blame: source/code/Libs/include/cereal/external/rapidjson/internal/strfunc.h

// Tencent is pleased to support the open source community by making RapidJSON available.

// 

// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.

//

// Licensed under the MIT License (the "License"); you may not use this file except

// in compliance with the License. You may obtain a copy of the License at

//

// http://opensource.org/licenses/MIT

//

// 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 CEREAL_RAPIDJSON_INTERNAL_STRFUNC_H_

#define CEREAL_RAPIDJSON_INTERNAL_STRFUNC_H_

#include "../stream.h"

CEREAL_RAPIDJSON_NAMESPACE_BEGIN

namespace internal {

//! Custom strlen() which works on different character types.

/*! \tparam Ch Character type (e.g. char, wchar_t, short)

    \param s Null-terminated input string.

    \return Number of characters in the string. 

    \note This has the same semantics as strlen(), the return value is not number of Unicode codepoints.

*/

template <typename Ch>

inline SizeType StrLen(const Ch* s) {

    const Ch* p = s;

    while (*p) ++p;

    return SizeType(p - s);

}

//! Returns number of code points in a encoded string.

template<typename Encoding>

bool CountStringCodePoint(const typename Encoding::Ch* s, SizeType length, SizeType* outCount) {

    GenericStringStream<Encoding> is(s);

    const typename Encoding::Ch* end = s + length;

    SizeType count = 0;

    while (is.src_ < end) {

        unsigned codepoint;

        if (!Encoding::Decode(is, &codepoint))

            return false;

        count++;

    }

    *outCount = count;

    return true;

}

} // namespace internal

CEREAL_RAPIDJSON_NAMESPACE_END

#endif // CEREAL_RAPIDJSON_INTERNAL_STRFUNC_H_