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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* id_table.h
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#ifndef ID_TABLE_H
#define ID_TABLE_H
#include "config.h"
#include <stdint.h>
#include <stddef.h>
#include "compress.h"
/* Encapsulates the ID table used by SquashFS */
typedef struct {
/* Array of unique 32 bit IDs */
uint32_t *ids;
/* Number of 32 bit IDs stored in the array */
size_t num_ids;
/* Actual size of the array, i.e. maximum available */
size_t max_ids;
} id_table_t;
/* Returns 0 on success. Prints error message to stderr on failure. */
int id_table_init(id_table_t *tbl);
void id_table_cleanup(id_table_t *tbl);
/* Resolve a 32 bit to a 16 bit table index.
Returns 0 on success. Internally prints errors to stderr. */
int id_table_id_to_index(id_table_t *tbl, uint32_t id, uint16_t *out);
/* Write an ID table to a SquashFS image.
Returns 0 on success. Internally prints error message to stderr. */
int id_table_write(id_table_t *tbl, int outfd, sqfs_super_t *super,
compressor_t *cmp);
/* Read an ID table from a SquashFS image.
Returns 0 on success. Internally prints error messages to stderr. */
int id_table_read(id_table_t *tbl, int fd, sqfs_super_t *super,
compressor_t *cmp);
#endif /* ID_TABLE_H */
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