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// SPDX-License-Identifier: LGPL-2.1-or-later
/*
* libfdt - Flat Device Tree manipulation
* Testcase for fdt_supernode_atdepth_offset()
* Copyright (C) 2006 David Gibson, IBM Corporation.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <libfdt.h>
#include "tests.h"
#include "testdata.h"
static int path_depth(const char *path)
{
const char *p;
int depth = 0;
if (path[0] != '/')
TEST_BUG();
if (strcmp(path, "/") == 0)
return 0;
for (p = path; *p; p++)
if (*p == '/')
depth++;
/* Special case for path == "/" */
if (p == (path + 1))
return 0;
else
return depth;
}
static int path_prefix(const char *path, int depth)
{
const char *p;
int i;
if (path[0] != '/')
TEST_BUG();
if (depth == 0)
return 1;
p = path;
for (i = 0; i < depth; i++)
p = p+1 + strcspn(p+1, "/");
return p - path;
}
static void check_supernode_atdepth(struct fdt_header *fdt, const char *path,
int depth)
{
int pdepth = path_depth(path);
char *superpath;
int nodeoffset, supernodeoffset, superpathoffset, pathprefixlen;
int nodedepth;
pathprefixlen = path_prefix(path, depth);
superpath = alloca(pathprefixlen + 1);
strncpy(superpath, path, pathprefixlen);
superpath[pathprefixlen] = '\0';
verbose_printf("Path %s (%d), depth %d, supernode is %s\n",
path, pdepth, depth, superpath);
nodeoffset = fdt_path_offset(fdt, path);
if (nodeoffset < 0)
FAIL("fdt_path_offset(%s): %s", path, fdt_strerror(nodeoffset));
superpathoffset = fdt_path_offset(fdt, superpath);
if (superpathoffset < 0)
FAIL("fdt_path_offset(%s): %s", superpath,
fdt_strerror(superpathoffset));
supernodeoffset = fdt_supernode_atdepth_offset(fdt, nodeoffset,
depth, &nodedepth);
if (supernodeoffset < 0)
FAIL("fdt_supernode_atdepth_offset(): %s",
fdt_strerror(supernodeoffset));
if (supernodeoffset != superpathoffset)
FAIL("fdt_supernode_atdepth_offset() returns %d instead of %d",
supernodeoffset, superpathoffset);
if (nodedepth != pdepth)
FAIL("fdt_supernode_atdept_offset() returns node depth %d "
"instead of %d", nodedepth, pdepth);
}
static void check_supernode_overdepth(struct fdt_header *fdt, const char *path)
{
int pdepth = path_depth(path);
int nodeoffset, err;
nodeoffset = fdt_path_offset(fdt, path);
if (nodeoffset < 0)
FAIL("fdt_path_offset(%s): %s", path, fdt_strerror(nodeoffset));
err = fdt_supernode_atdepth_offset(fdt, nodeoffset, pdepth + 1, NULL);
if (err != -FDT_ERR_NOTFOUND)
FAIL("fdt_supernode_atdept_offset(%s, %d) returns %d instead "
"of FDT_ERR_NOTFOUND", path, pdepth+1, err);
}
static void check_path(struct fdt_header *fdt, const char *path)
{
int i;
for (i = 0; i <= path_depth(path); i++)
check_supernode_atdepth(fdt, path, i);
check_supernode_overdepth(fdt, path);
}
int main(int argc, char *argv[])
{
void *fdt;
test_init(argc, argv);
fdt = load_blob_arg(argc, argv);
check_path(fdt, "/");
check_path(fdt, "/subnode@1");
check_path(fdt, "/subnode@2");
check_path(fdt, "/subnode@1/subsubnode");
check_path(fdt, "/subnode@2/subsubnode@0");
PASS();
}
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