CommandObjectRegexCommand.cpp
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//===-- CommandObjectRegexCommand.cpp -------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lldb/Interpreter/CommandObjectRegexCommand.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"
using namespace lldb;
using namespace lldb_private;
// CommandObjectRegexCommand constructor
CommandObjectRegexCommand::CommandObjectRegexCommand(
CommandInterpreter &interpreter, llvm::StringRef name, llvm::StringRef help,
llvm::StringRef 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(llvm::StringRef command,
CommandReturnObject &result) {
EntryCollection::const_iterator pos, end = m_entries.end();
for (pos = m_entries.begin(); pos != end; ++pos) {
llvm::SmallVector<llvm::StringRef, 4> matches;
if (pos->regex.Execute(command, &matches)) {
std::string new_command(pos->command);
char percent_var[8];
size_t idx, percent_var_idx;
for (uint32_t match_idx = 1; match_idx <= m_max_matches; ++match_idx) {
if (match_idx < matches.size()) {
const std::string match_str = matches[match_idx].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().empty())
result.AppendError(GetSyntax());
else
result.GetOutputStream() << "Command contents '" << command
<< "' failed to match any "
"regular expression in the '"
<< m_cmd_name << "' regex ";
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
m_entries.back().regex =
RegularExpression(llvm::StringRef::withNullAsEmpty(re_cstr));
if (m_entries.back().regex.IsValid()) {
m_entries.back().command.assign(command_cstr);
return true;
}
// The regex didn't compile...
m_entries.pop_back();
return false;
}
void CommandObjectRegexCommand::HandleCompletion(CompletionRequest &request) {
if (m_completion_type_mask) {
CommandCompletions::InvokeCommonCompletionCallbacks(
GetCommandInterpreter(), m_completion_type_mask, request, nullptr);
}
}