Fix (correct) warning about potentially uninitialized variables.

[wxWidgets.git] / src / common / filename.cpp

diff --git a/src/common/filename.cpp b/src/common/filename.cpp
index 307018d906e7cb0c1af4d1318aac11d3db62b1b9..4b0278f2c355a0cfd132ecf55c87f0a0246f281f 100644 (file)
--- a/src/common/filename.cpp
+++ b/src/common/filename.cpp
@@ -135,6 +135,7 @@
 #endif
 
 #ifdef __EMX__
+#include <os2.h>
 #define MAX_PATH _MAX_PATH
 #endif
 
@@ -847,6 +848,18 @@ bool wxFileName::Normalize(int flags,
                            const wxString& cwd,
                            wxPathFormat format)
 {
+    // deal with env vars renaming first as this may seriously change the path
+    if ( flags & wxPATH_NORM_ENV_VARS )
+    {
+        wxString pathOrig = GetFullPath(format);
+        wxString path = wxExpandEnvVars(pathOrig);
+        if ( path != pathOrig )
+        {
+            Assign(path);
+        }
+    }
+
+
     // the existing path components
     wxArrayString dirs = GetDirs();
 
@@ -939,11 +952,6 @@ bool wxFileName::Normalize(int flags,
             }
         }
 
-        if ( flags & wxPATH_NORM_ENV_VARS )
-        {
-            dir = wxExpandEnvVars(dir);
-        }
-
         if ( (flags & wxPATH_NORM_CASE) && !IsCaseSensitive(format) )
         {
             dir.MakeLower();
@@ -1176,19 +1184,44 @@ bool wxFileName::IsPathSeparator(wxChar ch, wxPathFormat format)
 // path components manipulation
 // ----------------------------------------------------------------------------
 
+/* static */ bool wxFileName::IsValidDirComponent(const wxString& dir)
+{
+    if ( dir.empty() )
+    {
+        wxFAIL_MSG( _T("empty directory passed to wxFileName::InsertDir()") );
+
+        return false;
+    }
+
+    const size_t len = dir.length();
+    for ( size_t n = 0; n < len; n++ )
+    {
+        if ( dir[n] == GetVolumeSeparator() || IsPathSeparator(dir[n]) )
+        {
+            wxFAIL_MSG( _T("invalid directory component in wxFileName") );
+
+            return false;
+        }
+    }
+
+    return true;
+}
+
 void wxFileName::AppendDir( const wxString &dir )
 {
-    m_dirs.Add( dir );
+    if ( IsValidDirComponent(dir) )
+        m_dirs.Add( dir );
 }
 
 void wxFileName::PrependDir( const wxString &dir )
 {
-    m_dirs.Insert( dir, 0 );
+    InsertDir(0, dir);
 }
 
 void wxFileName::InsertDir( int before, const wxString &dir )
 {
-    m_dirs.Insert( dir, before );
+    if ( IsValidDirComponent(dir) )
+        m_dirs.Insert( dir, before );
 }
 
 void wxFileName::RemoveDir( int pos )
@@ -1237,7 +1270,7 @@ wxString wxFileName::GetPath( int flags, wxPathFormat format ) const
             break;
 
         case wxPATH_DOS:
-            if (!m_relative)
+            if ( !m_relative )
                 fullpath += wxFILE_SEP_PATH_DOS;
             break;
 
@@ -1248,9 +1281,10 @@ wxString wxFileName::GetPath( int flags, wxPathFormat format ) const
         case wxPATH_UNIX:
             if ( !m_relative )
             {
-                // normally the absolute file names starts with a slash with
-                // one exception: file names like "~/foo.bar" don't have it
-                if ( m_dirs.IsEmpty() || m_dirs[0u] != _T('~') )
+                // normally the absolute file names start with a slash
+                // with one exception: the ones like "~/foo.bar" don't
+                // have it
+                if ( m_dirs[0u] != _T('~') )
                 {
                     fullpath += wxFILE_SEP_PATH_UNIX;
                 }
@@ -1259,64 +1293,67 @@ wxString wxFileName::GetPath( int flags, wxPathFormat format ) const
 
         case wxPATH_VMS:
             // no leading character here but use this place to unset
-            // wxPATH_GET_SEPARATOR flag: under VMS it doesn't make sense as,
-            // if I understand correctly, there should never be a dot before
-            // the closing bracket
+            // wxPATH_GET_SEPARATOR flag: under VMS it doesn't make sense
+            // as, if I understand correctly, there should never be a dot
+            // before the closing bracket
             flags &= ~wxPATH_GET_SEPARATOR;
     }
 
+    if ( m_dirs.empty() )
+    {
+        // there is nothing more
+        return fullpath;
+    }
+
     // then concatenate all the path components using the path separator
-    size_t dirCount = m_dirs.GetCount();
-    if ( dirCount )
+    if ( format == wxPATH_VMS )
     {
-        if ( format == wxPATH_VMS )
-        {
-            fullpath += wxT('[');
-        }
+        fullpath += wxT('[');
+    }
 
-        for ( size_t i = 0; i < dirCount; i++ )
+    const size_t dirCount = m_dirs.GetCount();
+    for ( size_t i = 0; i < dirCount; i++ )
+    {
+        switch (format)
         {
-            switch (format)
-            {
-                case wxPATH_MAC:
-                    if ( m_dirs[i] == wxT(".") )
-                    {
-                        // skip appending ':', this shouldn't be done in this
-                        // case as "::" is interpreted as ".." under Unix
-                        continue;
-                    }
-
-                    // convert back from ".." to nothing
-                    if ( m_dirs[i] != wxT("..") )
-                         fullpath += m_dirs[i];
-                    break;
+            case wxPATH_MAC:
+                if ( m_dirs[i] == wxT(".") )
+                {
+                    // skip appending ':', this shouldn't be done in this
+                    // case as "::" is interpreted as ".." under Unix
+                    continue;
+                }
 
-                default:
-                    wxFAIL_MSG( wxT("Unexpected path format") );
-                    // still fall through
+                // convert back from ".." to nothing
+                if ( m_dirs[i] != wxT("..") )
+                     fullpath += m_dirs[i];
+                break;
 
-                case wxPATH_DOS:
-                case wxPATH_UNIX:
-                    fullpath += m_dirs[i];
-                    break;
+            default:
+                wxFAIL_MSG( wxT("Unexpected path format") );
+                // still fall through
 
-                case wxPATH_VMS:
-                    // TODO: What to do with ".." under VMS
+            case wxPATH_DOS:
+            case wxPATH_UNIX:
+                fullpath += m_dirs[i];
+                break;
 
-                    // convert back from ".." to nothing
-                    if ( m_dirs[i] != wxT("..") )
-                        fullpath += m_dirs[i];
-                    break;
-            }
+            case wxPATH_VMS:
+                // TODO: What to do with ".." under VMS
 
-            if ( (flags & wxPATH_GET_SEPARATOR) || (i != dirCount - 1) )
-                fullpath += GetPathSeparator(format);
+                // convert back from ".." to nothing
+                if ( m_dirs[i] != wxT("..") )
+                    fullpath += m_dirs[i];
+                break;
         }
 
-        if ( format == wxPATH_VMS )
-        {
-            fullpath += wxT(']');
-        }
+        if ( (flags & wxPATH_GET_SEPARATOR) || (i != dirCount - 1) )
+            fullpath += GetPathSeparator(format);
+    }
+
+    if ( format == wxPATH_VMS )
+    {
+        fullpath += wxT(']');
     }
 
     return fullpath;