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676 lines
30 KiB
Plaintext
676 lines
30 KiB
Plaintext
* Summary: XML Path Language implementation
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* Description: API for the XML Path Language implementation
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*
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* XML Path Language implementation
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* XPath is a language for addressing parts of an XML document,
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* designed to be used by both XSLT and XPointer
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* http://www.w3.org/TR/xpath
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*
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* Implements
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* W3C Recommendation 16 November 1999
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* http://www.w3.org/TR/1999/REC-xpath-19991116
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*
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* Copy: See Copyright for the status of this software.
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*
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* Author: Patrick Monnerat <pm@datasphere.ch>, DATASPHERE S.A.
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/if not defined(XML_XPATH_H__)
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/define XML_XPATH_H__
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/include "libxmlrpg/xmlversion"
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/if defined(LIBXML_XPATH_ENABLED)
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/include "libxmlrpg/xmlTypesC"
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/include "libxmlrpg/xmlerror"
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/include "libxmlrpg/tree"
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/include "libxmlrpg/hash"
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/endif LIBXML_XPATH_ENABLED
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/if defined(LIBXML_XPATH_ENABLED)
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d xmlXPathContextPtr...
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d s * based(######typedef######)
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d xmlXPathParserContextPtr...
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d s * based(######typedef######)
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* The set of XPath error codes.
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d xmlXPathError s based(######typedef######)
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d like(xmlCenum)
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d XPATH_EXPRESSION_OK...
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d c 0
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d XPATH_NUMBER_ERROR...
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d c 1
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d XPATH_UNFINISHED_LITERAL_ERROR...
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d c 2
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d XPATH_START_LITERAL_ERROR...
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d c 3
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d XPATH_VARIABLE_REF_ERROR...
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d c 4
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d XPATH_UNDEF_VARIABLE_ERROR...
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d c 5
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d XPATH_INVALID_PREDICATE_ERROR...
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d c 6
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d XPATH_EXPR_ERROR...
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d c 7
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d XPATH_UNCLOSED_ERROR...
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d c 8
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d XPATH_UNKNOWN_FUNC_ERROR...
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d c 9
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d XPATH_INVALID_OPERAND...
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d c 10
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d XPATH_INVALID_TYPE...
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d c 11
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d XPATH_INVALID_ARITY...
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d c 12
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d XPATH_INVALID_CTXT_SIZE...
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d c 13
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d XPATH_INVALID_CTXT_POSITION...
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d c 14
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d XPATH_MEMORY_ERROR...
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d c 15
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d XPTR_SYNTAX_ERROR...
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d c 16
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d XPTR_RESOURCE_ERROR...
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d c 17
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d XPTR_SUB_RESOURCE_ERROR...
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d c 18
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d XPATH_UNDEF_PREFIX_ERROR...
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d c 19
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d XPATH_ENCODING_ERROR...
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d c 20
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d XPATH_INVALID_CHAR_ERROR...
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d c 21
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d XPATH_INVALID_CTXT...
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d c 22
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d XPATH_STACK_ERROR...
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d c 23
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d XPATH_FORBID_VARIABLE_ERROR...
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d c 24
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* A node-set (an unordered collection of nodes without duplicates).
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d xmlNodeSetPtr s * based(######typedef######)
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d xmlNodeSet ds based(xmlNodeSetPtr)
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d align qualified
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d nodeNr like(xmlCint) Set node count
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d nodeMax like(xmlCint) Max # nodes in set
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d nodeTab * xmlNodePtr *
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* An expression is evaluated to yield an object, which
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* has one of the following four basic types:
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* - node-set
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* - boolean
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* - number
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* - string
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*
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* @@ XPointer will add more types !
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d xmlXPathObjectType...
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d s based(######typedef######)
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d like(xmlCenum)
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d XPATH_UNDEFINED...
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d c 0
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d XPATH_NODESET c 1
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d XPATH_BOOLEAN c 2
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d XPATH_NUMBER c 3
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d XPATH_STRING c 4
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d XPATH_POINT c 5
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d XPATH_RANGE c 6
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d XPATH_LOCATIONSET...
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d c 7
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d XPATH_USERS c 8
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d XPATH_XSLT_TREE... R/O XSLT value tree
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d c 9
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d xmlXPathObjectPtr...
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d s * based(######typedef######)
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d xmlXPathObject ds based(xmlXPathObjectPtr)
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d align qualified
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d type like(xmlXPathObjectType)
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d nodesetval like(xmlNodeSetPtr)
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d boolval like(xmlCint)
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d floatval like(xmlCdouble)
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d stringval * xmlChar *
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d user * void *
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d index like(xmlCint)
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d user2 * void *
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d index2 like(xmlCint)
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* xmlXPathConvertFunc:
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* @obj: an XPath object
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* @type: the number of the target type
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*
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* A conversion function is associated to a type and used to cast
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* the new type to primitive values.
