53 lines
1.8 KiB
C++
53 lines
1.8 KiB
C++
#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <string>
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#include <unordered_map>
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#include <vector>
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// Entrada d'un recurs dins el pack (format AEE, equivalent a CCAE).
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struct ResourceEntry {
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std::string filename;
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uint64_t offset{0};
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uint64_t size{0};
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uint32_t checksum{0};
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};
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// Pack binari de recursos carregat a memòria. Formato:
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// Header: "AEE1" (4 bytes) + version uint32 + resource_count uint32
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// Index: per cada recurs -> filename_len uint32 + filename + offset uint64
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// + size uint64 + checksum uint32
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// Payload: data_size uint64 + bytes xifrats amb XOR (DEFAULT_ENCRYPT_KEY)
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class ResourcePack {
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public:
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ResourcePack();
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~ResourcePack();
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// I/O del fitxer
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auto loadPack(const std::string& pack_file) -> bool;
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auto savePack(const std::string& pack_file) -> bool;
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// Builders usats per l'eina pack_resources
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auto addFile(const std::string& filename, const std::string& filepath) -> bool;
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auto addDirectory(const std::string& directory) -> bool;
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[[nodiscard]] auto getResource(const std::string& filename) -> std::vector<uint8_t>;
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[[nodiscard]] auto hasResource(const std::string& filename) const -> bool;
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void clear();
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[[nodiscard]] auto getResourceCount() const -> size_t;
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[[nodiscard]] auto getResourceList() const -> std::vector<std::string>;
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static const std::string DEFAULT_ENCRYPT_KEY;
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private:
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std::unordered_map<std::string, ResourceEntry> resources_;
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std::vector<uint8_t> data_;
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bool loaded_{false};
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static auto calculateChecksum(const std::vector<uint8_t>& data) -> uint32_t;
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static void encryptData(std::vector<uint8_t>& data, const std::string& key);
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static void decryptData(std::vector<uint8_t>& data, const std::string& key);
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};
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