xref: /external/libxml2/relaxng.c

/*
 * relaxng.c : implementation of the Relax-NG handling and validity checking
 *
 * See Copyright for the status of this software.
 *
 * Daniel Veillard <veillard (at) redhat.com>
 */

/**
 * TODO:
 * - add support for DTD compatibility spec
 *   http://www.oasis-open.org/committees/relax-ng/compatibility-20011203.html
 * - report better mem allocations pbms at runtime and abort immediately.
 */

#define IN_LIBXML
#include "libxml.h"

#ifdef LIBXML_SCHEMAS_ENABLED

#include <string.h>
#include <stdio.h>
#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include <libxml/hash.h>
#include <libxml/uri.h>

#include <libxml/relaxng.h>

#include <libxml/xmlschemastypes.h>
#include <libxml/xmlautomata.h>
#include <libxml/xmlregexp.h>
#include <libxml/xmlschemastypes.h>

/*
 * The Relax-NG namespace
 */
static const xmlChar *xmlRelaxNGNs = (const xmlChar *)
    "http://relaxng.org/ns/structure/1.0";

#define IS_RELAXNG(node, type)						\
   ((node != NULL) && (node->ns != NULL) &&				\
    (xmlStrEqual(node->name, (const xmlChar *) type)) &&		\
    (xmlStrEqual(node->ns->href, xmlRelaxNGNs)))


#if 0
#define DEBUG 1

#define DEBUG_GRAMMAR 1

#define DEBUG_CONTENT 1

#define DEBUG_TYPE 1

#define DEBUG_VALID 1

#define DEBUG_INTERLEAVE 1

#define DEBUG_LIST 1

#define DEBUG_INCLUDE 1

#define DEBUG_ERROR 1

#define DEBUG_COMPILE 1

#define DEBUG_PROGRESSIVE 1
#endif

#define MAX_ERROR 5

#define TODO 								\
    xmlGenericError(xmlGenericErrorContext,				\
	    "Unimplemented block at %s:%d\n",				\
            __FILE__, __LINE__);

typedef struct _xmlRelaxNGSchema xmlRelaxNGSchema;
typedef xmlRelaxNGSchema *xmlRelaxNGSchemaPtr;

typedef struct _xmlRelaxNGDefine xmlRelaxNGDefine;
typedef xmlRelaxNGDefine *xmlRelaxNGDefinePtr;

typedef struct _xmlRelaxNGDocument xmlRelaxNGDocument;
typedef xmlRelaxNGDocument *xmlRelaxNGDocumentPtr;

typedef struct _xmlRelaxNGInclude xmlRelaxNGInclude;
typedef xmlRelaxNGInclude *xmlRelaxNGIncludePtr;

typedef enum {
    XML_RELAXNG_COMBINE_UNDEFINED = 0,  /* undefined */
    XML_RELAXNG_COMBINE_CHOICE, /* choice */
    XML_RELAXNG_COMBINE_INTERLEAVE      /* interleave */
} xmlRelaxNGCombine;

typedef enum {
    XML_RELAXNG_CONTENT_ERROR = -1,
    XML_RELAXNG_CONTENT_EMPTY = 0,
    XML_RELAXNG_CONTENT_SIMPLE,
    XML_RELAXNG_CONTENT_COMPLEX
} xmlRelaxNGContentType;

typedef struct _xmlRelaxNGGrammar xmlRelaxNGGrammar;
typedef xmlRelaxNGGrammar *xmlRelaxNGGrammarPtr;

struct _xmlRelaxNGGrammar {
    xmlRelaxNGGrammarPtr parent;        /* the parent grammar if any */
    xmlRelaxNGGrammarPtr children;      /* the children grammar if any */
    xmlRelaxNGGrammarPtr next;  /* the next grammar if any */
    xmlRelaxNGDefinePtr start;  /* <start> content */
    xmlRelaxNGCombine combine;  /* the default combine value */
    xmlRelaxNGDefinePtr startList;      /* list of <start> definitions */
    xmlHashTablePtr defs;       /* define* */
    xmlHashTablePtr refs;       /* references */
};


typedef enum {
    XML_RELAXNG_NOOP = -1,      /* a no operation from simplification  */
    XML_RELAXNG_EMPTY = 0,      /* an empty pattern */
    XML_RELAXNG_NOT_ALLOWED,    /* not allowed top */
    XML_RELAXNG_EXCEPT,         /* except present in nameclass defs */
    XML_RELAXNG_TEXT,           /* textual content */
    XML_RELAXNG_ELEMENT,        /* an element */
    XML_RELAXNG_DATATYPE,       /* extenal data type definition */
    XML_RELAXNG_PARAM,          /* extenal data type parameter */
    XML_RELAXNG_VALUE,          /* value from an extenal data type definition */
    XML_RELAXNG_LIST,           /* a list of patterns */
    XML_RELAXNG_ATTRIBUTE,      /* an attrbute following a pattern */
    XML_RELAXNG_DEF,            /* a definition */
    XML_RELAXNG_REF,            /* reference to a definition */
    XML_RELAXNG_EXTERNALREF,    /* reference to an external def */
    XML_RELAXNG_PARENTREF,      /* reference to a def in the parent grammar */
    XML_RELAXNG_OPTIONAL,       /* optional patterns */
    XML_RELAXNG_ZEROORMORE,     /* zero or more non empty patterns */
    XML_RELAXNG_ONEORMORE,      /* one or more non empty patterns */
    XML_RELAXNG_CHOICE,         /* a choice between non empty patterns */
    XML_RELAXNG_GROUP,          /* a pair/group of non empty patterns */
    XML_RELAXNG_INTERLEAVE,     /* interleaving choice of non-empty patterns */
    XML_RELAXNG_START           /* Used to keep track of starts on grammars */
} xmlRelaxNGType;

#define IS_NULLABLE		(1 << 0)
#define IS_NOT_NULLABLE		(1 << 1)
#define IS_INDETERMINIST	(1 << 2)
#define IS_MIXED		(1 << 3)
#define IS_TRIABLE		(1 << 4)
#define IS_PROCESSED		(1 << 5)
#define IS_COMPILABLE		(1 << 6)
#define IS_NOT_COMPILABLE	(1 << 7)

struct _xmlRelaxNGDefine {
    xmlRelaxNGType type;        /* the type of definition */
    xmlNodePtr node;            /* the node in the source */
    xmlChar *name;              /* the element local name if present */
    xmlChar *ns;                /* the namespace local name if present */
    xmlChar *value;             /* value when available */
    void *data;                 /* data lib or specific pointer */
    xmlRelaxNGDefinePtr content;        /* the expected content */
    xmlRelaxNGDefinePtr parent; /* the parent definition, if any */
    xmlRelaxNGDefinePtr next;   /* list within grouping sequences */
    xmlRelaxNGDefinePtr attrs;  /* list of attributes for elements */
    xmlRelaxNGDefinePtr nameClass;      /* the nameClass definition if any */
    xmlRelaxNGDefinePtr nextHash;       /* next define in defs/refs hash tables */
    short depth;                /* used for the cycle detection */
    short dflags;               /* define related flags */
    xmlRegexpPtr contModel;     /* a compiled content model if available */
};

/**
 * _xmlRelaxNG:
 *
 * A RelaxNGs definition
 */
struct _xmlRelaxNG {
    void *_private;             /* unused by the library for users or bindings */
    xmlRelaxNGGrammarPtr topgrammar;
    xmlDocPtr doc;

    int idref;                  /* requires idref checking */

    xmlHashTablePtr defs;       /* define */
    xmlHashTablePtr refs;       /* references */
    xmlRelaxNGDocumentPtr documents;    /* all the documents loaded */
    xmlRelaxNGIncludePtr includes;      /* all the includes loaded */
    int defNr;                  /* number of defines used */
    xmlRelaxNGDefinePtr *defTab;        /* pointer to the allocated definitions */

};

#define XML_RELAXNG_IN_ATTRIBUTE	(1 << 0)
#define XML_RELAXNG_IN_ONEORMORE	(1 << 1)
#define XML_RELAXNG_IN_LIST		(1 << 2)
#define XML_RELAXNG_IN_DATAEXCEPT	(1 << 3)
#define XML_RELAXNG_IN_START		(1 << 4)
#define XML_RELAXNG_IN_OOMGROUP		(1 << 5)
#define XML_RELAXNG_IN_OOMINTERLEAVE	(1 << 6)
#define XML_RELAXNG_IN_EXTERNALREF	(1 << 7)
#define XML_RELAXNG_IN_ANYEXCEPT	(1 << 8)
#define XML_RELAXNG_IN_NSEXCEPT		(1 << 9)

struct _xmlRelaxNGParserCtxt {
    void *userData;             /* user specific data block */
    xmlRelaxNGValidityErrorFunc error;  /* the callback in case of errors */
    xmlRelaxNGValidityWarningFunc warning;      /* the callback in case of warning */
    xmlStructuredErrorFunc serror;
    xmlRelaxNGValidErr err;

    xmlRelaxNGPtr schema;       /* The schema in use */
    xmlRelaxNGGrammarPtr grammar;       /* the current grammar */
    xmlRelaxNGGrammarPtr parentgrammar; /* the parent grammar */
    int flags;                  /* parser flags */
    int nbErrors;               /* number of errors at parse time */
    int nbWarnings;             /* number of warnings at parse time */
    const xmlChar *define;      /* the current define scope */
    xmlRelaxNGDefinePtr def;    /* the current define */

    int nbInterleaves;
    xmlHashTablePtr interleaves;        /* keep track of all the interleaves */

    xmlRelaxNGDocumentPtr documents;    /* all the documents loaded */
    xmlRelaxNGIncludePtr includes;      /* all the includes loaded */
    xmlChar *URL;
    xmlDocPtr document;

    int defNr;                  /* number of defines used */
    int defMax;                 /* number of defines aloocated */
    xmlRelaxNGDefinePtr *defTab;        /* pointer to the allocated definitions */

    const char *buffer;
    int size;

    /* the document stack */
    xmlRelaxNGDocumentPtr doc;  /* Current parsed external ref */
    int docNr;                  /* Depth of the parsing stack */
    int docMax;                 /* Max depth of the parsing stack */
    xmlRelaxNGDocumentPtr *docTab;      /* array of docs */

    /* the include stack */
    xmlRelaxNGIncludePtr inc;   /* Current parsed include */
    int incNr;                  /* Depth of the include parsing stack */
    int incMax;                 /* Max depth of the parsing stack */
    xmlRelaxNGIncludePtr *incTab;       /* array of incs */

    int idref;                  /* requires idref checking */

    /* used to compile content models */
    xmlAutomataPtr am;          /* the automata */
    xmlAutomataStatePtr state;  /* used to build the automata */

    int crng;			/* compact syntax and other flags */
    int freedoc;		/* need to free the document */
};

#define FLAGS_IGNORABLE		1
#define FLAGS_NEGATIVE		2
#define FLAGS_MIXED_CONTENT	4
#define FLAGS_NOERROR		8

/**
 * xmlRelaxNGInterleaveGroup:
 *
 * A RelaxNGs partition set associated to lists of definitions
 */
typedef struct _xmlRelaxNGInterleaveGroup xmlRelaxNGInterleaveGroup;
typedef xmlRelaxNGInterleaveGroup *xmlRelaxNGInterleaveGroupPtr;
struct _xmlRelaxNGInterleaveGroup {
    xmlRelaxNGDefinePtr rule;   /* the rule to satisfy */
    xmlRelaxNGDefinePtr *defs;  /* the array of element definitions */
    xmlRelaxNGDefinePtr *attrs; /* the array of attributes definitions */
};

#define IS_DETERMINIST		1
#define IS_NEEDCHECK		2

/**
 * xmlRelaxNGPartitions:
 *
 * A RelaxNGs partition associated to an interleave group
 */
typedef struct _xmlRelaxNGPartition xmlRelaxNGPartition;
typedef xmlRelaxNGPartition *xmlRelaxNGPartitionPtr;
struct _xmlRelaxNGPartition {
    int nbgroups;               /* number of groups in the partitions */
    xmlHashTablePtr triage;     /* hash table used to direct nodes to the
                                 * right group when possible */
    int flags;                  /* determinist ? */
    xmlRelaxNGInterleaveGroupPtr *groups;
};

/**
 * xmlRelaxNGValidState:
 *
 * A RelaxNGs validation state
 */
#define MAX_ATTR 20
typedef struct _xmlRelaxNGValidState xmlRelaxNGValidState;
typedef xmlRelaxNGValidState *xmlRelaxNGValidStatePtr;
struct _xmlRelaxNGValidState {
    xmlNodePtr node;            /* the current node */
    xmlNodePtr seq;             /* the sequence of children left to validate */
    int nbAttrs;                /* the number of attributes */
    int maxAttrs;               /* the size of attrs */
    int nbAttrLeft;             /* the number of attributes left to validate */
    xmlChar *value;             /* the value when operating on string */
    xmlChar *endvalue;          /* the end value when operating on string */
    xmlAttrPtr *attrs;          /* the array of attributes */
};

/**
 * xmlRelaxNGStates:
 *
 * A RelaxNGs container for validation state
 */
typedef struct _xmlRelaxNGStates xmlRelaxNGStates;
typedef xmlRelaxNGStates *xmlRelaxNGStatesPtr;
struct _xmlRelaxNGStates {
    int nbState;                /* the number of states */
    int maxState;               /* the size of the array */
    xmlRelaxNGValidStatePtr *tabState;
};

#define ERROR_IS_DUP	1

/**
 * xmlRelaxNGValidError:
 *
 * A RelaxNGs validation error
 */
typedef struct _xmlRelaxNGValidError xmlRelaxNGValidError;
typedef xmlRelaxNGValidError *xmlRelaxNGValidErrorPtr;
struct _xmlRelaxNGValidError {
    xmlRelaxNGValidErr err;     /* the error number */
    int flags;                  /* flags */
    xmlNodePtr node;            /* the current node */
    xmlNodePtr seq;             /* the current child */
    const xmlChar *arg1;        /* first arg */
    const xmlChar *arg2;        /* second arg */
};

/**
 * xmlRelaxNGValidCtxt:
 *
 * A RelaxNGs validation context
 */

struct _xmlRelaxNGValidCtxt {
    void *userData;             /* user specific data block */
    xmlRelaxNGValidityErrorFunc error;  /* the callback in case of errors */
    xmlRelaxNGValidityWarningFunc warning;      /* the callback in case of warning */
    xmlStructuredErrorFunc serror;
    int nbErrors;               /* number of errors in validation */

    xmlRelaxNGPtr schema;       /* The schema in use */
    xmlDocPtr doc;              /* the document being validated */
    int flags;                  /* validation flags */
    int depth;                  /* validation depth */
    int idref;                  /* requires idref checking */
    int errNo;                  /* the first error found */

    /*
     * Errors accumulated in branches may have to be stacked to be
     * provided back when it's sure they affect validation.
     */
    xmlRelaxNGValidErrorPtr err;        /* Last error */
    int errNr;                  /* Depth of the error stack */
    int errMax;                 /* Max depth of the error stack */
    xmlRelaxNGValidErrorPtr errTab;     /* stack of errors */

    xmlRelaxNGValidStatePtr state;      /* the current validation state */
    xmlRelaxNGStatesPtr states; /* the accumulated state list */

    xmlRelaxNGStatesPtr freeState;      /* the pool of free valid states */
    int freeStatesNr;
    int freeStatesMax;
    xmlRelaxNGStatesPtr *freeStates;    /* the pool of free state groups */

    /*
     * This is used for "progressive" validation
     */
    xmlRegExecCtxtPtr elem;     /* the current element regexp */
    int elemNr;                 /* the number of element validated */
    int elemMax;                /* the max depth of elements */
    xmlRegExecCtxtPtr *elemTab; /* the stack of regexp runtime */
    int pstate;                 /* progressive state */
    xmlNodePtr pnode;           /* the current node */
    xmlRelaxNGDefinePtr pdef;   /* the non-streamable definition */
    int perr;                   /* signal error in content model
                                 * outside the regexp */
};

/**
 * xmlRelaxNGInclude:
 *
 * Structure associated to a RelaxNGs document element
 */
struct _xmlRelaxNGInclude {
    xmlRelaxNGIncludePtr next;  /* keep a chain of includes */
    xmlChar *href;              /* the normalized href value */
    xmlDocPtr doc;              /* the associated XML document */
    xmlRelaxNGDefinePtr content;        /* the definitions */
    xmlRelaxNGPtr schema;       /* the schema */
};

/**
 * xmlRelaxNGDocument:
 *
 * Structure associated to a RelaxNGs document element
 */
struct _xmlRelaxNGDocument {
    xmlRelaxNGDocumentPtr next; /* keep a chain of documents */
    xmlChar *href;              /* the normalized href value */
    xmlDocPtr doc;              /* the associated XML document */
    xmlRelaxNGDefinePtr content;        /* the definitions */
    xmlRelaxNGPtr schema;       /* the schema */
};


/************************************************************************
 *									*
 * 		Some factorized error routines				*
 *									*
 ************************************************************************/

/**
 * xmlRngPErrMemory:
 * @ctxt:  an Relax-NG parser context
 * @extra:  extra informations
 *
 * Handle a redefinition of attribute error
 */
static void
xmlRngPErrMemory(xmlRelaxNGParserCtxtPtr ctxt, const char *extra)
{
    xmlStructuredErrorFunc schannel = NULL;
    xmlGenericErrorFunc channel = NULL;
    void *data = NULL;

    if (ctxt != NULL) {
        if (ctxt->serror != NULL)
	    schannel = ctxt->serror;
	else
	    channel = ctxt->error;
        data = ctxt->userData;
        ctxt->nbErrors++;
    }
    if (extra)
        __xmlRaiseError(schannel, channel, data,
                        NULL, NULL, XML_FROM_RELAXNGP,
                        XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, extra,
                        NULL, NULL, 0, 0,
                        "Memory allocation failed : %s\n", extra);
    else
        __xmlRaiseError(schannel, channel, data,
                        NULL, NULL, XML_FROM_RELAXNGP,
                        XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, NULL,
                        NULL, NULL, 0, 0, "Memory allocation failed\n");
}

