From 9a2d203c0d95e51ea02e3e62fef6289973777e84 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Mr=C3=A1zek?= <peterix@gmail.com>
Date: Wed, 27 Sep 2017 12:45:07 +0200
Subject: [PATCH] GH-1993 swap min/max memory settings when they are the wrong
 way around

---
 api/logic/minecraft/MinecraftInstance.cpp  | 14 +++++++++--
 application/MultiMC.cpp                    | 15 ++++++++++--
 application/pages/InstanceSettingsPage.cpp | 28 ++++++++++++++++++----
 application/pages/global/JavaPage.cpp      | 28 ++++++++++++++++++----
 4 files changed, 73 insertions(+), 12 deletions(-)

diff --git a/api/logic/minecraft/MinecraftInstance.cpp b/api/logic/minecraft/MinecraftInstance.cpp
index 4ff85c27b..14de2f5f8 100644
--- a/api/logic/minecraft/MinecraftInstance.cpp
+++ b/api/logic/minecraft/MinecraftInstance.cpp
@@ -305,8 +305,18 @@ QStringList MinecraftInstance::javaArguments() const
 					"minecraft.exe.heapdump");
 #endif
 
-	args << QString("-Xms%1m").arg(settings()->get("MinMemAlloc").toInt());
-	args << QString("-Xmx%1m").arg(settings()->get("MaxMemAlloc").toInt());
+	int min = settings()->get("MinMemAlloc").toInt();
+	int max = settings()->get("MaxMemAlloc").toInt();
+	if(min < max)
+	{
+		args << QString("-Xms%1m").arg(min);
+		args << QString("-Xmx%1m").arg(max);
+	}
+	else
+	{
+		args << QString("-Xms%1m").arg(max);
+		args << QString("-Xmx%1m").arg(min);
+	}
 
 	// No PermGen in newer java.
 	JavaVersion javaVersion = getJavaVersion();
diff --git a/application/MultiMC.cpp b/application/MultiMC.cpp
index fd004b05a..feaf88a74 100644
--- a/application/MultiMC.cpp
+++ b/application/MultiMC.cpp
@@ -1125,8 +1125,19 @@ MainWindow* MultiMC::showMainWindow(bool minimized)
 		 * cd4 = CPU architecture
 		 */
 		QVariantMap customValues;
-		customValues["cm1"] = m_settings->get("MinMemAlloc");
-		customValues["cm2"] = m_settings->get("MaxMemAlloc");
+		int min = m_settings->get("MinMemAlloc").toInt();
+		int max = m_settings->get("MaxMemAlloc").toInt();
+		if(min < max)
+		{
+			customValues["cm1"] = min;
+			customValues["cm2"] = max;
+		}
+		else
+		{
+			customValues["cm1"] = max;
+			customValues["cm2"] = min;
+		}
+
 		constexpr uint64_t Mega = 1024ull * 1024ull;
 		int ramSize = int(Sys::getSystemRam() / Mega);
 		qDebug() << "RAM size is" << ramSize << "MB";
diff --git a/application/pages/InstanceSettingsPage.cpp b/application/pages/InstanceSettingsPage.cpp
index 22dbd81f5..90c2e92ed 100644
--- a/application/pages/InstanceSettingsPage.cpp
+++ b/application/pages/InstanceSettingsPage.cpp
@@ -80,8 +80,18 @@ void InstanceSettingsPage::applySettings()
 	m_settings->set("OverrideMemory", memory);
 	if (memory)
 	{
-		m_settings->set("MinMemAlloc", ui->minMemSpinBox->value());
-		m_settings->set("MaxMemAlloc", ui->maxMemSpinBox->value());
+		int min = ui->minMemSpinBox->value();
+		int max = ui->maxMemSpinBox->value();
+		if(min < max)
+		{
+			m_settings->set("MinMemAlloc", min);
+			m_settings->set("MaxMemAlloc", max);
+		}
+		else
+		{
+			m_settings->set("MinMemAlloc", max);
+			m_settings->set("MaxMemAlloc", min);
+		}
 		m_settings->set("PermGen", ui->permGenSpinBox->value());
 	}
 	else
@@ -152,8 +162,18 @@ void InstanceSettingsPage::loadSettings()
 
 	// Memory
 	ui->memoryGroupBox->setChecked(m_settings->get("OverrideMemory").toBool());
-	ui->minMemSpinBox->setValue(m_settings->get("MinMemAlloc").toInt());
-	ui->maxMemSpinBox->setValue(m_settings->get("MaxMemAlloc").toInt());
+	int min = m_settings->get("MinMemAlloc").toInt();
+	int max = m_settings->get("MaxMemAlloc").toInt();
+	if(min < max)
+	{
+		ui->minMemSpinBox->setValue(min);
+		ui->maxMemSpinBox->setValue(max);
+	}
+	else
+	{
+		ui->minMemSpinBox->setValue(max);
+		ui->maxMemSpinBox->setValue(min);
+	}
 	ui->permGenSpinBox->setValue(m_settings->get("PermGen").toInt());
 
 	// Java Settings
diff --git a/application/pages/global/JavaPage.cpp b/application/pages/global/JavaPage.cpp
index f43fd6412..81c6f7a74 100644
--- a/application/pages/global/JavaPage.cpp
+++ b/application/pages/global/JavaPage.cpp
@@ -62,8 +62,18 @@ void JavaPage::applySettings()
 	auto s = MMC->settings();
 
 	// Memory
-	s->set("MinMemAlloc", ui->minMemSpinBox->value());
-	s->set("MaxMemAlloc", ui->maxMemSpinBox->value());
+	int min = ui->minMemSpinBox->value();
+	int max = ui->maxMemSpinBox->value();
+	if(min < max)
+	{
+		s->set("MinMemAlloc", min);
+		s->set("MaxMemAlloc", max);
+	}
+	else
+	{
+		s->set("MinMemAlloc", max);
+		s->set("MaxMemAlloc", min);
+	}
 	s->set("PermGen", ui->permGenSpinBox->value());
 
 	// Java Settings
@@ -80,8 +90,18 @@ void JavaPage::loadSettings()
 {
 	auto s = MMC->settings();
 	// Memory
-	ui->minMemSpinBox->setValue(s->get("MinMemAlloc").toInt());
-	ui->maxMemSpinBox->setValue(s->get("MaxMemAlloc").toInt());
+	int min = s->get("MinMemAlloc").toInt();
+	int max = s->get("MaxMemAlloc").toInt();
+	if(min < max)
+	{
+		ui->minMemSpinBox->setValue(min);
+		ui->maxMemSpinBox->setValue(max);
+	}
+	else
+	{
+		ui->minMemSpinBox->setValue(max);
+		ui->maxMemSpinBox->setValue(min);
+	}
 	ui->permGenSpinBox->setValue(s->get("PermGen").toInt());
 
 	// Java Settings