1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdlib.h>
18#include <time.h>
19
20#include "libfdt.h"
21#include "libufdt_sysdeps.h"
22
23#include "util.h"
24
25int apply_overlay_files(const char *out_filename, const char *base_filename,
26                        const char *overlay_filename) {
27  int ret = 1;
28  char *base_buf = NULL;
29  char *overlay_buf = NULL;
30  char *merged_buf = NULL;
31
32  size_t base_len;
33  base_buf = load_file(base_filename, &base_len);
34  if (!base_buf) {
35    fprintf(stderr, "Can not load base file: %s\n", base_filename);
36    goto end;
37  }
38
39  size_t overlay_len;
40  overlay_buf = load_file(overlay_filename, &overlay_len);
41  if (!overlay_buf) {
42    fprintf(stderr, "Can not load overlay file: %s\n", overlay_filename);
43    goto end;
44  }
45
46  size_t merged_buf_len = base_len + overlay_len;
47  merged_buf = dto_malloc(merged_buf_len);
48  fdt_open_into(base_buf, merged_buf, merged_buf_len);
49
50  clock_t start = clock();
51  fdt_overlay_apply(merged_buf, overlay_buf);
52  clock_t end = clock();
53
54  if (write_fdt_to_file(out_filename, merged_buf) != 0) {
55    fprintf(stderr, "Write file error: %s\n", out_filename);
56    goto end;
57  }
58
59  // Outputs the used time.
60  double cpu_time_used = ((double)(end - start)) / CLOCKS_PER_SEC;
61  printf(" fdt_apply_overlay: took %.9f secs\n", cpu_time_used);
62  ret = 0;
63
64end:
65  if (merged_buf) dto_free(merged_buf);
66  if (overlay_buf) dto_free(overlay_buf);
67  if (base_buf) dto_free(base_buf);
68
69  return ret;
70}
71
72int main(int argc, char **argv) {
73  if (argc < 4) {
74    fprintf(stderr, "Usage: %s <base_file> <overlay_file> <out_file>\n", argv[0]);
75    return 1;
76  }
77
78  const char *base_file = argv[1];
79  const char *overlay_file = argv[2];
80  const char *out_file = argv[3];
81  int ret = apply_overlay_files(out_file, base_file, overlay_file);
82
83  return ret;
84}
85