/*
 * xsltInternals.h: internal data structures, constants and functions used
 *                  by the XSLT engine.
 *                  They are not part of the API or ABI, i.e. they can change
 *                  without prior notice, use carefully.
 *
 * See Copyright for the status of this software.
 *
 * daniel@veillard.com
 */

#ifndef __XML_XSLT_INTERNALS_H__
#define __XML_XSLT_INTERNALS_H__

#include <libxml/tree.h>
#include <libxml/hash.h>
#include <libxml/xpath.h>
#include <libxml/xmlerror.h>
#include <libxslt/xslt.h>
#include "numbersInternals.h"

#ifdef __cplusplus
extern "C" {
#endif

/**
 * XSLT_MAX_SORT:
 *
 * Max number of specified xsl:sort on an element.
 */
#define XSLT_MAX_SORT 5

/**
 * XSLT_PAT_NO_PRIORITY:
 *
 * Specific value for pattern without priority expressed.
 */
#define XSLT_PAT_NO_PRIORITY -12345789

/**
 * xsltRuntimeExtra:
 *
 * Extra information added to the transformation context.
 */
typedef struct _xsltRuntimeExtra xsltRuntimeExtra;
typedef xsltRuntimeExtra *xsltRuntimeExtraPtr;
struct _xsltRuntimeExtra {
    void       *info;		/* pointer to the extra data */
    xmlFreeFunc deallocate;	/* pointer to the deallocation routine */
    void       *val;		/* data not needing deallocation */
};

#define XSLT_RUNTIME_EXTRA_LST(ctxt, nr) (ctxt)->extras[(nr)].info
#define XSLT_RUNTIME_EXTRA_FREE(ctxt, nr) (ctxt)->extras[(nr)].deallocate
#define	XSLT_RUNTIME_EXTRA(ctxt, nr) (ctxt)->extras[(nr)].val

/**
 * xsltTemplate:
 *
 * The in-memory structure corresponding to an XSLT Template.
 */
typedef struct _xsltTemplate xsltTemplate;
typedef xsltTemplate *xsltTemplatePtr;
struct _xsltTemplate {
    struct _xsltTemplate *next;/* chained list sorted by priority */
    struct _xsltStylesheet *style;/* the containing stylesheet */
    xmlChar *match;	/* the matching string */
    float priority;	/* as given from the stylesheet, not computed */
    xmlChar *name;	/* the local part of the name QName */
    xmlChar *nameURI;	/* the URI part of the name QName */
    xmlChar *mode;	/* the local part of the mode QName */
    xmlChar *modeURI;	/* the URI part of the mode QName */
    xmlNodePtr content;	/* the template replacement value */
    xmlNodePtr elem;	/* the source element */

    int inheritedNsNr;  /* number of inherited namespaces */
    xmlNsPtr *inheritedNs;/* inherited non-excluded namespaces */

    /* Profiling informations */
    int nbCalls;        /* the number of time the template was called */
    unsigned long time; /* the time spent in this template */
};

/**
 * xsltDecimalFormat:
 *
 * Data structure of decimal-format.
 */
typedef struct _xsltDecimalFormat xsltDecimalFormat;
typedef xsltDecimalFormat *xsltDecimalFormatPtr;
struct _xsltDecimalFormat {
    struct _xsltDecimalFormat *next; /* chained list */
    xmlChar *name;
    /* Used for interpretation of pattern */
    xmlChar *digit;
    xmlChar *patternSeparator;
    /* May appear in result */
    xmlChar *minusSign;
    xmlChar *infinity;
    xmlChar *noNumber; /* Not-a-number */
    /* Used for interpretation of pattern and may appear in result */
    xmlChar *decimalPoint;
    xmlChar *grouping;
    xmlChar *percent;
    xmlChar *permille;
    xmlChar *zeroDigit;
};

/**
 * xsltDocument:
 *
 * Data structure associated to a parsed document.
 */

typedef struct _xsltDocument xsltDocument;
typedef xsltDocument *xsltDocumentPtr;
struct _xsltDocument {
    struct _xsltDocument *next;	/* documents are kept in a chained list */
    int main;			/* is this the main document */
    xmlDocPtr doc;		/* the parsed document */
    void *keys;			/* key tables storage */
};

typedef struct _xsltTransformContext xsltTransformContext;
typedef xsltTransformContext *xsltTransformContextPtr;

/**
 * xsltElemPreComp:
 *
 * The in-memory structure corresponding to element precomputed data,
 * designed to be extended by extension implementors.
 */
typedef struct _xsltElemPreComp xsltElemPreComp;
typedef xsltElemPreComp *xsltElemPreCompPtr;

