libxml2

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Typedefs | Enumerations | Functions
xmlreader.h File Reference

the XMLReader implementation More...

## Typedefs
typedef struct _xmlTextReader | xmlTextReader
| xmlReader context
typedef void(* | xmlTextReaderErrorFunc) (void *arg, const char *msg, xmlParserSeverities severity, xmlTextReaderLocatorPtr locator)
| Signature of an error callback from a reader parser.

## Enumerations
enum | xmlParserSeverities
| How severe an error callback is when the per-reader error callback API is used.
enum | xmlTextReaderMode
| Internal state values for the reader.
enum | xmlParserProperties
| Some common options to use with xmlTextReaderSetParserProp, but it is better to use xmlParserOption and the xmlReaderNewxxx and xmlReaderForxxx APIs now.
enum | xmlReaderTypes
| Predefined constants for the different types of nodes. More...

## Functions
xmlTextReader * | xmlNewTextReader (xmlParserInputBuffer *input, const char *URI)
| Create an xmlTextReader structure fed with input.
xmlTextReader * | xmlNewTextReaderFilename (const char *URI)
| Create an xmlTextReader structure fed with the resource at URI.
void | xmlFreeTextReader (xmlTextReader *reader)
| Deallocate all the resources associated to the reader.
int | xmlTextReaderSetup (xmlTextReader *reader, xmlParserInputBuffer *input, const char *URL, const char *encoding, int options)
| Setup an XML reader with new options.
void | xmlTextReaderSetMaxAmplification (xmlTextReader *reader, unsigned maxAmpl)
| Set the maximum amplification factor.
const xmlError * | xmlTextReaderGetLastError (xmlTextReader *reader)
int | xmlTextReaderRead (xmlTextReader *reader)
| Moves the position of the current instance to the next node in the stream, exposing its properties.
xmlChar * | xmlTextReaderReadInnerXml (xmlTextReader *reader)
| Reads the contents of the current node, including child nodes and markup.
xmlChar * | xmlTextReaderReadOuterXml (xmlTextReader *reader)
| Reads the contents of the current node, including child nodes and markup.
xmlChar * | xmlTextReaderReadString (xmlTextReader *reader)
| Reads the contents of an element or a text node as a string.
int | xmlTextReaderReadAttributeValue (xmlTextReader *reader)
| Parses an attribute value into one or more Text and EntityReference nodes.
int | xmlTextReaderAttributeCount (xmlTextReader *reader)
| Provides the number of attributes of the current node.
int | xmlTextReaderDepth (xmlTextReader *reader)
| The depth of the node in the tree.
int | xmlTextReaderHasAttributes (xmlTextReader *reader)
| Whether the node has attributes.
int | xmlTextReaderHasValue (xmlTextReader *reader)
| Whether the node can have a text value.
int | xmlTextReaderIsDefault (xmlTextReader *reader)
| Whether an Attribute node was generated from the default value defined in the DTD or schema.
int | xmlTextReaderIsEmptyElement (xmlTextReader *reader)
| Check if the current node is empty.
int | xmlTextReaderNodeType (xmlTextReader *reader)
| Get the node type of the current node Reference: http://www.gnu.org/software/dotgnu/pnetlib-doc/System/Xml/XmlNodeType.html.
int | xmlTextReaderQuoteChar (xmlTextReader *reader)
| The quotation mark character used to enclose the value of an attribute.
int | xmlTextReaderReadState (xmlTextReader *reader)
| Gets the read state of the reader.
int | xmlTextReaderIsNamespaceDecl (xmlTextReader *reader)
| Determine whether the current node is a namespace declaration rather than a regular attribute.
const xmlChar * | xmlTextReaderConstBaseUri (xmlTextReader *reader)
| The base URI of the node.
const xmlChar * | xmlTextReaderConstLocalName (xmlTextReader *reader)
| The local name of the node.
const xmlChar * | xmlTextReaderConstName (xmlTextReader *reader)
| The qualified name of the node, equal to Prefix :LocalName.
const xmlChar * | xmlTextReaderConstNamespaceUri (xmlTextReader *reader)
| The URI defining the namespace associated with the node.
const xmlChar * | xmlTextReaderConstPrefix (xmlTextReader *reader)
| A shorthand reference to the namespace associated with the node.
const xmlChar * | xmlTextReaderConstXmlLang (xmlTextReader *reader)
| The xml:lang scope within which the node resides.
const xmlChar * | xmlTextReaderConstString (xmlTextReader *reader, const xmlChar *str)
| Get an interned string from the reader, allows for example to speedup string name comparisons.
const xmlChar * | xmlTextReaderConstValue (xmlTextReader *reader)
| Provides the text value of the node if present.
xmlChar * | xmlTextReaderBaseUri (xmlTextReader *reader)
| The base URI of the node.
xmlChar * | xmlTextReaderLocalName (xmlTextReader *reader)
| The local name of the node.
xmlChar * | xmlTextReaderName (xmlTextReader *reader)
| The qualified name of the node, equal to Prefix :LocalName.
xmlChar * | xmlTextReaderNamespaceUri (xmlTextReader *reader)
| The URI defining the namespace associated with the node.
xmlChar * | xmlTextReaderPrefix (xmlTextReader *reader)
| A shorthand reference to the namespace associated with the node.
xmlChar * | xmlTextReaderXmlLang (xmlTextReader *reader)
| The xml:lang scope within which the node resides.
xmlChar * | xmlTextReaderValue (xmlTextReader *reader)
| Provides the text value of the node if present.
int | xmlTextReaderClose (xmlTextReader *reader)
| This method releases any resources allocated by the current instance changes the state to Closed and close any underlying input.
xmlChar * | xmlTextReaderGetAttributeNo (xmlTextReader *reader, int no)
| Provides the value of the attribute with the specified index relative to the containing element.
xmlChar * | xmlTextReaderGetAttribute (xmlTextReader *reader, const xmlChar *name)
| Provides the value of the attribute with the specified qualified name.
xmlChar * | xmlTextReaderGetAttributeNs (xmlTextReader *reader, const xmlChar *localName, const xmlChar *namespaceURI)
| Provides the value of the specified attribute.
xmlParserInputBuffer * | xmlTextReaderGetRemainder (xmlTextReader *reader)
| Method to get the remainder of the buffered XML.
xmlChar * | xmlTextReaderLookupNamespace (xmlTextReader *reader, const xmlChar *prefix)
| Resolves a namespace prefix in the scope of the current element.
int | xmlTextReaderMoveToAttributeNo (xmlTextReader *reader, int no)
| Moves the position of the current instance to the attribute with the specified index relative to the containing element.
int | xmlTextReaderMoveToAttribute (xmlTextReader *reader, const xmlChar *name)
| Moves the position of the current instance to the attribute with the specified qualified name.
int | xmlTextReaderMoveToAttributeNs (xmlTextReader *reader, const xmlChar *localName, const xmlChar *namespaceURI)
| Moves the position of the current instance to the attribute with the specified local name and namespace URI.
