char __fastcall sub_19FC(unsigned __int8 a1, char a2, char a3, __int64 a4, char a5, char a6, char a7)
{
  char result; // al
  int v10; // ecx
  int v11; // ecx
  __int64 v12; // rdx

  result = 0; /*0x1a00*/
  if ( a1 ) /*0x1a0b*/
  {
    v10 = a1 - 1; /*0x1a0d*/
    if ( v10 ) /*0x1a10*/
    {
      v11 = v10 - 1; /*0x1a12*/
      if ( v11 ) /*0x1a15*/
      {
        if ( v11 != 1 ) /*0x1a1a*/
          return result; /*0x1a1a*/
        if ( a7 == 1 ) /*0x1a24*/
        {
          if ( !a6 ) /*0x1a2a*/
            return result; /*0x1a2a*/
          result = byte_7521; /*0x1a2c*/
        }
        else
        {
          if ( !a6 ) /*0x1a38*/
            return result; /*0x1a38*/
          result = byte_7503; /*0x1a3a*/
        }
      }
      else if ( a7 == 1 ) /*0x1a47*/
      {
        if ( !a6 ) /*0x1a4d*/
          return result; /*0x1a4d*/
        result = byte_751C; /*0x1a4f*/
      }
      else
      {
        if ( !a6 ) /*0x1a5b*/
          return result; /*0x1a5b*/
        result = byte_74FE; /*0x1a5d*/
      }
    }
    else
    {
      if ( !a5 ) /*0x1a69*/
        return result; /*0x1a69*/
      result = byte_74F9; /*0x1a6b*/
    }
  }
  else
  {
    if ( !a5 ) /*0x1a77*/
      return result; /*0x1a77*/
    result = byte_74F4; /*0x1a79*/
  }
  v12 = (unsigned __int8)byte_7D91; /*0x1a7f*/
  byte_7D60[2 * (unsigned __int8)byte_7D91 + 1] = a3 + a1 - a2; /*0x1a93*/
  byte_7D60[2 * v12 + 2] = result; /*0x1a98*/
  byte_7D91 = v12 + 1; /*0x1a9f*/
  return result; /*0x1aa5*/
}