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#region license
//
// (C) db4objects Inc. http://www.db4o.com
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#endregion
using System;
using System.Collections;
using Mono.Cecil.Cil;
using Mono.Collections.Generic;
namespace Cecil.FlowAnalysis.ControlFlow {
public class InstructionBlock : IComparable, IEnumerable {
public static readonly InstructionBlock [] NoSuccessors = new InstructionBlock [0];
Instruction _firstInstruction;
Instruction _lastInstruction;
InstructionBlock [] _successors = NoSuccessors;
public Instruction FirstInstruction {
get { return _firstInstruction; }
}
public Instruction LastInstruction {
get { return _lastInstruction; }
}
public InstructionBlock [] Successors {
get { return _successors; }
}
internal InstructionBlock (Instruction first)
{
if (null == first) throw new ArgumentNullException ("first");
_firstInstruction = first;
}
internal void SetLastInstruction (Instruction last)
{
if (null == last) throw new ArgumentNullException ("last");
_lastInstruction = last;
}
internal void SetSuccessors (InstructionBlock [] successors)
{
_successors = successors;
}
public int CompareTo (object obj)
{
return _firstInstruction.Offset.CompareTo (((InstructionBlock)obj).FirstInstruction.Offset);
}
public IEnumerator GetEnumerator ()
{
var instructions = new Collection<Instruction> ();
Instruction instruction = _firstInstruction;
while (true) {
instructions.Add (instruction);
if (instruction == _lastInstruction) break;
instruction = instruction.Next;
}
return instructions.GetEnumerator ();
}
}
}
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