| public static dirname ( string path, int levels = 1 ) : string | ||
| path | string | The full path. |
| levels | int | The number of parent directories to go up. Must be greater than zero. |
| return | string | |
public static string dirname(string path, int levels = 1)
{
if (string.IsNullOrEmpty(path))
{
return null;
}
if (levels != 1)
{
// added in php 7.0
throw new NotImplementedException();
}
int start = 0;
int end = path.Length - 1;
// advance start position beyond drive specifier:
if (path.Length >= 2 && path[1] == ':' && (path[0] >= 'a' && path[0] <= 'z' || path[0] >= 'A' && path[0] <= 'Z'))
{
start = 2;
if (path.Length == 2)
return path;
}
// strip slashes from the end:
while (end >= start && path[end].IsDirectorySeparator()) end--;
if (end < start)
return path.Substring(0, end + 1) + PathUtils.AltDirectorySeparator;
// strip file name:
while (end >= start && !path[end].IsDirectorySeparator()) end--;
if (end < start)
return path.Substring(0, end + 1) + '.';
// strip slashes from the end:
while (end >= start && path[end].IsDirectorySeparator()) end--;
if (end < start)
return path.Substring(0, end + 1) + PathUtils.AltDirectorySeparator;
return path.Substring(0, end + 1);
}
/// <summary>
/// Extracts part(s) from a specified path.
/// </summary>
/// <param name="path">The path to be parsed.</param>
/// <param name="options">Flags determining the result.</param>
/// <returns>
/// If <paramref name="options"/> is <see cref="PathInfoOptions.All"/> then returns array
/// keyed by <c>"dirname"</c>, <c>"basename"</c>, and <c>"extension"</c>. Otherwise,
/// it returns string value containing a single part of the path.
/// </returns>
public static PhpValue pathinfo(string path, PathInfoOptions options = PathInfoOptions.All)
{
// collect strings
string dirname = null, basename = null, extension = null, filename = null;
if ((options & PathInfoOptions.BaseName) != 0 ||
(options & PathInfoOptions.Extension) != 0 ||
(options & PathInfoOptions.FileName) != 0)
{
basename = PhpPath.basename(path);
}
if ((options & PathInfoOptions.DirName) != 0)
{
dirname = PhpPath.dirname(path);
}
if ((options & PathInfoOptions.Extension) != 0)
{
int last_dot = basename.LastIndexOf('.');
if (last_dot >= 0)
{
extension = basename.Substring(last_dot + 1);
}
}
if ((options & PathInfoOptions.FileName) != 0)
{
int last_dot = basename.LastIndexOf('.');
if (last_dot >= 0)
{
filename = basename.Substring(0, last_dot);
}
else
{
filename = basename;
}
}
// return requested value or all of them in an associative array
if (options == PathInfoOptions.All)
{
var result = new PhpArray(4);
result.Add("dirname", dirname);
result.Add("basename", basename);
result.Add("extension", extension);
result.Add("filename", filename);
return(PhpValue.Create(result));
}
if ((options & PathInfoOptions.DirName) != 0)
{
return(PhpValue.Create(dirname));
}
if ((options & PathInfoOptions.BaseName) != 0)
{
return(PhpValue.Create(basename));
}
if ((options & PathInfoOptions.Extension) != 0)
{
return(PhpValue.Create(extension));
}
if ((options & PathInfoOptions.FileName) != 0)
{
return(PhpValue.Create(filename));
}
return(PhpValue.Null);
}
