// $Id: PathUtility.cs 64 2008-05-06 18:29:47Z nvivo $
using System;
using System.Reflection;
using System.Collections.Generic;
using System.IO;
using System.Text;
namespace DBLGen
{
public static class PathUtility
{
///
/// Returns the path relative to the entry assembly, or the absolute path if the relative cannot be created.
///
public static string GetRelativePath(string absolutePath)
{
string entryPath = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
return GetRelativePath(entryPath, absolutePath);
}
///
/// Returns the path relative to a base directory, or the absolute path if the relative cannot be created.
///
public static string GetRelativePath(string baseDirectoryPath, string absolutePath)
{
if (baseDirectoryPath == null)
throw new ArgumentNullException("basePath");
absolutePath = Path.GetFullPath(absolutePath);
if (baseDirectoryPath.EndsWith("\\"))
baseDirectoryPath = baseDirectoryPath.Substring(0, baseDirectoryPath.Length - 1);
if (absolutePath.EndsWith("\\"))
absolutePath = absolutePath.Substring(0, absolutePath.Length - 1);
// split path in parts
string[] baseParts = baseDirectoryPath.Split(Path.DirectorySeparatorChar);
string[] pathParts = absolutePath.Split(Path.DirectorySeparatorChar);
// find out the common parts between them
int baseLength = baseParts.Length;
int common = 0;
for (int i = 0; i < baseLength; i++)
{
if (String.Compare(baseParts[i], pathParts[i], true) == 0)
common++;
else
break;
}
// if there is no common parts, return the absolute path
if (common == 0)
return Path.GetFullPath(absolutePath);
// otherwise, continue
StringBuilder sbPath = new StringBuilder(absolutePath.Length);
// if there are still parts in the base path that are not common, add ".."
if (common < baseLength)
{
for (int i = common; i < baseLength; i++)
{
sbPath.Append("..");
sbPath.Append(Path.DirectorySeparatorChar);
}
}
// then add the rest of the path
int lastPathIndex = pathParts.Length - 1;
for (int i = common; i <= lastPathIndex; i++)
{
sbPath.Append(pathParts[i]);
if (i != lastPathIndex)
sbPath.Append(Path.DirectorySeparatorChar);
}
return sbPath.ToString();
}
public static string GetAbsolutePath(string path)
{
string entryPath = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
return GetAbsolutePath(entryPath, path);
}
public static string GetAbsolutePath(string baseDirectoryPath, string path)
{
if (baseDirectoryPath == null)
throw new ArgumentNullException(baseDirectoryPath);
if (String.IsNullOrEmpty(path))
return path;
if (Path.IsPathRooted(path))
return path;
string absolutePath = Path.Combine(baseDirectoryPath, path);
return absolutePath;
}
}
}