/**
 * xmlRngVErrMemory:
 * @ctxt:  a Relax-NG validation context
 * @extra:  extra informations
 *
 * Handle a redefinition of attribute error
 */
static void
xmlRngVErrMemory(xmlRelaxNGValidCtxtPtr ctxt, const char *extra)
{
    xmlStructuredErrorFunc schannel = NULL;
    xmlGenericErrorFunc channel = NULL;
    void *data = NULL;

    if (ctxt != NULL) {
        if (ctxt->serror != NULL)
	    schannel = ctxt->serror;
	else
	    channel = ctxt->error;
        data = ctxt->userData;
        ctxt->nbErrors++;
    }
    if (extra)
        __xmlRaiseError(schannel, channel, data,
                        NULL, NULL, XML_FROM_RELAXNGV,
                        XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, extra,
                        NULL, NULL, 0, 0,
                        "Memory allocation failed : %s\n", extra);
    else
        __xmlRaiseError(schannel, channel, data,
                        NULL, NULL, XML_FROM_RELAXNGV,
                        XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, NULL,
                        NULL, NULL, 0, 0, "Memory allocation failed\n");
}

/**
 * xmlRngPErr:
 * @ctxt:  a Relax-NG parser context
 * @node:  the node raising the error
 * @error:  the error code
 * @msg:  message
 * @str1:  extra info
 * @str2:  extra info
 *
 * Handle a Relax NG Parsing error
 */
static void
xmlRngPErr(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node, int error,
           const char *msg, const xmlChar * str1, const xmlChar * str2)
{
    xmlStructuredErrorFunc schannel = NULL;
    xmlGenericErrorFunc channel = NULL;
    void *data = NULL;

    if (ctxt != NULL) {
        if (ctxt->serror != NULL)
	    schannel = ctxt->serror;
	else
	    channel = ctxt->error;
        data = ctxt->userData;
        ctxt->nbErrors++;
    }
    __xmlRaiseError(schannel, channel, data,
                    NULL, node, XML_FROM_RELAXNGP,
                    error, XML_ERR_ERROR, NULL, 0,
                    (const char *) str1, (const char *) str2, NULL, 0, 0,
                    msg, str1, str2);
}

/**
 * xmlRngVErr:
 * @ctxt:  a Relax-NG validation context
 * @node:  the node raising the error
 * @error:  the error code
 * @msg:  message
 * @str1:  extra info
 * @str2:  extra info
 *
 * Handle a Relax NG Validation error
 */
static void
xmlRngVErr(xmlRelaxNGValidCtxtPtr ctxt, xmlNodePtr node, int error,
           const char *msg, const xmlChar * str1, const xmlChar * str2)
{
    xmlStructuredErrorFunc schannel = NULL;
    xmlGenericErrorFunc channel = NULL;
    void *data = NULL;

    if (ctxt != NULL) {
        if (ctxt->serror != NULL)
	    schannel = ctxt->serror;
	else
	    channel = ctxt->error;
        data = ctxt->userData;
        ctxt->nbErrors++;
    }
    __xmlRaiseError(schannel, channel, data,
                    NULL, node, XML_FROM_RELAXNGV,
                    error, XML_ERR_ERROR, NULL, 0,
                    (const char *) str1, (const char *) str2, NULL, 0, 0,
                    msg, str1, str2);
}

/************************************************************************
 * 									*
 * 		Preliminary type checking interfaces			*
 * 									*
 ************************************************************************/

/**
 * xmlRelaxNGTypeHave:
 * @data:  data needed for the library
 * @type:  the type name
 * @value:  the value to check
 *
 * Function provided by a type library to check if a type is exported
 *
 * Returns 1 if yes, 0 if no and -1 in case of error.
 */
typedef int (*xmlRelaxNGTypeHave) (void *data, const xmlChar * type);

/**
 * xmlRelaxNGTypeCheck:
 * @data:  data needed for the library
 * @type:  the type name
 * @value:  the value to check
 * @result:  place to store the result if needed
 *
 * Function provided by a type library to check if a value match a type
 *
 * Returns 1 if yes, 0 if no and -1 in case of error.
 */
typedef int (*xmlRelaxNGTypeCheck) (void *data, const xmlChar * type,
                                    const xmlChar * value, void **result,
                                    xmlNodePtr node);

/**
 * xmlRelaxNGFacetCheck:
 * @data:  data needed for the library
 * @type:  the type name
 * @facet:  the facet name
 * @val:  the facet value
 * @strval:  the string value
 * @value:  the value to check
 *
 * Function provided by a type library to check a value facet
 *
 * Returns 1 if yes, 0 if no and -1 in case of error.
 */
typedef int (*xmlRelaxNGFacetCheck) (void *data, const xmlChar * type,
                                     const xmlChar * facet,
                                     const xmlChar * val,
                                     const xmlChar * strval, void *value);

/**
 * xmlRelaxNGTypeFree:
 * @data:  data needed for the library
 * @result:  the value to free
 *
 * Function provided by a type library to free a returned result
 */
typedef void (*xmlRelaxNGTypeFree) (void *data, void *result);

/**
 * xmlRelaxNGTypeCompare:
 * @data:  data needed for the library
 * @type:  the type name
 * @value1:  the first value
 * @value2:  the second value
 *
 * Function provided by a type library to compare two values accordingly
 * to a type.
 *
 * Returns 1 if yes, 0 if no and -1 in case of error.
 */
typedef int (*xmlRelaxNGTypeCompare) (void *data, const xmlChar * type,
                                      const xmlChar * value1,
                                      xmlNodePtr ctxt1,
                                      void *comp1,
                                      const xmlChar * value2,
                                      xmlNodePtr ctxt2);
typedef struct _xmlRelaxNGTypeLibrary xmlRelaxNGTypeLibrary;
typedef xmlRelaxNGTypeLibrary *xmlRelaxNGTypeLibraryPtr;
struct _xmlRelaxNGTypeLibrary {
    const xmlChar *namespace;   /* the datatypeLibrary value */
    void *data;                 /* data needed for the library */
    xmlRelaxNGTypeHave have;    /* the export function */
    xmlRelaxNGTypeCheck check;  /* the checking function */
    xmlRelaxNGTypeCompare comp; /* the compare function */
    xmlRelaxNGFacetCheck facet; /* the facet check function */
    xmlRelaxNGTypeFree freef;   /* the freeing function */
};

/************************************************************************
 * 									*
 * 			Allocation functions				*
 * 									*
 ************************************************************************/
static void xmlRelaxNGFreeGrammar(xmlRelaxNGGrammarPtr grammar);
static void xmlRelaxNGFreeDefine(xmlRelaxNGDefinePtr define);
static void xmlRelaxNGNormExtSpace(xmlChar * value);
static void xmlRelaxNGFreeInnerSchema(xmlRelaxNGPtr schema);
static int xmlRelaxNGEqualValidState(xmlRelaxNGValidCtxtPtr ctxt
                                     ATTRIBUTE_UNUSED,
                                     xmlRelaxNGValidStatePtr state1,
                                     xmlRelaxNGValidStatePtr state2);
static void xmlRelaxNGFreeValidState(xmlRelaxNGValidCtxtPtr ctxt,
                                     xmlRelaxNGValidStatePtr state);

/**
 * xmlRelaxNGFreeDocument:
 * @docu:  a document structure
 *
 * Deallocate a RelaxNG document structure.
 */
static void
xmlRelaxNGFreeDocument(xmlRelaxNGDocumentPtr docu)
{
    if (docu == NULL)
        return;

    if (docu->href != NULL)
        xmlFree(docu->href);
    if (docu->doc != NULL)
        xmlFreeDoc(docu->doc);
    if (docu->schema != NULL)
        xmlRelaxNGFreeInnerSchema(docu->schema);
    xmlFree(docu);
}

/**
 * xmlRelaxNGFreeDocumentList:
 * @docu:  a list of  document structure
 *
 * Deallocate a RelaxNG document structures.
 */
static void
xmlRelaxNGFreeDocumentList(xmlRelaxNGDocumentPtr docu)
{
    xmlRelaxNGDocumentPtr next;

    while (docu != NULL) {
        next = docu->next;
        xmlRelaxNGFreeDocument(docu);
        docu = next;
    }
}

/**
 * xmlRelaxNGFreeInclude:
 * @incl:  a include structure
 *
 * Deallocate a RelaxNG include structure.
 */
static void
xmlRelaxNGFreeInclude(xmlRelaxNGIncludePtr incl)
{
    if (incl == NULL)
        return;

    if (incl->href != NULL)
        xmlFree(incl->href);
    if (incl->doc != NULL)
        xmlFreeDoc(incl->doc);
    if (incl->schema != NULL)
        xmlRelaxNGFree(incl->schema);
    xmlFree(incl);
}

/**
 * xmlRelaxNGFreeIncludeList:
 * @incl:  a include structure list
 *
 * Deallocate a RelaxNG include structure.
 */
static void
xmlRelaxNGFreeIncludeList(xmlRelaxNGIncludePtr incl)
{
    xmlRelaxNGIncludePtr next;

    while (incl != NULL) {
        next = incl->next;
        xmlRelaxNGFreeInclude(incl);
        incl = next;
    }
}

/**
 * xmlRelaxNGNewRelaxNG:
 * @ctxt:  a Relax-NG validation context (optional)
 *
 * Allocate a new RelaxNG structure.
 *
 * Returns the newly allocated structure or NULL in case or error
 */
static xmlRelaxNGPtr
xmlRelaxNGNewRelaxNG(xmlRelaxNGParserCtxtPtr ctxt)
{
    xmlRelaxNGPtr ret;

    ret = (xmlRelaxNGPtr) xmlMalloc(sizeof(xmlRelaxNG));
    if (ret == NULL) {
        xmlRngPErrMemory(ctxt, NULL);
        return (NULL);
    }
    memset(ret, 0, sizeof(xmlRelaxNG));

    return (ret);
}

/**
 * xmlRelaxNGFreeInnerSchema:
 * @schema:  a schema structure
 *
 * Deallocate a RelaxNG schema structure.
 */
static void
xmlRelaxNGFreeInnerSchema(xmlRelaxNGPtr schema)
{
    if (schema == NULL)
        return;

    if (schema->doc != NULL)
        xmlFreeDoc(schema->doc);
    if (schema->defTab != NULL) {
        int i;

        for (i = 0; i < schema->defNr; i++)
            xmlRelaxNGFreeDefine(schema->defTab[i]);
        xmlFree(schema->defTab);
    }

    xmlFree(schema);
}

/**
 * xmlRelaxNGFree:
 * @schema:  a schema structure
 *
 * Deallocate a RelaxNG structure.
 */
void
xmlRelaxNGFree(xmlRelaxNGPtr schema)
{
    if (schema == NULL)
        return;

    if (schema->topgrammar != NULL)
        xmlRelaxNGFreeGrammar(schema->topgrammar);
    if (schema->doc != NULL)
        xmlFreeDoc(schema->doc);
    if (schema->documents != NULL)
        xmlRelaxNGFreeDocumentList(schema->documents);
    if (schema->includes != NULL)
        xmlRelaxNGFreeIncludeList(schema->includes);
    if (schema->defTab != NULL) {
        int i;

        for (i = 0; i < schema->defNr; i++)
            xmlRelaxNGFreeDefine(schema->defTab[i]);
        xmlFree(schema->defTab);
    }

    xmlFree(schema);
}

/**
 * xmlRelaxNGNewGrammar:
 * @ctxt:  a Relax-NG validation context (optional)
 *
 * Allocate a new RelaxNG grammar.
 *
 * Returns the newly allocated structure or NULL in case or error
 */
static xmlRelaxNGGrammarPtr
xmlRelaxNGNewGrammar(xmlRelaxNGParserCtxtPtr ctxt)
{
    xmlRelaxNGGrammarPtr ret;

    ret = (xmlRelaxNGGrammarPtr) xmlMalloc(sizeof(xmlRelaxNGGrammar));
    if (ret == NULL) {
        xmlRngPErrMemory(ctxt, NULL);
        return (NULL);
    }
    memset(ret, 0, sizeof(xmlRelaxNGGrammar));

    return (ret);
}

/**
 * xmlRelaxNGFreeGrammar:
 * @grammar:  a grammar structure
 *
 * Deallocate a RelaxNG grammar structure.
 */
static void
xmlRelaxNGFreeGrammar(xmlRelaxNGGrammarPtr grammar)
{
    if (grammar == NULL)
        return;

    if (grammar->children != NULL) {
        xmlRelaxNGFreeGrammar(grammar->children);
    }
    if (grammar->next != NULL) {
        xmlRelaxNGFreeGrammar(grammar->next);
    }
    if (grammar->refs != NULL) {
        xmlHashFree(grammar->refs, NULL);
    }
    if (grammar->defs != NULL) {
        xmlHashFree(grammar->defs, NULL);
    }

    xmlFree(grammar);
}

/**
 * xmlRelaxNGNewDefine:
 * @ctxt:  a Relax-NG validation context
 * @node:  the node in the input document.
 *
 * Allocate a new RelaxNG define.
 *
 * Returns the newly allocated structure or NULL in case or error
 */
static xmlRelaxNGDefinePtr
xmlRelaxNGNewDefine(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
{
    xmlRelaxNGDefinePtr ret;

    if (ctxt->defMax == 0) {
        ctxt->defMax = 16;
        ctxt->defNr = 0;
        ctxt->defTab = (xmlRelaxNGDefinePtr *)
            xmlMalloc(ctxt->defMax * sizeof(xmlRelaxNGDefinePtr));
        if (ctxt->defTab == NULL) {
            xmlRngPErrMemory(ctxt, "allocating define\n");
            return (NULL);
        }
    } else if (ctxt->defMax <= ctxt->defNr) {
        xmlRelaxNGDefinePtr *tmp;

        ctxt->defMax *= 2;
        tmp = (xmlRelaxNGDefinePtr *) xmlRealloc(ctxt->defTab,
                                                 ctxt->defMax *
                                                 sizeof
                                                 (xmlRelaxNGDefinePtr));
        if (tmp == NULL) {
            xmlRngPErrMemory(ctxt, "allocating define\n");
            return (NULL);
        }
        ctxt->defTab = tmp;
    }
    ret = (xmlRelaxNGDefinePtr) xmlMalloc(sizeof(xmlRelaxNGDefine));
    if (ret == NULL) {
        xmlRngPErrMemory(ctxt, "allocating define\n");
        return (NULL);
    }
    memset(ret, 0, sizeof(xmlRelaxNGDefine));
    ctxt->defTab[ctxt->defNr++] = ret;
    ret->node = node;
    ret->depth = -1;
    return (ret);
}

/**
 * xmlRelaxNGFreePartition:
 * @partitions:  a partition set structure
 *
 * Deallocate RelaxNG partition set structures.
 */
static void
xmlRelaxNGFreePartition(xmlRelaxNGPartitionPtr partitions)
{
    xmlRelaxNGInterleaveGroupPtr group;
    int j;

    if (partitions != NULL) {
        if (partitions->groups != NULL) {
            for (j = 0; j < partitions->nbgroups; j++) {
                group = partitions->groups[j];
                if (group != NULL) {
                    if (group->defs != NULL)
                        xmlFree(group->defs);
                    if (group->attrs != NULL)
                        xmlFree(group->attrs);
                    xmlFree(group);
                }
            }
            xmlFree(partitions->groups);
        }
        if (partitions->triage != NULL) {
            xmlHashFree(partitions->triage, NULL);
        }
        xmlFree(partitions);
    }
}

/**
 * xmlRelaxNGFreeDefine:
 * @define:  a define structure
 *
 * Deallocate a RelaxNG define structure.
 */
static void
xmlRelaxNGFreeDefine(xmlRelaxNGDefinePtr define)
{
    if (define == NULL)
        return;

    if ((define->type == XML_RELAXNG_VALUE) && (define->attrs != NULL)) {
        xmlRelaxNGTypeLibraryPtr lib;

        lib = (xmlRelaxNGTypeLibraryPtr) define->data;
        if ((lib != NULL) && (lib->freef != NULL))
            lib->freef(lib->data, (void *) define->attrs);
    }
    if ((define->data != NULL) && (define->type == XML_RELAXNG_INTERLEAVE))
        xmlRelaxNGFreePartition((xmlRelaxNGPartitionPtr) define->data);
    if ((define->data != NULL) && (define->type == XML_RELAXNG_CHOICE))
        xmlHashFree((xmlHashTablePtr) define->data, NULL);
    if (define->name != NULL)
        xmlFree(define->name);
    if (define->ns != NULL)
        xmlFree(define->ns);
    if (define->value != NULL)
        xmlFree(define->value);
    if (define->contModel != NULL)
        xmlRegFreeRegexp(define->contModel);
    xmlFree(define);
}

/**
 * xmlRelaxNGNewStates:
 * @ctxt:  a Relax-NG validation context
 * @size:  the default size for the container
 *
 * Allocate a new RelaxNG validation state container
 *
 * Returns the newly allocated structure or NULL in case or error
 */
static xmlRelaxNGStatesPtr
xmlRelaxNGNewStates(xmlRelaxNGValidCtxtPtr ctxt, int size)
{
    xmlRelaxNGStatesPtr ret;

    if ((ctxt != NULL) &&
        (ctxt->freeState != NULL) && (ctxt->freeStatesNr > 0)) {
        ctxt->freeStatesNr--;
        ret = ctxt->freeStates[ctxt->freeStatesNr];
        ret->nbState = 0;
        return (ret);
    }
    if (size < 16)
        size = 16;

    ret = (xmlRelaxNGStatesPtr) xmlMalloc(sizeof(xmlRelaxNGStates) +
                                          (size -
                                           1) *
                                          sizeof(xmlRelaxNGValidStatePtr));
    if (ret == NULL) {
        xmlRngVErrMemory(ctxt, "allocating states\n");
        return (NULL);
    }
    ret->nbState = 0;
    ret->maxState = size;
    ret->tabState = (xmlRelaxNGValidStatePtr *) xmlMalloc((size) *
                                                          sizeof
                                                          (xmlRelaxNGValidStatePtr));
    if (ret->tabState == NULL) {
        xmlRngVErrMemory(ctxt, "allocating states\n");
        xmlFree(ret);
        return (NULL);
    }
    return (ret);
}

/**
 * xmlRelaxNGAddStateUniq:
 * @ctxt:  a Relax-NG validation context
 * @states:  the states container
 * @state:  the validation state
 *
 * Add a RelaxNG validation state to the container without checking
 * for unicity.
 *
 * Return 1 in case of success and 0 if this is a duplicate and -1 on error
 */
static int
xmlRelaxNGAddStatesUniq(xmlRelaxNGValidCtxtPtr ctxt,
                        xmlRelaxNGStatesPtr states,
                        xmlRelaxNGValidStatePtr state)
{
    if (state == NULL) {
        return (-1);
    }
    if (states->nbState >= states->maxState) {
        xmlRelaxNGValidStatePtr *tmp;
        int size;

        size = states->maxState * 2;
        tmp = (xmlRelaxNGValidStatePtr *) xmlRealloc(states->tabState,
                                                     (size) *
                                                     sizeof
                                                     (xmlRelaxNGValidStatePtr));
        if (tmp == NULL) {
            xmlRngVErrMemory(ctxt, "adding states\n");
            return (-1);
        }
        states->tabState = tmp;
        states->maxState = size;
    }
    states->tabState[states->nbState++] = state;
    return (1);
}

