fix win32 UNC path handling (#183)

* Don't normalize UNC prefix

* Don't try to add unc prefix for path with unc prefix

* Properly change forward slashes to backward slashes in Win32 MakePlatformPath

* release notes

.github/workflows/create-release.yml

@@ -133,8 +133,7 @@ jobs:
         release_name: Release ${{ env.RELEASE_VERSION }}
         body: |
           # Changes in this Release
-          - **CHANGED API** Added `GetParentPath()` to `Storage_API`
-          - **FIX** EnsureParentPath now handles Windows path with backslashes properly
+          - **FIX** Properly handle UNC paths
         draft: false
         prerelease: false
         files: "*-x64.zip"

cmd/main.c

@@ -241,6 +241,10 @@ static char* NormalizePath(const char* path)
     char* normalized_path = Longtail_Strdup(path);
     size_t wi = 0;
     size_t ri = 0;
+    if (normalized_path[0] == '\\' && normalized_path[1] == '\\' && normalized_path[2] == '?' && normalized_path[3] == '\\')
+    {
+        ri += 4;
+    }
     while (path[ri])
     {
         switch (path[ri])

lib/longtail_platform.c

@@ -129,6 +129,11 @@ static const wchar_t* MakeLongPath(const wchar_t* path)
         // Don't add long path prefix if we don't specify a drive
         return path;
     }
+    if (path[0] == '\\' && path[1] == '\\' && path[2] == '?' && path[3] == '\\')
+    {
+        // Don't add long path prefix if we aleady have an UNC path
+        return path;
+    }
     size_t path_len = wcslen(path);
     if (path_len < MAX_PATH)
     {
@@ -374,7 +379,7 @@ static wchar_t* MakePlatformPath(const char* path)
     wchar_t* p = r;
     while (*p)
     {
-        *r = ((*r) == '/') ? '\\' : (*r);
+        *p = ((*p) == '/') ? '\\' : (*p);
         ++p;
     }
     return r;