#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>

#include "main.h"
#include "disk.h"
#include "config.h"


int dirent_add(char * block, __u32 inum, char * name)
{
	struct ext2_dir_entry_2 * dirent;
	int myreclen;
	int orig_rec_len;

	myreclen = EXT2_DIR_REC_LEN(strlen(name));

	for (dirent = (struct ext2_dir_entry_2 *)block; (void *)dirent < ((void *)block)+blocksize; ((void *)dirent) += dirent->rec_len) {
		if (dirent->rec_len - dirent->name_len >= myreclen) {
			orig_rec_len = dirent->rec_len;
			dirent->rec_len = EXT2_DIR_REC_LEN(dirent->name_len);
			orig_rec_len -= dirent->rec_len;

			((void *)dirent) += dirent->rec_len;

			dirent->inode = inum;
			dirent->rec_len = orig_rec_len;
			dirent->name_len = strlen(name);
			dirent->file_type = 0;
			memcpy(dirent->name, name, strlen(name));
			return 1;
		}
	}
	return 0;
}

int dirent_del(char * block, __u32 inum, __u32 lost_found_ino)
{
	struct ext2_dir_entry_2 * dirent, * ldirent;
	for (ldirent = NULL, dirent = (struct ext2_dir_entry_2 *)block; (void *)dirent < ((void *)block)+blocksize; ldirent = dirent, ((void *)dirent) += dirent->rec_len)
		if (dirent->inode == inum) {
			if (!ldirent) {
				fprintf(stderr, "Internal error 32762:6448\n");
				exit(-1);
			}
			if (dirent->name_len == 2 && !memcmp(dirent->name, "..", 2))
				dirent->inode = lost_found_ino;
			else
				ldirent->rec_len += dirent->rec_len;
			return 1;
		}
	return 0;
}