2 Copyright (C) 2012-2019 Carl Hetherington <cth@carlh.net>
4 This file is part of libcxml.
6 libcxml is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 libcxml is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with libcxml. If not, see <http://www.gnu.org/licenses/>.
21 #ifndef LIBCXML_CXML_H
22 #define LIBCXML_CXML_H
24 #include <boost/shared_ptr.hpp>
25 #include <boost/optional.hpp>
26 #include <boost/filesystem.hpp>
27 #include <boost/algorithm/string/erase.hpp>
32 /* Hack for OS X compile failure; see https://bugs.launchpad.net/hugin/+bug/910160 */
44 /** @brief An error */
45 class Error : public std::exception
48 /** Construct an Error exception.
49 * @param message Error message.
51 Error (std::string const & message) : _message (message) {}
53 /** Error destructor */
56 /** @return error message. Caller must not free the returned
59 char const * what () const throw () {
60 return _message.c_str ();
68 /** A sort-of version of boost::lexical_cast that does uses the "C"
69 * locale (i.e. no thousands separators and a . for the decimal separator).
71 template <typename P, typename Q>
75 /* We can't write a generic version of raw_convert; all required
76 versions must be specialised.
78 BOOST_STATIC_ASSERT (sizeof(Q) == 0);
83 raw_convert (std::string v);
87 raw_convert (std::string v);
91 raw_convert (std::string v);
93 /** @brief A wrapper for a xmlpp::Node which simplifies parsing */
99 /** Construct a Node from an xmlpp::Node. This class will
100 * not destroy the xmlpp::Node.
101 * @param node xmlpp::Node.
103 Node (xmlpp::Node* node);
105 std::string name () const;
107 /* A set of methods which look up a child of this node by
108 * its name, and return its contents as some type or other.
110 * If, for example, this object has been created with
111 * a node named "Fred", we might have the following XML:
117 * string_child ("Jim") would return "42"
118 * number_child<int64_t> ("Jim") would return 42.
121 * The methods not marked "optional" will throw an exception
122 * if the child node is not present. The "optional" methods
123 * will return an empty boost::optional<> in that case.
125 * All methods will also throw an exception if there is more
126 * than one of the specified child node.
129 std::string string_child (std::string c) const;
130 boost::optional<std::string> optional_string_child (std::string) const;
132 bool bool_child (std::string) const;
133 boost::optional<bool> optional_bool_child (std::string) const;
136 T number_child (std::string c) const
138 std::string s = string_child (c);
139 boost::erase_all (s, " ");
140 return raw_convert<T> (s);
144 boost::optional<T> optional_number_child (std::string c) const
146 boost::optional<std::string> s = optional_string_child (c);
148 return boost::optional<T> ();
151 std::string t = s.get ();
152 boost::erase_all (t, " ");
153 return raw_convert<T> (t);
156 /** This will mark a child as to be ignored when calling done() */
157 void ignore_child (std::string) const;
159 /** Check whether all children of this Node have been looked up
160 * or passed to ignore_child(). If not, an exception is thrown.
164 /* These methods look for an attribute of this node, in the
165 * same way as the child methods do.
168 std::string string_attribute (std::string) const;
169 boost::optional<std::string> optional_string_attribute (std::string) const;
171 bool bool_attribute (std::string) const;
172 boost::optional<bool> optional_bool_attribute (std::string) const;
175 T number_attribute (std::string c) const
177 std::string s = string_attribute (c);
178 boost::erase_all (s, " ");
179 return raw_convert<T> (s);
183 boost::optional<T> optional_number_attribute (std::string c) const
185 boost::optional<std::string> s = optional_string_attribute (c);
187 return boost::optional<T> ();
190 std::string t = s.get ();
191 boost::erase_all (t, " ");
192 return raw_convert<T> (t);
195 /** @return The text content of this node (excluding comments or CDATA) */
196 std::string content () const;
198 /** @return namespace URI of this node */
199 std::string namespace_uri () const;
201 /** @return namespace prefix of this node */
202 std::string namespace_prefix () const;
204 boost::shared_ptr<Node> node_child (std::string) const;
205 boost::shared_ptr<Node> optional_node_child (std::string) const;
207 std::list<boost::shared_ptr<Node> > node_children () const;
208 std::list<boost::shared_ptr<Node> > node_children (std::string) const;
210 xmlpp::Node* node () const {
218 mutable std::list<std::string> _taken;
221 typedef boost::shared_ptr<cxml::Node> NodePtr;
222 typedef boost::shared_ptr<const cxml::Node> ConstNodePtr;
224 class Document : public Node
228 Document (std::string root_name);
229 Document (std::string root_name, boost::filesystem::path);
231 virtual ~Document ();
233 void read_file (boost::filesystem::path);
234 void read_string (std::string);
236 std::string root_name () const {
241 void take_root_node ();
243 xmlpp::DomParser* _parser;
244 std::string _root_name;