sub_401090@<eax>(const char *a1@<ecx>, _DWORD *a2@<edi>)

sub_401090.c

int __usercall sub_401090@<eax>(const char *a1@<ecx>, _DWORD *a2@<edi>)
{
  const char *v2; // esi
  int v3; // edx
  signed int v4; // esi
  unsigned int v5; // eax
  double v6; // st7
  double v7; // st7
  void *v8; // eax
  void *v9; // ebx
  unsigned int v10; // eax
  double v11; // st7
  double v12; // st7
  void *v13; // eax
  int v14; // edx
  int v15; // edx
  int v16; // eax
  int v18; // [esp+10h] [ebp-1D0h]
  char v19; // [esp+20h] [ebp-1C0h]
  char v20; // [esp+78h] [ebp-168h]
  __int64 v21; // [esp+C0h] [ebp-120h]
  float v22; // [esp+CCh] [ebp-114h]
  char v23; // [esp+D0h] [ebp-110h]
  int v24; // [esp+1DCh] [ebp-4h]

  v2 = a1;
  sub_401750((int)&v18);
  v24 = 0;
  strcpy(&v23, v2);
  if ( sub_4024A0(&v23, (int)&v19, (std::locale::facet *)0x23) )
    std::basic_ios<char,std::char_traits<char>>::clear((char *)&v18 + *(_DWORD *)(v18 + 4), 0, 0);
  else
    std::basic_ios<char,std::char_traits<char>>::setstate((char *)&v18 + *(_DWORD *)(v18 + 4), 2, 0);
  std::basic_istream<char,std::char_traits<char>>::read(&v18, *a2, 14, 0);
  std::basic_istream<char,std::char_traits<char>>::read(&v18, a2[1], 40, 0);
  v3 = a2[1];
  v4 = *(unsigned __int16 *)(v3 + 14);
  if ( v4 == 2 || v4 == 4 || v4 == 8 )
  {
    v5 = *(unsigned __int16 *)(v3 + 14);
    *((float *)&v21 + 1) = 2.0;
    if ( v4 < 0 )
      v5 = -v4;
    v22 = 1.0;
    while ( 1 )
    {
      v6 = *((float *)&v21 + 1);
      if ( v5 & 1 )
        v22 = v22 * v6;
      v5 >>= 1;
      if ( !v5 )
        break;
      *((float *)&v21 + 1) = v6 * v6;
    }
    v7 = v22;
    if ( v4 < 0 )
      v7 = 1.0 / v7;
    *((float *)&v21 + 1) = v7;
    v21 = (__int64)*((float *)&v21 + 1);
    v8 = operator new[](4 * v21);
    v9 = v8;
    *((float *)&v21 + 1) = 2.0;
    a2[2] = v8;
    v10 = v4;
    if ( v4 < 0 )
      v10 = -v4;
    v22 = 1.0;
    while ( 1 )
    {
      v11 = *((float *)&v21 + 1);
      if ( v10 & 1 )
        v22 = v22 * v11;
      v10 >>= 1;
      if ( !v10 )
        break;
      *((float *)&v21 + 1) = v11 * v11;
    }
    v12 = v22;
    if ( v4 < 0 )
      v12 = 1.0 / v12;
    *((float *)&v21 + 1) = v12;
    std::basic_istream<char,std::char_traits<char>>::read(
      &v18,
      v9,
      (unsigned __int64)(*((float *)&v21 + 1) * 4.0),
      (unsigned __int64)(*((float *)&v21 + 1) * 4.0) >> 32);
  }
  v13 = operator new[](*(_DWORD *)(a2[1] + 20) + 1);
  v14 = a2[1];
  a2[3] = v13;
  std::basic_istream<char,std::char_traits<char>>::read(&v18, v13, *(_DWORD *)(v14 + 20), 0);
  v15 = v18;
  a2[4] = *(_DWORD *)(a2[1] + 20) >> 3;
  v16 = *(_DWORD *)(v15 + 4);
  HIDWORD(v21) = &v20;
  *(int *)((char *)&v18 + v16) = (int)&std::basic_ifstream<char,std::char_traits<char>>::`vftable';
  v24 = 1;
  sub_401810(&v19);
  v24 = -1;
  *(int *)((char *)&v18 + *(_DWORD *)(v18 + 4)) = (int)std::basic_istream<char,std::char_traits<char>>::`vftable';
  return std::basic_ios<char,std::char_traits<char>>::~basic_ios<char,std::char_traits<char>>();
}