parserInternals.h

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Author : William M. Brack
Date : 2005-01-02 09:53:13
Hash : 21e4ef20
Message : Re-examined the problems of configuring a "minimal" library. Synchronized the header files with the library code in order to assure that all the various conditionals (LIBXML_xxxx_ENABLED) were the same in both. Modified the API database content to more accurately reflect the conditionals. Enhanced the generation of that database. Although there was no substantial change to any of the library code's logic, a large number of files were modified to achieve the above, and the configuration script was enhanced to do some automatic enabling of features (e.g. --with-xinclude forces --with-xpath). Additionally, all the format errors discovered by apibuild.py were corrected. * configure.in: enhanced cross-checking of options * doc/apibuild.py, doc/elfgcchack.xsl, doc/libxml2-refs.xml, doc/libxml2-api.xml, gentest.py: changed the usage of the <cond> element in module descriptions * elfgcchack.h, testapi.c: regenerated with proper conditionals * HTMLparser.c, SAX.c, globals.c, tree.c, xmlschemas.c, xpath.c, testSAX.c: cleaned up conditionals * include/libxml/[SAX.h, SAX2.h, debugXML.h, encoding.h, entities.h, hash.h, parser.h, parserInternals.h, schemasInternals.h, tree.h, valid.h, xlink.h, xmlIO.h, xmlautomata.h, xmlreader.h, xpath.h]: synchronized the conditionals with the corresponding module code * doc/examples/tree2.c, doc/examples/xpath1.c, doc/examples/xpath2.c: added additional conditions required for compilation * doc/*.html, doc/html/*.html: rebuilt the docs
include/libxml/parserInternals.h
/*
 * Summary: internals routines exported by the parser.
 * Description: this module exports a number of internal parsing routines
 *              they are not really all intended for applications but
 *              can prove useful doing low level processing.
 *
 * Copy: See Copyright for the status of this software.
 *
 * Author: Daniel Veillard
 */

#ifndef __XML_PARSER_INTERNALS_H__
#define __XML_PARSER_INTERNALS_H__

#include <libxml/xmlversion.h>
#include <libxml/parser.h>
#include <libxml/HTMLparser.h>
#include <libxml/chvalid.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * xmlParserMaxDepth:
 *
 * arbitrary depth limit for the XML documents that we allow to 
 * process. This is not a limitation of the parser but a safety 
 * boundary feature.
 */
XMLPUBVAR unsigned int xmlParserMaxDepth;

 /**
  * XML_MAX_NAMELEN:
  *
  * Identifiers can be longer, but this will be more costly
  * at runtime.
  */
#define XML_MAX_NAMELEN 100

/**
 * INPUT_CHUNK:
 *
 * The parser tries to always have that amount of input ready.
 * One of the point is providing context when reporting errors.
 */
#define INPUT_CHUNK	250

/************************************************************************
 *									*
 * UNICODE version of the macros.      					*
 *									*
 ************************************************************************/
/**
 * IS_BYTE_CHAR:
 * @c:  an byte value (int)
 *
 * Macro to check the following production in the XML spec:
 *
 * [2] Char ::= #x9 | #xA | #xD | [#x20...]
 * any byte character in the accepted range
 */
#define IS_BYTE_CHAR(c)	 xmlIsChar_ch(c)

/**
 * IS_CHAR:
 * @c:  an UNICODE value (int)
 *
 * Macro to check the following production in the XML spec:
 *
 * [2] Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD]
 *                  | [#x10000-#x10FFFF]
 * any Unicode character, excluding the surrogate blocks, FFFE, and FFFF.
 */
#define IS_CHAR(c)   xmlIsCharQ(c)

/**
 * IS_CHAR_CH:
 * @c: an xmlChar (usually an unsigned char)
 *
 * Behaves like IS_CHAR on single-byte value
 */
#define IS_CHAR_CH(c)  xmlIsChar_ch(c)

/**
 * IS_BLANK:
 * @c:  an UNICODE value (int)
 *
 * Macro to check the following production in the XML spec:
 *
 * [3] S ::= (#x20 | #x9 | #xD | #xA)+
 */
#define IS_BLANK(c)  xmlIsBlankQ(c)

/**
 * IS_BLANK_CH:
 * @c:  an xmlChar value (normally unsigned char)
 *
 * Behaviour same as IS_BLANK
 */
#define IS_BLANK_CH(c)  xmlIsBlank_ch(c)

/**
 * IS_BASECHAR:
 * @c:  an UNICODE value (int)
 *
 * Macro to check the following production in the XML spec:
 *
 * [85] BaseChar ::= ... long list see REC ...
 */
#define IS_BASECHAR(c) xmlIsBaseCharQ(c)

