From 0eb1662a0eaf8eee680cab5b913fff3fcc9b8b2f Mon Sep 17 00:00:00 2001
From: Tannin <devnull@localhost>
Date: Mon, 5 May 2014 18:24:15 +0200
Subject: - very effective optimization to findfirstfile-calls - several
 configuration files are now only saved to disk if the content actually
 changed.   This should also get rid of a problem where plugins.txt was
 re-written immediately after starting the game   (causing a conflict with the
 game) - reduced "noise" from hook.dll - removed some debugging messages

---
 src/safewritefile.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'src/safewritefile.cpp')

diff --git a/src/safewritefile.cpp b/src/safewritefile.cpp
index 6df8c2b8..626413dd 100644
--- a/src/safewritefile.cpp
+++ b/src/safewritefile.cpp
@@ -46,3 +46,23 @@ void SafeWriteFile::commit() {
   m_TempFile.setAutoRemove(false);
   m_TempFile.close();
 }
+
+bool SafeWriteFile::commitIfDifferent(uint &inHash) {
+  uint newHash = hash();
+  if (newHash != inHash) {
+    commit();
+    inHash = newHash;
+    return true;
+  } else {
+    return false;
+  }
+}
+
+uint SafeWriteFile::hash()
+{
+  qint64 pos = m_TempFile.pos();
+  m_TempFile.seek(0);
+  QByteArray data = m_TempFile.readAll();
+  m_TempFile.seek(pos);
+  return qHash(data);
+}
-- 
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