mirror of
https://github.com/facebook/rocksdb.git
synced 2024-12-02 10:15:54 +00:00
50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
|
#ifndef RAPIDJSON_STRINGBUFFER_H_
|
||
|
|
#define RAPIDJSON_STRINGBUFFER_H_
|
||
|
|
|
||
|
|
#include "rapidjson.h"
|
||
|
|
#include "internal/stack.h"
|
||
|
|
|
||
|
|
namespace rapidjson {
|
||
|
|
|
||
|
|
//! Represents an in-memory output stream.
|
||
|
|
/*!
|
||
|
|
\tparam Encoding Encoding of the stream.
|
||
|
|
\tparam Allocator type for allocating memory buffer.
|
||
|
|
\implements Stream
|
||
|
|
*/
|
||
|
|
template <typename Encoding, typename Allocator = CrtAllocator>
|
||
|
|
struct GenericStringBuffer {
|
||
|
|
typedef typename Encoding::Ch Ch;
|
||
|
|
|
||
|
|
GenericStringBuffer(Allocator* allocator = 0, size_t capacity = kDefaultCapacity) : stack_(allocator, capacity) {}
|
||
|
|
|
||
|
|
void Put(Ch c) { *stack_.template Push<Ch>() = c; }
|
||
|
|
|
||
|
|
void Clear() { stack_.Clear(); }
|
||
|
|
|
||
|
|
const char* GetString() const {
|
||
|
|
// Push and pop a null terminator. This is safe.
|
||
|
|
*stack_.template Push<Ch>() = '\0';
|
||
|
|
stack_.template Pop<Ch>(1);
|
||
|
|
|
||
|
|
return stack_.template Bottom<Ch>();
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t Size() const { return stack_.GetSize(); }
|
||
|
|
|
||
|
|
static const size_t kDefaultCapacity = 256;
|
||
|
|
mutable internal::Stack<Allocator> stack_;
|
||
|
|
};
|
||
|
|
|
||
|
|
typedef GenericStringBuffer<UTF8<> > StringBuffer;
|
||
|
|
|
||
|
|
//! Implement specialized version of PutN() with memset() for better performance.
|
||
|
|
template<>
|
||
|
|
inline void PutN(GenericStringBuffer<UTF8<> >& stream, char c, size_t n) {
|
||
|
|
memset(stream.stack_.Push<char>(n), c, n * sizeof(c));
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace rapidjson
|
||
|
|
|
||
|
|
#endif // RAPIDJSON_STRINGBUFFER_H_
|