1 /* $NetBSD: parent_offset.c,v 1.1.1.3 2019/12/22 12:34:07 skrll Exp $ */
2
3 // SPDX-License-Identifier: LGPL-2.1-or-later
4 /*
5 * libfdt - Flat Device Tree manipulation
6 * Testcase for fdt_parent_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
path_parent_len(const char * path)19 static int path_parent_len(const char *path)
20 {
21 const char *p = strrchr(path, '/');
22
23 if (!p)
24 TEST_BUG();
25 if (p == path)
26 return 1;
27 else
28 return p - path;
29 }
30
check_path(struct fdt_header * fdt,const char * path)31 static void check_path(struct fdt_header *fdt, const char *path)
32 {
33 char *parentpath;
34 int nodeoffset, parentoffset, parentpathoffset, pathparentlen;
35
36 pathparentlen = path_parent_len(path);
37 parentpath = alloca(pathparentlen + 1);
38 strncpy(parentpath, path, pathparentlen);
39 parentpath[pathparentlen] = '\0';
40
41 verbose_printf("Path: \"%s\"\tParent: \"%s\"\n", path, parentpath);
42
43 nodeoffset = fdt_path_offset(fdt, path);
44 if (nodeoffset < 0)
45 FAIL("fdt_path_offset(%s): %s", path, fdt_strerror(nodeoffset));
46
47 parentpathoffset = fdt_path_offset(fdt, parentpath);
48 if (parentpathoffset < 0)
49 FAIL("fdt_path_offset(%s): %s", parentpath,
50 fdt_strerror(parentpathoffset));
51
52 parentoffset = fdt_parent_offset(fdt, nodeoffset);
53 if (parentoffset < 0)
54 FAIL("fdt_parent_offset(): %s", fdt_strerror(parentoffset));
55
56 if (parentoffset != parentpathoffset)
57 FAIL("fdt_parent_offset() returns %d instead of %d",
58 parentoffset, parentpathoffset);
59 }
60
main(int argc,char * argv[])61 int main(int argc, char *argv[])
62 {
63 void *fdt;
64 int err;
65
66 test_init(argc, argv);
67 fdt = load_blob_arg(argc, argv);
68
69 check_path(fdt, "/subnode@1");
70 check_path(fdt, "/subnode@2");
71 check_path(fdt, "/subnode@1/subsubnode");
72 check_path(fdt, "/subnode@2/subsubnode@0");
73 err = fdt_parent_offset(fdt, 0);
74 if (err != -FDT_ERR_NOTFOUND)
75 FAIL("fdt_parent_offset(/) returns %d instead of "
76 "-FDT_ERR_NOTFOUND", err);
77
78 PASS();
79 }
80