# ## Module parserInternals from libxml2

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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. ## Table of Contents
    #define INPUT_CHUNK
    #define IS_ASCII_DIGIT
    #define IS_ASCII_LETTER
    #define IS_BASECHAR
    #define IS_BLANK
    #define IS_BLANK_CH
    #define IS_BYTE_CHAR
    #define IS_CHAR
    #define IS_CHAR_CH
    #define IS_COMBINING
    #define IS_COMBINING_CH
    #define IS_DIGIT
    #define IS_DIGIT_CH
    #define IS_EXTENDER
    #define IS_EXTENDER_CH
    #define IS_IDEOGRAPHIC
    #define IS_LETTER
    #define IS_LETTER_CH
    #define IS_PUBIDCHAR
    #define IS_PUBIDCHAR_CH
    #define MOVETO_ENDTAG
    #define MOVETO_STARTTAG
    #define SKIP_EOL
    #define XML_MAX_NAMELEN
    #define XML_SUBSTITUTE_BOTH
    #define XML_SUBSTITUTE_NONE
    #define XML_SUBSTITUTE_PEREF
    #define XML_SUBSTITUTE_REF
    htmlParserCtxtPtr	htmlCreateFileParserCtxt	(const char * filename,
    							 const char * encoding)
    void	htmlInitAutoClose		(void)
    xmlParserInputPtr	inputPop	(xmlParserCtxtPtr ctxt)
    int	inputPush			(xmlParserCtxtPtr ctxt,
    					 xmlParserInputPtr value)
    const xmlChar *	namePop			(xmlParserCtxtPtr ctxt)
    int	namePush			(xmlParserCtxtPtr ctxt,
    					 const xmlChar * value)
    xmlNodePtr	nodePop			(xmlParserCtxtPtr ctxt)
    int	nodePush			(xmlParserCtxtPtr ctxt,
    					 xmlNodePtr value)
    int	xmlCheckLanguageID		(const xmlChar * lang)
    int	xmlCopyChar			(int len,
    					 xmlChar * out,
    					 int val)
    int	xmlCopyCharMultiByte		(xmlChar * out,
    					 int val)
    xmlParserCtxtPtr	xmlCreateEntityParserCtxt	(const xmlChar * URL,
    							 const xmlChar * ID,
    							 const xmlChar * base)
    xmlParserCtxtPtr	xmlCreateFileParserCtxt	(const char * filename)
    xmlParserCtxtPtr	xmlCreateMemoryParserCtxt	(const char * buffer,
    							 int size)
    xmlParserCtxtPtr	xmlCreateURLParserCtxt	(const char * filename,
    						 int options)
    int	xmlCurrentChar			(xmlParserCtxtPtr ctxt,
    					 int * len)
    xmlChar *	xmlDecodeEntities	(xmlParserCtxtPtr ctxt,
    					 int len,
    					 int what,
    					 xmlChar end,
    					 xmlChar end2,
    					 xmlChar end3)
    Function type: xmlEntityReferenceFunc
    void	xmlEntityReferenceFunc		(xmlEntityPtr ent,
    					 xmlNodePtr firstNode,
    					 xmlNodePtr lastNode)
    void	xmlErrMemory			(xmlParserCtxtPtr ctxt,
    					 const char * extra)
    void	xmlFreeInputStream		(xmlParserInputPtr input)
    void	xmlHandleEntity			(xmlParserCtxtPtr ctxt,
    					 xmlEntityPtr entity)
    int	xmlIsLetter			(int c)
    xmlChar *	xmlNamespaceParseNCName	(xmlParserCtxtPtr ctxt)
    xmlChar *	xmlNamespaceParseNSDef	(xmlParserCtxtPtr ctxt)
    xmlChar *	xmlNamespaceParseQName	(xmlParserCtxtPtr ctxt,
    					 xmlChar ** prefix)
    xmlParserInputPtr	xmlNewEntityInputStream	(xmlParserCtxtPtr ctxt,
    						 xmlEntityPtr entity)
    xmlParserInputPtr	xmlNewInputFromFile	(xmlParserCtxtPtr ctxt,
    						 const char * filename)
    xmlParserInputPtr	xmlNewInputStream	(xmlParserCtxtPtr ctxt)
    xmlParserInputPtr	xmlNewStringInputStream	(xmlParserCtxtPtr ctxt,
    						 const xmlChar * buffer)
    void	xmlNextChar			(xmlParserCtxtPtr ctxt)
    xmlChar *	xmlParseAttValue	(xmlParserCtxtPtr ctxt)
    const xmlChar *	xmlParseAttribute	(xmlParserCtxtPtr ctxt,
    					 xmlChar ** value)
    void	xmlParseAttributeListDecl	(xmlParserCtxtPtr ctxt)
    int	xmlParseAttributeType		(xmlParserCtxtPtr ctxt,
    					 xmlEnumerationPtr * tree)
    void	xmlParseCDSect			(xmlParserCtxtPtr ctxt)
    void	xmlParseCharData		(xmlParserCtxtPtr ctxt,
    					 int cdata)
    int	xmlParseCharRef			(xmlParserCtxtPtr ctxt)
    void	xmlParseComment			(xmlParserCtxtPtr ctxt)
    void	xmlParseContent			(xmlParserCtxtPtr ctxt)
    int	xmlParseDefaultDecl		(xmlParserCtxtPtr ctxt,
    					 xmlChar ** value)
    void	xmlParseDocTypeDecl		(xmlParserCtxtPtr ctxt)
    void	xmlParseElement			(xmlParserCtxtPtr ctxt)
    xmlElementContentPtr	xmlParseElementChildrenContentDecl	(xmlParserCtxtPtr ctxt,
    							 int inputchk)
    int	xmlParseElementContentDecl	(xmlParserCtxtPtr ctxt,
    					 const xmlChar * name,
    					 xmlElementContentPtr * result)
    int	xmlParseElementDecl		(xmlParserCtxtPtr ctxt)
    xmlElementContentPtr	xmlParseElementMixedContentDecl	(xmlParserCtxtPtr ctxt,
    							 int inputchk)
    xmlChar *	xmlParseEncName		(xmlParserCtxtPtr ctxt)
    const xmlChar *	xmlParseEncodingDecl	(xmlParserCtxtPtr ctxt)
    void	xmlParseEndTag			(xmlParserCtxtPtr ctxt)
    void	xmlParseEntityDecl		(xmlParserCtxtPtr ctxt)
    xmlEntityPtr	xmlParseEntityRef	(xmlParserCtxtPtr ctxt)
    xmlChar *	xmlParseEntityValue	(xmlParserCtxtPtr ctxt,
    					 xmlChar ** orig)
    int	xmlParseEnumeratedType		(xmlParserCtxtPtr ctxt,
    					 xmlEnumerationPtr * tree)
    xmlEnumerationPtr	xmlParseEnumerationType	(xmlParserCtxtPtr ctxt)
    xmlChar *	xmlParseExternalID	(xmlParserCtxtPtr ctxt,
    					 xmlChar ** publicID,
    					 int strict)
    void	xmlParseExternalSubset		(xmlParserCtxtPtr ctxt,
    					 const xmlChar * ExternalID,
    					 const xmlChar * SystemID)
    void	xmlParseMarkupDecl		(xmlParserCtxtPtr ctxt)
    void	xmlParseMisc			(xmlParserCtxtPtr ctxt)
    const xmlChar *	xmlParseName		(xmlParserCtxtPtr ctxt)
    void	xmlParseNamespace		(xmlParserCtxtPtr ctxt)
    xmlChar *	xmlParseNmtoken		(xmlParserCtxtPtr ctxt)
    void	xmlParseNotationDecl		(xmlParserCtxtPtr ctxt)
    xmlEnumerationPtr	xmlParseNotationType	(xmlParserCtxtPtr ctxt)
    void	xmlParsePEReference		(xmlParserCtxtPtr ctxt)
