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// Copyright (C) 2011 The Libphonenumber Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef I18N_PHONENUMBERS_ENCODING_UTILS_H_
#define I18N_PHONENUMBERS_ENCODING_UTILS_H_
#include "phonenumbers/base/basictypes.h"
#include "phonenumbers/utf/unilib.h"
#include "phonenumbers/utf/utf.h"
namespace i18n {
namespace phonenumbers {
class EncodingUtils {
public:
// Decodes one Unicode code-point value from a UTF-8 array. Returns the number
// of bytes read from the array. If the array does not contain valid UTF-8,
// the function stores 0xFFFD in the output variable and returns 1.
static inline int DecodeUTF8Char(const char* in, char32* out) {
Rune r;
int len = chartorune(&r, in);
*out = r;
return len;
}
static const char* AdvanceOneUTF8Character(const char* buf_utf8) {
return buf_utf8 + UniLib::OneCharLen(buf_utf8);
}
static const char* BackUpOneUTF8Character(const char* start,
const char* end) {
while (start < end && UniLib::IsTrailByte(*--end)) {}
return end;
}
};
} // namespace phonenumbers
} // namespace i18n
#endif // I18N_PHONENUMBERS_ENCODING_UTILS_H_
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