1 /*
2 * libfdt - Flat Device Tree manipulation
3 * Testcase for fdt_parent_offset()
4 * Copyright (C) 2006 David Gibson, IBM Corporation.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation; either version 2.1 of
9 * the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20 #include <stdlib.h>
21 #include <stdio.h>
22 #include <string.h>
23 #include <stdint.h>
24
25 #include <libfdt.h>
26
27 #include "tests.h"
28 #include "testdata.h"
29
path_parent_len(const char * path)30 static int path_parent_len(const char *path)
31 {
32 const char *p = strrchr(path, '/');
33
34 if (!p)
35 TEST_BUG();
36 if (p == path)
37 return 1;
38 else
39 return p - path;
40 }
41
check_path(struct fdt_header * fdt,const char * path)42 static void check_path(struct fdt_header *fdt, const char *path)
43 {
44 char *parentpath;
45 int nodeoffset, parentoffset, parentpathoffset, pathparentlen;
46
47 pathparentlen = path_parent_len(path);
48 parentpath = alloca(pathparentlen + 1);
49 strncpy(parentpath, path, pathparentlen);
50 parentpath[pathparentlen] = '\0';
51
52 verbose_printf("Path: \"%s\"\tParent: \"%s\"\n", path, parentpath);
53
54 nodeoffset = fdt_path_offset(fdt, path);
55 if (nodeoffset < 0)
56 FAIL("fdt_path_offset(%s): %s", path, fdt_strerror(nodeoffset));
57
58 parentpathoffset = fdt_path_offset(fdt, parentpath);
59 if (parentpathoffset < 0)
60 FAIL("fdt_path_offset(%s): %s", parentpath,
61 fdt_strerror(parentpathoffset));
62
63 parentoffset = fdt_parent_offset(fdt, nodeoffset);
64 if (parentoffset < 0)
65 FAIL("fdt_parent_offset(): %s", fdt_strerror(parentoffset));
66
67 if (parentoffset != parentpathoffset)
68 FAIL("fdt_parent_offset() returns %d instead of %d",
69 parentoffset, parentpathoffset);
70 }
71
main(int argc,char * argv[])72 int main(int argc, char *argv[])
73 {
74 void *fdt;
75 int err;
76
77 test_init(argc, argv);
78 fdt = load_blob_arg(argc, argv);
79
80 check_path(fdt, "/subnode@1");
81 check_path(fdt, "/subnode@2");
82 check_path(fdt, "/subnode@1/subsubnode");
83 check_path(fdt, "/subnode@2/subsubnode@0");
84 err = fdt_parent_offset(fdt, 0);
85 if (err != -FDT_ERR_NOTFOUND)
86 FAIL("fdt_parent_offset(/) returns %d instead of "
87 "-FDT_ERR_NOTFOUND", err);
88
89 PASS();
90 }
91