57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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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 <folly/logging/LogStream.h>
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namespace folly {
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LogStreamBuffer::int_type LogStreamBuffer::overflow(int_type ch) {
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auto currentSize = str_.size();
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size_t newSize;
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if (currentSize == 0) {
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newSize = kInitialCapacity;
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} else {
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// Increase by 1.25 each time
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newSize = currentSize + (currentSize >> 2);
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}
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try {
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str_.resize(newSize);
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if (ch == EOF) {
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setp((&str_.front()) + currentSize, (&str_.front()) + newSize);
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return 'x';
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} else {
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str_[currentSize] = static_cast<char>(ch);
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setp((&str_.front()) + currentSize + 1, (&str_.front()) + newSize);
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return ch;
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}
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} catch (const std::exception&) {
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// Return EOF to indicate that the operation failed.
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// In general the only exception we really expect to see here is
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// std::bad_alloc() from the str_.resize() call.
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return EOF;
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}
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}
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LogStream::LogStream(LogStreamProcessor* processor)
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: std::ostream(nullptr), processor_{processor} {
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rdbuf(&buffer_);
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}
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LogStream::~LogStream() = default;
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} // namespace folly
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