forked from OSchip/llvm-project
112 lines
3.0 KiB
C++
112 lines
3.0 KiB
C++
//===-- CommandHistory.cpp --------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include <inttypes.h>
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#include "lldb/Host/StringConvert.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(2).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.drop_front().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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