mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-22 10:22:08 +00:00
72 lines
2.6 KiB
C
72 lines
2.6 KiB
C
|
// 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.
|
||
|
|
//
|
||
|
|
// 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 RAPIDJSON_MEMORYSTREAM_H_
|
||
|
|
#define RAPIDJSON_MEMORYSTREAM_H_
|
||
|
|
|
||
|
|
#include "stream.h"
|
||
|
|
|
||
|
|
#ifdef __clang__
|
||
|
|
RAPIDJSON_DIAG_PUSH
|
||
|
|
RAPIDJSON_DIAG_OFF(unreachable-code)
|
||
|
|
RAPIDJSON_DIAG_OFF(missing-noreturn)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
RAPIDJSON_NAMESPACE_BEGIN
|
||
|
|
|
||
|
|
//! 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 RAPIDJSON_UNLIKELY(src_ == end_) ? '\0' : *src_; }
|
||
|
|
Ch Take() { return RAPIDJSON_UNLIKELY(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.
|
||
|
|
};
|
||
|
|
|
||
|
|
RAPIDJSON_NAMESPACE_END
|
||
|
|
|
||
|
|
#ifdef __clang__
|
||
|
|
RAPIDJSON_DIAG_POP
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif // RAPIDJSON_MEMORYBUFFER_H_
|