetString(encodedBytes.ToArray());
string expectedText = Convert.ToBase64String(source.ToArray()).Substring(outputSize);
Assert.Equal(expectedText, encodedText);
}
private static void Base64DecodeBaseline(int numberOfBytes)
{
var source = new byte[numberOfBytes];
Base64TestHelper.InitalizeBytes(source.AsSpan());
char[] encoded = Convert.ToBase64String(source).ToCharArray();
foreach (var iteration in Benchmark.Iterations)
{
using (iteration.StartMeasurement()) {
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
{
Convert.FromBase64CharArray(encoded, 0, encoded.Length);
}
}
}
}
private static void Base64EncodeBaseline(int numberOfBytes)
{
var source = new byte[numberOfBytes];
Base64TestHelper.InitalizeBytes(source.AsSpan());
var destination = new char[Base64.ComputeEncodedLength(numberOfBytes)];
foreach (var iteration in Benchmark.Iterations)
{
using (iteration.StartMeasurement()) {
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
{
Convert.ToBase64CharArray(source, 0, source.Length, destination, 0);
}
}
}
}
private static void Base64Encode(int numberOfBytes)
{
Span <byte> source = new byte[numberOfBytes];
Base64TestHelper.InitalizeBytes(source);
Span <byte> destination = new byte[Base64.ComputeEncodedLength(numberOfBytes)];
foreach (var iteration in Benchmark.Iterations)
{
using (iteration.StartMeasurement()) {
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
{
Base64.Encoder.Transform(source, destination, out int consumed, out int written);
}
}
}
}
private static void Base64Decode(int numberOfBytes)
{
Span <byte> source = new byte[numberOfBytes];
Base64TestHelper.InitalizeBytes(source);
Span <byte> encoded = new byte[Base64.BytesToUtf8Length(numberOfBytes)];
Base64.BytesToUtf8(source, encoded, out int consumed, out int written);
foreach (var iteration in Benchmark.Iterations)
{
using (iteration.StartMeasurement()) {
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
{
Base64.Utf8ToBytes(encoded, source, out int bytesConsumed, out int bytesWritten);
}
}
}
}
public void BasicEncoding()
{
var rnd = new Random(42);
for (int i = 0; i < 10; i++)
{
int numBytes = rnd.Next(100, 1000 * 1000);
Span <byte> source = new byte[numBytes];
Base64TestHelper.InitalizeBytes(source, numBytes);
Span <byte> encodedBytes = new byte[Base64.ComputeEncodedLength(source.Length)];
Assert.Equal(TransformationStatus.Done, Base64.Encoder.Transform(source, encodedBytes, out int consumed, out int encodedBytesCount));
Assert.Equal(encodedBytes.Length, encodedBytesCount);
string encodedText = Text.Encoding.ASCII.GetString(encodedBytes.ToArray());
string expectedText = Convert.ToBase64String(source.ToArray());
Assert.Equal(expectedText, encodedText);
}
}
private static void Base64DecodeInPlace(int numberOfBytes)
{
Span <byte> source = new byte[numberOfBytes];
Base64TestHelper.InitalizeBytes(source);
int length = Base64.ComputeEncodedLength(numberOfBytes);
foreach (var iteration in Benchmark.Iterations)
{
using (iteration.StartMeasurement())
{
for (int i = 0; i < Benchmark.InnerIterationCount; i++)
{
Span <byte> encodedSpan = new byte[length];
Base64.Encoder.Transform(source, encodedSpan, out int consumed, out int written);
Base64.DecodeInPlace(encodedSpan, out int bytesConsumed, out int bytesWritten);
}
}
}
}