    void	xmlParsePI			(xmlParserCtxtPtr ctxt)
    const xmlChar *	xmlParsePITarget	(xmlParserCtxtPtr ctxt)
    xmlChar *	xmlParsePubidLiteral	(xmlParserCtxtPtr ctxt)
    xmlChar *	xmlParseQuotedString	(xmlParserCtxtPtr ctxt)
    void	xmlParseReference		(xmlParserCtxtPtr ctxt)
    int	xmlParseSDDecl			(xmlParserCtxtPtr ctxt)
    const xmlChar *	xmlParseStartTag	(xmlParserCtxtPtr ctxt)
    xmlChar *	xmlParseSystemLiteral	(xmlParserCtxtPtr ctxt)
    void	xmlParseTextDecl		(xmlParserCtxtPtr ctxt)
    xmlChar *	xmlParseVersionInfo	(xmlParserCtxtPtr ctxt)
    xmlChar *	xmlParseVersionNum	(xmlParserCtxtPtr ctxt)
    void	xmlParseXMLDecl			(xmlParserCtxtPtr ctxt)
    void	xmlParserHandlePEReference	(xmlParserCtxtPtr ctxt)
    void	xmlParserHandleReference	(xmlParserCtxtPtr ctxt)
    void	xmlParserInputShrink		(xmlParserInputPtr in)
    xmlChar	xmlPopInput			(xmlParserCtxtPtr ctxt)
    void	xmlPushInput			(xmlParserCtxtPtr ctxt,
    					 xmlParserInputPtr input)
    xmlChar *	xmlScanName		(xmlParserCtxtPtr ctxt)
    void	xmlSetEntityReferenceFunc	(xmlEntityReferenceFunc func)
    int	xmlSkipBlankChars		(xmlParserCtxtPtr ctxt)
    xmlChar *	xmlSplitQName		(xmlParserCtxtPtr ctxt,
    					 const xmlChar * name,
    					 xmlChar ** prefix)
    int	xmlStringCurrentChar		(xmlParserCtxtPtr ctxt,
    					 const xmlChar * cur,
    					 int * len)
    xmlChar *	xmlStringDecodeEntities	(xmlParserCtxtPtr ctxt,
    					 const xmlChar * str,
    					 int what,
    					 xmlChar end,
    					 xmlChar end2,
    					 xmlChar end3)
    xmlChar *	xmlStringLenDecodeEntities	(xmlParserCtxtPtr ctxt,
    						 const xmlChar * str,
    						 int len,
    						 int what,
    						 xmlChar end,
    						 xmlChar end2,
    						 xmlChar end3)
    int	xmlSwitchEncoding		(xmlParserCtxtPtr ctxt,
    					 xmlCharEncoding enc)
    int	xmlSwitchInputEncoding		(xmlParserCtxtPtr ctxt,
    					 xmlParserInputPtr input,
    					 xmlCharEncodingHandlerPtr handler)
    int	xmlSwitchToEncoding		(xmlParserCtxtPtr ctxt,
    					 xmlCharEncodingHandlerPtr handler)
## Description ### Macro: INPUT_CHUNK
    #define INPUT_CHUNK
The parser tries to always have that amount of input ready. One of the point is providing context when reporting errors. ### Macro: IS_ASCII_DIGIT
    #define IS_ASCII_DIGIT
Macro to check [0-9] ### Macro: IS_ASCII_LETTER
    #define IS_ASCII_LETTER
Macro to check [a-zA-Z] ### Macro: IS_BASECHAR
    #define IS_BASECHAR
Macro to check the following production in the XML spec: [85] BaseChar ::= ... long list see REC ... ### Macro: IS_BLANK
    #define IS_BLANK
Macro to check the following production in the XML spec: [3] S ::= (#x20 | #x9 | #xD | #xA)+ ### Macro: IS_BLANK_CH
    #define IS_BLANK_CH
Behaviour same as IS_BLANK ### Macro: IS_BYTE_CHAR
    #define IS_BYTE_CHAR
Macro to check the following production in the XML spec: [2] Char ::= #x9 | #xA | #xD | [#x20...] any byte character in the accepted range ### Macro: IS_CHAR
    #define IS_CHAR
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. ### Macro: IS_CHAR_CH
    #define IS_CHAR_CH
Behaves like IS_CHAR on single-byte value ### Macro: IS_COMBINING
    #define IS_COMBINING
Macro to check the following production in the XML spec: [87] CombiningChar ::= ... long list see REC ... ### Macro: IS_COMBINING_CH
    #define IS_COMBINING_CH
Always false (all combining chars > 0xff) ### Macro: IS_DIGIT
    #define IS_DIGIT
Macro to check the following production in the XML spec: [88] Digit ::= ... long list see REC ... ### Macro: IS_DIGIT_CH
    #define IS_DIGIT_CH
Behaves like IS_DIGIT but with a single byte argument ### Macro: IS_EXTENDER
    #define IS_EXTENDER
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] ### Macro: IS_EXTENDER_CH
    #define IS_EXTENDER_CH
Behaves like IS_EXTENDER but with a single-byte argument ### Macro: IS_IDEOGRAPHIC
    #define IS_IDEOGRAPHIC
Macro to check the following production in the XML spec: [86] Ideographic ::= [#x4E00-#x9FA5] | #x3007 | [#x3021-#x3029] ### Macro: IS_LETTER
    #define IS_LETTER
Macro to check the following production in the XML spec: [84] Letter ::= BaseChar | Ideographic ### Macro: IS_LETTER_CH
    #define IS_LETTER_CH
Macro behaves like IS_LETTER, but only check base chars ### Macro: IS_PUBIDCHAR
    #define IS_PUBIDCHAR
Macro to check the following production in the XML spec: [13] PubidChar ::= #x20 | #xD | #xA | [a-zA-Z0-9] | [-'()+,./:=?;!*#@$_%] ### Macro: IS_PUBIDCHAR_CH
    #define IS_PUBIDCHAR_CH
Same as IS_PUBIDCHAR but for single-byte value ### Macro: MOVETO_ENDTAG
    #define MOVETO_ENDTAG
Skips to the next '>' char. ### Macro: MOVETO_STARTTAG
    #define MOVETO_STARTTAG
Skips to the next '<' char. ### Macro: SKIP_EOL
    #define SKIP_EOL
Skips the end of line chars. ### Macro: XML_MAX_NAMELEN
    #define XML_MAX_NAMELEN
Identifiers can be longer, but this will be more costly at runtime. ### Macro: XML_SUBSTITUTE_BOTH
    #define XML_SUBSTITUTE_BOTH
Both general and parameter entities need to be substituted. ### Macro: XML_SUBSTITUTE_NONE
    #define XML_SUBSTITUTE_NONE
If no entities need to be substituted. ### Macro: XML_SUBSTITUTE_PEREF
    #define XML_SUBSTITUTE_PEREF
Whether parameter entities need to be substituted. ### Macro: XML_SUBSTITUTE_REF
    #define XML_SUBSTITUTE_REF
Whether general entities need to be substituted. ### Function: htmlCreateFileParserCtxt
    htmlParserCtxtPtr	htmlCreateFileParserCtxt	(const char * filename,
    							 const char * encoding)
Create a parser context for a file content. Automatic support for ZLIB/Compress compressed document is provided by default if found at compile-time.
