external/bsd/kyua-cli/dist/utils/config/keys.cpp

   1 // Copyright 2012 Google Inc.
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  28
  29 #include "utils/config/tree.ipp"
  30
  31 #include "utils/config/exceptions.hpp"
  32 #include "utils/format/macros.hpp"
  33 #include "utils/text/operations.hpp"
  34
  35 namespace config = utils::config;
  36 namespace text = utils::text;
  37
  38
  39 /// Converts a key to its textual representation.
  40 ///
  41 /// \param key The key to convert.
  42 std::string
  43 utils::config::detail::flatten_key(const tree_key& key)
  44 {
  45     PRE(!key.empty());
  46     return text::join(key, ".");
  47 }
  48
  49
  50 /// Parses and validates a textual key.
  51 ///
  52 /// \param str The key to process in dotted notation.
  53 ///
  54 /// \return The tokenized key if valid.
  55 ///
  56 /// \throw invalid_key_error If the input key is empty or invalid for any other
  57 ///     reason.  Invalid does NOT mean unknown though.
  58 utils::config::detail::tree_key
  59 utils::config::detail::parse_key(const std::string& str)
  60 {
  61     const tree_key key = text::split(str, '.');
  62     if (key.empty())
  63         throw invalid_key_error("Empty key");
  64     for (tree_key::const_iterator iter = key.begin(); iter != key.end(); iter++)
  65         if ((*iter).empty())
  66             throw invalid_key_error(F("Empty component in key '%s'") % str);
  67     return key;
  68 }