/**
 * xmlRelaxNGAddState:
 * @ctxt:  a Relax-NG validation context
 * @states:  the states container
 * @state:  the validation state
 *
 * Add a RelaxNG validation state to the container
 *
 * Return 1 in case of success and 0 if this is a duplicate and -1 on error
 */
static int
xmlRelaxNGAddStates(xmlRelaxNGValidCtxtPtr ctxt,
                    xmlRelaxNGStatesPtr states,
                    xmlRelaxNGValidStatePtr state)
{
    int i;

    if (state == NULL) {
        return (-1);
    }
    if (states->nbState >= states->maxState) {
        xmlRelaxNGValidStatePtr *tmp;
        int size;

        size = states->maxState * 2;
        tmp = (xmlRelaxNGValidStatePtr *) xmlRealloc(states->tabState,
                                                     (size) *
                                                     sizeof
                                                     (xmlRelaxNGValidStatePtr));
        if (tmp == NULL) {
            xmlRngVErrMemory(ctxt, "adding states\n");
            return (-1);
        }
        states->tabState = tmp;
        states->maxState = size;
    }
    for (i = 0; i < states->nbState; i++) {
        if (xmlRelaxNGEqualValidState(ctxt, state, states->tabState[i])) {
            xmlRelaxNGFreeValidState(ctxt, state);
            return (0);
        }
    }
    states->tabState[states->nbState++] = state;
    return (1);
}

/**
 * xmlRelaxNGFreeStates:
 * @ctxt:  a Relax-NG validation context
 * @states:  teh container
 *
 * Free a RelaxNG validation state container
 */
static void
xmlRelaxNGFreeStates(xmlRelaxNGValidCtxtPtr ctxt,
                     xmlRelaxNGStatesPtr states)
{
    if (states == NULL)
        return;
    if ((ctxt != NULL) && (ctxt->freeStates == NULL)) {
        ctxt->freeStatesMax = 40;
        ctxt->freeStatesNr = 0;
        ctxt->freeStates = (xmlRelaxNGStatesPtr *)
            xmlMalloc(ctxt->freeStatesMax * sizeof(xmlRelaxNGStatesPtr));
        if (ctxt->freeStates == NULL) {
            xmlRngVErrMemory(ctxt, "storing states\n");
        }
    } else if ((ctxt != NULL)
               && (ctxt->freeStatesNr >= ctxt->freeStatesMax)) {
        xmlRelaxNGStatesPtr *tmp;

        tmp = (xmlRelaxNGStatesPtr *) xmlRealloc(ctxt->freeStates,
                                                 2 * ctxt->freeStatesMax *
                                                 sizeof
                                                 (xmlRelaxNGStatesPtr));
        if (tmp == NULL) {
            xmlRngVErrMemory(ctxt, "storing states\n");
            xmlFree(states->tabState);
            xmlFree(states);
            return;
        }
        ctxt->freeStates = tmp;
        ctxt->freeStatesMax *= 2;
    }
    if ((ctxt == NULL) || (ctxt->freeStates == NULL)) {
        xmlFree(states->tabState);
        xmlFree(states);
    } else {
        ctxt->freeStates[ctxt->freeStatesNr++] = states;
    }
}

/**
 * xmlRelaxNGNewValidState:
 * @ctxt:  a Relax-NG validation context
 * @node:  the current node or NULL for the document
 *
 * Allocate a new RelaxNG validation state
 *
 * Returns the newly allocated structure or NULL in case or error
 */
static xmlRelaxNGValidStatePtr
xmlRelaxNGNewValidState(xmlRelaxNGValidCtxtPtr ctxt, xmlNodePtr node)
{
    xmlRelaxNGValidStatePtr ret;
    xmlAttrPtr attr;
    xmlAttrPtr attrs[MAX_ATTR];
    int nbAttrs = 0;
    xmlNodePtr root = NULL;

    if (node == NULL) {
        root = xmlDocGetRootElement(ctxt->doc);
        if (root == NULL)
            return (NULL);
    } else {
        attr = node->properties;
        while (attr != NULL) {
            if (nbAttrs < MAX_ATTR)
                attrs[nbAttrs++] = attr;
            else
                nbAttrs++;
            attr = attr->next;
        }
    }
    if ((ctxt->freeState != NULL) && (ctxt->freeState->nbState > 0)) {
        ctxt->freeState->nbState--;
        ret = ctxt->freeState->tabState[ctxt->freeState->nbState];
    } else {
        ret =
            (xmlRelaxNGValidStatePtr)
            xmlMalloc(sizeof(xmlRelaxNGValidState));
        if (ret == NULL) {
            xmlRngVErrMemory(ctxt, "allocating states\n");
            return (NULL);
        }
        memset(ret, 0, sizeof(xmlRelaxNGValidState));
    }
    ret->value = NULL;
    ret->endvalue = NULL;
    if (node == NULL) {
        ret->node = (xmlNodePtr) ctxt->doc;
        ret->seq = root;
    } else {
        ret->node = node;
        ret->seq = node->children;
    }
    ret->nbAttrs = 0;
    if (nbAttrs > 0) {
        if (ret->attrs == NULL) {
            if (nbAttrs < 4)
                ret->maxAttrs = 4;
            else
                ret->maxAttrs = nbAttrs;
            ret->attrs = (xmlAttrPtr *) xmlMalloc(ret->maxAttrs *
                                                  sizeof(xmlAttrPtr));
            if (ret->attrs == NULL) {
                xmlRngVErrMemory(ctxt, "allocating states\n");
                return (ret);
            }
        } else if (ret->maxAttrs < nbAttrs) {
            xmlAttrPtr *tmp;

            tmp = (xmlAttrPtr *) xmlRealloc(ret->attrs, nbAttrs *
                                            sizeof(xmlAttrPtr));
            if (tmp == NULL) {
                xmlRngVErrMemory(ctxt, "allocating states\n");
                return (ret);
            }
            ret->attrs = tmp;
            ret->maxAttrs = nbAttrs;
        }
        ret->nbAttrs = nbAttrs;
        if (nbAttrs < MAX_ATTR) {
            memcpy(ret->attrs, attrs, sizeof(xmlAttrPtr) * nbAttrs);
        } else {
            attr = node->properties;
            nbAttrs = 0;
            while (attr != NULL) {
                ret->attrs[nbAttrs++] = attr;
                attr = attr->next;
            }
        }
    }
    ret->nbAttrLeft = ret->nbAttrs;
    return (ret);
}

/**
 * xmlRelaxNGCopyValidState:
 * @ctxt:  a Relax-NG validation context
 * @state:  a validation state
 *
 * Copy the validation state
 *
 * Returns the newly allocated structure or NULL in case or error
 */
static xmlRelaxNGValidStatePtr
xmlRelaxNGCopyValidState(xmlRelaxNGValidCtxtPtr ctxt,
                         xmlRelaxNGValidStatePtr state)
{
    xmlRelaxNGValidStatePtr ret;
    unsigned int maxAttrs;
    xmlAttrPtr *attrs;

    if (state == NULL)
        return (NULL);
    if ((ctxt->freeState != NULL) && (ctxt->freeState->nbState > 0)) {
        ctxt->freeState->nbState--;
        ret = ctxt->freeState->tabState[ctxt->freeState->nbState];
    } else {
        ret =
            (xmlRelaxNGValidStatePtr)
            xmlMalloc(sizeof(xmlRelaxNGValidState));
        if (ret == NULL) {
            xmlRngVErrMemory(ctxt, "allocating states\n");
            return (NULL);
        }
        memset(ret, 0, sizeof(xmlRelaxNGValidState));
    }
    attrs = ret->attrs;
    maxAttrs = ret->maxAttrs;
    memcpy(ret, state, sizeof(xmlRelaxNGValidState));
    ret->attrs = attrs;
    ret->maxAttrs = maxAttrs;
    if (state->nbAttrs > 0) {
        if (ret->attrs == NULL) {
            ret->maxAttrs = state->maxAttrs;
            ret->attrs = (xmlAttrPtr *) xmlMalloc(ret->maxAttrs *
                                                  sizeof(xmlAttrPtr));
            if (ret->attrs == NULL) {
                xmlRngVErrMemory(ctxt, "allocating states\n");
                ret->nbAttrs = 0;
                return (ret);
            }
        } else if (ret->maxAttrs < state->nbAttrs) {
            xmlAttrPtr *tmp;

            tmp = (xmlAttrPtr *) xmlRealloc(ret->attrs, state->maxAttrs *
                                            sizeof(xmlAttrPtr));
            if (tmp == NULL) {
                xmlRngVErrMemory(ctxt, "allocating states\n");
                ret->nbAttrs = 0;
                return (ret);
            }
            ret->maxAttrs = state->maxAttrs;
            ret->attrs = tmp;
        }
        memcpy(ret->attrs, state->attrs,
               state->nbAttrs * sizeof(xmlAttrPtr));
    }
    return (ret);
}

/**
 * xmlRelaxNGEqualValidState:
 * @ctxt:  a Relax-NG validation context
 * @state1:  a validation state
 * @state2:  a validation state
 *
 * Compare the validation states for equality
 *
 * Returns 1 if equald, 0 otherwise
 */
static int
xmlRelaxNGEqualValidState(xmlRelaxNGValidCtxtPtr ctxt ATTRIBUTE_UNUSED,
                          xmlRelaxNGValidStatePtr state1,
                          xmlRelaxNGValidStatePtr state2)
{
    int i;

    if ((state1 == NULL) || (state2 == NULL))
        return (0);
    if (state1 == state2)
        return (1);
    if (state1->node != state2->node)
        return (0);
    if (state1->seq != state2->seq)
        return (0);
    if (state1->nbAttrLeft != state2->nbAttrLeft)
        return (0);
    if (state1->nbAttrs != state2->nbAttrs)
        return (0);
    if (state1->endvalue != state2->endvalue)
        return (0);
    if ((state1->value != state2->value) &&
        (!xmlStrEqual(state1->value, state2->value)))
        return (0);
    for (i = 0; i < state1->nbAttrs; i++) {
        if (state1->attrs[i] != state2->attrs[i])
            return (0);
    }
    return (1);
}

/**
 * xmlRelaxNGFreeValidState:
 * @state:  a validation state structure
 *
 * Deallocate a RelaxNG validation state structure.
 */
static void
xmlRelaxNGFreeValidState(xmlRelaxNGValidCtxtPtr ctxt,
                         xmlRelaxNGValidStatePtr state)
{
    if (state == NULL)
        return;

    if ((ctxt != NULL) && (ctxt->freeState == NULL)) {
        ctxt->freeState = xmlRelaxNGNewStates(ctxt, 40);
    }
    if ((ctxt == NULL) || (ctxt->freeState == NULL)) {
        if (state->attrs != NULL)
            xmlFree(state->attrs);
        xmlFree(state);
    } else {
        xmlRelaxNGAddStatesUniq(ctxt, ctxt->freeState, state);
    }
}

/************************************************************************
 * 									*
 * 			Semi internal functions				*
 * 									*
 ************************************************************************/

/**
 * xmlRelaxParserSetFlag:
 * @ctxt: a RelaxNG parser context
 * @flags: a set of flags values
 *
 * Semi private function used to pass informations to a parser context
 * which are a combination of xmlRelaxNGParserFlag .
 *
 * Returns 0 if success and -1 in case of error
 */
int
xmlRelaxParserSetFlag(xmlRelaxNGParserCtxtPtr ctxt, int flags)
{
    if (ctxt == NULL) return(-1);
    if (flags & XML_RELAXNGP_FREE_DOC) {
        ctxt->crng |= XML_RELAXNGP_FREE_DOC;
	flags -= XML_RELAXNGP_FREE_DOC;
    }
    if (flags & XML_RELAXNGP_CRNG) {
        ctxt->crng |= XML_RELAXNGP_CRNG;
	flags -= XML_RELAXNGP_CRNG;
    }
    if (flags != 0) return(-1);
    return(0);
}

/************************************************************************
 * 									*
 * 			Document functions				*
 * 									*
 ************************************************************************/
static xmlDocPtr xmlRelaxNGCleanupDoc(xmlRelaxNGParserCtxtPtr ctxt,
                                      xmlDocPtr doc);

/**
 * xmlRelaxNGIncludePush:
 * @ctxt:  the parser context
 * @value:  the element doc
 *
 * Pushes a new include on top of the include stack
 *
 * Returns 0 in case of error, the index in the stack otherwise
 */
static int
xmlRelaxNGIncludePush(xmlRelaxNGParserCtxtPtr ctxt,
                      xmlRelaxNGIncludePtr value)
{
    if (ctxt->incTab == NULL) {
        ctxt->incMax = 4;
        ctxt->incNr = 0;
        ctxt->incTab =
            (xmlRelaxNGIncludePtr *) xmlMalloc(ctxt->incMax *
                                               sizeof(ctxt->incTab[0]));
        if (ctxt->incTab == NULL) {
            xmlRngPErrMemory(ctxt, "allocating include\n");
            return (0);
        }
    }
    if (ctxt->incNr >= ctxt->incMax) {
        ctxt->incMax *= 2;
        ctxt->incTab =
            (xmlRelaxNGIncludePtr *) xmlRealloc(ctxt->incTab,
                                                ctxt->incMax *
                                                sizeof(ctxt->incTab[0]));
        if (ctxt->incTab == NULL) {
            xmlRngPErrMemory(ctxt, "allocating include\n");
            return (0);
        }
    }
    ctxt->incTab[ctxt->incNr] = value;
    ctxt->inc = value;
    return (ctxt->incNr++);
}

/**
 * xmlRelaxNGIncludePop:
 * @ctxt: the parser context
 *
 * Pops the top include from the include stack
 *
 * Returns the include just removed
 */
static xmlRelaxNGIncludePtr
xmlRelaxNGIncludePop(xmlRelaxNGParserCtxtPtr ctxt)
{
    xmlRelaxNGIncludePtr ret;

    if (ctxt->incNr <= 0)
        return (NULL);
    ctxt->incNr--;
    if (ctxt->incNr > 0)
        ctxt->inc = ctxt->incTab[ctxt->incNr - 1];
    else
        ctxt->inc = NULL;
    ret = ctxt->incTab[ctxt->incNr];
    ctxt->incTab[ctxt->incNr] = NULL;
    return (ret);
}

/**
 * xmlRelaxNGRemoveRedefine:
 * @ctxt: the parser context
 * @URL:  the normalized URL
 * @target:  the included target
 * @name:  the define name to eliminate
 *
 * Applies the elimination algorithm of 4.7
 *
 * Returns 0 in case of error, 1 in case of success.
 */
static int
xmlRelaxNGRemoveRedefine(xmlRelaxNGParserCtxtPtr ctxt,
                         const xmlChar * URL ATTRIBUTE_UNUSED,
                         xmlNodePtr target, const xmlChar * name)
{
    int found = 0;
    xmlNodePtr tmp, tmp2;
    xmlChar *name2;

#ifdef DEBUG_INCLUDE
    if (name == NULL)
        xmlGenericError(xmlGenericErrorContext,
                        "Elimination of <include> start from %s\n", URL);
    else
        xmlGenericError(xmlGenericErrorContext,
                        "Elimination of <include> define %s from %s\n",
                        name, URL);
#endif
    tmp = target;
    while (tmp != NULL) {
        tmp2 = tmp->next;
        if ((name == NULL) && (IS_RELAXNG(tmp, "start"))) {
            found = 1;
            xmlUnlinkNode(tmp);
            xmlFreeNode(tmp);
        } else if ((name != NULL) && (IS_RELAXNG(tmp, "define"))) {
            name2 = xmlGetProp(tmp, BAD_CAST "name");
            xmlRelaxNGNormExtSpace(name2);
            if (name2 != NULL) {
                if (xmlStrEqual(name, name2)) {
                    found = 1;
                    xmlUnlinkNode(tmp);
                    xmlFreeNode(tmp);
                }
                xmlFree(name2);
            }
        } else if (IS_RELAXNG(tmp, "include")) {
            xmlChar *href = NULL;
            xmlRelaxNGDocumentPtr inc = tmp->psvi;

            if ((inc != NULL) && (inc->doc != NULL) &&
                (inc->doc->children != NULL)) {

                if (xmlStrEqual
                    (inc->doc->children->name, BAD_CAST "grammar")) {
#ifdef DEBUG_INCLUDE
                    href = xmlGetProp(tmp, BAD_CAST "href");
#endif
                    if (xmlRelaxNGRemoveRedefine(ctxt, href,
                                                 inc->doc->children->
                                                 children, name) == 1) {
                        found = 1;
                    }
#ifdef DEBUG_INCLUDE
                    if (href != NULL)
                        xmlFree(href);
#endif
                }
            }
        }
        tmp = tmp2;
    }
    return (found);
}

/**
 * xmlRelaxNGLoadInclude:
 * @ctxt: the parser context
 * @URL:  the normalized URL
 * @node: the include node.
 * @ns:  the namespace passed from the context.
 *
 * First lookup if the document is already loaded into the parser context,
 * check against recursion. If not found the resource is loaded and
 * the content is preprocessed before being returned back to the caller.
 *
 * Returns the xmlRelaxNGIncludePtr or NULL in case of error
 */
static xmlRelaxNGIncludePtr
xmlRelaxNGLoadInclude(xmlRelaxNGParserCtxtPtr ctxt, const xmlChar * URL,
                      xmlNodePtr node, const xmlChar * ns)
{
    xmlRelaxNGIncludePtr ret = NULL;
    xmlDocPtr doc;
    int i;
    xmlNodePtr root, cur;

#ifdef DEBUG_INCLUDE
    xmlGenericError(xmlGenericErrorContext,
                    "xmlRelaxNGLoadInclude(%s)\n", URL);
#endif

    /*
     * check against recursion in the stack
     */
    for (i = 0; i < ctxt->incNr; i++) {
        if (xmlStrEqual(ctxt->incTab[i]->href, URL)) {
            xmlRngPErr(ctxt, NULL, XML_RNGP_INCLUDE_RECURSE,
                       "Detected an Include recursion for %s\n", URL,
                       NULL);
            return (NULL);
        }
    }