int | xmlTextReaderMoveToFirstAttribute (xmlTextReader *reader)
| Moves the position of the current instance to the first attribute associated with the current node.
int | xmlTextReaderMoveToNextAttribute (xmlTextReader *reader)
| Moves the position of the current instance to the next attribute associated with the current node.
int | xmlTextReaderMoveToElement (xmlTextReader *reader)
| Moves the position of the current instance to the node that contains the current Attribute node.
int | xmlTextReaderNormalization (xmlTextReader *reader)
| The value indicating whether to normalize white space and attribute values.
const xmlChar * | xmlTextReaderConstEncoding (xmlTextReader *reader)
| Determine the encoding of the document being read.
int | xmlTextReaderSetParserProp (xmlTextReader *reader, int prop, int value)
| Change the parser processing behaviour by changing some of its internal properties.
int | xmlTextReaderGetParserProp (xmlTextReader *reader, int prop)
| Read the parser internal property.
xmlNode * | xmlTextReaderCurrentNode (xmlTextReader *reader)
| Hacking interface allowing to get the xmlNode corresponding to the current node being accessed by the xmlTextReader.
int | xmlTextReaderGetParserLineNumber (xmlTextReader *reader)
| Provide the line number of the current parsing point.
int | xmlTextReaderGetParserColumnNumber (xmlTextReader *reader)
| Provide the column number of the current parsing point.
xmlNode * | xmlTextReaderPreserve (xmlTextReader *reader)
| This tells the XML Reader to preserve the current node.
int | xmlTextReaderPreservePattern (xmlTextReader *reader, const xmlChar *pattern, const xmlChar **namespaces)
| This tells the XML Reader to preserve all nodes matched by the pattern.
xmlDoc * | xmlTextReaderCurrentDoc (xmlTextReader *reader)
| Hacking interface allowing to get the xmlDoc corresponding to the current document being accessed by the xmlTextReader.
xmlNode * | xmlTextReaderExpand (xmlTextReader *reader)
| Reads the contents of the current node and the full subtree.
int | xmlTextReaderNext (xmlTextReader *reader)
| Skip to the node following the current one in document order while avoiding the subtree if any.
int | xmlTextReaderNextSibling (xmlTextReader *reader)
| Skip to the node following the current one in document order while avoiding the subtree if any.
int | xmlTextReaderIsValid (xmlTextReader *reader)
| Retrieve the validity status from the parser context.
int | xmlTextReaderRelaxNGValidate (xmlTextReader *reader, const char *rng)
| Use RelaxNG schema to validate the document as it is processed.
int | xmlTextReaderRelaxNGValidateCtxt (xmlTextReader *reader, xmlRelaxNGValidCtxt *ctxt, int options)
| Use RelaxNG schema context to validate the document as it is processed.
int | xmlTextReaderRelaxNGSetSchema (xmlTextReader *reader, xmlRelaxNG *schema)
| Use RelaxNG to validate the document as it is processed.
int | xmlTextReaderSchemaValidate (xmlTextReader *reader, const char *xsd)
| Use W3C XSD schema to validate the document as it is processed.
int | xmlTextReaderSchemaValidateCtxt (xmlTextReader *reader, xmlSchemaValidCtxt *ctxt, int options)
| Use W3C XSD schema context to validate the document as it is processed.
int | xmlTextReaderSetSchema (xmlTextReader *reader, xmlSchema *schema)
| Use XSD Schema to validate the document as it is processed.
const xmlChar * | xmlTextReaderConstXmlVersion (xmlTextReader *reader)
| Determine the XML version of the document being read.
int | xmlTextReaderStandalone (xmlTextReader *reader)
| Determine the standalone status of the document being read.
long | xmlTextReaderByteConsumed (xmlTextReader *reader)
| This function provides the current index of the parser used by the reader, relative to the start of the current entity.
xmlTextReader * | xmlReaderWalker (xmlDoc *doc)
| Create an xmltextReader for a preparsed document.
xmlTextReader * | xmlReaderForDoc (const xmlChar *cur, const char *URL, const char *encoding, int options)
| Create an xmltextReader for an XML in-memory document.
xmlTextReader * | xmlReaderForFile (const char *filename, const char *encoding, int options)
| parse an XML file from the filesystem or the network.
xmlTextReader * | xmlReaderForMemory (const char *buffer, int size, const char *URL, const char *encoding, int options)
| Create an xmltextReader for an XML in-memory document.
xmlTextReader * | xmlReaderForFd (int fd, const char *URL, const char *encoding, int options)
| Create an xmltextReader for an XML from a file descriptor.
xmlTextReader * | xmlReaderForIO (xmlInputReadCallback ioread, xmlInputCloseCallback ioclose, void *ioctx, const char *URL, const char *encoding, int options)
| Create an xmltextReader for an XML document from I/O functions and source.
int | xmlReaderNewWalker (xmlTextReader *reader, xmlDoc *doc)
| Setup an xmltextReader to parse a preparsed XML document.
int | xmlReaderNewDoc (xmlTextReader *reader, const xmlChar *cur, const char *URL, const char *encoding, int options)
| Setup an xmltextReader to parse an XML in-memory document.
int | xmlReaderNewFile (xmlTextReader *reader, const char *filename, const char *encoding, int options)
| parse an XML file from the filesystem or the network.
int | xmlReaderNewMemory (xmlTextReader *reader, const char *buffer, int size, const char *URL, const char *encoding, int options)
| Setup an xmltextReader to parse an XML in-memory document.
int | xmlReaderNewFd (xmlTextReader *reader, int fd, const char *URL, const char *encoding, int options)
| Setup an xmltextReader to parse an XML from a file descriptor.
int | xmlReaderNewIO (xmlTextReader *reader, xmlInputReadCallback ioread, xmlInputCloseCallback ioclose, void *ioctx, const char *URL, const char *encoding, int options)
| Setup an xmltextReader to parse an XML document from I/O functions and source.
int | xmlTextReaderLocatorLineNumber (xmlTextReaderLocatorPtr locator)
| Obtain the line number for the given locator.
xmlChar * | xmlTextReaderLocatorBaseURI (xmlTextReaderLocatorPtr locator)
| Obtain the base URI for the given locator.
void | xmlTextReaderSetErrorHandler (xmlTextReader *reader, xmlTextReaderErrorFunc f, void *arg)
| Register a callback function that will be called on error and warnings.
void | xmlTextReaderSetStructuredErrorHandler (xmlTextReader *reader, xmlStructuredErrorFunc f, void *arg)
| xmlTextReaderSetStructuredErrorHandler:
void | xmlTextReaderGetErrorHandler (xmlTextReader *reader, xmlTextReaderErrorFunc *f, void **arg)
| Retrieve the error callback function and user argument.
void | xmlTextReaderSetResourceLoader (xmlTextReader *reader, xmlResourceLoader loader, void *data)
| Register a callback function that will be called to load external resources like entities.

