// 
// FMOD_OS_File_Open from 0x1800c0d40 to 0x1800c0eaf (367 bytes)
// 
// 6 xrefs:
// > sub_1800B41C0 @ 0x1800b41cf
// > sub_1800BEF40 @ 0x1800bf09c
// > sub_1800BF3B0 @ 0x1800bf4df
// > sub_180114370 @ 0x1801143dd
// > <???> @ 0x180194348
// > <???> @ 0x1801fdb48
// 
// This function is hookable on this platform!
// 
// Using BromaIDA 8.0.0 @ https://github.com/Stazzical/BromaIDA
// Using bindings at commit ba9f177b at Thu Jul 16 22:52:06 2026 from https://github.com/geode-sdk/bindings
// 

__int64 __fastcall FMOD_OS_File_Open(LPCCH lpMultiByteStr, DWORD dwShareMode, DWORD *a3, _QWORD *a4)
{
  unsigned int v7; // ebx
  DWORD LowPart; // eax
  HANDLE FileW; // rbx
  HANDLE v10; // rax
  DWORD LastError; // eax
  LARGE_INTEGER FileSize; // [rsp+40h] [rbp-258h] BYREF
  WCHAR WideCharStr[256]; // [rsp+50h] [rbp-248h] BYREF
  _DWORD *v15; // [rsp+250h] [rbp-48h]
  LPCWSTR lpFileName; // [rsp+258h] [rbp-40h]

  lpFileName = WideCharStr;
  v15 = nullptr;
  WideCharStr[0] = 0;
  v7 = sub_1800C0900(WideCharStr, lpMultiByteStr);
  if ( !v7 )
  {
    LowPart = 0;
    FileW = nullptr;
    FileSize.QuadPart = 0;
    if ( dwShareMode )
    {
      if ( dwShareMode != 1 )
      {
LABEL_14:
        *a4 = FileW;
        v7 = 0;
        *a3 = LowPart;
        goto LABEL_15;
      }
      FileW = CreateFileW(lpFileName, 0x40000000u, 1u, nullptr, 2u, 0x80u, nullptr);
      if ( FileW == (HANDLE)-1LL )
      {
        v7 = 13;
        goto LABEL_15;
      }
    }
    else
    {
      v10 = CreateFileW(lpFileName, 0x80000000, 1u, nullptr, 3u, 0x80u, nullptr);
      FileW = v10;
      if ( v10 == (HANDLE)-1LL )
      {
        LastError = GetLastError();
        if ( LastError - 2 <= 1 || LastError == 123 )
          v7 = 18;
        else
          v7 = 13;
        goto LABEL_15;
      }
      if ( !GetFileSizeEx(v10, &FileSize) )
      {
        v7 = 13;
        goto LABEL_15;
      }
    }
    LowPart = FileSize.LowPart;
    goto LABEL_14;
  }
LABEL_15:
  if ( v15 )
    sub_1800B6AA0(*((_QWORD *)off_1801AED20 + 52), v15);
  return v7;
}