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e50cc1d6 JT |
1 | #include <libxml++/libxml++.h> |
2 | #include <cassert> | |
3 | #include <iostream> | |
4 | ||
5 | void print_indentation(unsigned int indentation) | |
6 | { | |
7 | for(unsigned int i = 0; i < indentation; ++i) | |
8 | std::cout << " "; | |
9 | } | |
10 | ||
11 | ||
12 | ||
13 | //! get child element by id | |
14 | /*! | |
15 | \return pointer to element having id or null on error | |
16 | \todo find libxmlpp pendant | |
17 | */ | |
18 | const xmlpp::Element* get_element_by_id(const xmlpp::Element* element, const std::string &id) | |
19 | { | |
20 | const xmlpp::Attribute* cid = element->get_attribute("id"); | |
21 | if ( cid && ( cid->get_value() == id)) return element; | |
22 | ||
23 | //Recurse through child nodes: | |
24 | xmlpp::Node::NodeList list = element->get_children(); | |
25 | for(xmlpp::Node::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter) | |
26 | { | |
27 | const xmlpp::Element* element = dynamic_cast<const xmlpp::Element*>(*iter); | |
28 | if (element) { | |
29 | const xmlpp::Element* match = get_element_by_id(element, id); | |
30 | if (match) return match; | |
31 | } | |
32 | } | |
33 | return NULL; | |
34 | } | |
35 | ||
36 | //! get namespace by id | |
37 | /*! | |
38 | \return namespace name or empty string on error | |
39 | */ | |
40 | std::string get_namespace(const xmlpp::Element* root, const std::string &id) | |
41 | { | |
42 | std::string error; | |
43 | const xmlpp::Element* element(get_element_by_id(root, id)); | |
44 | if ((!element)||(!element->get_attribute("name"))) return error; | |
45 | return element->get_attribute("name")->get_value(); | |
46 | } | |
47 | ||
48 | //! get type by id | |
49 | /*! | |
50 | \return type name or empty string on error | |
51 | */ | |
52 | std::string get_type(const xmlpp::Element* root, const std::string &id) | |
53 | { | |
54 | std::string error; | |
55 | const xmlpp::Element* element(get_element_by_id(root, id)); | |
56 | if (!element) return error; | |
57 | ||
58 | // TODO: not yet complete | |
59 | // if we recurse - when do we stop? | |
60 | // if it is a typedef? yes? (hmm if the typedef is in the file parsed this will not work) | |
61 | std::string tag(element->get_name()); | |
62 | if (tag=="ReferenceType") { | |
63 | assert(element->get_attribute("type")); | |
64 | std::string ret(get_type(root, element->get_attribute("type")->get_value())); | |
65 | if (ret==error) return error; | |
66 | return ret+"&"; | |
67 | }else if (tag=="CvQualifiedType") { | |
68 | assert(element->get_attribute("type")); | |
69 | std::string ret(get_type(root, element->get_attribute("type")->get_value())); | |
70 | if (ret==error) return error; | |
71 | return std::string("const ")+ret; | |
72 | } | |
73 | ||
74 | assert(element->get_attribute("name")); | |
75 | assert(element->get_attribute("context")); | |
76 | return get_namespace(root, element->get_attribute("context")->get_value())+"::"+element->get_attribute("name")->get_value(); | |
77 | } | |
78 | ||
79 | void parse_function(const xmlpp::Element* root, const xmlpp::Node* node, unsigned int indentation = 0) { | |
80 | const xmlpp::Element* element = dynamic_cast<const xmlpp::Element*>(node); | |
81 | if (!element) return; | |
82 | ||
83 | const xmlpp::Attribute* attributes = element->get_attribute("attributes"); | |
84 | const xmlpp::Attribute* name = element->get_attribute("name"); | |
85 | const xmlpp::Attribute* returns = element->get_attribute("returns"); | |
86 | if ((!attributes)||(!name)||(!returns)) return; | |
87 | ||
88 | // check wether the function is marked (TODO: improve) | |
89 | if (attributes->get_value().find("gccxml(libt2n")==std::string::npos) return; | |
90 | ||
91 | // TODO: extract command group | |
92 | // something like: sed 's,gccxml(libt2n-\([a-z]*}),\1,' | |
93 | ||
94 | // we need the return type | |
95 | std::string ret_type(get_type(root, returns->get_value())); | |
96 | ||
97 | // and the argument types | |
98 | typedef std::map<std::string, std::string> Args; | |
99 | Args args; | |
100 | ||
101 | xmlpp::Node::NodeList list = node->get_children("Argument"); | |
102 | for(xmlpp::Node::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter) | |
103 | { | |
104 | const xmlpp::Element* arg = dynamic_cast<const xmlpp::Element*>(*iter); | |
105 | if ( arg ) { | |
106 | assert(arg->get_name() == "Argument"); | |
107 | assert(arg->get_attribute("name")); | |
108 | assert(arg->get_attribute("type")); | |
109 | assert(args.find(arg->get_attribute("name")->get_value())==args.end()); | |
110 | args[arg->get_attribute("name")->get_value()]=get_type(root, arg->get_attribute("type")->get_value()); | |
111 | } | |
