forked from OSchip/llvm-project
115 lines
3.9 KiB
C++
115 lines
3.9 KiB
C++
//===-- CommandObjectRegexCommand.cpp ---------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/lldb-python.h"
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#include "lldb/Interpreter/CommandObjectRegexCommand.h"
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// C Includes
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// C++ Includes
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// Other libraries and framework includes
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// Project includes
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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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//----------------------------------------------------------------------
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// CommandObjectRegexCommand constructor
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//----------------------------------------------------------------------
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CommandObjectRegexCommand::CommandObjectRegexCommand
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(
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CommandInterpreter &interpreter,
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const char *name,
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const char *help,
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const char *syntax,
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uint32_t max_matches
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) :
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CommandObjectRaw (interpreter, name, help, syntax),
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m_max_matches (max_matches),
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m_entries ()
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{
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}
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//----------------------------------------------------------------------
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// Destructor
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//----------------------------------------------------------------------
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CommandObjectRegexCommand::~CommandObjectRegexCommand()
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{
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}
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bool
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CommandObjectRegexCommand::DoExecute
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(
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const char *command,
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CommandReturnObject &result
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)
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{
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if (command)
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{
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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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{
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if (pos->regex.Execute (command, m_max_matches))
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{
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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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{
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if (pos->regex.GetMatchAtIndex (command, match_idx, match_str))
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{
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const int percent_var_len = ::snprintf (percent_var, sizeof(percent_var), "%%%u", match_idx);
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for (idx = 0; (percent_var_idx = new_command.find(percent_var, idx)) != std::string::npos; )
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{
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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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return m_interpreter.HandleCommand(new_command.c_str(), eLazyBoolCalculate, result);
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}
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}
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result.SetStatus(eReturnStatusFailed);
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if (GetSyntax() != NULL)
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result.AppendError (GetSyntax());
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else
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result.AppendErrorWithFormat ("Command contents '%s' failed to match any regular expression in the '%s' regex command.\n",
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command,
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m_cmd_name.c_str());
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return false;
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}
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result.AppendError("empty command passed to regular expression command");
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result.SetStatus(eReturnStatusFailed);
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return false;
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}
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bool
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CommandObjectRegexCommand::AddRegexCommand (const char *re_cstr, const char *command_cstr)
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{
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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 (re_cstr, REG_EXTENDED))
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{
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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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