1 /*
2 * Copyright (C) 2010 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 //#define LOG_NDEBUG 0
18 #define LOG_TAG "hexdump"
19 #include <utils/Log.h>
20
21 #include "hexdump.h"
22
23 #include "ADebug.h"
24 #include "AString.h"
25
26 #include <ctype.h>
27 #include <stdint.h>
28 #include <stdio.h>
29
30 namespace android {
31
appendIndent(AString * s,int32_t indent)32 static void appendIndent(AString *s, int32_t indent) {
33 static const char kWhitespace[] =
34 " "
35 " ";
36
37 CHECK_LT((size_t)indent, sizeof(kWhitespace));
38
39 s->append(kWhitespace, indent);
40 }
41
hexdump(const void * _data,size_t size,size_t indent,AString * appendTo)42 void hexdump(const void *_data, size_t size, size_t indent, AString *appendTo) {
43 const uint8_t *data = (const uint8_t *)_data;
44
45 size_t offset = 0;
46 while (offset < size) {
47 AString line;
48
49 appendIndent(&line, indent);
50
51 char tmp[32];
52 snprintf(tmp, sizeof(tmp), "%08lx: ", (unsigned long)offset);
53
54 line.append(tmp);
55
56 for (size_t i = 0; i < 16; ++i) {
57 if (i == 8) {
58 line.append(' ');
59 }
60 if (offset + i >= size) {
61 line.append(" ");
62 } else {
63 snprintf(tmp, sizeof(tmp), "%02x ", data[offset + i]);
64 line.append(tmp);
65 }
66 }
67
68 line.append(' ');
69
70 for (size_t i = 0; i < 16; ++i) {
71 if (offset + i >= size) {
72 break;
73 }
74
75 if (isprint(data[offset + i])) {
76 line.append((char)data[offset + i]);
77 } else {
78 line.append('.');
79 }
80 }
81
82 if (appendTo != NULL) {
83 appendTo->append(line);
84 appendTo->append("\n");
85 } else {
86 ALOGI("%s", line.c_str());
87 }
88
89 offset += 16;
90 }
91 }
92
93 } // namespace android
94
95