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      1 /*	$NetBSD: path-references.c,v 1.1.1.3 2019/12/22 12:34:06 skrll Exp $	*/
      2 
      3 // SPDX-License-Identifier: LGPL-2.1-or-later
      4 /*
      5  * libfdt - Flat Device Tree manipulation
      6  *	Testcase for string references in dtc
      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 
     19 static void check_ref(const void *fdt, int node, const char *checkpath)
     20 {
     21 	const char *p;
     22 	int len;
     23 
     24 	p = fdt_getprop(fdt, node, "ref", &len);
     25 	if (!p)
     26 		FAIL("fdt_getprop(%d, \"ref\"): %s", node, fdt_strerror(len));
     27 	if (!streq(p, checkpath))
     28 		FAIL("'ref' in node at %d has value \"%s\" instead of \"%s\"",
     29 		     node, p, checkpath);
     30 
     31 	p = fdt_getprop(fdt, node, "lref", &len);
     32 	if (!p)
     33 		FAIL("fdt_getprop(%d, \"lref\"): %s", node, fdt_strerror(len));
     34 	if (!streq(p, checkpath))
     35 		FAIL("'lref' in node at %d has value \"%s\" instead of \"%s\"",
     36 		     node, p, checkpath);
     37 }
     38 
     39 static void check_rref(const void *fdt)
     40 {
     41 	const char *p;
     42 	int len;
     43 
     44 	/* Check reference to root node */
     45 	p = fdt_getprop(fdt, 0, "rref", &len);
     46 	if (!p)
     47 		FAIL("fdt_getprop(0, \"rref\"): %s", fdt_strerror(len));
     48 	if (!streq(p, "/"))
     49 		FAIL("'rref' in root node has value \"%s\" instead of \"/\"",
     50 		     p);
     51 }
     52 
     53 int main(int argc, char *argv[])
     54 {
     55 	void *fdt;
     56 	const char *p;
     57 	int len, multilen;
     58 	int n1, n2, n3, n4;
     59 
     60 	test_init(argc, argv);
     61 	fdt = load_blob_arg(argc, argv);
     62 
     63 	n1 = fdt_path_offset(fdt, "/node1");
     64 	if (n1 < 0)
     65 		FAIL("fdt_path_offset(/node1): %s", fdt_strerror(n1));
     66 	n2 = fdt_path_offset(fdt, "/node2");
     67 	if (n2 < 0)
     68 		FAIL("fdt_path_offset(/node2): %s", fdt_strerror(n2));
     69 
     70 	check_ref(fdt, n1, "/node2");
     71 	check_ref(fdt, n2, "/node1");
     72 
     73 	/* Check multiple reference */
     74 	multilen = strlen("/node1") + strlen("/node2") + 2;
     75 	p = fdt_getprop(fdt, 0, "multiref", &len);
     76 	if (!p)
     77 		FAIL("fdt_getprop(0, \"multiref\"): %s", fdt_strerror(len));
     78 	if (len != multilen)
     79 		FAIL("multiref has wrong length, %d instead of %d",
     80 		     len, multilen);
     81 	if ((!streq(p, "/node1") || !streq(p + strlen("/node1") + 1, "/node2")))
     82 		FAIL("multiref has wrong value");
     83 
     84 	/* Check reference to nested nodes with common prefix */
     85 	n3 = fdt_path_offset(fdt, "/foo/baz");
     86 	if (n3 < 0)
     87 		FAIL("fdt_path_offset(/foo/baz): %s", fdt_strerror(n3));
     88 	n4 = fdt_path_offset(fdt, "/foobar/baz");
     89 	if (n4 < 0)
     90 		FAIL("fdt_path_offset(/foobar/baz): %s", fdt_strerror(n4));
     91 	check_ref(fdt, n3, "/foobar/baz");
     92 	check_ref(fdt, n4, "/foo/baz");
     93 
     94 	check_rref(fdt);
     95 
     96 	PASS();
     97 }
     98