working on rendering

tier1/utlstring.cpp

@@ -62,16 +62,83 @@ void CUtlString::AppendAt( size_t nPosition, const char *psz )
 
 void CUtlString::RemoveTail( size_t nCount )
 {
-
+	m_data.RemoveTail(nCount);
+	m_data[m_data.GetSize()-1] = 0;
 }
 void CUtlString::RemoveHead( size_t nCount )
 {
-
+	m_data.RemoveHead(nCount);
 }
 void CUtlString::RemoveAt( size_t nPosition, size_t nCount )
 {
 
 }
+CUtlString CUtlString::GetFileName()
+{
+	CUtlString szFileName = GetString();
+
+	char *pLast = &m_data[GetLenght()-1];	
+	while (pLast != m_data.GetData())
+	{
+		if (*pLast=='/')
+			break;			
+		pLast--;
+	}
+
+	return pLast;
+}
+CUtlString CUtlString::GetDirectory()
+{
+	if (GetLenght() == 0)
+		return NULL;
+	size_t iNumDeleted = 0;
+	char *pLast = &m_data[GetLenght()-1];
+	CUtlString szDirectory = GetString();
+	while (pLast != m_data.GetData())
+	{
+		if (*pLast=='/')
+		{
+			iNumDeleted++;
+			break;
+		}
+		pLast--;
+		iNumDeleted++;
+	}
+
+	szDirectory.RemoveTail(iNumDeleted);
+
+	return szDirectory;
+}
+CUtlString CUtlString::RemoveHeadFile()
+{
+	size_t iLenght = GetLenght();
+	size_t iNumDeleted = 0;
+	char *pc = GetString();
+	CUtlString szDirectory = pc;
+
+	if (GetLenght() == 0)
+		return NULL;
+	while ( iNumDeleted < iLenght )
+	{
+		if (*pc == '/')
+			goto remove_slashes;
+		pc++;
+		iNumDeleted++;
+	}
+	return NULL;
+remove_slashes:
+	while ( iNumDeleted < iLenght )
+	{
+		if (*pc != '/')
+		{
+			szDirectory.RemoveHead(iNumDeleted);
+			return szDirectory;
+		}
+		pc++;
+		iNumDeleted++;
+	}
+	return NULL;
+}
 
 char *CUtlString::GetString( void )
 {