/**
 * IS_DIGIT:
 * @c:  an UNICODE value (int)
 *
 * Macro to check the following production in the XML spec:
 *
 * [88] Digit ::= ... long list see REC ...
 */
#define IS_DIGIT(c) xmlIsDigitQ(c)

/**
 * IS_DIGIT_CH:
 * @c:  an xmlChar value (usually an unsigned char)
 *
 * Behaves like IS_DIGIT but with a single byte argument
 */
#define IS_DIGIT_CH(c)  xmlIsDigit_ch(c)

/**
 * IS_COMBINING:
 * @c:  an UNICODE value (int)
 *
 * Macro to check the following production in the XML spec:
 *
 * [87] CombiningChar ::= ... long list see REC ...
 */
#define IS_COMBINING(c) xmlIsCombiningQ(c)

/**
 * IS_COMBINING_CH:
 * @c:  an xmlChar (usually an unsigned char)
 *
 * Always false (all combining chars > 0xff)
 */
#define IS_COMBINING_CH(c) 0 

/**
 * IS_EXTENDER:
 * @c:  an UNICODE value (int)
 *
 * Macro to check the following production in the XML spec:
 *
 *
 * [89] Extender ::= #x00B7 | #x02D0 | #x02D1 | #x0387 | #x0640 |
 *                   #x0E46 | #x0EC6 | #x3005 | [#x3031-#x3035] |
 *                   [#x309D-#x309E] | [#x30FC-#x30FE]
 */
#define IS_EXTENDER(c) xmlIsExtenderQ(c)

/**
 * IS_EXTENDER_CH:
 * @c:  an xmlChar value (usually an unsigned char)
 *
 * Behaves like IS_EXTENDER but with a single-byte argument
 */
#define IS_EXTENDER_CH(c)  xmlIsExtender_ch(c)

/**
 * IS_IDEOGRAPHIC:
 * @c:  an UNICODE value (int)
 *
 * Macro to check the following production in the XML spec:
 *
 *
 * [86] Ideographic ::= [#x4E00-#x9FA5] | #x3007 | [#x3021-#x3029]
 */
#define IS_IDEOGRAPHIC(c) xmlIsIdeographicQ(c)

/**
 * IS_LETTER:
 * @c:  an UNICODE value (int)
 *
 * Macro to check the following production in the XML spec:
 *
 *
 * [84] Letter ::= BaseChar | Ideographic 
 */
#define IS_LETTER(c) (IS_BASECHAR(c) || IS_IDEOGRAPHIC(c))

/**
 * IS_LETTER_CH:
 * @c:  an xmlChar value (normally unsigned char)
 *
 * Macro behaves like IS_LETTER, but only check base chars
 *
 */
#define IS_LETTER_CH(c) xmlIsBaseChar_ch(c)

/**
 * IS_ASCII_LETTER:
 * @c: an xmlChar value
 *
 * Macro to check [a-zA-Z]
 *
 */
#define IS_ASCII_LETTER(c)	(((0x41 <= (c)) && ((c) <= 0x5a)) || \
				 ((0x61 <= (c)) && ((c) <= 0x7a)))

/**
 * IS_ASCII_DIGIT:
 * @c: an xmlChar value
 *
 * Macro to check [0-9]
 *
 */
#define IS_ASCII_DIGIT(c)	((0x30 <= (c)) && ((c) <= 0x39))

/**
 * IS_PUBIDCHAR:
 * @c:  an UNICODE value (int)
 *
 * Macro to check the following production in the XML spec:
 *
 *
 * [13] PubidChar ::= #x20 | #xD | #xA | [a-zA-Z0-9] | [-'()+,./:=?;!*#@$_%]
 */
#define IS_PUBIDCHAR(c)	xmlIsPubidCharQ(c)

/**
 * IS_PUBIDCHAR_CH:
 * @c:  an xmlChar value (normally unsigned char)
 *
 * Same as IS_PUBIDCHAR but for single-byte value
 */
#define IS_PUBIDCHAR_CH(c) xmlIsPubidChar_ch(c)

/**
 * SKIP_EOL:
 * @p:  and UTF8 string pointer
 *
 * Skips the end of line chars.
 */
#define SKIP_EOL(p) 							\
    if (*(p) == 0x13) { p++ ; if (*(p) == 0x10) p++; }			\
    if (*(p) == 0x10) { p++ ; if (*(p) == 0x13) p++; }

