1/*	$NetBSD: path_offset.c,v 1.1.1.3 2019/12/22 12:34:05 skrll Exp $	*/
2
3// SPDX-License-Identifier: LGPL-2.1-or-later
4/*
5 * libfdt - Flat Device Tree manipulation
6 *	Testcase for fdt_path_offset()
7 * Copyright (C) 2006 David Gibson, IBM Corporation.
8 */
9#include <stdlib.h>
10#include <stdio.h>
11#include <string.h>
12#include <stdint.h>
13
14#include <libfdt.h>
15
16#include "tests.h"
17#include "testdata.h"
18
19static int check_subnode(void *fdt, int parent, const char *name)
20{
21	int offset;
22	const struct fdt_node_header *nh;
23	uint32_t tag;
24
25	verbose_printf("Checking subnode \"%s\" of %d...", name, parent);
26	offset = fdt_subnode_offset(fdt, parent, name);
27	verbose_printf("offset %d...", offset);
28	if (offset < 0)
29		FAIL("fdt_subnode_offset(\"%s\"): %s", name, fdt_strerror(offset));
30	nh = fdt_offset_ptr(fdt, offset, sizeof(*nh));
31	verbose_printf("pointer %p\n", nh);
32	if (! nh)
33		FAIL("NULL retrieving subnode \"%s\"", name);
34
35	tag = fdt32_to_cpu(nh->tag);
36
37	if (tag != FDT_BEGIN_NODE)
38		FAIL("Incorrect tag 0x%08x on property \"%s\"", tag, name);
39	if (!nodename_eq(nh->name, name))
40		FAIL("Subnode name mismatch \"%s\" instead of \"%s\"",
41		     nh->name, name);
42
43	return offset;
44}
45
46static void check_path_offset(void *fdt, char *path, int offset)
47{
48	int rc;
49
50	verbose_printf("Checking offset of \"%s\" is %d...\n", path, offset);
51
52	rc = fdt_path_offset(fdt, path);
53	if (rc < 0)
54		FAIL("fdt_path_offset(\"%s\") failed: %s",
55		     path,  fdt_strerror(rc));
56	if (rc != offset)
57		FAIL("fdt_path_offset(\"%s\") returned incorrect offset"
58		     " %d instead of %d", path, rc, offset);
59}
60
61static void check_path_offset_namelen(void *fdt, char *path, int namelen,
62				      int offset)
63{
64	int rc;
65
66	verbose_printf("Checking offset of \"%s\" [first %d characters]"
67		       " is %d...\n", path, namelen, offset);
68
69	rc = fdt_path_offset_namelen(fdt, path, namelen);
70	if (rc == offset)
71		return;
72
73	if (rc < 0)
74		FAIL("fdt_path_offset_namelen(\"%s\", %d) failed: %s",
75		     path, namelen, fdt_strerror(rc));
76	else
77		FAIL("fdt_path_offset_namelen(\"%s\", %d) returned incorrect"
78		     " offset %d instead of %d", path, namelen, rc, offset);
79}
80
81int main(int argc, char *argv[])
82{
83	void *fdt;
84	int subnode1_offset, subnode2_offset;
85	int subsubnode1_offset, subsubnode2_offset, subsubnode2_offset2;
86
87	test_init(argc, argv);
88	fdt = load_blob_arg(argc, argv);
89
90	check_path_offset(fdt, "/", 0);
91
92	subnode1_offset = check_subnode(fdt, 0, "subnode@1");
93	subnode2_offset = check_subnode(fdt, 0, "subnode@2");
94
95	check_path_offset(fdt, "/subnode@1", subnode1_offset);
96	check_path_offset(fdt, "/subnode@2", subnode2_offset);
97
98	subsubnode1_offset = check_subnode(fdt, subnode1_offset, "subsubnode");
99	subsubnode2_offset = check_subnode(fdt, subnode2_offset, "subsubnode@0");
100	subsubnode2_offset2 = check_subnode(fdt, subnode2_offset, "subsubnode");
101
102	check_path_offset(fdt, "/subnode@1/subsubnode", subsubnode1_offset);
103	check_path_offset(fdt, "/subnode@2/subsubnode@0", subsubnode2_offset);
104	check_path_offset(fdt, "/subnode@2/subsubnode", subsubnode2_offset2);
105
106	/* Test paths with extraneous separators */
107	check_path_offset(fdt, "//", 0);
108	check_path_offset(fdt, "///", 0);
109	check_path_offset(fdt, "//subnode@1", subnode1_offset);
110	check_path_offset(fdt, "/subnode@1/", subnode1_offset);
111	check_path_offset(fdt, "//subnode@1///", subnode1_offset);
112	check_path_offset(fdt, "/subnode@2////subsubnode", subsubnode2_offset2);
113
114	/* Test fdt_path_offset_namelen() */
115	check_path_offset_namelen(fdt, "/subnode@1", 1, 0);
116	check_path_offset_namelen(fdt, "/subnode@1/subsubnode", 10, subnode1_offset);
117	check_path_offset_namelen(fdt, "/subnode@1/subsubnode", 11, subnode1_offset);
118	check_path_offset_namelen(fdt, "/subnode@2TRAILINGGARBAGE", 10, subnode2_offset);
119	check_path_offset_namelen(fdt, "/subnode@2TRAILINGGARBAGE", 11, -FDT_ERR_NOTFOUND);
120	check_path_offset_namelen(fdt, "/subnode@2/subsubnode@0/more", 23, subsubnode2_offset2);
121	check_path_offset_namelen(fdt, "/subnode@2/subsubnode@0/more", 22, -FDT_ERR_NOTFOUND);
122	check_path_offset_namelen(fdt, "/subnode@2/subsubnode@0/more", 24, subsubnode2_offset2);
123	check_path_offset_namelen(fdt, "/subnode@2/subsubnode@0/more", 25, -FDT_ERR_NOTFOUND);
124
125	PASS();
126}
127