48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
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// 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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// Likewise, but `n` copies of `c`.
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inline size_t AppendTruncated(char c, size_t n, absl::Span<char> &dst) {
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if (n > dst.size()) n = dst.size();
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memset(dst.data(), c, n);
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dst.remove_prefix(n);
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return n;
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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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