src/xml.cpp

   1 /***************************************
   2 ** Tsunagari Tile Engine              **
   3 ** xml.cpp                            **
   4 ** Copyright 2011-2013 PariahSoft LLC **
   5 ***************************************/
   6
   7 // **********
   8 // Permission is hereby granted, free of charge, to any person obtaining a copy
   9 // of this software and associated documentation files (the "Software"), to
  10 // deal in the Software without restriction, including without limitation the
  11 // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  12 // sell copies of the Software, and to permit persons to whom the Software is
  13 // furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  24 // IN THE SOFTWARE.
  25 // **********
  26
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include "log.h"
  31 #include "string.h"
  32 #include "xml.h"
  33
  34 #ifdef _WIN32
  35         #include "os-windows.h"
  36 #endif
  37
  38 XMLNode::XMLNode()
  39 {
  40 }
  41
  42 XMLNode::XMLNode(XMLDoc* doc, xmlNode* node)
  43         : doc(doc), node(node)
  44 {
  45 }
  46
  47 XMLNode XMLNode::childrenNode() const
  48 {
  49         return XMLNode(doc, node->xmlChildrenNode);
  50 }
  51
  52 XMLNode XMLNode::next() const
  53 {
  54         return XMLNode(doc, node->next);
  55 }
  56
  57 bool XMLNode::is(const char* name) const
  58 {
  59         return !xmlStrncmp(node->name, BAD_CAST(name), (int)strlen(name)+1);
  60 }
  61
  62 std::string XMLNode::content() const
  63 {
  64         xmlChar* content = xmlNodeGetContent(node);
  65         std::string s = content ? (const char*)content : "";
  66         xmlFree(content);
  67         return s;
  68 }
  69
  70 bool XMLNode::intContent(int* i) const
  71 {
  72         std::string s = content();
  73         if (!isInteger(s)) {
  74                 Log::err(doc->path(), "expected integer");
  75                 return false;
  76         }
  77         *i = atoi(s.c_str());
  78         return true;
  79 }
  80
  81 bool XMLNode::doubleContent(double *d) const
  82 {
  83         std::string s = content();
  84         if (!isDecimal(s)) {
  85                 Log::err(doc->path(), "expected decimal");
  86                 return false;
  87         }
  88         *d = atof(s.c_str());
  89         return true;
  90 }
  91
  92 bool XMLNode::hasAttr(const std::string& name) const
  93 {
  94         return xmlHasProp(node, BAD_CAST(name.c_str()));
  95 }
  96
  97 std::string XMLNode::attr(const std::string& name) const
  98 {
  99         xmlChar* content = xmlGetProp(node, BAD_CAST(name.c_str()));
 100         std::string s = content ? (const char*)content : "";
 101         xmlFree(content);
 102         return s;
 103 }
 104
 105 bool XMLNode::intAttr(const std::string& name, int* i) const
 106 {
 107         std::string s = attr(name);
 108         if (!isInteger(s)) {
 109                 Log::err(doc->path(), "expected integer");
 110                 return false;
 111         }
 112         *i = atoi(s.c_str());
 113         return true;
 114 }
 115
 116 bool XMLNode::doubleAttr(const std::string& name, double* d) const
 117 {
 118         std::string s = attr(name);
 119         if (!isDecimal(s)) {
 120                 Log::err(doc->path(), "expected decimal");
 121                 return false;
 122         }
 123         *d = atof(s.c_str());
 124         return true;
 125 }
 126
 127 XMLNode::operator bool() const
 128 {
 129         return node != NULL;
 130 }
 131
 132
 133 static void xmlErrorCb(void* pstrFilename, const char* msg, ...)
 134 {
 135
 136         const std::string* filename = (const std::string*)pstrFilename;
 137         char buf[512];
 138         va_list ap;
 139
 140         va_start(ap, msg);
 141         snprintf(buf, sizeof(buf)-1, msg, va_arg(ap, char*));
 142         Log::err(*filename, buf);
 143         va_end(ap);
 144 }
 145
 146 XMLDoc::XMLDoc()
 147 {
 148 }
 149
 150 bool XMLDoc::init(const std::string& path,
 151                   const std::string& data,
 152                   xmlDtd* dtd)
 153 {
 154         this->path_ = path;
 155
 156         xmlParserCtxt* pc = xmlNewParserCtxt();
 157         pc->vctxt.userData = (void*)&path;
 158         pc->vctxt.error = xmlErrorCb;
 159
 160         // Parse the XML. Hand over our error callback fn.
 161         doc.reset(xmlCtxtReadMemory(pc, data.c_str(),
 162                 (int)data.size(), NULL, NULL,
 163                 XML_PARSE_NOBLANKS | XML_PARSE_NONET), xmlFreeDoc);
 164         xmlFreeParserCtxt(pc);
 165         if (!doc) {
 166                 Log::err(path, "could not parse file");
 167                 return false;
 168         }
 169
 170         // Assert the document is sane.
 171         xmlValidCtxt* vc = xmlNewValidCtxt();
 172         int valid = xmlValidateDtd(vc, doc.get(), dtd);
 173         xmlFreeValidCtxt(vc);
 174
 175         if (!valid) {
 176                 doc.reset();
 177                 Log::err(path, "XML document does not follow DTD");
 178                 return false;
 179         }
 180
 181         return true;
 182 }
 183
 184 XMLNode XMLDoc::root()
 185 {
 186         return XMLNode(this, xmlDocGetRootElement(doc.get()));
 187 }
 188
 189 xmlNode* XMLDoc::temporaryGetRoot() const
 190 {
 191         return xmlDocGetRootElement(doc.get());
 192 }
 193
 194 const std::string& XMLDoc::path() const
 195 {
 196         return path_;
 197 }
 198
 199 XMLDoc::operator bool() const
 200 {
 201         return doc.get();
 202 }
 203
 204 bool XMLDoc::unique() const
 205 {
 206         return doc.unique();
 207 }
 208
 209 long XMLDoc::use_count() const
 210 {
 211         return doc.use_count();
 212 }
 213