1 files changed, 89 insertions, 0 deletions

diff --git a/src/dutil/path2utl.cpp b/src/dutil/path2utl.cpp
new file mode 100644
index 00000000..8f5f03a1
--- /dev/null
+++ b/src/dutil/path2utl.cpp
@@ -0,0 +1,89 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+#include "precomp.h"
+
+
+DAPI_(HRESULT) PathCanonicalizePath(
+    __in_z LPCWSTR wzPath,
+    __deref_out_z LPWSTR* psczCanonicalized
+    )
+{
+    HRESULT hr = S_OK;
+    int cch = MAX_PATH + 1;
+
+    hr = StrAlloc(psczCanonicalized, cch);
+    ExitOnFailure(hr, "Failed to allocate string for the canonicalized path.");
+
+    if (::PathCanonicalizeW(*psczCanonicalized, wzPath))
+    {
+        hr = S_OK;
+    }
+    else
+    {
+        ExitFunctionWithLastError(hr);
+    }
+
+LExit:
+    return hr;
+}
+
+DAPI_(HRESULT) PathDirectoryContainsPath(
+    __in_z LPCWSTR wzDirectory,
+    __in_z LPCWSTR wzPath
+    )
+{
+    HRESULT hr = S_OK;
+    LPWSTR sczPath = NULL;
+    LPWSTR sczDirectory = NULL;
+    LPWSTR sczOriginalPath = NULL;
+    LPWSTR sczOriginalDirectory = NULL;
+
+    hr = PathCanonicalizePath(wzPath, &sczOriginalPath);
+    ExitOnFailure(hr, "Failed to canonicalize the path.");
+
+    hr = PathCanonicalizePath(wzDirectory, &sczOriginalDirectory);
+    ExitOnFailure(hr, "Failed to canonicalize the directory.");
+
+    if (!sczOriginalPath || !*sczOriginalPath)
+    {
+        ExitFunction1(hr = S_FALSE);
+    }
+    if (!sczOriginalDirectory || !*sczOriginalDirectory)
+    {
+        ExitFunction1(hr = S_FALSE);
+    }
+
+    sczPath = sczOriginalPath;
+    sczDirectory = sczOriginalDirectory;
+
+    for (; *sczDirectory;)
+    {
+        if (!*sczPath)
+        {
+            ExitFunction1(hr = S_FALSE);
+        }
+
+        if (CSTR_EQUAL != ::CompareStringW(LOCALE_NEUTRAL, NORM_IGNORECASE, sczDirectory, 1, sczPath, 1))
+        {
+            ExitFunction1(hr = S_FALSE);
+        }
+
+        ++sczDirectory;
+        ++sczPath;
+    }
+
+    --sczDirectory;
+    if (('\\' == *sczDirectory && *sczPath) || '\\' == *sczPath)
+    {
+        hr = S_OK;
+    }
+    else
+    {
+        hr = S_FALSE;
+    }
+
+LExit:
+    ReleaseStr(sczOriginalPath);
+    ReleaseStr(sczOriginalDirectory);
+    return hr;
+}