C++ StringList::AppendString方法代码示例

bool
TargetInstanceSettings::GetInstanceSettingsValue (const SettingEntry &entry,
        const ConstString &var_name,
        StringList &value,
        Error *err)
{
    if (var_name == GetSettingNameForExpressionPrefix ())
    {
        value.AppendString (m_expr_prefix_path.c_str(), m_expr_prefix_path.size());
    }
    else if (var_name == GetSettingNameForExecutionLevel ())
    {
        value.AppendString (UserSettingsController::EnumToString (entry.enum_values, m_execution_level));
    }
    else if (var_name == GetSettingNameForExecutionMode ())
    {
        value.AppendString (UserSettingsController::EnumToString (entry.enum_values, m_execution_mode));
    }
    else if (var_name == GetSettingNameForExecutionOSType ())
    {
        value.AppendString (UserSettingsController::EnumToString (entry.enum_values, m_execution_os_type));
    }
    else
    {
        if (err)
            err->SetErrorStringWithFormat ("unrecognized variable name '%s'", var_name.AsCString());
        return false;
    }

    return true;
}

size_t
OptionValueEnumeration::AutoComplete (CommandInterpreter &interpreter,
                                      const char *s,
                                      int match_start_point,
                                      int max_return_elements,
                                      bool &word_complete,
                                      StringList &matches)
{
    word_complete = false;
    matches.Clear();
    
    const uint32_t num_enumerators = m_enumerations.GetSize();
    if (s && s[0])
    {
        const size_t s_len = strlen(s);
        for (size_t i=0; i<num_enumerators; ++i)
        {
            const char *name = m_enumerations.GetCStringAtIndex(i);
            if (::strncmp(s, name, s_len) == 0)
                matches.AppendString(name);
        }
    }
    else
    {
        // only suggest "true" or "false" by default
        for (size_t i=0; i<num_enumerators; ++i)
            matches.AppendString(m_enumerations.GetCStringAtIndex(i));
    }
    return matches.GetSize();
}

void
CommandInterpreter::AproposAllSubCommands (CommandObject *cmd_obj, const char *prefix, const char *search_word,
                                           StringList &commands_found, StringList &commands_help)
{
    CommandObject::CommandMap::const_iterator pos;
    CommandObject::CommandMap sub_cmd_dict = ((CommandObjectMultiword *) cmd_obj)->m_subcommand_dict;
    CommandObject *sub_cmd_obj;

    for (pos = sub_cmd_dict.begin(); pos != sub_cmd_dict.end(); ++pos)
    {
          const char * command_name = pos->first.c_str();
          sub_cmd_obj = pos->second.get();
          StreamString complete_command_name;
          
          complete_command_name.Printf ("%s %s", prefix, command_name);

          if (sub_cmd_obj->HelpTextContainsWord (search_word))
          {
              commands_found.AppendString (complete_command_name.GetData());
              commands_help.AppendString (sub_cmd_obj->GetHelp());
          }

          if (sub_cmd_obj->IsMultiwordObject())
              AproposAllSubCommands (sub_cmd_obj, complete_command_name.GetData(), search_word, commands_found,
                                     commands_help);
    }

}

  bool DoExecute(Args &command, CommandReturnObject &result) override {
    StringList commands;
    commands.AppendString("thread backtrace");

    Thread *thread = m_exe_ctx.GetThreadPtr();
    if (thread) {
      char command_buffer[256];

      uint32_t frame_count = thread->GetStackFrameCount();
      for (uint32_t i = 0; i < frame_count; ++i) {
        StackFrameSP frame = thread->GetStackFrameAtIndex(i);
        lldb::addr_t pc = frame->GetStackID().GetPC();

        snprintf(command_buffer, sizeof(command_buffer),
                 "disassemble --bytes --address 0x%" PRIx64, pc);
        commands.AppendString(command_buffer);

        snprintf(command_buffer, sizeof(command_buffer),
                 "image show-unwind --address 0x%" PRIx64, pc);
        commands.AppendString(command_buffer);
      }
    }

    const FileSpec &outfile_spec =
        m_outfile_options.GetFile().GetCurrentValue();
    if (outfile_spec) {
      char path[PATH_MAX];
      outfile_spec.GetPath(path, sizeof(path));

      uint32_t open_options =
          File::eOpenOptionWrite | File::eOpenOptionCanCreate |
          File::eOpenOptionAppend | File::eOpenOptionCloseOnExec;

      const bool append = m_outfile_options.GetAppend().GetCurrentValue();
      if (!append)
        open_options |= File::eOpenOptionTruncate;

      StreamFileSP outfile_stream = std::make_shared<StreamFile>();
      Status error = outfile_stream->GetFile().Open(path, open_options);
      if (error.Fail()) {
        result.AppendErrorWithFormat("Failed to open file '%s' for %s: %s\n",
                                     path, append ? "append" : "write",
                                     error.AsCString());
        result.SetStatus(eReturnStatusFailed);
        return false;
      }

      result.SetImmediateOutputStream(outfile_stream);
    }

    CommandInterpreterRunOptions options;
    options.SetStopOnError(false);
    options.SetEchoCommands(true);
    options.SetPrintResults(true);
    options.SetAddToHistory(false);
    m_interpreter.HandleCommands(commands, &m_exe_ctx, options, result);

    return result.Succeeded();
  }

void Log::AutoCompleteChannelName(const char *channel_name,
                                  StringList &matches) {
  LogChannelMap &map = GetChannelMap();
  LogChannelMapIter pos, end = map.end();
  for (pos = map.begin(); pos != end; ++pos) {
    const char *pos_channel_name = pos->first.GetCString();
    if (channel_name && channel_name[0]) {
      if (NameMatches(channel_name, eNameMatchStartsWith, pos_channel_name)) {
        matches.AppendString(pos_channel_name);
      }
    } else
      matches.AppendString(pos_channel_name);
  }
}

size_t
FileSpec::ResolvePartialUsername (const char *partial_name, StringList &matches)
{
#ifdef LLDB_CONFIG_TILDE_RESOLVES_TO_USER
    size_t extant_entries = matches.GetSize();

    setpwent();
    struct passwd *user_entry;
    const char *name_start = partial_name + 1;
    std::set<std::string> name_list;

    while ((user_entry = getpwent()) != NULL)
    {
        if (strstr(user_entry->pw_name, name_start) == user_entry->pw_name)
        {
            std::string tmp_buf("~");
            tmp_buf.append(user_entry->pw_name);
            tmp_buf.push_back('/');
            name_list.insert(tmp_buf);
        }
    }
    std::set<std::string>::iterator pos, end = name_list.end();
    for (pos = name_list.begin(); pos != end; pos++)
    {
        matches.AppendString((*pos).c_str());
    }
    return matches.GetSize() - extant_entries;
#else
    // Resolving home directories is not supported, just copy the path...
    return 0;
#endif // #ifdef LLDB_CONFIG_TILDE_RESOLVES_TO_USER    
}

size_t
StringList::AutoComplete (const char *s, StringList &matches, size_t &exact_idx) const
{
    matches.Clear();
    exact_idx = SIZE_MAX;
    if (s && s[0])
    {
        const size_t s_len = strlen (s);
        const size_t num_strings = m_strings.size();
        
        for (size_t i=0; i<num_strings; ++i)
        {
            if (m_strings[i].find(s) == 0)
            {
                if (exact_idx == SIZE_MAX && m_strings[i].size() == s_len)
                    exact_idx = matches.GetSize();
                matches.AppendString (m_strings[i]);
            }
        }
    }
    else
    {
        // No string, so it matches everything
        matches = *this;
    }
    return matches.GetSize();
}

size_t Host::GetEnvironment(StringList &env) {
  char **host_env = environ;
  char *env_entry;
  size_t i;
  for (i = 0; (env_entry = host_env[i]) != NULL; ++i)
    env.AppendString(env_entry);
  return i;
}

size_t
OptionValueBoolean::AutoComplete (CommandInterpreter &interpreter,
                                  const char *s,
                                  int match_start_point,
                                  int max_return_elements,
                                  bool &word_complete,
                                  StringList &matches)
{
    word_complete = false;
    matches.Clear();
    struct StringEntry {
        const char *string;
        const size_t length;
    };
    static const StringEntry g_autocomplete_entries[] =
    {
        { "true" , 4 },
        { "false", 5 },
        { "on"   , 2 },
        { "off"  , 3 },
        { "yes"  , 3 },
        { "no"   , 2 },
        { "1"    , 1 },
        { "0"    , 1 },
    };
    const size_t k_num_autocomplete_entries = llvm::array_lengthof(g_autocomplete_entries);
    
    if (s && s[0])
    {
        const size_t s_len = strlen(s);
        for (size_t i=0; i<k_num_autocomplete_entries; ++i)
        {
            if (s_len <= g_autocomplete_entries[i].length)
                if (::strncasecmp(s, g_autocomplete_entries[i].string, s_len) == 0)
                    matches.AppendString(g_autocomplete_entries[i].string);
        }
    }
    else
    {
        // only suggest "true" or "false" by default
        for (size_t i=0; i<2; ++i)
            matches.AppendString(g_autocomplete_entries[i].string);
    }
    return matches.GetSize();
}

uint32_t
ArchSpec::AutoComplete (const char *name, StringList &matches)
{
    uint32_t i;
    if (name && name[0])
    {
        for (i = 0; i < ArchSpec::kNumCores; ++i)
        {
            if (NameMatches(g_core_definitions[i].name, eNameMatchStartsWith, name))
                matches.AppendString (g_core_definitions[i].name);
        }
    }
    else
    {
        for (i = 0; i < ArchSpec::kNumCores; ++i)
            matches.AppendString (g_core_definitions[i].name);
    }
    return matches.GetSize();
}

uint32_t
Host::ListProcessesMatchingName (const char *name, StringList &matches, std::vector<lldb::pid_t> &pids)
{
    uint32_t num_matches = 0;

#if defined (__APPLE__)
    int num_pids;
    int size_of_pids;
    std::vector<int> pid_list;
    
    size_of_pids = proc_listpids(PROC_ALL_PIDS, 0, NULL, 0);
    if (size_of_pids == -1)
        return 0;
        
    num_pids = size_of_pids/sizeof(int);
    
    pid_list.resize (size_of_pids);
    size_of_pids = proc_listpids(PROC_ALL_PIDS, 0, &pid_list[0], size_of_pids);
    if (size_of_pids == -1)
        return 0;
        
    lldb::pid_t our_pid = getpid();
    
    for (int i = 0; i < num_pids; i++)
    {
        struct proc_bsdinfo bsd_info;
        int error = proc_pidinfo (pid_list[i], PROC_PIDTBSDINFO, (uint64_t) 0, &bsd_info, PROC_PIDTBSDINFO_SIZE);
        if (error == 0)
            continue;
        
        // Don't offer to attach to zombie processes, already traced or exiting
        // processes, and of course, ourselves...  It looks like passing the second arg of
        // 0 to proc_listpids will exclude zombies anyway, but that's not documented so...
        if (((bsd_info.pbi_flags & (PROC_FLAG_TRACED | PROC_FLAG_INEXIT)) != 0)
             || (bsd_info.pbi_status == SZOMB)
             || (bsd_info.pbi_pid == our_pid))
             continue;
        char pid_name[MAXCOMLEN * 2 + 1];
        int name_len;
        name_len = proc_name(bsd_info.pbi_pid, pid_name, MAXCOMLEN * 2);
        if (name_len == 0)
            continue;
        
        if (strstr(pid_name, name) != pid_name)
            continue;
        matches.AppendString (pid_name);
        pids.push_back (bsd_info.pbi_pid);
        num_matches++;        
    }
#endif
    
    return num_matches;
}

int REPL::IOHandlerComplete(IOHandler &io_handler, const char *current_line,
                            const char *cursor, const char *last_char,
                            int skip_first_n_matches, int max_matches,
                            StringList &matches) {
  matches.Clear();

  llvm::StringRef line(current_line, cursor - current_line);

  // Complete an LLDB command if the first character is a colon...
  if (!line.empty() && line[0] == ':') {
    Debugger &debugger = m_target.GetDebugger();

    // auto complete LLDB commands
    const char *lldb_current_line = line.substr(1).data();
    return debugger.GetCommandInterpreter().HandleCompletion(
        lldb_current_line, cursor, last_char, skip_first_n_matches, max_matches,
        matches);
  }

  // Strip spaces from the line and see if we had only spaces
  line = line.ltrim();
  if (line.empty()) {
    // Only spaces on this line, so just indent
    matches.AppendString(m_indent_str);
    return 1;
  }

  std::string current_code;
  current_code.append(m_code.CopyList());

  IOHandlerEditline &editline = static_cast<IOHandlerEditline &>(io_handler);
  const StringList *current_lines = editline.GetCurrentLines();
  if (current_lines) {
    const uint32_t current_line_idx = editline.GetCurrentLineIndex();

    if (current_line_idx < current_lines->GetSize()) {
      for (uint32_t i = 0; i < current_line_idx; ++i) {
        const char *line_cstr = current_lines->GetStringAtIndex(i);
        if (line_cstr) {
          current_code.append("\n");
          current_code.append(line_cstr);
        }
      }
    }
  }

  if (cursor > current_line) {
    current_code.append("\n");
    current_code.append(current_line, cursor - current_line);
  }

  return CompleteCode(current_code, matches);
}

size_t
Host::GetEnvironment (StringList &env)
{
    char *v;
    char **var = environ;
    for (; var != NULL && *var != NULL; ++var)
    {
        v = strchr(*var, (int)'-');
        if (v == NULL)
            continue;
        env.AppendString(v);
    }
    return env.GetSize();
}

size_t
Host::GetEnvironment(StringList &env)
{
    // The environment block on Windows is a contiguous buffer of NULL terminated strings,
    // where the end of the environment block is indicated by two consecutive NULLs.
    LPCH environment_block = ::GetEnvironmentStrings();
    env.Clear();
    while (*environment_block != '\0')
    {
        llvm::StringRef current_var(environment_block);
        if (current_var[0] != '=')
            env.AppendString(current_var);

        environment_block += current_var.size()+1;
    }
    return env.GetSize();
}

size_t
OptionValueUUID::AutoComplete (CommandInterpreter &interpreter,
                               const char *s,
                               int match_start_point,
                               int max_return_elements,
                               bool &word_complete,
                               StringList &matches)
{
    word_complete = false;
    matches.Clear();
    ExecutionContext exe_ctx(interpreter.GetExecutionContext());
    Target *target = exe_ctx.GetTargetPtr();
    if (target)
    {
        const size_t num_modules = target->GetImages().GetSize();
        if (num_modules > 0)
        {
            UUID::ValueType uuid_bytes;
            const size_t num_bytes_decoded = UUID::DecodeUUIDBytesFromCString(s, uuid_bytes, NULL);
            for (size_t i=0; i<num_modules; ++i)
            {
                ModuleSP module_sp (target->GetImages().GetModuleAtIndex(i));
                if (module_sp)
                {
                    const UUID &module_uuid = module_sp->GetUUID();
                    if (module_uuid.IsValid())
                    {
                        bool add_uuid = false;
                        if (num_bytes_decoded == 0)
                            add_uuid = true;
                        else
                            add_uuid = ::memcmp(module_uuid.GetBytes(), uuid_bytes, num_bytes_decoded) == 0;
                        if (add_uuid)
                        {
                            std::string uuid_str;
                            uuid_str = module_uuid.GetAsString();
                            if (!uuid_str.empty())
                                matches.AppendString(uuid_str.c_str());
                        }
                    }
                }
            }
        }
    }
    return matches.GetSize();
}