/**
 * xsltTransformFunction:
 * @ctxt: the XSLT transformation context
 * @node: the input node
 * @inst: the stylesheet node
 * @comp: the compiled information from the stylesheet
 *
 * Signature of the function associated to elements part of the
 * stylesheet language like xsl:if or xsl:apply-templates.
 */
typedef void (*xsltTransformFunction) (xsltTransformContextPtr ctxt,
	                               xmlNodePtr node,
				       xmlNodePtr inst,
			               xsltElemPreCompPtr comp);

/**
 * xsltSortFunc:
 * @ctxt:    a transformation context
 * @sorts:   the node-set to sort
 * @nbsorts: the number of sorts
 *
 * Signature of the function to use during sorting
 */
typedef void (*xsltSortFunc) (xsltTransformContextPtr ctxt, xmlNodePtr *sorts,
			      int nbsorts);

typedef enum {
    XSLT_FUNC_COPY=1,
    XSLT_FUNC_SORT,
    XSLT_FUNC_TEXT,
    XSLT_FUNC_ELEMENT,
    XSLT_FUNC_ATTRIBUTE,
    XSLT_FUNC_COMMENT,
    XSLT_FUNC_PI,
    XSLT_FUNC_COPYOF,
    XSLT_FUNC_VALUEOF,
    XSLT_FUNC_NUMBER,
    XSLT_FUNC_APPLYIMPORTS,
    XSLT_FUNC_CALLTEMPLATE,
    XSLT_FUNC_APPLYTEMPLATES,
    XSLT_FUNC_CHOOSE,
    XSLT_FUNC_IF,
    XSLT_FUNC_FOREACH,
    XSLT_FUNC_DOCUMENT,
    XSLT_FUNC_WITHPARAM,
    XSLT_FUNC_PARAM,
    XSLT_FUNC_VARIABLE,
    XSLT_FUNC_WHEN,
    XSLT_FUNC_EXTENSION
} xsltStyleType;

/**
 * xsltElemPreCompDeallocator:
 * @comp:  the #xsltElemPreComp to free up
 *
 * Deallocates an #xsltElemPreComp structure.
 */
typedef void (*xsltElemPreCompDeallocator) (xsltElemPreCompPtr comp);

/**
 * xsltElemPreComp:
 *
 * The in-memory structure corresponding to element precomputed data,
 * designed to be extended by extension implementors.
 */
struct _xsltElemPreComp {
    xsltElemPreCompPtr next;		/* chained list */
    xsltStyleType type;			/* type of the element */
    xsltTransformFunction func; 	/* handling function */
    xmlNodePtr inst;			/* the instruction */

    /* end of common part */
    xsltElemPreCompDeallocator free;	/* the deallocator */
};

/**
 * xsltStylePreComp:
 *
 * The in-memory structure corresponding to XSLT stylesheet constructs
 * precomputed data.
 */
typedef struct _xsltStylePreComp xsltStylePreComp;

typedef xsltStylePreComp *xsltStylePreCompPtr;

struct _xsltStylePreComp {
    xsltElemPreCompPtr next;	/* chained list */
    xsltStyleType type;		/* type of the element */
    xsltTransformFunction func; /* handling function */
    xmlNodePtr inst;		/* the instruction */

    /*
     * Pre computed values.
     */

    xmlChar *stype;             /* sort */
    int      has_stype;		/* sort */
    int      number;		/* sort */
    xmlChar *order;             /* sort */
    int      has_order;		/* sort */
    int      descending;	/* sort */
    xmlChar *lang;		/* sort */
    int      has_lang;		/* sort */
    xmlChar *case_order;	/* sort */
    int      lower_first;	/* sort */

    xmlChar *use;		/* copy, element */
    int      has_use;		/* copy, element */

    int      noescape;		/* text */

    xmlChar *name;		/* element, attribute, pi */
    int      has_name;		/* element, attribute, pi */
    xmlChar *ns;		/* element */
    int      has_ns;		/* element */

    xmlChar *mode;		/* apply-templates */
    xmlChar *modeURI;		/* apply-templates */

    xmlChar *test;		/* if */

    xsltTemplatePtr templ;	/* call-template */

    xmlChar *select;		/* sort, copy-of, value-of, apply-templates */

    int      ver11;		/* document */
    xmlChar *filename;		/* document URL */
    int      has_filename;	/* document */

    xsltNumberData numdata;	/* number */

    xmlXPathCompExprPtr comp;	/* a precompiled XPath expression */
    xmlNsPtr *nsList;		/* the namespaces in scope */
    int nsNr;			/* the number of namespaces in scope */
};

