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//===-- CommandObjectRegexCommand.cpp ---------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Interpreter/CommandObjectRegexCommand.h"
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"
using namespace lldb;
using namespace lldb_private;
//----------------------------------------------------------------------
// CommandObjectRegexCommand constructor
//----------------------------------------------------------------------
CommandObjectRegexCommand::CommandObjectRegexCommand
(
CommandInterpreter &interpreter,
const char *name,
const char *help,
const char *syntax,
uint32_t max_matches,
uint32_t completion_type_mask,
bool is_removable
) :
CommandObjectRaw (interpreter, name, help, syntax),
m_max_matches (max_matches),
m_completion_type_mask (completion_type_mask),
m_entries (),
m_is_removable (is_removable)
{
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
CommandObjectRegexCommand::~CommandObjectRegexCommand()
{
}
bool
CommandObjectRegexCommand::DoExecute
(
const char *command,
CommandReturnObject &result
)
{
if (command)
{
EntryCollection::const_iterator pos, end = m_entries.end();
for (pos = m_entries.begin(); pos != end; ++pos)
{
RegularExpression::Match regex_match(m_max_matches);
if (pos->regex.Execute (command, ®ex_match))
{
std::string new_command(pos->command);
std::string match_str;
char percent_var[8];
size_t idx, percent_var_idx;
for (uint32_t match_idx=1; match_idx <= m_max_matches; ++match_idx)
{
if (regex_match.GetMatchAtIndex (command, match_idx, match_str))
{
const int percent_var_len = ::snprintf (percent_var, sizeof(percent_var), "%%%u", match_idx);
for (idx = 0; (percent_var_idx = new_command.find(percent_var, idx)) != std::string::npos; )
{
new_command.erase(percent_var_idx, percent_var_len);
new_command.insert(percent_var_idx, match_str);
idx += percent_var_idx + match_str.size();
}
}
}
// Interpret the new command and return this as the result!
if (m_interpreter.GetExpandRegexAliases())
result.GetOutputStream().Printf("%s\n", new_command.c_str());
// Pass in true for "no context switching". The command that called us should have set up the context
// appropriately, we shouldn't have to redo that.
return m_interpreter.HandleCommand(new_command.c_str(), eLazyBoolCalculate, result, nullptr, true, true);
}
}
result.SetStatus(eReturnStatusFailed);
if (GetSyntax() != nullptr)
result.AppendError (GetSyntax());
else
result.AppendErrorWithFormat ("Command contents '%s' failed to match any regular expression in the '%s' regex command.\n",
command,
m_cmd_name.c_str());
return false;
}
result.AppendError("empty command passed to regular expression command");
result.SetStatus(eReturnStatusFailed);
return false;
}
bool
CommandObjectRegexCommand::AddRegexCommand (const char *re_cstr, const char *command_cstr)
{
m_entries.resize(m_entries.size() + 1);
// Only add the regular expression if it compiles
if (m_entries.back().regex.Compile (re_cstr))
{
m_entries.back().command.assign (command_cstr);
return true;
}
// The regex didn't compile...
m_entries.pop_back();
return false;
}
int
CommandObjectRegexCommand::HandleCompletion (Args &input,
int &cursor_index,
int &cursor_char_position,
int match_start_point,
int max_return_elements,
bool &word_complete,
StringList &matches)
{
if (m_completion_type_mask)
{
std::string completion_str (input.GetArgumentAtIndex (cursor_index), cursor_char_position);
CommandCompletions::InvokeCommonCompletionCallbacks (m_interpreter,
m_completion_type_mask,
completion_str.c_str(),
match_start_point,
max_return_elements,
nullptr,
word_complete,
matches);
return matches.GetSize();
}
else
{
matches.Clear();
word_complete = false;
}
return 0;
}
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