libeuropa/io: Fix PakWriter/PakFile zero-size-bug

This bug was introduced during refactoring (to allow pmdl export support); it causes the writer to not write any file data.

Additionally the writer now sorts by creation time. I'm not sure if greater or less are the correct order.

README.md

@@ -8,7 +8,7 @@ As per usual for lily, written in C++20.
 ## Building
 
 ```bash
-$ git clone https://github.com/modeco80/EuropaTools.git
+$ git clone https://git.crustywindo.ws/GameModding/EuropaTools.git
 $ cd EuropaTools
 $ cmake -Bbuild -DCMAKE_BUILD_TYPE=Release
 $ cmake --build build -j $(nproc)

include/europa/io/PakFile.hpp

@@ -18,6 +18,10 @@ namespace europa::io {
 	struct PakReader;
 	struct PakWriter;
 
+	/// Repressents a package file.
+	/// FIXME: Maybe make this not hold a buffer at some point,
+	/// or a sumtype which can contain either buffer OR path to os file
+	/// (which we can then efficiently tee into)
 	struct PakFile {
 		using DataType = std::vector<std::uint8_t>;
 
@@ -57,6 +61,21 @@ namespace europa::io {
 
 		void SetData(DataType&& data) {
 			this->data = std::move(data);
+			
+			// Update the TOC size.
+			std::visit([&](auto& entry) {
+				entry.size = this->data.size();
+			}, toc);
+		}
+
+		std::uint32_t GetCreationUnixTime() const {
+			std::uint32_t time{};
+
+			std::visit([&](auto& entry) {
+				time = entry.creationUnixTime;
+			}, toc);
+
+			return time;
 		}
 
 		std::uint32_t GetOffset() const {

src/libeuropa/io/PakWriter.cpp

@@ -1,7 +1,7 @@
 //
 // EuropaTools
 //
-// (C) 2021-2022 modeco80 <lily.modeco80@protonmail.ch>
+// (C) 2021-2025 modeco80 <lily.modeco80@protonmail.ch>
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
@@ -16,6 +16,9 @@
 
 namespace europa::io {
 
+	/// The size of a CD-ROM (ISO 9660) secor.
+	constexpr auto kCDSectorSize = 0x800;
+
 	void PakWriter::SetVersion(structs::PakVersion version) {
 		// for now.
 		this->version = version;
@@ -52,7 +55,7 @@ namespace europa::io {
 		// Sort the flattened array by file size, the biggest first.
 		// Doesn't seem to help (neither does name length)
 		std::ranges::sort(sortedFiles, std::greater{}, [](const FlattenedType& elem) {
-			return elem.second.GetSize();
+			return elem.second.GetCreationUnixTime();
 		});
 
 		// Leave space for the header
@@ -64,10 +67,12 @@ namespace europa::io {
 			os.seekp(6, std::ostream::cur);
 		}
 
-		//os.seekp( 
+		// Align first file to sector boundary.
-		//	AlignBy(os.tellp(), 2048),
+		if(sectorAligned)
-		//	std::istream::beg
+			os.seekp( 
-		//);
+				AlignBy(os.tellp(), kCDSectorSize),
+				std::istream::beg
+			);
 
 		// Write file data
 		for(auto& [filename, file] : sortedFiles) {
@@ -76,20 +81,21 @@ namespace europa::io {
 				filename
 			});
 
-
+			// Update the offset to where we currently are, since we will be writing the file there
 			file.Visit([&](auto& tocEntry) {
 				tocEntry.offset = os.tellp();
 			});
 
+			// FIXME: Should we rely on GetSize() when writing? Honestly, it seems like a bit of a
+			// mistake that caused a pretty glaring bug.
 			os.write(reinterpret_cast<const char*>(file.GetData().data()), file.GetSize());
 
-			//os.seekp( 
+			// Align to sector boundary.
-			//	AlignBy(os.tellp(), 2048),
+			if(sectorAligned)
-			//	std::istream::beg
+				os.seekp( 
-			//);
+					AlignBy(os.tellp(), kCDSectorSize),
-
+					std::istream::beg
-			// Flush on file writing
+				);
-			os.flush();
 
 			sink.OnEvent({
 				PakProgressReportSink::FileEvent::Type::FileEndWrite,
@@ -107,7 +113,7 @@ namespace europa::io {
 		for(auto& [filename, file] : sortedFiles) {
 			file.FillTOCEntry();
 
-			// Write the pstring
+			// Write the filename Pascal string.
