resource.pack

source/resource_pack.h

@@ -0,0 +1,44 @@
+#pragma once
+
+#include <cstddef>
+#include <cstdint>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+struct ResourceEntry {
+    std::string filename;
+    uint64_t offset;
+    uint64_t size;
+    uint32_t checksum;
+};
+
+class ResourcePack {
+   private:
+    std::unordered_map<std::string, ResourceEntry> resources_;
+    std::vector<uint8_t> data_;
+    bool loaded_;
+
+    static uint32_t calculateChecksum(const std::vector<uint8_t>& data);
+    static void encryptData(std::vector<uint8_t>& data, const std::string& key);
+    static void decryptData(std::vector<uint8_t>& data, const std::string& key);
+
+   public:
+    ResourcePack();
+    ~ResourcePack();
+
+    bool loadPack(const std::string& pack_file);
+    bool savePack(const std::string& pack_file);
+
+    bool addFile(const std::string& filename, const std::string& filepath);
+    bool addDirectory(const std::string& directory);
+
+    std::vector<uint8_t> getResource(const std::string& filename);
+    bool hasResource(const std::string& filename) const;
+
+    void clear();
+    size_t getResourceCount() const;
+    std::vector<std::string> getResourceList() const;
+
+    static const std::string DEFAULT_ENCRYPT_KEY;
+};