From cbf40e9b90b38abf25c3ebfeb7488c52b30170b9 Mon Sep 17 00:00:00 2001
From: Nestal Wan <me@nestal.net>
Date: Tue, 5 Jun 2012 00:59:14 +0800
Subject: [PATCH] fixed uninitialized change stamp

---
 grive/src/main.cc           |  8 ++++----
 libgrive/src/drive/Drive.cc | 15 +++++++++------
 libgrive/src/drive/State.cc |  3 ++-
 3 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/grive/src/main.cc b/grive/src/main.cc
index bdb127f..0ad12e3 100644
--- a/grive/src/main.cc
+++ b/grive/src/main.cc
@@ -160,10 +160,10 @@ int main( int argc, char **argv )
 		OAuth2 token( refresh_token, client_id, client_secret ) ;
 		Drive drive( token, options ) ;
 
-// 		drive.Update() ;
-// 		drive.SaveState() ;
-// 		
-// 		config.Save() ;
+		drive.Update() ;
+		drive.SaveState() ;
+		
+		config.Save() ;
 	}
 	catch ( gr::Exception& e )
 	{
diff --git a/libgrive/src/drive/Drive.cc b/libgrive/src/drive/Drive.cc
index e54d6a7..a3270ab 100644
--- a/libgrive/src/drive/Drive.cc
+++ b/libgrive/src/drive/Drive.cc
@@ -91,12 +91,15 @@ Drive::Drive( OAuth2& auth, const Json& options ) :
 	} while ( feed.GetNext( &http, m_http_hdr ) ) ;
 
 	// pull the changes feed
-	boost::format changes_uri( "https://docs.google.com/feeds/default/private/changes?start-index=%1%" ) ;
-	http::ResponseLog log2( "changes-", ".xml", &xrsp ) ;
-	http.Get( (changes_uri%(prev_stamp+1)).str(), &log2, m_http_hdr ) ;
-	
-	Feed changes( xrsp.Response() ) ;
-	std::for_each( changes.begin(), changes.end(), boost::bind( &Drive::FromChange, this, _1 ) ) ;
+	if ( prev_stamp != -1 )
+	{
+		boost::format changes_uri( "https://docs.google.com/feeds/default/private/changes?start-index=%1%" ) ;
+		http::ResponseLog log2( "changes-", ".xml", &xrsp ) ;
+		http.Get( (changes_uri%(prev_stamp+1)).str(), &log2, m_http_hdr ) ;
+		
+		Feed changes( xrsp.Response() ) ;
+		std::for_each( changes.begin(), changes.end(), boost::bind( &Drive::FromChange, this, _1 ) ) ;
+	}
 }
 
 void Drive::FromRemote( const Entry& entry )
diff --git a/libgrive/src/drive/State.cc b/libgrive/src/drive/State.cc
index 0939302..a6ff6b9 100644
--- a/libgrive/src/drive/State.cc
+++ b/libgrive/src/drive/State.cc
@@ -39,7 +39,8 @@
 
 namespace gr {
 
-State::State( const fs::path& filename, const Json& options )
+State::State( const fs::path& filename, const Json& options ) :
+	m_cstamp( -1 )
 {
 	Read( filename ) ;