int __usercall sub_404660<eax>(int a1<ebx>)
{
  int result; // eax@1
  int v2; // edi@1
  int v3; // eax@2
  int v4; // ecx@3
  int v5; // eax@5
  int v6; // esi@5
  int v7; // eax@5
  int v8; // edx@5
  char v9; // al@6
  int v10; // ecx@8
  int v11; // eax@12
  int v12; // ecx@12
  int v13; // edx@12
  int v14; // ecx@17
  bool v15; // al@19
  int v16; // [sp-8h] [bp-44h]@12
  int v17; // [sp-4h] [bp-40h]@12
  int v18; // [sp+10h] [bp-2Ch]@5
  int v19; // [sp+14h] [bp-28h]@1
  int v20; // [sp+18h] [bp-24h]@5
  int v21; // [sp+1Ch] [bp-20h]@5
  int v22; // [sp+20h] [bp-1Ch]@5
  int v23; // [sp+28h] [bp-14h]@10
  int v24; // [sp+30h] [bp-Ch]@1
  int v25; // [sp+38h] [bp-4h]@5

  result = (int)&v24;
  v2 = 0;
  v19 = 0;
  if ( *(_DWORD *)(a1 + 632) )
  {
    do
    {
      v3 = *(_DWORD *)(a1 + 628);
      if ( !*(_BYTE *)(v3 + v2 + 40) )
      {
        v4 = v3 + v2 + 4;
        if ( *(_DWORD *)(v3 + v2 + 24) >= 0x10u )
          v4 = *(_DWORD *)v4;
        v5 = sub_536EA0(v4);
        v25 = 0;
        v6 = *(_DWORD *)(v5 + 4);
        v7 = *(_DWORD *)v5;
        v8 = v2 + *(_DWORD *)(a1 + 628) + 32;
        v18 = v2 + *(_DWORD *)(a1 + 628) + 32;
        v21 = 0;
        v22 = 0;
        v20 = v7;
        if ( v6 )
        {
          v9 = (*(int (__thiscall **)(int))(*(_DWORD *)v6 + 4))(v6);
          v8 = v18;
          if ( v9 )
          {
            v22 = v6;
            v21 = v20;
          }
        }
        v10 = *(_DWORD *)(v8 + 4);
        *(_DWORD *)(v8 + 4) = v22;
        *(_DWORD *)v8 = v21;
        if ( v10 )
          (*(void (**)(void))(*(_DWORD *)v10 + 12))();
        v25 = -1;
        if ( v23 )
          (*(void (**)(void))(*(_DWORD *)v23 + 12))();
        (*(void (__stdcall **)(char *))(**(_DWORD **)(v2 + *(_DWORD *)(a1 + 628) + 32) + 60))(off_5FE588[0]);
        v11 = v2 + *(_DWORD *)(a1 + 628) + 32;
        v16 = 0;
        v17 = 0;
        v12 = *(_DWORD *)(v11 + 4);
        v13 = *(_DWORD *)v11;
        v20 = v12;
        v18 = v13;
        if ( v12 && (unsigned __int8)(*(int (__cdecl **)(int))(*(_DWORD *)v12 + 4))(v16) )
        {
          if ( v17 )
            (*(void (**)(void))(*(_DWORD *)v17 + 12))();
          v17 = v20;
          v16 = v18;
        }
        sub_405F90(v16, v17);
        v14 = *(_DWORD *)(v2 + *(_DWORD *)(a1 + 628) + 32);
        v15 = v14 && (unsigned __int8)(**(int (***)(void))v14)();
        *(_BYTE *)(v2 + *(_DWORD *)(a1 + 628) + 40) = v15;
        *(_BYTE *)(v2 + *(_DWORD *)(a1 + 628) + 41) = 0;
      }
      result = v19 + 1;
      v2 += 116;
      v19 = result;
    }
    while ( (unsigned int)result < *(_DWORD *)(a1 + 632) );
  }
  return result;
}