/// <summary>
/// Constructor
/// </summary>
/// <param name="h">Find handle returned by FindFirstFile.</param>
/// <param name="p">Path corresponding to find handle.</param>
public SearchInfo(Win32.SafeFindHandle h, string p)
{
Handle = h;
Path = p;
}
/// <summary>
/// Get an enumerator that returns all of the files that match the wildcards that
/// are in any of the directories to be searched.
/// </summary>
/// <returns>An IEnumerable that returns all matching files one by one.</returns>
/// <remarks>The enumerator that is returned finds files using a lazy algorithm that
/// searches directories incrementally as matches are consumed.</remarks>
public IEnumerable <FileInfo> Matches()
{
foreach (string rootPath in m_paths)
{
string path = rootPath.Trim();
// we "recurse" into a new directory by jumping to this spot
top:
// check security - ensure that caller has rights to read this directory
new FileIOPermission(FileIOPermissionAccess.PathDiscovery, Path.Combine(path, ".")).Demand();
// now that security is checked, go read the directory
Win32.FindData findData = new Win32.FindData();
Win32.SafeFindHandle handle = Win32.SafeNativeMethods.FindFirstFile(Path.Combine(path, "*"), findData);
m_scopes.Push(new SearchInfo(handle, path));
bool restart = false;
// we "return" from a sub-directory by jumping to this spot
restart:
if (!handle.IsInvalid)
{
do
{
// if we restarted the loop (unwound a recursion), fetch the next match
if (restart)
{
restart = false;
continue;
}
// don't match . or ..
if (findData.fileName.Equals(@".") || findData.fileName.Equals(@".."))
{
continue;
}
if ((findData.fileAttributes & (int)FileAttributes.Directory) != 0)
{
if (m_includeSubDirs)
{
// it's a directory - recurse into it
path = Path.Combine(path, findData.fileName);
goto top;
}
}
else
{
// it's a file, see if any of the filespecs matches it
foreach (Regex fileSpec in m_fileSpecs)
{
// if this spec matches, return this file's info
if (fileSpec.IsMatch(findData.fileName))
{
yield return(new FileInfo(Path.Combine(path, findData.fileName)));
}
}
}
} while (Win32.SafeNativeMethods.FindNextFile(handle, findData));
// close this find handle
handle.Close();
// unwind the stack - are we still in a recursion?
m_scopes.Pop();
if (m_scopes.Count > 0)
{
SearchInfo si = m_scopes.Peek();
handle = si.Handle;
path = si.Path;
restart = true;
goto restart;
}
}
}
}
/// <summary>
/// Get an enumerator that returns all of the files that match the wildcards that
/// are in any of the directories to be searched.
/// </summary>
/// <returns>An IEnumerable that returns all matching files one by one.</returns>
/// <remarks>The enumerator that is returned finds files using a lazy algorithm that
/// searches directories incrementally as matches are consumed.</remarks>
public IEnumerable<FileInfo> Matches()
{
foreach (string rootPath in m_paths)
{
string path = rootPath.Trim();
// we "recurse" into a new directory by jumping to this spot
top:
Win32.FindData findData = new Win32.FindData();
Win32.SafeFindHandle handle = new Win32.SafeFindHandle(
Win32.SafeNativeMethods.FindFirstFile(Path.Combine(path, "*"), findData)
);
m_scopes.Push(new SearchInfo(handle, path));
bool restart = false;
// we "return" from a sub-directory by jumping to this spot
restart:
if (!handle.IsInvalid)
{
do
{
// if we restarted the loop (unwound a recursion), fetch the next match
if (restart)
{
restart = false;
continue;
}
// don't match . or ..
if (findData.fileName.Equals(@".") || findData.fileName.Equals(@".."))
continue;
if ((findData.fileAttributes & (int)FileAttributes.Directory) != 0)
{
if (m_includeSubDirs)
{
// it's a directory - recurse into it
path = Path.Combine(path, findData.fileName);
goto top;
}
}
else
{
// it's a file, see if any of the filespecs matches it
foreach (Regex fileSpec in m_fileSpecs)
{
// if this spec matches, return this file's info
if (fileSpec.IsMatch(findData.fileName))
yield return new FileInfo(Path.Combine(path, findData.fileName));
}
}
} while (Win32.SafeNativeMethods.FindNextFile(handle.DangerousGetHandle(), findData));
// close this find handle
handle.Close();
// unwind the stack - are we still in a recursion?
m_scopes.Pop();
if (m_scopes.Count > 0)
{
SearchInfo si = m_scopes.Peek();
handle = si.Handle;
path = si.Path;
restart = true;
goto restart;
}
}
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="h">Find handle returned by FindFirstFile.</param>
/// <param name="p">Path corresponding to find handle.</param>
public SearchInfo(Win32.SafeFindHandle h, string p)
{
Handle = h;
Path = p;
}
