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51 lines
1.7 KiB
51 lines
1.7 KiB
// Copyright (C) 2011 The Libphonenumber 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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// 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 I18N_PHONENUMBERS_ENCODING_UTILS_H_
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#define I18N_PHONENUMBERS_ENCODING_UTILS_H_
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#include "phonenumbers/base/basictypes.h"
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#include "phonenumbers/utf/unilib.h"
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#include "phonenumbers/utf/utf.h"
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namespace i18n {
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namespace phonenumbers {
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class EncodingUtils {
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public:
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// Decodes one Unicode code-point value from a UTF-8 array. Returns the number
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// of bytes read from the array. If the array does not contain valid UTF-8,
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// the function stores 0xFFFD in the output variable and returns 1.
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static inline int DecodeUTF8Char(const char* in, char32* out) {
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Rune r;
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int len = chartorune(&r, in);
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*out = r;
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return len;
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}
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static const char* AdvanceOneUTF8Character(const char* buf_utf8) {
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return buf_utf8 + UniLib::OneCharLen(buf_utf8);
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}
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static const char* BackUpOneUTF8Character(const char* start,
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const char* end) {
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while (start < end && UniLib::IsTrailByte(*--end)) {}
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return end;
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}
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};
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} // namespace phonenumbers
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} // namespace i18n
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#endif // I18N_PHONENUMBERS_ENCODING_UTILS_H_
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