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pull/7576/head
Jan Tattermusch 5 years ago
parent ee6b20afbe
commit d0e08f546d
2 changed files with 91 additions and 148 deletions
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  1. 60
      csharp/src/Google.Protobuf.Test/CodedOutputStreamTest.cs
  2. 179
      csharp/src/Google.Protobuf/CodedOutputStream.cs

60
csharp/src/Google.Protobuf.Test/CodedOutputStreamTest.cs
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@ -211,35 +211,35 @@ namespace Google.Protobuf
[Test]
public void EncodeZigZag32()
{
Assert.AreEqual(0u, CodedOutputStream.EncodeZigZag32(0));
Assert.AreEqual(1u, CodedOutputStream.EncodeZigZag32(-1));
Assert.AreEqual(2u, CodedOutputStream.EncodeZigZag32(1));
Assert.AreEqual(3u, CodedOutputStream.EncodeZigZag32(-2));
Assert.AreEqual(0x7FFFFFFEu, CodedOutputStream.EncodeZigZag32(0x3FFFFFFF));
Assert.AreEqual(0x7FFFFFFFu, CodedOutputStream.EncodeZigZag32(unchecked((int) 0xC0000000)));
Assert.AreEqual(0xFFFFFFFEu, CodedOutputStream.EncodeZigZag32(0x7FFFFFFF));
Assert.AreEqual(0xFFFFFFFFu, CodedOutputStream.EncodeZigZag32(unchecked((int) 0x80000000)));
Assert.AreEqual(0u, WritingPrimitives.EncodeZigZag32(0));
Assert.AreEqual(1u, WritingPrimitives.EncodeZigZag32(-1));
Assert.AreEqual(2u, WritingPrimitives.EncodeZigZag32(1));
Assert.AreEqual(3u, WritingPrimitives.EncodeZigZag32(-2));
Assert.AreEqual(0x7FFFFFFEu, WritingPrimitives.EncodeZigZag32(0x3FFFFFFF));
Assert.AreEqual(0x7FFFFFFFu, WritingPrimitives.EncodeZigZag32(unchecked((int) 0xC0000000)));
Assert.AreEqual(0xFFFFFFFEu, WritingPrimitives.EncodeZigZag32(0x7FFFFFFF));
Assert.AreEqual(0xFFFFFFFFu, WritingPrimitives.EncodeZigZag32(unchecked((int) 0x80000000)));
}
[Test]
public void EncodeZigZag64()
{
Assert.AreEqual(0u, CodedOutputStream.EncodeZigZag64(0));
Assert.AreEqual(1u, CodedOutputStream.EncodeZigZag64(-1));
Assert.AreEqual(2u, CodedOutputStream.EncodeZigZag64(1));
Assert.AreEqual(3u, CodedOutputStream.EncodeZigZag64(-2));
Assert.AreEqual(0u, WritingPrimitives.EncodeZigZag64(0));
Assert.AreEqual(1u, WritingPrimitives.EncodeZigZag64(-1));
Assert.AreEqual(2u, WritingPrimitives.EncodeZigZag64(1));
Assert.AreEqual(3u, WritingPrimitives.EncodeZigZag64(-2));
Assert.AreEqual(0x000000007FFFFFFEuL,
CodedOutputStream.EncodeZigZag64(unchecked((long) 0x000000003FFFFFFFUL)));
WritingPrimitives.EncodeZigZag64(unchecked((long) 0x000000003FFFFFFFUL)));
Assert.AreEqual(0x000000007FFFFFFFuL,
CodedOutputStream.EncodeZigZag64(unchecked((long) 0xFFFFFFFFC0000000UL)));
WritingPrimitives.EncodeZigZag64(unchecked((long) 0xFFFFFFFFC0000000UL)));
Assert.AreEqual(0x00000000FFFFFFFEuL,
CodedOutputStream.EncodeZigZag64(unchecked((long) 0x000000007FFFFFFFUL)));
WritingPrimitives.EncodeZigZag64(unchecked((long) 0x000000007FFFFFFFUL)));
Assert.AreEqual(0x00000000FFFFFFFFuL,
CodedOutputStream.EncodeZigZag64(unchecked((long) 0xFFFFFFFF80000000UL)));
WritingPrimitives.EncodeZigZag64(unchecked((long) 0xFFFFFFFF80000000UL)));
Assert.AreEqual(0xFFFFFFFFFFFFFFFEL,
CodedOutputStream.EncodeZigZag64(unchecked((long) 0x7FFFFFFFFFFFFFFFUL)));
WritingPrimitives.EncodeZigZag64(unchecked((long) 0x7FFFFFFFFFFFFFFFUL)));
Assert.AreEqual(0xFFFFFFFFFFFFFFFFL,
CodedOutputStream.EncodeZigZag64(unchecked((long) 0x8000000000000000UL)));
WritingPrimitives.EncodeZigZag64(unchecked((long) 0x8000000000000000UL)));
}
[Test]
@ -247,26 +247,26 @@ namespace Google.Protobuf
{
// Some easier-to-verify round-trip tests. The inputs (other than 0, 1, -1)
// were chosen semi-randomly via keyboard bashing.