`filename`: | the filename
`encoding`: | a free form C string describing the HTML document encoding, or NULL
`Returns`: | the new parser context or NULL
### Function: htmlInitAutoClose
    void	htmlInitAutoClose		(void)
Initialize the htmlStartCloseIndex for fast lookup of closing tags names. This is not reentrant. Call xmlInitParser() once before processing in case of use in multithreaded programs. ### Function: inputPop
    xmlParserInputPtr	inputPop	(xmlParserCtxtPtr ctxt)
Pops the top parser input from the input stack
`ctxt`: | an XML parser context
`Returns`: | the input just removed
### Function: inputPush
    int	inputPush			(xmlParserCtxtPtr ctxt,
    					 xmlParserInputPtr value)
Pushes a new parser input on top of the input stack
`ctxt`: | an XML parser context
`value`: | the parser input
`Returns`: | 0 in case of error, the index in the stack otherwise
### Function: namePop
    const xmlChar *	namePop			(xmlParserCtxtPtr ctxt)
Pops the top element name from the name stack
`ctxt`: | an XML parser context
`Returns`: | the name just removed
### Function: namePush
    int	namePush			(xmlParserCtxtPtr ctxt,
    					 const xmlChar * value)
Pushes a new element name on top of the name stack
`ctxt`: | an XML parser context
`value`: | the element name
`Returns`: | -1 in case of error, the index in the stack otherwise
### Function: nodePop
    xmlNodePtr	nodePop			(xmlParserCtxtPtr ctxt)
Pops the top element node from the node stack
`ctxt`: | an XML parser context
`Returns`: | the node just removed
### Function: nodePush
    int	nodePush			(xmlParserCtxtPtr ctxt,
    					 xmlNodePtr value)
Pushes a new element node on top of the node stack
`ctxt`: | an XML parser context
`value`: | the element node
`Returns`: | 0 in case of error, the index in the stack otherwise
### Function: xmlCheckLanguageID
    int	xmlCheckLanguageID		(const xmlChar * lang)
Checks that the value conforms to the LanguageID production: NOTE: this is somewhat deprecated, those productions were removed from the XML Second edition. [33] LanguageID ::= Langcode ('-' Subcode)* [34] Langcode ::= ISO639Code | IanaCode | UserCode [35] ISO639Code ::= ([a-z] | [A-Z]) ([a-z] | [A-Z]) [36] IanaCode ::= ('i' | 'I') '-' ([a-z] | [A-Z])+ [37] UserCode ::= ('x' | 'X') '-' ([a-z] | [A-Z])+ [38] Subcode ::= ([a-z] | [A-Z])+
`lang`: | pointer to the string value
`Returns`: | 1 if correct 0 otherwise
### Function: xmlCopyChar
    int	xmlCopyChar			(int len,
    					 xmlChar * out,
    					 int val)
append the char value in the array
`len`: | Ignored, compatibility
`out`: | pointer to an array of xmlChar
`val`: | the char value
`Returns`: | the number of xmlChar written
### Function: xmlCopyCharMultiByte
    int	xmlCopyCharMultiByte		(xmlChar * out,
    					 int val)
append the char value in the array
`out`: | pointer to an array of xmlChar
`val`: | the char value
`Returns`: | the number of xmlChar written
### Function: xmlCreateEntityParserCtxt
    xmlParserCtxtPtr	xmlCreateEntityParserCtxt	(const xmlChar * URL,
    							 const xmlChar * ID,
    							 const xmlChar * base)
Create a parser context for an external entity Automatic support for ZLIB/Compress compressed document is provided by default if found at compile-time.
`URL`: | the entity URL
`ID`: | the entity PUBLIC ID
`base`: | a possible base for the target URI
`Returns`: | the new parser context or NULL
### Function: xmlCreateFileParserCtxt
    xmlParserCtxtPtr	xmlCreateFileParserCtxt	(const char * filename)
Create a parser context for a file content. Automatic support for ZLIB/Compress compressed document is provided by default if found at compile-time.
`filename`: | the filename
`Returns`: | the new parser context or NULL
### Function: xmlCreateMemoryParserCtxt
    xmlParserCtxtPtr	xmlCreateMemoryParserCtxt	(const char * buffer,
    							 int size)
Create a parser context for an XML in-memory document.
`buffer`: | a pointer to a char array
`size`: | the size of the array
`Returns`: | the new parser context or NULL
### Function: xmlCreateURLParserCtxt
    xmlParserCtxtPtr	xmlCreateURLParserCtxt	(const char * filename,
    						 int options)
Create a parser context for a file or URL content. Automatic support for ZLIB/Compress compressed document is provided by default if found at compile-time and for file accesses
`filename`: | the filename or URL
`options`: | a combination of xmlParserOption
`Returns`: | the new parser context or NULL
### Function: xmlCurrentChar
    int	xmlCurrentChar			(xmlParserCtxtPtr ctxt,
    					 int * len)
The current char value, if using UTF-8 this may actually span multiple bytes in the input buffer. Implement the end of line normalization: 2.11 End-of-Line Handling Wherever an external parsed entity or the literal entity value of an internal parsed entity contains either the literal two-character sequence "#xD#xA" or a standalone literal #xD, an XML processor must pass to the application the single character #xA. This behavior can conveniently be produced by normalizing all line breaks to #xA on input, before parsing.)
`ctxt`: | the XML parser context
`len`: | pointer to the length of the char read
`Returns`: | the current char value and its length
### Function: xmlDecodeEntities
    xmlChar *	xmlDecodeEntities	(xmlParserCtxtPtr ctxt,
    					 int len,
    					 int what,
    					 xmlChar end,
    					 xmlChar end2,
    					 xmlChar end3)
This function is deprecated, we now always process entities content through xmlStringDecodeEntities TODO: remove it in next major release. [67] Reference ::= EntityRef | CharRef [69] PEReference ::= '%' Name ';'
`ctxt`: | the parser context
`len`: | the len to decode (in bytes !), -1 for no size limit
`what`: | combination of XML_SUBSTITUTE_REF and XML_SUBSTITUTE_PEREF
`end`: | an end marker xmlChar, 0 if none
`end2`: | an end marker xmlChar, 0 if none
`end3`: | an end marker xmlChar, 0 if none
`Returns`: | A newly allocated string with the substitution done. The caller must deallocate it !
### Function type: xmlEntityReferenceFunc
    Function type: xmlEntityReferenceFunc
    void	xmlEntityReferenceFunc		(xmlEntityPtr ent,
    					 xmlNodePtr firstNode,
    					 xmlNodePtr lastNode)
Callback function used when one needs to be able to track back the provenance of a chunk of nodes inherited from an entity replacement.
`ent`: | the entity
`firstNode`: | the fist node in the chunk
`lastNode`: | the last nod in the chunk
### Function: xmlErrMemory
    void	xmlErrMemory			(xmlParserCtxtPtr ctxt,
    					 const char * extra)
Handle a redefinition of attribute error
`ctxt`: | an XML parser context
`extra`: | extra informations
### Function: xmlFreeInputStream
    void	xmlFreeInputStream		(xmlParserInputPtr input)
Free up an input stream.
