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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using Internal.NativeFormat;
using System.Diagnostics;
using System.Text;
namespace Internal.Runtime
{
internal sealed unsafe partial class EETypeOptionalFieldsBuilder
{
private NativePrimitiveEncoder _encoder;
private OptionalField[] _rgFields = new OptionalField[(int)EETypeOptionalFieldTag.Count];
private struct OptionalField
{
internal bool _fieldPresent;
internal uint _value;
}
internal EETypeOptionalFieldsBuilder() { }
internal uint GetFieldValue(EETypeOptionalFieldTag eTag, uint defaultValueIfNotFound)
{
return _rgFields[(int)eTag]._fieldPresent ? _rgFields[(int)eTag]._value : defaultValueIfNotFound;
}
internal void SetFieldValue(EETypeOptionalFieldTag eTag, uint value)
{
_rgFields[(int)eTag]._fieldPresent = true;
_rgFields[(int)eTag]._value = value;
}
internal void ClearField(EETypeOptionalFieldTag eTag)
{
_rgFields[(int)eTag]._fieldPresent = false;
}
private int Encode()
{
EETypeOptionalFieldTag eLastTag = EETypeOptionalFieldTag.Count;
for (EETypeOptionalFieldTag eTag = 0; eTag < EETypeOptionalFieldTag.Count; eTag++)
eLastTag = _rgFields[(int)eTag]._fieldPresent ? eTag : eLastTag;
if (eLastTag == EETypeOptionalFieldTag.Count)
return 0;
_encoder = default(NativePrimitiveEncoder);
_encoder.Init();
for (EETypeOptionalFieldTag eTag = 0; eTag < EETypeOptionalFieldTag.Count; eTag++)
{
if (!_rgFields[(int)eTag]._fieldPresent)
continue;
_encoder.WriteByte((byte)((byte)eTag | (eTag == eLastTag ? 0x80 : 0)));
_encoder.WriteUnsigned(_rgFields[(int)eTag]._value);
}
return _encoder.Size;
}
public byte[] GetBytes()
{
Debug.Assert(IsAtLeastOneFieldUsed());
if (_encoder.Size == 0)
{
Encode();
}
return _encoder.GetBytes();
}
public bool IsAtLeastOneFieldUsed()
{
for (int i = 0; i < (int)EETypeOptionalFieldTag.Count; i++)
{
if (_rgFields[i]._fieldPresent)
return true;
}
return false;
}
public override string ToString()
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < (int)EETypeOptionalFieldTag.Count; i++)
{
if (_rgFields[i]._fieldPresent)
{
sb.Append(_rgFields[i]._value.ToStringInvariant());
}
else
{
sb.Append('x');
}
if (i != (int)EETypeOptionalFieldTag.Count - 1)
{
sb.Append('_');
}
}
return sb.ToString();
}
public override bool Equals(object obj)
{
if (obj == null)
return false;
if (!(obj is EETypeOptionalFieldsBuilder))
return false;
EETypeOptionalFieldsBuilder other = obj as EETypeOptionalFieldsBuilder;
if (ReferenceEquals(this, other))
return true;
for (EETypeOptionalFieldTag eTag = 0; eTag < EETypeOptionalFieldTag.Count; eTag++)
{
int index = (int)eTag;
if (_rgFields[index]._fieldPresent != other._rgFields[index]._fieldPresent ||
(_rgFields[index]._fieldPresent && _rgFields[index]._value != other._rgFields[index]._value))
return false;
}
return true;
}
public override int GetHashCode()
{
int hash = 31;
for (EETypeOptionalFieldTag eTag = 0; eTag < EETypeOptionalFieldTag.Count; eTag++)
{
hash = hash * 486187739 + (int)GetFieldValue(eTag, 0);
}
return hash;
}
}
}
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