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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* compare_dir.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "sqfsdiff.h"
int compare_dir_entries(sqfsdiff_t *sd, tree_node_t *old, tree_node_t *new)
{
tree_node_t *old_it = old->data.dir->children, *old_prev = NULL;
tree_node_t *new_it = new->data.dir->children, *new_prev = NULL;
int ret, result = 0;
char *path;
while (old_it != NULL || new_it != NULL) {
if (old_it != NULL && new_it != NULL) {
ret = strcmp(old_it->name, new_it->name);
} else if (old_it == NULL) {
ret = 1;
} else {
ret = -1;
}
if (ret < 0) {
result = 1;
path = node_path(old_it);
if (path == NULL)
return -1;
if ((sd->compare_flags & COMPARE_EXTRACT_FILES) &&
S_ISREG(old_it->mode)) {
if (extract_files(sd, old_it->data.file,
NULL, path)) {
return -1;
}
}
fprintf(stdout, "< %s\n", path);
free(path);
if (old_prev == NULL) {
old->data.dir->children = old_it->next;
free(old_it);
old_it = old->data.dir->children;
} else {
old_prev->next = old_it->next;
free(old_it);
old_it = old_prev->next;
}
} else if (ret > 0) {
result = 1;
path = node_path(new_it);
if (path == NULL)
return -1;
if ((sd->compare_flags & COMPARE_EXTRACT_FILES) &&
S_ISREG(new_it->mode)) {
if (extract_files(sd, NULL, new_it->data.file,
path)) {
return -1;
}
}
fprintf(stdout, "> %s\n", path);
free(path);
if (new_prev == NULL) {
new->data.dir->children = new_it->next;
free(new_it);
new_it = new->data.dir->children;
} else {
new_prev->next = new_it->next;
free(new_it);
new_it = new_prev->next;
}
} else {
old_prev = old_it;
old_it = old_it->next;
new_prev = new_it;
new_it = new_it->next;
}
}
return result;
}
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