Fix io::PakWriter, add pakcreate

Also improves paktest.

Pakcreate is a new utility for creating completely new archives from a directory.

Usage:
pakcreate [input path] [output .PAK/pmdl filename] [--jedi]

Options:
--jedi : Make Jedi Starfighter archive

include/europa/structs/Pak.h

@@ -36,13 +36,11 @@ namespace europa::structs {
 
 		u32 tocOffset;
 
-		// Dunno what this is
+		u32 tocSize;
-		u32 unk;
 
 		u32 fileCount;
 
-		// Could be Windows FILETIME?
+		u32 creationUnixTime;
-		u32 unk2;
 
 		u32 reservedPad;
 
@@ -97,10 +95,7 @@ namespace europa::structs {
 	struct [[gnu::packed]] PakTocEntry {
 		u32 offset;
 		u32 size;
-
+		u32 creationUnixTime;
-		// Seems to be the same as the header's
-		// unk2?
-		u32 unk3;
 	};
 
 	static_assert(sizeof(PakHeader) == 0x29, "PakHeader wrong size!!");

src/libeuropa/io/PakWriter.cpp

@@ -24,14 +24,13 @@ namespace europa::io {
 	}
 
 	void PakWriter::Write(std::ostream& os) {
-		// Set up the header a bit more...
 		pakHeader.fileCount = archiveFiles.size();
 
 		// Leave space for the header
 		os.seekp(sizeof(structs::PakHeader), std::ostream::beg);
 
 		// Seek forwards for version 2 PAKs, as the only
-		// difference seems to be
+		// difference seems to be this additional bump
 		if(pakHeader.version == structs::PakVersion::Ver2) {
 			os.seekp(6, std::ostream::cur);
 		}
@@ -57,6 +56,9 @@ namespace europa::io {
 			impl::WriteStreamType(os, file.GetTOCEntry());
 		}
 
+		// Fill out the TOC size.
+		pakHeader.tocSize = static_cast<std::uint32_t>(os.tellp()) - (pakHeader.tocOffset - 1);
+
 		os.seekp(0, std::ostream::beg);
 		impl::WriteStreamType(os, pakHeader);
 	}

src/tools/CMakeLists.txt

@@ -1,6 +1,7 @@
 add_executable(europa_pack_extractor europa_pack_extractor.cpp)
 
-target_link_libraries(europa_pack_extractor PUBLIC libeuropa
+target_link_libraries(europa_pack_extractor PUBLIC
+		libeuropa
 		indicators::indicators
 		)
 
@@ -9,10 +10,24 @@ set_target_properties(europa_pack_extractor PROPERTIES
 		CXX_STANDARD_REQUIRED ON
 		)
 
+add_executable(pakcreate pakcreate.cpp)
+
+target_link_libraries(pakcreate PUBLIC
+		libeuropa
+		indicators::indicators
+		)
+
+set_target_properties(pakcreate PROPERTIES
+		CXX_STANDARD 20
+		CXX_STANDARD_REQUIRED ON
+		)
+
 
 add_executable(texdump texdump.cpp)
 
-target_link_libraries(texdump PUBLIC libeuropa)
+target_link_libraries(texdump PUBLIC
+		libeuropa
+		)
 
 set_target_properties(texdump PROPERTIES
 		CXX_STANDARD 20
@@ -21,7 +36,9 @@ set_target_properties(texdump PROPERTIES
 
 add_executable(paktest paktest.cpp)
 
-target_link_libraries(paktest PUBLIC libeuropa)
+target_link_libraries(paktest PUBLIC
+		libeuropa
+		)
 
