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//===-- DataBufferHeap.cpp ------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lldb/Utility/DataBufferHeap.h"
using namespace lldb_private;
// Default constructor
DataBufferHeap::DataBufferHeap() : m_data() {}
// Initialize this class with "n" characters and fill the buffer with "ch".
DataBufferHeap::DataBufferHeap(lldb::offset_t n, uint8_t ch) : m_data() {
if (n < m_data.max_size())
m_data.assign(n, ch);
}
// Initialize this class with a copy of the "n" bytes from the "bytes" buffer.
DataBufferHeap::DataBufferHeap(const void *src, lldb::offset_t src_len)
: m_data() {
CopyData(src, src_len);
}
DataBufferHeap::DataBufferHeap(const DataBuffer &data_buffer) : m_data() {
CopyData(data_buffer.GetBytes(), data_buffer.GetByteSize());
}
// Virtual destructor since this class inherits from a pure virtual base class.
DataBufferHeap::~DataBufferHeap() = default;
// Return a const pointer to the bytes owned by this object, or nullptr if the
// object contains no bytes.
const uint8_t *DataBufferHeap::GetBytesImpl() const {
return (m_data.empty() ? nullptr : m_data.data());
}
// Return the number of bytes this object currently contains.
uint64_t DataBufferHeap::GetByteSize() const { return m_data.size(); }
// Sets the number of bytes that this object should be able to contain. This
// can be used prior to copying data into the buffer.
uint64_t DataBufferHeap::SetByteSize(uint64_t new_size) {
if (new_size < m_data.max_size())
m_data.resize(new_size);
return m_data.size();
}
void DataBufferHeap::CopyData(const void *src, uint64_t src_len) {
const uint8_t *src_u8 = static_cast<const uint8_t *>(src);
if (src && src_len > 0)
m_data.assign(src_u8, src_u8 + src_len);
else
m_data.clear();
}
void DataBufferHeap::AppendData(const void *src, uint64_t src_len) {
m_data.insert(m_data.end(), static_cast<const uint8_t *>(src),
static_cast<const uint8_t *>(src) + src_len);
}
void DataBufferHeap::Clear() {
buffer_t empty;
m_data.swap(empty);
}
char DataBuffer::ID;
char WritableDataBuffer::ID;
char DataBufferUnowned::ID;
char DataBufferHeap::ID;
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