## Detailed Description

the XMLReader implementation

API of the XML streaming API based on C# interfaces.

Copyright
  See Copyright for the status of this software.

Author
  Daniel Veillard

## Typedef Documentation

## ◆ xmlTextReaderErrorFunc

typedef void(* xmlTextReaderErrorFunc) (void *arg, const char *msg, xmlParserSeverities severity, xmlTextReaderLocatorPtr locator)

Signature of an error callback from a reader parser.

Parameters

  arg | the user argument
  msg | the message
  severity | the severity of the error
  locator | a locator indicating where the error occurred

## Enumeration Type Documentation

## ◆ xmlReaderTypes

enum xmlReaderTypes

Predefined constants for the different types of nodes.

Enumerator
XML_READER_TYPE_NONE | unknown or error
XML_READER_TYPE_ELEMENT | element
XML_READER_TYPE_ATTRIBUTE | attribute
XML_READER_TYPE_TEXT | text
XML_READER_TYPE_CDATA | CDATA section.
XML_READER_TYPE_ENTITY_REFERENCE | entity reference
XML_READER_TYPE_ENTITY | unused
XML_READER_TYPE_PROCESSING_INSTRUCTION | processing instruction
XML_READER_TYPE_COMMENT | comment
XML_READER_TYPE_DOCUMENT | document
XML_READER_TYPE_DOCUMENT_TYPE | unused
XML_READER_TYPE_DOCUMENT_FRAGMENT | document fragment
XML_READER_TYPE_NOTATION | notation, unused
XML_READER_TYPE_WHITESPACE | whitespace
XML_READER_TYPE_SIGNIFICANT_WHITESPACE | significant whitespace
XML_READER_TYPE_END_ELEMENT | end of element
XML_READER_TYPE_END_ENTITY | unused
XML_READER_TYPE_XML_DECLARATION | unused

## Function Documentation

## ◆ xmlFreeTextReader()

void xmlFreeTextReader | ( | xmlTextReader * | reader | ) |

Deallocate all the resources associated to the reader.

Parameters

  reader | the xmlTextReader

## ◆ xmlNewTextReader()

xmlTextReader * xmlNewTextReader | ( | xmlParserInputBuffer * | input,
|  | const char * | URI )

Create an xmlTextReader structure fed with input.

Parameters

  input | the xmlParserInputBuffer used to read data
  URI | the URI information for the source if available

Returns
  the new xmlTextReader or NULL in case of error

## ◆ xmlNewTextReaderFilename()

xmlTextReader * xmlNewTextReaderFilename | ( | const char * | URI | ) |

Create an xmlTextReader structure fed with the resource at URI.

Parameters

  URI | the URI of the resource to process

Returns
  the new xmlTextReader or NULL in case of error

## ◆ xmlReaderForDoc()

xmlTextReader * xmlReaderForDoc | ( | const xmlChar * | cur,
|  | const char * | URL,
|  | const char * | encoding,
|  | int | options )

Create an xmltextReader for an XML in-memory document.

The parsing flags options are a combination of xmlParserOption.

Parameters

  cur | a pointer to a zero terminated string
  URL | the base URL to use for the document
  encoding | the document encoding, or NULL
  options | a combination of xmlParserOption

Returns
  the new reader or NULL in case of error.

## ◆ xmlReaderForFd()

xmlTextReader * xmlReaderForFd | ( | int | fd,
|  | const char * | URL,
|  | const char * | encoding,
|  | int | options )

Create an xmltextReader for an XML from a file descriptor.

The parsing flags options are a combination of xmlParserOption. NOTE that the file descriptor will not be closed when the reader is closed or reset.

Parameters

  fd | an open file descriptor
  URL | the base URL to use for the document
  encoding | the document encoding, or NULL
  options | a combination of xmlParserOption

Returns
  the new reader or NULL in case of error.

## ◆ xmlReaderForFile()

xmlTextReader * xmlReaderForFile | ( | const char * | filename,
|  | const char * | encoding,
|  | int | options )

parse an XML file from the filesystem or the network.

The parsing flags options are a combination of xmlParserOption.

Parameters

  filename | a file or URL
  encoding | the document encoding, or NULL
  options | a combination of xmlParserOption

Returns
  the new reader or NULL in case of error.

## ◆ xmlReaderForIO()

xmlTextReader * xmlReaderForIO | ( | xmlInputReadCallback | ioread,
|  | xmlInputCloseCallback | ioclose,
|  | void * | ioctx,
|  | const char * | URL,
|  | const char * | encoding,
|  | int | options )

Create an xmltextReader for an XML document from I/O functions and source.

The parsing flags options are a combination of xmlParserOption.

Parameters

  ioread | an I/O read function
  ioclose | an I/O close function
  ioctx | an I/O handler
  URL | the base URL to use for the document
  encoding | the document encoding, or NULL
  options | a combination of xmlParserOption

Returns
  the new reader or NULL in case of error.

## ◆ xmlReaderForMemory()

xmlTextReader * xmlReaderForMemory | ( | const char * | buffer,
|  | int | size,
|  | const char * | URL,
|  | const char * | encoding,
|  | int | options )

Create an xmltextReader for an XML in-memory document.

The parsing flags options are a combination of xmlParserOption.

Parameters

  buffer | a pointer to a char array
  size | the size of the array
  URL | the base URL to use for the document
  encoding | the document encoding, or NULL
  options | a combination of xmlParserOption

Returns
  the new reader or NULL in case of error.

