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//===-- CommandHistory.cpp --------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <inttypes.h>
#include "lldb/Host/StringConvert.h"
#include "lldb/Interpreter/CommandHistory.h"
using namespace lldb;
using namespace lldb_private;
CommandHistory::CommandHistory() : m_mutex(), m_history() {}
CommandHistory::~CommandHistory() {}
size_t CommandHistory::GetSize() const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
return m_history.size();
}
bool CommandHistory::IsEmpty() const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
return m_history.empty();
}
const char *CommandHistory::FindString(const char *input_str) const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (!input_str)
return nullptr;
if (input_str[0] != g_repeat_char)
return nullptr;
if (input_str[1] == '-') {
bool success;
size_t idx = StringConvert::ToUInt32(input_str + 2, 0, 0, &success);
if (!success)
return nullptr;
if (idx > m_history.size())
return nullptr;
idx = m_history.size() - idx;
return m_history[idx].c_str();
} else if (input_str[1] == g_repeat_char) {
if (m_history.empty())
return nullptr;
else
return m_history.back().c_str();
} else {
bool success;
uint32_t idx = StringConvert::ToUInt32(input_str + 1, 0, 0, &success);
if (!success)
return nullptr;
if (idx >= m_history.size())
return nullptr;
return m_history[idx].c_str();
}
}
const char *CommandHistory::GetStringAtIndex(size_t idx) const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (idx < m_history.size())
return m_history[idx].c_str();
return nullptr;
}
const char *CommandHistory::operator[](size_t idx) const {
return GetStringAtIndex(idx);
}
const char *CommandHistory::GetRecentmostString() const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (m_history.empty())
return nullptr;
return m_history.back().c_str();
}
void CommandHistory::AppendString(const std::string &str, bool reject_if_dupe) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (reject_if_dupe) {
if (!m_history.empty()) {
if (str == m_history.back())
return;
}
}
m_history.push_back(std::string(str));
}
void CommandHistory::Clear() {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
m_history.clear();
}
void CommandHistory::Dump(Stream &stream, size_t start_idx,
size_t stop_idx) const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
stop_idx = std::min(stop_idx + 1, m_history.size());
for (size_t counter = start_idx; counter < stop_idx; counter++) {
const std::string hist_item = m_history[counter];
if (!hist_item.empty()) {
stream.Indent();
stream.Printf("%4" PRIu64 ": %s\n", (uint64_t)counter, hist_item.c_str());
}
}
}
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