`input`: | an xmlParserInputPtr
### Function: xmlHandleEntity
    void	xmlHandleEntity			(xmlParserCtxtPtr ctxt,
    					 xmlEntityPtr entity)
Default handling of defined entities, when should we define a new input stream ? When do we just handle that as a set of chars ? OBSOLETE: to be removed at some point.
`ctxt`: | an XML parser context
`entity`: | an XML entity pointer.
### Function: xmlIsLetter
    int	xmlIsLetter			(int c)
Check whether the character is allowed by the production [84] Letter ::= BaseChar | Ideographic
`c`: | an unicode character (int)
`Returns`: | 0 if not, non-zero otherwise
### Function: xmlNamespaceParseNCName
    xmlChar *	xmlNamespaceParseNCName	(xmlParserCtxtPtr ctxt)
parse an XML namespace name. TODO: this seems not in use anymore, the namespace handling is done on top of the SAX interfaces, i.e. not on raw input. [NS 3] NCName ::= (Letter | '_') (NCNameChar)* [NS 4] NCNameChar ::= Letter | Digit | '.' | '-' | '_' | CombiningChar | Extender
`ctxt`: | an XML parser context
`Returns`: | the namespace name or NULL
### Function: xmlNamespaceParseNSDef
    xmlChar *	xmlNamespaceParseNSDef	(xmlParserCtxtPtr ctxt)
parse a namespace prefix declaration TODO: this seems not in use anymore, the namespace handling is done on top of the SAX interfaces, i.e. not on raw input. [NS 1] NSDef ::= PrefixDef Eq SystemLiteral [NS 2] PrefixDef ::= 'xmlns' (':' NCName)?
`ctxt`: | an XML parser context
`Returns`: | the namespace name
### Function: xmlNamespaceParseQName
    xmlChar *	xmlNamespaceParseQName	(xmlParserCtxtPtr ctxt,
    					 xmlChar ** prefix)
TODO: this seems not in use anymore, the namespace handling is done on top of the SAX interfaces, i.e. not on raw input. parse an XML qualified name [NS 5] QName ::= (Prefix ':')? LocalPart [NS 6] Prefix ::= NCName [NS 7] LocalPart ::= NCName
`ctxt`: | an XML parser context
`prefix`: | a xmlChar **
`Returns`: | the local part, and prefix is updated to get the Prefix if any.
### Function: xmlNewEntityInputStream
    xmlParserInputPtr	xmlNewEntityInputStream	(xmlParserCtxtPtr ctxt,
    						 xmlEntityPtr entity)
Create a new input stream based on an xmlEntityPtr
`ctxt`: | an XML parser context
`entity`: | an Entity pointer
`Returns`: | the new input stream or NULL
### Function: xmlNewInputFromFile
    xmlParserInputPtr	xmlNewInputFromFile	(xmlParserCtxtPtr ctxt,
    						 const char * filename)
Create a new input stream based on a file or an URL.
`ctxt`: | an XML parser context
`filename`: | the filename to use as entity
`Returns`: | the new input stream or NULL in case of error
### Function: xmlNewInputStream
    xmlParserInputPtr	xmlNewInputStream	(xmlParserCtxtPtr ctxt)
Create a new input stream structure
`ctxt`: | an XML parser context
`Returns`: | the new input stream or NULL
### Function: xmlNewStringInputStream
    xmlParserInputPtr	xmlNewStringInputStream	(xmlParserCtxtPtr ctxt,
    						 const xmlChar * buffer)
Create a new input stream based on a memory buffer.
`ctxt`: | an XML parser context
`buffer`: | an memory buffer
`Returns`: | the new input stream
### Function: xmlNextChar
    void	xmlNextChar			(xmlParserCtxtPtr ctxt)
Skip to the next char input char.
`ctxt`: | the XML parser context
### Function: xmlParseAttValue
    xmlChar *	xmlParseAttValue	(xmlParserCtxtPtr ctxt)
parse a value for an attribute Note: the parser won't do substitution of entities here, this will be handled later in xmlStringGetNodeList [10] AttValue ::= '"' ([^<&"] | Reference)* '"' | "'" ([^<&'] | Reference)* "'" 3.3.3 Attribute-Value Normalization: Before the value of an attribute is passed to the application or checked for validity, the XML processor must normalize it as follows: - a character reference is processed by appending the referenced character to the attribute value - an entity reference is processed by recursively processing the replacement text of the entity - a whitespace character (#x20, #xD, #xA, #x9) is processed by appending #x20 to the normalized value, except that only a single #x20 is appended for a "#xD#xA" sequence that is part of an external parsed entity or the literal entity value of an internal parsed entity - other characters are processed by appending them to the normalized value If the declared value is not CDATA, then the XML processor must further process the normalized attribute value by discarding any leading and trailing space (#x20) characters, and by replacing sequences of space (#x20) characters by a single space (#x20) character. All attributes for which no declaration has been read should be treated by a non-validating parser as if declared CDATA.
`ctxt`: | an XML parser context
`Returns`: | the AttValue parsed or NULL. The value has to be freed by the caller.
### Function: xmlParseAttribute
    const xmlChar *	xmlParseAttribute	(xmlParserCtxtPtr ctxt,
    					 xmlChar ** value)
parse an attribute [41] Attribute ::= Name Eq AttValue [ WFC: No External Entity References ] Attribute values cannot contain direct or indirect entity references to external entities. [ WFC: No < in Attribute Values ] The replacement text of any entity referred to directly or indirectly in an attribute value (other than "&lt;") must not contain a <. [ VC: Attribute Value Type ] The attribute must have been declared; the value must be of the type declared for it. [25] Eq ::= S? '=' S? With namespace: [NS 11] Attribute ::= QName Eq AttValue Also the case QName == xmlns:??? is handled independently as a namespace definition.
`ctxt`: | an XML parser context
`value`: | a xmlChar ** used to store the value of the attribute
`Returns`: | the attribute name, and the value in *value.
### Function: xmlParseAttributeListDecl
    void	xmlParseAttributeListDecl	(xmlParserCtxtPtr ctxt)
: parse the Attribute list def for an element [52] AttlistDecl ::= '<!ATTLIST' S Name AttDef* S? '>' [53] AttDef ::= S Name S AttType S DefaultDecl
`ctxt`: | an XML parser context
### Function: xmlParseAttributeType
    int	xmlParseAttributeType		(xmlParserCtxtPtr ctxt,
    					 xmlEnumerationPtr * tree)
parse the Attribute list def for an element [54] AttType ::= StringType | TokenizedType | EnumeratedType [55] StringType ::= 'CDATA' [56] TokenizedType ::= 'ID' | 'IDREF' | 'IDREFS' | 'ENTITY' | 'ENTITIES' | 'NMTOKEN' | 'NMTOKENS' Validity constraints for attribute values syntax are checked in xmlValidateAttributeValue() [ VC: ID ] Values of type ID must match the Name production. A name must not appear more than once in an XML document as a value of this type; i.e., ID values must uniquely identify the elements which bear them. [ VC: One ID per Element Type ] No element type may have more than one ID attribute specified. [ VC: ID Attribute Default ] An ID attribute must have a declared default of #IMPLIED or #REQUIRED. [ VC: IDREF ] Values of type IDREF must match the Name production, and values of type IDREFS must match Names; each IDREF Name must match the value of an ID attribute on some element in the XML document; i.e. IDREF values must match the value of some ID attribute. [ VC: Entity Name ] Values of type ENTITY must match the Name production, values of type ENTITIES must match Names; each Entity Name must match the name of an unparsed entity declared in the DTD. [ VC: Name Token ] Values of type NMTOKEN must match the Nmtoken production; values of type NMTOKENS must match Nmtokens.