 			os.put(static_cast<char>(filename.length() + 1));
 			for(const auto c : filename)
 				os.put(c);
@@ -116,7 +122,6 @@ namespace europa::io {
 			file.Visit([&](auto& tocEntry) {
 				impl::WriteStreamType(os, tocEntry);
 			});
-
 		}
 
 
@@ -127,6 +132,7 @@ namespace europa::io {
 		// Fill out the rest of the header.
 		pakHeader.fileCount = sortedFiles.size();
 		pakHeader.tocSize = static_cast<std::uint32_t>(os.tellp()) - (pakHeader.tocOffset - 1);
+		pakHeader.creationUnixTime = 132890732;
 
 
 		sink.OnEvent({

src/libeuropa/io/YatfReader.cpp

@@ -1,11 +1,15 @@
 //
 // EuropaTools
 //
-// (C) 2021-2022 modeco80 <lily.modeco80@protonmail.ch>
+// (C) 2021-2025 modeco80 <lily.modeco80@protonmail.ch>
 //
 // SPDX-License-Identifier: LGPL-3.0-or-later
 //
 
+// FIXME: Drop libpixel dependency. Instead
+// we should just use stbiw directly and provide our own
+// simpler/faster utilities for image buffers.
+
 #include <europa/io/YatfReader.hpp>
 #include <vector>
 

src/tools/eupak/tasks/CreateTask.cpp

@@ -6,6 +6,7 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 //
 
+#include <chrono>
 #include <europa/io/PakWriter.hpp>
 #include <fstream>
 #include <indicators/cursor_control.hpp>
@@ -17,7 +18,6 @@
 namespace eupak::tasks {
 
 	struct CreateArchiveReportSink : public europa::io::PakProgressReportSink {
-
 		CreateArchiveReportSink(int fileCount = 0)
 			: europa::io::PakProgressReportSink() {
 			indicators::show_console_cursor(false);
@@ -123,7 +123,6 @@ namespace eupak::tasks {
 				if(c == '/')
 					c = '\\';
 
-
 			progress.set_option(indicators::option::PostfixText { relativePathName + " (" + std::to_string(currFile + 1) + '/' + std::to_string(fileCount) + ")" });
 
 			std::ifstream ifs(ent.path(), std::ifstream::binary);
@@ -142,11 +141,18 @@ namespace eupak::tasks {
 
 			ifs.read(reinterpret_cast<char*>(&pakData[0]), pakData.size());
 
-			file.SetData(std::move(pakData));
-
 			file.InitAs(args.pakVersion);
 
-			//file.GetTOCEntry().creationUnixTime = static_cast<std::uint32_t>(lastModified.time_since_epoch().count());
+			// Add data
+			file.SetData(std::move(pakData));
+
+			// Setup other stuff like modtime
+			file.Visit([&](auto& tocEntry) {
+				// Need to figure out why this is broken and fucked up
+				//auto casted = std::chrono::clock_cast<std::chrono::system_clock>(lastModified);
+				auto seconds = std::chrono::time_point_cast<std::chrono::seconds>(lastModified);
+				tocEntry.creationUnixTime = static_cast<std::uint32_t>(seconds.time_since_epoch().count());
+			});
 
 			files.emplace_back(std::make_pair(relativePathName, std::move(file)));
 			progress.tick();

src/tools/jsfscramble.cpp

@@ -13,10 +13,21 @@
 #include <string>
 #include <string_view>
 
-// Define this to enable an "interactive" mode where the scramble routine will
+/// Define this to enable an "interactive" mode where the scramble routine will
-// dump out whatever it does to standard out. Undefine this to make it not do so.
+/// dump out whatever it does to standard out. Undefine this to make it not do so.
 #define INTERACTIVE
 
+/// Define this to use a slower, more academic implementation of the algorithm.
+// #define SLOW
+
+#ifdef INTERACTIVE
+	// We need to use the
+	#ifndef SLOW
+		#define SLOW
+	#endif
+#endif
+
+#ifdef SLOW
 template <typename... Args>
 inline std::string StringPrintf(std::string_view format, Args&&... args) {
 	char buffer[1024];
@@ -58,6 +69,10 @@ std::uint32_t swsfScramble(const std::string& code) {
 	return tally;
 }
 
+#else
+	#error FIXME: Import fast/optimized version
+#endif
+
 int main(int argc, char** argv) {
 	if(argc < 2) {
 		std::printf("usage: %s [code-string]\n", argv[0]);