107 lines · cpp
1//===-- CommandHistory.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-exception6//7//===----------------------------------------------------------------------===//8 9#include <cinttypes>10#include <optional>11 12#include "lldb/Interpreter/CommandHistory.h"13 14using namespace lldb;15using namespace lldb_private;16 17size_t CommandHistory::GetSize() const {18 std::lock_guard<std::recursive_mutex> guard(m_mutex);19 return m_history.size();20}21 22bool CommandHistory::IsEmpty() const {23 std::lock_guard<std::recursive_mutex> guard(m_mutex);24 return m_history.empty();25}26 27std::optional<llvm::StringRef>28CommandHistory::FindString(llvm::StringRef input_str) const {29 std::lock_guard<std::recursive_mutex> guard(m_mutex);30 if (input_str.size() < 2)31 return std::nullopt;32 33 if (input_str[0] != g_repeat_char)34 return std::nullopt;35 36 if (input_str[1] == g_repeat_char) {37 if (m_history.empty())38 return std::nullopt;39 return llvm::StringRef(m_history.back());40 }41 42 input_str = input_str.drop_front();43 44 size_t idx = 0;45 if (input_str.front() == '-') {46 if (input_str.drop_front(1).getAsInteger(0, idx))47 return std::nullopt;48 if (idx >= m_history.size())49 return std::nullopt;50 idx = m_history.size() - idx;51 } else {52 if (input_str.getAsInteger(0, idx))53 return std::nullopt;54 if (idx >= m_history.size())55 return std::nullopt;56 }57 58 return llvm::StringRef(m_history[idx]);59}60 61llvm::StringRef CommandHistory::GetStringAtIndex(size_t idx) const {62 std::lock_guard<std::recursive_mutex> guard(m_mutex);63 if (idx < m_history.size())64 return m_history[idx];65 return "";66}67 68llvm::StringRef CommandHistory::operator[](size_t idx) const {69 return GetStringAtIndex(idx);70}71 72llvm::StringRef CommandHistory::GetRecentmostString() const {73 std::lock_guard<std::recursive_mutex> guard(m_mutex);74 if (m_history.empty())75 return "";76 return m_history.back();77}78 79void CommandHistory::AppendString(llvm::StringRef str, bool reject_if_dupe) {80 std::lock_guard<std::recursive_mutex> guard(m_mutex);81 if (reject_if_dupe) {82 if (!m_history.empty()) {83 if (str == m_history.back())84 return;85 }86 }87 m_history.push_back(std::string(str));88}89 90void CommandHistory::Clear() {91 std::lock_guard<std::recursive_mutex> guard(m_mutex);92 m_history.clear();93}94 95void CommandHistory::Dump(Stream &stream, size_t start_idx,96 size_t stop_idx) const {97 std::lock_guard<std::recursive_mutex> guard(m_mutex);98 stop_idx = std::min(stop_idx + 1, m_history.size());99 for (size_t counter = start_idx; counter < stop_idx; counter++) {100 const std::string hist_item = m_history[counter];101 if (!hist_item.empty()) {102 stream.Indent();103 stream.Printf("%4" PRIu64 ": %s\n", (uint64_t)counter, hist_item.c_str());104 }105 }106}107