/*
 * The in-memory structure corresponding to an XSLT Variable
 * or Param.
 */

typedef struct _xsltStackElem xsltStackElem;
typedef xsltStackElem *xsltStackElemPtr;
struct _xsltStackElem {
    struct _xsltStackElem *next;/* chained list */
    xsltStylePreCompPtr comp;   /* the compiled form */
    int computed;	/* was the evaluation done */
    xmlChar *name;	/* the local part of the name QName */
    xmlChar *nameURI;	/* the URI part of the name QName */
    xmlChar *select;	/* the eval string */
    xmlNodePtr tree;	/* the tree if no eval string or the location */
    xmlXPathObjectPtr value; /* The value if computed */
};

/*
 * The in-memory structure corresponding to an XSLT Stylesheet.
 * NOTE: most of the content is simply linked from the doc tree
 *       structure, no specific allocation is made.
 */
typedef struct _xsltStylesheet xsltStylesheet;
typedef xsltStylesheet *xsltStylesheetPtr;
struct _xsltStylesheet {
    /*
     * The stylesheet import relation is kept as a tree.
     */
    struct _xsltStylesheet *parent;
    struct _xsltStylesheet *next;
    struct _xsltStylesheet *imports;

    xsltDocumentPtr docList;		/* the include document list */

    /*
     * General data on the style sheet document.
     */
    xmlDocPtr doc;		/* the parsed XML stylesheet */
    xmlHashTablePtr stripSpaces;/* the hash table of the strip-space and
				   preserve space elements */
    int             stripAll;	/* strip-space * (1) preserve-space * (-1) */
    xmlHashTablePtr cdataSection;/* the hash table of the cdata-section */

    /*
     * Global variable or parameters.
     */
    xsltStackElemPtr variables; /* linked list of param and variables */

    /*
     * Template descriptions.
     */
    xsltTemplatePtr templates;	/* the ordered list of templates */
    void *templatesHash;	/* hash table or wherever compiled templates
				   informations are stored */
    void *rootMatch;		/* template based on / */
    void *keyMatch;		/* template based on key() */
    void *elemMatch;		/* template based on * */
    void *attrMatch;		/* template based on @* */
    void *parentMatch;		/* template based on .. */
    void *textMatch;		/* template based on text() */
    void *piMatch;		/* template based on processing-instruction() */
    void *commentMatch;		/* template based on comment() */
    
    /*
     * Namespace aliases.
     */
    xmlHashTablePtr nsAliases;	/* the namespace alias hash tables */

    /*
     * Attribute sets.
     */
    xmlHashTablePtr attributeSets;/* the attribute sets hash tables */

    /*
     * Namespaces.
     */
    xmlHashTablePtr nsHash;     /* the set of namespaces in use */
    void           *nsDefs;     /* the namespaces defined */

    /*
     * Key definitions.
     */
    void *keys;				/* key definitions */

    /*
     * Output related stuff.
     */
    xmlChar *method;		/* the output method */
    xmlChar *methodURI;		/* associated namespace if any */
    xmlChar *version;		/* version string */
    xmlChar *encoding;		/* encoding string */
    int omitXmlDeclaration;     /* omit-xml-declaration = "yes" | "no" */

    /* 
     * Number formatting.
     */
    xsltDecimalFormatPtr decimalFormat;
    int standalone;             /* standalone = "yes" | "no" */
    xmlChar *doctypePublic;     /* doctype-public string */
    xmlChar *doctypeSystem;     /* doctype-system string */
    int indent;			/* should output being indented */
    xmlChar *mediaType;		/* media-type string */

    /*
     * Precomputed blocks.
     */
    xsltElemPreCompPtr preComps;/* list of precomputed blocks */
    int warnings;		/* number of warnings found at compilation */
    int errors;			/* number of errors found at compilation */

    xmlChar  *exclPrefix;	/* last excluded prefixes */
    xmlChar **exclPrefixTab;	/* array of excluded prefixes */
    int       exclPrefixNr;	/* number of excluded prefixes in scope */
    int       exclPrefixMax;	/* size of the array */

    void     *_private;		/* user defined data */

    /*
     * Extensions.
     */
    xmlHashTablePtr extInfos;	/* the extension data */
    int		    extrasNr;	/* the number of extras required */
};

/*
 * The in-memory structure corresponding to an XSLT Transformation.
 */
typedef enum {
    XSLT_OUTPUT_XML = 0,
    XSLT_OUTPUT_HTML,
    XSLT_OUTPUT_TEXT
} xsltOutputType;

typedef enum {
    XSLT_STATE_OK = 0,
    XSLT_STATE_ERROR,
    XSLT_STATE_STOPPED
} xsltTransformState;

struct _xsltTransformContext {
    xsltStylesheetPtr style;		/* the stylesheet used */
    xsltOutputType type;		/* the type of output */

    xsltTemplatePtr  templ;		/* the current template */
    int              templNr;		/* Nb of templates in the stack */
    int              templMax;		/* Size of the templtes stack */
    xsltTemplatePtr *templTab;		/* the template stack */

    xsltStackElemPtr  vars;		/* the current variable list */
    int               varsNr;		/* Nb of variable list in the stack */
    int               varsMax;		/* Size of the variable list stack */
    xsltStackElemPtr *varsTab;		/* the variable list stack */
    int               varsBase;		/* the var base for current templ */

