ReadWriteBit

int __thiscall Packet::WriteReadBitArray(_DWORD *this, _DWORD *a2, int a3)
{
  _DWORD *v3; // esi
  _DWORD *v4; // edi
  int v5; // edx
  unsigned int v6; // edx
  int v7; // ecx
  __int64 v8; // rax
  int *v10; // [esp+14h] [ebp-4h]
  unsigned int v11; // [esp+24h] [ebp+Ch]

  v3 = a2;
  v4 = this;
  *a2 = 0;
  v5 = this[2];
  a2[1] = 0;
  if ( v5 )
    v6 = *(_DWORD *)(v5 + 16) - this[3];
  else
    v6 = 0;
  v7 = a3;
  v11 = a3 + v4[4];
  if ( v6 < (v11 + 7) >> 3 )
    return sub_69B480(v4, a2, v7);
  v10 = (int *)v4[3];
  switch ( (unsigned int)(v7 + 7) >> 3 )
  {
    case 1u:
      v8 = (unsigned __int8)sub_69BA50(v4 + 4, (int)(v4 + 3), v7);
      goto LABEL_10;
    case 2u:
      LOWORD(v8) = sub_69BB40(v4[4], (int)v10, v7);
      v4[3] = (char *)v10 + (v11 >> 3);
      v4[4] = v11 & 7;
      v8 = (unsigned __int16)v8;
      goto LABEL_10;
    case 3u:
    case 4u:
      *a2 = sub_69BAD0(v4 + 4, (int)(v4 + 3), v7);
      v4[1] += v4[3] - (_DWORD)v10;
      a2[1] = 0;
      return 0;
    case 5u:
    case 6u:
    case 7u:
    case 8u:
      LODWORD(v8) = sub_484200(v4[4], v10, v7);
      v4[4] = v11 & 7;
      v3 = a2;
      v4[3] = (char *)v10 + (v11 >> 3);
LABEL_10:
      *(_QWORD *)v3 = v8;
      break;
    default:
      break;
  }
  v4[1] += v4[3] - (_DWORD)v10;
  return 0;
}