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Reference Guide
xmlreadfile.C
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1/// \file
2/// \ingroup tutorial_xml
3/// \notebook -nodraw
4/// Example to read and parse any xml file, supported by TXMLEngine class
5/// The input file, produced by xmlnewfile.C macro is used
6/// If you need full xml syntax support, use TXMLParser instead
7///
8/// \macro_output
9/// \macro_code
10///
11/// \author Sergey Linev
12
13#include "TXMLEngine.h"
14#include <stdio.h>
15
16void DisplayNode(TXMLEngine &xml, XMLNodePointer_t node, Int_t level)
17{
18 // this function display all accessible information about xml node and its children
19
20 printf("%*c node: %s\n", level, ' ', xml.GetNodeName(node));
21
22 // display namespace
23 XMLNsPointer_t ns = xml.GetNS(node);
24 if (ns != 0)
25 printf("%*c namespace: %s refer: %s\n", level + 2, ' ', xml.GetNSName(ns), xml.GetNSReference(ns));
26
27 // display attributes
28 XMLAttrPointer_t attr = xml.GetFirstAttr(node);
29 while (attr != 0) {
30 printf("%*c attr: %s value: %s\n", level + 2, ' ', xml.GetAttrName(attr), xml.GetAttrValue(attr));
31 attr = xml.GetNextAttr(attr);
32 }
33
34 // display content (if exists)
35 const char *content = xml.GetNodeContent(node);
36 if (content != 0)
37 printf("%*c cont: %s\n", level + 2, ' ', content);
38
39 // display all child nodes
40 XMLNodePointer_t child = xml.GetChild(node);
41 while (child != 0) {
42 DisplayNode(xml, child, level + 2);
43 child = xml.GetNext(child);
44 }
45}
46
47void xmlreadfile(const char* filename = "example.xml")
48{
49 // First create engine
50 TXMLEngine xml;
51
52 // Now try to parse xml file
53 // Only file with restricted xml syntax are supported
54 XMLDocPointer_t xmldoc = xml.ParseFile(filename);
55 if (!xmldoc) return;
56
57 // take access to main node
58 XMLNodePointer_t mainnode = xml.DocGetRootElement(xmldoc);
59
60 // display recursively all nodes and subnodes
61 DisplayNode(xml, mainnode, 1);
62
63 // Release memory before exit
64 xml.FreeDoc(xmldoc);
65}
int Int_t
Definition: RtypesCore.h:45
void * XMLNodePointer_t
Definition: TXMLEngine.h:17
void * XMLNsPointer_t
Definition: TXMLEngine.h:18
void * XMLDocPointer_t
Definition: TXMLEngine.h:20
void * XMLAttrPointer_t
Definition: TXMLEngine.h:19
const char * GetNSName(XMLNsPointer_t ns)
return name id of namespace
Definition: TXMLEngine.cxx:778
XMLNodePointer_t GetChild(XMLNodePointer_t xmlnode, Bool_t realnode=kTRUE)
returns first child of xmlnode
void FreeDoc(XMLDocPointer_t xmldoc)
frees allocated document data and deletes document itself
XMLNodePointer_t DocGetRootElement(XMLDocPointer_t xmldoc)
returns root node of document
XMLAttrPointer_t GetNextAttr(XMLAttrPointer_t xmlattr)
return next attribute in the list
Definition: TXMLEngine.cxx:681
const char * GetNSReference(XMLNsPointer_t ns)
return reference id of namespace
Definition: TXMLEngine.cxx:791
const char * GetNodeContent(XMLNodePointer_t xmlnode)
get contents (if any) of xmlnode
XMLNsPointer_t GetNS(XMLNodePointer_t xmlnode)
return namespace attribute (if exists)
Definition: TXMLEngine.cxx:766
const char * GetAttrName(XMLAttrPointer_t xmlattr)
return name of the attribute
Definition: TXMLEngine.cxx:692
XMLAttrPointer_t GetFirstAttr(XMLNodePointer_t xmlnode)
return first attribute in the list, namespace (if exists) will be skipped
Definition: TXMLEngine.cxx:665
const char * GetNodeName(XMLNodePointer_t xmlnode)
returns name of xmlnode
XMLDocPointer_t ParseFile(const char *filename, Int_t maxbuf=100000)
Parses content of file and tries to produce xml structures.
const char * GetAttrValue(XMLAttrPointer_t xmlattr)
return value of attribute
Definition: TXMLEngine.cxx:703
XMLNodePointer_t GetNext(XMLNodePointer_t xmlnode, Bool_t realnode=kTRUE)
return next to xmlnode node if realnode==kTRUE, any special nodes in between will be skipped
static constexpr double ns