    /*
     * Extensions
     */
    xmlHashTablePtr   extFunctions;	/* the extension functions */
    xmlHashTablePtr   extElements;	/* the extension elements */
    xmlHashTablePtr   extInfos;		/* the extension data */

    const xmlChar *mode;		/* the current mode */
    const xmlChar *modeURI;		/* the current mode URI */

    xsltDocumentPtr docList;		/* the document list */

    xsltDocumentPtr document;		/* the current document */
    xmlNodePtr node;			/* the current node being processed */
    xmlNodeSetPtr nodeList;		/* the current node list */
    /* xmlNodePtr current;			the node */

    xmlDocPtr output;			/* the resulting document */
    xmlNodePtr insert;			/* the insertion node */

    xmlXPathContextPtr xpathCtxt;	/* the XPath context */
    xsltTransformState state;		/* the current state */

    /*
     * Global variables
     */
    xmlHashTablePtr   globalVars;	/* the global variables and params */

    xmlNodePtr inst;			/* the instruction in the stylesheet */

    int xinclude;			/* should XInclude be processed */

    const char *      outputFile;	/* the output URI if known */

    int profile;                        /* is this run profiled */
    long             prof;		/* the current profiled value */
    int              profNr;		/* Nb of templates in the stack */
    int              profMax;		/* Size of the templtaes stack */
    long            *profTab;		/* the profile template stack */

    void            *_private;		/* user defined data */

    int              extrasNr;		/* the number of extras used */
    int              extrasMax;		/* the number of extras allocated */
    xsltRuntimeExtraPtr extras;		/* extra per runtime informations */

    xsltDocumentPtr  styleList;		/* the stylesheet docs list */
    void                 * sec;		/* the security preferences if any */

    xmlGenericErrorFunc  error;		/* a specific error handler */
    void              * errctx;		/* context for the error handler */

    xsltSortFunc      sortfunc;		/* a ctxt specific sort routine */
};

/**
 * CHECK_STOPPED:
 *
 * Macro to check if the XSLT processing should be stopped.
 * Will return from the function.
 */
#define CHECK_STOPPED if (ctxt->state == XSLT_STATE_STOPPED) return;

/**
 * CHECK_STOPPEDE:
 *
 * Macro to check if the XSLT processing should be stopped.
 * Will goto the error: label.
 */
#define CHECK_STOPPEDE if (ctxt->state == XSLT_STATE_STOPPED) goto error;

/**
 * CHECK_STOPPED0:
 *
 * Macro to check if the XSLT processing should be stopped.
 * Will return from the function with a 0 value.
 */
#define CHECK_STOPPED0 if (ctxt->state == XSLT_STATE_STOPPED) return(0);

/*
 * Functions associated to the internal types
xsltDecimalFormatPtr	xsltDecimalFormatGetByName(xsltStylesheetPtr sheet,
						   xmlChar *name);
 */
xsltStylesheetPtr	xsltNewStylesheet	(void);
xsltStylesheetPtr	xsltParseStylesheetFile	(const xmlChar* filename);
void			xsltFreeStylesheet	(xsltStylesheetPtr sheet);
int			xsltIsBlank		(xmlChar *str);
void			xsltFreeStackElemList	(xsltStackElemPtr elem);
xsltDecimalFormatPtr	xsltDecimalFormatGetByName(xsltStylesheetPtr sheet,
						   xmlChar *name);

xsltStylesheetPtr	xsltParseStylesheetProcess(xsltStylesheetPtr ret,
	                                         xmlDocPtr doc);
void			xsltParseStylesheetOutput(xsltStylesheetPtr style,
						  xmlNodePtr cur);
xsltStylesheetPtr	xsltParseStylesheetDoc	(xmlDocPtr doc);
xsltStylesheetPtr	xsltLoadStylesheetPI	(xmlDocPtr doc);
void 			xsltNumberFormat	(xsltTransformContextPtr ctxt,
						 xsltNumberDataPtr data,
						 xmlNodePtr node);
xmlXPathError		 xsltFormatNumberConversion(xsltDecimalFormatPtr self,
						 xmlChar *format,
						 double number,
						 xmlChar **result);

void			xsltParseTemplateContent(xsltStylesheetPtr style,
						 xmlNodePtr templ);
int			xsltAllocateExtra	(xsltStylesheetPtr style);
int			xsltAllocateExtraCtxt	(xsltTransformContextPtr ctxt);
#ifdef __cplusplus
}
#endif

#endif /* __XML_XSLT_H__ */

