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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* gen_inode_table.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#include "fstree.h"
#include "util.h"
#include <stdlib.h>
#include <stdio.h>
static size_t count_nodes(tree_node_t *root)
{
tree_node_t *n = root->data.dir.children;
size_t count = 1;
while (n != NULL) {
if (S_ISDIR(n->mode)) {
count += count_nodes(n);
} else {
++count;
}
n = n->next;
}
return count;
}
static void map_child_nodes(fstree_t *fs, tree_node_t *root, size_t *counter)
{
bool has_subdirs = false;
tree_node_t *it;
for (it = root->data.dir.children; it != NULL; it = it->next) {
if (S_ISDIR(it->mode)) {
has_subdirs = true;
break;
}
}
if (has_subdirs) {
for (it = root->data.dir.children; it != NULL; it = it->next) {
if (S_ISDIR(it->mode))
map_child_nodes(fs, it, counter);
}
}
for (it = root->data.dir.children; it != NULL; it = it->next) {
it->inode_num = *counter;
*counter += 1;
fs->inode_table[it->inode_num - 1] = it;
}
}
int fstree_gen_inode_table(fstree_t *fs)
{
size_t inum = 1;
fs->inode_tbl_size = count_nodes(fs->root);
fs->inode_table = alloc_array(sizeof(tree_node_t *),
fs->inode_tbl_size);
if (fs->inode_table == NULL) {
perror("allocating inode table");
return -1;
}
map_child_nodes(fs, fs->root, &inum);
fs->root->inode_num = inum;
fs->inode_table[inum - 1] = fs->root;
return 0;
}
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