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69 lines
2.0 KiB
69 lines
2.0 KiB
7 months ago
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/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef NETDUTILS_DUMPWRITER_H_
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#define NETDUTILS_DUMPWRITER_H_
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#include <string>
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namespace android {
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namespace netdutils {
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class DumpWriter {
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public:
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DumpWriter(int fd);
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void incIndent();
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void decIndent();
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void println(const std::string& line);
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template <size_t n>
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void println(const char line[n]) {
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println(std::string(line));
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}
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// Hint to the compiler that it should apply printf validation of
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// arguments (beginning at position 3) of the format (specified in
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// position 2). Note that position 1 is the implicit "this" argument.
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void println(const char* fmt, ...) __attribute__((__format__(__printf__, 2, 3)));
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void blankline() { println(""); }
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private:
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uint8_t mIndentLevel;
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int mFd;
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};
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class ScopedIndent {
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public:
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ScopedIndent() = delete;
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ScopedIndent(const ScopedIndent&) = delete;
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ScopedIndent(ScopedIndent&&) = delete;
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explicit ScopedIndent(DumpWriter& dw) : mDw(dw) { mDw.incIndent(); }
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~ScopedIndent() { mDw.decIndent(); }
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ScopedIndent& operator=(const ScopedIndent&) = delete;
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ScopedIndent& operator=(ScopedIndent&&) = delete;
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// TODO: consider additional {inc,dec}Indent methods and a counter that
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// can be used to unwind all pending increments on exit.
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private:
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DumpWriter& mDw;
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};
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} // namespace netdutils
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} // namespace android
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#endif // NETDUTILS_DUMPWRITER_H_
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