/**
 * MOVETO_ENDTAG:
 * @p:  and UTF8 string pointer
 *
 * Skips to the next '>' char.
 */
#define MOVETO_ENDTAG(p)						\
    while ((*p) && (*(p) != '>')) (p)++

/**
 * MOVETO_STARTTAG:
 * @p:  and UTF8 string pointer
 *
 * Skips to the next '<' char.
 */
#define MOVETO_STARTTAG(p)						\
    while ((*p) && (*(p) != '<')) (p)++

/**
 * Global variables used for predefined strings.
 */
XMLPUBVAR const xmlChar xmlStringText[];
XMLPUBVAR const xmlChar xmlStringTextNoenc[];
XMLPUBVAR const xmlChar xmlStringComment[];

/*
 * Function to finish the work of the macros where needed.
 */
XMLPUBFUN int XMLCALL                   xmlIsLetter     (int c);

/**
 * Parser context.
 */
XMLPUBFUN xmlParserCtxtPtr XMLCALL	
			xmlCreateFileParserCtxt	(const char *filename);
XMLPUBFUN xmlParserCtxtPtr XMLCALL	
			xmlCreateURLParserCtxt	(const char *filename,
						 int options);
XMLPUBFUN xmlParserCtxtPtr XMLCALL	
			xmlCreateMemoryParserCtxt(const char *buffer,
						 int size);
XMLPUBFUN xmlParserCtxtPtr XMLCALL	
			xmlCreateEntityParserCtxt(const xmlChar *URL,
						 const xmlChar *ID,
						 const xmlChar *base);
XMLPUBFUN int XMLCALL			
			xmlSwitchEncoding	(xmlParserCtxtPtr ctxt,
						 xmlCharEncoding enc);
XMLPUBFUN int XMLCALL			
			xmlSwitchToEncoding	(xmlParserCtxtPtr ctxt,
					 xmlCharEncodingHandlerPtr handler);
XMLPUBFUN int XMLCALL			
			xmlSwitchInputEncoding	(xmlParserCtxtPtr ctxt,
						 xmlParserInputPtr input,
					 xmlCharEncodingHandlerPtr handler);

#ifdef IN_LIBXML
/* internal error reporting */
XMLPUBFUN void XMLCALL
			__xmlErrEncoding	(xmlParserCtxtPtr ctxt,
						 xmlParserErrors xmlerr,
						 const char *msg,
						 const xmlChar * str1,
						 const xmlChar * str2);
#endif

/**
 * Input Streams.
 */
XMLPUBFUN xmlParserInputPtr XMLCALL	
			xmlNewStringInputStream	(xmlParserCtxtPtr ctxt,
						 const xmlChar *buffer);
XMLPUBFUN xmlParserInputPtr XMLCALL	
			xmlNewEntityInputStream	(xmlParserCtxtPtr ctxt,
						 xmlEntityPtr entity);
XMLPUBFUN void XMLCALL			
			xmlPushInput		(xmlParserCtxtPtr ctxt,
						 xmlParserInputPtr input);
XMLPUBFUN xmlChar XMLCALL			
			xmlPopInput		(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlFreeInputStream	(xmlParserInputPtr input);
XMLPUBFUN xmlParserInputPtr XMLCALL	
			xmlNewInputFromFile	(xmlParserCtxtPtr ctxt,
						 const char *filename);
XMLPUBFUN xmlParserInputPtr XMLCALL	
			xmlNewInputStream	(xmlParserCtxtPtr ctxt);

/**
 * Namespaces.
 */
XMLPUBFUN xmlChar * XMLCALL		
			xmlSplitQName		(xmlParserCtxtPtr ctxt,
						 const xmlChar *name,
						 xmlChar **prefix);

/**
 * Generic production rules.
 */
XMLPUBFUN const xmlChar * XMLCALL		
			xmlParseName		(xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlChar * XMLCALL		
			xmlParseNmtoken		(xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlChar * XMLCALL		
			xmlParseEntityValue	(xmlParserCtxtPtr ctxt,
						 xmlChar **orig);
XMLPUBFUN xmlChar * XMLCALL		
			xmlParseAttValue	(xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlChar * XMLCALL		
			xmlParseSystemLiteral	(xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlChar * XMLCALL		
			xmlParsePubidLiteral	(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParseCharData	(xmlParserCtxtPtr ctxt,
						 int cdata);
XMLPUBFUN xmlChar * XMLCALL		
			xmlParseExternalID	(xmlParserCtxtPtr ctxt,
						 xmlChar **publicID,
						 int strict);
XMLPUBFUN void XMLCALL			
			xmlParseComment		(xmlParserCtxtPtr ctxt);
XMLPUBFUN const xmlChar * XMLCALL		
			xmlParsePITarget	(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParsePI		(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParseNotationDecl	(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParseEntityDecl	(xmlParserCtxtPtr ctxt);
XMLPUBFUN int XMLCALL			
			xmlParseDefaultDecl	(xmlParserCtxtPtr ctxt,
						 xmlChar **value);
XMLPUBFUN xmlEnumerationPtr XMLCALL	
			xmlParseNotationType	(xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlEnumerationPtr XMLCALL	
			xmlParseEnumerationType	(xmlParserCtxtPtr ctxt);
XMLPUBFUN int XMLCALL			
			xmlParseEnumeratedType	(xmlParserCtxtPtr ctxt,
						 xmlEnumerationPtr *tree);
XMLPUBFUN int XMLCALL			
			xmlParseAttributeType	(xmlParserCtxtPtr ctxt,
						 xmlEnumerationPtr *tree);
XMLPUBFUN void XMLCALL			
			xmlParseAttributeListDecl(xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlElementContentPtr XMLCALL	
			xmlParseElementMixedContentDecl
						(xmlParserCtxtPtr ctxt,
						 int inputchk);
XMLPUBFUN xmlElementContentPtr XMLCALL	
			xmlParseElementChildrenContentDecl
						(xmlParserCtxtPtr ctxt,
						 int inputchk);
XMLPUBFUN int XMLCALL			
			xmlParseElementContentDecl(xmlParserCtxtPtr ctxt,
						 const xmlChar *name,
						 xmlElementContentPtr *result);
XMLPUBFUN int XMLCALL			
			xmlParseElementDecl	(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParseMarkupDecl	(xmlParserCtxtPtr ctxt);
XMLPUBFUN int XMLCALL			
			xmlParseCharRef		(xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlEntityPtr XMLCALL		
			xmlParseEntityRef	(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParseReference	(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParsePEReference	(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParseDocTypeDecl	(xmlParserCtxtPtr ctxt);
#ifdef LIBXML_SAX1_ENABLED
XMLPUBFUN const xmlChar * XMLCALL		
			xmlParseAttribute	(xmlParserCtxtPtr ctxt,
						 xmlChar **value);
XMLPUBFUN const xmlChar * XMLCALL		
			xmlParseStartTag	(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParseEndTag		(xmlParserCtxtPtr ctxt);
#endif /* LIBXML_SAX1_ENABLED */
XMLPUBFUN void XMLCALL			
			xmlParseCDSect		(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParseContent		(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParseElement		(xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlChar * XMLCALL		
			xmlParseVersionNum	(xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlChar * XMLCALL		
			xmlParseVersionInfo	(xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlChar * XMLCALL		
			xmlParseEncName		(xmlParserCtxtPtr ctxt);
XMLPUBFUN const xmlChar * XMLCALL		
			xmlParseEncodingDecl	(xmlParserCtxtPtr ctxt);
XMLPUBFUN int XMLCALL			
			xmlParseSDDecl		(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParseXMLDecl		(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParseTextDecl	(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParseMisc		(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			
			xmlParseExternalSubset	(xmlParserCtxtPtr ctxt,
						 const xmlChar *ExternalID,
						 const xmlChar *SystemID); 
/**
 * XML_SUBSTITUTE_NONE:
 *
 * If no entities need to be substituted.
 */
#define XML_SUBSTITUTE_NONE	0
/**
 * XML_SUBSTITUTE_REF:
 *
 * Whether general entities need to be substituted.
 */
#define XML_SUBSTITUTE_REF	1
/**
 * XML_SUBSTITUTE_PEREF:
 *
 * Whether parameter entities need to be substituted.
 */
#define XML_SUBSTITUTE_PEREF	2
/**
 * XML_SUBSTITUTE_BOTH:
 *
 * Both general and parameter entities need to be substituted.
 */
#define XML_SUBSTITUTE_BOTH 	3

XMLPUBFUN xmlChar * XMLCALL
		xmlStringDecodeEntities		(xmlParserCtxtPtr ctxt,
						 const xmlChar *str,
						 int what,
						 xmlChar end,
						 xmlChar  end2,
						 xmlChar end3);
XMLPUBFUN xmlChar * XMLCALL
		xmlStringLenDecodeEntities	(xmlParserCtxtPtr ctxt,
						 const xmlChar *str,
						 int len,
						 int what,
						 xmlChar end,
						 xmlChar  end2,
						 xmlChar end3);

/*
 * Generated by MACROS on top of parser.c c.f. PUSH_AND_POP.
 */
XMLPUBFUN int XMLCALL			nodePush		(xmlParserCtxtPtr ctxt,
						 xmlNodePtr value);
XMLPUBFUN xmlNodePtr XMLCALL		nodePop			(xmlParserCtxtPtr ctxt);
XMLPUBFUN int XMLCALL			inputPush		(xmlParserCtxtPtr ctxt,
						 xmlParserInputPtr value);
XMLPUBFUN xmlParserInputPtr XMLCALL	inputPop		(xmlParserCtxtPtr ctxt);
XMLPUBFUN const xmlChar * XMLCALL	namePop			(xmlParserCtxtPtr ctxt);
XMLPUBFUN int XMLCALL			namePush		(xmlParserCtxtPtr ctxt,
						 const xmlChar *value);

/*
 * other commodities shared between parser.c and parserInternals.
 */
XMLPUBFUN int XMLCALL			xmlSkipBlankChars	(xmlParserCtxtPtr ctxt);
XMLPUBFUN int XMLCALL			xmlStringCurrentChar	(xmlParserCtxtPtr ctxt,
						 const xmlChar *cur,
						 int *len);
XMLPUBFUN void XMLCALL			xmlParserHandlePEReference(xmlParserCtxtPtr ctxt);
XMLPUBFUN int XMLCALL			xmlCheckLanguageID	(const xmlChar *lang);

/*
 * Really core function shared with HTML parser.
 */
XMLPUBFUN int XMLCALL			xmlCurrentChar		(xmlParserCtxtPtr ctxt,
						 int *len);
XMLPUBFUN int XMLCALL		xmlCopyCharMultiByte	(xmlChar *out,
						 int val);
XMLPUBFUN int XMLCALL			xmlCopyChar		(int len,
						 xmlChar *out,
						 int val);
XMLPUBFUN void XMLCALL			xmlNextChar		(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL			xmlParserInputShrink	(xmlParserInputPtr in);

#ifdef LIBXML_HTML_ENABLED
/*
 * Actually comes from the HTML parser but launched from the init stuff.
 */
XMLPUBFUN void XMLCALL			htmlInitAutoClose	(void);
XMLPUBFUN htmlParserCtxtPtr XMLCALL	htmlCreateFileParserCtxt(const char *filename,
	                                         const char *encoding);
#endif

/*
 * Specific function to keep track of entities references
 * and used by the XSLT debugger.
 */
#ifdef LIBXML_LEGACY_ENABLED
/**
 * xmlEntityReferenceFunc:
 * @ent: the entity
 * @firstNode:  the fist node in the chunk
 * @lastNode:  the last nod in the chunk
 *
 * Callback function used when one needs to be able to track back the
 * provenance of a chunk of nodes inherited from an entity replacement.
 */
typedef	void	(*xmlEntityReferenceFunc)	(xmlEntityPtr ent,
						 xmlNodePtr firstNode,
						 xmlNodePtr lastNode);
  
XMLPUBFUN void XMLCALL		xmlSetEntityReferenceFunc	(xmlEntityReferenceFunc func);

XMLPUBFUN xmlChar * XMLCALL		
			xmlParseQuotedString	(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL
                        xmlParseNamespace       (xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlChar * XMLCALL		
			xmlNamespaceParseNSDef	(xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlChar * XMLCALL		
			xmlScanName		(xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlChar * XMLCALL		
			xmlNamespaceParseNCName	(xmlParserCtxtPtr ctxt);
XMLPUBFUN void XMLCALL	xmlParserHandleReference(xmlParserCtxtPtr ctxt);
XMLPUBFUN xmlChar * XMLCALL		
			xmlNamespaceParseQName	(xmlParserCtxtPtr ctxt,
						 xmlChar **prefix);
/**
 * Entities
 */
XMLPUBFUN xmlChar * XMLCALL
		xmlDecodeEntities		(xmlParserCtxtPtr ctxt,
						 int len,
						 int what,
						 xmlChar end,
						 xmlChar  end2,
						 xmlChar end3);
XMLPUBFUN void XMLCALL			
			xmlHandleEntity		(xmlParserCtxtPtr ctxt,
						 xmlEntityPtr entity);

#endif /* LIBXML_LEGACY_ENABLED */

#ifdef IN_LIBXML
/*
 * internal only
 */
XMLPUBFUN void XMLCALL
	xmlErrMemory		(xmlParserCtxtPtr ctxt,
				 const char *extra);
#endif

#ifdef __cplusplus
}
#endif
#endif /* __XML_PARSER_INTERNALS_H__ */
kc3-lang/libxml2/include/libxml/parserInternals.h

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kc3-lang/libxml2 /include/libxml/parserInternals.h
