private static bool FirstFileExists(FastIOSearchOption searchOption, string path, params string[] searchPatterns)
{
path = path.TrimEnd('\\');
if (string.IsNullOrWhiteSpace(path) || Path.GetInvalidPathChars().Any(path.Contains))
{
throw new ArgumentException("The path '" + path + "' is invalid in some, or other, regard.");
}
const int fileAttributeDirectory = 0x10;
const int ERROR_FILE_NOT_FOUND = 0x2;
// Other relevant errors (though we don't use them specifically at the moment)
//const int ERROR_PATH_NOT_FOUND = 0x3;
//const int ERROR_REM_NOT_LIST = 0x33;
//const int ERROR_BAD_NETPATH = 0x35;
WIN32_FIND_DATAW findData;
// Search the base directory first, and only then search subdirectories.
// TODO: Fix goofy duplicate code
if (searchOption != FastIOSearchOption.AllDirectoriesSkipTop)
{
foreach (var p in searchPatterns)
{
using var findHandle = FindFirstFileW(@"\\?\" + path.TrimEnd('\\') + '\\' + p, out findData);
if (findHandle.IsInvalid)
{
var err = Marshal.GetLastWin32Error();
if (err == ERROR_FILE_NOT_FOUND)
{
continue;
}
// Since the framework isn't here to save us, we should blanket-catch and throw on every
// possible error other than file-not-found (as that's an intended scenario, obviously).
// This isn't as nice as you'd get from a framework method call, but it gets the job done.
ThrowException(searchPatterns, err, path, p, 0);
}
do
{
if ((findData.dwFileAttributes & fileAttributeDirectory) != fileAttributeDirectory &&
findData.cFileName != "." && findData.cFileName != "..")
{
return(true);
}
} while (FindNextFileW(findHandle, out findData));
if (searchOption == FastIOSearchOption.TopDirectoryOnly)
{
return(false);
}
}
}
using (var findHandle = FindFirstFileW(@"\\?\" + path.TrimEnd('\\') + @"\*", out findData))
{
if (findHandle.IsInvalid)
{
var err = Marshal.GetLastWin32Error();
if (err != ERROR_FILE_NOT_FOUND)
{
ThrowException(searchPatterns, err, path, @"\* [looking for all directories]", 1);
}
}
do
{
if ((findData.dwFileAttributes & fileAttributeDirectory) == fileAttributeDirectory &&
findData.cFileName != "." && findData.cFileName != ".." &&
FirstFileExists(FastIOSearchOption.AllDirectories, Path.Combine(path, findData.cFileName),
searchPatterns))
{
return(true);
}
} while (FindNextFileW(findHandle, out findData));
return(false);
}
}
private static bool FirstFileExists(FastIOSearchOption searchOption, string path, params string[] searchPatterns)
{
path = NormalizeAndCheckPath(path, pathIsKnownValid: false);
// Other relevant errors (though we don't use them specifically at the moment)
//const int ERROR_PATH_NOT_FOUND = 0x3;
//const int ERROR_REM_NOT_LIST = 0x33;
//const int ERROR_BAD_NETPATH = 0x35;
WIN32_FIND_DATAW findData;
// Search the base directory first, and only then search subdirectories.
string pathC = @"\\?\" + path + "\\";
foreach (string p in searchPatterns)
{
using SafeSearchHandle findHandle = FindFirstFileExW(
pathC + p,
FINDEX_INFO_LEVELS.FindExInfoBasic,
out findData,
FINDEX_SEARCH_OPS.FindExSearchNameMatch,
IntPtr.Zero,
0);
if (findHandle.IsInvalid)
{
int err = Marshal.GetLastWin32Error();
if (err == ERROR_FILE_NOT_FOUND)
{
continue;
}
// Since the framework isn't here to save us, we should blanket-catch and throw on every
// possible error other than file-not-found (as that's an intended scenario, obviously).
// This isn't as nice as you'd get from a framework method call, but it gets the job done.
ThrowException(searchPatterns, err, path, p, 0);
}
do
{
if ((findData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != FILE_ATTRIBUTE_DIRECTORY &&
findData.cFileName != "." && findData.cFileName != "..")