## ◆ xmlReaderNewDoc()

int xmlReaderNewDoc | ( | xmlTextReader * | reader,
|  | const xmlChar * | cur,
|  | const char * | URL,
|  | const char * | encoding,
|  | int | options )

Setup an xmltextReader to parse an XML in-memory document.

The parsing flags options are a combination of xmlParserOption. This reuses the existing reader xmlTextReader.

Parameters

  reader | an XML reader
  cur | a pointer to a zero terminated string
  URL | the base URL to use for the document
  encoding | the document encoding, or NULL
  options | a combination of xmlParserOption

Returns
  0 in case of success and -1 in case of error

## ◆ xmlReaderNewFd()

int xmlReaderNewFd | ( | xmlTextReader * | reader,
|  | int | fd,
|  | const char * | URL,
|  | const char * | encoding,
|  | int | options )

Setup an xmltextReader to parse an XML from a file descriptor.

NOTE that the file descriptor will not be closed when the reader is closed or reset. The parsing flags options are a combination of xmlParserOption. This reuses the existing reader xmlTextReader.

Parameters

  reader | an XML reader
  fd | an open file descriptor
  URL | the base URL to use for the document
  encoding | the document encoding, or NULL
  options | a combination of xmlParserOption

Returns
  0 in case of success and -1 in case of error

## ◆ xmlReaderNewFile()

int xmlReaderNewFile | ( | xmlTextReader * | reader,
|  | const char * | filename,
|  | const char * | encoding,
|  | int | options )

parse an XML file from the filesystem or the network.

The parsing flags options are a combination of xmlParserOption. This reuses the existing reader xmlTextReader.

Parameters

  reader | an XML reader
  filename | a file or URL
  encoding | the document encoding, or NULL
  options | a combination of xmlParserOption

Returns
  0 in case of success and -1 in case of error

## ◆ xmlReaderNewIO()

int xmlReaderNewIO | ( | xmlTextReader * | reader,
|  | xmlInputReadCallback | ioread,
|  | xmlInputCloseCallback | ioclose,
|  | void * | ioctx,
|  | const char * | URL,
|  | const char * | encoding,
|  | int | options )

Setup an xmltextReader to parse an XML document from I/O functions and source.

The parsing flags options are a combination of xmlParserOption. This reuses the existing reader xmlTextReader.

Parameters

  reader | an XML reader
  ioread | an I/O read function
  ioclose | an I/O close function
  ioctx | an I/O handler
  URL | the base URL to use for the document
  encoding | the document encoding, or NULL
  options | a combination of xmlParserOption

Returns
  0 in case of success and -1 in case of error

## ◆ xmlReaderNewMemory()

int xmlReaderNewMemory | ( | xmlTextReader * | reader,
|  | const char * | buffer,
|  | int | size,
|  | const char * | URL,
|  | const char * | encoding,
|  | int | options )

Setup an xmltextReader to parse an XML in-memory document.

The parsing flags options are a combination of xmlParserOption. This reuses the existing reader xmlTextReader.

Parameters

  reader | an XML reader
  buffer | a pointer to a char array
  size | the size of the array
  URL | the base URL to use for the document
  encoding | the document encoding, or NULL
  options | a combination of xmlParserOption

Returns
  0 in case of success and -1 in case of error

## ◆ xmlReaderNewWalker()

int xmlReaderNewWalker | ( | xmlTextReader * | reader,
|  | xmlDoc * | doc )

Setup an xmltextReader to parse a preparsed XML document.

This reuses the existing reader xmlTextReader.

Parameters

  reader | an XML reader
  doc | a preparsed document

Returns
  0 in case of success and -1 in case of error

## ◆ xmlReaderWalker()

xmlTextReader * xmlReaderWalker | ( | xmlDoc * | doc | ) |

Create an xmltextReader for a preparsed document.

Parameters

  doc | a preparsed document

Returns
  the new reader or NULL in case of error.

## ◆ xmlTextReaderAttributeCount()

int xmlTextReaderAttributeCount | ( | xmlTextReader * | reader | ) |

Provides the number of attributes of the current node.

Parameters

  reader | the xmlTextReader used

Returns
  0 i no attributes, -1 in case of error or the attribute count

## ◆ xmlTextReaderBaseUri()

xmlChar * xmlTextReaderBaseUri | ( | xmlTextReader * | reader | ) |

The base URI of the node.

Parameters

  reader | the xmlTextReader used

Returns
  the base URI or NULL if not available, if non NULL it need to be freed by the caller.

## ◆ xmlTextReaderByteConsumed()

long xmlTextReaderByteConsumed | ( | xmlTextReader * | reader | ) |

This function provides the current index of the parser used by the reader, relative to the start of the current entity.

This function actually just wraps a call to xmlByteConsumed for the parser context associated with the reader. See xmlByteConsumed for more information.

Deprecated
  The returned value is mostly random and useless. It reflects the parser reading ahead and is in no way related to the current node.

Parameters

  reader | an XML reader

Returns
  the index in bytes from the beginning of the entity or -1 in case the index could not be computed.

## ◆ xmlTextReaderClose()

int xmlTextReaderClose | ( | xmlTextReader * | reader | ) |

This method releases any resources allocated by the current instance changes the state to Closed and close any underlying input.

Parameters

  reader | the xmlTextReader used

Returns
  0 or -1 in case of error

## ◆ xmlTextReaderConstBaseUri()

const xmlChar * xmlTextReaderConstBaseUri | ( | xmlTextReader * | reader | ) |

The base URI of the node.

Parameters

  reader | the xmlTextReader used

Returns
  the base URI or NULL if not available, the string will be deallocated with the reader

## ◆ xmlTextReaderConstEncoding()

const xmlChar * xmlTextReaderConstEncoding | ( | xmlTextReader * | reader | ) |

Determine the encoding of the document being read.

Parameters

  reader | the xmlTextReader used

Returns
  a string containing the encoding of the document or NULL in case of error. The string is deallocated with the reader.

## ◆ xmlTextReaderConstLocalName()

const xmlChar * xmlTextReaderConstLocalName | ( | xmlTextReader * | reader | ) |

The local name of the node.

Parameters

  reader | the xmlTextReader used

Returns
  the local name or NULL if not available, the string will be deallocated with the reader.

## ◆ xmlTextReaderConstName()

const xmlChar * xmlTextReaderConstName | ( | xmlTextReader * | reader | ) |

The qualified name of the node, equal to Prefix :LocalName.

