1 //===-- CommandObjectRegexCommand.cpp -------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "CommandObjectRegexCommand.h"
10 #include "lldb/Interpreter/CommandInterpreter.h"
11 #include "lldb/Interpreter/CommandReturnObject.h"
12
13 using namespace lldb;
14 using namespace lldb_private;
15
16 // CommandObjectRegexCommand constructor
CommandObjectRegexCommand(CommandInterpreter & interpreter,llvm::StringRef name,llvm::StringRef help,llvm::StringRef syntax,uint32_t max_matches,uint32_t completion_type_mask,bool is_removable)17 CommandObjectRegexCommand::CommandObjectRegexCommand(
18 CommandInterpreter &interpreter, llvm::StringRef name, llvm::StringRef help,
19 llvm::StringRef syntax, uint32_t max_matches, uint32_t completion_type_mask,
20 bool is_removable)
21 : CommandObjectRaw(interpreter, name, help, syntax),
22 m_max_matches(max_matches), m_completion_type_mask(completion_type_mask),
23 m_entries(), m_is_removable(is_removable) {}
24
25 // Destructor
~CommandObjectRegexCommand()26 CommandObjectRegexCommand::~CommandObjectRegexCommand() {}
27
DoExecute(llvm::StringRef command,CommandReturnObject & result)28 bool CommandObjectRegexCommand::DoExecute(llvm::StringRef command,
29 CommandReturnObject &result) {
30 EntryCollection::const_iterator pos, end = m_entries.end();
31 for (pos = m_entries.begin(); pos != end; ++pos) {
32 llvm::SmallVector<llvm::StringRef, 4> matches;
33 if (pos->regex.Execute(command, &matches)) {
34 std::string new_command(pos->command);
35 char percent_var[8];
36 size_t idx, percent_var_idx;
37 for (uint32_t match_idx = 1; match_idx <= m_max_matches; ++match_idx) {
38 if (match_idx < matches.size()) {
39 const std::string match_str = matches[match_idx].str();
40 const int percent_var_len =
41 ::snprintf(percent_var, sizeof(percent_var), "%%%u", match_idx);
42 for (idx = 0; (percent_var_idx = new_command.find(
43 percent_var, idx)) != std::string::npos;) {
44 new_command.erase(percent_var_idx, percent_var_len);
45 new_command.insert(percent_var_idx, match_str);
46 idx += percent_var_idx + match_str.size();
47 }
48 }
49 }
50 // Interpret the new command and return this as the result!
51 if (m_interpreter.GetExpandRegexAliases())
52 result.GetOutputStream().Printf("%s\n", new_command.c_str());
53 // Pass in true for "no context switching". The command that called us
54 // should have set up the context appropriately, we shouldn't have to
55 // redo that.
56 return m_interpreter.HandleCommand(
57 new_command.c_str(), eLazyBoolCalculate, result, nullptr, true, true);
58 }
59 }
60 result.SetStatus(eReturnStatusFailed);
61 if (!GetSyntax().empty())
62 result.AppendError(GetSyntax());
63 else
64 result.GetOutputStream() << "Command contents '" << command
65 << "' failed to match any "
66 "regular expression in the '"
67 << m_cmd_name << "' regex ";
68 return false;
69 }
70
AddRegexCommand(llvm::StringRef re_cstr,llvm::StringRef command_cstr)71 bool CommandObjectRegexCommand::AddRegexCommand(llvm::StringRef re_cstr,
72 llvm::StringRef command_cstr) {
73 m_entries.resize(m_entries.size() + 1);
74 // Only add the regular expression if it compiles
75 m_entries.back().regex = RegularExpression(re_cstr);
76 if (m_entries.back().regex.IsValid()) {
77 m_entries.back().command = command_cstr.str();
78 return true;
79 }
80 // The regex didn't compile...
81 m_entries.pop_back();
82 return false;
83 }
84
HandleCompletion(CompletionRequest & request)85 void CommandObjectRegexCommand::HandleCompletion(CompletionRequest &request) {
86 if (m_completion_type_mask) {
87 CommandCompletions::InvokeCommonCompletionCallbacks(
88 GetCommandInterpreter(), m_completion_type_mask, request, nullptr);
89 }
90 }
91