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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/Interpreter/CommandHistory.h"
#include "lldb/Host/StringConvert.h"
using namespace lldb;
using namespace lldb_private;
CommandHistory::CommandHistory () :
m_mutex(Mutex::eMutexTypeRecursive),
m_history()
{}
CommandHistory::~CommandHistory ()
{}
size_t
CommandHistory::GetSize () const
{
Mutex::Locker locker(m_mutex);
return m_history.size();
}
bool
CommandHistory::IsEmpty () const
{
Mutex::Locker locker(m_mutex);
return m_history.empty();
}
const char*
CommandHistory::FindString (const char* input_str) const
{
Mutex::Locker locker(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
{
Mutex::Locker locker(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
{
Mutex::Locker locker(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)
{
Mutex::Locker locker(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 ()
{
Mutex::Locker locker(m_mutex);
m_history.clear();
}
void
CommandHistory::Dump (Stream& stream,
size_t start_idx,
size_t stop_idx) const
{
Mutex::Locker locker(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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