Emeric Vigier | 2f62582 | 2012-08-06 11:09:52 -0400 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * D-Bus++ - C++ bindings for D-Bus |
| 4 | * |
| 5 | * Copyright (C) 2005-2007 Paolo Durante <shackan@gmail.com> |
| 6 | * |
| 7 | * |
| 8 | * This library is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This library is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with this library; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | |
| 25 | #include "xml.h" |
| 26 | |
| 27 | #include <expat.h> |
| 28 | |
| 29 | std::istream &operator >> (std::istream &in, DBus::Xml::Document &doc) |
| 30 | { |
| 31 | std::stringbuf xmlbuf; |
| 32 | in.get(xmlbuf, '\0'); |
| 33 | doc.from_xml(xmlbuf.str()); |
| 34 | |
| 35 | return in; |
| 36 | } |
| 37 | |
| 38 | std::ostream &operator << (std::ostream &out, const DBus::Xml::Document &doc) |
| 39 | { |
| 40 | return out << doc.to_xml(); |
| 41 | } |
| 42 | |
| 43 | using namespace DBus; |
| 44 | using namespace DBus::Xml; |
| 45 | |
| 46 | Error::Error(const char *error, int line, int column) |
| 47 | { |
| 48 | std::ostringstream estream; |
| 49 | |
| 50 | estream << "line " << line << ", column " << column << ": " << error; |
| 51 | |
| 52 | _error = estream.str(); |
| 53 | } |
| 54 | |
| 55 | Node::Node(const char *n, const char **a) |
| 56 | : name(n) |
| 57 | { |
| 58 | if (a) |
| 59 | for (int i = 0; a[i]; i += 2) |
| 60 | { |
| 61 | _attrs[a[i]] = a[i + 1]; |
| 62 | |
| 63 | //debug_log("xml:\t%s = %s", a[i], a[i+1]); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | Nodes Nodes::operator[](const std::string &key) |
| 68 | { |
| 69 | Nodes result; |
| 70 | |
| 71 | for (iterator i = begin(); i != end(); ++i) |
| 72 | { |
| 73 | Nodes part = (**i)[key]; |
| 74 | |
| 75 | result.insert(result.end(), part.begin(), part.end()); |
| 76 | } |
| 77 | return result; |
| 78 | } |
| 79 | |
| 80 | Nodes Nodes::select(const std::string &attr, const std::string &value) |
| 81 | { |
| 82 | Nodes result; |
| 83 | |
| 84 | for (iterator i = begin(); i != end(); ++i) |
| 85 | { |
| 86 | if ((*i)->get(attr) == value) |
| 87 | result.insert(result.end(), *i); |
| 88 | } |
| 89 | return result; |
| 90 | } |
| 91 | |
| 92 | Nodes Node::operator[](const std::string &key) |
| 93 | { |
| 94 | Nodes result; |
| 95 | |
| 96 | if (key.length() == 0) return result; |
| 97 | |
| 98 | for (Children::iterator i = children.begin(); i != children.end(); ++i) |
| 99 | { |
| 100 | if (i->name == key) |
| 101 | result.push_back(&(*i)); |
| 102 | } |
| 103 | return result; |
| 104 | } |
| 105 | |
| 106 | std::string Node::get(const std::string &attribute) |
| 107 | { |
| 108 | if (_attrs.find(attribute) != _attrs.end()) |
| 109 | return _attrs[attribute]; |
| 110 | else |
| 111 | return ""; |
| 112 | } |
| 113 | |
| 114 | void Node::set(const std::string &attribute, std::string value) |
| 115 | { |
| 116 | if (value.length()) |
| 117 | _attrs[attribute] = value; |
| 118 | else |
| 119 | _attrs.erase(value); |
| 120 | } |
| 121 | |
| 122 | std::string Node::to_xml() const |
| 123 | { |
| 124 | std::string xml; |
| 125 | int depth = 0; |
| 126 | |
| 127 | _raw_xml(xml, depth); |
| 128 | |
| 129 | return xml; |
| 130 | } |
| 131 | |
| 132 | void Node::_raw_xml(std::string &xml, int &depth) const |
| 133 | { |
| 134 | xml.append(depth * 2, ' '); |
| 135 | xml.append("<" + name); |
| 136 | |
| 137 | for (Attributes::const_iterator i = _attrs.begin(); i != _attrs.end(); ++i) |
| 138 | { |
| 139 | xml.append(" " + i->first + "=\"" + i->second + "\""); |
| 140 | } |
| 141 | |
| 142 | if (cdata.length() == 0 && children.size() == 0) |
| 143 | { |
| 144 | xml.append("/>\n"); |
| 145 | } |
| 146 | else |
| 147 | { |
| 148 | xml.append(">"); |
| 149 | |
| 150 | if (cdata.length()) |
| 151 | { |
| 152 | xml.append(cdata); |
| 153 | } |
| 154 | |
| 155 | if (children.size()) |
| 156 | { |
| 157 | xml.append("\n"); |
| 158 | depth++; |
| 159 | |
| 160 | for (Children::const_iterator i = children.begin(); i != children.end(); ++i) |
| 161 | { |
| 162 | i->_raw_xml(xml, depth); |
| 163 | } |
| 164 | |
| 165 | depth--; |
| 166 | xml.append(depth * 2, ' '); |
| 167 | } |
| 168 | xml.append("</" + name + ">\n"); |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | Document::Document() |
