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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__ */