libsqfs: move dir reader code to sub directory, add internal header

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 0 insertions, 305 deletions

diff --git a/lib/sqfs/read_tree.c b/lib/sqfs/read_tree.c
deleted file mode 100644
index feda691..0000000
--- a/lib/sqfs/read_tree.c
+++ /dev/null
@@ -1,305 +0,0 @@
-/* SPDX-License-Identifier: LGPL-3.0-or-later */
-/*
- * read_tree.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#define SQFS_BUILDING_DLL
-#include "config.h"
-
-#include "sqfs/meta_reader.h"
-#include "sqfs/dir_reader.h"
-#include "sqfs/compressor.h"
-#include "sqfs/id_table.h"
-#include "sqfs/super.h"
-#include "sqfs/inode.h"
-#include "sqfs/error.h"
-#include "sqfs/dir.h"
-#include "util.h"
-
-#include <string.h>
-#include <stdlib.h>
-
-static int should_skip(int type, unsigned int flags)
-{
-	switch (type) {
-	case SQFS_INODE_BDEV:
-	case SQFS_INODE_CDEV:
-	case SQFS_INODE_EXT_CDEV:
-	case SQFS_INODE_EXT_BDEV:
-		return (flags & SQFS_TREE_NO_DEVICES);
-	case SQFS_INODE_SLINK:
-	case SQFS_INODE_EXT_SLINK:
-		return (flags & SQFS_TREE_NO_SLINKS);
-	case SQFS_INODE_SOCKET:
-	case SQFS_INODE_EXT_SOCKET:
-		return(flags & SQFS_TREE_NO_SOCKETS);
-	case SQFS_INODE_FIFO:
-	case SQFS_INODE_EXT_FIFO:
-		return (flags & SQFS_TREE_NO_FIFO);
-	default:
-		break;
-	}
-
-	return 0;
-}
-
-static bool would_be_own_parent(sqfs_tree_node_t *parent, sqfs_tree_node_t *n)
-{
-	sqfs_u32 inum = n->inode->base.inode_number;
-
-	while (parent != NULL) {
-		if (parent->inode->base.inode_number == inum)
-			return true;
-
-		parent = parent->parent;
-	}
-
-	return false;
-}
-
-static sqfs_tree_node_t *create_node(sqfs_inode_generic_t *inode,
-				     const char *name)
-{
-	sqfs_tree_node_t *n;
-
-	n = alloc_flex(sizeof(*n), 1, strlen(name) + 1);
-	if (n == NULL)
-		return NULL;
-
-	n->inode = inode;
-	strcpy((char *)n->name, name);
-	return n;
-}
-
-static int fill_dir(sqfs_dir_reader_t *dr, sqfs_tree_node_t *root,
-		    unsigned int flags)
-{
-	sqfs_tree_node_t *n, *prev, **tail;
-	sqfs_inode_generic_t *inode;
-	sqfs_dir_entry_t *ent;
-	int err;
-
-	tail = &root->children;
-
-	for (;;) {
-		err = sqfs_dir_reader_read(dr, &ent);
-		if (err > 0)
-			break;
-		if (err < 0)
-			return err;
-
-		if (should_skip(ent->type, flags)) {
-			free(ent);
-			continue;
-		}
-
-		err = sqfs_dir_reader_get_inode(dr, &inode);
-		if (err) {
-			free(ent);
-			return err;
-		}
-
-		n = create_node(inode, (const char *)ent->name);
-		free(ent);
-
-		if (n == NULL) {
-			free(inode);
-			return SQFS_ERROR_ALLOC;
-		}
-
-		if (would_be_own_parent(root, n)) {
-			free(n);
-			free(inode);
-			return SQFS_ERROR_LINK_LOOP;
-		}
-
-		*tail = n;
-		tail = &n->next;
-		n->parent = root;
-	}
-
-	n = root->children;
-	prev = NULL;
-
-	while (n != NULL) {
-		if (n->inode->base.type == SQFS_INODE_DIR ||
-		    n->inode->base.type == SQFS_INODE_EXT_DIR) {
-			if (!(flags & SQFS_TREE_NO_RECURSE)) {
-				err = sqfs_dir_reader_open_dir(dr, n->inode, 0);
-				if (err)
-					return err;
-
-				err = fill_dir(dr, n, flags);
-				if (err)
-					return err;
-			}
-
-			if (n->children == NULL &&
-			    (flags & SQFS_TREE_NO_EMPTY)) {