| 173 | : root(0), _depth(0) |
| 174 | { |
| 175 | } |
| 176 | |
| 177 | Document::Document(const std::string &xml) |
| 178 | : root(0), _depth(0) |
| 179 | { |
| 180 | from_xml(xml); |
| 181 | } |
| 182 | |
| 183 | Document::~Document() |
| 184 | { |
| 185 | delete root; |
| 186 | } |
| 187 | |
| 188 | struct Document::Expat |
| 189 | { |
| 190 | static void start_doctype_decl_handler( |
| 191 | void *data, const XML_Char *name, const XML_Char *sysid, const XML_Char *pubid, int has_internal_subset |
| 192 | ); |
| 193 | static void end_doctype_decl_handler(void *data); |
| 194 | static void start_element_handler(void *data, const XML_Char *name, const XML_Char **atts); |
| 195 | static void character_data_handler(void *data, const XML_Char *chars, int len); |
| 196 | static void end_element_handler(void *data, const XML_Char *name); |
| 197 | }; |
| 198 | |
| 199 | void Document::from_xml(const std::string &xml) |
| 200 | { |
| 201 | _depth = 0; |
| 202 | delete root; |
| 203 | root = 0; |
| 204 | |
| 205 | XML_Parser parser = XML_ParserCreate("UTF-8"); |
| 206 | |
| 207 | XML_SetUserData(parser, this); |
| 208 | |
| 209 | XML_SetDoctypeDeclHandler( |
| 210 | parser, |
| 211 | Document::Expat::start_doctype_decl_handler, |
| 212 | Document::Expat::end_doctype_decl_handler |
| 213 | ); |
| 214 | |
| 215 | XML_SetElementHandler( |
| 216 | parser, |
| 217 | Document::Expat::start_element_handler, |
| 218 | Document::Expat::end_element_handler |
| 219 | ); |
| 220 | |
| 221 | XML_SetCharacterDataHandler( |
| 222 | parser, |
| 223 | Document::Expat::character_data_handler |
| 224 | ); |
| 225 | |
| 226 | XML_Status status = XML_Parse(parser, xml.c_str(), xml.length(), true); |
| 227 | |
| 228 | if (status == XML_STATUS_ERROR) |
| 229 | { |
| 230 | const char *error = XML_ErrorString(XML_GetErrorCode(parser)); |
| 231 | int line = XML_GetCurrentLineNumber(parser); |
| 232 | int column = XML_GetCurrentColumnNumber(parser); |
| 233 | |
| 234 | XML_ParserFree(parser); |
| 235 | |
| 236 | throw Error(error, line, column); |
| 237 | } |
| 238 | else |
| 239 | { |
| 240 | XML_ParserFree(parser); |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | std::string Document::to_xml() const |
| 245 | { |
| 246 | return root->to_xml(); |
| 247 | } |
| 248 | |
| 249 | void Document::Expat::start_doctype_decl_handler( |
| 250 | void *data, const XML_Char *name, const XML_Char *sysid, const XML_Char *pubid, int has_internal_subset |
| 251 | ) |
| 252 | { |
| 253 | } |
| 254 | |
| 255 | void Document::Expat::end_doctype_decl_handler(void *data) |
| 256 | { |
| 257 | } |
| 258 | |
| 259 | void Document::Expat::start_element_handler(void *data, const XML_Char *name, const XML_Char **atts) |
| 260 | { |
| 261 | Document *doc = (Document *)data; |
| 262 | |
| 263 | //debug_log("xml:%d -> %s", doc->_depth, name); |
| 264 | |
| 265 | if (!doc->root) |
| 266 | { |
| 267 | doc->root = new Node(name, atts); |
| 268 | } |
| 269 | else |
| 270 | { |
| 271 | Node::Children *cld = &(doc->root->children); |
| 272 | |
| 273 | for (int i = 1; i < doc->_depth; ++i) |
| 274 | { |
| 275 | cld = &(cld->back().children); |
| 276 | } |
| 277 | cld->push_back(Node(name, atts)); |
| 278 | |
| 279 | //std::cerr << doc->to_xml() << std::endl; |
| 280 | } |
| 281 | doc->_depth++; |
| 282 | } |
| 283 | |
| 284 | void Document::Expat::character_data_handler(void *data, const XML_Char *chars, int len) |
| 285 | { |
| 286 | Document *doc = (Document *)data; |
| 287 | |
| 288 | Node *nod = doc->root; |
| 289 | |
| 290 | for (int i = 1; i < doc->_depth; ++i) |
| 291 | { |
| 292 | nod = &(nod->children.back()); |
| 293 | } |
| 294 | int x, y; |
| 295 | |
| 296 | x = 0; |
| 297 | y = len - 1; |
| 298 | |
| 299 | while (isspace(chars[y]) && y > 0) --y; |
| 300 | while (isspace(chars[x]) && x < y) ++x; |
| 301 | |
| 302 | nod->cdata = std::string(chars, x, y + 1); |
| 303 | } |
| 304 | |
| 305 | void Document::Expat::end_element_handler(void *data, const XML_Char *name) |
| 306 | { |
| 307 | Document *doc = (Document *)data; |
| 308 | |
| 309 | //debug_log("xml:%d <- %s", doc->_depth, name); |
| 310 | |
| 311 | doc->_depth--; |
| 312 | } |
| 313 | |