1 /*
2 * Copyright (C) 2017 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 "chre/util/nanoapp/debug.h"
18
19 #include <cctype>
20 #include <cstdio>
21
22 #ifdef CHRE_NANOAPP_INTERNAL
23 #include "chre/platform/log.h"
24 #else
25 #define LOG_TAG "[DEBUG]"
26 #include "chre/util/nanoapp/log.h"
27 #endif
28
29 namespace chre {
30
logBuffer(const uint8_t * buffer,size_t bufferSize)31 void logBuffer(const uint8_t *buffer, size_t bufferSize) {
32 char line[32];
33 char lineChars[32];
34 size_t offset = 0;
35 size_t offsetChars = 0;
36
37 if (bufferSize > 128) {
38 LOGD("Dumping first 128 bytes of buffer @ %p, size %zu",
39 buffer, bufferSize);
40 bufferSize = 128;
41 } else {
42 LOGD("Dumping buffer @ %p, size %zu", buffer, bufferSize);
43 }
44
45 for (size_t i = 1; i <= bufferSize; i++) {
46 // This ignores potential errors returned by snprintf. This is a relatively
47 // simple case and the deliberate decision to ignore them has been made.
48 offset += static_cast<size_t>(
49 snprintf(&line[offset], sizeof(line) - offset, "%02x ", buffer[i - 1]));
50 offsetChars += static_cast<size_t>(
51 snprintf(&lineChars[offsetChars], sizeof(lineChars) - offsetChars,
52 "%c", (isprint(buffer[i - 1])) ? buffer[i - 1] : '.'));
53 if ((i % 8) == 0) {
54 LOGD(" %s\t%s", line, lineChars);
55 offset = 0;
56 offsetChars = 0;
57 } else if ((i % 4) == 0) {
58 offset += static_cast<size_t>(
59 snprintf(&line[offset], sizeof(line) - offset, " "));
60 }
61 }
62
63 if (offset > 0) {
64 char tabs[8];
65 char *pos = tabs;
66 while (offset < 28) {
67 *pos++ = '\t';
68 offset += 8;
69 }
70 *pos = '\0';
71 LOGD(" %s%s%s", line, tabs, lineChars);
72 }
73 }
74
75 } // namespace chre
76