Abseil Common Libraries (C++) (grcp 依赖)
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40 lines
1.4 KiB
40 lines
1.4 KiB
// Copyright 2022 The Abseil Authors |
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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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// https://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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#ifndef ABSL_LOG_INTERNAL_APPEND_TRUNCATED_H_ |
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#define ABSL_LOG_INTERNAL_APPEND_TRUNCATED_H_ |
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#include <cstddef> |
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#include <cstring> |
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#include "absl/base/config.h" |
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#include "absl/strings/string_view.h" |
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#include "absl/types/span.h" |
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namespace absl { |
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ABSL_NAMESPACE_BEGIN |
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namespace log_internal { |
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// Copies into `dst` as many bytes of `src` as will fit, then truncates the |
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// copied bytes from the front of `dst` and returns the number of bytes written. |
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inline size_t AppendTruncated(absl::string_view src, absl::Span<char> &dst) { |
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if (src.size() > dst.size()) src = src.substr(0, dst.size()); |
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memcpy(dst.data(), src.data(), src.size()); |
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dst.remove_prefix(src.size()); |
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return src.size(); |
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} |
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} // namespace log_internal |
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ABSL_NAMESPACE_END |
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} // namespace absl |
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#endif // ABSL_LOG_INTERNAL_APPEND_TRUNCATED_H_
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