finish pak opening support

source/common.h

@@ -4,18 +4,20 @@
 #include <QtGlobal>
 
 #include <QCoreApplication>
+#include <QDebug>
 
 #include <algorithm>
 #include <array>
 #include <filesystem>
 #include <fstream>
 #include <ios>
-#include <iostream>
 #include <istream>
 #include <iterator>
+#include <memory>
 #include <stdexcept>
 #include <string>
 #include <utility>
+#include <variant>
 
 static inline QString trMain(char const *sourceText,
                              char const *disambiguation = nullptr,
@@ -44,33 +46,26 @@ static inline std::array<char, N> readBytes(std::istream &st) {
 	return std::move(b);
 }
 
-template<typename It>
-static inline std::string escapeText(It begin, It end) {
-	std::stringstream out;
-	out << std::hex << std::uppercase;
-	for(auto it = begin; it != end; ++it) {
-		unsigned char c = *it;
-		switch(c) {
-			case '"':  out << "\\\""; break;
-			case '\0': out << "\\0";  break;
-			case '\\': out << "\\\\"; break;
-			case '\a': out << "\\a";  break;
-			case '\b': out << "\\b";  break;
-			case '\f': out << "\\f";  break;
-			case '\n': out << "\\n";  break;
-			case '\r': out << "\\r";  break;
-			case '\t': out << "\\t";  break;
-			case '\v': out << "\\v";  break;
-			default:
-				if(c >= ' ' && c <= '~') {
-					out << c;
-				} else {
-					out << "\\x" << int(c);
-				}
-				break;
-		}
-	}
-	return out.str();
+static inline QDebug operator<<(QDebug debug, std::string const &t) {
+	debug << QString::fromStdString(t);
+	return debug;
+}
+
+template<typename T>
+static inline QDebug operator<<(QDebug debug, std::unique_ptr<T> const &t) {
+	debug << *t;
+	return debug;
+}
+
+template<typename T0, typename... Ts>
+static inline QDebug operator <<(QDebug debug,
+                                 std::variant<T0, Ts...> const &t) {
+	std::visit([&](auto &&arg) {debug << arg;}, t);
+	return debug;
+}
+
+static inline std::ifstream openReadBin(std::filesystem::path path) {
+	return std::ifstream{path, std::ios_base::in | std::ios_base::binary};
 }
 
 // EOF

source/quam/main.cc

@@ -42,14 +42,17 @@ static int modeText(int argc, char *argv[]) {
 	par.process(appl);
 
 	auto fileName = par.value(fileNameOpt).toStdString();
-	std::ifstream st{fileName, std::ios_base::in | std::ios_base::binary};
-	readPakFile(st);
+
+	auto st  = openReadBin(fileName);
+	auto pak = readPak(st);
+
+	qDebug() << pak;
 
 	return 0;
 }
 
 int main(int argc, char *argv[]) {
-	if(argc == 0) {
+	if(argc <= 1) {
 		return modeGui(argc, argv);
 	} else {
 		return modeText(argc, argv);

source/quam/main_window.cc

@@ -2,14 +2,53 @@
 #include "quam/main_window.h"
 #include "quam/pak.h"
 
-MainWindow::MainWindow(QWidget *parent) :
-	QMainWindow{parent},
-	Ui::MainWindow{}
-{
-	setupUi(this);
+static void setListToDir(QListWidget &list, PakDir const &dir) {
+	list.clear();
+	for(auto const &kv : dir) {
+		auto const &name = kv.first;
+		auto const &node = kv.second;
+		auto var  = QVariant::fromValue(node);
+		auto item = new QListWidgetItem{&list};
+		item->setText(QString::fromStdString(name));
+		item->setData(Qt::UserRole, var);
+		if(std::holds_alternative<PakDir>(node)) {
+			item->setIcon(QIcon::fromTheme("folder"));
+		} else {
+			item->setIcon(QIcon::fromTheme("text-x-generic"));
+		}
+		list.addItem(item);
+	}
 }
 
-void MainWindow::openTest() {
+MainWindow::MainWindow(QWidget *parent) :
+	QMainWindow{parent},
+	Ui::MainWindow{},
+	m_errors{}
+{
+	setupUi(this);
+
+	actionOpen->setShortcut(QKeySequence(QKeySequence::Open));
+	actionQuit->setShortcut(QKeySequence(QKeySequence::Quit));
+}
+
+void MainWindow::fileOpen() {
+	auto fileName =
+		QFileDialog::getOpenFileName(
+			this,
+			tr("Open Archive"),
+			QString{},
+			tr("Quake PACK file (*.pak);;"
+			   "All files (*)"));
+
+	if(!fileName.isEmpty()) {
+		try {
+			auto st  = openReadBin(fileName.toStdString());
+			auto pak = readPak(st);
+			setListToDir(*listWidget, pak);
+		} catch(std::exception const &exc) {
+			m_errors.showMessage(tr(exc.what()));
+		}
+	}
 }
 
 // EOF

source/quam/main_window.h

@@ -2,6 +2,8 @@
 
 #include "quam/ui_main_window.h"
 
+#include <QErrorMessage>
+#include <QFileDialog>
 #include <QMainWindow>
 #include <QWidget>
 
@@ -12,7 +14,10 @@ public:
 	explicit MainWindow(QWidget *parent = nullptr);
 
 public slots:
-	void openTest();
+	void fileOpen();
+
+private:
+	QErrorMessage m_errors;
 };
 