Parameters

  reader | the xmlTextReader used

Returns
  the local name or NULL if not available, the string is deallocated with the reader.

## ◆ xmlTextReaderConstNamespaceUri()

const xmlChar * xmlTextReaderConstNamespaceUri | ( | xmlTextReader * | reader | ) |

The URI defining the namespace associated with the node.

Parameters

  reader | the xmlTextReader used

Returns
  the namespace URI or NULL if not available, the string will be deallocated with the reader

## ◆ xmlTextReaderConstPrefix()

const xmlChar * xmlTextReaderConstPrefix | ( | xmlTextReader * | reader | ) |

A shorthand reference to the namespace associated with the node.

Parameters

  reader | the xmlTextReader used

Returns
  the prefix or NULL if not available, the string is deallocated with the reader.

## ◆ xmlTextReaderConstString()

const xmlChar * xmlTextReaderConstString | ( | xmlTextReader * | reader,
|  | const xmlChar * | str )

Get an interned string from the reader, allows for example to speedup string name comparisons.

Parameters

  reader | the xmlTextReader used
  str | the string to intern.

Returns
  an interned copy of the string or NULL in case of error. The string will be deallocated with the reader.

## ◆ xmlTextReaderConstValue()

const xmlChar * xmlTextReaderConstValue | ( | xmlTextReader * | reader | ) |

Provides the text value of the node if present.

Parameters

  reader | the xmlTextReader used

Returns
  the string or NULL if not available. The result will be deallocated on the next Read() operation.

## ◆ xmlTextReaderConstXmlLang()

const xmlChar * xmlTextReaderConstXmlLang | ( | xmlTextReader * | reader | ) |

The xml:lang scope within which the node resides.

Parameters

  reader | the xmlTextReader used

Returns
  the xml:lang value or NULL if none exists.

## ◆ xmlTextReaderConstXmlVersion()

const xmlChar * xmlTextReaderConstXmlVersion | ( | xmlTextReader * | reader | ) |

Determine the XML version of the document being read.

Parameters

  reader | the xmlTextReader used

Returns
  a string containing the XML version of the document or NULL in case of error. The string is deallocated with the reader.

## ◆ xmlTextReaderCurrentDoc()

xmlDoc * xmlTextReaderCurrentDoc | ( | xmlTextReader * | reader | ) |

Hacking interface allowing to get the xmlDoc corresponding to the current document being accessed by the xmlTextReader.

NOTE: as a result of this call, the reader will not destroy the associated XML document and calling xmlFreeDoc on the result is needed once the reader parsing has finished.

Parameters

  reader | the xmlTextReader used

Returns
  the xmlDoc or NULL in case of error.

## ◆ xmlTextReaderCurrentNode()

xmlNode * xmlTextReaderCurrentNode | ( | xmlTextReader * | reader | ) |

Hacking interface allowing to get the xmlNode corresponding to the current node being accessed by the xmlTextReader.

This is dangerous because the underlying node may be destroyed on the next Reads.

Parameters

  reader | the xmlTextReader used

Returns
  the xmlNode or NULL in case of error.

## ◆ xmlTextReaderDepth()

int xmlTextReaderDepth | ( | xmlTextReader * | reader | ) |

The depth of the node in the tree.

Parameters

  reader | the xmlTextReader used

Returns
  the depth or -1 in case of error

## ◆ xmlTextReaderExpand()

xmlNode * xmlTextReaderExpand | ( | xmlTextReader * | reader | ) |

Reads the contents of the current node and the full subtree.

It then makes the subtree available until the next xmlTextReaderRead call

Parameters

  reader | the xmlTextReader used

Returns
  a node pointer valid until the next xmlTextReaderRead call or NULL in case of error.

## ◆ xmlTextReaderGetAttribute()

xmlChar * xmlTextReaderGetAttribute | ( | xmlTextReader * | reader,
|  | const xmlChar * | name )

Provides the value of the attribute with the specified qualified name.

Parameters

  reader | the xmlTextReader used
  name | the qualified name of the attribute.

Returns
  a string containing the value of the specified attribute, or NULL in case of error. The string must be deallocated by the caller.

## ◆ xmlTextReaderGetAttributeNo()

xmlChar * xmlTextReaderGetAttributeNo | ( | xmlTextReader * | reader,
|  | int | no )

Provides the value of the attribute with the specified index relative to the containing element.

Parameters

  reader | the xmlTextReader used
  no | the zero-based index of the attribute relative to the containing element

Returns
  a string containing the value of the specified attribute, or NULL in case of error. The string must be deallocated by the caller.

## ◆ xmlTextReaderGetAttributeNs()

xmlChar * xmlTextReaderGetAttributeNs | ( | xmlTextReader * | reader,
|  | const xmlChar * | localName,
|  | const xmlChar * | namespaceURI )

Provides the value of the specified attribute.

Parameters

  reader | the xmlTextReader used
  localName | the local name of the attribute.
  namespaceURI | the namespace URI of the attribute.

Returns
  a string containing the value of the specified attribute, or NULL in case of error. The string must be deallocated by the caller.

## ◆ xmlTextReaderGetErrorHandler()

void xmlTextReaderGetErrorHandler | ( | xmlTextReader * | reader,
|  | xmlTextReaderErrorFunc * | f,
|  | void ** | arg )

Retrieve the error callback function and user argument.

Parameters

  reader | the xmlTextReader used
  f | the callback function or NULL is no callback has been registered
  arg | a user argument

## ◆ xmlTextReaderGetLastError()

const xmlError * xmlTextReaderGetLastError | ( | xmlTextReader * | reader | ) |

Since
  2.13.0

Parameters

  reader | an XML reader

Returns
  the last error.

## ◆ xmlTextReaderGetParserColumnNumber()

int xmlTextReaderGetParserColumnNumber | ( | xmlTextReader * | reader | ) |

Provide the column number of the current parsing point.

Parameters

  reader | the user data (XML reader context)

Returns
  an int or 0 if not available

## ◆ xmlTextReaderGetParserLineNumber()

int xmlTextReaderGetParserLineNumber | ( | xmlTextReader * | reader | ) |

Provide the line number of the current parsing point.

Parameters

  reader | the user data (XML reader context)

Returns
  an int or 0 if not available

## ◆ xmlTextReaderGetParserProp()

int xmlTextReaderGetParserProp | ( | xmlTextReader * | reader,
|  | int | prop )

Read the parser internal property.

