/// <summary>
/// Does for locals what <see cref="System.Runtime.CompilerServices.DynamicAttribute"/> does for parameters, return types, and fields.
/// In particular, indicates which occurences of <see cref="object"/> in the signature are really dynamic.
/// </summary>
/// <remarks>
/// Appears when there are dynamic locals.
/// </remarks>
public static void ReadDynamicLocalsRecord(byte[] bytes, ref int offset, int size, out ImmutableArray<DynamicLocalBucket> buckets)
{
int tempOffset = offset;
int bucketCount = BitConverter.ToInt32(bytes, tempOffset);
tempOffset += 4;
var builder = ArrayBuilder<DynamicLocalBucket>.GetInstance(bucketCount);
for (int i = 0; i < bucketCount; i++)
{
const int numFlagBytes = 64;
var flags = 0UL;
for (int j = 0; j < numFlagBytes; j++)
{
var flag = bytes[tempOffset + j] != 0;
if (flag)
{
flags |= 1UL << j;
}
}
tempOffset += numFlagBytes;
int flagCount = BitConverter.ToInt32(bytes, tempOffset);
tempOffset += 4;
int slotId = BitConverter.ToInt32(bytes, tempOffset);
tempOffset += 4;
const int numNameBytes = 128;
var pooled = PooledStringBuilder.GetInstance();
var nameBuilder = pooled.Builder;
for (int j = 0; j < numNameBytes; j += 2)
{
char ch = BitConverter.ToChar(bytes, tempOffset + j);
if (ch == 0) break;
nameBuilder.Append(ch);
}
tempOffset += numNameBytes; //The Identifier name takes 64 WCHAR no matter how big its actual length is.
var name = pooled.ToStringAndFree();
var bucket = new DynamicLocalBucket(flagCount, flags, slotId, name);
builder.Add(bucket);
}
buckets = builder.ToImmutableAndFree();
offset += size - CdiRecordHeaderSize;
Debug.Assert(offset >= tempOffset);
}
/// <summary>
/// Does for locals what <see cref="System.Runtime.CompilerServices.DynamicAttribute"/> does for parameters, return types, and fields.
/// In particular, indicates which occurrences of <see cref="object"/> in the signature are really dynamic.
/// </summary>
/// <remarks>
/// Appears when there are dynamic locals.
/// </remarks>
/// <exception cref="InvalidOperationException">Bad data.</exception>
public static ImmutableArray<DynamicLocalBucket> DecodeDynamicLocalsRecord(ImmutableArray<byte> bytes)
{
int offset = 0;
int bucketCount = ReadInt32(bytes, ref offset);
var builder = ArrayBuilder<DynamicLocalBucket>.GetInstance(bucketCount);
for (int i = 0; i < bucketCount; i++)
{
const int FlagBytesCount = 64;
ulong flags = 0UL;
for (int j = 0; j < FlagBytesCount; j++)
{
var flag = ReadByte(bytes, ref offset) != 0;
if (flag)
{
flags |= 1UL << j;
}
}
int flagCount = ReadInt32(bytes, ref offset);
int slotId = ReadInt32(bytes, ref offset);
const int NameBytesCount = 128;
var pooled = PooledStringBuilder.GetInstance();
var nameBuilder = pooled.Builder;
int nameEnd = offset + NameBytesCount;
while (offset < nameEnd)
{
char ch = (char)ReadInt16(bytes, ref offset);
if (ch == 0)
{
// The Identifier name takes 64 WCHAR no matter how big its actual length is.
offset = nameEnd;
break;
}
nameBuilder.Append(ch);
}
var name = pooled.ToStringAndFree();
var bucket = new DynamicLocalBucket(flagCount, flags, slotId, name);
builder.Add(bucket);
}
return builder.ToImmutableAndFree();
}
