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);
95 raw_convert (std::string v);
97 /** @brief A wrapper for a xmlpp::Node which simplifies parsing */
103 /** Construct a Node from an xmlpp::Node. This class will
104 * not destroy the xmlpp::Node.
105 * @param node xmlpp::Node.
107 Node (xmlpp::Node* node);
109 std::string name () const;
111 /* A set of methods which look up a child of this node by
112 * its name, and return its contents as some type or other.
114 * If, for example, this object has been created with
115 * a node named "Fred", we might have the following XML:
121 * string_child ("Jim") would return "42"
122 * number_child<int64_t> ("Jim") would return 42.
125 * The methods not marked "optional" will throw an exception
126 * if the child node is not present. The "optional" methods
127 * will return an empty boost::optional<> in that case.
129 * All methods will also throw an exception if there is more
130 * than one of the specified child node.
133 std::string string_child (std::string c) const;
134 boost::optional<std::string> optional_string_child (std::string) const;
136 bool bool_child (std::string) const;
137 boost::optional<bool> optional_bool_child (std::string) const;
140 T number_child (std::string c) const
142 std::string s = string_child (c);
143 boost::erase_all (s, " ");
144 return raw_convert<T> (s);
148 boost::optional<T> optional_number_child (std::string c) const
150 boost::optional<std::string> s = optional_string_child (c);
152 return boost::optional<T> ();
155 std::string t = s.get ();
156 boost::erase_all (t, " ");
157 return raw_convert<T> (t);
160 /** This will mark a child as to be ignored when calling done() */
161 void ignore_child (std::string) const;
163 /** Check whether all children of this Node have been looked up
164 * or passed to ignore_child(). If not, an exception is thrown.
168 /* These methods look for an attribute of this node, in the
169 * same way as the child methods do.
172 std::string string_attribute (std::string) const;
173 boost::optional<std::string> optional_string_attribute (std::string) const;
175 bool bool_attribute (std::string) const;
176 boost::optional<bool> optional_bool_attribute (std::string) const;
179 T number_attribute (std::string c) const
181 std::string s = string_attribute (c);
182 boost::erase_all (s, " ");
183 return raw_convert<T> (s);
187 boost::optional<T> optional_number_attribute (std::string c) const
189 boost::optional<std::string> s = optional_string_attribute (c);
191 return boost::optional<T> ();
194 std::string t = s.get ();
195 boost::erase_all (t, " ");
196 return raw_convert<T> (t);
199 /** @return The text content of this node (excluding comments or CDATA) */
200 std::string content () const;
202 /** @return namespace URI of this node */
203 std::string namespace_uri () const;
205 /** @return namespace prefix of this node */
206 std::string namespace_prefix () const;
208 boost::shared_ptr<Node> node_child (std::string) const;
209 boost::shared_ptr<Node> optional_node_child (std::string) const;
211 std::list<boost::shared_ptr<Node> > node_children () const;
212 std::list<boost::shared_ptr<Node> > node_children (std::string) const;
214 xmlpp::Node* node () const {
222 mutable std::list<std::string> _taken;
225 typedef boost::shared_ptr<cxml::Node> NodePtr;
226 typedef boost::shared_ptr<const cxml::Node> ConstNodePtr;
228 class Document : public Node
232 Document (std::string root_name);
233 Document (std::string root_name, boost::filesystem::path);
235 virtual ~Document ();
237 void read_file (boost::filesystem::path);
238 void read_string (std::string);
240 std::string root_name () const {
245 void take_root_node ();
247 xmlpp::DomParser* _parser;
248 std::string _root_name;