    /*
     * load the document
     */
    doc = xmlReadFile((const char *) URL,NULL,0);
    if (doc == NULL) {
        xmlRngPErr(ctxt, node, XML_RNGP_PARSE_ERROR,
                   "xmlRelaxNG: could not load %s\n", URL, NULL);
        return (NULL);
    }
#ifdef DEBUG_INCLUDE
    xmlGenericError(xmlGenericErrorContext, "Parsed %s Okay\n", URL);
#endif

    /*
     * Allocate the document structures and register it first.
     */
    ret = (xmlRelaxNGIncludePtr) xmlMalloc(sizeof(xmlRelaxNGInclude));
    if (ret == NULL) {
        xmlRngPErrMemory(ctxt, "allocating include\n");
        xmlFreeDoc(doc);
        return (NULL);
    }
    memset(ret, 0, sizeof(xmlRelaxNGInclude));
    ret->doc = doc;
    ret->href = xmlStrdup(URL);
    ret->next = ctxt->includes;
    ctxt->includes = ret;

    /*
     * transmit the ns if needed
     */
    if (ns != NULL) {
        root = xmlDocGetRootElement(doc);
        if (root != NULL) {
            if (xmlHasProp(root, BAD_CAST "ns") == NULL) {
                xmlSetProp(root, BAD_CAST "ns", ns);
            }
        }
    }

    /*
     * push it on the stack
     */
    xmlRelaxNGIncludePush(ctxt, ret);

    /*
     * Some preprocessing of the document content, this include recursing
     * in the include stack.
     */
#ifdef DEBUG_INCLUDE
    xmlGenericError(xmlGenericErrorContext, "cleanup of %s\n", URL);
#endif

    doc = xmlRelaxNGCleanupDoc(ctxt, doc);
    if (doc == NULL) {
        ctxt->inc = NULL;
        return (NULL);
    }

    /*
     * Pop up the include from the stack
     */
    xmlRelaxNGIncludePop(ctxt);

#ifdef DEBUG_INCLUDE
    xmlGenericError(xmlGenericErrorContext, "Checking of %s\n", URL);
#endif
    /*
     * Check that the top element is a grammar
     */
    root = xmlDocGetRootElement(doc);
    if (root == NULL) {
        xmlRngPErr(ctxt, node, XML_RNGP_EMPTY,
                   "xmlRelaxNG: included document is empty %s\n", URL,
                   NULL);
        return (NULL);
    }
    if (!IS_RELAXNG(root, "grammar")) {
        xmlRngPErr(ctxt, node, XML_RNGP_GRAMMAR_MISSING,
                   "xmlRelaxNG: included document %s root is not a grammar\n",
                   URL, NULL);
        return (NULL);
    }

    /*
     * Elimination of redefined rules in the include.
     */
    cur = node->children;
    while (cur != NULL) {
        if (IS_RELAXNG(cur, "start")) {
            int found = 0;

            found =
                xmlRelaxNGRemoveRedefine(ctxt, URL, root->children, NULL);
            if (!found) {
                xmlRngPErr(ctxt, node, XML_RNGP_START_MISSING,
                           "xmlRelaxNG: include %s has a start but not the included grammar\n",
                           URL, NULL);
            }
        } else if (IS_RELAXNG(cur, "define")) {
            xmlChar *name;

            name = xmlGetProp(cur, BAD_CAST "name");
            if (name == NULL) {
                xmlRngPErr(ctxt, node, XML_RNGP_NAME_MISSING,
                           "xmlRelaxNG: include %s has define without name\n",
                           URL, NULL);
            } else {
                int found;

                xmlRelaxNGNormExtSpace(name);
                found = xmlRelaxNGRemoveRedefine(ctxt, URL,
                                                 root->children, name);
                if (!found) {
                    xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_MISSING,
                               "xmlRelaxNG: include %s has a define %s but not the included grammar\n",
                               URL, name);
                }
                xmlFree(name);
            }
        }
        cur = cur->next;
    }


    return (ret);
}

/**
 * xmlRelaxNGValidErrorPush:
 * @ctxt:  the validation context
 * @err:  the error code
 * @arg1:  the first string argument
 * @arg2:  the second string argument
 * @dup:  arg need to be duplicated
 *
 * Pushes a new error on top of the error stack
 *
 * Returns 0 in case of error, the index in the stack otherwise
 */
static int
xmlRelaxNGValidErrorPush(xmlRelaxNGValidCtxtPtr ctxt,
                         xmlRelaxNGValidErr err, const xmlChar * arg1,
                         const xmlChar * arg2, int dup)
{
    xmlRelaxNGValidErrorPtr cur;

#ifdef DEBUG_ERROR
    xmlGenericError(xmlGenericErrorContext,
                    "Pushing error %d at %d on stack\n", err, ctxt->errNr);
#endif
    if (ctxt->errTab == NULL) {
        ctxt->errMax = 8;
        ctxt->errNr = 0;
        ctxt->errTab =
            (xmlRelaxNGValidErrorPtr) xmlMalloc(ctxt->errMax *
                                                sizeof
                                                (xmlRelaxNGValidError));
        if (ctxt->errTab == NULL) {
            xmlRngVErrMemory(ctxt, "pushing error\n");
            return (0);
        }
        ctxt->err = NULL;
    }
    if (ctxt->errNr >= ctxt->errMax) {
        ctxt->errMax *= 2;
        ctxt->errTab =
            (xmlRelaxNGValidErrorPtr) xmlRealloc(ctxt->errTab,
                                                 ctxt->errMax *
                                                 sizeof
                                                 (xmlRelaxNGValidError));
        if (ctxt->errTab == NULL) {
            xmlRngVErrMemory(ctxt, "pushing error\n");
            return (0);
        }
        ctxt->err = &ctxt->errTab[ctxt->errNr - 1];
    }
    if ((ctxt->err != NULL) && (ctxt->state != NULL) &&
        (ctxt->err->node == ctxt->state->node) && (ctxt->err->err == err))
        return (ctxt->errNr);
    cur = &ctxt->errTab[ctxt->errNr];
    cur->err = err;
    if (dup) {
        cur->arg1 = xmlStrdup(arg1);
        cur->arg2 = xmlStrdup(arg2);
        cur->flags = ERROR_IS_DUP;
    } else {
        cur->arg1 = arg1;
        cur->arg2 = arg2;
        cur->flags = 0;
    }
    if (ctxt->state != NULL) {
        cur->node = ctxt->state->node;
        cur->seq = ctxt->state->seq;
    } else {
        cur->node = NULL;
        cur->seq = NULL;
    }
    ctxt->err = cur;
    return (ctxt->errNr++);
}

/**
 * xmlRelaxNGValidErrorPop:
 * @ctxt: the validation context
 *
 * Pops the top error from the error stack
 */
static void
xmlRelaxNGValidErrorPop(xmlRelaxNGValidCtxtPtr ctxt)
{
    xmlRelaxNGValidErrorPtr cur;

    if (ctxt->errNr <= 0) {
        ctxt->err = NULL;
        return;
    }
    ctxt->errNr--;
    if (ctxt->errNr > 0)
        ctxt->err = &ctxt->errTab[ctxt->errNr - 1];
    else
        ctxt->err = NULL;
    cur = &ctxt->errTab[ctxt->errNr];
    if (cur->flags & ERROR_IS_DUP) {
        if (cur->arg1 != NULL)
            xmlFree((xmlChar *) cur->arg1);
        cur->arg1 = NULL;
        if (cur->arg2 != NULL)
            xmlFree((xmlChar *) cur->arg2);
        cur->arg2 = NULL;
        cur->flags = 0;
    }
}

/**
 * xmlRelaxNGDocumentPush:
 * @ctxt:  the parser context
 * @value:  the element doc
 *
 * Pushes a new doc on top of the doc stack
 *
 * Returns 0 in case of error, the index in the stack otherwise
 */
static int
xmlRelaxNGDocumentPush(xmlRelaxNGParserCtxtPtr ctxt,
                       xmlRelaxNGDocumentPtr value)
{
    if (ctxt->docTab == NULL) {
        ctxt->docMax = 4;
        ctxt->docNr = 0;
        ctxt->docTab =
            (xmlRelaxNGDocumentPtr *) xmlMalloc(ctxt->docMax *
                                                sizeof(ctxt->docTab[0]));
        if (ctxt->docTab == NULL) {
            xmlRngPErrMemory(ctxt, "adding document\n");
            return (0);
        }
    }
    if (ctxt->docNr >= ctxt->docMax) {
        ctxt->docMax *= 2;
        ctxt->docTab =
            (xmlRelaxNGDocumentPtr *) xmlRealloc(ctxt->docTab,
                                                 ctxt->docMax *
                                                 sizeof(ctxt->docTab[0]));
        if (ctxt->docTab == NULL) {
            xmlRngPErrMemory(ctxt, "adding document\n");
            return (0);
        }
    }
    ctxt->docTab[ctxt->docNr] = value;
    ctxt->doc = value;
    return (ctxt->docNr++);
}

/**
 * xmlRelaxNGDocumentPop:
 * @ctxt: the parser context
 *
 * Pops the top doc from the doc stack
 *
 * Returns the doc just removed
 */
static xmlRelaxNGDocumentPtr
xmlRelaxNGDocumentPop(xmlRelaxNGParserCtxtPtr ctxt)
{
    xmlRelaxNGDocumentPtr ret;

    if (ctxt->docNr <= 0)
        return (NULL);
    ctxt->docNr--;
    if (ctxt->docNr > 0)
        ctxt->doc = ctxt->docTab[ctxt->docNr - 1];
    else
        ctxt->doc = NULL;
    ret = ctxt->docTab[ctxt->docNr];
    ctxt->docTab[ctxt->docNr] = NULL;
    return (ret);
}

/**
 * xmlRelaxNGLoadExternalRef:
 * @ctxt: the parser context
 * @URL:  the normalized URL
 * @ns:  the inherited ns if any
 *
 * First lookup if the document is already loaded into the parser context,
 * check against recursion. If not found the resource is loaded and
 * the content is preprocessed before being returned back to the caller.
 *
 * Returns the xmlRelaxNGDocumentPtr or NULL in case of error
 */
static xmlRelaxNGDocumentPtr
xmlRelaxNGLoadExternalRef(xmlRelaxNGParserCtxtPtr ctxt,
                          const xmlChar * URL, const xmlChar * ns)
{
    xmlRelaxNGDocumentPtr ret = NULL;
    xmlDocPtr doc;
    xmlNodePtr root;
    int i;

    /*
     * check against recursion in the stack
     */
    for (i = 0; i < ctxt->docNr; i++) {
        if (xmlStrEqual(ctxt->docTab[i]->href, URL)) {
            xmlRngPErr(ctxt, NULL, XML_RNGP_EXTERNALREF_RECURSE,
                       "Detected an externalRef recursion for %s\n", URL,
                       NULL);
            return (NULL);
        }
    }

    /*
     * load the document
     */
    doc = xmlReadFile((const char *) URL,NULL,0);
    if (doc == NULL) {
        xmlRngPErr(ctxt, NULL, XML_RNGP_PARSE_ERROR,
                   "xmlRelaxNG: could not load %s\n", URL, NULL);
        return (NULL);
    }

    /*
     * Allocate the document structures and register it first.
     */
    ret = (xmlRelaxNGDocumentPtr) xmlMalloc(sizeof(xmlRelaxNGDocument));
    if (ret == NULL) {
        xmlRngPErr(ctxt, (xmlNodePtr) doc, XML_ERR_NO_MEMORY,
                   "xmlRelaxNG: allocate memory for doc %s\n", URL, NULL);
        xmlFreeDoc(doc);
        return (NULL);
    }
    memset(ret, 0, sizeof(xmlRelaxNGDocument));
    ret->doc = doc;
    ret->href = xmlStrdup(URL);
    ret->next = ctxt->documents;
    ctxt->documents = ret;

    /*
     * transmit the ns if needed
     */
    if (ns != NULL) {
        root = xmlDocGetRootElement(doc);
        if (root != NULL) {
            if (xmlHasProp(root, BAD_CAST "ns") == NULL) {
                xmlSetProp(root, BAD_CAST "ns", ns);
            }
        }
    }

    /*
     * push it on the stack and register it in the hash table
     */
    xmlRelaxNGDocumentPush(ctxt, ret);

    /*
     * Some preprocessing of the document content
     */
    doc = xmlRelaxNGCleanupDoc(ctxt, doc);
    if (doc == NULL) {
        ctxt->doc = NULL;
        return (NULL);
    }

    xmlRelaxNGDocumentPop(ctxt);

    return (ret);
}

/************************************************************************
 * 									*
 * 			Error functions					*
 * 									*
 ************************************************************************/

#define VALID_ERR(a) xmlRelaxNGAddValidError(ctxt, a, NULL, NULL, 0);
#define VALID_ERR2(a, b) xmlRelaxNGAddValidError(ctxt, a, b, NULL, 0);
#define VALID_ERR3(a, b, c) xmlRelaxNGAddValidError(ctxt, a, b, c, 0);
#define VALID_ERR2P(a, b) xmlRelaxNGAddValidError(ctxt, a, b, NULL, 1);
#define VALID_ERR3P(a, b, c) xmlRelaxNGAddValidError(ctxt, a, b, c, 1);

static const char *
xmlRelaxNGDefName(xmlRelaxNGDefinePtr def)
{
    if (def == NULL)
        return ("none");
    switch (def->type) {
        case XML_RELAXNG_EMPTY:
            return ("empty");
        case XML_RELAXNG_NOT_ALLOWED:
            return ("notAllowed");
        case XML_RELAXNG_EXCEPT:
            return ("except");
        case XML_RELAXNG_TEXT:
            return ("text");
        case XML_RELAXNG_ELEMENT:
            return ("element");
        case XML_RELAXNG_DATATYPE:
            return ("datatype");
        case XML_RELAXNG_VALUE:
            return ("value");
        case XML_RELAXNG_LIST:
            return ("list");
        case XML_RELAXNG_ATTRIBUTE:
            return ("attribute");
        case XML_RELAXNG_DEF:
            return ("def");
        case XML_RELAXNG_REF:
            return ("ref");
        case XML_RELAXNG_EXTERNALREF:
            return ("externalRef");
        case XML_RELAXNG_PARENTREF:
            return ("parentRef");
        case XML_RELAXNG_OPTIONAL:
            return ("optional");
        case XML_RELAXNG_ZEROORMORE:
            return ("zeroOrMore");
        case XML_RELAXNG_ONEORMORE:
            return ("oneOrMore");
        case XML_RELAXNG_CHOICE:
            return ("choice");
        case XML_RELAXNG_GROUP:
            return ("group");
        case XML_RELAXNG_INTERLEAVE:
            return ("interleave");
        case XML_RELAXNG_START:
            return ("start");
        case XML_RELAXNG_NOOP:
            return ("noop");
        case XML_RELAXNG_PARAM:
            return ("param");
    }
    return ("unknown");
}

/**
 * xmlRelaxNGGetErrorString:
 * @err:  the error code
 * @arg1:  the first string argument
 * @arg2:  the second string argument
 *
 * computes a formatted error string for the given error code and args
 *
 * Returns the error string, it must be deallocated by the caller
 */
static xmlChar *
xmlRelaxNGGetErrorString(xmlRelaxNGValidErr err, const xmlChar * arg1,
                         const xmlChar * arg2)
{
    char msg[1000];

    if (arg1 == NULL)
        arg1 = BAD_CAST "";
    if (arg2 == NULL)
        arg2 = BAD_CAST "";

    msg[0] = 0;
    switch (err) {
        case XML_RELAXNG_OK:
            return (NULL);
        case XML_RELAXNG_ERR_MEMORY:
            return (xmlCharStrdup("out of memory\n"));
        case XML_RELAXNG_ERR_TYPE:
            snprintf(msg, 1000, "failed to validate type %s\n", arg1);
            break;
        case XML_RELAXNG_ERR_TYPEVAL:
            snprintf(msg, 1000, "Type %s doesn't allow value '%s'\n", arg1,
                     arg2);
            break;
        case XML_RELAXNG_ERR_DUPID:
            snprintf(msg, 1000, "ID %s redefined\n", arg1);
            break;
        case XML_RELAXNG_ERR_TYPECMP:
            snprintf(msg, 1000, "failed to compare type %s\n", arg1);
            break;
        case XML_RELAXNG_ERR_NOSTATE:
            return (xmlCharStrdup("Internal error: no state\n"));
        case XML_RELAXNG_ERR_NODEFINE:
            return (xmlCharStrdup("Internal error: no define\n"));
        case XML_RELAXNG_ERR_INTERNAL:
            snprintf(msg, 1000, "Internal error: %s\n", arg1);
            break;
        case XML_RELAXNG_ERR_LISTEXTRA:
            snprintf(msg, 1000, "Extra data in list: %s\n", arg1);
            break;
        case XML_RELAXNG_ERR_INTERNODATA:
            return (xmlCharStrdup
                    ("Internal: interleave block has no data\n"));
        case XML_RELAXNG_ERR_INTERSEQ:
            return (xmlCharStrdup("Invalid sequence in interleave\n"));
        case XML_RELAXNG_ERR_INTEREXTRA:
            snprintf(msg, 1000, "Extra element %s in interleave\n", arg1);
            break;
        case XML_RELAXNG_ERR_ELEMNAME:
            snprintf(msg, 1000, "Expecting element %s, got %s\n", arg1,
                     arg2);
            break;
        case XML_RELAXNG_ERR_ELEMNONS:
            snprintf(msg, 1000, "Expecting a namespace for element %s\n",
                     arg1);
            break;
        case XML_RELAXNG_ERR_ELEMWRONGNS:
            snprintf(msg, 1000,
                     "Element %s has wrong namespace: expecting %s\n", arg1,
                     arg2);
            break;
        case XML_RELAXNG_ERR_ELEMWRONG:
            snprintf(msg, 1000, "Did not expect element %s there\n", arg1);
            break;
        case XML_RELAXNG_ERR_TEXTWRONG:
            snprintf(msg, 1000,
                     "Did not expect text in element %s content\n", arg1);
            break;
        case XML_RELAXNG_ERR_ELEMEXTRANS:
            snprintf(msg, 1000, "Expecting no namespace for element %s\n",
                     arg1);
            break;
        case XML_RELAXNG_ERR_ELEMNOTEMPTY:
            snprintf(msg, 1000, "Expecting element %s to be empty\n", arg1);
            break;
        case XML_RELAXNG_ERR_NOELEM:
            snprintf(msg, 1000, "Expecting an element %s, got nothing\n",
                     arg1);
            break;
        case XML_RELAXNG_ERR_NOTELEM:
            return (xmlCharStrdup("Expecting an element got text\n"));
        case XML_RELAXNG_ERR_ATTRVALID:
            snprintf(msg, 1000, "Element %s failed to validate attributes\n",
                     arg1);
            break;
        case XML_RELAXNG_ERR_CONTENTVALID:
            snprintf(msg, 1000, "Element %s failed to validate content\n",
                     arg1);
            break;
        case XML_RELAXNG_ERR_EXTRACONTENT:
            snprintf(msg, 1000, "Element %s has extra content: %s\n",
                     arg1, arg2);
            break;
        case XML_RELAXNG_ERR_INVALIDATTR:
            snprintf(msg, 1000, "Invalid attribute %s for element %s\n",
                     arg1, arg2);
            break;
        case XML_RELAXNG_ERR_LACKDATA:
            snprintf(msg, 1000, "Datatype element %s contains no data\n",
                     arg1);
            break;
        case XML_RELAXNG_ERR_DATAELEM:
            snprintf(msg, 1000, "Datatype element %s has child elements\n",
                     arg1);
            break;
        case XML_RELAXNG_ERR_VALELEM:
            snprintf(msg, 1000, "Value element %s has child elements\n",
                     arg1);
            break;
        case XML_RELAXNG_ERR_LISTELEM:
            snprintf(msg, 1000, "List element %s has child elements\n",
                     arg1);
            break;
        case XML_RELAXNG_ERR_DATATYPE:
            snprintf(msg, 1000, "Error validating datatype %s\n", arg1);
            break;
        case XML_RELAXNG_ERR_VALUE:
            snprintf(msg, 1000, "Error validating value %s\n", arg1);
            break;
        case XML_RELAXNG_ERR_LIST:
            return (xmlCharStrdup("Error validating list\n"));
        case XML_RELAXNG_ERR_NOGRAMMAR:
            return (xmlCharStrdup("No top grammar defined\n"));
        case XML_RELAXNG_ERR_EXTRADATA:
            return (xmlCharStrdup("Extra data in the document\n"));
        default:
            return (xmlCharStrdup("Unknown error !\n"));
    }
    if (msg[0] == 0) {
        snprintf(msg, 1000, "Unknown error code %d\n", err);
    }
    msg[1000 - 1] = 0;
    return (xmlStrdup((xmlChar *) msg));
}