 set_target_properties(paktest PROPERTIES
 		CXX_STANDARD 20

src/tools/pakcreate.cpp

@@ -0,0 +1,80 @@
+//
+// EuropaTools
+//
+// (C) 2021-2022 modeco80 <lily.modeco80@protonmail.ch>
+//
+// SPDX-License-Identifier: LGPL-3.0-or-later
+//
+
+// A test utility to regurgitate a pak.
+
+#include <europa/io/PakReader.h>
+#include <europa/io/PakWriter.h>
+
+#include <fstream>
+#include <iostream>
+#include <filesystem>
+
+namespace fs = std::filesystem;
+
+using namespace europa;
+
+int main(int argc, char** argv) {
+	std::ofstream ofs(argv[2], std::ofstream::binary);
+
+	if(!ofs) {
+		std::cout << "Couldn't open output PAK file\n";
+		return 1;
+	}
+
+	io::PakWriter writer;
+
+	if(argv[3] != nullptr) {
+		if(!strcmp(argv[3], "--jedi")) {
+			std::cout << "Writing Jedi Starfighter archive\n";
+			writer.Init(structs::PakVersion::Ver2);
+		}
+	} else {
+		std::cout << "Writing Starfighter archive\n";
+		writer.Init(structs::PakVersion::Starfighter);
+	}
+
+	for(auto& ent : fs::recursive_directory_iterator(argv[1])) {
+		if(ent.is_directory())
+			continue;
+
+		auto relativePathName = fs::relative(ent.path(), argv[1]).string();
+
+		// Convert to Windows path separator always (that's what the game wants, after all)
+		for(auto& c : relativePathName)
+			if(c == '/')
+				c = '\\';
+
+		std::ifstream ifs(ent.path(), std::ifstream::binary);
+
+		if(!ifs) {
+			std::cout << "ERROR: Couldn't open file for archive path \"" << relativePathName << "\"\n";
+			return 1;
+		}
+
+		io::PakFile file;
+		io::PakFile::DataType pakData;
+
+		ifs.seekg(0, std::ifstream::end);
+		pakData.resize(ifs.tellg());
+		ifs.seekg(0, std::ifstream::beg);
+
+		ifs.read(reinterpret_cast<char*>(&pakData[0]), pakData.size());
+
+		file.SetData(std::move(pakData));
+		file.FillTOCEntry();
+
+		std::cout << "Added \"" << relativePathName << "\"\n";
+		writer.GetFiles()[relativePathName] = std::move(file);
+	}
+
+	writer.Write(ofs);
+
+	std::cout << "Wrote archive to \"" << argv[2] << "\"!\n";
+	return 0;
+}

src/tools/paktest.cpp

@@ -14,29 +14,51 @@
 #include <fstream>
 #include <iostream>
 
+using namespace europa;
+
 int main(int argc, char** argv) {
 	std::ifstream ifs(argv[1], std::ifstream::binary);
-	std::ofstream ofs("new_archive.pak", std::ofstream::binary);
+	std::ofstream ofs(argv[2], std::ofstream::binary);
 
-	europa::io::PakWriter writer;
+	if(!ifs) {
+		std::cout << "Couldn't open input PAK file\n";
+		return 1;
+	}
 
-	writer.Init(europa::structs::PakVersion::Ver2);
+	io::PakWriter writer;
+
+	if(argv[3] != nullptr) {
+		if(!strcmp(argv[3], "--jedi")) {
+			std::cout << "Writing Jedi Starfighter archive\n";
+			writer.Init(structs::PakVersion::Ver2);
+		}
+	} else {
+		std::cout << "Writing Starfighter archive\n";
+		writer.Init(structs::PakVersion::Starfighter);
+	}
 
 	// Read pak data and vomit it into the writer.
 	// This will temporarily consume 2x the memory (so about 240mb for the biggest paks I've seen),
 	// but the writer will contain the first copy,
 	// until it's cleared.
 	{
-		europa::io::PakReader reader(ifs);
+		io::PakReader reader(ifs);
 		reader.ReadData();
 
+		if(reader.Invalid()) {
+			std::cout << "Invalid pak file, exiting\n";
+			return 1;
+		}
+
 		for(auto& [filename, file] : reader.GetFiles()) {
+			std::cout << "Reading \"" << filename << "\" into memory\n";
+			reader.ReadFile(filename);
 			writer.GetFiles()[filename] = file;
 		}
 	}
 
 	writer.Write(ofs);
 
-	std::cout << "Wrote regurgitated archive to new.pak!\n";
+	std::cout << "Wrote regurgitated archive to \"" << argv[2] << "\"!\n";
 	return 0;
 }