1 files changed, 98 insertions, 0 deletions

diff --git a/src/dtc/tests/subnode_offset.c b/src/dtc/tests/subnode_offset.c
new file mode 100644
index 0000000..231fcb5
--- /dev/null
+++ b/src/dtc/tests/subnode_offset.c
@@ -0,0 +1,98 @@
+/*
+ * libfdt - Flat Device Tree manipulation
+ *	Testcase for fdt_subnode_offset()
+ * Copyright (C) 2006 David Gibson, IBM 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 int check_subnode(struct fdt_header *fdt, int parent, const char *name)
+{
+	int offset;
+	const struct fdt_node_header *nh;
+	uint32_t tag;
+
+	verbose_printf("Checking subnode \"%s\" of %d...", name, parent);
+	offset = fdt_subnode_offset(fdt, parent, name);
+	verbose_printf("offset %d...", offset);
+	if (offset < 0)
+		FAIL("fdt_subnode_offset(\"%s\"): %s", name, fdt_strerror(offset));
+	nh = fdt_offset_ptr(fdt, offset, sizeof(*nh));
+	verbose_printf("pointer %p\n", nh);
+	if (! nh)
+		FAIL("NULL retrieving subnode \"%s\"", name);
+
+	tag = fdt32_to_cpu(nh->tag);
+
+	if (tag != FDT_BEGIN_NODE)
+		FAIL("Incorrect tag 0x%08x on property \"%s\"", tag, name);
+	if (!nodename_eq(nh->name, name))
+		FAIL("Subnode name mismatch \"%s\" instead of \"%s\"",
+		     nh->name, name);
+
+	return offset;
+}
+
+int main(int argc, char *argv[])
+{
+	void *fdt;
+	int subnode1_offset, subnode2_offset;
+	int subsubnode1_offset, subsubnode2_offset, subsubnode2_offset2;
+	int ss12_off, ss21_off;
+
+	test_init(argc, argv);
+	fdt = load_blob_arg(argc, argv);
+
+	subnode1_offset = check_subnode(fdt, 0, "subnode@1");
+	subnode2_offset = check_subnode(fdt, 0, "subnode@2");
+
+	if (subnode1_offset == subnode2_offset)
+		FAIL("Different subnodes have same offset");
+
+	check_property_cell(fdt, subnode1_offset, "prop-int", TEST_VALUE_1);
+	check_property_cell(fdt, subnode2_offset, "prop-int", TEST_VALUE_2);
+
+	subsubnode1_offset = check_subnode(fdt, subnode1_offset, "subsubnode");
+	subsubnode2_offset = check_subnode(fdt, subnode2_offset, "subsubnode@0");
+	subsubnode2_offset2 = check_subnode(fdt, subnode2_offset, "subsubnode");
+
+	check_property_cell(fdt, subsubnode1_offset, "prop-int", TEST_VALUE_1);
+	check_property_cell(fdt, subsubnode2_offset, "prop-int", TEST_VALUE_2);
+	check_property_cell(fdt, subsubnode2_offset2, "prop-int", TEST_VALUE_2);
+
+	if (subsubnode2_offset != subsubnode2_offset2)
+		FAIL("Different offsets with and without unit address");
+
+	check_subnode(fdt, subnode1_offset, "ss1");
+	ss21_off = fdt_subnode_offset(fdt, subnode2_offset, "ss1");
+	if (ss21_off != -FDT_ERR_NOTFOUND)
+		FAIL("Incorrectly found ss1 in subnode2");
+
+	ss12_off = fdt_subnode_offset(fdt, subnode1_offset, "ss2");
+	if (ss12_off != -FDT_ERR_NOTFOUND)
+		FAIL("Incorrectly found ss2 in subnode1");
+	check_subnode(fdt, subnode2_offset, "ss2");
+
+	PASS();
+}