blob: 226439a767364577b3e8168104fb0d1575e4638a [file] [log] [blame]
// 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
// 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.
#include "../stream.h"
#include <cwchar>
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);
template <>
inline SizeType StrLen(const char* s) {
return SizeType(std::strlen(s));
template <>
inline SizeType StrLen(const wchar_t* s) {
return SizeType(std::wcslen(s));
//! Returns number of code points in a encoded string.
template<typename Encoding>
bool CountStringCodePoint(const typename Encoding::Ch* s, SizeType length, SizeType* outCount) {
RAPIDJSON_ASSERT(outCount != 0);
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;
*outCount = count;
return true;
} // namespace internal