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 "DumpWriter.h"
18
19 #include <android-base/stringprintf.h>
20 #include <utils/String8.h>
21
22 using android::base::StringAppendV;
23 using android::String16;
24 using android::Vector;
25
26 namespace android {
27 namespace net {
28
29 namespace {
30
31 const char kIndentString[] = " ";
32 const size_t kIndentStringLen = strlen(kIndentString);
33
34 } // namespace
35
36
DumpWriter(int fd)37 DumpWriter::DumpWriter(int fd) : mIndentLevel(0), mFd(fd) {}
38
incIndent()39 void DumpWriter::incIndent() {
40 if (mIndentLevel < 255) {
41 mIndentLevel++;
42 }
43 }
44
decIndent()45 void DumpWriter::decIndent() {
46 if (mIndentLevel > 0) {
47 mIndentLevel--;
48 }
49 }
50
println(const std::string & line)51 void DumpWriter::println(const std::string& line) {
52 if (!line.empty()) {
53 for (int i = 0; i < mIndentLevel; i++) {
54 write(mFd, kIndentString, kIndentStringLen);
55 }
56 write(mFd, line.c_str(), line.size());
57 }
58 write(mFd, "\n", 1);
59 }
60
println(const char * fmt,...)61 void DumpWriter::println(const char* fmt, ...) {
62 std::string line;
63 va_list ap;
64 va_start(ap, fmt);
65 StringAppendV(&line, fmt, ap);
66 va_end(ap);
67 println(line);
68 }
69
70 } // namespace net
71 } // namespace android
72