{
return(true);
}
} while (FindNextFileW(findHandle, out findData));
if (searchOption == FastIOSearchOption.TopDirectoryOnly)
{
return(false);
}
}
using (SafeSearchHandle findHandle = FindFirstFileExW(
pathC + "*",
FINDEX_INFO_LEVELS.FindExInfoBasic,
out findData,
FINDEX_SEARCH_OPS.FindExSearchNameMatch,
IntPtr.Zero,
0))
{
if (findHandle.IsInvalid)
{
int err = Marshal.GetLastWin32Error();
if (err != ERROR_FILE_NOT_FOUND)
{
ThrowException(searchPatterns, err, path, @"\* [looking for all directories]", 1);
}
}
do
{
if ((findData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY &&
findData.cFileName != "." && findData.cFileName != ".." &&
FirstFileExists(FastIOSearchOption.AllDirectories, Path.Combine(path, findData.cFileName),
searchPatterns))
{
return(true);
}
} while (FindNextFileW(findHandle, out findData));
return(false);
}
}
private static bool FirstFileExists(FastIOSearchOption searchOption, string path, params string[] searchPatterns)
{
// Vital, path must not have a trailing separator
// We also normalize manually to all backslashes because we use \\?\ which skips normalization
path = path.Replace('/', '\\').TrimEnd(FMConstants.CA_Backslash);
bool pathContainsInvalidChars = false;
char[] invalidChars = Path.GetInvalidPathChars();
// Dumb loop to avoid LINQ.
for (int i = 0; i < invalidChars.Length; i++)
{
if (path.Contains(invalidChars[i]))
{
pathContainsInvalidChars = true;
break;
}
}
if (path.IsWhiteSpace() || pathContainsInvalidChars)
{
throw new ArgumentException("The path '" + path + "' is invalid in some, or other, regard.");
}
const int FILE_ATTRIBUTE_DIRECTORY = 0x10;
const int ERROR_FILE_NOT_FOUND = 0x2;
// Other relevant errors (though we don't use them specifically at the moment)
//const int ERROR_PATH_NOT_FOUND = 0x3;
//const int ERROR_REM_NOT_LIST = 0x33;
//const int ERROR_BAD_NETPATH = 0x35;
WIN32_FIND_DATAW findData;
// Search the base directory first, and only then search subdirectories.
// TODO: Fix goofy duplicate code
string pathC = @"\\?\" + path + "\\";
if (searchOption != FastIOSearchOption.AllDirectoriesSkipTop)
{
foreach (string p in searchPatterns)
{
using SafeSearchHandle findHandle = FindFirstFileEx(
pathC + p,
FINDEX_INFO_LEVELS.FindExInfoBasic,
out findData,
FINDEX_SEARCH_OPS.FindExSearchNameMatch,
IntPtr.Zero,
0);
if (findHandle.IsInvalid)
{
int err = Marshal.GetLastWin32Error();
if (err == ERROR_FILE_NOT_FOUND)
{
continue;
}
// Since the framework isn't here to save us, we should blanket-catch and throw on every
// possible error other than file-not-found (as that's an intended scenario, obviously).
// This isn't as nice as you'd get from a framework method call, but it gets the job done.
ThrowException(searchPatterns, err, path, p, 0);
}
do
{
if ((findData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != FILE_ATTRIBUTE_DIRECTORY &&
findData.cFileName != "." && findData.cFileName != "..")
{
return(true);
}
} while (FindNextFileW(findHandle, out findData));
if (searchOption == FastIOSearchOption.TopDirectoryOnly)
{
return(false);
}
}
}
using (SafeSearchHandle findHandle = FindFirstFileEx(
pathC + "*",
FINDEX_INFO_LEVELS.FindExInfoBasic,
out findData,
FINDEX_SEARCH_OPS.FindExSearchNameMatch,
IntPtr.Zero,
0))
{
if (findHandle.IsInvalid)
{
int err = Marshal.GetLastWin32Error();
if (err != ERROR_FILE_NOT_FOUND)
{
ThrowException(searchPatterns, err, path, @"\* [looking for all directories]", 1);
}
}
do
{
if ((findData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY &&
findData.cFileName != "." && findData.cFileName != ".." &&
FirstFileExists(FastIOSearchOption.AllDirectories, Path.Combine(path, findData.cFileName),
searchPatterns))
{
return(true);
}
} while (FindNextFileW(findHandle, out findData));
return(false);
}
}
