C++ Args::Clear方法代码示例

size_t OptionValueDictionary::GetArgs(Args &args) const {
  args.Clear();
  collection::const_iterator pos, end = m_values.end();
  for (pos = m_values.begin(); pos != end; ++pos) {
    StreamString strm;
    strm.Printf("%s=", pos->first.GetCString());
    pos->second->DumpValue(nullptr, strm, eDumpOptionValue | eDumpOptionRaw);
    args.AppendArgument(strm.GetString());
  }
  return args.GetArgumentCount();
}

size_t OptionValueArray::GetArgs(Args &args) const {
  args.Clear();
  const uint32_t size = m_values.size();
  for (uint32_t i = 0; i < size; ++i) {
    llvm::StringRef string_value = m_values[i]->GetStringValue();
    if (!string_value.empty())
      args.AppendArgument(string_value);
  }

  return args.GetArgumentCount();
}

size_t OptionValueArray::GetArgs(Args &args) const {
  const uint32_t size = m_values.size();
  std::vector<const char *> argv;
  for (uint32_t i = 0; i < size; ++i) {
    const char *string_value = m_values[i]->GetStringValue();
    if (string_value)
      argv.push_back(string_value);
  }

  if (argv.empty())
    args.Clear();
  else
    args.SetArguments(argv.size(), &argv[0]);
  return args.GetArgumentCount();
}

void
BreakpointIDList::FindAndReplaceIDRanges (Args &old_args, Target *target, CommandReturnObject &result,
                                          Args &new_args)
{
    std::string range_start;
    const char *range_end;
    const char *current_arg;
    const size_t num_old_args = old_args.GetArgumentCount();

    for (size_t i = 0; i < num_old_args; ++i)
    {
        bool is_range = false;
        current_arg = old_args.GetArgumentAtIndex (i);

        uint32_t range_start_len = 0;
        uint32_t range_end_pos = 0;
        if (BreakpointIDList::StringContainsIDRangeExpression (current_arg, &range_start_len, &range_end_pos))
        {
            is_range = true;
            range_start = (char *) malloc (range_start_len + 1);
            range_start.assign (current_arg, range_start_len);
            range_end = current_arg + range_end_pos;
        }
        else if ((i + 2 < num_old_args)
                 && BreakpointID::IsRangeIdentifier (old_args.GetArgumentAtIndex (i+1))
                 && BreakpointID::IsValidIDExpression (current_arg)
                 && BreakpointID::IsValidIDExpression (old_args.GetArgumentAtIndex (i+2)))
        {
            range_start.assign (current_arg);
            range_end = old_args.GetArgumentAtIndex (i+2);
            is_range = true;
            i = i+2;
        }

        if (is_range)
        {
            break_id_t start_bp_id;
            break_id_t end_bp_id;
            break_id_t start_loc_id;
            break_id_t end_loc_id;

            BreakpointID::ParseCanonicalReference (range_start.c_str(), &start_bp_id, &start_loc_id);
            BreakpointID::ParseCanonicalReference (range_end, &end_bp_id, &end_loc_id);

            if ((start_bp_id == LLDB_INVALID_BREAK_ID)
                || (! target->GetBreakpointByID (start_bp_id)))
            {
                new_args.Clear();
                result.AppendErrorWithFormat ("'%s' is not a valid breakpoint ID.\n", range_start.c_str());
                result.SetStatus (eReturnStatusFailed);
                return;
            }

            if ((end_bp_id == LLDB_INVALID_BREAK_ID)
                || (! target->GetBreakpointByID (end_bp_id)))
            {
                new_args.Clear();
                result.AppendErrorWithFormat ("'%s' is not a valid breakpoint ID.\n", range_end);
                result.SetStatus (eReturnStatusFailed);
                return;
            }

            // We have valid range starting & ending breakpoint IDs.  Go through all the breakpoints in the
            // target and find all the breakpoints that fit into this range, and add them to new_args.

            const BreakpointList& breakpoints = target->GetBreakpointList();
            const size_t num_breakpoints = breakpoints.GetSize();
            for (size_t j = 0; j < num_breakpoints; ++j)
            {
                Breakpoint *breakpoint = breakpoints.GetBreakpointByIndex (j).get();
                break_id_t cur_bp_id = breakpoint->GetID();

                if ((cur_bp_id < start_bp_id) || (cur_bp_id > end_bp_id))
                    continue;

                const size_t num_locations = breakpoint->GetNumLocations();

                if ((cur_bp_id == start_bp_id) && (start_loc_id != LLDB_INVALID_BREAK_ID))
                {
                    for (size_t k = 0; k < num_locations; ++k)
                    {
                        BreakpointLocation * bp_loc = breakpoint->GetLocationAtIndex(k).get();
                        if (bp_loc->GetID() >= start_loc_id)
                        {
                            StreamString canonical_id_str;
                            BreakpointID::GetCanonicalReference (&canonical_id_str, cur_bp_id, bp_loc->GetID());
                            new_args.AppendArgument (canonical_id_str.GetData());
                        }
                    }
                }
                else if ((cur_bp_id == end_bp_id) && (end_loc_id != LLDB_INVALID_BREAK_ID))
                {
                    for (size_t k = 0; k < num_locations; ++k)
                    {
                        BreakpointLocation * bp_loc = breakpoint->GetLocationAtIndex(k).get();
                        if (bp_loc->GetID() <= end_loc_id)
                        {
                            StreamString canonical_id_str;
                            BreakpointID::GetCanonicalReference (&canonical_id_str, cur_bp_id, bp_loc->GetID());
                            new_args.AppendArgument (canonical_id_str.GetData());
//.........这里部分代码省略.........

void
CommandInterpreter::BuildAliasCommandArgs
(
    CommandObject *alias_cmd_obj,
    const char *alias_name,
    Args &cmd_args,
    CommandReturnObject &result
)
{
    OptionArgVectorSP option_arg_vector_sp = GetAliasOptions (alias_name);

    if (option_arg_vector_sp.get())
    {
        // Make sure that the alias name is the 0th element in cmd_args
        std::string alias_name_str = alias_name;
        if (alias_name_str.compare (cmd_args.GetArgumentAtIndex(0)) != 0)
            cmd_args.Unshift (alias_name);

        Args new_args (alias_cmd_obj->GetCommandName());
        if (new_args.GetArgumentCount() == 2)
            new_args.Shift();

        OptionArgVector *option_arg_vector = option_arg_vector_sp.get();
        int old_size = cmd_args.GetArgumentCount();
        int *used = (int *) malloc ((old_size + 1) * sizeof (int));

        memset (used, 0, (old_size + 1) * sizeof (int));
        used[0] = 1;

        for (int i = 0; i < option_arg_vector->size(); ++i)
        {
            OptionArgPair option_pair = (*option_arg_vector)[i];
            std::string option = option_pair.first;
            std::string value = option_pair.second;
            if (option.compare ("<argument>") == 0)
                new_args.AppendArgument (value.c_str());
            else
            {
                new_args.AppendArgument (option.c_str());
                if (value.compare ("<no-argument>") != 0)
                {
                    int index = GetOptionArgumentPosition (value.c_str());
                    if (index == 0)
                        // value was NOT a positional argument; must be a real value
                        new_args.AppendArgument (value.c_str());
                    else if (index >= cmd_args.GetArgumentCount())
                    {
                        result.AppendErrorWithFormat
                                    ("Not enough arguments provided; you need at least %d arguments to use this alias.\n",
                                     index);
                        result.SetStatus (eReturnStatusFailed);
                        return;
                    }
                    else
                    {
                        new_args.AppendArgument (cmd_args.GetArgumentAtIndex (index));
                        used[index] = 1;
                    }
                }
            }
        }

        for (int j = 0; j < cmd_args.GetArgumentCount(); ++j)
        {
            if (!used[j])
                new_args.AppendArgument (cmd_args.GetArgumentAtIndex (j));
        }

        cmd_args.Clear();
        cmd_args.SetArguments (new_args.GetArgumentCount(), (const char **) new_args.GetArgumentVector());
    }
    else
    {
        result.SetStatus (eReturnStatusSuccessFinishNoResult);
        // This alias was not created with any options; nothing further needs to be done.
        return;
    }

    result.SetStatus (eReturnStatusSuccessFinishNoResult);
    return;
}