Parameters

  reader | the xmlTextReader used
  prop | the xmlParserProperties to get

Returns
  the value, usually 0 or 1, or -1 in case of error.

## ◆ xmlTextReaderGetRemainder()

xmlParserInputBuffer * xmlTextReaderGetRemainder | ( | xmlTextReader * | reader | ) |

Method to get the remainder of the buffered XML.

this method stops the parser, set its state to End Of File and return the input stream with what is left that the parser did not use.

The implementation is not good, the parser certainly progressed past what's left in reader->input, and there is an allocation problem. Best would be to rewrite it differently.

Parameters

  reader | the xmlTextReader used

Returns
  the xmlParserInputBuffer attached to the XML or NULL in case of error.

## ◆ xmlTextReaderHasAttributes()

int xmlTextReaderHasAttributes | ( | xmlTextReader * | reader | ) |

Whether the node has attributes.

Parameters

  reader | the xmlTextReader used

Returns
  1 if true, 0 if false, and -1 in case or error

## ◆ xmlTextReaderHasValue()

int xmlTextReaderHasValue | ( | xmlTextReader * | reader | ) |

Whether the node can have a text value.

Parameters

  reader | the xmlTextReader used

Returns
  1 if true, 0 if false, and -1 in case or error

## ◆ xmlTextReaderIsDefault()

int xmlTextReaderIsDefault | ( | xmlTextReader * | reader | ) |

Whether an Attribute node was generated from the default value defined in the DTD or schema.

Parameters

  reader | the xmlTextReader used

Returns
  0 if not defaulted, 1 if defaulted, and -1 in case of error

## ◆ xmlTextReaderIsEmptyElement()

int xmlTextReaderIsEmptyElement | ( | xmlTextReader * | reader | ) |

Check if the current node is empty.

Parameters

  reader | the xmlTextReader used

Returns
  1 if empty, 0 if not and -1 in case of error

## ◆ xmlTextReaderIsNamespaceDecl()

int xmlTextReaderIsNamespaceDecl | ( | xmlTextReader * | reader | ) |

Determine whether the current node is a namespace declaration rather than a regular attribute.

Parameters

  reader | the xmlTextReader used

Returns
  1 if the current node is a namespace declaration, 0 if it is a regular attribute or other type of node, or -1 in case of error.

## ◆ xmlTextReaderIsValid()

int xmlTextReaderIsValid | ( | xmlTextReader * | reader | ) |

Retrieve the validity status from the parser context.

Parameters

  reader | the xmlTextReader used

Returns
  the flag value 1 if valid, 0 if no, and -1 in case of error

## ◆ xmlTextReaderLocalName()

xmlChar * xmlTextReaderLocalName | ( | xmlTextReader * | reader | ) |

The local name of the node.

Parameters

  reader | the xmlTextReader used

Returns
  the local name or NULL if not available, if non NULL it need to be freed by the caller.

## ◆ xmlTextReaderLocatorBaseURI()

xmlChar * xmlTextReaderLocatorBaseURI | ( | xmlTextReaderLocatorPtr | locator | ) |

Obtain the base URI for the given locator.

Parameters

  locator | the void used

Returns
  the base URI or NULL in case of error, if non NULL it need to be freed by the caller.

## ◆ xmlTextReaderLocatorLineNumber()

int xmlTextReaderLocatorLineNumber | ( | xmlTextReaderLocatorPtr | locator | ) |

Obtain the line number for the given locator.

Parameters

  locator | the void used

Returns
  the line number or -1 in case of error.

## ◆ xmlTextReaderLookupNamespace()

xmlChar * xmlTextReaderLookupNamespace | ( | xmlTextReader * | reader,
|  | const xmlChar * | prefix )

Resolves a namespace prefix in the scope of the current element.

Parameters

  reader | the xmlTextReader used
  prefix | the prefix whose namespace URI is to be resolved. To return the default namespace, specify NULL

Returns
  a string containing the namespace URI to which the prefix maps or NULL in case of error. The string must be deallocated by the caller.

## ◆ xmlTextReaderMoveToAttribute()

int xmlTextReaderMoveToAttribute | ( | xmlTextReader * | reader,
|  | const xmlChar * | name )

Moves the position of the current instance to the attribute with the specified qualified name.

Parameters

  reader | the xmlTextReader used
  name | the qualified name of the attribute.

Returns
  1 in case of success, -1 in case of error, 0 if not found

## ◆ xmlTextReaderMoveToAttributeNo()

int xmlTextReaderMoveToAttributeNo | ( | xmlTextReader * | reader,
|  | int | no )

Moves the position of the current instance to the attribute with the specified index relative to the containing element.

Parameters

  reader | the xmlTextReader used
  no | the zero-based index of the attribute relative to the containing element.

Returns
  1 in case of success, -1 in case of error, 0 if not found

## ◆ xmlTextReaderMoveToAttributeNs()

int xmlTextReaderMoveToAttributeNs | ( | xmlTextReader * | reader,
|  | const xmlChar * | localName,
|  | const xmlChar * | namespaceURI )

Moves the position of the current instance to the attribute with the specified local name and namespace URI.

Parameters

  reader | the xmlTextReader used
  localName | the local name of the attribute.
  namespaceURI | the namespace URI of the attribute.

Returns
  1 in case of success, -1 in case of error, 0 if not found

## ◆ xmlTextReaderMoveToElement()

int xmlTextReaderMoveToElement | ( | xmlTextReader * | reader | ) |

Moves the position of the current instance to the node that contains the current Attribute node.

Parameters

  reader | the xmlTextReader used

Returns
  1 in case of success, -1 in case of error, 0 if not moved

## ◆ xmlTextReaderMoveToFirstAttribute()

int xmlTextReaderMoveToFirstAttribute | ( | xmlTextReader * | reader | ) |

Moves the position of the current instance to the first attribute associated with the current node.

Parameters

  reader | the xmlTextReader used

Returns
  1 in case of success, -1 in case of error, 0 if not found

## ◆ xmlTextReaderMoveToNextAttribute()

int xmlTextReaderMoveToNextAttribute | ( | xmlTextReader * | reader | ) |

Moves the position of the current instance to the next attribute associated with the current node.

Parameters

  reader | the xmlTextReader used

Returns
  1 in case of success, -1 in case of error, 0 if not found

## ◆ xmlTextReaderName()

xmlChar * xmlTextReaderName | ( | xmlTextReader * | reader | ) |

The qualified name of the node, equal to Prefix :LocalName.

