forked from OSchip/llvm-project
143 lines
3.4 KiB
C++
143 lines
3.4 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/Interpreter/CommandHistory.h"
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#include "lldb/Host/StringConvert.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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{}
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CommandHistory::~CommandHistory ()
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{}
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size_t
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CommandHistory::GetSize () const
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{
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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
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CommandHistory::IsEmpty () const
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{
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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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const char*
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CommandHistory::FindString (const char* input_str) const
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{
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std::lock_guard<std::recursive_mutex> guard(m_mutex);
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if (!input_str)
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return nullptr;
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if (input_str[0] != g_repeat_char)
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return nullptr;
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if (input_str[1] == '-')
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{
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bool success;
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size_t idx = StringConvert::ToUInt32 (input_str+2, 0, 0, &success);
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if (!success)
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return nullptr;
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if (idx > m_history.size())
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return nullptr;
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idx = m_history.size() - idx;
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return m_history[idx].c_str();
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}
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else if (input_str[1] == g_repeat_char)
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{
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if (m_history.empty())
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return nullptr;
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else
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return m_history.back().c_str();
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}
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else
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{
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bool success;
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uint32_t idx = StringConvert::ToUInt32 (input_str+1, 0, 0, &success);
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if (!success)
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return nullptr;
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if (idx >= m_history.size())
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return nullptr;
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return m_history[idx].c_str();
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}
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}
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const char*
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CommandHistory::GetStringAtIndex (size_t idx) const
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{
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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].c_str();
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return nullptr;
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}
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const char*
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CommandHistory::operator [] (size_t idx) const
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{
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return GetStringAtIndex(idx);
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}
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const char*
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CommandHistory::GetRecentmostString () const
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{
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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 nullptr;
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return m_history.back().c_str();
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}
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void
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CommandHistory::AppendString (const std::string& str,
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bool reject_if_dupe)
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{
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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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{
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if (!m_history.empty())
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{
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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(std::string(str));
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}
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void
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CommandHistory::Clear ()
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{
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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
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CommandHistory::Dump (Stream& stream,
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size_t start_idx,
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size_t stop_idx) const
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{
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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;
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counter < stop_idx;
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counter++)
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{
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const std::string hist_item = m_history[counter];
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if (!hist_item.empty())
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{
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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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