glemon-0.x: xml.h@9cab23d9b124

     1 /* -*- C++ -*- */

     3 #include <iostream>

     4 #include <string>

     5 #include <vector>

     6 #include <list>

     7 #include <map>

     8 #include <lemon/xy.h>

    10 class XmlWriter

    11 {

    12   std::ostream& os;

    13   int level;

    15 protected:

    16   void indent(int level) {

    17     os << std::endl;

    18     for(int i=0;i<level;i++) os << ' ';

    19   }

    20   void tag(const std::string &_tag) {

    21     os << '<' << _tag << '>';

    22   }

    23   void etag(const std::string &_tag) {

    24     os << "</" << _tag << '>';

    25   }

    26   void itag(const std::string &_tag) { indent();tag(_tag); }

    27   void ietag(const std::string &_tag) { indent();etag(_tag); }

    29   void beginTag(const std::string &_tag) {

    30     itag(_tag);

    31     level++;

    32   }

    33   void endTag(const std::string &_tag) {

    34     level--;

    35     ietag(_tag);

    36   }

    38 public:

    40   void indent()

    41   {

    42     if(level>=0) indent(level);

    43     else level=0;

    44   }

    46   ///\e

    48   ///\e

    49   ///

    50   class ContTag

    51   {

    52     XmlWriter &ix;

    53     const std::string _tag;

    54   public:

    55   ///\e

    57   ///\e

    58   ///

    59     ContTag(XmlWriter &_ix,const std::string &_t) :

    60       ix(_ix), _tag(_t)

    61     {

    62       ix.tag(_tag);

    63     }

    64     ~ContTag() { ix.etag(_tag);}

    65   };

    67   class LineTag

    68   {

    69     XmlWriter &ix;

    70     const std::string _tag;

    71   public:

    72     ///\e

    74     ///\e

    75     ///

    76     LineTag(XmlWriter &_ix,const std::string &_t) :

    77       ix(_ix), _tag(_t)

    78     {

    79       ix.itag(_tag);

    80     }

    81     ~LineTag() { ix.etag(_tag);}

    82   };

    84   ///\e

    86   ///\e

    87   ///

    88   class Tag

    89   {

    90     XmlWriter &ix;

    91     const std::string _tag;

    92   public:

    93     ///\e

    95     ///\e

    96     ///

    97     Tag(XmlWriter &_ix,const std::string &_t) :

    98       ix(_ix), _tag(_t)

    99     {

   100       ix.beginTag(_tag);

   101     }

   102     ~Tag() {

   103       ix.endTag(_tag);

   104     }

   105   };

   107   ///\e

   109   ///\e

   110   ///

   111   XmlWriter(std::ostream& _os) : os(_os),level(-1) {}

   112   ~XmlWriter() { os<< std::endl; }

   114   XmlWriter &operator()(int v)

   115   {

   116     if(!(os << v)) throw (std::ios::failure ("data format error"));

   117     return *this;

   118   }

   119   XmlWriter &operator()(const std::string &_tag,int v)

   120   {

   121     LineTag t(*this,_tag);

   122     if(!(os << v)) throw (std::ios::failure ("data format error"));

   123     return *this;

   124   }

   125   XmlWriter &operator()(const std::string &_tag,double v)

   126   {

   127     LineTag t(*this,_tag);

   128     if(os << v) throw (std::ios::failure ("data format error"));

   129     return *this;

   130   }

   131   XmlWriter &operator()(double v)

   132   {

   133     os << v;

   134     return *this;

   135   }

   136   XmlWriter &operator()(const std::string &v)

   137   {

   138     for(std::string::const_iterator i=v.begin();i!=v.end();++i)

   139       switch(*i) {

   140       case '\\':

   141 	os << "\\\\";

   142 	break;

   143       case '<':

   144 	os << "\\<";

   145 	break;

   146       case '&':

   147 	os << "\\&";

   148 	break;

   149       case '\n':

