1/* 2 * libfdt - Flat Device Tree manipulation 3 * Testcase for string handling 4 * Copyright (C) 2015 NVIDIA Corporation 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public License 8 * as published by the Free Software Foundation; either version 2.1 of 9 * the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#include <stdlib.h> 22#include <stdio.h> 23#include <string.h> 24#include <stdint.h> 25 26#include <libfdt.h> 27 28#include "tests.h" 29#include "testdata.h" 30 31static void check_expected_failure(const void *fdt, const char *path, 32 const char *property) 33{ 34 int offset, err; 35 36 offset = fdt_path_offset(fdt, "/"); 37 if (offset < 0) 38 FAIL("Couldn't find path %s", path); 39 40 err = fdt_stringlist_count(fdt, offset, "#address-cells"); 41 if (err != -FDT_ERR_BADVALUE) 42 FAIL("unexpectedly succeeded in parsing #address-cells\n"); 43 44 err = fdt_stringlist_search(fdt, offset, "#address-cells", "foo"); 45 if (err != -FDT_ERR_BADVALUE) 46 FAIL("found string in #address-cells: %d\n", err); 47 48 /* 49 * Note that the #address-cells property contains a small 32-bit 50 * unsigned integer, hence some bytes will be zero, and searching for 51 * the empty string will succeed. 52 * 53 * The reason for this oddity is that the function will exit when the 54 * first occurrence of the string is found, but in order to determine 55 * that the property does not contain a valid string list it would 56 * need to process the whole value. 57 */ 58 err = fdt_stringlist_search(fdt, offset, "#address-cells", ""); 59 if (err != 0) 60 FAIL("empty string not found in #address-cells: %d\n", err); 61 62 /* 63 * fdt_get_string() can successfully extract strings from non-string 64 * properties. This is because it doesn't necessarily parse the whole 65 * property value, which would be necessary for it to determine if a 66 * valid string or string list is present. 67 */ 68} 69 70static void check_string_count(const void *fdt, const char *path, 71 const char *property, int count) 72{ 73 int offset, err; 74 75 offset = fdt_path_offset(fdt, path); 76 if (offset < 0) 77 FAIL("Couldn't find path %s", path); 78 79 err = fdt_stringlist_count(fdt, offset, property); 80 if (err < 0) 81 FAIL("Couldn't count strings in property %s of node %s: %d\n", 82 property, path, err); 83 84 if (err != count) 85 FAIL("String count for property %s of node %s is %d instead of %d\n", 86 path, property, err, count); 87} 88 89static void check_string_index(const void *fdt, const char *path, 90 const char *property, const char *string, 91 int idx) 92{ 93 int offset, err; 94 95 offset = fdt_path_offset(fdt, path); 96 if (offset < 0) 97 FAIL("Couldn't find path %s", path); 98 99 err = fdt_stringlist_search(fdt, offset, property, string); 100 101 if (err != idx) 102 FAIL("Index of %s in property %s of node %s is %d, expected %d\n", 103 string, property, path, err, idx); 104} 105 106static void check_string(const void *fdt, const char *path, 107 const char *property, int idx, 108 const char *string) 109{ 110 const char *result; 111 int offset, len; 112 113 offset = fdt_path_offset(fdt, path); 114 if (offset < 0) 115 FAIL("Couldn't find path %s", path); 116 117 result = fdt_stringlist_get(fdt, offset, property, idx, &len); 118 if (!result) 119 FAIL("Couldn't extract string %d from property %s of node %s: %d\n", 120 idx, property, path, len); 121 122 if (strcmp(string, result) != 0) 123 FAIL("String %d in property %s of node %s is %s, expected %s\n", 124 idx, property, path, result, string); 125} 126 127int main(int argc, char *argv[]) 128{ 129 void *fdt; 130 131 if (argc != 2) 132 CONFIG("Usage: %s <dtb file>\n", argv[0]); 133 134 test_init(argc, argv); 135 fdt = load_blob(argv[1]); 136 137 check_expected_failure(fdt, "/", "#address-cells"); 138 check_expected_failure(fdt, "/", "#size-cells"); 139 140 check_string_count(fdt, "/", "compatible", 1); 141 check_string_count(fdt, "/device", "compatible", 2); 142 check_string_count(fdt, "/device", "big-endian", 0); 143 144 check_string_index(fdt, "/", "compatible", "test-strings", 0); 145 check_string_index(fdt, "/device", "compatible", "foo", 0); 146 check_string_index(fdt, "/device", "compatible", "bar", 1); 147 check_string_index(fdt, "/device", "big-endian", "baz", -1); 148 149 check_string(fdt, "/", "compatible", 0, "test-strings"); 150 check_string(fdt, "/device", "compatible", 0, "foo"); 151 check_string(fdt, "/device", "compatible", 1, "bar"); 152 153 PASS(); 154} 155