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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 "CommandObjectRegexCommand.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/CommandReturnObject.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/Error.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 completion_type_mask, bool is_removable)
: CommandObjectRaw(interpreter, name, help, syntax),
m_completion_type_mask(completion_type_mask),
m_is_removable(is_removable) {}
// Destructor
CommandObjectRegexCommand::~CommandObjectRegexCommand() = default;
llvm::Expected<std::string> CommandObjectRegexCommand::SubstituteVariables(
llvm::StringRef input,
const llvm::SmallVectorImpl<llvm::StringRef> &replacements) {
std::string buffer;
llvm::raw_string_ostream output(buffer);
llvm::SmallVector<llvm::StringRef, 4> parts;
input.split(parts, '%');
output << parts[0];
for (llvm::StringRef part : drop_begin(parts)) {
size_t idx = 0;
if (part.consumeInteger(10, idx))
output << '%';
else if (idx < replacements.size())
output << replacements[idx];
else
return llvm::make_error<llvm::StringError>(
llvm::formatv("%{0} is out of range: not enough arguments specified",
idx),
llvm::errc::invalid_argument);
output << part;
}
return buffer;
}
void 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)) {
llvm::Expected<std::string> new_command =
SubstituteVariables(pos->command, matches);
if (!new_command) {
result.SetError(new_command.takeError());
return;
}
// Interpret the new command and return this as the result!
if (m_interpreter.GetExpandRegexAliases())
result.GetOutputStream().Printf("%s\n", new_command->c_str());
// We don't have to pass an override_context here, as the command that
// called us should have set up the context appropriately.
bool force_repeat_command = true;
m_interpreter.HandleCommand(new_command->c_str(), eLazyBoolNo, result,
force_repeat_command);
return;
}
}
result.SetStatus(eReturnStatusFailed);
if (!GetSyntax().empty())
result.AppendError(GetSyntax());
else
result.GetErrorStream() << "Command contents '" << command
<< "' failed to match any "
"regular expression in the '"
<< m_cmd_name << "' regex ";
}
bool CommandObjectRegexCommand::AddRegexCommand(llvm::StringRef re_cstr,
llvm::StringRef command_cstr) {
m_entries.resize(m_entries.size() + 1);
// Only add the regular expression if it compiles
m_entries.back().regex = RegularExpression(re_cstr);
if (m_entries.back().regex.IsValid()) {
m_entries.back().command = command_cstr.str();
return true;
}
// The regex didn't compile...
m_entries.pop_back();
return false;
}
void CommandObjectRegexCommand::HandleCompletion(CompletionRequest &request) {
if (m_completion_type_mask) {
lldb_private::CommandCompletions::InvokeCommonCompletionCallbacks(
GetCommandInterpreter(), m_completion_type_mask, request, nullptr);
}
}
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