-				free(n->inode);
-				if (prev == NULL) {
-					root->children = root->children->next;
-					free(n);
-					n = root->children;
-				} else {
-					prev->next = n->next;
-					free(n);
-					n = prev->next;
-				}
-				continue;
-			}
-		}
-
-		prev = n;
-		n = n->next;
-	}
-
-	return 0;
-}
-
-static int resolve_ids(sqfs_tree_node_t *root, const sqfs_id_table_t *idtbl)
-{
-	sqfs_tree_node_t *it;
-	int err;
-
-	for (it = root->children; it != NULL; it = it->next)
-		resolve_ids(it, idtbl);
-
-	err = sqfs_id_table_index_to_id(idtbl, root->inode->base.uid_idx,
-					&root->uid);
-	if (err)
-		return err;
-
-	return sqfs_id_table_index_to_id(idtbl, root->inode->base.gid_idx,
-					 &root->gid);
-}
-
-void sqfs_dir_tree_destroy(sqfs_tree_node_t *root)
-{
-	sqfs_tree_node_t *it;
-
-	if (!root)
-		return;
-
-	while (root->children != NULL) {
-		it = root->children;
-		root->children = it->next;
-
-		sqfs_dir_tree_destroy(it);
-	}
-
-	free(root->inode);
-	free(root);
-}
-
-int sqfs_dir_reader_get_full_hierarchy(sqfs_dir_reader_t *rd,
-				       const sqfs_id_table_t *idtbl,
-				       const char *path, unsigned int flags,
-				       sqfs_tree_node_t **out)
-{
-	sqfs_tree_node_t *root, *tail, *new;
-	sqfs_inode_generic_t *inode;
-	sqfs_dir_entry_t *ent;
-	const char *ptr;
-	int ret;
-
-	if (flags & ~SQFS_TREE_ALL_FLAGS)
-		return SQFS_ERROR_UNSUPPORTED;
-
-	ret = sqfs_dir_reader_get_root_inode(rd, &inode);
-	if (ret)
-		return ret;
-
-	root = tail = create_node(inode, "");
-	if (root == NULL) {
-		free(inode);
-		return SQFS_ERROR_ALLOC;
-	}
-	inode = NULL;
-
-	while (path != NULL && *path != '\0') {
-		if (*path == '/') {
-			while (*path == '/')
-				++path;
-			continue;
-		}
-
-		ret = sqfs_dir_reader_open_dir(rd, tail->inode, 0);
-		if (ret)
-			goto fail;
-
-		ptr = strchr(path, '/');
-		if (ptr == NULL) {
-
-			if (ptr == NULL) {
-				for (ptr = path; *ptr != '\0'; ++ptr)
-					;
-			}
-		}
-
-		for (;;) {
-			ret = sqfs_dir_reader_read(rd, &ent);
-			if (ret < 0)
-				goto fail;
-			if (ret > 0) {
-				ret = SQFS_ERROR_NO_ENTRY;
-				goto fail;
-			}
-
-			ret = strncmp((const char *)ent->name,
-				      path, ptr - path);
-			if (ret == 0 && ent->name[ptr - path] == '\0')
-				break;
-			free(ent);
-		}
-
-		ret = sqfs_dir_reader_get_inode(rd, &inode);
-		if (ret) {
-			free(ent);
-			goto fail;
-		}
-
-		new = create_node(inode, (const char *)ent->name);
-		free(ent);
-
-		if (new == NULL) {
-			free(inode);
-			ret = SQFS_ERROR_ALLOC;
-			goto fail;
-		}
-
-		inode = NULL;
-		path = ptr;
-
-		if (flags & SQFS_TREE_STORE_PARENTS) {
-			tail->children = new;
-			new->parent = tail;
-			tail = new;
-		} else {
-			sqfs_dir_tree_destroy(root);
-			root = tail = new;
-		}
-	}
-
-	if (tail->inode->base.type == SQFS_INODE_DIR ||
-	    tail->inode->base.type == SQFS_INODE_EXT_DIR) {
-		ret = sqfs_dir_reader_open_dir(rd, tail->inode, 0);
-		if (ret)
-			goto fail;
-
-		ret = fill_dir(rd, tail, flags);
-		if (ret)
-			goto fail;
-	}
-
-	ret = resolve_ids(root, idtbl);
-	if (ret)
-		goto fail;
-
-	*out = root;
-	return 0;
-fail:
-	sqfs_dir_tree_destroy(root);
-	return ret;
-}