xref: /freebsd/contrib/kyua/utils/config/keys.cpp (revision b0d29bc47dba79f6f38e67eabadfb4b32ffd9390)

// Copyright 2012 The Kyua Authors.
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
//   notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
//   notice, this list of conditions and the following disclaimer in the
//   documentation and/or other materials provided with the distribution.
// * Neither the name of Google Inc. nor the names of its contributors
//   may be used to endorse or promote products derived from this software
//   without specific prior written permission.
//
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#include "utils/config/tree.ipp"

#include "utils/config/exceptions.hpp"
#include "utils/format/macros.hpp"
#include "utils/text/operations.hpp"

namespace config = utils::config;
namespace text = utils::text;


/// Converts a key to its textual representation.
///
/// \param key The key to convert.
///
/// \return a flattened representation of \p key, "."-joined.
std::string
utils::config::detail::flatten_key(const tree_key& key)
{
    PRE(!key.empty());
    return text::join(key, ".");
}


/// Parses and validates a textual key.
///
/// \param str The key to process in dotted notation.
///
/// \return The tokenized key if valid.
///
/// \throw invalid_key_error If the input key is empty or invalid for any other
///     reason.  Invalid does NOT mean unknown though.
utils::config::detail::tree_key
utils::config::detail::parse_key(const std::string& str)
{
    const tree_key key = text::split(str, '.');
    if (key.empty())
        throw invalid_key_error("Empty key");
    for (tree_key::const_iterator iter = key.begin(); iter != key.end(); iter++)
        if ((*iter).empty())
            throw invalid_key_error(F("Empty component in key '%s'") % str);
    return key;
}