2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
110 lines
3.0 KiB
C++
110 lines
3.0 KiB
C++
//===-- CommandHistory.cpp --------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include <inttypes.h>
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#include "lldb/Interpreter/CommandHistory.h"
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using namespace lldb;
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using namespace lldb_private;
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CommandHistory::CommandHistory() : m_mutex(), m_history() {}
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CommandHistory::~CommandHistory() {}
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size_t CommandHistory::GetSize() const {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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return m_history.size();
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}
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bool CommandHistory::IsEmpty() const {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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return m_history.empty();
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}
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llvm::Optional<llvm::StringRef>
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CommandHistory::FindString(llvm::StringRef input_str) const {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (input_str.size() < 2)
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return llvm::None;
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if (input_str[0] != g_repeat_char)
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return llvm::None;
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if (input_str[1] == g_repeat_char) {
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if (m_history.empty())
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return llvm::None;
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return llvm::StringRef(m_history.back());
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}
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input_str = input_str.drop_front();
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size_t idx = 0;
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if (input_str.front() == '-') {
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if (input_str.drop_front(1).getAsInteger(0, idx))
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return llvm::None;
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if (idx >= m_history.size())
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return llvm::None;
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idx = m_history.size() - idx;
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} else {
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if (input_str.getAsInteger(0, idx))
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return llvm::None;
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if (idx >= m_history.size())
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return llvm::None;
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}
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return llvm::StringRef(m_history[idx]);
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}
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llvm::StringRef CommandHistory::GetStringAtIndex(size_t idx) const {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (idx < m_history.size())
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return m_history[idx];
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return "";
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}
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llvm::StringRef CommandHistory::operator[](size_t idx) const {
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return GetStringAtIndex(idx);
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}
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llvm::StringRef CommandHistory::GetRecentmostString() const {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (m_history.empty())
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return "";
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return m_history.back();
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}
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void CommandHistory::AppendString(llvm::StringRef str, bool reject_if_dupe) {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (reject_if_dupe) {
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if (!m_history.empty()) {
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if (str == m_history.back())
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return;
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}
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}
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m_history.push_back(str);
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}
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void CommandHistory::Clear() {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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m_history.clear();
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}
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void CommandHistory::Dump(Stream &stream, size_t start_idx,
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size_t stop_idx) const {
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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stop_idx = std::min(stop_idx + 1, m_history.size());
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for (size_t counter = start_idx; counter < stop_idx; counter++) {
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const std::string hist_item = m_history[counter];
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if (!hist_item.empty()) {
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stream.Indent();
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stream.Printf("%4" PRIu64 ": %s\n", (uint64_t)counter, hist_item.c_str());
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}
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}
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}
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