From 7b9829eda920cc8f3bc069a0090608ea2785b541 Mon Sep 17 00:00:00 2001
From: harry <hrosen2016@gmail.com>
Date: Sat, 17 Feb 2024 08:42:12 -0500
Subject: [PATCH] Changed JS log file save function so that it doesn't truncate
 the current temp file.

---
 src/drivers/Qt/QtScriptManager.cpp | 20 +++++++++++++++-----
 src/drivers/Qt/QtScriptManager.h   | 20 +-------------------
 2 files changed, 16 insertions(+), 24 deletions(-)

diff --git a/src/drivers/Qt/QtScriptManager.cpp b/src/drivers/Qt/QtScriptManager.cpp
index 34533633..34a9d5bf 100644
--- a/src/drivers/Qt/QtScriptManager.cpp
+++ b/src/drivers/Qt/QtScriptManager.cpp
@@ -2561,11 +2561,21 @@ void QScriptDialog_t::saveLog(bool openFileBrowser)
 		}
 		printf("Saving Log File: %s\n", logSavePath.toLocal8Bit().data());
 		FCEU_WRAPPER_LOCK();
-		flushLog();
-		if ( logFile->copy( logSavePath ) )
 		{
-			// Log file needs to be reopened on a successful copy
-			logFile->reopen();
+			char buffer[4096];
+			flushLog();
+			QFile saveFile( logSavePath );
+			if (saveFile.open(QIODeviceBase::ReadWrite))
+			{
+				logFile->seek(0);
+				qint64 bytesRead = logFile->read(buffer, sizeof(buffer));
+				while (bytesRead > 0)
+				{
+					saveFile.write(buffer, bytesRead);
+
+					bytesRead = logFile->read(buffer, sizeof(buffer));
+				}
+			}
 		}
 		FCEU_WRAPPER_UNLOCK();
 	}
@@ -2957,7 +2967,7 @@ void QScriptDialog_t::resetLog()
 		delete logFile;
 		logFile = nullptr;
 	}
-	logFile = new QScriptLogFile(this);
+	logFile = new QTemporaryFile(this);
 	logFile->setAutoRemove(true);
 	logFile->setFileTemplate(QDir::tempPath() + QString("/fceux_js_XXXXXX.log"));
 	logFile->open();
diff --git a/src/drivers/Qt/QtScriptManager.h b/src/drivers/Qt/QtScriptManager.h
index f94e1bdf..66638bf1 100644
--- a/src/drivers/Qt/QtScriptManager.h
+++ b/src/drivers/Qt/QtScriptManager.h
@@ -726,24 +726,6 @@ public:
 	QMap<QString, JsPropertyItem*> childMap;
 };
 
-class QScriptLogFile : public QTemporaryFile
-{
-	Q_OBJECT
-
-public:
-	QScriptLogFile(QObject* parent = nullptr)
-		: QTemporaryFile(parent)
-	{
-	}
-
-	~QScriptLogFile(void){}
-
-	void reopen()
-	{
-		open(QIODeviceBase::Append | QIODeviceBase::ReadWrite);
-	}
-};
-
 class QScriptDialog_t : public QDialog
 {
 	Q_OBJECT
@@ -764,7 +746,7 @@ protected:
 	QMenuBar* buildMenuBar();
 
 	QMenuBar* menuBar;
-	QScriptLogFile *logFile = nullptr;
+	QTemporaryFile *logFile = nullptr;
 	QTimer *periodicTimer;
 	QLineEdit *scriptPath;
 	QLineEdit *scriptArgs;