feat(agv_pro_bringup): add multi-lidar support and drivers
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// Tencent is pleased to support the open source community by making RapidJSON
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// available.
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//
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// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All
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// rights reserved.
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//
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// Licensed under the MIT License (the "License"); you may not use this file
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// except in compliance with the License. You may obtain a copy of the License
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// at
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//
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// http://opensource.org/licenses/MIT
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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, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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#ifndef RAPIDJSON_MEMORYSTREAM_H_
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#define RAPIDJSON_MEMORYSTREAM_H_
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#include "stream.h"
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#ifdef __clang__
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RAPIDJSON_DIAG_PUSH
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RAPIDJSON_DIAG_OFF(unreachable - code)
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RAPIDJSON_DIAG_OFF(missing - noreturn)
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#endif
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RAPIDJSON_NAMESPACE_BEGIN
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//! Represents an in-memory input byte stream.
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/*!
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This class is mainly for being wrapped by EncodedInputStream or
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AutoUTFInputStream.
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It is similar to FileReadBuffer but the source is an in-memory buffer
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instead of a file.
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Differences between MemoryStream and StringStream:
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1. StringStream has encoding but MemoryStream is a byte stream.
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2. MemoryStream needs size of the source buffer and the buffer don't need to
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be null terminated. StringStream assume null-terminated string as source.
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3. MemoryStream supports Peek4() for encoding detection. StringStream is
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specified with an encoding so it should not have Peek4(). \note implements
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Stream concept
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*/
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struct MemoryStream {
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typedef char Ch; // byte
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MemoryStream(const Ch *src, size_t size)
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: src_(src), begin_(src), end_(src + size), size_(size) {}
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Ch Peek() const { return RAPIDJSON_UNLIKELY(src_ == end_) ? '\0' : *src_; }
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Ch Take() { return RAPIDJSON_UNLIKELY(src_ == end_) ? '\0' : *src_++; }
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size_t Tell() const { return static_cast<size_t>(src_ - begin_); }
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Ch *PutBegin() {
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RAPIDJSON_ASSERT(false);
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return 0;
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}
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void Put(Ch) { RAPIDJSON_ASSERT(false); }
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void Flush() { RAPIDJSON_ASSERT(false); }
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size_t PutEnd(Ch *) {
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RAPIDJSON_ASSERT(false);
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return 0;
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}
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// For encoding detection only.
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const Ch *Peek4() const { return Tell() + 4 <= size_ ? src_ : 0; }
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const Ch *src_; //!< Current read position.
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const Ch *begin_; //!< Original head of the string.
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const Ch *end_; //!< End of stream.
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size_t size_; //!< Size of the stream.
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};
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RAPIDJSON_NAMESPACE_END
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#ifdef __clang__
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RAPIDJSON_DIAG_POP
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#endif
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#endif // RAPIDJSON_MEMORYBUFFER_H_
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