/**
 * xmlRelaxNGShowValidError:
 * @ctxt:  the validation context
 * @err:  the error number
 * @node:  the node
 * @child:  the node child generating the problem.
 * @arg1:  the first argument
 * @arg2:  the second argument
 *
 * Show a validation error.
 */
static void
xmlRelaxNGShowValidError(xmlRelaxNGValidCtxtPtr ctxt,
                         xmlRelaxNGValidErr err, xmlNodePtr node,
                         xmlNodePtr child, const xmlChar * arg1,
                         const xmlChar * arg2)
{
    xmlChar *msg;

    if (ctxt->flags & FLAGS_NOERROR)
        return;

#ifdef DEBUG_ERROR
    xmlGenericError(xmlGenericErrorContext, "Show error %d\n", err);
#endif
    msg = xmlRelaxNGGetErrorString(err, arg1, arg2);
    if (msg == NULL)
        return;

    if (ctxt->errNo == XML_RELAXNG_OK)
        ctxt->errNo = err;
    xmlRngVErr(ctxt, (child == NULL ? node : child), err,
               (const char *) msg, arg1, arg2);
    xmlFree(msg);
}

/**
 * xmlRelaxNGPopErrors:
 * @ctxt:  the validation context
 * @level:  the error level in the stack
 *
 * pop and discard all errors until the given level is reached
 */
static void
xmlRelaxNGPopErrors(xmlRelaxNGValidCtxtPtr ctxt, int level)
{
    int i;
    xmlRelaxNGValidErrorPtr err;

#ifdef DEBUG_ERROR
    xmlGenericError(xmlGenericErrorContext,
                    "Pop errors till level %d\n", level);
#endif
    for (i = level; i < ctxt->errNr; i++) {
        err = &ctxt->errTab[i];
        if (err->flags & ERROR_IS_DUP) {
            if (err->arg1 != NULL)
                xmlFree((xmlChar *) err->arg1);
            err->arg1 = NULL;
            if (err->arg2 != NULL)
                xmlFree((xmlChar *) err->arg2);
            err->arg2 = NULL;
            err->flags = 0;
        }
    }
    ctxt->errNr = level;
    if (ctxt->errNr <= 0)
        ctxt->err = NULL;
}

/**
 * xmlRelaxNGDumpValidError:
 * @ctxt:  the validation context
 *
 * Show all validation error over a given index.
 */
static void
xmlRelaxNGDumpValidError(xmlRelaxNGValidCtxtPtr ctxt)
{
    int i, j, k;
    xmlRelaxNGValidErrorPtr err, dup;

#ifdef DEBUG_ERROR
    xmlGenericError(xmlGenericErrorContext,
                    "Dumping error stack %d errors\n", ctxt->errNr);
#endif
    for (i = 0, k = 0; i < ctxt->errNr; i++) {
        err = &ctxt->errTab[i];
        if (k < MAX_ERROR) {
            for (j = 0; j < i; j++) {
                dup = &ctxt->errTab[j];
                if ((err->err == dup->err) && (err->node == dup->node) &&
                    (xmlStrEqual(err->arg1, dup->arg1)) &&
                    (xmlStrEqual(err->arg2, dup->arg2))) {
                    goto skip;
                }
            }
            xmlRelaxNGShowValidError(ctxt, err->err, err->node, err->seq,
                                     err->arg1, err->arg2);
            k++;
        }
      skip:
        if (err->flags & ERROR_IS_DUP) {
            if (err->arg1 != NULL)
                xmlFree((xmlChar *) err->arg1);
            err->arg1 = NULL;
            if (err->arg2 != NULL)
                xmlFree((xmlChar *) err->arg2);
            err->arg2 = NULL;
            err->flags = 0;
        }
    }
    ctxt->errNr = 0;
}

/**
 * xmlRelaxNGAddValidError:
 * @ctxt:  the validation context
 * @err:  the error number
 * @arg1:  the first argument
 * @arg2:  the second argument
 * @dup:  need to dup the args
 *
 * Register a validation error, either generating it if it's sure
 * or stacking it for later handling if unsure.
 */
static void
xmlRelaxNGAddValidError(xmlRelaxNGValidCtxtPtr ctxt,
                        xmlRelaxNGValidErr err, const xmlChar * arg1,
                        const xmlChar * arg2, int dup)
{
    if (ctxt == NULL)
        return;
    if (ctxt->flags & FLAGS_NOERROR)
        return;

#ifdef DEBUG_ERROR
    xmlGenericError(xmlGenericErrorContext, "Adding error %d\n", err);
#endif
    /*
     * generate the error directly
     */
    if (((ctxt->flags & FLAGS_IGNORABLE) == 0) ||
    	 (ctxt->flags & FLAGS_NEGATIVE)) {
        xmlNodePtr node, seq;

        /*
         * Flush first any stacked error which might be the
         * real cause of the problem.
         */
        if (ctxt->errNr != 0)
            xmlRelaxNGDumpValidError(ctxt);
        if (ctxt->state != NULL) {
            node = ctxt->state->node;
            seq = ctxt->state->seq;
        } else {
            node = seq = NULL;
        }
        xmlRelaxNGShowValidError(ctxt, err, node, seq, arg1, arg2);
    }
    /*
     * Stack the error for later processing if needed
     */
    else {
        xmlRelaxNGValidErrorPush(ctxt, err, arg1, arg2, dup);
    }
}


/************************************************************************
 * 									*
 * 			Type library hooks				*
 * 									*
 ************************************************************************/
static xmlChar *xmlRelaxNGNormalize(xmlRelaxNGValidCtxtPtr ctxt,
                                    const xmlChar * str);

/**
 * xmlRelaxNGSchemaTypeHave:
 * @data:  data needed for the library
 * @type:  the type name
 *
 * Check if the given type is provided by
 * the W3C XMLSchema Datatype library.
 *
 * Returns 1 if yes, 0 if no and -1 in case of error.
 */
static int
xmlRelaxNGSchemaTypeHave(void *data ATTRIBUTE_UNUSED, const xmlChar * type)
{
    xmlSchemaTypePtr typ;

    if (type == NULL)
        return (-1);
    typ = xmlSchemaGetPredefinedType(type,
                                     BAD_CAST
                                     "http://www.w3.org/2001/XMLSchema");
    if (typ == NULL)
        return (0);
    return (1);
}

/**
 * xmlRelaxNGSchemaTypeCheck:
 * @data:  data needed for the library
 * @type:  the type name
 * @value:  the value to check
 * @node:  the node
 *
 * Check if the given type and value are validated by
 * the W3C XMLSchema Datatype library.
 *
 * Returns 1 if yes, 0 if no and -1 in case of error.
 */
static int
xmlRelaxNGSchemaTypeCheck(void *data ATTRIBUTE_UNUSED,
                          const xmlChar * type,
                          const xmlChar * value,
                          void **result, xmlNodePtr node)
{
    xmlSchemaTypePtr typ;
    int ret;

    if ((type == NULL) || (value == NULL))
        return (-1);
    typ = xmlSchemaGetPredefinedType(type,
                                     BAD_CAST
                                     "http://www.w3.org/2001/XMLSchema");
    if (typ == NULL)
        return (-1);
    ret = xmlSchemaValPredefTypeNode(typ, value,
                                     (xmlSchemaValPtr *) result, node);
    if (ret == 2)               /* special ID error code */
        return (2);
    if (ret == 0)
        return (1);
    if (ret > 0)
        return (0);
    return (-1);
}

/**
 * xmlRelaxNGSchemaFacetCheck:
 * @data:  data needed for the library
 * @type:  the type name
 * @facet:  the facet name
 * @val:  the facet value
 * @strval:  the string value
 * @value:  the value to check
 *
 * Function provided by a type library to check a value facet
 *
 * Returns 1 if yes, 0 if no and -1 in case of error.
 */
static int
xmlRelaxNGSchemaFacetCheck(void *data ATTRIBUTE_UNUSED,
                           const xmlChar * type, const xmlChar * facetname,
                           const xmlChar * val, const xmlChar * strval,
                           void *value)
{
    xmlSchemaFacetPtr facet;
    xmlSchemaTypePtr typ;
    int ret;

    if ((type == NULL) || (strval == NULL))
        return (-1);
    typ = xmlSchemaGetPredefinedType(type,
                                     BAD_CAST
                                     "http://www.w3.org/2001/XMLSchema");
    if (typ == NULL)
        return (-1);

    facet = xmlSchemaNewFacet();
    if (facet == NULL)
        return (-1);

    if (xmlStrEqual(facetname, BAD_CAST "minInclusive")) {
        facet->type = XML_SCHEMA_FACET_MININCLUSIVE;
    } else if (xmlStrEqual(facetname, BAD_CAST "minExclusive")) {
        facet->type = XML_SCHEMA_FACET_MINEXCLUSIVE;
    } else if (xmlStrEqual(facetname, BAD_CAST "maxInclusive")) {
        facet->type = XML_SCHEMA_FACET_MAXINCLUSIVE;
    } else if (xmlStrEqual(facetname, BAD_CAST "maxExclusive")) {
        facet->type = XML_SCHEMA_FACET_MAXEXCLUSIVE;
    } else if (xmlStrEqual(facetname, BAD_CAST "totalDigits")) {
        facet->type = XML_SCHEMA_FACET_TOTALDIGITS;
    } else if (xmlStrEqual(facetname, BAD_CAST "fractionDigits")) {
        facet->type = XML_SCHEMA_FACET_FRACTIONDIGITS;
    } else if (xmlStrEqual(facetname, BAD_CAST "pattern")) {
        facet->type = XML_SCHEMA_FACET_PATTERN;
    } else if (xmlStrEqual(facetname, BAD_CAST "enumeration")) {
        facet->type = XML_SCHEMA_FACET_ENUMERATION;
    } else if (xmlStrEqual(facetname, BAD_CAST "whiteSpace")) {
        facet->type = XML_SCHEMA_FACET_WHITESPACE;
    } else if (xmlStrEqual(facetname, BAD_CAST "length")) {
        facet->type = XML_SCHEMA_FACET_LENGTH;
    } else if (xmlStrEqual(facetname, BAD_CAST "maxLength")) {
        facet->type = XML_SCHEMA_FACET_MAXLENGTH;
    } else if (xmlStrEqual(facetname, BAD_CAST "minLength")) {
        facet->type = XML_SCHEMA_FACET_MINLENGTH;
    } else {
        xmlSchemaFreeFacet(facet);
        return (-1);
    }
    facet->value = val;
    ret = xmlSchemaCheckFacet(facet, typ, NULL, type);
    if (ret != 0) {
        xmlSchemaFreeFacet(facet);
        return (-1);
    }
    ret = xmlSchemaValidateFacet(typ, facet, strval, value);
    xmlSchemaFreeFacet(facet);
    if (ret != 0)
        return (-1);
    return (0);
}

/**
 * xmlRelaxNGSchemaFreeValue:
 * @data:  data needed for the library
 * @value:  the value to free
 *
 * Function provided by a type library to free a Schemas value
 *
 * Returns 1 if yes, 0 if no and -1 in case of error.
 */
static void
xmlRelaxNGSchemaFreeValue(void *data ATTRIBUTE_UNUSED, void *value)
{
    xmlSchemaFreeValue(value);
}

/**
 * xmlRelaxNGSchemaTypeCompare:
 * @data:  data needed for the library
 * @type:  the type name
 * @value1:  the first value
 * @value2:  the second value
 *
 * Compare two values for equality accordingly a type from the W3C XMLSchema
 * Datatype library.
 *
 * Returns 1 if equal, 0 if no and -1 in case of error.
 */
static int
xmlRelaxNGSchemaTypeCompare(void *data ATTRIBUTE_UNUSED,
                            const xmlChar * type,
                            const xmlChar * value1,
                            xmlNodePtr ctxt1,
                            void *comp1,
                            const xmlChar * value2, xmlNodePtr ctxt2)
{
    int ret;
    xmlSchemaTypePtr typ;
    xmlSchemaValPtr res1 = NULL, res2 = NULL;

    if ((type == NULL) || (value1 == NULL) || (value2 == NULL))
        return (-1);
    typ = xmlSchemaGetPredefinedType(type,
                                     BAD_CAST
                                     "http://www.w3.org/2001/XMLSchema");
    if (typ == NULL)
        return (-1);
    if (comp1 == NULL) {
        ret = xmlSchemaValPredefTypeNode(typ, value1, &res1, ctxt1);
        if (ret != 0)
            return (-1);
        if (res1 == NULL)
            return (-1);
    } else {
        res1 = (xmlSchemaValPtr) comp1;
    }
    ret = xmlSchemaValPredefTypeNode(typ, value2, &res2, ctxt2);
    if (ret != 0) {
	if ((comp1 == NULL) && (res1 != NULL))
	    xmlSchemaFreeValue(res1);
        return (-1);
    }
    if (res1 == NULL) {
        return (-1);
    }
    ret = xmlSchemaCompareValues(res1, res2);
    if (res1 != (xmlSchemaValPtr) comp1)
        xmlSchemaFreeValue(res1);
    xmlSchemaFreeValue(res2);
    if (ret == -2)
        return (-1);
    if (ret == 0)
        return (1);
    return (0);
}

/**
 * xmlRelaxNGDefaultTypeHave:
 * @data:  data needed for the library
 * @type:  the type name
 *
 * Check if the given type is provided by
 * the default datatype library.
 *
 * Returns 1 if yes, 0 if no and -1 in case of error.
 */
static int
xmlRelaxNGDefaultTypeHave(void *data ATTRIBUTE_UNUSED,
                          const xmlChar * type)
{
    if (type == NULL)
        return (-1);
    if (xmlStrEqual(type, BAD_CAST "string"))
        return (1);
    if (xmlStrEqual(type, BAD_CAST "token"))
        return (1);
    return (0);
}

/**
 * xmlRelaxNGDefaultTypeCheck:
 * @data:  data needed for the library
 * @type:  the type name
 * @value:  the value to check
 * @node:  the node
 *
 * Check if the given type and value are validated by
 * the default datatype library.
 *
 * Returns 1 if yes, 0 if no and -1 in case of error.
 */
static int
xmlRelaxNGDefaultTypeCheck(void *data ATTRIBUTE_UNUSED,
                           const xmlChar * type ATTRIBUTE_UNUSED,
                           const xmlChar * value ATTRIBUTE_UNUSED,
                           void **result ATTRIBUTE_UNUSED,
                           xmlNodePtr node ATTRIBUTE_UNUSED)
{
    if (value == NULL)
        return (-1);
    if (xmlStrEqual(type, BAD_CAST "string"))
        return (1);
    if (xmlStrEqual(type, BAD_CAST "token")) {
        return (1);
    }

    return (0);
}

/**
 * xmlRelaxNGDefaultTypeCompare:
 * @data:  data needed for the library
 * @type:  the type name
 * @value1:  the first value
 * @value2:  the second value
 *
 * Compare two values accordingly a type from the default
 * datatype library.
 *
 * Returns 1 if yes, 0 if no and -1 in case of error.
 */
static int
xmlRelaxNGDefaultTypeCompare(void *data ATTRIBUTE_UNUSED,
                             const xmlChar * type,
                             const xmlChar * value1,
                             xmlNodePtr ctxt1 ATTRIBUTE_UNUSED,
                             void *comp1 ATTRIBUTE_UNUSED,
                             const xmlChar * value2,
                             xmlNodePtr ctxt2 ATTRIBUTE_UNUSED)
{
    int ret = -1;

    if (xmlStrEqual(type, BAD_CAST "string")) {
        ret = xmlStrEqual(value1, value2);
    } else if (xmlStrEqual(type, BAD_CAST "token")) {
        if (!xmlStrEqual(value1, value2)) {
            xmlChar *nval, *nvalue;

            /*
             * TODO: trivial optimizations are possible by
             * computing at compile-time
             */
            nval = xmlRelaxNGNormalize(NULL, value1);
            nvalue = xmlRelaxNGNormalize(NULL, value2);

            if ((nval == NULL) || (nvalue == NULL))
                ret = -1;
            else if (xmlStrEqual(nval, nvalue))
                ret = 1;
            else
                ret = 0;
            if (nval != NULL)
                xmlFree(nval);
            if (nvalue != NULL)
                xmlFree(nvalue);
        } else
            ret = 1;
    }
    return (ret);
}

static int xmlRelaxNGTypeInitialized = 0;
static xmlHashTablePtr xmlRelaxNGRegisteredTypes = NULL;

