CmGetDeviceInterfaceRegKeyPath

__int64 __fastcall CmGetDeviceInterfaceRegKeyPath(
        __int64 a1,
        const WCHAR *a2,
        int a3,
        int a4,
        int a5,
        __int64 a6,
        size_t cchDest,
        __int64 a8){
  __int16 v9; 
  wchar_t *v11; 
  unsigned int v12; 
  char v13; 
  __int64 v14; 
  __int64 v15; 
  unsigned __int64 v16; 
  wchar_t *PoolWithTag; 
  __int64 v18; 
  int DeviceInterfaceSubkeyPath; 
  WCHAR **v20; 
  int v21; 
  __int64 v22; 
  __int64 v23; 
  unsigned __int64 v24; 
  int v25; 
  __int64 v27; 
  WCHAR **v28; 
  __int64 v29; 
  UINT64 *dwFlags; 
  UINT64 *dwFlagsa; 
  NTSTRSAFE_PCWSTR pszFormat; 
  NTSTRSAFE_PCWSTR pszFormata; 
  __int16 v34[40]; 
  v9 = a3;
  v11 = 0i64;
  if( !a3 || (a3 & 0xFFFFFCCC) != 0 )
    goto LABEL_54;
  v12 = (unsigned __int8)a3;
  if( (((unsigned __int8)a3 - 48) & 0xFFFFFFFD) != 0 )
  {
    if( (unsigned __int8)a3 != 49 )
      return(unsigned int)-1073741811;
    v13 = 0;
  }
  else
  {
    v13 = 1;
  }
  v14 = -1i64;
  v15 = -1i64;
  do
    ++v15;
  while( a2[v15] );
  v16 = 2 * v15 + 6;
  if( v16 > 0xFFFFFFFF )
    return(unsigned int)-1073741675;
  PoolWithTag = (wchar_t *)ExAllocatePoolWithTag(PagedPool, (unsigned int)v16, 0x52504E50ui64);
  v11 = PoolWithTag;
  if( !PoolWithTag )
    return(unsigned int)-1073741801;
  DeviceInterfaceSubkeyPath = CmGetDeviceInterfaceSubkeyPath(
                                v18,
                                a2,
                                v13,
                                (wchar_t *)v34,
                                PoolWithTag,
                                (unsigned int)v16 >> 1);
  if( DeviceInterfaceSubkeyPath < 0 )
    goto LABEL_27;
  v21 = v9 & 0x200;
  if( !v21 )
  {
    v22 = -1i64;
    do
      ++v22;
    while( v34[v22] );
    v23 = v22 + 48;
    goto LABEL_14;
  }
  if( !a4 )
  {
    v27 = -1i64;
    do
      ++v27;
    while( v34[v27] );
    v23 = v27 + 99;
    goto LABEL_14;
  }
  if( a4 == -1 )
  {
LABEL_54:
    DeviceInterfaceSubkeyPath = -1073741811;
    goto LABEL_27;
  }
  v29 = -1i64;
  do
    ++v29;
  while( v34[v29] );
  v23 = v29 + 96;
  do
LABEL_14:
    ++v14;
  while( v11[v14] );
  v24 = v23 + v14 + 1;
  if( v12 < 0x30 )
    goto LABEL_51;
  if( v12 <= 0x31 )
    goto LABEL_17;
  if( v12 == 50 )
    v24 += 18i64;
  else
LABEL_51:
    DeviceInterfaceSubkeyPath = -1073741811;
LABEL_17:
  if( DeviceInterfaceSubkeyPath >= 0 )
  {
    if( v24 > 0xFFFFFFFF )
    {
      DeviceInterfaceSubkeyPath = -1073741675;
    }
    else
    {
      DeviceInterfaceSubkeyPath = 0;
      if( a8 )
        *(_DWORD *)a8 = v24;
      if( (unsigned int)v24 <= (unsigned int)cchDest )
      {
        if( v21 )
        {
          if( a4 )
          {
            if( a4 == -1 )
              goto LABEL_25;
            LODWORD(dwFlags) = 2048;
            RtlStringCchPrintfExW(
              (WCHAR *)a6,
              (unsigned int)cchDest,
              0i64,
              0i64,
              (UINT64)dwFlags,
              L"%s\\%04u\\%s\\%s\\%s");
          }
          else
          {
            LODWORD(dwFlags) = 2048;
            RtlStringCchPrintfExW((WCHAR *)a6, (unsigned int)cchDest, 0i64, 0i64, (UINT64)dwFlags, L"%s\\%s\\%s\\%s");
          }
        }
        else
        {
          LODWORD(dwFlags) = 2048;
          RtlStringCchPrintfExW(
            (WCHAR *)a6,
            (unsigned int)cchDest,
            0i64,
            0i64,
            (UINT64)dwFlags,
            (const WCHAR *)L"%s\\%s\\%s");
        }
        DeviceInterfaceSubkeyPath = v25;
LABEL_25:
        if( DeviceInterfaceSubkeyPath >= 0 && v12 == 50 )
        {
          DeviceInterfaceSubkeyPath = RtlStringCchCatExW(
                                        (WCHAR *)a6,
                                        (unsigned int)cchDest,
                                        L"\\",
                                        v20,
                                        dwFlags,
                                        (UINT64)pszFormat);
          if( DeviceInterfaceSubkeyPath >= 0 )
            DeviceInterfaceSubkeyPath = RtlStringCchCatExW(
                                          (WCHAR *)a6,
                                          (unsigned int)cchDest,
                                          L"Device Parameters",
                                          v28,
                                          dwFlagsa,
                                          (UINT64)pszFormata);
        }
        goto LABEL_27;
      }
      DeviceInterfaceSubkeyPath = -1073741789;
    }
  }
LABEL_27:
  if( v11 )
    ExFreePoolWithTag(v11, 0);
  return(unsigned int)DeviceInterfaceSubkeyPath;
}

Referenced by: