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xmlreader.h	file	12,531 B	0644	2026-04-16 00:00:00	edit
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editing: xmlreader.h

/**
 * @file
 * 
 * @brief 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
 */

#ifndef __XML_XMLREADER_H__
#define __XML_XMLREADER_H__

#include <libxml/xmlversion.h>
#include <libxml/tree.h>
#include <libxml/xmlerror.h>
#include <libxml/xmlIO.h>
#ifdef LIBXML_RELAXNG_ENABLED
#include <libxml/relaxng.h>
#endif
#ifdef LIBXML_SCHEMAS_ENABLED
#include <libxml/xmlschemas.h>
#endif
#include <libxml/parser.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * How severe an error callback is when the per-reader error callback API
 * is used.
 */
typedef enum {
    XML_PARSER_SEVERITY_VALIDITY_WARNING = 1,
    XML_PARSER_SEVERITY_VALIDITY_ERROR = 2,
    XML_PARSER_SEVERITY_WARNING = 3,
    XML_PARSER_SEVERITY_ERROR = 4
} xmlParserSeverities;

#ifdef LIBXML_READER_ENABLED

/**
 * Internal state values for the reader.
 */
typedef enum {
    XML_TEXTREADER_MODE_INITIAL = 0,
    XML_TEXTREADER_MODE_INTERACTIVE = 1,
    XML_TEXTREADER_MODE_ERROR = 2,
    XML_TEXTREADER_MODE_EOF =3,
    XML_TEXTREADER_MODE_CLOSED = 4,
    XML_TEXTREADER_MODE_READING = 5
} xmlTextReaderMode;

/**
 * Some common options to use with #xmlTextReaderSetParserProp, but it
 * is better to use xmlParserOption and the xmlReaderNewxxx and
 * xmlReaderForxxx APIs now.
 */
typedef enum {
    /* load external DTD */
    XML_PARSER_LOADDTD = 1,
    /* use default attributes */
    XML_PARSER_DEFAULTATTRS = 2,
    /* DTD validation */
    XML_PARSER_VALIDATE = 3,
    /* substitute entities */
    XML_PARSER_SUBST_ENTITIES = 4
} xmlParserProperties;

/**
 * Predefined constants for the different types of nodes.
 */
typedef enum {
    /** unknown or error */
    XML_READER_TYPE_NONE = 0,
    /** element */
    XML_READER_TYPE_ELEMENT = 1,
    /** attribute */
    XML_READER_TYPE_ATTRIBUTE = 2,
    /** text */
    XML_READER_TYPE_TEXT = 3,
    /** CDATA section */
    XML_READER_TYPE_CDATA = 4,
    /** entity reference */
    XML_READER_TYPE_ENTITY_REFERENCE = 5,
    /** unused */
    XML_READER_TYPE_ENTITY = 6,
    /** processing instruction */
    XML_READER_TYPE_PROCESSING_INSTRUCTION = 7,
    /** comment */
    XML_READER_TYPE_COMMENT = 8,
    /** document */
    XML_READER_TYPE_DOCUMENT = 9,
    /** unused */
    XML_READER_TYPE_DOCUMENT_TYPE = 10,
    /** document fragment */
    XML_READER_TYPE_DOCUMENT_FRAGMENT = 11,
    /** notation, unused */
    XML_READER_TYPE_NOTATION = 12,
    /** whitespace */
    XML_READER_TYPE_WHITESPACE = 13,
    /** significant whitespace */
    XML_READER_TYPE_SIGNIFICANT_WHITESPACE = 14,
    /** end of element */
    XML_READER_TYPE_END_ELEMENT = 15,
    /** unused */
    XML_READER_TYPE_END_ENTITY = 16,
    /** unused */
    XML_READER_TYPE_XML_DECLARATION = 17
} xmlReaderTypes;

/** xmlReader context */
typedef struct _xmlTextReader xmlTextReader;
typedef xmlTextReader *xmlTextReaderPtr;

/*
 * Constructors & Destructor
 */
XMLPUBFUN xmlTextReader *
			xmlNewTextReader	(xmlParserInputBuffer *input,
	                                         const char *URI);
XMLPUBFUN xmlTextReader *
			xmlNewTextReaderFilename(const char *URI);

XMLPUBFUN void
			xmlFreeTextReader	(xmlTextReader *reader);

XMLPUBFUN int
            xmlTextReaderSetup(xmlTextReader *reader,
                   xmlParserInputBuffer *input, const char *URL,
                   const char *encoding, int options);
XMLPUBFUN void
            xmlTextReaderSetMaxAmplification(xmlTextReader *reader,
                   unsigned maxAmpl);
XMLPUBFUN const xmlError *
            xmlTextReaderGetLastError(xmlTextReader *reader);

/*
 * Iterators
 */
XMLPUBFUN int
			xmlTextReaderRead	(xmlTextReader *reader);

#ifdef LIBXML_WRITER_ENABLED
XMLPUBFUN xmlChar *
			xmlTextReaderReadInnerXml(xmlTextReader *reader);

XMLPUBFUN xmlChar *
			xmlTextReaderReadOuterXml(xmlTextReader *reader);
#endif

XMLPUBFUN xmlChar *
			xmlTextReaderReadString	(xmlTextReader *reader);
XMLPUBFUN int
			xmlTextReaderReadAttributeValue(xmlTextReader *reader);

/*
 * Attributes of the node
 */
XMLPUBFUN int
			xmlTextReaderAttributeCount(xmlTextReader *reader);
XMLPUBFUN int
			xmlTextReaderDepth	(xmlTextReader *reader);
XMLPUBFUN int
			xmlTextReaderHasAttributes(xmlTextReader *reader);
XMLPUBFUN int
			xmlTextReaderHasValue(xmlTextReader *reader);
XMLPUBFUN int
			xmlTextReaderIsDefault	(xmlTextReader *reader);
XMLPUBFUN int
			xmlTextReaderIsEmptyElement(xmlTextReader *reader);
XMLPUBFUN int
			xmlTextReaderNodeType	(xmlTextReader *reader);
XMLPUBFUN int
			xmlTextReaderQuoteChar	(xmlTextReader *reader);
XMLPUBFUN int
			xmlTextReaderReadState	(xmlTextReader *reader);
XMLPUBFUN int
                        xmlTextReaderIsNamespaceDecl(xmlTextReader *reader);

XMLPUBFUN const xmlChar *
		    xmlTextReaderConstBaseUri	(xmlTextReader *reader);
XMLPUBFUN const xmlChar *
		    xmlTextReaderConstLocalName	(xmlTextReader *reader);
XMLPUBFUN const xmlChar *
		    xmlTextReaderConstName	(xmlTextReader *reader);
XMLPUBFUN const xmlChar *
		    xmlTextReaderConstNamespaceUri(xmlTextReader *reader);
XMLPUBFUN const xmlChar *
		    xmlTextReaderConstPrefix	(xmlTextReader *reader);
XMLPUBFUN const xmlChar *
		    xmlTextReaderConstXmlLang	(xmlTextReader *reader);
XMLPUBFUN const xmlChar *
		    xmlTextReaderConstString	(xmlTextReader *reader,
						 const xmlChar *str);
XMLPUBFUN const xmlChar *
		    xmlTextReaderConstValue	(xmlTextReader *reader);

/*
 * use the Const version of the routine for
 * better performance and simpler code
 */
XMLPUBFUN xmlChar *
			xmlTextReaderBaseUri	(xmlTextReader *reader);
XMLPUBFUN xmlChar *
			xmlTextReaderLocalName	(xmlTextReader *reader);
XMLPUBFUN xmlChar *
			xmlTextReaderName	(xmlTextReader *reader);
XMLPUBFUN xmlChar *
			xmlTextReaderNamespaceUri(xmlTextReader *reader);
XMLPUBFUN xmlChar *
			xmlTextReaderPrefix	(xmlTextReader *reader);
XMLPUBFUN xmlChar *
			xmlTextReaderXmlLang	(xmlTextReader *reader);
XMLPUBFUN xmlChar *
			xmlTextReaderValue	(xmlTextReader *reader);

/*
 * Methods of the XmlTextReader
 */
XMLPUBFUN int
		    xmlTextReaderClose		(xmlTextReader *reader);
XMLPUBFUN xmlChar *
		    xmlTextReaderGetAttributeNo	(xmlTextReader *reader,
						 int no);
XMLPUBFUN xmlChar *
		    xmlTextReaderGetAttribute	(xmlTextReader *reader,
						 const xmlChar *name);
XMLPUBFUN xmlChar *
		    xmlTextReaderGetAttributeNs	(xmlTextReader *reader,
						 const xmlChar *localName,
						 const xmlChar *namespaceURI);
XMLPUBFUN xmlParserInputBuffer *
		    xmlTextReaderGetRemainder	(xmlTextReader *reader);
XMLPUBFUN xmlChar *
		    xmlTextReaderLookupNamespace(xmlTextReader *reader,
						 const xmlChar *prefix);
XMLPUBFUN int
		    xmlTextReaderMoveToAttributeNo(xmlTextReader *reader,
						 int no);
XMLPUBFUN int
		    xmlTextReaderMoveToAttribute(xmlTextReader *reader,
						 const xmlChar *name);
XMLPUBFUN int
		    xmlTextReaderMoveToAttributeNs(xmlTextReader *reader,
						 const xmlChar *localName,
						 const xmlChar *namespaceURI);
XMLPUBFUN int
		    xmlTextReaderMoveToFirstAttribute(xmlTextReader *reader);
XMLPUBFUN int
		    xmlTextReaderMoveToNextAttribute(xmlTextReader *reader);
XMLPUBFUN int
		    xmlTextReaderMoveToElement	(xmlTextReader *reader);
XMLPUBFUN int
		    xmlTextReaderNormalization	(xmlTextReader *reader);
XMLPUBFUN const xmlChar *
		    xmlTextReaderConstEncoding  (xmlTextReader *reader);

/*
 * Extensions
 */
XMLPUBFUN int
		    xmlTextReaderSetParserProp	(xmlTextReader *reader,
						 int prop,
						 int value);
XMLPUBFUN int
		    xmlTextReaderGetParserProp	(xmlTextReader *reader,
						 int prop);
XMLPUBFUN xmlNode *
		    xmlTextReaderCurrentNode	(xmlTextReader *reader);

XMLPUBFUN int
            xmlTextReaderGetParserLineNumber(xmlTextReader *reader);

XMLPUBFUN int
            xmlTextReaderGetParserColumnNumber(xmlTextReader *reader);

XMLPUBFUN xmlNode *
		    xmlTextReaderPreserve	(xmlTextReader *reader);
#ifdef LIBXML_PATTERN_ENABLED
XMLPUBFUN int
		    xmlTextReaderPreservePattern(xmlTextReader *reader,
						 const xmlChar *pattern,
						 const xmlChar **namespaces);
#endif /* LIBXML_PATTERN_ENABLED */
XMLPUBFUN xmlDoc *
		    xmlTextReaderCurrentDoc	(xmlTextReader *reader);
XMLPUBFUN xmlNode *
		    xmlTextReaderExpand		(xmlTextReader *reader);
XMLPUBFUN int
		    xmlTextReaderNext		(xmlTextReader *reader);
XMLPUBFUN int
		    xmlTextReaderNextSibling	(xmlTextReader *reader);
XMLPUBFUN int
		    xmlTextReaderIsValid	(xmlTextReader *reader);
#ifdef LIBXML_RELAXNG_ENABLED
XMLPUBFUN int
		    xmlTextReaderRelaxNGValidate(xmlTextReader *reader,
						 const char *rng);
XMLPUBFUN int
		    xmlTextReaderRelaxNGValidateCtxt(xmlTextReader *reader,
						 xmlRelaxNGValidCtxt *ctxt,
						 int options);

XMLPUBFUN int
		    xmlTextReaderRelaxNGSetSchema(xmlTextReader *reader,
						 xmlRelaxNG *schema);
#endif
#ifdef LIBXML_SCHEMAS_ENABLED
XMLPUBFUN int
		    xmlTextReaderSchemaValidate	(xmlTextReader *reader,
						 const char *xsd);
XMLPUBFUN int
		    xmlTextReaderSchemaValidateCtxt(xmlTextReader *reader,
						 xmlSchemaValidCtxt *ctxt,
						 int options);
XMLPUBFUN int
		    xmlTextReaderSetSchema	(xmlTextReader *reader,
						 xmlSchema *schema);
#endif
XMLPUBFUN const xmlChar *
		    xmlTextReaderConstXmlVersion(xmlTextReader *reader);
XMLPUBFUN int
		    xmlTextReaderStandalone     (xmlTextReader *reader);

/*
 * Index lookup
 */
XMLPUBFUN long
		xmlTextReaderByteConsumed	(xmlTextReader *reader);

/*
 * New more complete APIs for simpler creation and reuse of readers
 */
XMLPUBFUN xmlTextReader *
		xmlReaderWalker		(xmlDoc *doc);
XMLPUBFUN xmlTextReader *
		xmlReaderForDoc		(const xmlChar * cur,
					 const char *URL,
					 const char *encoding,
					 int options);
XMLPUBFUN xmlTextReader *
		xmlReaderForFile	(const char *filename,
					 const char *encoding,
					 int options);
XMLPUBFUN xmlTextReader *
		xmlReaderForMemory	(const char *buffer,
					 int size,
					 const char *URL,
					 const char *encoding,
					 int options);
XMLPUBFUN xmlTextReader *
		xmlReaderForFd		(int fd,
					 const char *URL,
					 const char *encoding,
					 int options);
XMLPUBFUN xmlTextReader *
		xmlReaderForIO		(xmlInputReadCallback ioread,
					 xmlInputCloseCallback ioclose,
					 void *ioctx,
					 const char *URL,
					 const char *encoding,
					 int options);

XMLPUBFUN int
		xmlReaderNewWalker	(xmlTextReader *reader,
					 xmlDoc *doc);
XMLPUBFUN int
		xmlReaderNewDoc		(xmlTextReader *reader,
					 const xmlChar * cur,
					 const char *URL,
					 const char *encoding,
					 int options);
XMLPUBFUN int
		xmlReaderNewFile	(xmlTextReader *reader,
					 const char *filename,
					 const char *encoding,
					 int options);
XMLPUBFUN int
		xmlReaderNewMemory	(xmlTextReader *reader,
					 const char *buffer,
					 int size,
					 const char *URL,
					 const char *encoding,
					 int options);
XMLPUBFUN int
		xmlReaderNewFd		(xmlTextReader *reader,
					 int fd,
					 const char *URL,
					 const char *encoding,
					 int options);
XMLPUBFUN int
		xmlReaderNewIO		(xmlTextReader *reader,
					 xmlInputReadCallback ioread,
					 xmlInputCloseCallback ioclose,
					 void *ioctx,
					 const char *URL,
					 const char *encoding,
					 int options);
/*
 * Error handling extensions
 */
typedef void *  xmlTextReaderLocatorPtr;

/**
 * Signature of an error callback from a reader parser
 *
 * @param arg  the user argument
 * @param msg  the message
 * @param severity  the severity of the error
 * @param locator  a locator indicating where the error occurred
 */
typedef void (*xmlTextReaderErrorFunc)(void *arg,
					       const char *msg,
					       xmlParserSeverities severity,
					       xmlTextReaderLocatorPtr locator);
XMLPUBFUN int
	    xmlTextReaderLocatorLineNumber(xmlTextReaderLocatorPtr locator);
XMLPUBFUN xmlChar *
	    xmlTextReaderLocatorBaseURI (xmlTextReaderLocatorPtr locator);
XMLPUBFUN void
	    xmlTextReaderSetErrorHandler(xmlTextReader *reader,
					 xmlTextReaderErrorFunc f,
					 void *arg);
XMLPUBFUN void
	    xmlTextReaderSetStructuredErrorHandler(xmlTextReader *reader,
						   xmlStructuredErrorFunc f,
						   void *arg);
XMLPUBFUN void
	    xmlTextReaderGetErrorHandler(xmlTextReader *reader,
					 xmlTextReaderErrorFunc *f,
					 void **arg);

XMLPUBFUN void
	    xmlTextReaderSetResourceLoader(xmlTextReader *reader,
					   xmlResourceLoader loader,
					   void *data);

#endif /* LIBXML_READER_ENABLED */

#ifdef __cplusplus
}
#endif

#endif /* __XML_XMLREADER_H__ */

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