mirror of
https://github.com/kevinbentley/Descent3.git
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102 lines
2.9 KiB
C++
102 lines
2.9 KiB
C++
/*
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* Descent 3
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* Copyright (C) 2024 Descent Developers
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <array>
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#include <cstdint>
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#include <filesystem>
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#include <vector>
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#include "IOOps.h"
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namespace D3 {
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/*
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HOG FILE FORMAT v2.0
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HOG_TAG_STR [strlen()]
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NFILES [int32]
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HDRINFO [HOG_HDR_SIZE]
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FILE_TABLE [sizeof(FILE_ENTRY) * NFILES]
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FILE 0 [filelen(FILE 0)]
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FILE 1 [filelen(FILE 1)]
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...
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FILE NFILES-1 [filelen(NFILES -1)]
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*/
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static inline std::array<char, 56> array_with(char val) {
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std::array<char, 56> arr;
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arr.fill(val);
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return arr;
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}
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struct HogHeader {
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std::array<char, 4> tag = {'H', 'O', 'G', '2'}; // "HOG2"
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uint32_t nfiles = 0; // number of files in header
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uint32_t file_data_offset = 68; // offset in file to filedata.
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std::array<char, 56> reserved = array_with(-1); // filled with 0xff
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};
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class HogFileEntry {
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private:
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std::array<char, 36> m_name = {}; // file name (36 char max)
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uint32_t m_flags = 0; // extra info
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uint32_t m_len = 0; // length of file
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uint32_t m_timestamp = 0; // time of file
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std::filesystem::path m_real_path = {}; // real path
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public:
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HogFileEntry() = default;
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explicit HogFileEntry(const std::filesystem::path &input);
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explicit HogFileEntry(std::string name, uint32_t flags = 0, uint32_t len = 0, uint32_t timestamp = 0);
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std::filesystem::path GetRealPath() const { return m_real_path; }
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void SetRealPath(const std::filesystem::path &input);
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std::string GetName() const { return {m_name.data()}; };
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friend std::ostream &operator<<(std::ostream &output, const HogFileEntry &entry);
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friend class HogFormat;
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};
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class HogFormat {
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private:
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HogHeader m_header;
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std::vector<HogFileEntry> m_file_entries;
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public:
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void AddEntry(const HogFileEntry &entry) {
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m_file_entries.push_back(entry);
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m_header.nfiles++;
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m_header.file_data_offset += 48;
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};
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/**
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* Sort entries case-insensitive alphabetically. Call this method before any
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* writing on disk: Descent 3 expects that entries in HOG are sorted.
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*/
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void SortEntries();
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uint32_t Count() const { return m_header.nfiles; }
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std::vector<HogFileEntry> GetEntries() const { return m_file_entries; }
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friend std::ostream &operator<<(std::ostream &output, const HogFormat &format);
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};
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} // namespace D3
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