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/*
* libfdt - Flat Device Tree manipulation
* Testcase for string handling
* Copyright (C) 2015 NVIDIA Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <libfdt.h>
#include "tests.h"
#include "testdata.h"
static void check_expected_failure(const void *fdt, const char *path,
const char *property)
{
int offset, err;
offset = fdt_path_offset(fdt, "/");
if (offset < 0)
FAIL("Couldn't find path %s", path);
err = fdt_stringlist_count(fdt, offset, "#address-cells");
if (err != -FDT_ERR_BADVALUE)
FAIL("unexpectedly succeeded in parsing #address-cells\n");
err = fdt_stringlist_search(fdt, offset, "#address-cells", "foo");
if (err != -FDT_ERR_BADVALUE)
FAIL("found string in #address-cells: %d\n", err);
/*
* Note that the #address-cells property contains a small 32-bit
* unsigned integer, hence some bytes will be zero, and searching for
* the empty string will succeed.
*
* The reason for this oddity is that the function will exit when the
* first occurrence of the string is found, but in order to determine
* that the property does not contain a valid string list it would
* need to process the whole value.
*/
err = fdt_stringlist_search(fdt, offset, "#address-cells", "");
if (err != 0)
FAIL("empty string not found in #address-cells: %d\n", err);
/*
* fdt_get_string() can successfully extract strings from non-string
* properties. This is because it doesn't necessarily parse the whole
* property value, which would be necessary for it to determine if a
* valid string or string list is present.
*/
}
static void check_string_count(const void *fdt, const char *path,
const char *property, int count)
{
int offset, err;
offset = fdt_path_offset(fdt, path);
if (offset < 0)
FAIL("Couldn't find path %s", path);
err = fdt_stringlist_count(fdt, offset, property);
if (err < 0)
FAIL("Couldn't count strings in property %s of node %s: %d\n",
property, path, err);
if (err != count)
FAIL("String count for property %s of node %s is %d instead of %d\n",
path, property, err, count);
}
static void check_string_index(const void *fdt, const char *path,
const char *property, const char *string,
int idx)
{
int offset, err;
offset = fdt_path_offset(fdt, path);
if (offset < 0)
FAIL("Couldn't find path %s", path);
err = fdt_stringlist_search(fdt, offset, property, string);
if (err != idx)
FAIL("Index of %s in property %s of node %s is %d, expected %d\n",
string, property, path, err, idx);
}
static void check_string(const void *fdt, const char *path,
const char *property, int idx,
const char *string)
{
const char *result;
int offset, len;
offset = fdt_path_offset(fdt, path);
if (offset < 0)
FAIL("Couldn't find path %s", path);
result = fdt_stringlist_get(fdt, offset, property, idx, &len);
if (!result)
FAIL("Couldn't extract string %d from property %s of node %s: %d\n",
idx, property, path, len);
if (strcmp(string, result) != 0)
FAIL("String %d in property %s of node %s is %s, expected %s\n",
idx, property, path, result, string);
}
int main(int argc, char *argv[])
{
void *fdt;
if (argc != 2)
CONFIG("Usage: %s <dtb file>\n", argv[0]);
test_init(argc, argv);
fdt = load_blob(argv[1]);
check_expected_failure(fdt, "/", "#address-cells");
check_expected_failure(fdt, "/", "#size-cells");
check_string_count(fdt, "/", "compatible", 1);
check_string_count(fdt, "/device", "compatible", 2);
check_string_count(fdt, "/device", "big-endian", 0);
check_string_index(fdt, "/", "compatible", "test-strings", 0);
check_string_index(fdt, "/device", "compatible", "foo", 0);
check_string_index(fdt, "/device", "compatible", "bar", 1);
check_string_index(fdt, "/device", "big-endian", "baz", -1);
check_string(fdt, "/", "compatible", 0, "test-strings");
check_string(fdt, "/device", "compatible", 0, "foo");
check_string(fdt, "/device", "compatible", 1, "bar");
PASS();
}
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