Parameters

  reader | the xmlTextReader used

Returns
  the local name or NULL if not available, if non NULL it need to be freed by the caller.

## ◆ xmlTextReaderNamespaceUri()

xmlChar * xmlTextReaderNamespaceUri | ( | xmlTextReader * | reader | ) |

The URI defining the namespace associated with the node.

Parameters

  reader | the xmlTextReader used

Returns
  the namespace URI or NULL if not available, if non NULL it need to be freed by the caller.

## ◆ xmlTextReaderNext()

int xmlTextReaderNext | ( | xmlTextReader * | reader | ) |

Skip to the node following the current one in document order while avoiding the subtree if any.

Parameters

  reader | the xmlTextReader used

Returns
  1 if the node was read successfully, 0 if there is no more nodes to read, or -1 in case of error

## ◆ xmlTextReaderNextSibling()

int xmlTextReaderNextSibling | ( | xmlTextReader * | reader | ) |

Skip to the node following the current one in document order while avoiding the subtree if any.

Currently implemented only for Readers built on a document

Parameters

  reader | the xmlTextReader used

Returns
  1 if the node was read successfully, 0 if there is no more nodes to read, or -1 in case of error

## ◆ xmlTextReaderNodeType()

int xmlTextReaderNodeType | ( | xmlTextReader * | reader | ) |

Get the node type of the current node Reference: http://www.gnu.org/software/dotgnu/pnetlib-doc/System/Xml/XmlNodeType.html.

Parameters

  reader | the xmlTextReader used

Returns
  the xmlReaderTypes of the current node or -1 in case of error

## ◆ xmlTextReaderNormalization()

int xmlTextReaderNormalization | ( | xmlTextReader * | reader | ) |

The value indicating whether to normalize white space and attribute values.

Since attribute value and end of line normalizations are a MUST in the XML specification only the value true is accepted. The broken behaviour of accepting out of range character entities like &#0; is of course not supported either.

Parameters

  reader | the xmlTextReader used

Returns
  1 or -1 in case of error.

## ◆ xmlTextReaderPrefix()

xmlChar * xmlTextReaderPrefix | ( | xmlTextReader * | reader | ) |

A shorthand reference to the namespace associated with the node.

Parameters

  reader | the xmlTextReader used

Returns
  the prefix or NULL if not available, if non NULL it need to be freed by the caller.

## ◆ xmlTextReaderPreserve()

xmlNode * xmlTextReaderPreserve | ( | xmlTextReader * | reader | ) |

This tells the XML Reader to preserve the current node.

The caller must also use xmlTextReaderCurrentDoc to keep an handle on the resulting document once parsing has finished

Parameters

  reader | the xmlTextReader used

Returns
  the xmlNode or NULL in case of error.

## ◆ xmlTextReaderPreservePattern()

int xmlTextReaderPreservePattern | ( | xmlTextReader * | reader,
|  | const xmlChar * | pattern,
|  | const xmlChar ** | namespaces )

This tells the XML Reader to preserve all nodes matched by the pattern.

The caller must also use xmlTextReaderCurrentDoc to keep an handle on the resulting document once parsing has finished

Parameters

  reader | the xmlTextReader used
  pattern | an XPath subset pattern
  namespaces | the prefix definitions, array of [URI, prefix] or NULL

Returns
  a non-negative number in case of success and -1 in case of error

## ◆ xmlTextReaderQuoteChar()

int xmlTextReaderQuoteChar | ( | xmlTextReader * | reader | ) |

The quotation mark character used to enclose the value of an attribute.

Parameters

  reader | the xmlTextReader used

Returns
  " or ' and -1 in case of error

## ◆ xmlTextReaderRead()

int xmlTextReaderRead | ( | xmlTextReader * | reader | ) |

Moves the position of the current instance to the next node in the stream, exposing its properties.

Parameters

  reader | the xmlTextReader used

Returns
  1 if the node was read successfully, 0 if there is no more nodes to read, or -1 in case of error

## ◆ xmlTextReaderReadAttributeValue()

int xmlTextReaderReadAttributeValue | ( | xmlTextReader * | reader | ) |

Parses an attribute value into one or more Text and EntityReference nodes.

Parameters

  reader | the xmlTextReader used

Returns
  1 in case of success, 0 if the reader was not positioned on an attribute node or all the attribute values have been read, or -1 in case of error.

## ◆ xmlTextReaderReadInnerXml()

xmlChar * xmlTextReaderReadInnerXml | ( | xmlTextReader * | reader | ) |

Reads the contents of the current node, including child nodes and markup.

Parameters

  reader | the xmlTextReader used

Returns
  a string containing the XML content, or NULL if the current node is neither an element nor attribute, or has no child nodes. The string must be deallocated by the caller.

## ◆ xmlTextReaderReadOuterXml()

xmlChar * xmlTextReaderReadOuterXml | ( | xmlTextReader * | reader | ) |

Reads the contents of the current node, including child nodes and markup.

Parameters

  reader | the xmlTextReader used

Returns
  a string containing the node and any XML content, or NULL if the current node cannot be serialized. The string must be deallocated by the caller.

## ◆ xmlTextReaderReadState()

int xmlTextReaderReadState | ( | xmlTextReader * | reader | ) |

Gets the read state of the reader.

Parameters

  reader | the xmlTextReader used

Returns
  the state value, or -1 in case of error

## ◆ xmlTextReaderReadString()

xmlChar * xmlTextReaderReadString | ( | xmlTextReader * | reader | ) |

Reads the contents of an element or a text node as a string.

Parameters

  reader | the xmlTextReader used

Returns
  a string containing the contents of the non-empty Element or Text node (including CDATA sections), or NULL if the reader is positioned on any other type of node. The string must be deallocated by the caller.

## ◆ xmlTextReaderRelaxNGSetSchema()

int xmlTextReaderRelaxNGSetSchema | ( | xmlTextReader * | reader,
|  | xmlRelaxNG * | schema )

Use RelaxNG to validate the document as it is processed.

Activation is only possible before the first Read(). if schema is NULL, then RelaxNG validation is deactivated. The schema should not be freed until the reader is deallocated or its use has been deactivated.

Parameters

  reader | the xmlTextReader used
  schema | a precompiled RelaxNG schema

Returns
  0 in case the RelaxNG validation could be (de)activated and -1 in case of error.