/**
 * xmlRelaxNGFreeTypeLibrary:
 * @lib:  the type library structure
 * @namespace:  the URI bound to the library
 *
 * Free the structure associated to the type library
 */
static void
xmlRelaxNGFreeTypeLibrary(xmlRelaxNGTypeLibraryPtr lib,
                          const xmlChar * namespace ATTRIBUTE_UNUSED)
{
    if (lib == NULL)
        return;
    if (lib->namespace != NULL)
        xmlFree((xmlChar *) lib->namespace);
    xmlFree(lib);
}

/**
 * xmlRelaxNGRegisterTypeLibrary:
 * @namespace:  the URI bound to the library
 * @data:  data associated to the library
 * @have:  the provide function
 * @check:  the checking function
 * @comp:  the comparison function
 *
 * Register a new type library
 *
 * Returns 0 in case of success and -1 in case of error.
 */
static int
xmlRelaxNGRegisterTypeLibrary(const xmlChar * namespace, void *data,
                              xmlRelaxNGTypeHave have,
                              xmlRelaxNGTypeCheck check,
                              xmlRelaxNGTypeCompare comp,
                              xmlRelaxNGFacetCheck facet,
                              xmlRelaxNGTypeFree freef)
{
    xmlRelaxNGTypeLibraryPtr lib;
    int ret;

    if ((xmlRelaxNGRegisteredTypes == NULL) || (namespace == NULL) ||
        (check == NULL) || (comp == NULL))
        return (-1);
    if (xmlHashLookup(xmlRelaxNGRegisteredTypes, namespace) != NULL) {
        xmlGenericError(xmlGenericErrorContext,
                        "Relax-NG types library '%s' already registered\n",
                        namespace);
        return (-1);
    }
    lib =
        (xmlRelaxNGTypeLibraryPtr)
        xmlMalloc(sizeof(xmlRelaxNGTypeLibrary));
    if (lib == NULL) {
        xmlRngVErrMemory(NULL, "adding types library\n");
        return (-1);
    }
    memset(lib, 0, sizeof(xmlRelaxNGTypeLibrary));
    lib->namespace = xmlStrdup(namespace);
    lib->data = data;
    lib->have = have;
    lib->comp = comp;
    lib->check = check;
    lib->facet = facet;
    lib->freef = freef;
    ret = xmlHashAddEntry(xmlRelaxNGRegisteredTypes, namespace, lib);
    if (ret < 0) {
        xmlGenericError(xmlGenericErrorContext,
                        "Relax-NG types library failed to register '%s'\n",
                        namespace);
        xmlRelaxNGFreeTypeLibrary(lib, namespace);
        return (-1);
    }
    return (0);
}

/**
 * xmlRelaxNGInitTypes:
 *
 * Initilize the default type libraries.
 *
 * Returns 0 in case of success and -1 in case of error.
 */
int
xmlRelaxNGInitTypes(void)
{
    if (xmlRelaxNGTypeInitialized != 0)
        return (0);
    xmlRelaxNGRegisteredTypes = xmlHashCreate(10);
    if (xmlRelaxNGRegisteredTypes == NULL) {
        xmlGenericError(xmlGenericErrorContext,
                        "Failed to allocate sh table for Relax-NG types\n");
        return (-1);
    }
    xmlRelaxNGRegisterTypeLibrary(BAD_CAST
                                  "http://www.w3.org/2001/XMLSchema-datatypes",
                                  NULL, xmlRelaxNGSchemaTypeHave,
                                  xmlRelaxNGSchemaTypeCheck,
                                  xmlRelaxNGSchemaTypeCompare,
                                  xmlRelaxNGSchemaFacetCheck,
                                  xmlRelaxNGSchemaFreeValue);
    xmlRelaxNGRegisterTypeLibrary(xmlRelaxNGNs, NULL,
                                  xmlRelaxNGDefaultTypeHave,
                                  xmlRelaxNGDefaultTypeCheck,
                                  xmlRelaxNGDefaultTypeCompare, NULL,
                                  NULL);
    xmlRelaxNGTypeInitialized = 1;
    return (0);
}

/**
 * xmlRelaxNGCleanupTypes:
 *
 * Cleanup the default Schemas type library associated to RelaxNG
 */
void
xmlRelaxNGCleanupTypes(void)
{
    xmlSchemaCleanupTypes();
    if (xmlRelaxNGTypeInitialized == 0)
        return;
    xmlHashFree(xmlRelaxNGRegisteredTypes, (xmlHashDeallocator)
                xmlRelaxNGFreeTypeLibrary);
    xmlRelaxNGTypeInitialized = 0;
}

/************************************************************************
 * 									*
 * 		Compiling element content into regexp			*
 * 									*
 * Sometime the element content can be compiled into a pure regexp,	*
 * This allows a faster execution and streamability at that level	*
 * 									*
 ************************************************************************/

static int xmlRelaxNGTryCompile(xmlRelaxNGParserCtxtPtr ctxt,
                                xmlRelaxNGDefinePtr def);

/**
 * xmlRelaxNGIsCompileable:
 * @define:  the definition to check
 *
 * Check if a definition is nullable.
 *
 * Returns 1 if yes, 0 if no and -1 in case of error
 */
static int
xmlRelaxNGIsCompileable(xmlRelaxNGDefinePtr def)
{
    int ret = -1;

    if (def == NULL) {
        return (-1);
    }
    if ((def->type != XML_RELAXNG_ELEMENT) &&
        (def->dflags & IS_COMPILABLE))
        return (1);
    if ((def->type != XML_RELAXNG_ELEMENT) &&
        (def->dflags & IS_NOT_COMPILABLE))
        return (0);
    switch (def->type) {
        case XML_RELAXNG_NOOP:
            ret = xmlRelaxNGIsCompileable(def->content);
            break;
        case XML_RELAXNG_TEXT:
        case XML_RELAXNG_EMPTY:
            ret = 1;
            break;
        case XML_RELAXNG_ELEMENT:
            /*
             * Check if the element content is compileable
             */
            if (((def->dflags & IS_NOT_COMPILABLE) == 0) &&
                ((def->dflags & IS_COMPILABLE) == 0)) {
                xmlRelaxNGDefinePtr list;

                list = def->content;
                while (list != NULL) {
                    ret = xmlRelaxNGIsCompileable(list);
                    if (ret != 1)
                        break;
                    list = list->next;
                }
		/*
		 * Because the routine is recursive, we must guard against
		 * discovering both COMPILABLE and NOT_COMPILABLE
		 */
                if (ret == 0) {
		    def->dflags &= ~IS_COMPILABLE;
                    def->dflags |= IS_NOT_COMPILABLE;
		}
                if ((ret == 1) && !(def->dflags &= IS_NOT_COMPILABLE))
                    def->dflags |= IS_COMPILABLE;
#ifdef DEBUG_COMPILE
                if (ret == 1) {
                    xmlGenericError(xmlGenericErrorContext,
                                    "element content for %s is compilable\n",
                                    def->name);
                } else if (ret == 0) {
                    xmlGenericError(xmlGenericErrorContext,
                                    "element content for %s is not compilable\n",
                                    def->name);
                } else {
                    xmlGenericError(xmlGenericErrorContext,
                                    "Problem in RelaxNGIsCompileable for element %s\n",
                                    def->name);
                }
#endif
            }
            /*
             * All elements return a compileable status unless they
             * are generic like anyName
             */
            if ((def->nameClass != NULL) || (def->name == NULL))
                ret = 0;
            else
                ret = 1;
            return (ret);
        case XML_RELAXNG_REF:
        case XML_RELAXNG_EXTERNALREF:
        case XML_RELAXNG_PARENTREF:
            if (def->depth == -20) {
                return (1);
            } else {
                xmlRelaxNGDefinePtr list;

                def->depth = -20;
                list = def->content;
                while (list != NULL) {
                    ret = xmlRelaxNGIsCompileable(list);
                    if (ret != 1)
                        break;
                    list = list->next;
                }
            }
            break;
        case XML_RELAXNG_START:
        case XML_RELAXNG_OPTIONAL:
        case XML_RELAXNG_ZEROORMORE:
        case XML_RELAXNG_ONEORMORE:
        case XML_RELAXNG_CHOICE:
        case XML_RELAXNG_GROUP:
        case XML_RELAXNG_DEF:{
                xmlRelaxNGDefinePtr list;

                list = def->content;
                while (list != NULL) {
                    ret = xmlRelaxNGIsCompileable(list);
                    if (ret != 1)
                        break;
                    list = list->next;
                }
                break;
            }
        case XML_RELAXNG_EXCEPT:
        case XML_RELAXNG_ATTRIBUTE:
        case XML_RELAXNG_INTERLEAVE:
        case XML_RELAXNG_DATATYPE:
        case XML_RELAXNG_LIST:
        case XML_RELAXNG_PARAM:
        case XML_RELAXNG_VALUE:
        case XML_RELAXNG_NOT_ALLOWED:
            ret = 0;
            break;
    }
    if (ret == 0)
        def->dflags |= IS_NOT_COMPILABLE;
    if (ret == 1)
        def->dflags |= IS_COMPILABLE;
#ifdef DEBUG_COMPILE
    if (ret == 1) {
        xmlGenericError(xmlGenericErrorContext,
                        "RelaxNGIsCompileable %s : true\n",
                        xmlRelaxNGDefName(def));
    } else if (ret == 0) {
        xmlGenericError(xmlGenericErrorContext,
                        "RelaxNGIsCompileable %s : false\n",
                        xmlRelaxNGDefName(def));
    } else {
        xmlGenericError(xmlGenericErrorContext,
                        "Problem in RelaxNGIsCompileable %s\n",
                        xmlRelaxNGDefName(def));
    }
#endif
    return (ret);
}

/**
 * xmlRelaxNGCompile:
 * ctxt:  the RelaxNG parser context
 * @define:  the definition tree to compile
 *
 * Compile the set of definitions, it works recursively, till the
 * element boundaries, where it tries to compile the content if possible
 *
 * Returns 0 if success and -1 in case of error
 */
static int
xmlRelaxNGCompile(xmlRelaxNGParserCtxtPtr ctxt, xmlRelaxNGDefinePtr def)
{
    int ret = 0;
    xmlRelaxNGDefinePtr list;

    if ((ctxt == NULL) || (def == NULL))
        return (-1);

    switch (def->type) {
        case XML_RELAXNG_START:
            if ((xmlRelaxNGIsCompileable(def) == 1) && (def->depth != -25)) {
                xmlAutomataPtr oldam = ctxt->am;
                xmlAutomataStatePtr oldstate = ctxt->state;

                def->depth = -25;

                list = def->content;
                ctxt->am = xmlNewAutomata();
                if (ctxt->am == NULL)
                    return (-1);
                ctxt->state = xmlAutomataGetInitState(ctxt->am);
                while (list != NULL) {
                    xmlRelaxNGCompile(ctxt, list);
                    list = list->next;
                }
                xmlAutomataSetFinalState(ctxt->am, ctxt->state);
                def->contModel = xmlAutomataCompile(ctxt->am);
                xmlRegexpIsDeterminist(def->contModel);

                xmlFreeAutomata(ctxt->am);
                ctxt->state = oldstate;
                ctxt->am = oldam;
            }
            break;
        case XML_RELAXNG_ELEMENT:
            if ((ctxt->am != NULL) && (def->name != NULL)) {
                ctxt->state = xmlAutomataNewTransition2(ctxt->am,
                                                        ctxt->state, NULL,
                                                        def->name, def->ns,
                                                        def);
            }
            if ((def->dflags & IS_COMPILABLE) && (def->depth != -25)) {
                xmlAutomataPtr oldam = ctxt->am;
                xmlAutomataStatePtr oldstate = ctxt->state;

                def->depth = -25;

                list = def->content;
                ctxt->am = xmlNewAutomata();
                if (ctxt->am == NULL)
                    return (-1);
                ctxt->state = xmlAutomataGetInitState(ctxt->am);
                while (list != NULL) {
                    xmlRelaxNGCompile(ctxt, list);
                    list = list->next;
                }
                xmlAutomataSetFinalState(ctxt->am, ctxt->state);
                def->contModel = xmlAutomataCompile(ctxt->am);
                if (!xmlRegexpIsDeterminist(def->contModel)) {
                    /*
                     * we can only use the automata if it is determinist
                     */
                    xmlRegFreeRegexp(def->contModel);
                    def->contModel = NULL;
                }
                xmlFreeAutomata(ctxt->am);
                ctxt->state = oldstate;
                ctxt->am = oldam;
            } else {
                xmlAutomataPtr oldam = ctxt->am;

                /*
                 * we can't build the content model for this element content
                 * but it still might be possible to build it for some of its
                 * children, recurse.
                 */
                ret = xmlRelaxNGTryCompile(ctxt, def);
                ctxt->am = oldam;
            }
            break;
        case XML_RELAXNG_NOOP:
            ret = xmlRelaxNGCompile(ctxt, def->content);
            break;
        case XML_RELAXNG_OPTIONAL:{
                xmlAutomataStatePtr oldstate = ctxt->state;

                xmlRelaxNGCompile(ctxt, def->content);
                xmlAutomataNewEpsilon(ctxt->am, oldstate, ctxt->state);
                break;
            }
        case XML_RELAXNG_ZEROORMORE:{
                xmlAutomataStatePtr oldstate;

                ctxt->state =
                    xmlAutomataNewEpsilon(ctxt->am, ctxt->state, NULL);
                oldstate = ctxt->state;
                list = def->content;
                while (list != NULL) {
                    xmlRelaxNGCompile(ctxt, list);
                    list = list->next;
                }
                xmlAutomataNewEpsilon(ctxt->am, ctxt->state, oldstate);
                ctxt->state =
                    xmlAutomataNewEpsilon(ctxt->am, oldstate, NULL);
                break;
            }
        case XML_RELAXNG_ONEORMORE:{
                xmlAutomataStatePtr oldstate;

                list = def->content;
                while (list != NULL) {
                    xmlRelaxNGCompile(ctxt, list);
                    list = list->next;
                }
                oldstate = ctxt->state;
                list = def->content;
                while (list != NULL) {
                    xmlRelaxNGCompile(ctxt, list);
                    list = list->next;
                }
                xmlAutomataNewEpsilon(ctxt->am, ctxt->state, oldstate);
                ctxt->state =
                    xmlAutomataNewEpsilon(ctxt->am, oldstate, NULL);
                break;
            }
        case XML_RELAXNG_CHOICE:{
                xmlAutomataStatePtr target = NULL;
                xmlAutomataStatePtr oldstate = ctxt->state;

                list = def->content;
                while (list != NULL) {
                    ctxt->state = oldstate;
                    ret = xmlRelaxNGCompile(ctxt, list);
                    if (ret != 0)
                        break;
                    if (target == NULL)
                        target = ctxt->state;
                    else {
                        xmlAutomataNewEpsilon(ctxt->am, ctxt->state,
                                              target);
                    }
                    list = list->next;
                }
                ctxt->state = target;

                break;
            }
        case XML_RELAXNG_REF:
        case XML_RELAXNG_EXTERNALREF:
        case XML_RELAXNG_PARENTREF:
        case XML_RELAXNG_GROUP:
        case XML_RELAXNG_DEF:
            list = def->content;
            while (list != NULL) {
                ret = xmlRelaxNGCompile(ctxt, list);
                if (ret != 0)
                    break;
                list = list->next;
            }
            break;
        case XML_RELAXNG_TEXT:{
                xmlAutomataStatePtr oldstate;

                ctxt->state =
                    xmlAutomataNewEpsilon(ctxt->am, ctxt->state, NULL);
                oldstate = ctxt->state;
                xmlRelaxNGCompile(ctxt, def->content);
                xmlAutomataNewTransition(ctxt->am, ctxt->state,
                                         ctxt->state, BAD_CAST "#text",
                                         NULL);
                ctxt->state =
                    xmlAutomataNewEpsilon(ctxt->am, oldstate, NULL);
                break;
            }
        case XML_RELAXNG_EMPTY:
            ctxt->state =
                xmlAutomataNewEpsilon(ctxt->am, ctxt->state, NULL);
            break;
        case XML_RELAXNG_EXCEPT:
        case XML_RELAXNG_ATTRIBUTE:
        case XML_RELAXNG_INTERLEAVE:
        case XML_RELAXNG_NOT_ALLOWED:
        case XML_RELAXNG_DATATYPE:
        case XML_RELAXNG_LIST:
        case XML_RELAXNG_PARAM:
        case XML_RELAXNG_VALUE:
            /* This should not happen and generate an internal error */
            fprintf(stderr, "RNG internal error trying to compile %s\n",
                    xmlRelaxNGDefName(def));
            break;
    }
    return (ret);
}

