1/* $NetBSD: parent_offset.c,v 1.1.1.3 2019/12/22 12:34:07 skrll Exp $ */ 2 3// SPDX-License-Identifier: LGPL-2.1-or-later 4/* 5 * libfdt - Flat Device Tree manipulation 6 * Testcase for fdt_parent_offset() 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 19static int path_parent_len(const char *path) 20{ 21 const char *p = strrchr(path, '/'); 22 23 if (!p) 24 TEST_BUG(); 25 if (p == path) 26 return 1; 27 else 28 return p - path; 29} 30 31static void check_path(struct fdt_header *fdt, const char *path) 32{ 33 char *parentpath; 34 int nodeoffset, parentoffset, parentpathoffset, pathparentlen; 35 36 pathparentlen = path_parent_len(path); 37 parentpath = alloca(pathparentlen + 1); 38 strncpy(parentpath, path, pathparentlen); 39 parentpath[pathparentlen] = '\0'; 40 41 verbose_printf("Path: \"%s\"\tParent: \"%s\"\n", path, parentpath); 42 43 nodeoffset = fdt_path_offset(fdt, path); 44 if (nodeoffset < 0) 45 FAIL("fdt_path_offset(%s): %s", path, fdt_strerror(nodeoffset)); 46 47 parentpathoffset = fdt_path_offset(fdt, parentpath); 48 if (parentpathoffset < 0) 49 FAIL("fdt_path_offset(%s): %s", parentpath, 50 fdt_strerror(parentpathoffset)); 51 52 parentoffset = fdt_parent_offset(fdt, nodeoffset); 53 if (parentoffset < 0) 54 FAIL("fdt_parent_offset(): %s", fdt_strerror(parentoffset)); 55 56 if (parentoffset != parentpathoffset) 57 FAIL("fdt_parent_offset() returns %d instead of %d", 58 parentoffset, parentpathoffset); 59} 60 61int main(int argc, char *argv[]) 62{ 63 void *fdt; 64 int err; 65 66 test_init(argc, argv); 67 fdt = load_blob_arg(argc, argv); 68 69 check_path(fdt, "/subnode@1"); 70 check_path(fdt, "/subnode@2"); 71 check_path(fdt, "/subnode@1/subsubnode"); 72 check_path(fdt, "/subnode@2/subsubnode@0"); 73 err = fdt_parent_offset(fdt, 0); 74 if (err != -FDT_ERR_NOTFOUND) 75 FAIL("fdt_parent_offset(/) returns %d instead of " 76 "-FDT_ERR_NOTFOUND", err); 77 78 PASS(); 79} 80