112 | } | |
113 | ||
114 | std::cerr << "Found marked Function: " << ret_type << " " << name->get_value() << "("; | |
115 | for (Args::const_iterator it=args.begin();it!=args.end();++it) { | |
116 | if (it!=args.begin()) std::cerr << ", "; | |
117 | std::cerr << it->second << " " << it->first; | |
118 | } | |
119 | std::cerr << ");" << std::endl; | |
120 | } | |
121 | ||
122 | void print_node(const xmlpp::Element* root, const xmlpp::Node* node = NULL, unsigned int indentation = 0) | |
123 | { | |
124 | if (!node) node=root; | |
125 | std::cout << std::endl; //Separate nodes by an empty line. | |
126 | ||
127 | const xmlpp::ContentNode* nodeContent = dynamic_cast<const xmlpp::ContentNode*>(node); | |
128 | const xmlpp::TextNode* nodeText = dynamic_cast<const xmlpp::TextNode*>(node); | |
129 | const xmlpp::CommentNode* nodeComment = dynamic_cast<const xmlpp::CommentNode*>(node); | |
130 | ||
131 | if(nodeText && nodeText->is_white_space()) //Let's ignore the indenting - you don't always want to do this. | |
132 | return; | |
133 | ||
134 | std::string nodename = node->get_name(); | |
135 | ||
136 | if(!nodeText && !nodeComment && !nodename.empty()) //Let's not say "name: text". | |
137 | { | |
138 | print_indentation(indentation); | |
139 | // std::cout << "Node name = " << node->get_name() << std::endl; | |
140 | // std::cout << "Node name = " << nodename << std::endl; | |
141 | if (node->get_name() == "Function") { | |
142 | parse_function(root, node, indentation); | |
143 | } | |
144 | } | |
145 | else if(nodeText) //Let's say when it's text. - e.g. let's say what that white space is. | |
146 | { | |
147 | print_indentation(indentation); | |
148 | std::cout << "Text Node" << std::endl; | |
149 | } | |
150 | ||
151 | //Treat the various node types differently: | |
152 | if(nodeText) | |
153 | { | |
154 | print_indentation(indentation); | |
155 | std::cout << "text = \"" << nodeText->get_content() << "\"" << std::endl; | |
156 | } | |
157 | else if(nodeComment) | |
158 | { | |
159 | print_indentation(indentation); | |
160 | std::cout << "comment = " << nodeComment->get_content() << std::endl; | |
161 | } | |
162 | else if(nodeContent) | |
163 | { | |
164 | print_indentation(indentation); | |
165 | std::cout << "content = " << nodeContent->get_content() << std::endl; | |
166 | } | |
167 | else if(const xmlpp::Element* nodeElement = dynamic_cast<const xmlpp::Element*>(node)) | |
168 | { | |
169 | //A normal Element node: | |
170 | ||
171 | //line() works only for ElementNodes. | |
172 | print_indentation(indentation); | |
173 | std::cout << " line = " << node->get_line() << std::endl; | |
174 | ||
175 | //Print attributes: | |
176 | const xmlpp::Element::AttributeList& attributes = nodeElement->get_attributes(); | |
177 | for(xmlpp::Element::AttributeList::const_iterator iter = attributes.begin(); iter != attributes.end(); ++iter) | |
178 | { | |
179 | const xmlpp::Attribute* attribute = *iter; | |
180 | print_indentation(indentation); | |
181 | std::cout << " Attribute " << attribute->get_name() << " = " << attribute->get_value() << std::endl; | |
182 | } | |
183 | ||
184 | const xmlpp::Attribute* attribute = nodeElement->get_attribute("title"); | |
185 | if(attribute) | |
186 | { | |
187 | std::cout << "title found: =" << attribute->get_value() << std::endl; | |
188 | ||
189 | } | |
190 | } | |
191 | ||
192 | if(!nodeContent) | |
193 | { | |
194 | //Recurse through child nodes: | |
195 | xmlpp::Node::NodeList list = node->get_children(); | |
196 | for(xmlpp::Node::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter) | |
197 | { | |
198 | print_node(root, *iter, indentation + 2); //recursive | |
199 | } | |
200 | } | |
201 | } | |
202 | ||
203 | int main(int argc, char* argv[]) | |
204 | { | |
205 | std::string filepath; | |
206 | if(argc > 1 ) | |
207 | filepath = argv[1]; //Allow the user to specify a different XML file to parse. | |
208 | else | |
209 | filepath = "example.xml"; | |
210 | ||
211 | try | |
212 | { | |
213 | xmlpp::DomParser parser; | |
214 | // parser.set_validate(); | |
215 | parser.set_substitute_entities(); //We just want the text to be resolved/unescaped automatically. | |
216 | parser.parse_file(filepath); | |
217 | if(parser) | |
218 | { | |
219 | //Walk the tree: | |
220 | const xmlpp::Node* pNode = parser.get_document()->get_root_node(); //deleted by DomParser. | |
221 | const xmlpp::Element* root = dynamic_cast<const xmlpp::Element*>(pNode); | |
222 | assert(root); | |
223 | print_node(root); | |
224 | } | |
225 | } | |
226 | catch(const std::exception& ex) | |
227 | { | |
228 | std::cout << "Exception caught: " << ex.what() << std::endl; | |
229 | } | |
230 | ||
231 | return 0; | |
232 | } |