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*
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* Returns -1 in case of error, 0 otherwise
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d xmlXPathConvertFunc...
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d s * based(######typedef######)
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d procptr
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* Extra type: a name and a conversion function.
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d xmlXPathTypePtr...
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d s * based(######typedef######)
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d xmlXPathType ds based(xmlXPathTypePtr)
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d align qualified
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d name * The type name
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d func like(xmlXPathConvertFunc) Conversion function
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* Extra variable: a name and a value.
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d xmlXPathVariablePtr...
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d s * based(######typedef######)
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d xmlXPathVariable...
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d ds based(xmlXPathVariablePtr)
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d align qualified
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d name * The variable name
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d value like(xmlXPathObjectPtr) The value
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* xmlXPathEvalFunc:
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* @ctxt: an XPath parser context
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* @nargs: the number of arguments passed to the function
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*
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* An XPath evaluation function, the parameters are on the XPath
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* context stack.
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d xmlXPathEvalFunc...
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d s * based(######typedef######)
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d procptr
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* Extra function: a name and an evaluation function.
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d xmlXPathFuncPtr...
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d s * based(######typedef######)
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d xmlXPathFunct ds based(xmlXPathFuncPtr)
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d align qualified
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d name * The function name
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d func like(xmlXPathEvalFunc) Evaluation function
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* xmlXPathAxisFunc:
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* @ctxt: the XPath interpreter context
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* @cur: the previous node being explored on that axis
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*
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* An axis traversal function. To traverse an axis, the engine calls
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* the first time with cur == NULL and repeat until the function returns
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* NULL indicating the end of the axis traversal.
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*
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* Returns the next node in that axis or NULL if at the end of the axis.
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d xmlXPathAxisFunc...
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d s * based(######typedef######)
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d procptr
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* Extra axis: a name and an axis function.
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d xmlXPathAxisPtr...
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d s * based(######typedef######)
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d xmlXPathAxis ds based(xmlXPathAxisPtr)
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d align qualified
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d name * The axis name
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d func like(xmlXPathAxisFunc) The search function
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* xmlXPathFunction:
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* @ctxt: the XPath interprestation context
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* @nargs: the number of arguments
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*
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* An XPath function.
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* The arguments (if any) are popped out from the context stack
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* and the result is pushed on the stack.
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d xmlXPathFunction...
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d s * based(######typedef######)
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d procptr
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* Function and Variable Lookup.
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* xmlXPathVariableLookupFunc:
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* @ctxt: an XPath context
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* @name: name of the variable
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* @ns_uri: the namespace name hosting this variable
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*
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* Prototype for callbacks used to plug variable lookup in the XPath
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* engine.
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*
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* Returns the XPath object value or NULL if not found.
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d xmlXPathVariableLookupFunc...
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d s * based(######typedef######)
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d procptr
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* xmlXPathFuncLookupFunc:
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* @ctxt: an XPath context
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* @name: name of the function
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* @ns_uri: the namespace name hosting this function
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*
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* Prototype for callbacks used to plug function lookup in the XPath
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* engine.
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*
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* Returns the XPath function or NULL if not found.
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d xmlXPathFuncLookupFunc...
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d s * based(######typedef######)
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d procptr
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* xmlXPathFlags:
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* Flags for XPath engine compilation and runtime
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* XML_XPATH_CHECKNS:
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*
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* check namespaces at compilation
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d XML_XPATH_CHECKNS...
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d c X'0001'
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* XML_XPATH_NOVAR:
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*
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* forbid variables in expression
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d XML_XPATH_NOVAR...
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d c X'0002'
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* xmlXPathContext:
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*
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* Expression evaluation occurs with respect to a context.
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* he context consists of:
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* - a node (the context node)
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* - a node list (the context node list)
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* - a set of variable bindings
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* - a function library
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* - the set of namespace declarations in scope for the expression
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* Following the switch to hash tables, this need to be trimmed up at
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* the next binary incompatible release.
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* The node may be modified when the context is passed to libxml2
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* for an XPath evaluation so you may need to initialize it again
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* before the next call.
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d xmlXPathContext...
