private static void BuildPart(string input, Span <char> output, ref int currentPosition)
{
var productLength = input?.Length ?? 0;
// check if empty string, if so, unknown
if (productLength == 0 || MemoryExtensions.IsWhiteSpace(input))
{
UnknownPart.CopyTo(output.Slice(currentPosition));
currentPosition += UnknownPart.Length;
}
else
{
// check valid
var isValid = true;
foreach (var c in input)
{
if (!char.IsLetterOrDigit(c) && c != ' ')
{
isValid = false;
break;
}
}
if (!isValid) // not valid
{
InvalidPart.CopyTo(output.Slice(currentPosition));
currentPosition += InvalidPart.Length;
}
else
{
// if valid, lowercase
MemoryExtensions.ToLowerInvariant(input, output.Slice(currentPosition));
currentPosition += productLength;
}
}
output[currentPosition++] = JoinChar;
}
public static string GenerateSafeObjectKey(EventContext eventContext)
{
var length = CalculateLength(eventContext);
var objectKeySpan = length <= MaxStackAllocationSize
? stackalloc char[length]
: new char[length]; // this allocations. If we actually expected this to
// ever be the case using the ArrayPool would be more efficient.
var currentPosition = 0;
BuildPart(eventContext.Product, objectKeySpan, ref currentPosition);
BuildPart(eventContext.SiteKey, objectKeySpan, ref currentPosition);
BuildPart(eventContext.EventName, objectKeySpan, ref currentPosition);
RemoveSpaces(objectKeySpan, ref currentPosition);
if (eventContext.EventDateUtc != default)
{
eventContext.EventDateUtc.TryFormat(objectKeySpan.Slice(currentPosition),
out var bytesWritten, DateFormat, CultureInfo.InvariantCulture);
currentPosition += bytesWritten;
}
MemoryExtensions.ToLowerInvariant(eventContext.MessageId,
objectKeySpan.Slice(currentPosition));
currentPosition += eventContext.MessageId.Length;
JsonSuffix.CopyTo(objectKeySpan.Slice(currentPosition)); // copy suffix
var key = objectKeySpan.ToString(); // allocate the final string
return(key);
}
public static IEnumerable <object[]> MemoryExtensionsToUpperLowerOverlapping()
{
// full overlap, overlap in the middle, overlap at start, overlap at the end
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToLower(buffer, null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToLower(buffer.Slice(1, 1), null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToLower(buffer.Slice(0, 1), null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToLower(buffer.Slice(2, 1), null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToLower(buffer, buffer, null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToLower(buffer, buffer.Slice(1, 1), null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToLower(buffer, buffer.Slice(0, 1), null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToLower(buffer, buffer.Slice(2, 1), null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToLowerInvariant(buffer) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToLowerInvariant(buffer.Slice(1, 1)) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToLowerInvariant(buffer.Slice(0, 1)) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToLowerInvariant(buffer.Slice(2, 1)) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToLowerInvariant(buffer, buffer) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToLowerInvariant(buffer, buffer.Slice(1, 1)) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToLowerInvariant(buffer, buffer.Slice(0, 1)) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToLowerInvariant(buffer, buffer.Slice(2, 1)) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToUpper(buffer, null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToUpper(buffer.Slice(1, 1), null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToUpper(buffer.Slice(0, 1), null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToUpper(buffer.Slice(2, 1), null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToUpper(buffer, buffer, null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToUpper(buffer, buffer.Slice(1, 1), null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToUpper(buffer, buffer.Slice(0, 1), null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToUpper(buffer, buffer.Slice(2, 1), null) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToUpperInvariant(buffer) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToUpperInvariant(buffer.Slice(1, 1)) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToUpperInvariant(buffer.Slice(0, 1)) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => ((ReadOnlySpan <char>)buffer).ToUpperInvariant(buffer.Slice(2, 1)) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToUpperInvariant(buffer, buffer) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToUpperInvariant(buffer, buffer.Slice(1, 1)) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToUpperInvariant(buffer, buffer.Slice(0, 1)) });
yield return(new TestHelpers.AssertThrowsAction <char>[] { (Span <char> buffer) => MemoryExtensions.ToUpperInvariant(buffer, buffer.Slice(2, 1)) });
}
