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DataBufferHeap.cpp
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1//===-- DataBufferHeap.cpp ------------------------------------------------===//
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
10
11
12using namespace lldb_private;
13
14// Default constructor
16
17// Initialize this class with "n" characters and fill the buffer with "ch".
19 if (n < m_data.max_size())
20 m_data.assign(n, ch);
21}
22
23// Initialize this class with a copy of the "n" bytes from the "bytes" buffer.
25 : m_data() {
26 CopyData(src, src_len);
27}
28
29DataBufferHeap::DataBufferHeap(const DataBuffer &data_buffer) : m_data() {
30 CopyData(data_buffer.GetBytes(), data_buffer.GetByteSize());
31}
32
33// Virtual destructor since this class inherits from a pure virtual base class.
35
36// Return a const pointer to the bytes owned by this object, or nullptr if the
37// object contains no bytes.
38const uint8_t *DataBufferHeap::GetBytesImpl() const {
39 return (m_data.empty() ? nullptr : m_data.data());
40}
41
42// Return the number of bytes this object currently contains.
43uint64_t DataBufferHeap::GetByteSize() const { return m_data.size(); }
44
45// Sets the number of bytes that this object should be able to contain. This
46// can be used prior to copying data into the buffer.
47uint64_t DataBufferHeap::SetByteSize(uint64_t new_size) {
48 if (new_size < m_data.max_size())
49 m_data.resize(new_size);
50 return m_data.size();
51}
52
53void DataBufferHeap::CopyData(const void *src, uint64_t src_len) {
54 const uint8_t *src_u8 = static_cast<const uint8_t *>(src);
55 if (src && src_len > 0)
56 m_data.assign(src_u8, src_u8 + src_len);
57 else
58 m_data.clear();
59}
60
61void DataBufferHeap::AppendData(const void *src, uint64_t src_len) {
62 m_data.insert(m_data.end(), static_cast<const uint8_t *>(src),
63 static_cast<const uint8_t *>(src) + src_len);
64}
65
67 buffer_t empty;
68 m_data.swap(empty);
69}
70
lldb::offset_t GetByteSize() const override
Get the number of bytes in the data buffer.
lldb::offset_t SetByteSize(lldb::offset_t byte_size)
Set the number of bytes in the data buffer.
DataBufferHeap()
Default constructor.
void AppendData(const void *src, uint64_t src_len)
void CopyData(const void *src, lldb::offset_t src_len)
Makes a copy of the src_len bytes in src.
buffer_t m_data
The heap based buffer where data is stored.
static char ID
LLVM RTTI support.
~DataBufferHeap() override
Destructor.
std::vector< uint8_t > buffer_t
}
const uint8_t * GetBytesImpl() const override
Get a const pointer to the data.
static char ID
LLVM RTTI support.
Definition: DataBuffer.h:136
A pure virtual protocol class for abstracted read only data buffers.
Definition: DataBuffer.h:42
const uint8_t * GetBytes() const
Get a const pointer to the data.
Definition: DataBuffer.h:57
virtual lldb::offset_t GetByteSize() const =0
Get the number of bytes in the data buffer.
static char ID
LLVM RTTI support.
Definition: DataBuffer.h:65
static char ID
LLVM RTTI support.
Definition: DataBuffer.h:116
A class that represents a running process on the host machine.
uint64_t offset_t
Definition: lldb-types.h:85