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d ds based(xmlXPathContextPtr)
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d align qualified
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d doc like(xmlDocPtr) Current document
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d node like(xmlNodePtr) Current node
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*
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d nb_variables_unused... Unused (hash table)
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d like(xmlCint)
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d max_variables_unused... Unused (hash table)
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d like(xmlCint)
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d varHash like(xmlHashTablePtr) Defined variables
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*
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d nb_types like(xmlCint) # of defined types
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d max_types like(xmlCint) Max number of types
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d types like(xmlXPathTypePtr) Defined types array
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*
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d nb_funcs_unused... Unused (hash table)
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d like(xmlCint)
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d max_funcs_unused... Unused (hash table)
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d like(xmlCint)
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d funcHash like(xmlHashTablePtr) Defined functions
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*
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d nb_axis like(xmlCint) # of defined axis
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d max_axis like(xmlCint) Max number of axis
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d axis like(xmlXPathAxisPtr) Defined axis array
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*
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* the namespace nodes of the context node
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*
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d namespaces * xmlNsPtr *
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d nsNr like(xmlCint) # scope namespaces
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d user * procptr Function to free
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*
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* extra variables
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*
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d contextSize like(xmlCint) The context size
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d proximityPosition...
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d like(xmlCint)
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*
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* extra stuff for XPointer
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*
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d xptr like(xmlCint) XPointer context ?
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d here like(xmlNodePtr) For here()
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d origin like(xmlNodePtr) For origin()
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*
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* the set of namespace declarations in scope for the expression
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*
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d nsHash like(xmlHashTablePtr) Namespace hashtable
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d varLookupFunc like(xmlXPathVariableLookupFunc) Var lookup function
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d varLookupData * void *
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*
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* Possibility to link in an extra item
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*
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d extra * void *
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*
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* The function name and URI when calling a function
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*
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d function * const xmlChar *
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d functionURI * const xmlChar *
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*
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* function lookup function and data
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*
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d funcLookupFunc... Func lookup func
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d like(xmlXPathVariableLookupFunc)
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d funcLookupData... void *
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d *
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*
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* temporary namespace lists kept for walking the namespace axis
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*
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d tmpNsList * xmlNsPtr *
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d tmpNsNr like(xmlCint) # scope namespaces
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*
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* error reporting mechanism
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*
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d userData * void *
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d error like(xmlStructuredErrorFunc) Error callback
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d lastError likeds(xmlError) The last error
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d debugNode like(xmlNodePtr) XSLT source node
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*
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* dictionary
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*
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d dict like(xmlDictPtr) Dictionary if any
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*
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d flags like(xmlCint) Compilation control
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*
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* Cache for reusal of XPath objects
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*
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d cache * void *
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* The structure of a compiled expression form is not public.
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d xmlXPathCompExprPtr...
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d s * based(######typedef######)
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* xmlXPathParserContext:
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*
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* An XPath parser context. It contains pure parsing information,
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* an xmlXPathContext, and the stack of objects.
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d xmlXPathParserContext...
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d ds based(xmlXPathParserContextPtr)
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d align qualified
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d cur * const xmlChar *
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d base * const xmlChar *
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*
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d error like(xmlCint) Error code
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*
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d context like(xmlXPathContextPtr) Evaluation context
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d value like(xmlXPathObjectPtr) The current value
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d valueNr like(xmlCint) Value stack depth
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d valueMax like(xmlCint) Max stack depth
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d valueTab * xmlXPathObjectPtr *
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*
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d comp like(xmlXPathCompExprPtr) Precompiled expr.
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d xptr like(xmlCint) XPointer expression?
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d ancestor like(xmlNodePtr) To walk prec. axis
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*
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d valueFrame like(xmlCint) Limit stack pop
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**************************************************************************
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* *
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* Public API *
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* *
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**************************************************************************
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* Objects and Nodesets handling
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d xmlXPathNAN s import('xmlXPathNAN')
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d like(xmlCdouble)
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d xmlXPathPINF s import('xmlXPathPINF')
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d like(xmlCdouble)
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d xmlXPathNINF s import('xmlXPathNINF')
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d like(xmlCdouble)
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d xmlXPathFreeObject...
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d pr extproc('xmlXPathFreeObject')
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d obj value like(xmlXPathObjectPtr)
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d xmlXPathNodeSetCreate...
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d pr extproc('xmlXPathNodeSetCreate')
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d like(xmlNodeSetPtr)
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d val value like(xmlNodePtr)
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d xmlXPathFreeNodeSetList...
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d pr extproc('xmlXPathFreeNodeSetList')
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d obj value like(xmlXPathObjectPtr)
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d xmlXPathFreeNodeSet...
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d pr extproc('xmlXPathFreeNodeSet')
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d obj value like(xmlNodeSetPtr)
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d xmlXPathObjectCopy...
