public Result GetKeyValueSize(out int keySize, out int valueSize)
{
Unsafe.SkipInit(out keySize);
Unsafe.SkipInit(out valueSize);
// This should only be called after ReadEntryCount.
Assert.NotEqual(_offset, 0);
// Peek the next entry header.
KeyValueArchiveEntryHeader header = default;
Result rc = Peek(SpanHelpers.AsByteSpan(ref header));
if (rc.IsFailure())
{
return(rc);
}
if (!header.IsValid())
{
return(ResultKvdb.InvalidKeyValue.Log());
}
keySize = header.KeySize;
valueSize = header.ValueSize;
return(Result.Success);
}
public void WriteEntry(ReadOnlySpan <byte> key, ReadOnlySpan <byte> value)
{
// This should only be called after writing header.
Assert.SdkNotEqual(_offset, 0);
var header = new KeyValueArchiveEntryHeader(key.Length, value.Length);
Write(SpanHelpers.AsByteSpan(ref header));
Write(key);
Write(value);
}
public Result ReadKeyValue(Span <byte> keyBuffer, Span <byte> valueBuffer)
{
// This should only be called after ReadEntryCount.
Assert.NotEqual(_offset, 0);
// Read the next entry header.
KeyValueArchiveEntryHeader header = default;
Result rc = Read(SpanHelpers.AsByteSpan(ref header));
if (rc.IsFailure())
{
return(rc);
}
if (!header.IsValid())
{
return(ResultKvdb.InvalidKeyValue.Log());
}
// Key size and Value size must be correct.
Assert.Equal(keyBuffer.Length, header.KeySize);
Assert.Equal(valueBuffer.Length, header.ValueSize);
rc = Read(keyBuffer);
if (rc.IsFailure())
{
return(rc);
}
rc = Read(valueBuffer);
if (rc.IsFailure())
{
return(rc);
}
return(Result.Success);
}