private unsafe void TestComparisons(string heapValue, int offset, string value, bool unicode = false)
{
byte[] heap;
fixed(byte *heapPtr = (heap = Encoding.UTF8.GetBytes(heapValue)))
{
var block = new MemoryBlock(heapPtr, heap.Length);
string heapSubstr = GetStringHeapValue(heapValue, offset);
// compare:
if (!unicode)
{
int actualCmp = block.CompareUtf8NullTerminatedStringWithAsciiString(offset, value);
int expectedCmp = StringComparer.Ordinal.Compare(heapSubstr, value);
Assert.Equal(Math.Sign(expectedCmp), Math.Sign(actualCmp));
}
// equals:
bool actualEq = block.Utf8NullTerminatedEquals(offset, value);
bool expectedEq = StringComparer.Ordinal.Equals(heapSubstr, value);
Assert.Equal(expectedEq, actualEq);
// starts with:
bool actualSW = block.Utf8NullTerminatedStartsWith(offset, value);
bool expectedSW = heapSubstr.StartsWith(value, StringComparison.Ordinal);
Assert.Equal(actualSW, expectedSW);
}
}
private unsafe void TestComparisons(string heapValue, int offset, string value, bool unicode = false, bool ignoreCase = false)
{
byte[] heap;
MetadataStringDecoder decoder = MetadataStringDecoder.DefaultUTF8;
fixed(byte *heapPtr = (heap = Encoding.UTF8.GetBytes(heapValue)))
{
var block = new MemoryBlock(heapPtr, heap.Length);
string heapSubstr = GetStringHeapValue(heapValue, offset);
// compare:
if (!unicode)
{
int actualCmp = block.CompareUtf8NullTerminatedStringWithAsciiString(offset, value);
int expectedCmp = StringComparer.Ordinal.Compare(heapSubstr, value);
Assert.Equal(Math.Sign(expectedCmp), Math.Sign(actualCmp));
}
if (!ignoreCase)
{
TestComparison(block, offset, value, heapSubstr, decoder, ignoreCase: true);
}
TestComparison(block, offset, value, heapSubstr, decoder, ignoreCase);
}
}
