32 lines
1.0 KiB
C++
32 lines
1.0 KiB
C++
// Copyright 2024 KVCache.AI
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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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#ifndef CHAR_UTIL_H
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#define CHAR_UTIL_H
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#include <cctype>
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namespace mooncake {
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// Lowercase a single byte safely. Passing a (possibly signed) char straight
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// to std::tolower is UB when the byte is > 0x7F; the argument must be
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// representable as unsigned char or equal EOF.
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static inline char to_lower(char c) {
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return static_cast<char>(std::tolower(static_cast<unsigned char>(c)));
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}
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} // namespace mooncake
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#endif // CHAR_UTIL_H
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