| 1 | //===-- DataBufferHeap.cpp ------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "lldb/Utility/DataBufferHeap.h" |
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| 10 | |
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| 11 | |
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| 12 | using namespace lldb_private; |
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| 13 | |
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| 14 | // Default constructor |
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| 15 | DataBufferHeap::DataBufferHeap() : m_data() {} |
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| 16 | |
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| 17 | // Initialize this class with "n" characters and fill the buffer with "ch". |
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| 18 | DataBufferHeap::DataBufferHeap(lldb::offset_t n, uint8_t ch) : m_data() { |
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| 19 | if (n < m_data.max_size()) |
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| 20 | m_data.assign(n: n, val: ch); |
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| 21 | } |
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| 22 | |
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| 23 | // Initialize this class with a copy of the "n" bytes from the "bytes" buffer. |
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| 24 | DataBufferHeap::DataBufferHeap(const void *src, lldb::offset_t src_len) |
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| 25 | : m_data() { |
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| 26 | CopyData(src, src_len); |
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| 27 | } |
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| 28 | |
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| 29 | DataBufferHeap::DataBufferHeap(const DataBuffer &data_buffer) : m_data() { |
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| 30 | CopyData(src: data_buffer.GetBytes(), src_len: data_buffer.GetByteSize()); |
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| 31 | } |
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| 32 | |
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| 33 | // Virtual destructor since this class inherits from a pure virtual base class. |
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| 34 | DataBufferHeap::~DataBufferHeap() = default; |
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| 35 | |
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| 36 | // Return a const pointer to the bytes owned by this object, or nullptr if the |
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| 37 | // object contains no bytes. |
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| 38 | const uint8_t *DataBufferHeap::GetBytesImpl() const { |
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| 39 | return (m_data.empty() ? nullptr : m_data.data()); |
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| 40 | } |
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| 41 | |
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| 42 | // Return the number of bytes this object currently contains. |
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| 43 | uint64_t DataBufferHeap::GetByteSize() const { return m_data.size(); } |
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| 44 | |
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| 45 | // Sets the number of bytes that this object should be able to contain. This |
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| 46 | // can be used prior to copying data into the buffer. |
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| 47 | uint64_t DataBufferHeap::SetByteSize(uint64_t new_size) { |
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| 48 | if (new_size < m_data.max_size()) |
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| 49 | m_data.resize(new_size: new_size); |
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| 50 | return m_data.size(); |
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| 51 | } |
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| 52 | |
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| 53 | void DataBufferHeap::CopyData(const void *src, uint64_t src_len) { |
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| 54 | const uint8_t *src_u8 = static_cast<const uint8_t *>(src); |
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| 55 | if (src && src_len > 0) |
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| 56 | m_data.assign(first: src_u8, last: src_u8 + src_len); |
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| 57 | else |
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| 58 | m_data.clear(); |
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| 59 | } |
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| 60 | |
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| 61 | void DataBufferHeap::AppendData(const void *src, uint64_t src_len) { |
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| 62 | m_data.insert(position: m_data.end(), first: static_cast<const uint8_t *>(src), |
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| 63 | last: static_cast<const uint8_t *>(src) + src_len); |
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| 64 | } |
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| 65 | |
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| 66 | void DataBufferHeap::Clear() { |
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| 67 | buffer_t empty; |
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| 68 | m_data.swap(x&: empty); |
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| 69 | } |
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| 70 | |
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| 71 | char DataBuffer::ID; |
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| 72 | char WritableDataBuffer::ID; |
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| 73 | char DataBufferUnowned::ID; |
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| 74 | char DataBufferHeap::ID; |
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| 75 | |
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