From 9d99fd9b82ee7fca11ce489443d0e534130192fb Mon Sep 17 00:00:00 2001
From: Lu Wang <coolwanglu@gmail.com>
Date: Thu, 29 Nov 2012 19:43:19 +0800
Subject: [PATCH] clean code

---
 src/util/path.cc            | 2 +-
 src/util/path.h             | 2 +-
 src/util/string_formatter.h | 3 ++-
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/util/path.cc b/src/util/path.cc
index c6f5804..a485fce 100644
--- a/src/util/path.cc
+++ b/src/util/path.cc
@@ -7,7 +7,7 @@ using std::string;
 
 namespace pdf2htmlEX {
 
-void create_directories(string path)
+void create_directories(const string & path)
 {
     if(path.empty()) return;
 
diff --git a/src/util/path.h b/src/util/path.h
index ddc9a4a..4f82a8e 100644
--- a/src/util/path.h
+++ b/src/util/path.h
@@ -12,7 +12,7 @@
 
 namespace pdf2htmlEX {
 
-void create_directories(std::string path);
+void create_directories(const std::string & path);
 
 bool is_truetype_suffix(const std::string & suffix);
 
diff --git a/src/util/string_formatter.h b/src/util/string_formatter.h
index a5dc08b..8d50df0 100644
--- a/src/util/string_formatter.h
+++ b/src/util/string_formatter.h
@@ -17,8 +17,9 @@ public:
     {
     public:
         guarded_pointer(string_formatter * sf) : sf(sf) { ++(sf->buf_cnt); }
+        guarded_pointer(const guarded_pointer & gp) : sf(gp.sf) { ++(sf->buf_cnt); }
         ~guarded_pointer(void) { --(sf->buf_cnt); }
-        operator char* () { return &(sf->buf.front()); }
+        operator char* () const { return &(sf->buf.front()); }
     private:
         string_formatter * sf;
     };