System.UnSafeCharBuffer

namespace System

{

[StructLayout(LayoutKind.Sequential,CharSet=CharSet.Ansi)]

internal struct UnSafeCharBuffer

{

private char* m_buffer;

private int m_totalSize;

private int m_length;

public UnSafeCharBuffer(char* buffer,int bufferSize)

{

//.maxstack  8

//IL_0000:  ldarg.0

//IL_0001:  ldarg.1

//IL_0002:  stfld      char* System.UnSafeCharBuffer::m_buffer

//IL_0007:  ldarg.0

//IL_0008:  ldarg.2

//IL_0009:  stfld      int32 System.UnSafeCharBuffer::m_totalSize

//IL_000e:  ldarg.0

//IL_000f:  ldc.i4.0

//IL_0010:  stfld      int32 System.UnSafeCharBuffer::m_length

//IL_0015:  ret

            this.m_buffer = buffer;

            this.m_totalSize = bufferSize;

            this.m_length = 0;

}

public void AppendString(string stringToAppend)

{

//.maxstack  4

            //.locals init (char* V_0,                  

//string pinned V_1)

//IL_0000:  ldarg.1

//IL_0001:  call       bool System.String::IsNullOrEmpty(string)

//IL_0006:  brfalse.s  IL_0009

//IL_0008:  ret

//IL_0009:  ldarg.0

//IL_000a:  ldfld      int32 System.UnSafeCharBuffer::m_totalSize

//IL_000f:  ldarg.0

//IL_0010:  ldfld      int32 System.UnSafeCharBuffer::m_length

//IL_0015:  sub

//IL_0016:  ldarg.1

//IL_0017:  callvirt   instance int32 System.String::get_Length()

//IL_001c:  bge.s      IL_0024

//IL_001e:  newobj     instance void System.IndexOutOfRangeException::.ctor()

//IL_0023:  throw

            //IL_0024:  ldarg.1                     

//IL_0025:  stloc.1

//IL_0026:  ldloc.1

//IL_0027:  conv.i

//IL_0028:  dup

//IL_0029:  brfalse.s  IL_0031

//IL_002b:  call       int32 System.Runtime.CompilerServices.RuntimeHelpers::get_OffsetToStringData()

//IL_0030:  add

//IL_0031:  stloc.0

//IL_0032:  ldloc.0

//IL_0033:  ldarg.0

//IL_0034:  ldfld      char* System.UnSafeCharBuffer::m_buffer

//IL_0039:  ldarg.0

//IL_003a:  ldfld      int32 System.UnSafeCharBuffer::m_length

//IL_003f:  conv.i

//IL_0040:  ldc.i4.2

//IL_0041:  mul

//IL_0042:  add

//IL_0043:  ldarg.1

//IL_0044:  callvirt   instance int32 System.String::get_Length()

//IL_0049:  ldc.i4.2

//IL_004a:  mul

//IL_004b:  call       void System.Buffer::memcpyimpl(uint8*,

//uint8*,

//int32)

//IL_0050:  ldnull

//IL_0051:  stloc.1

//IL_0052:  ldarg.0

//IL_0053:  dup

//IL_0054:  ldfld      int32 System.UnSafeCharBuffer::m_length

//IL_0059:  ldarg.1

//IL_005a:  callvirt   instance int32 System.String::get_Length()

//IL_005f:  add

//IL_0060:  stfld      int32 System.UnSafeCharBuffer::m_length

//IL_0065:  ret            

            if(!string.IsNullOrEmpty(stringToAppend))

            {

                if((this.m_totalSize-this.m_length)>=stringToAppend.Length)

                {

                    //IL_0024

                    V_1 = stringToAppend;

                    fixed (char* V_0 = stringToAppend)

                    {

                        System.Buffer.memcpyimpl(V_0, this.m_buffer + this.m_length * 2, stringToAppend.Length * 2);

                    }                    

                    //IL_0050

                    this.m_length=this.m_length+stringToAppend.Length;

                }

                else

                {

                    throw new System.IndexOutOfRangeException();

                }

            }

}

        public int Length

        {

            get

            {

                ;

            }            

            //.get instance int32 System.UnSafeCharBuffer::get_Length()

        }

public int get_Length()

{

//.maxstack  8

//IL_0000:  ldarg.0

//IL_0001:  ldfld      int32 System.UnSafeCharBuffer::m_length

//IL_0006:  ret

            return this.m_length;

}

}

}