60 lines
1.0 KiB
C#
60 lines
1.0 KiB
C#
|
//
|
||
|
|
// Author:
|
||
|
|
// Jb Evain (jbevain@gmail.com)
|
||
|
|
//
|
||
|
|
// Copyright (c) 2008 - 2015 Jb Evain
|
||
|
|
// Copyright (c) 2008 - 2011 Novell, Inc.
|
||
|
|
//
|
||
|
|
// Licensed under the MIT/X11 license.
|
||
|
|
//
|
||
|
|
|
||
|
|
using System.Collections.Generic;
|
||
|
|
using System.Text;
|
||
|
|
|
||
|
|
namespace MonoFN.Cecil.Metadata {
|
||
|
|
|
||
|
|
class StringHeap : Heap {
|
||
|
|
|
||
|
|
readonly Dictionary<uint, string> strings = new Dictionary<uint, string> ();
|
||
|
|
|
||
|
|
public StringHeap (byte [] data)
|
||
|
|
: base (data)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
public string Read (uint index)
|
||
|
|
{
|
||
|
|
if (index == 0)
|
||
|
|
return string.Empty;
|
||
|
|
|
||
|
|
string @string;
|
||
|
|
if (strings.TryGetValue (index, out @string))
|
||
|
|
return @string;
|
||
|
|
|
||
|
|
if (index > data.Length - 1)
|
||
|
|
return string.Empty;
|
||
|
|
|
||
|
|
@string = ReadStringAt (index);
|
||
|
|
if (@string.Length != 0)
|
||
|
|
strings.Add (index, @string);
|
||
|
|
|
||
|
|
return @string;
|
||
|
|
}
|
||
|
|
|
||
|
|
protected virtual string ReadStringAt (uint index)
|
||
|
|
{
|
||
|
|
int length = 0;
|
||
|
|
int start = (int)index;
|
||
|
|
|
||
|
|
for (int i = start; ; i++) {
|
||
|
|
if (data [i] == 0)
|
||
|
|
break;
|
||
|
|
|
||
|
|
length++;
|
||
|
|
}
|
||
|
|
|
||
|
|
return Encoding.UTF8.GetString (data, start, length);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|