Store individual multiblock saves into a separate in-mem db by value

src/qt/block_db.cpp

@@ -0,0 +1,82 @@
+/* Copyright 2020-2025, Michele Santullo
+ * This file is part of memoserv.
+ *
+ * Memoserv is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Memoserv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Memoserv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "block_db.hpp"
+#include "memcard/block.hpp"
+#include <algorithm>
+#include <ciso646>
+#include <iterator>
+#include <utility>
+#include <tuple>
+
+namespace duck {
+BlockEntry::BlockEntry (
+	std::vector<mc::psx::BasicBlock<false>>&& blocks,
+	std::unique_ptr<uint8_t[]>&& data
+) :
+	blocks(std::move(blocks)),
+	data(std::move(data))
+{
+}
+
+std::string_view BlockEntry::identifier() const {
+	return blocks.front().identifier();
+}
+
+std::string BlockEntry::title() const {
+	return blocks.front().title();
+}
+
+BlockDb::BlockDb() = default;
+BlockDb::~BlockDb() noexcept = default;
+
+template <bool Const>
+unsigned int BlockDb::add (const std::vector<mc::psx::BasicBlock<Const> >& blocks) {
+	constexpr auto block_size = mc::psx::BasicBlock<Const>::BlockByteSize;
+	constexpr auto frame_size = mc::psx::BasicFrame<Const>::Size;
+	assert(not blocks.empty());
+
+	const auto block_count = blocks.size();
+	assert(block_count == blocks.front().block_count());
+	auto mem = std::make_unique<uint8_t[]>(frame_size + block_size * block_count);
+
+	uint8_t* dest = std::copy(blocks.front().toc().cbegin(), blocks.front().toc().cend(), mem.get());
+	assert(std::distance(mem.get(), dest) == frame_size);
+	mc::psx::Frame toc(mem.get(), 0);
+
+	std::vector<mc::psx::BasicBlock<false>> new_blocks;
+	new_blocks.reserve(block_count);
+	std::size_t index = 0;
+	for (const auto& block : blocks) {
+		assert(block_count == block.block_count() or block.block_count() == 0);
+		uint8_t* const curr_block_ptr = dest;
+		dest = std::copy(block.data(), block.data() + block_size, dest);
+		new_blocks.emplace_back(curr_block_ptr, toc, index++);
+	}
+
+	const std::size_t new_id = m_next_id++;
+	m_saves.emplace(
+		std::piecewise_construct,
+		std::forward_as_tuple(new_id),
+		std::forward_as_tuple(std::move(new_blocks), std::move(mem))
+	);
+	return static_cast<unsigned int>(m_saves.size() - 1u);
+}
+
+template unsigned int BlockDb::add<true> (const std::vector<mc::psx::BasicBlock<true> >&);
+template unsigned int BlockDb::add<false> (const std::vector<mc::psx::BasicBlock<false> >&);
+} //namespace duck

src/qt/block_db.hpp

@@ -0,0 +1,57 @@
+/* Copyright 2020-2025, Michele Santullo
+ * This file is part of memoserv.
+ *
+ * Memoserv is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Memoserv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Memoserv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <cstdint>
+#include <vector>
+#include <memory>
+#include <string_view>
+#include <string>
+#include <map>
+
+namespace mc::psx {
+template <bool C> class BasicBlock;
+} //namespace mc::psx
+
+namespace duck {
+struct BlockEntry {
+	BlockEntry (
+		std::vector<mc::psx::BasicBlock<false> >&& blocks,
+		std::unique_ptr<uint8_t[]>&& data
+	);
+
+	std::string_view identifier() const;
+	std::string title() const;
+
+	std::vector<mc::psx::BasicBlock<false> > blocks;
+	std::unique_ptr<uint8_t[]> data;
+};
+
+class BlockDb {
+public:
+	BlockDb();
+	~BlockDb() noexcept;
+
+	template <bool Const>
+	unsigned int add (const std::vector<mc::psx::BasicBlock<Const> >& blocks);
+
+private:
+	std::map<unsigned int, BlockEntry> m_saves;
+	std::size_t m_next_id{0};
+};
+} //namespace duck

src/qt/memoserv_win.cpp

@@ -30,6 +30,7 @@
 #include <QLabel>
 #include <memory>
 #include <filesystem>
+#include <cassert>
 
 class QApplication;
 
