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// SourceMethodBuilder.cs
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// Martin Baulig (martin@ximian.com)
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// Marek Safar (marek.safar@gmail.com)
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// (C) 2002 Ximian, Inc. http://www.ximian.com
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// Copyright (C) 2012 Xamarin Inc (http://www.xamarin.com)
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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using System.Collections.Generic;
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namespace Mono.CompilerServices.SymbolWriter
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public class SourceMethodBuilder
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List<LocalVariableEntry> _locals;
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List<CodeBlockEntry> _blocks;
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List<ScopeVariable> _scope_vars;
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System.Collections.Stack _block_stack;
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Stack<CodeBlockEntry> _block_stack;
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readonly List<LineNumberEntry> method_lines;
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readonly ICompileUnit _comp_unit;
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readonly IMethodDef method;
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public SourceMethodBuilder (ICompileUnit comp_unit)
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this._comp_unit = comp_unit;
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method_lines = new List<LineNumberEntry> ();
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public SourceMethodBuilder (ICompileUnit comp_unit, int ns_id, IMethodDef method)
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public void MarkSequencePoint (int offset, SourceFileEntry file, int line, int column, bool is_hidden)
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int file_idx = file != null ? file.Index : 0;
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var lne = new LineNumberEntry (file_idx, line, offset, is_hidden);
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if (method_lines.Count > 0) {
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var prev = method_lines[method_lines.Count - 1];
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// Same offset cannot be used for multiple lines
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if (prev.Offset == offset) {
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// Use the new location because debugger will adjust
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// the breakpoint to next line with sequence point
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if (LineNumberEntry.LocationComparer.Default.Compare (lne, prev) > 0)
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method_lines[method_lines.Count - 1] = lne;
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method_lines.Add (lne);
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public void StartBlock (CodeBlockEntry.Type type, int start_offset)
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if (_block_stack == null) {
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_block_stack = new System.Collections.Stack ();
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_block_stack = new Stack<CodeBlockEntry> ();
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_blocks = new List<CodeBlockEntry> ();
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int parent = CurrentBlock != null ? CurrentBlock.Index : -1;
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CodeBlockEntry block = new CodeBlockEntry (
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_blocks.Count + 1, parent, type, start_offset);
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_block_stack.Push (block);
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public void EndBlock (int end_offset)
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CodeBlockEntry block = (CodeBlockEntry) _block_stack.Pop ();
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block.Close (end_offset);
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public CodeBlockEntry[] Blocks {
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return new CodeBlockEntry [0];
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CodeBlockEntry[] retval = new CodeBlockEntry [_blocks.Count];
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_blocks.CopyTo (retval, 0);
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public CodeBlockEntry CurrentBlock {
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if ((_block_stack != null) && (_block_stack.Count > 0))
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return (CodeBlockEntry) _block_stack.Peek ();
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public LocalVariableEntry[] Locals {
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return new LocalVariableEntry [0];
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return _locals.ToArray ();
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public ICompileUnit SourceFile {
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public void AddLocal (int index, string name)
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_locals = new List<LocalVariableEntry> ();
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int block_idx = CurrentBlock != null ? CurrentBlock.Index : 0;
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_locals.Add (new LocalVariableEntry (index, name, block_idx));
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public ScopeVariable[] ScopeVariables {
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if (_scope_vars == null)
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return new ScopeVariable [0];
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return _scope_vars.ToArray ();
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public void AddScopeVariable (int scope, int index)
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if (_scope_vars == null)
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_scope_vars = new List<ScopeVariable> ();
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new ScopeVariable (scope, index));
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public void DefineMethod (MonoSymbolFile file)
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DefineMethod (file, method.Token);
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public void DefineMethod (MonoSymbolFile file, int token)
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MethodEntry entry = new MethodEntry (
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file, _comp_unit.Entry, token, ScopeVariables,
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Locals, method_lines.ToArray (), Blocks, null, 0, ns_id);
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file.AddMethod (entry);