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Nunuhara Cabbage
99b375acce
Support whole archive, by-index and by-name extraction of files from ALD and AFA archives.
126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
/* Copyright (C) 2019 Nunuhara Cabbage <nunuhara@haniwa.technology>
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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 2 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://gnu.org/licenses/>.
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*/
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#ifndef SYSTEM4_ARCHIVE_H
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#define SYSTEM4_ARCHIVE_H
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#include <stdbool.h>
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#include <stdint.h>
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#include <stddef.h>
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enum ald_error {
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ARCHIVE_SUCCESS,
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ARCHIVE_FILE_ERROR,
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ARCHIVE_BAD_ARCHIVE_ERROR,
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ARCHIVE_MAX_ERROR
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};
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enum {
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ARCHIVE_MMAP = 1
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};
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struct archive {
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bool mmapped;
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struct archive_ops *ops;
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};
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struct archive_ops {
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bool (*exists)(struct archive *ar, int no);
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bool (*exists_by_name)(struct archive *ar, const char *name);
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struct archive_data *(*get)(struct archive *ar, int no);
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struct archive_data *(*get_by_name)(struct archive *ar, const char *name);
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bool (*load_file)(struct archive_data *data);
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void (*for_each)(struct archive *ar, void (*iter)(struct archive_data *data, void *user), void *user);
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void (*free_data)(struct archive_data *data);
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void (*free)(struct archive *ar);
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};
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struct archive_data {
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size_t size;
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uint8_t *data;
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char *name;
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int no;
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void *private;
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struct archive *archive;
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};
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/*
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* Returns a human readable description of an error.
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*/
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const char *archive_strerror(int error);
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/*
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* Check if data exists in an archive.
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*/
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static inline bool archive_exists(struct archive *ar, int no)
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{
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return ar->ops->exists ? ar->ops->exists(ar, no) : false;
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}
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static inline bool archive_exists_by_name(struct archive *ar, const char *name)
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{
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return ar->ops->exists_by_name ? ar->ops->exists_by_name(ar, name) : false;
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}
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/*
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* Retrieve a file from an archive by ID.
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*/
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static inline struct archive_data *archive_get(struct archive *ar, int no)
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{
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return ar->ops->get ? ar->ops->get(ar, no) : NULL;
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}
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/*
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* Retrieve a file from an archive by name.
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*/
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static inline struct archive_data *archive_get_by_name(struct archive *ar, const char *name)
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{
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return ar->ops->get_by_name ? ar->ops->get_by_name(ar, name) : NULL;
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}
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/*
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* Load a file into memory, given an uninitialized descriptor.
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* This should be used in conjunction with archive_for_each.
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*/
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static inline bool archive_load_file(struct archive_data *data)
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{
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return data->archive->ops->load_file ? data->archive->ops->load_file(data) : false;
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}
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static inline void archive_for_each(struct archive *ar, void (*iter)(struct archive_data *data, void *user), void *user)
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{
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if (ar->ops->for_each)
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ar->ops->for_each(ar, iter, user);
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}
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/*
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* Free an archive_data structure returned by `archive_get`.
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*/
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static inline void archive_free_data(struct archive_data *data)
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{
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data->archive->ops->free_data(data);
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}
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/*
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* Free an ald_archive structure returned by `ald_open`.
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*/
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static inline void archive_free(struct archive *ar)
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{
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ar->ops->free(ar);
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}
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#endif /* SYSTEM4_ARCHIVE_H */
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