`ctxt`: | an XML parser context
`tree`: | the enumeration tree built while parsing
`Returns`: | the attribute type
### Function: xmlParseCDSect
    void	xmlParseCDSect			(xmlParserCtxtPtr ctxt)
Parse escaped pure raw content. [18] CDSect ::= CDStart CData CDEnd [19] CDStart ::= '<![CDATA[' [20] Data ::= (Char* - (Char* ']]>' Char*)) [21] CDEnd ::= ']]>'
`ctxt`: | an XML parser context
### Function: xmlParseCharData
    void	xmlParseCharData		(xmlParserCtxtPtr ctxt,
    					 int cdata)
parse a CharData section. if we are within a CDATA section ']]>' marks an end of section. The right angle bracket (>) may be represented using the string "&gt;", and must, for compatibility, be escaped using "&gt;" or a character reference when it appears in the string "]]>" in content, when that string is not marking the end of a CDATA section. [14] CharData ::= [^<&]* - ([^<&]* ']]>' [^<&]*)
`ctxt`: | an XML parser context
`cdata`: | int indicating whether we are within a CDATA section
### Function: xmlParseCharRef
    int	xmlParseCharRef			(xmlParserCtxtPtr ctxt)
parse Reference declarations [66] CharRef ::= '&#' [0-9]+ ';' | '&#x' [0-9a-fA-F]+ ';' [ WFC: Legal Character ] Characters referred to using character references must match the production for Char.
`ctxt`: | an XML parser context
`Returns`: | the value parsed (as an int), 0 in case of error
### Function: xmlParseComment
    void	xmlParseComment			(xmlParserCtxtPtr ctxt)
Skip an XML (SGML) comment <!-- .... --> The spec says that "For compatibility, the string "--" (double-hyphen) must not occur within comments. " [15] Comment ::= '<!--' ((Char - '-') | ('-' (Char - '-')))* '-->'
`ctxt`: | an XML parser context
### Function: xmlParseContent
    void	xmlParseContent			(xmlParserCtxtPtr ctxt)
Parse a content: [43] content ::= (element | CharData | Reference | CDSect | PI | Comment)*
`ctxt`: | an XML parser context
### Function: xmlParseDefaultDecl
    int	xmlParseDefaultDecl		(xmlParserCtxtPtr ctxt,
    					 xmlChar ** value)
Parse an attribute default declaration [60] DefaultDecl ::= '#REQUIRED' | '#IMPLIED' | (('#FIXED' S)? AttValue) [ VC: Required Attribute ] if the default declaration is the keyword #REQUIRED, then the attribute must be specified for all elements of the type in the attribute-list declaration. [ VC: Attribute Default Legal ] The declared default value must meet the lexical constraints of the declared attribute type c.f. xmlValidateAttributeDecl() [ VC: Fixed Attribute Default ] if an attribute has a default value declared with the #FIXED keyword, instances of that attribute must match the default value. [ WFC: No < in Attribute Values ] handled in xmlParseAttValue()
`ctxt`: | an XML parser context
`value`: | Receive a possible fixed default value for the attribute
`Returns`: | XML_ATTRIBUTE_NONE, XML_ATTRIBUTE_REQUIRED, XML_ATTRIBUTE_IMPLIED or XML_ATTRIBUTE_FIXED.
### Function: xmlParseDocTypeDecl
    void	xmlParseDocTypeDecl		(xmlParserCtxtPtr ctxt)
parse a DOCTYPE declaration [28] doctypedecl ::= '<!DOCTYPE' S Name (S ExternalID)? S? ('[' (markupdecl | PEReference | S)* ']' S?)? '>' [ VC: Root Element Type ] The Name in the document type declaration must match the element type of the root element.
`ctxt`: | an XML parser context
### Function: xmlParseElement
    void	xmlParseElement			(xmlParserCtxtPtr ctxt)
parse an XML element, this is highly recursive [39] element ::= EmptyElemTag | STag content ETag [ WFC: Element Type Match ] The Name in an element's end-tag must match the element type in the start-tag.
`ctxt`: | an XML parser context
### Function: xmlParseElementChildrenContentDecl
    xmlElementContentPtr	xmlParseElementChildrenContentDecl	(xmlParserCtxtPtr ctxt,
    							 int inputchk)
parse the declaration for a Mixed Element content The leading '(' and spaces have been skipped in xmlParseElementContentDecl [47] children ::= (choice | seq) ('?' | '*' | '+')? [48] cp ::= (Name | choice | seq) ('?' | '*' | '+')? [49] choice ::= '(' S? cp ( S? '|' S? cp )* S? ')' [50] seq ::= '(' S? cp ( S? ',' S? cp )* S? ')' [ VC: Proper Group/PE Nesting ] applies to [49] and [50] TODO Parameter-entity replacement text must be properly nested with parenthesized groups. That is to say, if either of the opening or closing parentheses in a choice, seq, or Mixed construct is contained in the replacement text for a parameter entity, both must be contained in the same replacement text. For interoperability, if a parameter-entity reference appears in a choice, seq, or Mixed construct, its replacement text should not be empty, and neither the first nor last non-blank character of the replacement text should be a connector (| or ,).
`ctxt`: | an XML parser context
`inputchk`: | the input used for the current entity, needed for boundary checks
`Returns`: | the tree of xmlElementContentPtr describing the element hierarchy.
### Function: xmlParseElementContentDecl
    int	xmlParseElementContentDecl	(xmlParserCtxtPtr ctxt,
    					 const xmlChar * name,
    					 xmlElementContentPtr * result)
parse the declaration for an Element content either Mixed or Children, the cases EMPTY and ANY are handled directly in xmlParseElementDecl [46] contentspec ::= 'EMPTY' | 'ANY' | Mixed | children
`ctxt`: | an XML parser context
`name`: | the name of the element being defined.
`result`: | the Element Content pointer will be stored here if any
`Returns`: | the type of element content XML_ELEMENT_TYPE_xxx
### Function: xmlParseElementDecl
    int	xmlParseElementDecl		(xmlParserCtxtPtr ctxt)
parse an Element declaration. [45] elementdecl ::= '<!ELEMENT' S Name S contentspec S? '>' [ VC: Unique Element Type Declaration ] No element type may be declared more than once
`ctxt`: | an XML parser context
`Returns`: | the type of the element, or -1 in case of error
### Function: xmlParseElementMixedContentDecl
    xmlElementContentPtr	xmlParseElementMixedContentDecl	(xmlParserCtxtPtr ctxt,
    							 int inputchk)
parse the declaration for a Mixed Element content The leading '(' and spaces have been skipped in xmlParseElementContentDecl [51] Mixed ::= '(' S? '#PCDATA' (S? '|' S? Name)* S? ')*' | '(' S? '#PCDATA' S? ')' [ VC: Proper Group/PE Nesting ] applies to [51] too (see [49]) [ VC: No Duplicate Types ] The same name must not appear more than once in a single mixed-content declaration.
