[PATCH 6/8] scrrun: Move code to new helper function get_file_name().

[Robert Wilhelm]

From: Robert Wilhelm

Signed-off-by: Robert Wilhelm 
---
 dlls/scrrun/filesystem.c | 42 ++++++++++++++++++++++++++++------------
 1 file changed, 30 insertions(+), 12 deletions(-)

diff --git a/dlls/scrrun/filesystem.c b/dlls/scrrun/filesystem.c
index 6ffebc0af12..197fe9f3625 100644
--- a/dlls/scrrun/filesystem.c
+++ b/dlls/scrrun/filesystem.c
@@ -3301,10 +3301,37 @@ static HRESULT WINAPI filesys_GetParentFolderName(IFileSystem3 *iface, BSTR Path
     return S_OK;
 }

+static HRESULT get_file_name(const WCHAR *path, int *start, int *end)
+{
+    int s,e;
+
+    if(!path)
+        return 0;
+
+    for(e=lstrlenW(path)-1; e>=0; e--)
+        if(path[e]!='/' && path[e]!='\')
+            break;
+
+    for(s=e; s>=0; s--)
+        if(path[s]=='/' || path[s]=='\')
+            break;
+
+    s++;
+
+    if(s>e || (s==0 && e==1 && path[1]==':')) {
+        return E_FAIL;
+    }
+
+    *start = s;
+    *end = e;
+
+    return S_OK;
+}
+
 static HRESULT WINAPI filesys_GetFileName(IFileSystem3 *iface, BSTR Path,
                                             BSTR *pbstrResult)
 {
-    int i, end;
+    int start=0, end=0;

TRACE("%p %s %p\n", iface, debugstr_w(Path), pbstrResult);

@@ -3316,21 +3343,12 @@ static HRESULT WINAPI filesys_GetFileName(IFileSystem3 *iface, BSTR Path,
         return S_OK;
     }

-    for(end=lstrlenW(Path)-1; end>=0; end--)
-        if(Path[end]!='/' && Path[end]!='\')
-            break;
-
-    for(i=end; i>=0; i--)
-        if(Path[i]=='/' || Path[i]=='\')
-            break;
-    i++;
-
-    if(i>end || (i==0 && end==1 && Path[1]==':')) {
+    if (FAILED(get_file_name( Path, &start, &end))) {
         *pbstrResult = NULL;
         return S_OK;
     }

-    *pbstrResult = SysAllocStringLen(Path+i, end-i+1);
+    *pbstrResult = SysAllocStringLen(Path+start, end-start+1);
     if(!*pbstrResult)
         return E_OUTOFMEMORY;
     return S_OK;