   150 	os << "\\n";

   151 	break;

   152       default:

   153 	os<<*i;

   154 	break;

   155       }

   156     return *this;

   157   }

   158   XmlWriter &operator()(const std::string &_tag,const std::string &v)

   159   {

   160     LineTag t(*this,_tag);

   161     (*this)(v);

   162     return *this;

   163   }

   164   ///\e

   166   ///\e

   167   ///

   168   template<class V>

   169   XmlWriter &operator()(const std::string &_tag,const V &v)

   170   {

   171     Tag t(*this,_tag);

   172     out(*this,v);

   173     return *this;

   174   }

   175   ///\e

   177   ///\e

   178   ///

   179   template<class V>

   180   XmlWriter &operator()(const V &v)

   181   {

   182     out(*this,v);

   183     return *this;

   184   }

   185 };

   187 //////////////////////////////////////////////////////////////////////

   189 class XmlReader

   190 {

   191   std::istream& is;

   193   std::string next_tag;

   194   void skipWhiteSpaces()

   195   {

   196     char c;

   197     while (is.get(c) && std::isspace(c,is.getloc()));

   198     is.unget();

   199   }

   200 protected:

   201   ///\e

   203   ///\e

   204   ///

   205   void useTag() {next_tag.clear();}

   207   void useTag(const std::string &_tag) {

   208     if(nextTag()==_tag) useTag();

   209     else throw (std::ios::failure ("data format error"));

   210   }

   211 public:

   212   ///\e

   214   ///\e

   215   ///

   216   const std::string &nextTag()

   217   {

   218     if(next_tag.empty()) {

   219       char c;

   220       skipWhiteSpaces();

   221       if(!is.get(c) || c!='<')

   222 	throw (std::ios::failure ("data format error"));

   223       next_tag.clear();

   224       while (is.get(c) && c!='>') next_tag.push_back(c);

   225       if(c!='>')

   226 	throw (std::ios::failure ("data format error"));

   227     }

   228     return next_tag;

   229   }

   231   ///\e

   233   ///\e

   234   ///

   235   class Tag

   236   {

   237     XmlReader &ix;

   238     const std::string tag;

   239   public:

   240     ///\e

   242     ///\e

   243     ///

   244     Tag(XmlReader &_ix,const std::string &_tag) :

   245       ix(_ix), tag(_tag)

   246     {

   247       ix.useTag(_tag);

   248     }

   249     ~Tag() {

   250       if(!std::uncaught_exception())

   251 	ix.useTag('/'+tag);

   252     }

   253   };

   255   ///\e

   257   ///\e

   258   ///

   259   XmlReader(std::istream& _is) : is(_is) {}

   261   int operator()(const std::string &tag,int &v)

   262   {

   263     Tag t(*this,tag);

   264     if(!(is >> v)) throw (std::ios::failure ("data format error"));

   265     return v;

   266   }

   267   double operator()(const std::string &tag,double &v)

   268   {

   269     Tag t(*this,tag);

   270     if(!(is >> v)) throw (std::ios::failure ("data format error"));

   271     return v;

   272   }

   273   std::string &operator()(const std::string &tag,std::string &v)

   274   {

   275     Tag t(*this,tag);

   276     v.clear();

   277     char c;

   278     while (is.get(c) && c!='<')

   279       if(c=='\\')

   280 	if(!is.get(c)) throw (std::ios::failure ("data format error"));

   281 	else switch(c) {

   282 	case 'n':

   283 	  v.push_back('\n');

   284 	  break;

   285 	default:

   286 	  v.push_back(c);

   287 	  break;

   288 	}

   289       else v.push_back(c);

   290     if(c!='<')

   291 	throw (std::ios::failure ("data format error"));

   292     is.unget();

   293     return v;

   294   }

   295   ///\e

   297   ///\e

   298   ///

   299   template<class V>

   300   V &operator()(const std::string &tag,V &v)

   301   {

   302     Tag t(*this,tag);

   303     in(*this,v);

