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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 Cecil.FlowAnalysis.ActionFlow;
using Cecil.FlowAnalysis.ControlFlow;
using Mono.Collections.Generic;
namespace Cecil.FlowAnalysis.ActionFlow {
public class ActionFlowGraph {
Collection<ActionBlock> _blocks;
ControlFlowGraph _cfg;
public ActionFlowGraph (ControlFlowGraph cfg, Collection<ActionBlock> blocks)
{
if (null == cfg) throw new ArgumentNullException ("cfg");
if (null == blocks) throw new ArgumentNullException ("blocks");
_cfg = cfg;
_blocks = blocks;
}
public ControlFlowGraph ControlFlowGraph {
get { return _cfg; }
}
public Collection<ActionBlock> Blocks {
get { return _blocks; }
}
public bool IsBranchTarget (ActionBlock block)
{
if (null == block) throw new ArgumentNullException ("block");
foreach (ActionBlock p in block.Predecessors) {
switch (p.ActionType) {
case ActionType.Branch:
BranchActionBlock br = (BranchActionBlock) p;
if (br.Target == block) return true;
break;
case ActionType.ConditionalBranch:
ConditionalBranchActionBlock cbr = (ConditionalBranchActionBlock) p;
if (cbr.Then == block) return true;
break;
}
}
return false;
}
internal void ReplaceAt (int index, ActionBlock block)
{
if (null == block) throw new ArgumentNullException ("block");
ActionBlock existing = _blocks [index];
foreach (ActionBlock p in existing.Predecessors.ToArray ()) {
p.ReplaceSuccessor (existing, block);
}
Remove (existing);
_blocks.Insert (index, block);
}
void Remove (ActionBlock block)
{
foreach (ActionBlock s in block.Successors) {
s.RemovePredecessor (block);
if (0 == s.Predecessors.Count) {
Remove (s);
}
}
_blocks.Remove (block);
}
}
}
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