#include "config.h"
#include "tar.h"
#include "logerr.h"

#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdbool.h>

/*

About the ustar format:
- name[100] can only contain 100 bytes, while PATH_MAX's minimum value is 256
  for `_POSIX_PATH_MAX`, and 1024 for _XOPEN_PATH_MAX.  Wait!  Actually there is
  a "prefix" field, which is probably what I'm looking for;
- characters are encoded in ISO/IEC 646:1991 [0] instead of UTF-8, even though
  it requires the file names to be conformant to the POSIX filename
  restrictions;

[0]: https://en.wikipedia.org/wiki/ISO/IEC_646

*/

/*
 * Implementation of the "ustar archive tape" (tar) format, conformant to the
 * specification [0].
 *
 * [0]: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/pax.html#tag_20_92_13_06
 */


static void
logerr(
	const char *const s,
	const char *const msg,
	const int lineno
) {
	logerr_file(s, msg, __FILE__, lineno);
}

static void
logerrs(
	const char *const pre,
	const char *const mid,
	const char *const post,
	const char *const msg,
	const int lineno
) {
	logerrs_file(pre, mid, post, msg, __FILE__, lineno);
}

static void
logerrl(
	const char *const pre,
	const size_t mid,
	const char *const post,
	const char *const msg,
	const int lineno
) {
	logerrl_file(pre, mid, post, msg, __FILE__, lineno);
}


struct TarEntry {
	// What size the spec says?
	unsigned int begin;
};

// static int tar_write(FILE *const fd, 

int
tarball_write_from_directory(
	const FILE *const fd,
	const char *const directory_path
) {
	int ret = 0;
	struct TarEntry *entry = NULL;
	(void)directory_path;
	(void)fd;

	if (!(entry = malloc(sizeof(struct TarEntry)))) {
		logerrl("malloc(", sizeof(struct TarEntry), ")",
			strerror(errno), __LINE__);
			ret = -1;
			goto cleanup;
	}

	if (false) {
		logerrs("", "", "", "", 0);
		logerr("", "", 0);
	}


cleanup:
	free(entry);
	return ret;
}

#ifdef TEST
void
unit_tests_tar(void) {}
#endif