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
check_subnode(void * fdt,int parent,const char * name)19 static 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
check_path_offset(void * fdt,char * path,int offset)46 static 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
check_path_offset_namelen(void * fdt,char * path,int namelen,int offset)61 static 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
main(int argc,char * argv[])81 int 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