public void EqualsOrdinal_ComparingVariousInputsBothWays_ReturnsExpected(string leftString, string rightString, bool expected)
{
char[] left = leftString.ToCharArray();
char[] right = rightString.ToCharArray();
Assert.Equal(expected, CharArrayHelpers.EqualsOrdinal(leftString, right, 0, right.Length));
Assert.Equal(expected, CharArrayHelpers.EqualsOrdinal(rightString, left, 0, left.Length));
}
/// <summary>
/// Gets a known header name string from a matching char[] array segment, using an ordinal comparison.
/// Used to avoid allocating new strings for known header names.
/// </summary>
public static bool TryGetHeaderName(char[] array, int startIndex, int length, out string name)
{
CharArrayHelpers.DebugAssertArrayInputs(array, startIndex, length);
return(TryGetHeaderName(
array, startIndex, length,
(arr, index) => arr[index],
(known, arr, start, len) => CharArrayHelpers.EqualsOrdinal(known, arr, start, len),
out name));
}
private static string GetReasonPhrase(HttpStatusCode statusCode, char[] buffer, int bufferLength)
{
CharArrayHelpers.DebugAssertArrayInputs(buffer, 0, bufferLength);
Debug.Assert(bufferLength > 0);
// If it's a known reason phrase, use the known reason phrase instead of allocating a new string.
string knownReasonPhrase = HttpStatusDescription.Get(statusCode);
return((knownReasonPhrase != null && CharArrayHelpers.EqualsOrdinal(knownReasonPhrase, buffer, 0, bufferLength)) ?
knownReasonPhrase :
new string(buffer, 0, bufferLength));
}
/// <summary>
/// Returns true if <paramref name="known"/> matches the <paramref name="key"/> char[] array segment,
/// using an ordinal comparison.
/// </summary>
private static bool TryMatch(string known, char[] key, int startIndex, int length, out string name)
{
Debug.Assert(known != null);
Debug.Assert(known.Length > 0);
CharArrayHelpers.DebugAssertArrayInputs(key, startIndex, length);
// The lengths should be equal because this method is only called
// from within a "switch (length) { ... }".
Debug.Assert(known.Length == length);
if (CharArrayHelpers.EqualsOrdinal(known, key, startIndex, length))
{
name = known;
return(true);
}
name = null;
return(false);
}