@@ -105,7 +106,16 @@ void MemoservWin::load_memory_cards (const QStringList& paths) {
 		auto& mc = m_memcards.back();
 		auto grid = std::make_unique<widget::BlockGrid>(this, 5, 3, g_icon_fps);
 		grid->set_icon_size(g_icon_size);
+
+		std::vector<mc::psx::Block> blocks_for_db;
 		for (const auto& block : mc) {
+			blocks_for_db.reserve(block.block_count());
+			blocks_for_db.push_back(block);
+			if (blocks_for_db.size() == blocks_for_db.front().block_count()) {
+				m_block_db.add(blocks_for_db);
+				blocks_for_db.clear();
+			}
+
 			for (std::size_t n = 0; block.has_magic() and n < block.block_count(); ++n) {
 				grid->push_back(make_qt_animation(block, g_icon_size, g_icon_size));
 			}

src/qt/memoserv_win.hpp

@@ -17,6 +17,7 @@
 
 #pragma once
 
+#include "block_db.hpp"
 #include <QMainWindow>
 #include <QStringList>
 #include <list>
@@ -45,6 +46,7 @@ private:
 	void open_file_from_dialog();
 	void load_memory_cards (const QStringList& paths);
 
+	duck::BlockDb m_block_db;
 	std::list<mc::psx::MemoryCard> m_memcards;
 	QGridLayout* m_main_lay;
 	unsigned int m_grid_count;

src/qt/meson.build

@@ -38,6 +38,7 @@ executable(app_name,
   'widgets/detail/block_drag_and_drop.cpp',
   'make_qt_animation.cpp',
   'animated_pixmap.cpp',
+  'block_db.cpp',
   include_directories: inc,
   dependencies: [
     qt6_dep,

subprojects/memcard/include/memcard/block.hpp

@@ -48,12 +48,14 @@ public:
 	static const constexpr std::size_t FrameCount = 64;
 	static const constexpr std::size_t TOCBlockIndex = 0xFF;
 	static const constexpr uint16_t LastLink = 0xFFFF;
+	static constexpr std::size_t BlockByteSize = BasicFrame<Const>::Size * FrameCount;
 
 	BasicBlock() = default;
+	constexpr BasicBlock (const BasicBlock& other);
+	BasicBlock(BasicBlock&&) = default;
 	BasicBlock (data_type* blk, std::size_t index);
 	BasicBlock (data_type* blk, BasicFrame<Const> toc_entry, std::size_t index);
 	template <bool Const2> BasicBlock(const BasicBlock<Const2>& other);
-	BasicBlock(BasicBlock&&) = default;
 	~BasicBlock();
 
 	iterator begin();
@@ -68,6 +70,8 @@ public:
 
 	BasicFrame<Const> frame(unsigned int idx);
 	ConstFrame frame(unsigned int idx) const;
+	BasicFrame<Const> toc();
+	ConstFrame toc() const;
 
 	static constexpr std::size_t size() { return FrameCount; }
 
@@ -115,12 +119,21 @@ inline int32_t calc_icon_count (IconDisplayFlag idf) {
 	}
 }
 
+template <bool Const>
+constexpr BasicBlock<Const>::BasicBlock (const BasicBlock& other) :
+	m_toc_entry(other.m_toc_entry),
+	m_index(other.m_index),
+	m_begin(other.m_begin)
+{
+}
+
 template <bool Const>
 template <bool Const2>
-inline BasicBlock<Const>::BasicBlock (const BasicBlock<Const2>& other) {
-	m_index = other.m_index;
-	m_toc_entry = other.m_toc_entry;
-	m_begin = other.m_begin;
+inline BasicBlock<Const>::BasicBlock(const BasicBlock<Const2>& other) :
+	m_toc_entry(other.m_toc_entry),
+	m_index(other.m_index),
+	m_begin(other.m_begin)
+{
 }
 
 using Block = BasicBlock<false>;

subprojects/memcard/src/block.cpp

@@ -145,6 +145,16 @@ ConstFrame BasicBlock<Const>::frame(unsigned int idx) const {
 	return {this->data() + Frame::Size * idx, idx};
 }
 
+template <bool Const>
+BasicFrame<Const> BasicBlock<Const>::toc() {
+	return m_toc_entry;
+}
+
+template <bool Const>
+ConstFrame BasicBlock<Const>::toc() const {
+	return m_toc_entry;
+}
+
 template <bool Const>
 std::vector<uint8_t> BasicBlock<Const>::icon_palette() const {
 	return extract_palette(frame(0));