`ctxt`: | an XML parser context
`inputchk`: | the input used for the current entity, needed for boundary checks
`Returns`: | the list of the xmlElementContentPtr describing the element choices
### Function: xmlParseEncName
    xmlChar *	xmlParseEncName		(xmlParserCtxtPtr ctxt)
parse the XML encoding name [81] EncName ::= [A-Za-z] ([A-Za-z0-9._] | '-')*
`ctxt`: | an XML parser context
`Returns`: | the encoding name value or NULL
### Function: xmlParseEncodingDecl
    const xmlChar *	xmlParseEncodingDecl	(xmlParserCtxtPtr ctxt)
parse the XML encoding declaration [80] EncodingDecl ::= S 'encoding' Eq ('"' EncName '"' | "'" EncName "'") this setups the conversion filters.
`ctxt`: | an XML parser context
`Returns`: | the encoding value or NULL
### Function: xmlParseEndTag
    void	xmlParseEndTag			(xmlParserCtxtPtr ctxt)
parse an end of tag [42] ETag ::= '</' Name S? '>' With namespace [NS 9] ETag ::= '</' QName S? '>'
`ctxt`: | an XML parser context
### Function: xmlParseEntityDecl
    void	xmlParseEntityDecl		(xmlParserCtxtPtr ctxt)
parse <!ENTITY declarations [70] EntityDecl ::= GEDecl | PEDecl [71] GEDecl ::= '<!ENTITY' S Name S EntityDef S? '>' [72] PEDecl ::= '<!ENTITY' S '%' S Name S PEDef S? '>' [73] EntityDef ::= EntityValue | (ExternalID NDataDecl?) [74] PEDef ::= EntityValue | ExternalID [76] NDataDecl ::= S 'NDATA' S Name [ VC: Notation Declared ] The Name must match the declared name of a notation.
`ctxt`: | an XML parser context
### Function: xmlParseEntityRef
    xmlEntityPtr	xmlParseEntityRef	(xmlParserCtxtPtr ctxt)
parse ENTITY references declarations [68] EntityRef ::= '&' Name ';' [ WFC: Entity Declared ] In a document without any DTD, a document with only an internal DTD subset which contains no parameter entity references, or a document with "standalone='yes'", the Name given in the entity reference must match that in an entity declaration, except that well-formed documents need not declare any of the following entities: amp, lt, gt, apos, quot. The declaration of a parameter entity must precede any reference to it. Similarly, the declaration of a general entity must precede any reference to it which appears in a default value in an attribute-list declaration. Note that if entities are declared in the external subset or in external parameter entities, a non-validating processor is not obligated to read and process their declarations; for such documents, the rule that an entity must be declared is a well-formedness constraint only if standalone='yes'. [ WFC: Parsed Entity ] An entity reference must not contain the name of an unparsed entity
`ctxt`: | an XML parser context
`Returns`: | the xmlEntityPtr if found, or NULL otherwise.
### Function: xmlParseEntityValue
    xmlChar *	xmlParseEntityValue	(xmlParserCtxtPtr ctxt,
    					 xmlChar ** orig)
parse a value for ENTITY declarations [9] EntityValue ::= '"' ([^%&"] | PEReference | Reference)* '"' | "'" ([^%&'] | PEReference | Reference)* "'"
`ctxt`: | an XML parser context
`orig`: | if non-NULL store a copy of the original entity value
`Returns`: | the EntityValue parsed with reference substituted or NULL
### Function: xmlParseEnumeratedType
    int	xmlParseEnumeratedType		(xmlParserCtxtPtr ctxt,
    					 xmlEnumerationPtr * tree)
parse an Enumerated attribute type. [57] EnumeratedType ::= NotationType | Enumeration [58] NotationType ::= 'NOTATION' S '(' S? Name (S? '|' S? Name)* S? ')'
`ctxt`: | an XML parser context
`tree`: | the enumeration tree built while parsing
`Returns`: | XML_ATTRIBUTE_ENUMERATION or XML_ATTRIBUTE_NOTATION
### Function: xmlParseEnumerationType
    xmlEnumerationPtr	xmlParseEnumerationType	(xmlParserCtxtPtr ctxt)
parse an Enumeration attribute type. [59] Enumeration ::= '(' S? Nmtoken (S? '|' S? Nmtoken)* S? ')' [ VC: Enumeration ] Values of this type must match one of the Nmtoken tokens in the declaration
`ctxt`: | an XML parser context
`Returns`: | the enumeration attribute tree built while parsing
### Function: xmlParseExternalID
    xmlChar *	xmlParseExternalID	(xmlParserCtxtPtr ctxt,
    					 xmlChar ** publicID,
    					 int strict)
Parse an External ID or a Public ID NOTE: Productions [75] and [83] interact badly since [75] can generate 'PUBLIC' S PubidLiteral S SystemLiteral [75] ExternalID ::= 'SYSTEM' S SystemLiteral | 'PUBLIC' S PubidLiteral S SystemLiteral [83] PublicID ::= 'PUBLIC' S PubidLiteral
`ctxt`: | an XML parser context
`publicID`: | a xmlChar** receiving PubidLiteral
`strict`: | indicate whether we should restrict parsing to only production [75], see NOTE below
`Returns`: | the function returns SystemLiteral and in the second case publicID receives PubidLiteral, is strict is off it is possible to return NULL and have publicID set.
### Function: xmlParseExternalSubset
    void	xmlParseExternalSubset		(xmlParserCtxtPtr ctxt,
    					 const xmlChar * ExternalID,
    					 const xmlChar * SystemID)
parse Markup declarations from an external subset [30] extSubset ::= textDecl? extSubsetDecl [31] extSubsetDecl ::= (markupdecl | conditionalSect | PEReference | S) *
`ctxt`: | an XML parser context
`ExternalID`: | the external identifier
`SystemID`: | the system identifier (or URL)
### Function: xmlParseMarkupDecl
    void	xmlParseMarkupDecl		(xmlParserCtxtPtr ctxt)
parse Markup declarations [29] markupdecl ::= elementdecl | AttlistDecl | EntityDecl | NotationDecl | PI | Comment [ VC: Proper Declaration/PE Nesting ] Parameter-entity replacement text must be properly nested with markup declarations. That is to say, if either the first character or the last character of a markup declaration (markupdecl above) is contained in the replacement text for a parameter-entity reference, both must be contained in the same replacement text. [ WFC: PEs in Internal Subset ] In the internal DTD subset, parameter-entity references can occur only where markup declarations can occur, not within markup declarations. (This does not apply to references that occur in external parameter entities or to the external subset.)
`ctxt`: | an XML parser context
### Function: xmlParseMisc
    void	xmlParseMisc			(xmlParserCtxtPtr ctxt)
parse an XML Misc* optional field. [27] Misc ::= Comment | PI | S
`ctxt`: | an XML parser context
### Function: xmlParseName
    const xmlChar *	xmlParseName		(xmlParserCtxtPtr ctxt)
parse an XML name. [4] NameChar ::= Letter | Digit | '.' | '-' | '_' | ':' | CombiningChar | Extender [5] Name ::= (Letter | '_' | ':') (NameChar)* [6] Names ::= Name (#x20 Name)*
`ctxt`: | an XML parser context
`Returns`: | the Name parsed or NULL
### Function: xmlParseNamespace
    void	xmlParseNamespace		(xmlParserCtxtPtr ctxt)
xmlParseNamespace: parse specific PI '<?namespace ...' constructs. This is what the older xml-name Working Draft specified, a bunch of other stuff may still rely on it, so support is still here as if it was declared on the root of the Tree:-( TODO: remove from library To be removed at next drop of binary compatibility
`ctxt`: | an XML parser context
### Function: xmlParseNmtoken
    xmlChar *	xmlParseNmtoken		(xmlParserCtxtPtr ctxt)
parse an XML Nmtoken. [7] Nmtoken ::= (NameChar)+ [8] Nmtokens ::= Nmtoken (#x20 Nmtoken)*
`ctxt`: | an XML parser context
`Returns`: | the Nmtoken parsed or NULL
### Function: xmlParseNotationDecl
    void	xmlParseNotationDecl		(xmlParserCtxtPtr ctxt)
parse a notation declaration [82] NotationDecl ::= '<!NOTATION' S Name S (ExternalID | PublicID) S? '>' Hence there is actually 3 choices: 'PUBLIC' S PubidLiteral 'PUBLIC' S PubidLiteral S SystemLiteral and 'SYSTEM' S SystemLiteral See the NOTE on xmlParseExternalID().