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d pr extproc('xmlXPathObjectCopy')
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d like(xmlXPathObjectPtr)
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d val value like(xmlXPathObjectPtr)
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d xmlXPathCmpNodes...
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d pr extproc('xmlXPathCmpNodes')
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d like(xmlCint)
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d node1 value like(xmlNodePtr)
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d node2 value like(xmlNodePtr)
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* Conversion functions to basic types.
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d xmlXPathCastNumberToBoolean...
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d pr extproc(
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d 'xmlXPathCastNumberToBoolean')
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d like(xmlCint)
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d val value like(xmlCdouble)
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d xmlXPathCastStringToBoolean...
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d pr extproc(
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d 'xmlXPathCastStringToBoolean')
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d like(xmlCint)
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d val * value options(*string) const xmlChar *
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d xmlXPathCastNodeSetToBoolean...
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d pr extproc(
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d 'xmlXPathCastNodeSetToBoolean')
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d like(xmlCint)
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d ns value like(xmlNodeSetPtr)
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d xmlXPathCastToBoolean...
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d pr extproc('xmlXPathCastToBoolean')
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d like(xmlCint)
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d val value like(xmlXPathObjectPtr)
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d xmlXPathCastBooleanToNumber...
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d pr extproc(
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d 'xmlXPathCastBooleanToNumber')
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d like(xmlCdouble)
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d val value like(xmlCint)
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d xmlXPathCastStringToNumber...
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d pr extproc('xmlXPathCastStringToNumber')
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d like(xmlCdouble)
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d val * value options(*string) const xmlChar *
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d xmlXPathCastNodeToNumber...
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d pr extproc('xmlXPathCastNodeToNumber')
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d like(xmlCdouble)
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d node value like(xmlNodePtr)
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d xmlXPathCastNodeSetToNumber...
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d pr extproc(
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d 'xmlXPathCastNodeSetToNumber')
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d like(xmlCdouble)
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d ns value like(xmlNodeSetPtr)
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d xmlXPathCastToNumber...
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d pr extproc('xmlXPathCastToNumber')
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d like(xmlCdouble)
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d val value like(xmlXPathObjectPtr)
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d xmlXPathCastBooleanToString...
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d pr * extproc( xmlChar *
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d 'xmlXPathCastBooleanToString')
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d val value like(xmlCint)
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d xmlXPathCastNumberToString...
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d pr * extproc('xmlXPathCastNumberToString')xmlChar *
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d val value like(xmlCdouble)
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d xmlXPathCastNodeToString...
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d pr * extproc('xmlXPathCastNodeToString') xmlChar *
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d node value like(xmlNodePtr)
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d xmlXPathCastNodeSetToString...
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d pr * extproc('xmlXPathCastNodeSetToString'xmlChar *
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d )
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d ns value like(xmlNodeSetPtr)
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d xmlXPathCastToString...
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d pr * extproc('xmlXPathCastToString') xmlChar *
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d val value like(xmlXPathObjectPtr)
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d xmlXPathConvertBoolean...
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d pr extproc('xmlXPathConvertBoolean')
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d like(xmlXPathObjectPtr)
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d val value like(xmlXPathObjectPtr)
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d xmlXPathConvertNumber...
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d pr extproc('xmlXPathConvertNumber')
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d like(xmlXPathObjectPtr)
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d val value like(xmlXPathObjectPtr)
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d xmlXPathConvertString...
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d pr extproc('xmlXPathConvertString')
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d like(xmlXPathObjectPtr)
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d val value like(xmlXPathObjectPtr)
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* Context handling.
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d xmlXPathNewContext...
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d pr extproc('xmlXPathNewContext')
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d like(xmlXPathContextPtr)
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d doc value like(xmlDocPtr)
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d xmlXPathFreeContext...
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d pr extproc('xmlXPathFreeContext')
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d ctxt value like(xmlXPathContextPtr)
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d xmlXPathContextSetCache...
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d pr extproc('xmlXPathContextSetCache')
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|
d like(xmlCint)
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d ctxt value like(xmlXPathContextPtr)
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d active value like(xmlCint)
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|
d value value like(xmlCint)
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|
d options value like(xmlCint)
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|
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|
* Evaluation functions.
