get_path.c revision 38ad79d33946590c862567c7cbdf25b5a46d8149 
1/*
2 * libfdt - Flat Device Tree manipulation
3 *	Testcase for fdt_get_path()
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
30#define POISON	('\xff')
31
32static void check_path_buf(void *fdt, const char *path, int pathlen, int buflen)
33{
34	int offset;
35	char buf[buflen+1];
36	int len;
37
38	offset = fdt_path_offset(fdt, path);
39	if (offset < 0)
40		FAIL("Couldn't find path \"%s\": %s", path, fdt_strerror(offset));
41
42	memset(buf, POISON, sizeof(buf)); /* poison the buffer */
43
44	len = fdt_get_path(fdt, offset, buf, buflen);
45	verbose_printf("get_path() %s -> %d -> %s\n", path, offset, buf);
46
47	if (buflen <= pathlen) {
48		if (len != -FDT_ERR_NOSPACE)
49			FAIL("fdt_get_path([%d bytes]) returns %d with "
50			     "insufficient buffer space", buflen, len);
51	} else {
52		if (len < 0)
53			FAIL("fdt_get_path([%d bytes]): %s", buflen,
54			     fdt_strerror(len));
55		if (len != 0)
56			FAIL("fdt_get_path([%d bytes]) returns %d "
57			     "instead of 0", buflen, len);
58		if (strcmp(buf, path) != 0)
59			FAIL("fdt_get_path([%d bytes]) returns \"%s\" "
60			     "instead of \"%s\"", buflen, buf, path);
61	}
62
63	if (buf[buflen] != POISON)
64		FAIL("fdt_get_path([%d bytes]) overran buffer", buflen);
65}
66
67static void check_path(void *fdt, const char *path)
68{
69	int pathlen = strlen(path);
70
71	check_path_buf(fdt, path, pathlen, 1024);
72	check_path_buf(fdt, path, pathlen, pathlen+1);
73	check_path_buf(fdt, path, pathlen, pathlen);
74	check_path_buf(fdt, path, pathlen, 0);
75	check_path_buf(fdt, path, pathlen, 2);
76}
77
78int main(int argc, char *argv[])
79{
80	void *fdt;
81
82	test_init(argc, argv);
83	fdt = load_blob_arg(argc, argv);
84
85	check_path(fdt, "/");
86	check_path(fdt, "/subnode@1");
87	check_path(fdt, "/subnode@2");
88	check_path(fdt, "/subnode@1/subsubnode");
89	check_path(fdt, "/subnode@2/subsubnode@0");
90
91	PASS();
92}
93