aboutsummaryrefslogtreecommitdiff
path: root/thirdparty/rapidjson/memorybuffer.h
diff options
context:
space:
mode:
Diffstat (limited to 'thirdparty/rapidjson/memorybuffer.h')
-rw-r--r--thirdparty/rapidjson/memorybuffer.h70
1 files changed, 70 insertions, 0 deletions
diff --git a/thirdparty/rapidjson/memorybuffer.h b/thirdparty/rapidjson/memorybuffer.h
new file mode 100644
index 00000000..39bee1de
--- /dev/null
+++ b/thirdparty/rapidjson/memorybuffer.h
@@ -0,0 +1,70 @@
+// 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 RAPIDJSON_MEMORYBUFFER_H_
+#define RAPIDJSON_MEMORYBUFFER_H_
+
+#include "stream.h"
+#include "internal/stack.h"
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+//! Represents an in-memory output byte stream.
+/*!
+ This class is mainly for being wrapped by EncodedOutputStream or AutoUTFOutputStream.
+
+ It is similar to FileWriteBuffer but the destination is an in-memory buffer instead of a file.
+
+ Differences between MemoryBuffer and StringBuffer:
+ 1. StringBuffer has Encoding but MemoryBuffer is only a byte buffer.
+ 2. StringBuffer::GetString() returns a null-terminated string. MemoryBuffer::GetBuffer() returns a buffer without terminator.
+
+ \tparam Allocator type for allocating memory buffer.
+ \note implements Stream concept
+*/
+template <typename Allocator = CrtAllocator>
+struct GenericMemoryBuffer {
+ typedef char Ch; // byte
+
+ GenericMemoryBuffer(Allocator* allocator = 0, size_t capacity = kDefaultCapacity) : stack_(allocator, capacity) {}
+
+ void Put(Ch c) { *stack_.template Push<Ch>() = c; }
+ void Flush() {}
+
+ void Clear() { stack_.Clear(); }
+ void ShrinkToFit() { stack_.ShrinkToFit(); }
+ Ch* Push(size_t count) { return stack_.template Push<Ch>(count); }
+ void Pop(size_t count) { stack_.template Pop<Ch>(count); }
+
+ const Ch* GetBuffer() const {
+ return stack_.template Bottom<Ch>();
+ }
+
+ size_t GetSize() const { return stack_.GetSize(); }
+
+ static const size_t kDefaultCapacity = 256;
+ mutable internal::Stack<Allocator> stack_;
+};
+
+typedef GenericMemoryBuffer<> MemoryBuffer;
+
+//! Implement specialized version of PutN() with memset() for better performance.
+template<>
+inline void PutN(MemoryBuffer& memoryBuffer, char c, size_t n) {
+ std::memset(memoryBuffer.stack_.Push<char>(n), c, n * sizeof(c));
+}
+
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_MEMORYBUFFER_H_