public void TinyBody()
{
var bodyBuilder = new BlobBuilder();
var codeBuilder = new BlobBuilder();
var branchBuilder = new BranchBuilder();
var il = new InstructionEncoder(codeBuilder, branchBuilder);
var bodyEncoder = new MethodBodyEncoder(
bodyBuilder,
maxStack: 2,
exceptionRegionCount: 0,
localVariablesSignature: default(StandaloneSignatureHandle),
attributes: MethodBodyAttributes.None);
Assert.True(bodyEncoder.IsTiny(10));
Assert.True(bodyEncoder.IsTiny(63));
Assert.False(bodyEncoder.IsTiny(64));
codeBuilder.WriteBytes(1, 61);
var l1 = il.DefineLabel();
il.MarkLabel(l1);
Assert.Equal(61, branchBuilder.Labels.Single());
il.Branch(ILOpCode.Br, l1);
var brInfo = branchBuilder.Branches.Single();
Assert.Equal(61, brInfo.ILOffset);
Assert.Equal(l1, brInfo.Label);
Assert.Equal((byte)ILOpCode.Br_s, brInfo.ShortOpCode);
AssertEx.Equal(new byte[] { 1, (byte)ILOpCode.Br_s, unchecked((byte)-1) }, codeBuilder.ToArray(60, 3));
int bodyOffset;
bodyEncoder.WriteInstructions(codeBuilder, branchBuilder, out bodyOffset);
var bodyBytes = bodyBuilder.ToArray();
AssertEx.Equal(new byte[]
{
0xFE, // tiny header
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x2B, 0xFE
}, bodyBytes);
var body = ReadMethodBody(bodyBytes);
Assert.Equal(0, body.ExceptionRegions.Length);
Assert.Equal(default(StandaloneSignatureHandle), body.LocalSignature);
Assert.Equal(8, body.MaxStack);
Assert.Equal(bodyBytes.Length, body.Size);
var ilBytes = body.GetILBytes();
AssertEx.Equal(new byte[]
{
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x2B, 0xFE
}, ilBytes);
}
public void BranchErrors()
{
var codeBuilder = new BlobBuilder();
var il = new InstructionEncoder(codeBuilder);
Assert.Throws<InvalidOperationException>(() => il.DefineLabel());
il = new InstructionEncoder(codeBuilder, new BranchBuilder());
il.DefineLabel();
il.DefineLabel();
var l2 = il.DefineLabel();
var branchBuilder = new BranchBuilder();
il = new InstructionEncoder(codeBuilder, branchBuilder);
var l0 = il.DefineLabel();
Assert.Throws<ArgumentException>(() => il.Branch(ILOpCode.Nop, l0));
Assert.Throws<ArgumentNullException>(() => il.Branch(ILOpCode.Br, default(LabelHandle)));
Assert.Throws<ArgumentException>(() => il.Branch(ILOpCode.Br, l2));
}
