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DebugDirectoryBuilder.EmbeddedPortablePdb.cs
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DebugDirectoryBuilder.EmbeddedPortablePdb.cs
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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.Collections.Generic;
using System.IO;
using System.Reflection.Metadata;
using System.IO.Compression;
namespace System.Reflection.PortableExecutable
{
public sealed partial class DebugDirectoryBuilder
{
/// <summary>
/// Adds Embedded Portable PDB entry.
/// </summary>
/// <param name="debugMetadata">Portable PDB metadata builder.</param>
/// <param name="portablePdbVersion">Version of Portable PDB format (e.g. 0x0100 for 1.0).</param>
/// <exception cref="ArgumentNullException"><paramref name="debugMetadata"/> is null.</exception>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="portablePdbVersion"/> is smaller than 0x0100.</exception>
public void AddEmbeddedPortablePdbEntry(BlobBuilder debugMetadata, ushort portablePdbVersion)
{
if (debugMetadata is null)
{
Throw.ArgumentNull(nameof(debugMetadata));
}
if (portablePdbVersion < PortablePdbVersions.MinFormatVersion)
{
Throw.ArgumentOutOfRange(nameof(portablePdbVersion));
}
int dataSize = WriteEmbeddedPortablePdbData(_dataBuilder, debugMetadata);
AddEntry(
type: DebugDirectoryEntryType.EmbeddedPortablePdb,
version: PortablePdbVersions.DebugDirectoryEmbeddedVersion(portablePdbVersion),
stamp: 0,
dataSize);
}
private static int WriteEmbeddedPortablePdbData(BlobBuilder builder, BlobBuilder debugMetadata)
{
int start = builder.Count;
// header (signature, decompressed size):
builder.WriteUInt32(PortablePdbVersions.DebugDirectoryEmbeddedSignature);
builder.WriteInt32(debugMetadata.Count);
// compressed data:
var compressed = new MemoryStream();
using (var deflate = new DeflateStream(compressed, CompressionLevel.Optimal, leaveOpen: true))
{
foreach (var blob in debugMetadata.GetBlobs())
{
var segment = blob.GetBytes();
deflate.Write(segment.Array!, segment.Offset, segment.Count);
}
}
// TODO: avoid multiple copies:
builder.WriteBytes(compressed.ToArray());
return builder.Count - start;
}
}
}