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 <fdt.h>

    26 #include <libfdt.h>

    27 

    28 #include "tests.h"

    29 #include "testdata.h"

    30 

    31 int path_parent_len(const char *path)

    32 {

    33 	const char *p = strrchr(path, '/');

    34 

    35 	if (!p)

    36 		TEST_BUG();

    37 	if (p == path)

    38 		return 1;

    39 	else

    40 		return p - path;

    41 }

    42 

    43 void check_path(struct fdt_header *fdt, const char *path)

    44 {

    45 	char *parentpath;

    46 	int nodeoffset, parentoffset, parentpathoffset, pathparentlen;

    47 

    48 	pathparentlen = path_parent_len(path);

    49 	parentpath = alloca(pathparentlen + 1);

    50 	strncpy(parentpath, path, pathparentlen);

    51 	parentpath[pathparentlen] = '\0';

    52 

    53 	verbose_printf("Path: \"%s\"\tParent: \"%s\"\n", path, parentpath);

    54 

    55 	nodeoffset = fdt_path_offset(fdt, path);

    56 	if (nodeoffset < 0)

    57 		FAIL("fdt_path_offset(%s): %s", path, fdt_strerror(nodeoffset));

    58 

    59 	parentpathoffset = fdt_path_offset(fdt, parentpath);

    60 	if (parentpathoffset < 0)

    61 		FAIL("fdt_path_offset(%s): %s", parentpath,

    62 		     fdt_strerror(parentpathoffset));

    63 

    64 	parentoffset = fdt_parent_offset(fdt, nodeoffset);

    65 	if (parentoffset < 0)

    66 		FAIL("fdt_parent_offset(): %s", fdt_strerror(parentoffset));

    67 

    68 	if (parentoffset != parentpathoffset)

    69 		FAIL("fdt_parent_offset() returns %d instead of %d",

    70 		     parentoffset, parentpathoffset);

    71 }

    72 

    73 int main(int argc, char *argv[])

    74 {

    75 	void *fdt;

    76 	int err;

    77 

    78 	test_init(argc, argv);

    79 	fdt = load_blob_arg(argc, argv);

    80 

    81 	check_path(fdt, "/subnode@1");

    82 	check_path(fdt, "/subnode@2");

    83 	check_path(fdt, "/subnode@1/subsubnode");

    84 	check_path(fdt, "/subnode@2/subsubnode@0");

    85 	err = fdt_parent_offset(fdt, 0);

    86 	if (err != -FDT_ERR_NOTFOUND)

    87 		FAIL("fdt_parent_offset(/) returns %d instead of "

    88 		     "-FDT_ERR_NOTFOUND", err);

    89 

    90 	PASS();

    91 }