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|
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d xmlXPathOrderDocElems...
|
|
d pr extproc('xmlXPathOrderDocElems')
|
|
d like(xmlClong)
|
|
d doc value like(xmlDocPtr)
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|
|
|
d xmlXPathSetContextNode...
|
|
d pr extproc('xmlXPathSetContextNode')
|
|
d like(xmlCint)
|
|
d node value like(xmlNodePtr)
|
|
d ctx value like(xmlXPathContextPtr)
|
|
|
|
d xmlXPathNodeEval...
|
|
d pr extproc('xmlXPathNodeEval')
|
|
d like(xmlXPathObjectPtr)
|
|
d node value like(xmlNodePtr)
|
|
d str * value options(*string) const xmlChar *
|
|
d ctx value like(xmlXPathContextPtr)
|
|
|
|
d xmlXPathEval pr extproc('xmlXPathEval')
|
|
d like(xmlXPathObjectPtr)
|
|
d str * value options(*string) const xmlChar *
|
|
d ctx value like(xmlXPathContextPtr)
|
|
|
|
d xmlXPathEvalExpression...
|
|
d pr extproc('xmlXPathEvalExpression')
|
|
d like(xmlXPathObjectPtr)
|
|
d str * value options(*string) const xmlChar *
|
|
d ctxt value like(xmlXPathContextPtr)
|
|
|
|
d xmlXPathEvalPredicate...
|
|
d pr extproc('xmlXPathEvalPredicate')
|
|
d like(xmlCint)
|
|
d ctxt value like(xmlXPathContextPtr)
|
|
d res value like(xmlXPathObjectPtr)
|
|
|
|
* Separate compilation/evaluation entry points.
|
|
|
|
d xmlXPathCompile...
|
|
d pr extproc('xmlXPathCompile')
|
|
d like(xmlXPathCompExprPtr)
|
|
d str * value options(*string) const xmlChar *
|
|
|
|
d xmlXPathCtxtCompile...
|
|
d pr extproc('xmlXPathCtxtCompile')
|
|
d like(xmlXPathCompExprPtr)
|
|
d ctxt value like(xmlXPathContextPtr)
|
|
d str * value options(*string) const xmlChar *
|
|
|
|
d xmlXPathCompiledEval...
|
|
d pr extproc('xmlXPathCompiledEval')
|
|
d like(xmlXPathObjectPtr)
|
|
d comp value like(xmlXPathCompExprPtr)
|
|
d ctx value like(xmlXPathContextPtr)
|
|
|
|
d xmlXPathCompiledEvalToBoolean...
|
|
d pr extproc(
|
|
d 'xmlXPathCompiledEvalToBoolean')
|
|
d like(xmlCint)
|
|
d comp value like(xmlXPathCompExprPtr)
|
|
d ctxt value like(xmlXPathContextPtr)
|
|
|
|
d xmlXPathFreeCompExpr...
|
|
d pr extproc('xmlXPathFreeCompExpr')
|
|
d comp value like(xmlXPathCompExprPtr)
|
|
/endif LIBXML_XPATH_ENABLED
|
|
|
|
/undefine XML_TESTVAL
|
|
/if defined(LIBXML_XPATH_ENABLED)
|
|
/define XML_TESTVAL
|
|
/elseif defined(LIBXML_SCHEMAS_ENABLED)
|
|
/define XML_TESTVAL
|
|
/endif
|
|
/if defined(XML_TESTVAL)
|
|
d xmlXPathInit pr extproc('xmlXPathInit')
|
|
|
|
d xmlXPathIsNaN pr extproc('xmlXPathIsNaN')
|
|
d like(xmlCint)
|
|
d val value like(xmlCdouble)
|
|
|
|
d xmlXPathIsInf pr extproc('xmlXPathIsInf')
|
|
d like(xmlCint)
|
|
d val value like(xmlCdouble)
|
|
|
|
/undefine XML_TESTVAL
|
|
/endif
|
|
|
|
* C macros implemented as procedures for ILE/RPG support.
|
|
|
|
/if defined(LIBXML_XPATH_ENABLED)
|
|
d xmlXPathNodeSetGetLength...
|
|
d pr extproc('__xmlXPathNodeSetGetLength')
|
|
d like(xmlCint)
|
|
d ns value like(xmlNodeSetPtr)
|
|
|
|
d xmlXPathNodeSetItem...
|
|
d pr extproc('__xmlXPathNodeSetItem')
|
|
d like(xmlNodePtr)
|
|
d ns value like(xmlNodeSetPtr)
|
|
d index value like(xmlCint)
|
|
|
|
d xmlXPathNodeSetIsEmpty...
|
|
d pr extproc('__xmlXPathNodeSetIsEmpty')
|
|
d like(xmlCint)
|
|
d ns value like(xmlNodeSetPtr)
|
|
/endif LIBXML_XPATH_ENABLED
|
|
/endif XML_XPATH_H__
|