128 lines
2.8 KiB
C#
128 lines
2.8 KiB
C#
//
|
|
// StackInfo.cs
|
|
//
|
|
// Authors:
|
|
// Alexander Chebaturkin (chebaturkin@gmail.com)
|
|
//
|
|
// Copyright (C) 2011 Alexander Chebaturkin
|
|
//
|
|
// 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.
|
|
//
|
|
|
|
namespace Mono.CodeContracts.Static.Analysis.StackAnalysis {
|
|
struct StackInfo {
|
|
private StackInfo<object> stack;
|
|
|
|
public int Depth {
|
|
get { return this.stack.Depth; }
|
|
}
|
|
|
|
public object this [int offset] {
|
|
get { return this.stack [offset]; }
|
|
}
|
|
|
|
public StackInfo (int depth, int capacity)
|
|
{
|
|
this.stack = new StackInfo<object> (depth, capacity);
|
|
}
|
|
|
|
private StackInfo (StackInfo<object> copy)
|
|
{
|
|
this.stack = copy;
|
|
}
|
|
|
|
public StackInfo Pop (int slots)
|
|
{
|
|
return new StackInfo (this.stack.Pop (slots));
|
|
}
|
|
|
|
public StackInfo Push ()
|
|
{
|
|
this.stack.Push (null);
|
|
return this;
|
|
}
|
|
|
|
public StackInfo PushThis ()
|
|
{
|
|
this.stack.Push (true);
|
|
return this;
|
|
}
|
|
|
|
public StackInfo Push<T> (T target)
|
|
{
|
|
this.stack.Push (target);
|
|
return this;
|
|
}
|
|
|
|
public void Adjust (int delta)
|
|
{
|
|
if (delta == 0)
|
|
return;
|
|
if (delta < 0)
|
|
this.stack.Pop (-delta);
|
|
for (int i = 0; i < delta; ++i)
|
|
Push ();
|
|
}
|
|
|
|
public bool IsThis (int offset)
|
|
{
|
|
return As<bool> (offset);
|
|
}
|
|
|
|
public bool TryGet<T> (int offset, out T target)
|
|
{
|
|
object o = this [offset];
|
|
if (o is T) {
|
|
target = (T) o;
|
|
return true;
|
|
}
|
|
target = default(T);
|
|
return false;
|
|
}
|
|
|
|
private T As<T> (int offset)
|
|
{
|
|
T res;
|
|
TryGetTarget (offset, out res);
|
|
return res;
|
|
}
|
|
|
|
public StackInfo Clone ()
|
|
{
|
|
return new StackInfo (new StackInfo<object> (this.stack));
|
|
}
|
|
|
|
public override string ToString ()
|
|
{
|
|
return this.stack.ToString ();
|
|
}
|
|
|
|
public bool TryGetTarget<T> (int offset, out T target)
|
|
{
|
|
if (this [offset] is T) {
|
|
target = (T) this [offset];
|
|
return true;
|
|
}
|
|
target = default(T);
|
|
return false;
|
|
}
|
|
}
|
|
}
|