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extern/rapidjson/include/rapidjson/memorystream.h
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| // Copyright (C) 2011 Milo Yip | |||||
| // | |||||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | |||||
| // of this software and associated documentation files (the "Software"), to deal | |||||
| // in the Software without restriction, including without limitation the rights | |||||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |||||
| // copies of the Software, and to permit persons to whom the Software is | |||||
| // furnished to do so, subject to the following conditions: | |||||
| // | |||||
| // The above copyright notice and this permission notice shall be included in | |||||
| // all copies or substantial portions of the Software. | |||||
| // | |||||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |||||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |||||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |||||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |||||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |||||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |||||
| // THE SOFTWARE. | |||||
| #ifndef RAPIDJSON_MEMORYSTREAM_H_ | |||||
| #define RAPIDJSON_MEMORYSTREAM_H_ | |||||
| #include "rapidjson.h" | |||||
| namespace rapidjson { | |||||
| //! Represents an in-memory input byte stream. | |||||
| /*! | |||||
| This class is mainly for being wrapped by EncodedInputStream or AutoUTFInputStream. | |||||
| It is similar to FileReadBuffer but the source is an in-memory buffer instead of a file. | |||||
| Differences between MemoryStream and StringStream: | |||||
| 1. StringStream has encoding but MemoryStream is a byte stream. | |||||
| 2. MemoryStream needs size of the source buffer and the buffer don't need to be null terminated. StringStream assume null-terminated string as source. | |||||
| 3. MemoryStream supports Peek4() for encoding detection. StringStream is specified with an encoding so it should not have Peek4(). | |||||
| \note implements Stream concept | |||||
| */ | |||||
| struct MemoryStream { | |||||
| typedef char Ch; // byte | |||||
| MemoryStream(const Ch *src, size_t size) : src_(src), begin_(src), end_(src + size), size_(size) {} | |||||
| Ch Peek() const { return *src_; } | |||||
| Ch Take() { return (src_ == end_) ? '\0' : *src_++; } | |||||
| size_t Tell() const { return static_cast<size_t>(src_ - begin_); } | |||||
| Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; } | |||||
| void Put(Ch) { RAPIDJSON_ASSERT(false); } | |||||
| void Flush() { RAPIDJSON_ASSERT(false); } | |||||
| size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; } | |||||
| // For encoding detection only. | |||||
| const Ch* Peek4() const { | |||||
| return Tell() + 4 <= size_ ? src_ : 0; | |||||
| } | |||||
| const Ch* src_; //!< Current read position. | |||||
| const Ch* begin_; //!< Original head of the string. | |||||
| const Ch* end_; //!< End of stream. | |||||
| size_t size_; //!< Size of the stream. | |||||
| }; | |||||
| } // namespace rapidjson | |||||
| #endif // RAPIDJSON_MEMORYBUFFER_H_ | |||||