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/*
* Summary: regular expressions handling
* Description: basic API for libxml regular expressions handling used
* for XML Schemas and validation.
*
* Copy: See Copyright for the status of this software.
*
* Author: Daniel Veillard
*/
#ifndef __XML_REGEXP_H__
#define __XML_REGEXP_H__
#include <stdio.h>
#include <libxml/xmlversion.h>
#include <libxml/xmlstring.h>
#ifdef LIBXML_REGEXP_ENABLED
#ifdef __cplusplus
extern "C" {
#endif
/**
* xmlRegexpPtr:
*
* A libxml regular expression, they can actually be far more complex
* thank the POSIX regex expressions.
*/
typedef struct _xmlRegexp xmlRegexp;
typedef xmlRegexp *xmlRegexpPtr;
/**
* xmlRegExecCtxtPtr:
*
* A libxml progressive regular expression evaluation context
*/
typedef struct _xmlRegExecCtxt xmlRegExecCtxt;
typedef xmlRegExecCtxt *xmlRegExecCtxtPtr;
/*
* The POSIX like API
*/
XMLPUBFUN xmlRegexpPtr
xmlRegexpCompile (const xmlChar *regexp);
XMLPUBFUN void xmlRegFreeRegexp(xmlRegexpPtr regexp);
XMLPUBFUN int
xmlRegexpExec (xmlRegexpPtr comp,
const xmlChar *value);
XMLPUBFUN void
xmlRegexpPrint (FILE *output,
xmlRegexpPtr regexp);
XMLPUBFUN int
xmlRegexpIsDeterminist(xmlRegexpPtr comp);
/**
* xmlRegExecCallbacks:
* @exec: the regular expression context
* @token: the current token string
* @transdata: transition data
* @inputdata: input data
*
* Callback function when doing a transition in the automata
*/
typedef void (*xmlRegExecCallbacks) (xmlRegExecCtxtPtr exec,
const xmlChar *token,
void *transdata,
void *inputdata);
/*
* The progressive API
*/
XMLPUBFUN xmlRegExecCtxtPtr
xmlRegNewExecCtxt (xmlRegexpPtr comp,
xmlRegExecCallbacks callback,
void *data);
XMLPUBFUN void
xmlRegFreeExecCtxt (xmlRegExecCtxtPtr exec);
XMLPUBFUN int
xmlRegExecPushString(xmlRegExecCtxtPtr exec,
const xmlChar *value,
void *data);
XMLPUBFUN int
xmlRegExecPushString2(xmlRegExecCtxtPtr exec,
const xmlChar *value,
const xmlChar *value2,
void *data);
XMLPUBFUN int
xmlRegExecNextValues(xmlRegExecCtxtPtr exec,
int *nbval,
int *nbneg,
xmlChar **values,
int *terminal);
XMLPUBFUN int
xmlRegExecErrInfo (xmlRegExecCtxtPtr exec,
const xmlChar **string,
int *nbval,
int *nbneg,
xmlChar **values,
int *terminal);
#ifdef LIBXML_EXPR_ENABLED
/*
* Formal regular expression handling
* Its goal is to do some formal work on content models
*/
/* expressions are used within a context */
typedef struct _xmlExpCtxt xmlExpCtxt;
typedef xmlExpCtxt *xmlExpCtxtPtr;
XMLPUBFUN void
xmlExpFreeCtxt (xmlExpCtxtPtr ctxt);
XMLPUBFUN xmlExpCtxtPtr
xmlExpNewCtxt (int maxNodes,
xmlDictPtr dict);
XMLPUBFUN int
xmlExpCtxtNbNodes(xmlExpCtxtPtr ctxt);
XMLPUBFUN int
xmlExpCtxtNbCons(xmlExpCtxtPtr ctxt);
/* Expressions are trees but the tree is opaque */
typedef struct _xmlExpNode xmlExpNode;
typedef xmlExpNode *xmlExpNodePtr;
typedef enum {
XML_EXP_EMPTY = 0,
XML_EXP_FORBID = 1,
XML_EXP_ATOM = 2,
XML_EXP_SEQ = 3,
XML_EXP_OR = 4,
XML_EXP_COUNT = 5
} xmlExpNodeType;
/*
* 2 core expressions shared by all for the empty language set
* and for the set with just the empty token
*/
XMLPUBVAR xmlExpNodePtr forbiddenExp;
XMLPUBVAR xmlExpNodePtr emptyExp;
/*
* Expressions are reference counted internally
*/
XMLPUBFUN void
xmlExpFree (xmlExpCtxtPtr ctxt,
xmlExpNodePtr expr);
XMLPUBFUN void
xmlExpRef (xmlExpNodePtr expr);
/*
* constructors can be either manual or from a string
*/
XMLPUBFUN xmlExpNodePtr
xmlExpParse (xmlExpCtxtPtr ctxt,
const char *expr);
XMLPUBFUN xmlExpNodePtr
xmlExpNewAtom (xmlExpCtxtPtr ctxt,
const xmlChar *name,
int len);
XMLPUBFUN xmlExpNodePtr
xmlExpNewOr (xmlExpCtxtPtr ctxt,
xmlExpNodePtr left,
xmlExpNodePtr right);
XMLPUBFUN xmlExpNodePtr
xmlExpNewSeq (xmlExpCtxtPtr ctxt,
xmlExpNodePtr left,
xmlExpNodePtr right);
XMLPUBFUN xmlExpNodePtr
xmlExpNewRange (xmlExpCtxtPtr ctxt,
xmlExpNodePtr subset,
int min,
int max);
/*
* The really interesting APIs
*/
XMLPUBFUN int
xmlExpIsNillable(xmlExpNodePtr expr);
XMLPUBFUN int
xmlExpMaxToken (xmlExpNodePtr expr);
XMLPUBFUN int
xmlExpGetLanguage(xmlExpCtxtPtr ctxt,
xmlExpNodePtr expr,
const xmlChar**langList,
int len);
XMLPUBFUN int
xmlExpGetStart (xmlExpCtxtPtr ctxt,
xmlExpNodePtr expr,
const xmlChar**tokList,
int len);
XMLPUBFUN xmlExpNodePtr
xmlExpStringDerive(xmlExpCtxtPtr ctxt,
xmlExpNodePtr expr,
const xmlChar *str,
int len);
XMLPUBFUN xmlExpNodePtr
xmlExpExpDerive (xmlExpCtxtPtr ctxt,
xmlExpNodePtr expr,
xmlExpNodePtr sub);
XMLPUBFUN int
xmlExpSubsume (xmlExpCtxtPtr ctxt,
xmlExpNodePtr expr,
xmlExpNodePtr sub);
XMLPUBFUN void
xmlExpDump (xmlBufferPtr buf,
xmlExpNodePtr expr);
#endif /* LIBXML_EXPR_ENABLED */
#ifdef __cplusplus
}
#endif
#endif /* LIBXML_REGEXP_ENABLED */
#endif /*__XML_REGEXP_H__ */
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