internal FileSystemEnumerable(
string userPath, string searchPattern,
SearchOption searchOption, SearchTarget searchTarget,
Func <string, bool, T> translateResult)
{
// Basic validation of the input path
if (userPath == null)
{
throw new ArgumentNullException("path");
}
if (string.IsNullOrWhiteSpace(userPath))
{
throw new ArgumentException(SR.Argument_EmptyPath, "path");
}
// Validate and normalize the search pattern. If after doing so it's empty,
// matching Win32 behavior we can skip all additional validation and effectively
// return an empty enumerable.
searchPattern = NormalizeSearchPattern(searchPattern);
if (searchPattern.Length > 0)
{
PathHelpers.CheckSearchPattern(searchPattern);
PathHelpers.ThrowIfEmptyOrRootedPath(searchPattern);
// If the search pattern contains any paths, make sure we factor those into
// the user path, and then trim them off.
int lastSlash = searchPattern.LastIndexOf(Path.DirectorySeparatorChar);
if (lastSlash >= 0)
{
if (lastSlash >= 1)
{
userPath = Path.Combine(userPath, searchPattern.Substring(0, lastSlash));
}
searchPattern = searchPattern.Substring(lastSlash + 1);
}
string fullPath = Path.GetFullPath(userPath);
// Store everything for the enumerator
_initialDirectory = new PathPair(userPath, fullPath);
_searchPattern = searchPattern;
_searchOption = searchOption;
_includeFiles = (searchTarget & SearchTarget.Files) != 0;
_includeDirectories = (searchTarget & SearchTarget.Directories) != 0;
_translateResult = translateResult;
}
// Open the first enumerator so that any errors are propagated synchronously.
_firstEnumerator = Enumerate();
}
private static string NormalizeSearchPattern(string searchPattern)
{
Contract.Requires(searchPattern != null);
// Win32 normalization trims only U+0020.
string tempSearchPattern = searchPattern.TrimEnd(PathHelpers.TrimEndChars);
// Make this corner case more useful, like dir
if (tempSearchPattern.Equals("."))
{
tempSearchPattern = "*";
}
PathHelpers.CheckSearchPattern(tempSearchPattern);
return(tempSearchPattern);
}
internal FileSystemEnumerable(
string userPath, string searchPattern,
SearchOption searchOption, SearchTarget searchTarget,
Func <string, bool, T> translateResult)
{
// Basic validation of the input path
if (userPath == null)
{
throw new ArgumentNullException("path");
}
if (string.IsNullOrEmpty(userPath))
{
throw new ArgumentException(SR.Argument_EmptyPath, "path");
}
// Validate and normalize the search pattern. If after doing so it's empty,
// matching Win32 behavior we can skip all additional validation and effectively
// return an empty enumerable.
searchPattern = NormalizeSearchPattern(searchPattern);
if (searchPattern.Length > 0)
{
PathHelpers.CheckSearchPattern(searchPattern);
PathHelpers.ThrowIfEmptyOrRootedPath(searchPattern);
// If the search pattern contains any paths, make sure we factor those into
// the user path, and then trim them off.
int lastSlash = searchPattern.LastIndexOf(Path.DirectorySeparatorChar);
if (lastSlash >= 0)
{
if (lastSlash >= 1)
{
userPath = Path.Combine(userPath, searchPattern.Substring(0, lastSlash));
}
searchPattern = searchPattern.Substring(lastSlash + 1);
}
// Typically we shouldn't see either of these cases, an upfront check is much faster
foreach (char c in searchPattern)
{
if (c == '\\' || c == '[')
{
// We need to escape any escape characters in the search pattern
searchPattern = searchPattern.Replace(@"\", @"\\");
// And then escape '[' to prevent it being picked up as a wildcard
searchPattern = searchPattern.Replace(@"[", @"\[");
break;
}
}
string fullPath = Path.GetFullPath(userPath);
// Store everything for the enumerator
_initialDirectory = new PathPair(userPath, fullPath);
_searchPattern = searchPattern;
_searchOption = searchOption;
_includeFiles = (searchTarget & SearchTarget.Files) != 0;
_includeDirectories = (searchTarget & SearchTarget.Directories) != 0;
_translateResult = translateResult;
}
// Open the first enumerator so that any errors are propagated synchronously.
_firstEnumerator = Enumerate();
}