/**
 * xmlRelaxNGTryCompile:
 * ctxt:  the RelaxNG parser context
 * @define:  the definition tree to compile
 *
 * Try to compile the set of definitions, it works recursively,
 * possibly ignoring parts which cannot be compiled.
 *
 * Returns 0 if success and -1 in case of error
 */
static int
xmlRelaxNGTryCompile(xmlRelaxNGParserCtxtPtr ctxt, xmlRelaxNGDefinePtr def)
{
    int ret = 0;
    xmlRelaxNGDefinePtr list;

    if ((ctxt == NULL) || (def == NULL))
        return (-1);

    if ((def->type == XML_RELAXNG_START) ||
        (def->type == XML_RELAXNG_ELEMENT)) {
        ret = xmlRelaxNGIsCompileable(def);
        if ((def->dflags & IS_COMPILABLE) && (def->depth != -25)) {
            ctxt->am = NULL;
            ret = xmlRelaxNGCompile(ctxt, def);
#ifdef DEBUG_PROGRESSIVE
            if (ret == 0) {
                if (def->type == XML_RELAXNG_START)
                    xmlGenericError(xmlGenericErrorContext,
                                    "compiled the start\n");
                else
                    xmlGenericError(xmlGenericErrorContext,
                                    "compiled element %s\n", def->name);
            } else {
                if (def->type == XML_RELAXNG_START)
                    xmlGenericError(xmlGenericErrorContext,
                                    "failed to compile the start\n");
                else
                    xmlGenericError(xmlGenericErrorContext,
                                    "failed to compile element %s\n",
                                    def->name);
            }
#endif
            return (ret);
        }
    }
    switch (def->type) {
        case XML_RELAXNG_NOOP:
            ret = xmlRelaxNGTryCompile(ctxt, def->content);
            break;
        case XML_RELAXNG_TEXT:
        case XML_RELAXNG_DATATYPE:
        case XML_RELAXNG_LIST:
        case XML_RELAXNG_PARAM:
        case XML_RELAXNG_VALUE:
        case XML_RELAXNG_EMPTY:
        case XML_RELAXNG_ELEMENT:
            ret = 0;
            break;
        case XML_RELAXNG_OPTIONAL:
        case XML_RELAXNG_ZEROORMORE:
        case XML_RELAXNG_ONEORMORE:
        case XML_RELAXNG_CHOICE:
        case XML_RELAXNG_GROUP:
        case XML_RELAXNG_DEF:
        case XML_RELAXNG_START:
        case XML_RELAXNG_REF:
        case XML_RELAXNG_EXTERNALREF:
        case XML_RELAXNG_PARENTREF:
            list = def->content;
            while (list != NULL) {
                ret = xmlRelaxNGTryCompile(ctxt, list);
                if (ret != 0)
                    break;
                list = list->next;
            }
            break;
        case XML_RELAXNG_EXCEPT:
        case XML_RELAXNG_ATTRIBUTE:
        case XML_RELAXNG_INTERLEAVE:
        case XML_RELAXNG_NOT_ALLOWED:
            ret = 0;
            break;
    }
    return (ret);
}

/************************************************************************
 * 									*
 * 			Parsing functions				*
 * 									*
 ************************************************************************/

static xmlRelaxNGDefinePtr xmlRelaxNGParseAttribute(xmlRelaxNGParserCtxtPtr
                                                    ctxt, xmlNodePtr node);
static xmlRelaxNGDefinePtr xmlRelaxNGParseElement(xmlRelaxNGParserCtxtPtr
                                                  ctxt, xmlNodePtr node);
static xmlRelaxNGDefinePtr xmlRelaxNGParsePatterns(xmlRelaxNGParserCtxtPtr
                                                   ctxt, xmlNodePtr nodes,
                                                   int group);
static xmlRelaxNGDefinePtr xmlRelaxNGParsePattern(xmlRelaxNGParserCtxtPtr
                                                  ctxt, xmlNodePtr node);
static xmlRelaxNGPtr xmlRelaxNGParseDocument(xmlRelaxNGParserCtxtPtr ctxt,
                                             xmlNodePtr node);
static int xmlRelaxNGParseGrammarContent(xmlRelaxNGParserCtxtPtr ctxt,
                                         xmlNodePtr nodes);
static xmlRelaxNGDefinePtr xmlRelaxNGParseNameClass(xmlRelaxNGParserCtxtPtr
                                                    ctxt, xmlNodePtr node,
                                                    xmlRelaxNGDefinePtr
                                                    def);
static xmlRelaxNGGrammarPtr xmlRelaxNGParseGrammar(xmlRelaxNGParserCtxtPtr
                                                   ctxt, xmlNodePtr nodes);
static int xmlRelaxNGElementMatch(xmlRelaxNGValidCtxtPtr ctxt,
                                  xmlRelaxNGDefinePtr define,
                                  xmlNodePtr elem);


#define IS_BLANK_NODE(n) (xmlRelaxNGIsBlank((n)->content))

/**
 * xmlRelaxNGIsNullable:
 * @define:  the definition to verify
 *
 * Check if a definition is nullable.
 *
 * Returns 1 if yes, 0 if no and -1 in case of error
 */
static int
xmlRelaxNGIsNullable(xmlRelaxNGDefinePtr define)
{
    int ret;

    if (define == NULL)
        return (-1);

    if (define->dflags & IS_NULLABLE)
        return (1);
    if (define->dflags & IS_NOT_NULLABLE)
        return (0);
    switch (define->type) {
        case XML_RELAXNG_EMPTY:
        case XML_RELAXNG_TEXT:
            ret = 1;
            break;
        case XML_RELAXNG_NOOP:
        case XML_RELAXNG_DEF:
        case XML_RELAXNG_REF:
        case XML_RELAXNG_EXTERNALREF:
        case XML_RELAXNG_PARENTREF:
        case XML_RELAXNG_ONEORMORE:
            ret = xmlRelaxNGIsNullable(define->content);
            break;
        case XML_RELAXNG_EXCEPT:
        case XML_RELAXNG_NOT_ALLOWED:
        case XML_RELAXNG_ELEMENT:
        case XML_RELAXNG_DATATYPE:
        case XML_RELAXNG_PARAM:
        case XML_RELAXNG_VALUE:
        case XML_RELAXNG_LIST:
        case XML_RELAXNG_ATTRIBUTE:
            ret = 0;
            break;
        case XML_RELAXNG_CHOICE:{
                xmlRelaxNGDefinePtr list = define->content;

                while (list != NULL) {
                    ret = xmlRelaxNGIsNullable(list);
                    if (ret != 0)
                        goto done;
                    list = list->next;
                }
                ret = 0;
                break;
            }
        case XML_RELAXNG_START:
        case XML_RELAXNG_INTERLEAVE:
        case XML_RELAXNG_GROUP:{
                xmlRelaxNGDefinePtr list = define->content;

                while (list != NULL) {
                    ret = xmlRelaxNGIsNullable(list);
                    if (ret != 1)
                        goto done;
                    list = list->next;
                }
                return (1);
            }
        default:
            return (-1);
    }
  done:
    if (ret == 0)
        define->dflags |= IS_NOT_NULLABLE;
    if (ret == 1)
        define->dflags |= IS_NULLABLE;
    return (ret);
}

/**
 * xmlRelaxNGIsBlank:
 * @str:  a string
 *
 * Check if a string is ignorable c.f. 4.2. Whitespace
 *
 * Returns 1 if the string is NULL or made of blanks chars, 0 otherwise
 */
static int
xmlRelaxNGIsBlank(xmlChar * str)
{
    if (str == NULL)
        return (1);
    while (*str != 0) {
        if (!(IS_BLANK_CH(*str)))
            return (0);
        str++;
    }
    return (1);
}

/**
 * xmlRelaxNGGetDataTypeLibrary:
 * @ctxt:  a Relax-NG parser context
 * @node:  the current data or value element
 *
 * Applies algorithm from 4.3. datatypeLibrary attribute
 *
 * Returns the datatypeLibary value or NULL if not found
 */
static xmlChar *
xmlRelaxNGGetDataTypeLibrary(xmlRelaxNGParserCtxtPtr ctxt ATTRIBUTE_UNUSED,
                             xmlNodePtr node)
{
    xmlChar *ret, *escape;

    if ((IS_RELAXNG(node, "data")) || (IS_RELAXNG(node, "value"))) {
        ret = xmlGetProp(node, BAD_CAST "datatypeLibrary");
        if (ret != NULL) {
            if (ret[0] == 0) {
                xmlFree(ret);
                return (NULL);
            }
            escape = xmlURIEscapeStr(ret, BAD_CAST ":/#?");
            if (escape == NULL) {
                return (ret);
            }
            xmlFree(ret);
            return (escape);
        }
    }
    node = node->parent;
    while ((node != NULL) && (node->type == XML_ELEMENT_NODE)) {
        ret = xmlGetProp(node, BAD_CAST "datatypeLibrary");
        if (ret != NULL) {
            if (ret[0] == 0) {
                xmlFree(ret);
                return (NULL);
            }
            escape = xmlURIEscapeStr(ret, BAD_CAST ":/#?");
            if (escape == NULL) {
                return (ret);
            }
            xmlFree(ret);
            return (escape);
        }
        node = node->parent;
    }
    return (NULL);
}

/**
 * xmlRelaxNGParseValue:
 * @ctxt:  a Relax-NG parser context
 * @node:  the data node.
 *
 * parse the content of a RelaxNG value node.
 *
 * Returns the definition pointer or NULL in case of error
 */
static xmlRelaxNGDefinePtr
xmlRelaxNGParseValue(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
{
    xmlRelaxNGDefinePtr def = NULL;
    xmlRelaxNGTypeLibraryPtr lib = NULL;
    xmlChar *type;
    xmlChar *library;
    int success = 0;

    def = xmlRelaxNGNewDefine(ctxt, node);
    if (def == NULL)
        return (NULL);
    def->type = XML_RELAXNG_VALUE;

    type = xmlGetProp(node, BAD_CAST "type");
    if (type != NULL) {
        xmlRelaxNGNormExtSpace(type);
        if (xmlValidateNCName(type, 0)) {
            xmlRngPErr(ctxt, node, XML_RNGP_TYPE_VALUE,
                       "value type '%s' is not an NCName\n", type, NULL);
        }
        library = xmlRelaxNGGetDataTypeLibrary(ctxt, node);
        if (library == NULL)
            library =
                xmlStrdup(BAD_CAST "http://relaxng.org/ns/structure/1.0");

        def->name = type;
        def->ns = library;

        lib = (xmlRelaxNGTypeLibraryPtr)
            xmlHashLookup(xmlRelaxNGRegisteredTypes, library);
        if (lib == NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_UNKNOWN_TYPE_LIB,
                       "Use of unregistered type library '%s'\n", library,
                       NULL);
            def->data = NULL;
        } else {
            def->data = lib;
            if (lib->have == NULL) {
                xmlRngPErr(ctxt, node, XML_RNGP_ERROR_TYPE_LIB,
                           "Internal error with type library '%s': no 'have'\n",
                           library, NULL);
            } else {
                success = lib->have(lib->data, def->name);
                if (success != 1) {
                    xmlRngPErr(ctxt, node, XML_RNGP_TYPE_NOT_FOUND,
                               "Error type '%s' is not exported by type library '%s'\n",
                               def->name, library);
                }
            }
        }
    }
    if (node->children == NULL) {
        def->value = xmlStrdup(BAD_CAST "");
    } else if (((node->children->type != XML_TEXT_NODE) &&
                (node->children->type != XML_CDATA_SECTION_NODE)) ||
               (node->children->next != NULL)) {
        xmlRngPErr(ctxt, node, XML_RNGP_TEXT_EXPECTED,
                   "Expecting a single text value for <value>content\n",
                   NULL, NULL);
    } else if (def != NULL) {
        def->value = xmlNodeGetContent(node);
        if (def->value == NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_VALUE_NO_CONTENT,
                       "Element <value> has no content\n", NULL, NULL);
        } else if ((lib != NULL) && (lib->check != NULL) && (success == 1)) {
            void *val = NULL;

            success =
                lib->check(lib->data, def->name, def->value, &val, node);
            if (success != 1) {
                xmlRngPErr(ctxt, node, XML_RNGP_INVALID_VALUE,
                           "Value '%s' is not acceptable for type '%s'\n",
                           def->value, def->name);
            } else {
                if (val != NULL)
                    def->attrs = val;
            }
        }
    }
    return (def);
}

/**
 * xmlRelaxNGParseData:
 * @ctxt:  a Relax-NG parser context
 * @node:  the data node.
 *
 * parse the content of a RelaxNG data node.
 *
 * Returns the definition pointer or NULL in case of error
 */
static xmlRelaxNGDefinePtr
xmlRelaxNGParseData(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
{
    xmlRelaxNGDefinePtr def = NULL, except;
    xmlRelaxNGDefinePtr param, lastparam = NULL;
    xmlRelaxNGTypeLibraryPtr lib;
    xmlChar *type;
    xmlChar *library;
    xmlNodePtr content;
    int tmp;

    type = xmlGetProp(node, BAD_CAST "type");
    if (type == NULL) {
        xmlRngPErr(ctxt, node, XML_RNGP_TYPE_MISSING, "data has no type\n", NULL,
                   NULL);
        return (NULL);
    }
    xmlRelaxNGNormExtSpace(type);
    if (xmlValidateNCName(type, 0)) {
        xmlRngPErr(ctxt, node, XML_RNGP_TYPE_VALUE,
                   "data type '%s' is not an NCName\n", type, NULL);
    }
    library = xmlRelaxNGGetDataTypeLibrary(ctxt, node);
    if (library == NULL)
        library =
            xmlStrdup(BAD_CAST "http://relaxng.org/ns/structure/1.0");

    def = xmlRelaxNGNewDefine(ctxt, node);
    if (def == NULL) {
        xmlFree(type);
        return (NULL);
    }
    def->type = XML_RELAXNG_DATATYPE;
    def->name = type;
    def->ns = library;

    lib = (xmlRelaxNGTypeLibraryPtr)
        xmlHashLookup(xmlRelaxNGRegisteredTypes, library);
    if (lib == NULL) {
        xmlRngPErr(ctxt, node, XML_RNGP_UNKNOWN_TYPE_LIB,
                   "Use of unregistered type library '%s'\n", library,
                   NULL);
        def->data = NULL;
    } else {
        def->data = lib;
        if (lib->have == NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_ERROR_TYPE_LIB,
                       "Internal error with type library '%s': no 'have'\n",
                       library, NULL);
        } else {
            tmp = lib->have(lib->data, def->name);
            if (tmp != 1) {
                xmlRngPErr(ctxt, node, XML_RNGP_TYPE_NOT_FOUND,
                           "Error type '%s' is not exported by type library '%s'\n",
                           def->name, library);
            } else
                if ((xmlStrEqual
                     (library,
                      BAD_CAST
                      "http://www.w3.org/2001/XMLSchema-datatypes"))
                    && ((xmlStrEqual(def->name, BAD_CAST "IDREF"))
                        || (xmlStrEqual(def->name, BAD_CAST "IDREFS")))) {
                ctxt->idref = 1;
            }
        }
    }
    content = node->children;

    /*
     * Handle optional params
     */
    while (content != NULL) {
        if (!xmlStrEqual(content->name, BAD_CAST "param"))
            break;
        if (xmlStrEqual(library,
                        BAD_CAST "http://relaxng.org/ns/structure/1.0")) {
            xmlRngPErr(ctxt, node, XML_RNGP_PARAM_FORBIDDEN,
                       "Type library '%s' does not allow type parameters\n",
                       library, NULL);
            content = content->next;
            while ((content != NULL) &&
                   (xmlStrEqual(content->name, BAD_CAST "param")))
                content = content->next;
        } else {
            param = xmlRelaxNGNewDefine(ctxt, node);
            if (param != NULL) {
                param->type = XML_RELAXNG_PARAM;
                param->name = xmlGetProp(content, BAD_CAST "name");
                if (param->name == NULL) {
                    xmlRngPErr(ctxt, node, XML_RNGP_PARAM_NAME_MISSING,
                               "param has no name\n", NULL, NULL);
                }
                param->value = xmlNodeGetContent(content);
                if (lastparam == NULL) {
                    def->attrs = lastparam = param;
                } else {
                    lastparam->next = param;
                    lastparam = param;
                }
                if (lib != NULL) {
                }
            }
            content = content->next;
        }
    }
    /*
     * Handle optional except
     */
    if ((content != NULL)
        && (xmlStrEqual(content->name, BAD_CAST "except"))) {
        xmlNodePtr child;
        xmlRelaxNGDefinePtr tmp2, last = NULL;

        except = xmlRelaxNGNewDefine(ctxt, node);
        if (except == NULL) {
            return (def);
        }
        except->type = XML_RELAXNG_EXCEPT;
        child = content->children;
	def->content = except;
        if (child == NULL) {
            xmlRngPErr(ctxt, content, XML_RNGP_EXCEPT_NO_CONTENT,
                       "except has no content\n", NULL, NULL);
        }
        while (child != NULL) {
            tmp2 = xmlRelaxNGParsePattern(ctxt, child);
            if (tmp2 != NULL) {
                if (last == NULL) {
                    except->content = last = tmp2;
                } else {
                    last->next = tmp2;
                    last = tmp2;
                }
            }
            child = child->next;
        }
        content = content->next;
    }
    /*
     * Check there is no unhandled data
     */
    if (content != NULL) {
        xmlRngPErr(ctxt, content, XML_RNGP_DATA_CONTENT,
                   "Element data has unexpected content %s\n",
                   content->name, NULL);
    }

    return (def);
}

static const xmlChar *invalidName = BAD_CAST "\1";

/**
 * xmlRelaxNGCompareNameClasses:
 * @defs1:  the first element/attribute defs
 * @defs2:  the second element/attribute defs
 * @name:  the restriction on the name
 * @ns:  the restriction on the namespace
 *
 * Compare the 2 lists of element definitions. The comparison is
 * that if both lists do not accept the same QNames, it returns 1
 * If the 2 lists can accept the same QName the comparison returns 0
 *
 * Returns 1 disttinct, 0 if equal
 */
static int
xmlRelaxNGCompareNameClasses(xmlRelaxNGDefinePtr def1,
                             xmlRelaxNGDefinePtr def2)
{
    int ret = 1;
    xmlNode node;
    xmlNs ns;
    xmlRelaxNGValidCtxt ctxt;

    memset(&ctxt, 0, sizeof(xmlRelaxNGValidCtxt));

    ctxt.flags = FLAGS_IGNORABLE | FLAGS_NOERROR;

    if ((def1->type == XML_RELAXNG_ELEMENT) ||
        (def1->type == XML_RELAXNG_ATTRIBUTE)) {
        if (def2->type == XML_RELAXNG_TEXT)
            return (1);
        if (def1->name != NULL) {
            node.name = def1->name;
        } else {
            node.name = invalidName;
        }
        if (def1->ns != NULL) {
            if (def1->ns[0] == 0) {
                node.ns = NULL;
            } else {
	        node.ns = &ns;
                ns.href = def1->ns;
            }
        } else {
            node.ns = NULL;
        }
        if (xmlRelaxNGElementMatch(&ctxt, def2, &node)) {
            if (def1->nameClass != NULL) {
                ret = xmlRelaxNGCompareNameClasses(def1->nameClass, def2);
            } else {
                ret = 0;
            }
        } else {
            ret = 1;
        }
    } else if (def1->type == XML_RELAXNG_TEXT) {
        if (def2->type == XML_RELAXNG_TEXT)
            return (0);
        return (1);
    } else if (def1->type == XML_RELAXNG_EXCEPT) {
        TODO ret = 0;
    } else {
        TODO ret = 0;
    }
    if (ret == 0)
        return (ret);
    if ((def2->type == XML_RELAXNG_ELEMENT) ||
        (def2->type == XML_RELAXNG_ATTRIBUTE)) {
        if (def2->name != NULL) {
            node.name = def2->name;
        } else {
            node.name = invalidName;
        }
        node.ns = &ns;
        if (def2->ns != NULL) {
            if (def2->ns[0] == 0) {
                node.ns = NULL;
            } else {
                ns.href = def2->ns;
            }
        } else {
            ns.href = invalidName;
        }
        if (xmlRelaxNGElementMatch(&ctxt, def1, &node)) {
            if (def2->nameClass != NULL) {
                ret = xmlRelaxNGCompareNameClasses(def2->nameClass, def1);
            } else {
                ret = 0;
            }
        } else {
            ret = 1;
        }
    } else {
        TODO ret = 0;
    }

    return (ret);
}

/**
 * xmlRelaxNGCompareElemDefLists:
 * @ctxt:  a Relax-NG parser context
 * @defs1:  the first list of element/attribute defs
 * @defs2:  the second list of element/attribute defs
 *
 * Compare the 2 lists of element or attribute definitions. The comparison
 * is that if both lists do not accept the same QNames, it returns 1
 * If the 2 lists can accept the same QName the comparison returns 0
 *
 * Returns 1 disttinct, 0 if equal
 */
static int
xmlRelaxNGCompareElemDefLists(xmlRelaxNGParserCtxtPtr ctxt
                              ATTRIBUTE_UNUSED, xmlRelaxNGDefinePtr * def1,
                              xmlRelaxNGDefinePtr * def2)
{
    xmlRelaxNGDefinePtr *basedef2 = def2;

    if ((def1 == NULL) || (def2 == NULL))
        return (1);
    if ((*def1 == NULL) || (*def2 == NULL))
        return (1);
    while (*def1 != NULL) {
        while ((*def2) != NULL) {
            if (xmlRelaxNGCompareNameClasses(*def1, *def2) == 0)
                return (0);
            def2++;
        }
        def2 = basedef2;
        def1++;
    }
    return (1);
}