Assert.AreEqual(0, ParsingPrimitives.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(0)));
Assert.AreEqual(1, ParsingPrimitives.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(1)));
Assert.AreEqual(-1, ParsingPrimitives.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(-1)));
Assert.AreEqual(14927, ParsingPrimitives.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(14927)));
Assert.AreEqual(-3612, ParsingPrimitives.DecodeZigZag32(CodedOutputStream.EncodeZigZag32(-3612)));
Assert.AreEqual(0, ParsingPrimitives.DecodeZigZag32(WritingPrimitives.EncodeZigZag32(0)));
Assert.AreEqual(1, ParsingPrimitives.DecodeZigZag32(WritingPrimitives.EncodeZigZag32(1)));
Assert.AreEqual(-1, ParsingPrimitives.DecodeZigZag32(WritingPrimitives.EncodeZigZag32(-1)));
Assert.AreEqual(14927, ParsingPrimitives.DecodeZigZag32(WritingPrimitives.EncodeZigZag32(14927)));
Assert.AreEqual(-3612, ParsingPrimitives.DecodeZigZag32(WritingPrimitives.EncodeZigZag32(-3612)));
}
[Test]
public void RoundTripZigZag64()
{
Assert.AreEqual(0, ParsingPrimitives.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(0)));
Assert.AreEqual(1, ParsingPrimitives.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(1)));
Assert.AreEqual(-1, ParsingPrimitives.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-1)));
Assert.AreEqual(14927, ParsingPrimitives.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(14927)));
Assert.AreEqual(-3612, ParsingPrimitives.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-3612)));
Assert.AreEqual(0, ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(0)));
Assert.AreEqual(1, ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(1)));
Assert.AreEqual(-1, ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(-1)));
Assert.AreEqual(14927, ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(14927)));
Assert.AreEqual(-3612, ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(-3612)));
Assert.AreEqual(856912304801416L,
ParsingPrimitives.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(856912304801416L)));
ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(856912304801416L)));
Assert.AreEqual(-75123905439571256L,
ParsingPrimitives.DecodeZigZag64(CodedOutputStream.EncodeZigZag64(-75123905439571256L)));
ParsingPrimitives.DecodeZigZag64(WritingPrimitives.EncodeZigZag64(-75123905439571256L)));
}
[Test]

179
csharp/src/Google.Protobuf/CodedOutputStream.cs
Unescape View File

@ -263,9 +263,19 @@ namespace Google.Protobuf
/// <param name="value">The value to write</param>
public void WriteMessage(IMessage value)
{
// TOOD: implement....
WriteLength(value.CalculateSize());
value.WriteTo(this);
// TODO(jtattermusch): if the message doesn't implement IBufferMessage (and thus does not provide the InternalWriteTo method),
// what we're doing here works fine, but could be more efficient.
// For now, this inefficiency is fine, considering this is only a backward-compatibility scenario (and regenerating the code fixes it).
var span = new Span<byte>(buffer);
WriteContext.Initialize(ref span, ref state, out WriteContext ctx);
try
{
WritingPrimitivesMessages.WriteMessage(ref ctx, value);
}
finally
{
ctx.CopyStateTo(this);
}
}
/// <summary>
@ -274,8 +284,16 @@ namespace Google.Protobuf
/// <param name="value">The value to write</param>
public void WriteGroup(IMessage value)
{
// TODO: implement...
value.WriteTo(this);
var span = new Span<byte>(buffer);
WriteContext.Initialize(ref span, ref state, out WriteContext ctx);
try
{
WritingPrimitivesMessages.WriteGroup(ref ctx, value);
}
finally
{
ctx.CopyStateTo(this);
}
}
/// <summary>
@ -448,123 +466,49 @@ namespace Google.Protobuf
}
#endregion
//#region Underlying writing primitives
///// <summary>
///// Writes a 32 bit value as a varint. The fast route is taken when
///// there's enough buffer space left to whizz through without checking
///// for each byte; otherwise, we resort to calling WriteRawByte each time.
