8b3af63b89
A lot of comments in LLDB are surrounded by an ASCII line to delimit the begging and end of the comment. Its use is not really consistent across the code base, sometimes the lines are longer, sometimes they are shorter and sometimes they are omitted. Furthermore, it looks kind of weird with the 80 column limit, where the comment actually extends past the line, but not by much. Furthermore, when /// is used for Doxygen comments, it looks particularly odd. And when // is used, it incorrectly gives the impression that it's actually a Doxygen comment. I assume these lines were added to improve distinguishing between comments and code. However, given that todays editors and IDEs do a great job at highlighting comments, I think it's worth to drop this for the sake of consistency. The alternative is fixing all the inconsistencies, which would create a lot more churn. Differential revision: https://reviews.llvm.org/D60508 llvm-svn: 358135
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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