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79 lines
1.8 KiB
79 lines
1.8 KiB
/*
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* Copyright (C) 2018 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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#include "CodeWriter.h"
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#ifdef LOG_TAG
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#undef LOG_TAG
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#endif
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#define LOG_TAG "sysprop_gen"
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#include <cstdarg>
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#include <cstdio>
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#include <vector>
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#include <android-base/logging.h>
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CodeWriter::CodeWriter(std::string indent) : indent_(std::move(indent)) {
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}
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void CodeWriter::Write(const char* format, ...) {
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va_list ap, apc;
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va_start(ap, format);
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va_copy(apc, ap);
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int size = std::vsnprintf(nullptr, 0, format, ap);
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va_end(ap);
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if (size < 0) {
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va_end(apc);
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PLOG(FATAL) << "vsnprintf failed";
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}
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std::vector<char> buf(size + 1);
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if (std::vsnprintf(buf.data(), size + 1, format, apc) < 0) {
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va_end(apc);
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PLOG(FATAL) << "vsnprintf failed";
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}
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va_end(apc);
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for (int i = 0; i < size; ++i) {
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char ch = buf[i];
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if (ch == '\n') {
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start_of_line_ = true;
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} else {
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if (start_of_line_) {
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for (int j = 0; j < indent_level_; ++j) {
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code_ += indent_;
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}
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start_of_line_ = false;
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}
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}
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code_.push_back(ch);
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}
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}
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void CodeWriter::Indent() {
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++indent_level_;
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}
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void CodeWriter::Dedent() {
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if (indent_level_ == 0) {
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LOG(FATAL) << "Dedent failed: indent level is already 0";
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}
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--indent_level_;
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}
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