`ctxt`: | an XML parser context
### Function: xmlParseNotationType
    xmlEnumerationPtr	xmlParseNotationType	(xmlParserCtxtPtr ctxt)
parse an Notation attribute type. Note: the leading 'NOTATION' S part has already being parsed... [58] NotationType ::= 'NOTATION' S '(' S? Name (S? '|' S? Name)* S? ')' [ VC: Notation Attributes ] Values of this type must match one of the notation names included in the declaration; all notation names in the declaration must be declared.
`ctxt`: | an XML parser context
`Returns`: | the notation attribute tree built while parsing
### Function: xmlParsePEReference
    void	xmlParsePEReference		(xmlParserCtxtPtr ctxt)
parse PEReference declarations The entity content is handled directly by pushing it's content as a new input stream. [69] PEReference ::= '%' Name ';' [ WFC: No Recursion ] A parsed entity must not contain a recursive reference to itself, either directly or indirectly. [ WFC: Entity Declared ] In a document without any DTD, a document with only an internal DTD subset which contains no parameter entity references, or a document with "standalone='yes'", ... ... The declaration of a parameter entity must precede any reference to it... [ VC: Entity Declared ] In a document with an external subset or external parameter entities with "standalone='no'", ... ... The declaration of a parameter entity must precede any reference to it... [ WFC: In DTD ] Parameter-entity references may only appear in the DTD. NOTE: misleading but this is handled.
`ctxt`: | an XML parser context
### Function: xmlParsePI
    void	xmlParsePI			(xmlParserCtxtPtr ctxt)
parse an XML Processing Instruction. [16] PI ::= '<?' PITarget (S (Char* - (Char* '?>' Char*)))? '?>' The processing is transfered to SAX once parsed.
`ctxt`: | an XML parser context
### Function: xmlParsePITarget
    const xmlChar *	xmlParsePITarget	(xmlParserCtxtPtr ctxt)
parse the name of a PI [17] PITarget ::= Name - (('X' | 'x') ('M' | 'm') ('L' | 'l'))
`ctxt`: | an XML parser context
`Returns`: | the PITarget name or NULL
### Function: xmlParsePubidLiteral
    xmlChar *	xmlParsePubidLiteral	(xmlParserCtxtPtr ctxt)
parse an XML public literal [12] PubidLiteral ::= '"' PubidChar* '"' | "'" (PubidChar - "'")* "'"
`ctxt`: | an XML parser context
`Returns`: | the PubidLiteral parsed or NULL.
### Function: xmlParseQuotedString
    xmlChar *	xmlParseQuotedString	(xmlParserCtxtPtr ctxt)
Parse and return a string between quotes or doublequotes TODO: Deprecated, to be removed at next drop of binary compatibility
`ctxt`: | an XML parser context
`Returns`: | the string parser or NULL.
### Function: xmlParseReference
    void	xmlParseReference		(xmlParserCtxtPtr ctxt)
parse and handle entity references in content, depending on the SAX interface, this may end-up in a call to character() if this is a CharRef, a predefined entity, if there is no reference() callback. or if the parser was asked to switch to that mode. [67] Reference ::= EntityRef | CharRef
`ctxt`: | an XML parser context
### Function: xmlParseSDDecl
    int	xmlParseSDDecl			(xmlParserCtxtPtr ctxt)
parse the XML standalone declaration [32] SDDecl ::= S 'standalone' Eq (("'" ('yes' | 'no') "'") | ('"' ('yes' | 'no')'"')) [ VC: Standalone Document Declaration ] TODO The standalone document declaration must have the value "no" if any external markup declarations contain declarations of: - attributes with default values, if elements to which these attributes apply appear in the document without specifications of values for these attributes, or - entities (other than amp, lt, gt, apos, quot), if references to those entities appear in the document, or - attributes with values subject to normalization, where the attribute appears in the document with a value which will change as a result of normalization, or - element types with element content, if white space occurs directly within any instance of those types.
`ctxt`: | an XML parser context
`Returns`: | 1 if standalone, 0 otherwise
### Function: xmlParseStartTag
    const xmlChar *	xmlParseStartTag	(xmlParserCtxtPtr ctxt)
parse a start of tag either for rule element or EmptyElement. In both case we don't parse the tag closing chars. [40] STag ::= '<' Name (S Attribute)* S? '>' [ WFC: Unique Att Spec ] No attribute name may appear more than once in the same start-tag or empty-element tag. [44] EmptyElemTag ::= '<' Name (S Attribute)* S? '/>' [ WFC: Unique Att Spec ] No attribute name may appear more than once in the same start-tag or empty-element tag. With namespace: [NS 8] STag ::= '<' QName (S Attribute)* S? '>' [NS 10] EmptyElement ::= '<' QName (S Attribute)* S? '/>'
`ctxt`: | an XML parser context
`Returns`: | the element name parsed
### Function: xmlParseSystemLiteral
    xmlChar *	xmlParseSystemLiteral	(xmlParserCtxtPtr ctxt)
parse an XML Literal [11] SystemLiteral ::= ('"' [^"]* '"') | ("'" [^']* "'")
`ctxt`: | an XML parser context
`Returns`: | the SystemLiteral parsed or NULL
### Function: xmlParseTextDecl
    void	xmlParseTextDecl		(xmlParserCtxtPtr ctxt)
parse an XML declaration header for external entities [77] TextDecl ::= '<?xml' VersionInfo? EncodingDecl S? '?>' Question: Seems that EncodingDecl is mandatory ? Is that a typo ?
`ctxt`: | an XML parser context
### Function: xmlParseVersionInfo
    xmlChar *	xmlParseVersionInfo	(xmlParserCtxtPtr ctxt)
parse the XML version. [24] VersionInfo ::= S 'version' Eq (' VersionNum ' | " VersionNum ") [25] Eq ::= S? '=' S?
