forked from OSchip/llvm-project
97 lines
3.8 KiB
C++
97 lines
3.8 KiB
C++
//===-- CommandObjectRegexCommand.cpp ---------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Interpreter/CommandObjectRegexCommand.h"
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#include "lldb/Interpreter/CommandInterpreter.h"
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#include "lldb/Interpreter/CommandReturnObject.h"
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using namespace lldb;
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using namespace lldb_private;
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// CommandObjectRegexCommand constructor
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CommandObjectRegexCommand::CommandObjectRegexCommand(
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CommandInterpreter &interpreter, llvm::StringRef name, llvm::StringRef help,
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llvm::StringRef syntax, uint32_t max_matches, uint32_t completion_type_mask,
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bool is_removable)
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: CommandObjectRaw(interpreter, name, help, syntax),
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m_max_matches(max_matches), m_completion_type_mask(completion_type_mask),
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m_entries(), m_is_removable(is_removable) {}
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// Destructor
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CommandObjectRegexCommand::~CommandObjectRegexCommand() {}
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bool CommandObjectRegexCommand::DoExecute(llvm::StringRef command,
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CommandReturnObject &result) {
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EntryCollection::const_iterator pos, end = m_entries.end();
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for (pos = m_entries.begin(); pos != end; ++pos) {
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RegularExpression::Match regex_match(m_max_matches);
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if (pos->regex.Execute(command, ®ex_match)) {
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std::string new_command(pos->command);
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std::string match_str;
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char percent_var[8];
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size_t idx, percent_var_idx;
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for (uint32_t match_idx = 1; match_idx <= m_max_matches; ++match_idx) {
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if (regex_match.GetMatchAtIndex(command, match_idx, match_str)) {
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const int percent_var_len =
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::snprintf(percent_var, sizeof(percent_var), "%%%u", match_idx);
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for (idx = 0; (percent_var_idx = new_command.find(
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percent_var, idx)) != std::string::npos;) {
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new_command.erase(percent_var_idx, percent_var_len);
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new_command.insert(percent_var_idx, match_str);
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idx += percent_var_idx + match_str.size();
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}
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}
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}
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// Interpret the new command and return this as the result!
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if (m_interpreter.GetExpandRegexAliases())
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result.GetOutputStream().Printf("%s\n", new_command.c_str());
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// Pass in true for "no context switching". The command that called us
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// should have set up the context appropriately, we shouldn't have to
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// redo that.
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return m_interpreter.HandleCommand(
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new_command.c_str(), eLazyBoolCalculate, result, nullptr, true, true);
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}
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}
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result.SetStatus(eReturnStatusFailed);
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if (!GetSyntax().empty())
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result.AppendError(GetSyntax());
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else
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result.GetOutputStream() << "Command contents '" << command
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<< "' failed to match any "
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"regular expression in the '"
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<< m_cmd_name << "' regex ";
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return false;
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}
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bool CommandObjectRegexCommand::AddRegexCommand(const char *re_cstr,
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const char *command_cstr) {
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m_entries.resize(m_entries.size() + 1);
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// Only add the regular expression if it compiles
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if (m_entries.back().regex.Compile(
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llvm::StringRef::withNullAsEmpty(re_cstr))) {
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m_entries.back().command.assign(command_cstr);
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return true;
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}
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// The regex didn't compile...
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m_entries.pop_back();
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return false;
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}
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int CommandObjectRegexCommand::HandleCompletion(CompletionRequest &request) {
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if (m_completion_type_mask) {
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CommandCompletions::InvokeCommonCompletionCallbacks(
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GetCommandInterpreter(), m_completion_type_mask, request, nullptr);
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return request.GetNumberOfMatches();
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} else {
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request.SetWordComplete(false);
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}
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return 0;
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}
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