## ◆ xmlTextReaderRelaxNGValidate()

int xmlTextReaderRelaxNGValidate | ( | xmlTextReader * | reader,
|  | const char * | rng )

Use RelaxNG schema to validate the document as it is processed.

Activation is only possible before the first Read(). If rng is NULL, then RelaxNG schema validation is deactivated.

Parameters

  reader | the xmlTextReader used
  rng | the path to a RelaxNG schema or NULL

Returns
  0 in case the schemas validation could be (de)activated and -1 in case of error.

## ◆ xmlTextReaderRelaxNGValidateCtxt()

int xmlTextReaderRelaxNGValidateCtxt | ( | xmlTextReader * | reader,
|  | xmlRelaxNGValidCtxt * | ctxt,
|  | int | options )

Use RelaxNG schema context to validate the document as it is processed.

Activation is only possible before the first Read(). If ctxt is NULL, then RelaxNG schema validation is deactivated.

Parameters

  reader | the xmlTextReader used
  ctxt | the RelaxNG schema validation context or NULL
  options | options (not used yet)

Returns
  0 in case the schemas validation could be (de)activated and -1 in case of error.

## ◆ xmlTextReaderSchemaValidate()

int xmlTextReaderSchemaValidate | ( | xmlTextReader * | reader,
|  | const char * | xsd )

Use W3C XSD schema to validate the document as it is processed.

Activation is only possible before the first Read(). If xsd is NULL, then XML Schema validation is deactivated.

Parameters

  reader | the xmlTextReader used
  xsd | the path to a W3C XSD schema or NULL

Returns
  0 in case the schemas validation could be (de)activated and -1 in case of error.

## ◆ xmlTextReaderSchemaValidateCtxt()

int xmlTextReaderSchemaValidateCtxt | ( | xmlTextReader * | reader,
|  | xmlSchemaValidCtxt * | ctxt,
|  | int | options )

Use W3C XSD schema context to validate the document as it is processed.

Activation is only possible before the first Read(). If ctxt is NULL, then XML Schema validation is deactivated.

Parameters

  reader | the xmlTextReader used
  ctxt | the XML Schema validation context or NULL
  options | options (not used yet)

Returns
  0 in case the schemas validation could be (de)activated and -1 in case of error.

## ◆ xmlTextReaderSetErrorHandler()

void xmlTextReaderSetErrorHandler | ( | xmlTextReader * | reader,
|  | xmlTextReaderErrorFunc | f,
|  | void * | arg )

Register a callback function that will be called on error and warnings.

Deprecated
  Use xmlTextReaderSetStructuredErrorHandler.

If f is NULL, the default error and warning handlers are restored.

Parameters

  reader | the xmlTextReader used
  f | the callback function to call on error and warnings
  arg | a user argument to pass to the callback function

## ◆ xmlTextReaderSetMaxAmplification()

void xmlTextReaderSetMaxAmplification | ( | xmlTextReader * | reader,
|  | unsigned | maxAmpl )

Set the maximum amplification factor.

See xmlCtxtSetMaxAmplification.

Parameters

  reader | an XML reader
  maxAmpl | maximum amplification factor

## ◆ xmlTextReaderSetParserProp()

int xmlTextReaderSetParserProp | ( | xmlTextReader * | reader,
|  | int | prop,
|  | int | value )

Change the parser processing behaviour by changing some of its internal properties.

Note that some properties can only be changed before any read has been done.

Parameters

  reader | the xmlTextReader used
  prop | the xmlParserProperties to set
  value | usually 0 or 1 to (de)activate it

Returns
  0 if the call was successful, or -1 in case of error

## ◆ xmlTextReaderSetResourceLoader()

void xmlTextReaderSetResourceLoader | ( | xmlTextReader * | reader,
|  | xmlResourceLoader | loader,
|  | void * | data )

Register a callback function that will be called to load external resources like entities.

Since
  2.14.0

Parameters

  reader | thr reader
  loader | resource loader
  data | user data which will be passed to the loader

## ◆ xmlTextReaderSetSchema()

int xmlTextReaderSetSchema | ( | xmlTextReader * | reader,
|  | xmlSchema * | schema )

Use XSD Schema to validate the document as it is processed.

Activation is only possible before the first Read(). if schema is NULL, then Schema validation is deactivated. The schema should not be freed until the reader is deallocated or its use has been deactivated.

Parameters

  reader | the xmlTextReader used
  schema | a precompiled Schema schema

Returns
  0 in case the Schema validation could be (de)activated and -1 in case of error.

## ◆ xmlTextReaderSetStructuredErrorHandler()

void xmlTextReaderSetStructuredErrorHandler | ( | xmlTextReader * | reader,
|  | xmlStructuredErrorFunc | f,
|  | void * | arg )

xmlTextReaderSetStructuredErrorHandler:

Register a callback function that will be called on error and warnings.

If f is NULL, the default error and warning handlers are restored.

Parameters

  reader | the xmlTextReader used
  f | the callback function to call on error and warnings
  arg | a user argument to pass to the callback function

## ◆ xmlTextReaderSetup()

int xmlTextReaderSetup | ( | xmlTextReader * | reader,
|  | xmlParserInputBuffer * | input,
|  | const char * | URL,
|  | const char * | encoding,
|  | int | options )

Setup an XML reader with new options.

Parameters

  reader | an XML reader
  input | xmlParserInputBuffer used to feed the reader, will be destroyed with it.
  URL | the base URL to use for the document
  encoding | the document encoding, or NULL
  options | a combination of xmlParserOption

Returns
  0 in case of success and -1 in case of error.

## ◆ xmlTextReaderStandalone()

int xmlTextReaderStandalone | ( | xmlTextReader * | reader | ) |

Determine the standalone status of the document being read.

Parameters

  reader | the xmlTextReader used

Returns
  1 if the document was declared to be standalone, 0 if it was declared to be not standalone, or -1 if the document did not specify its standalone status or in case of error.

## ◆ xmlTextReaderValue()

xmlChar * xmlTextReaderValue | ( | xmlTextReader * | reader | ) |

Provides the text value of the node if present.

Parameters

  reader | the xmlTextReader used

Returns
  the string or NULL if not available. The result must be deallocated with xmlFree

## ◆ xmlTextReaderXmlLang()

xmlChar * xmlTextReaderXmlLang | ( | xmlTextReader * | reader | ) |

The xml:lang scope within which the node resides.

Parameters

  reader | the xmlTextReader used

Returns
  the xml:lang value or NULL if none exists., if non NULL it need to be freed by the caller.