///// </summary>
//internal void WriteRawVarint32(uint value)
//{
// // Optimize for the common case of a single byte value
// if (value < 128 && position < limit)
// {
// buffer[position++] = (byte)value;
// return;
// }
// while (value > 127 && position < limit)
// {
// buffer[position++] = (byte) ((value & 0x7F) | 0x80);
// value >>= 7;
// }
// while (value > 127)
// {
// WriteRawByte((byte) ((value & 0x7F) | 0x80));
// value >>= 7;
// }
// if (position < limit)
// {
// buffer[position++] = (byte) value;
// }
// else
// {
// WriteRawByte((byte) value);
// }
//}
//internal void WriteRawVarint64(ulong value)
//{
// while (value > 127 && position < limit)
// {
// buffer[position++] = (byte) ((value & 0x7F) | 0x80);
// value >>= 7;
// }
// while (value > 127)
// {
// WriteRawByte((byte) ((value & 0x7F) | 0x80));
// value >>= 7;
// }
// if (position < limit)
// {
// buffer[position++] = (byte) value;
// }
// else
// {
// WriteRawByte((byte) value);
// }
//}
#region Underlying writing primitives
/// <summary>
/// Writes a 32 bit value as a varint. The fast route is taken when
/// there's enough buffer space left to whizz through without checking
/// for each byte; otherwise, we resort to calling WriteRawByte each time.
/// </summary>
internal void WriteRawVarint32(uint value)
{
var span = new Span<byte>(buffer);
WritingPrimitives.WriteRawVarint32(ref span, ref state, value);
}
//internal void WriteRawLittleEndian32(uint value)
//{
// if (position + 4 > limit)
// {
// WriteRawByte((byte) value);
// WriteRawByte((byte) (value >> 8));
// WriteRawByte((byte) (value >> 16));
// WriteRawByte((byte) (value >> 24));
// }
// else
// {
// buffer[position++] = ((byte) value);
// buffer[position++] = ((byte) (value >> 8));
// buffer[position++] = ((byte) (value >> 16));
// buffer[position++] = ((byte) (value >> 24));
// }
//}
internal void WriteRawVarint64(ulong value)
{
var span = new Span<byte>(buffer);
WritingPrimitives.WriteRawVarint64(ref span, ref state, value);
}
//internal void WriteRawLittleEndian64(ulong value)
//{
// if (position + 8 > limit)
// {
// WriteRawByte((byte) value);
// WriteRawByte((byte) (value >> 8));
// WriteRawByte((byte) (value >> 16));
// WriteRawByte((byte) (value >> 24));
// WriteRawByte((byte) (value >> 32));
// WriteRawByte((byte) (value >> 40));
// WriteRawByte((byte) (value >> 48));
// WriteRawByte((byte) (value >> 56));
// }
// else
// {
// buffer[position++] = ((byte) value);
// buffer[position++] = ((byte) (value >> 8));
// buffer[position++] = ((byte) (value >> 16));
// buffer[position++] = ((byte) (value >> 24));
// buffer[position++] = ((byte) (value >> 32));
// buffer[position++] = ((byte) (value >> 40));
// buffer[position++] = ((byte) (value >> 48));
// buffer[position++] = ((byte) (value >> 56));
// }
//}
internal void WriteRawLittleEndian32(uint value)
{
var span = new Span<byte>(buffer);
WritingPrimitives.WriteRawLittleEndian32(ref span, ref state, value);
}
//internal void WriteRawByte(byte value)
//{
// if (position == limit)
// {
// RefreshBuffer();
// }
internal void WriteRawLittleEndian64(ulong value)
{
var span = new Span<byte>(buffer);
WritingPrimitives.WriteRawLittleEndian64(ref span, ref state, value);
}
// buffer[position++] = value;
//}
internal void WriteRawByte(byte value)
{
var span = new Span<byte>(buffer);
WritingPrimitives.WriteRawByte(ref span, ref state, value);
}
//internal void WriteRawByte(uint value)
//{
// WriteRawByte((byte) value);
//}
internal void WriteRawByte(uint value)
{
var span = new Span<byte>(buffer);
WritingPrimitives.WriteRawByte(ref span, ref state, value);
}
// TODO: get rid of this internal method
/// <summary>
/// Writes out an array of bytes.
/// </summary>
@ -573,7 +517,6 @@ namespace Google.Protobuf
WriteRawBytes(value, 0, value.Length);
}
// TODO: get rid of this internal method
/// <summary>
/// Writes out part of an array of bytes.
/// </summary>
@ -583,7 +526,7 @@ namespace Google.Protobuf
WritingPrimitives.WriteRawBytes(ref span, ref state, value, offset, length);
}
//#endregion
#endregion
///// <summary>
///// Encode a 32-bit value with ZigZag encoding.

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