Nikolay Sivov : scrrun: Implement BuildPath method.

[Alexandre Julliard]

Module: wine
Branch: stable
Commit: 9d26384beb0a2f80a9b766a01e220013cece3899
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=9d26384beb0a2f80a9b766a01e220013cece3899

Author: Nikolay Sivov <nsivov at codeweavers.com>
Date:   Sun Nov 17 11:49:53 2013 +0400

scrrun: Implement BuildPath method.

(cherry picked from commit 70bb23a9acc6abb73005dc221c65c9c682a2d868)

---

 dlls/scrrun/filesystem.c |   57 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 54 insertions(+), 3 deletions(-)

diff --git a/dlls/scrrun/filesystem.c b/dlls/scrrun/filesystem.c
index 4f0b163..5b94e8f 100644
--- a/dlls/scrrun/filesystem.c
+++ b/dlls/scrrun/filesystem.c
@@ -713,11 +713,62 @@ static HRESULT WINAPI filesys_get_Drives(IFileSystem3 *iface, IDriveCollection *
 }
 
 static HRESULT WINAPI filesys_BuildPath(IFileSystem3 *iface, BSTR Path,
-                                            BSTR Name, BSTR *pbstrResult)
+                                            BSTR Name, BSTR *Result)
 {
-    FIXME("%p %s %s %p\n", iface, debugstr_w(Path), debugstr_w(Name), pbstrResult);
+    BSTR ret;
 
-    return E_NOTIMPL;
+    TRACE("%p %s %s %p\n", iface, debugstr_w(Path), debugstr_w(Name), Result);
+
+    if (!Result) return E_POINTER;
+
+    if (Path && Name)
+    {
+        int path_len = SysStringLen(Path), name_len = SysStringLen(Name);
+
+        /* if both parts have backslashes strip one from Path */
+        if (Path[path_len-1] == '\\' && Name[0] == '\\')
+        {
+            path_len -= 1;
+
+            ret = SysAllocStringLen(NULL, path_len + name_len);
+            if (ret)
+            {
+                strcpyW(ret, Path);
+                ret[path_len] = 0;
+                strcatW(ret, Name);
+            }
+        }
+        else if (Path[path_len-1] != '\\' && Name[0] != '\\')
+        {
+            static const WCHAR bsW[] = {'\\',0};
+            ret = SysAllocStringLen(NULL, path_len + name_len + 1);
+            if (ret)
+            {
+                strcpyW(ret, Path);
+                if (Path[path_len-1] != ':')
+                    strcatW(ret, bsW);
+                strcatW(ret, Name);
+            }
+        }
+        else
+        {
+            ret = SysAllocStringLen(NULL, path_len + name_len);
+            if (ret)
+            {
+                strcpyW(ret, Path);
+                strcatW(ret, Name);
+            }
+        }
+    }
+    else if (Path || Name)
+        ret = SysAllocString(Path ? Path : Name);
+    else
+        ret = SysAllocStringLen(NULL, 0);
+
+    if (!ret) return E_OUTOFMEMORY;
+    *Result = ret;
+
+    return S_OK;
 }
 
 static HRESULT WINAPI filesys_GetDriveName(IFileSystem3 *iface, BSTR Path,