/* SPDX-License-Identifier: Apache-2.0 */

/* Copyright 2026 Thorsten Töpper
 *
 * vim:ts=4:sw=4:expandtab
 */
#ifndef FILE_PROCESSOR_H
#define FILE_PROCESSOR_H

#include <sys/stat.h>

#define DF_BYTE_SIZE_256 32
#define DF_BYTE_SIZE_512 64
#define DF_STR_SIZE_256 64
#define DF_STR_SIZE_512 128

/* Aliases for convenience, currently all algorithms are part of the default
 * provider. */
#define DF_OSSL_BLAKE2 "BLAKE2B-512"
#define DF_OSSL_SHA256 "SHA2-256"
#define DF_OSSL_SHA512 "SHA2-512"

/**
 * The hashes in human-readable strings
 */
struct df_hashstrings {
    char blake2[DF_STR_SIZE_512+1];
    char sha256[DF_STR_SIZE_256+1];
    char sha512[DF_STR_SIZE_512+1];
};

/**
 * information about a file
 * Contains filepath, stat() results, hash values of multiple algorithms.
 * TODO: Organize the paths in a global pool (list/tree/map) and only refer there
 * without any free() calls triggered through the pointer in the struct.
 */
struct df_fileinfo {
    char *path; /**< pointer to the path of the file */
    char *name; /**< pointer to the name of the file */
#if 0
    unsigned char blake2[DF_BYTE_SIZE_512]; /**< The BLAKE2-512 hash in binary form */
    unsigned char sha256[DF_BYTE_SIZE_256]; /**< The SHA256 hash in binary form. */
    unsigned char sha512[DF_BYTE_SIZE_512]; /**< The SHA512 hash in binary form. */
#endif
    struct df_hashstrings hashes; /**< The BLAKE2-512, SHA256 and SHA512 hash of the file */
    struct stat statbuf; /**< Result of lstat() call. Symlinks are to be ignored and filtered out earlier. */
};


/*=========== FUNCTIONS ===========*/
int process_file(struct df_fileinfo *info);
int process_gdbm_content();

#endif