1//===-- StreamBuffer.h ------------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLDB_CORE_STREAMBUFFER_H
10#define LLDB_CORE_STREAMBUFFER_H
11
12#include "lldb/Utility/Stream.h"
13#include "llvm/ADT/SmallVector.h"
14#include <cstdio>
15#include <string>
16
17namespace lldb_private {
18
19template <unsigned N> class StreamBuffer : public Stream {
20public:
21  StreamBuffer() : Stream(0, 4, lldb::eByteOrderBig), m_packet() {}
22
23  StreamBuffer(uint32_t flags, uint32_t addr_size, lldb::ByteOrder byte_order)
24      : Stream(flags, addr_size, byte_order), m_packet() {}
25
26  ~StreamBuffer() override = default;
27
28  void Flush() override {
29    // Nothing to do when flushing a buffer based stream...
30  }
31
32  void Clear() { m_packet.clear(); }
33
34  // Beware, this might not be NULL terminated as you can expect from
35  // StringString as there may be random bits in the llvm::SmallVector. If you
36  // are using this class to create a C string, be sure the call PutChar ('\0')
37  // after you have created your string, or use StreamString.
38  const char *GetData() const { return m_packet.data(); }
39
40  size_t GetSize() const { return m_packet.size(); }
41
42protected:
43  llvm::SmallVector<char, N> m_packet;
44
45  size_t WriteImpl(const void *s, size_t length) override {
46    if (s && length)
47      m_packet.append((const char *)s, ((const char *)s) + length);
48    return length;
49  }
50};
51
52} // namespace lldb_private
53
54#endif // LLDB_CORE_STREAMBUFFER_H
55