 // EOF

source/quam/main_window.ui

@@ -16,17 +16,10 @@
   <widget class="QWidget" name="centralwidget">
    <layout class="QHBoxLayout" name="horizontalLayout_2">
     <item>
-     <widget class="QPushButton" name="pushButton">
-      <property name="sizePolicy">
-       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
-        <horstretch>0</horstretch>
-        <verstretch>0</verstretch>
-       </sizepolicy>
-      </property>
-      <property name="text">
-       <string>PushButton</string>
-      </property>
-     </widget>
+     <widget class="QListWidget" name="listWidget"/>
+    </item>
+    <item>
+     <widget class="QPlainTextEdit" name="textEdit"/>
     </item>
    </layout>
   </widget>
@@ -39,20 +32,61 @@
      <height>29</height>
     </rect>
    </property>
+   <widget class="QMenu" name="menuFile">
+    <property name="title">
+     <string>&amp;File</string>
+    </property>
+    <addaction name="actionOpen"/>
+    <addaction name="separator"/>
+    <addaction name="actionQuit"/>
+   </widget>
+   <addaction name="menuFile"/>
   </widget>
   <widget class="QStatusBar" name="statusbar"/>
+  <action name="actionOpen">
+   <property name="icon">
+    <iconset theme="document-open"/>
+   </property>
+   <property name="text">
+    <string>&amp;Open</string>
+   </property>
+  </action>
+  <action name="actionQuit">
+   <property name="icon">
+    <iconset theme="application-exit"/>
+   </property>
+   <property name="text">
+    <string>&amp;Quit</string>
+   </property>
+  </action>
  </widget>
  <resources/>
  <connections>
   <connection>
-   <sender>pushButton</sender>
-   <signal>clicked()</signal>
+   <sender>actionOpen</sender>
+   <signal>triggered()</signal>
    <receiver>MainWindow</receiver>
-   <slot>openTest()</slot>
+   <slot>fileOpen()</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>59</x>
-     <y>53</y>
+     <x>-1</x>
+     <y>-1</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>319</x>
+     <y>239</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>actionQuit</sender>
+   <signal>triggered()</signal>
+   <receiver>MainWindow</receiver>
+   <slot>close()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>-1</x>
+     <y>-1</y>
     </hint>
     <hint type="destinationlabel">
      <x>319</x>
@@ -62,6 +96,6 @@
   </connection>
  </connections>
  <slots>
-  <slot>openTest()</slot>
+  <slot>fileOpen()</slot>
  </slots>
 </ui>

source/quam/pak.cc

@@ -8,7 +8,7 @@ struct PakHeader {
 
 struct PakEntry {
 	std::string name;
-	QByteArray  data;
+	PakFile     data;
 };
 
 static constexpr quint32 sizeOfPakEntry = 64;
@@ -42,7 +42,7 @@ static PakEntry readPakEntry(std::istream &st) {
 
 	st.seekg(entOffset);
 
-	QByteArray bytes;
+	PakFile bytes;
 	bytes.resize(entSize);
 	st.read(bytes.data(), entSize);
 
@@ -50,27 +50,44 @@ static PakEntry readPakEntry(std::istream &st) {
 
 	auto zero = std::find(entName.cbegin(), entName.cend(), '\0');
 
-	std::string out;
-	std::copy(entName.cbegin(), zero, std::back_inserter(out));
+	std::string name;
+	std::copy(entName.cbegin(), zero, std::back_inserter(name));
+
+	if(name.front() == '/') {
+		throw std::runtime_error("empty root directory name");
+	}
 
 	PakEntry ent;
-	ent.name = std::move(out);
+	ent.name = std::move(name);
 	ent.data = std::move(bytes);
 	return ent;
 }
 
-PakFile readPakFile(std::istream &st) {
+void insertFile(PakDir &dir, std::string name, PakFile file) {
+	if(auto slash = name.find('/'); slash != std::string::npos) {
+		auto folder = name.substr(0, slash);
+		auto next   = name.substr(slash + 1);
+		dir[folder] = PakNode{PakDir{}};
+		insertFile(std::get<PakDir>(dir[folder]),
+		           std::move(next),
+		           std::move(file));
+	} else {
+		dir[name] = PakNode{std::move(file)};
+	}
+}
+
+PakDir readPak(std::istream &st) {
 	auto hdr = readPakHeader(st);
 	st.seekg(hdr.dirOffset);
 
-	PakFile pak;
+	PakDir root;
 
 	for(quint32 i = 0; i < hdr.dirNum; i++) {
 		auto ent = readPakEntry(st);
-		pak.emplace(std::move(ent.name), std::move(ent.data));
+		insertFile(root, std::move(ent.name), std::move(ent.data));
 	}
 
-	return pak;
+	return root;
 }
 
 // EOF

source/quam/pak.h

@@ -1,8 +1,22 @@
 #pragma once
 
-class PakFile : public std::map<std::string, QByteArray> {
-};
+struct PakNode;
 
-PakFile readPakFile(std::istream &st);
+struct PakDir : public std::map<std::string, PakNode> {
+	using std::map<std::string, PakNode>::map;
+};
+Q_DECLARE_METATYPE(PakDir)
+
+struct PakFile : public QByteArray {
+	using QByteArray::QByteArray;
+};
+Q_DECLARE_METATYPE(PakFile)
+
+struct PakNode : public std::variant<PakDir, PakFile> {
+	using std::variant<PakDir, PakFile>::variant;
+};
+Q_DECLARE_METATYPE(PakNode)
+
+PakDir readPak(std::istream &st);
 
 // EOF