`ctxt`: | an XML parser context
`Returns`: | the version string, e.g. "1.0"
### Function: xmlParseVersionNum
    xmlChar *	xmlParseVersionNum	(xmlParserCtxtPtr ctxt)
parse the XML version value. [26] VersionNum ::= ([a-zA-Z0-9_.:] | '-')+
`ctxt`: | an XML parser context
`Returns`: | the string giving the XML version number, or NULL
### Function: xmlParseXMLDecl
    void	xmlParseXMLDecl			(xmlParserCtxtPtr ctxt)
parse an XML declaration header [23] XMLDecl ::= '<?xml' VersionInfo EncodingDecl? SDDecl? S? '?>'
`ctxt`: | an XML parser context
### Function: xmlParserHandlePEReference
    void	xmlParserHandlePEReference	(xmlParserCtxtPtr ctxt)
[69] PEReference ::= '%' Name ';' [ WFC: No Recursion ] A parsed entity must not contain a recursive reference to itself, either directly or indirectly. [ WFC: Entity Declared ] In a document without any DTD, a document with only an internal DTD subset which contains no parameter entity references, or a document with "standalone='yes'", ... ... The declaration of a parameter entity must precede any reference to it... [ VC: Entity Declared ] In a document with an external subset or external parameter entities with "standalone='no'", ... ... The declaration of a parameter entity must precede any reference to it... [ WFC: In DTD ] Parameter-entity references may only appear in the DTD. NOTE: misleading but this is handled. A PEReference may have been detected in the current input stream the handling is done accordingly to http://www.w3.org/TR/REC-xml#entproc i.e. - Included in literal in entity values - Included as Parameter Entity reference within DTDs
`ctxt`: | the parser context
### Function: xmlParserHandleReference
    void	xmlParserHandleReference	(xmlParserCtxtPtr ctxt)
TODO: Remove, now deprecated ... the test is done directly in the content parsing routines. [67] Reference ::= EntityRef | CharRef [68] EntityRef ::= '&' Name ';' [ WFC: Entity Declared ] the Name given in the entity reference must match that in an entity declaration, except that well-formed documents need not declare any of the following entities: amp, lt, gt, apos, quot. [ WFC: Parsed Entity ] An entity reference must not contain the name of an unparsed entity [66] CharRef ::= '&#' [0-9]+ ';' | '&#x' [0-9a-fA-F]+ ';' A PEReference may have been detected in the current input stream the handling is done accordingly to http://www.w3.org/TR/REC-xml#entproc
`ctxt`: | the parser context
### Function: xmlParserInputShrink
    void	xmlParserInputShrink		(xmlParserInputPtr in)
This function removes used input for the parser.
`in`: | an XML parser input
### Function: xmlPopInput
    xmlChar	xmlPopInput			(xmlParserCtxtPtr ctxt)
xmlPopInput: the current input pointed by ctxt->input came to an end pop it and return the next char.
`ctxt`: | an XML parser context
`Returns`: | the current xmlChar in the parser context
### Function: xmlPushInput
    void	xmlPushInput			(xmlParserCtxtPtr ctxt,
    					 xmlParserInputPtr input)
xmlPushInput: switch to a new input stream which is stacked on top of the previous one(s).
`ctxt`: | an XML parser context
`input`: | an XML parser input fragment (entity, XML fragment ...).
### Function: xmlScanName
    xmlChar *	xmlScanName		(xmlParserCtxtPtr ctxt)
Trickery: parse an XML name but without consuming the input flow Needed for rollback cases. Used only when parsing entities references. TODO: seems deprecated now, only used in the default part of xmlParserHandleReference [4] NameChar ::= Letter | Digit | '.' | '-' | '_' | ':' | CombiningChar | Extender [5] Name ::= (Letter | '_' | ':') (NameChar)* [6] Names ::= Name (S Name)*
`ctxt`: | an XML parser context
`Returns`: | the Name parsed or NULL
### Function: xmlSetEntityReferenceFunc
    void	xmlSetEntityReferenceFunc	(xmlEntityReferenceFunc func)
Set the function to call call back when a xml reference has been made
`func`: | A valid function
### Function: xmlSkipBlankChars
    int	xmlSkipBlankChars		(xmlParserCtxtPtr ctxt)
skip all blanks character found at that point in the input streams. It pops up finished entities in the process if allowable at that point.
`ctxt`: | the XML parser context
`Returns`: | the number of space chars skipped
### Function: xmlSplitQName
    xmlChar *	xmlSplitQName		(xmlParserCtxtPtr ctxt,
    					 const xmlChar * name,
    					 xmlChar ** prefix)
parse an UTF8 encoded XML qualified name string [NS 5] QName ::= (Prefix ':')? LocalPart [NS 6] Prefix ::= NCName [NS 7] LocalPart ::= NCName
`ctxt`: | an XML parser context
`name`: | an XML parser context
`prefix`: | a xmlChar **
`Returns`: | the local part, and prefix is updated to get the Prefix if any.
### Function: xmlStringCurrentChar
    int	xmlStringCurrentChar		(xmlParserCtxtPtr ctxt,
    					 const xmlChar * cur,
    					 int * len)
The current char value, if using UTF-8 this may actually span multiple bytes in the input buffer.
`ctxt`: | the XML parser context
`cur`: | pointer to the beginning of the char
`len`: | pointer to the length of the char read
`Returns`: | the current char value and its length
### Function: xmlStringDecodeEntities
    xmlChar *	xmlStringDecodeEntities	(xmlParserCtxtPtr ctxt,
    					 const xmlChar * str,
    					 int what,
    					 xmlChar end,
    					 xmlChar end2,
    					 xmlChar end3)
Takes a entity string content and process to do the adequate substitutions. [67] Reference ::= EntityRef | CharRef [69] PEReference ::= '%' Name ';'
`ctxt`: | the parser context
`str`: | the input string
`what`: | combination of XML_SUBSTITUTE_REF and XML_SUBSTITUTE_PEREF
`end`: | an end marker xmlChar, 0 if none
`end2`: | an end marker xmlChar, 0 if none
`end3`: | an end marker xmlChar, 0 if none
`Returns`: | A newly allocated string with the substitution done. The caller must deallocate it !
### Function: xmlStringLenDecodeEntities
    xmlChar *	xmlStringLenDecodeEntities	(xmlParserCtxtPtr ctxt,
    						 const xmlChar * str,
    						 int len,
    						 int what,
    						 xmlChar end,
    						 xmlChar end2,
    						 xmlChar end3)
Takes a entity string content and process to do the adequate substitutions. [67] Reference ::= EntityRef | CharRef [69] PEReference ::= '%' Name ';'
`ctxt`: | the parser context
`str`: | the input string
`len`: | the string length
`what`: | combination of XML_SUBSTITUTE_REF and XML_SUBSTITUTE_PEREF
`end`: | an end marker xmlChar, 0 if none
`end2`: | an end marker xmlChar, 0 if none
`end3`: | an end marker xmlChar, 0 if none
`Returns`: | A newly allocated string with the substitution done. The caller must deallocate it !
### Function: xmlSwitchEncoding
    int	xmlSwitchEncoding		(xmlParserCtxtPtr ctxt,
    					 xmlCharEncoding enc)
change the input functions when discovering the character encoding of a given entity.
`ctxt`: | the parser context
`enc`: | the encoding value (number)
`Returns`: | 0 in case of success, -1 otherwise
### Function: xmlSwitchInputEncoding
    int	xmlSwitchInputEncoding		(xmlParserCtxtPtr ctxt,
    					 xmlParserInputPtr input,
    					 xmlCharEncodingHandlerPtr handler)
change the input functions when discovering the character encoding of a given entity.
`ctxt`: | the parser context
`input`: | the input stream
`handler`: | the encoding handler
`Returns`: | 0 in case of success, -1 otherwise
### Function: xmlSwitchToEncoding
    int	xmlSwitchToEncoding		(xmlParserCtxtPtr ctxt,
    					 xmlCharEncodingHandlerPtr handler)
change the input functions when discovering the character encoding of a given entity.
`ctxt`: | the parser context
`handler`: | the encoding handler
`Returns`: | 0 in case of success, -1 otherwise
Daniel Veillard