   304     return v;

   305   }

   306   ///\e

   308   ///\e

   309   ///

   310   template<class V>

   311   V &operator()(V &v)

   312   {

   313     in(*this,v);

   314     return v;

   315   }

   316   ///\e

   318   ///\e

   319   ///

   320   template<class V>

   321   V load(const std::string &tag)

   322   {

   323     Tag t(*this,tag);

   324     V v;

   325     (*this)(tag,v);

   326     return v;

   327   }

   328 };

   330 //////////////////////////////////////////////////////////////////////

   332 template<class A,class B>

   333 void out(XmlWriter &i,const std::pair<A,B> &v)

   334 {

   335   i("first",v.first);

   336   i("second",v.second);

   337 }

   339 template<class A,class B>

   340 void in(XmlReader &i,std::pair<A,B> &v)

   341 {

   342   i("first",v.first);

   343   i("second",v.second);

   344 }

   346 //////////////////////////////

   348 template<class T>

   349 void out(XmlWriter &i,const std::list<T> &v)

   350 {

   351   for(typename std::list<T>::const_iterator it=v.begin();

   352       it!=v.end();++it) i("item",*it);

   353 }

   355 template<class T>

   356 void in(XmlReader &i,std::list<T> &v)

   357 {

   358   while(i.nextTag()=="item")

   359     {

   360       v.push_back(T());

   361       i("item",v.back());

   362     }

   363 }

   365 //////////////////////////////

   367 template<class T>

   368 void out(XmlWriter &i,const std::vector<T> &v)

   369 {

   370   for(typename std::vector<T>::const_iterator it=v.begin();

   371       it!=v.end();++it) i("item",*it);

   372 }

   374 template<class T>

   375 void in(XmlReader &i,std::vector<T> &v)

   376 {

   377   while(i.nextTag()=="item")

   378     {

   379       v.push_back(T());

   380       i("item",v.back());

   381     }

   382 }

   384 //////////////////////////////

   386 template<class K,class V>

   387 void out(XmlWriter &i,const std::map<K,V> &v)

   388 {

   389   for(typename std::map<K,V>::const_iterator it=v.begin();

   390       it!=v.end();++it) i("item",*it);

   391 }

   393 template<class K,class V>

   394 void in(XmlReader &i,std::map<K,V> &v)

   395 {

   396   while(i.nextTag()=="item")

   397     {

   398       typename std::map<K,V>::value_type it;

   399       i("item",it);

   400       v.insert(it);

   401     }

   402 }

   404 //////////////////////////////

   406 template<class T>

   407 void out(XmlWriter &i,const lemon::xy<T> &v)

   408 {

   409 //   i("x",v.x);

   410 //   i("y",v.y);

   411   { XmlWriter::LineTag t(i,"x"); i(v.x); }

   412   { XmlWriter::ContTag t(i,"y"); i(v.y); }

   413 }

   415 template<class T>

   416 void in(XmlReader &i,lemon::xy<T> &v)

   417 {

   418   i("x",v.x);

   419   i("y",v.y);

   420 }

   422 //////////////////////////////

   424 template<class T>

   425 void out(XmlWriter &i,const lemon::BoundingBox<T> &v)

   426 {

   427   if(!v.empty()) {

   428     i("point",v.bottomLeft());

   429     if(v.bottomLeft()!=v.topRight()) i("point",v.topRight());

   430   }

   431 }

   433 template<class T>

   434 void in(XmlReader &i,lemon::BoundingBox<T> &v)

   435 {

   436   v.clear();

   437   while(i.nextTag()=="point") {

   438     lemon::xy<T> co;

   439     i("point",co);

   440     v+=co;

   441   }

   442 }

author	hegyi
	Mon, 25 Jul 2005 11:17:23 +0000
branch	gui
changeset 38	9cab23d9b124
child 39	959c499e3b65
permissions	-rw-r--r--