/**
 * xmlRelaxNGGenerateAttributes:
 * @ctxt:  a Relax-NG parser context
 * @def:  the definition definition
 *
 * Check if the definition can only generate attributes
 *
 * Returns 1 if yes, 0 if no and -1 in case of error.
 */
static int
xmlRelaxNGGenerateAttributes(xmlRelaxNGParserCtxtPtr ctxt,
                             xmlRelaxNGDefinePtr def)
{
    xmlRelaxNGDefinePtr parent, cur, tmp;

    /*
     * Don't run that check in case of error. Infinite recursion
     * becomes possible.
     */
    if (ctxt->nbErrors != 0)
        return (-1);

    parent = NULL;
    cur = def;
    while (cur != NULL) {
        if ((cur->type == XML_RELAXNG_ELEMENT) ||
            (cur->type == XML_RELAXNG_TEXT) ||
            (cur->type == XML_RELAXNG_DATATYPE) ||
            (cur->type == XML_RELAXNG_PARAM) ||
            (cur->type == XML_RELAXNG_LIST) ||
            (cur->type == XML_RELAXNG_VALUE) ||
            (cur->type == XML_RELAXNG_EMPTY))
            return (0);
        if ((cur->type == XML_RELAXNG_CHOICE) ||
            (cur->type == XML_RELAXNG_INTERLEAVE) ||
            (cur->type == XML_RELAXNG_GROUP) ||
            (cur->type == XML_RELAXNG_ONEORMORE) ||
            (cur->type == XML_RELAXNG_ZEROORMORE) ||
            (cur->type == XML_RELAXNG_OPTIONAL) ||
            (cur->type == XML_RELAXNG_PARENTREF) ||
            (cur->type == XML_RELAXNG_EXTERNALREF) ||
            (cur->type == XML_RELAXNG_REF) ||
            (cur->type == XML_RELAXNG_DEF)) {
            if (cur->content != NULL) {
                parent = cur;
                cur = cur->content;
                tmp = cur;
                while (tmp != NULL) {
                    tmp->parent = parent;
                    tmp = tmp->next;
                }
                continue;
            }
        }
        if (cur == def)
            break;
        if (cur->next != NULL) {
            cur = cur->next;
            continue;
        }
        do {
            cur = cur->parent;
            if (cur == NULL)
                break;
            if (cur == def)
                return (1);
            if (cur->next != NULL) {
                cur = cur->next;
                break;
            }
        } while (cur != NULL);
    }
    return (1);
}

/**
 * xmlRelaxNGGetElements:
 * @ctxt:  a Relax-NG parser context
 * @def:  the definition definition
 * @eora:  gather elements (0) or attributes (1)
 *
 * Compute the list of top elements a definition can generate
 *
 * Returns a list of elements or NULL if none was found.
 */
static xmlRelaxNGDefinePtr *
xmlRelaxNGGetElements(xmlRelaxNGParserCtxtPtr ctxt,
                      xmlRelaxNGDefinePtr def, int eora)
{
    xmlRelaxNGDefinePtr *ret = NULL, parent, cur, tmp;
    int len = 0;
    int max = 0;

    /*
     * Don't run that check in case of error. Infinite recursion
     * becomes possible.
     */
    if (ctxt->nbErrors != 0)
        return (NULL);

    parent = NULL;
    cur = def;
    while (cur != NULL) {
        if (((eora == 0) && ((cur->type == XML_RELAXNG_ELEMENT) ||
                             (cur->type == XML_RELAXNG_TEXT))) ||
            ((eora == 1) && (cur->type == XML_RELAXNG_ATTRIBUTE))) {
            if (ret == NULL) {
                max = 10;
                ret = (xmlRelaxNGDefinePtr *)
                    xmlMalloc((max + 1) * sizeof(xmlRelaxNGDefinePtr));
                if (ret == NULL) {
                    xmlRngPErrMemory(ctxt, "getting element list\n");
                    return (NULL);
                }
            } else if (max <= len) {
	        xmlRelaxNGDefinePtr *temp;

                max *= 2;
                temp = xmlRealloc(ret,
                               (max + 1) * sizeof(xmlRelaxNGDefinePtr));
                if (temp == NULL) {
                    xmlRngPErrMemory(ctxt, "getting element list\n");
		    xmlFree(ret);
                    return (NULL);
                }
		ret = temp;
            }
            ret[len++] = cur;
            ret[len] = NULL;
        } else if ((cur->type == XML_RELAXNG_CHOICE) ||
                   (cur->type == XML_RELAXNG_INTERLEAVE) ||
                   (cur->type == XML_RELAXNG_GROUP) ||
                   (cur->type == XML_RELAXNG_ONEORMORE) ||
                   (cur->type == XML_RELAXNG_ZEROORMORE) ||
                   (cur->type == XML_RELAXNG_OPTIONAL) ||
                   (cur->type == XML_RELAXNG_PARENTREF) ||
                   (cur->type == XML_RELAXNG_REF) ||
                   (cur->type == XML_RELAXNG_DEF) ||
		   (cur->type == XML_RELAXNG_EXTERNALREF)) {
            /*
             * Don't go within elements or attributes or string values.
             * Just gather the element top list
             */
            if (cur->content != NULL) {
                parent = cur;
                cur = cur->content;
                tmp = cur;
                while (tmp != NULL) {
                    tmp->parent = parent;
                    tmp = tmp->next;
                }
                continue;
            }
        }
        if (cur == def)
            break;
        if (cur->next != NULL) {
            cur = cur->next;
            continue;
        }
        do {
            cur = cur->parent;
            if (cur == NULL)
                break;
            if (cur == def)
                return (ret);
            if (cur->next != NULL) {
                cur = cur->next;
                break;
            }
        } while (cur != NULL);
    }
    return (ret);
}

/**
 * xmlRelaxNGCheckChoiceDeterminism:
 * @ctxt:  a Relax-NG parser context
 * @def:  the choice definition
 *
 * Also used to find indeterministic pattern in choice
 */
static void
xmlRelaxNGCheckChoiceDeterminism(xmlRelaxNGParserCtxtPtr ctxt,
                                 xmlRelaxNGDefinePtr def)
{
    xmlRelaxNGDefinePtr **list;
    xmlRelaxNGDefinePtr cur;
    int nbchild = 0, i, j, ret;
    int is_nullable = 0;
    int is_indeterminist = 0;
    xmlHashTablePtr triage = NULL;
    int is_triable = 1;

    if ((def == NULL) || (def->type != XML_RELAXNG_CHOICE))
        return;

    if (def->dflags & IS_PROCESSED)
        return;

    /*
     * Don't run that check in case of error. Infinite recursion
     * becomes possible.
     */
    if (ctxt->nbErrors != 0)
        return;

    is_nullable = xmlRelaxNGIsNullable(def);

    cur = def->content;
    while (cur != NULL) {
        nbchild++;
        cur = cur->next;
    }

    list = (xmlRelaxNGDefinePtr **) xmlMalloc(nbchild *
                                              sizeof(xmlRelaxNGDefinePtr
                                                     *));
    if (list == NULL) {
        xmlRngPErrMemory(ctxt, "building choice\n");
        return;
    }
    i = 0;
    /*
     * a bit strong but safe
     */
    if (is_nullable == 0) {
        triage = xmlHashCreate(10);
    } else {
        is_triable = 0;
    }
    cur = def->content;
    while (cur != NULL) {
        list[i] = xmlRelaxNGGetElements(ctxt, cur, 0);
        if ((list[i] == NULL) || (list[i][0] == NULL)) {
            is_triable = 0;
        } else if (is_triable == 1) {
            xmlRelaxNGDefinePtr *tmp;
            int res;

            tmp = list[i];
            while ((*tmp != NULL) && (is_triable == 1)) {
                if ((*tmp)->type == XML_RELAXNG_TEXT) {
                    res = xmlHashAddEntry2(triage,
                                           BAD_CAST "#text", NULL,
                                           (void *) cur);
                    if (res != 0)
                        is_triable = -1;
                } else if (((*tmp)->type == XML_RELAXNG_ELEMENT) &&
                           ((*tmp)->name != NULL)) {
                    if (((*tmp)->ns == NULL) || ((*tmp)->ns[0] == 0))
                        res = xmlHashAddEntry2(triage,
                                               (*tmp)->name, NULL,
                                               (void *) cur);
                    else
                        res = xmlHashAddEntry2(triage,
                                               (*tmp)->name, (*tmp)->ns,
                                               (void *) cur);
                    if (res != 0)
                        is_triable = -1;
                } else if ((*tmp)->type == XML_RELAXNG_ELEMENT) {
                    if (((*tmp)->ns == NULL) || ((*tmp)->ns[0] == 0))
                        res = xmlHashAddEntry2(triage,
                                               BAD_CAST "#any", NULL,
                                               (void *) cur);
                    else
                        res = xmlHashAddEntry2(triage,
                                               BAD_CAST "#any", (*tmp)->ns,
                                               (void *) cur);
                    if (res != 0)
                        is_triable = -1;
                } else {
                    is_triable = -1;
                }
                tmp++;
            }
        }
        i++;
        cur = cur->next;
    }

    for (i = 0; i < nbchild; i++) {
        if (list[i] == NULL)
            continue;
        for (j = 0; j < i; j++) {
            if (list[j] == NULL)
                continue;
            ret = xmlRelaxNGCompareElemDefLists(ctxt, list[i], list[j]);
            if (ret == 0) {
                is_indeterminist = 1;
            }
        }
    }
    for (i = 0; i < nbchild; i++) {
        if (list[i] != NULL)
            xmlFree(list[i]);
    }

    xmlFree(list);
    if (is_indeterminist) {
        def->dflags |= IS_INDETERMINIST;
    }
    if (is_triable == 1) {
        def->dflags |= IS_TRIABLE;
        def->data = triage;
    } else if (triage != NULL) {
        xmlHashFree(triage, NULL);
    }
    def->dflags |= IS_PROCESSED;
}

/**
 * xmlRelaxNGCheckGroupAttrs:
 * @ctxt:  a Relax-NG parser context
 * @def:  the group definition
 *
 * Detects violations of rule 7.3
 */
static void
xmlRelaxNGCheckGroupAttrs(xmlRelaxNGParserCtxtPtr ctxt,
                          xmlRelaxNGDefinePtr def)
{
    xmlRelaxNGDefinePtr **list;
    xmlRelaxNGDefinePtr cur;
    int nbchild = 0, i, j, ret;

    if ((def == NULL) ||
        ((def->type != XML_RELAXNG_GROUP) &&
         (def->type != XML_RELAXNG_ELEMENT)))
        return;

    if (def->dflags & IS_PROCESSED)
        return;

    /*
     * Don't run that check in case of error. Infinite recursion
     * becomes possible.
     */
    if (ctxt->nbErrors != 0)
        return;

    cur = def->attrs;
    while (cur != NULL) {
        nbchild++;
        cur = cur->next;
    }
    cur = def->content;
    while (cur != NULL) {
        nbchild++;
        cur = cur->next;
    }

    list = (xmlRelaxNGDefinePtr **) xmlMalloc(nbchild *
                                              sizeof(xmlRelaxNGDefinePtr
                                                     *));
    if (list == NULL) {
        xmlRngPErrMemory(ctxt, "building group\n");
        return;
    }
    i = 0;
    cur = def->attrs;
    while (cur != NULL) {
        list[i] = xmlRelaxNGGetElements(ctxt, cur, 1);
        i++;
        cur = cur->next;
    }
    cur = def->content;
    while (cur != NULL) {
        list[i] = xmlRelaxNGGetElements(ctxt, cur, 1);
        i++;
        cur = cur->next;
    }

    for (i = 0; i < nbchild; i++) {
        if (list[i] == NULL)
            continue;
        for (j = 0; j < i; j++) {
            if (list[j] == NULL)
                continue;
            ret = xmlRelaxNGCompareElemDefLists(ctxt, list[i], list[j]);
            if (ret == 0) {
                xmlRngPErr(ctxt, def->node, XML_RNGP_GROUP_ATTR_CONFLICT,
                           "Attributes conflicts in group\n", NULL, NULL);
            }
        }
    }
    for (i = 0; i < nbchild; i++) {
        if (list[i] != NULL)
            xmlFree(list[i]);
    }

    xmlFree(list);
    def->dflags |= IS_PROCESSED;
}

/**
 * xmlRelaxNGComputeInterleaves:
 * @def:  the interleave definition
 * @ctxt:  a Relax-NG parser context
 * @name:  the definition name
 *
 * A lot of work for preprocessing interleave definitions
 * is potentially needed to get a decent execution speed at runtime
 *   - trying to get a total order on the element nodes generated
 *     by the interleaves, order the list of interleave definitions
 *     following that order.
 *   - if <text/> is used to handle mixed content, it is better to
 *     flag this in the define and simplify the runtime checking
 *     algorithm
 */
static void
xmlRelaxNGComputeInterleaves(xmlRelaxNGDefinePtr def,
                             xmlRelaxNGParserCtxtPtr ctxt,
                             xmlChar * name ATTRIBUTE_UNUSED)
{
    xmlRelaxNGDefinePtr cur, *tmp;

    xmlRelaxNGPartitionPtr partitions = NULL;
    xmlRelaxNGInterleaveGroupPtr *groups = NULL;
    xmlRelaxNGInterleaveGroupPtr group;
    int i, j, ret, res;
    int nbgroups = 0;
    int nbchild = 0;
    int is_mixed = 0;
    int is_determinist = 1;

    /*
     * Don't run that check in case of error. Infinite recursion
     * becomes possible.
     */
    if (ctxt->nbErrors != 0)
        return;

#ifdef DEBUG_INTERLEAVE
    xmlGenericError(xmlGenericErrorContext,
                    "xmlRelaxNGComputeInterleaves(%s)\n", name);
#endif
    cur = def->content;
    while (cur != NULL) {
        nbchild++;
        cur = cur->next;
    }

#ifdef DEBUG_INTERLEAVE
    xmlGenericError(xmlGenericErrorContext, "  %d child\n", nbchild);
#endif
    groups = (xmlRelaxNGInterleaveGroupPtr *)
        xmlMalloc(nbchild * sizeof(xmlRelaxNGInterleaveGroupPtr));
    if (groups == NULL)
        goto error;
    cur = def->content;
    while (cur != NULL) {
        groups[nbgroups] = (xmlRelaxNGInterleaveGroupPtr)
            xmlMalloc(sizeof(xmlRelaxNGInterleaveGroup));
        if (groups[nbgroups] == NULL)
            goto error;
        if (cur->type == XML_RELAXNG_TEXT)
            is_mixed++;
        groups[nbgroups]->rule = cur;
        groups[nbgroups]->defs = xmlRelaxNGGetElements(ctxt, cur, 0);
        groups[nbgroups]->attrs = xmlRelaxNGGetElements(ctxt, cur, 1);
        nbgroups++;
        cur = cur->next;
    }
#ifdef DEBUG_INTERLEAVE
    xmlGenericError(xmlGenericErrorContext, "  %d groups\n", nbgroups);
#endif

    /*
     * Let's check that all rules makes a partitions according to 7.4
     */
    partitions = (xmlRelaxNGPartitionPtr)
        xmlMalloc(sizeof(xmlRelaxNGPartition));
    if (partitions == NULL)
        goto error;
    memset(partitions, 0, sizeof(xmlRelaxNGPartition));
    partitions->nbgroups = nbgroups;
    partitions->triage = xmlHashCreate(nbgroups);
    for (i = 0; i < nbgroups; i++) {
        group = groups[i];
        for (j = i + 1; j < nbgroups; j++) {
            if (groups[j] == NULL)
                continue;

            ret = xmlRelaxNGCompareElemDefLists(ctxt, group->defs,
                                                groups[j]->defs);
            if (ret == 0) {
                xmlRngPErr(ctxt, def->node, XML_RNGP_ELEM_TEXT_CONFLICT,
                           "Element or text conflicts in interleave\n",
                           NULL, NULL);
            }
            ret = xmlRelaxNGCompareElemDefLists(ctxt, group->attrs,
                                                groups[j]->attrs);
            if (ret == 0) {
                xmlRngPErr(ctxt, def->node, XML_RNGP_ATTR_CONFLICT,
                           "Attributes conflicts in interleave\n", NULL,
                           NULL);
            }
        }
        tmp = group->defs;
        if ((tmp != NULL) && (*tmp != NULL)) {
            while (*tmp != NULL) {
                if ((*tmp)->type == XML_RELAXNG_TEXT) {
                    res = xmlHashAddEntry2(partitions->triage,
                                           BAD_CAST "#text", NULL,
                                           (void *) (long) (i + 1));
                    if (res != 0)
                        is_determinist = -1;
                } else if (((*tmp)->type == XML_RELAXNG_ELEMENT) &&
                           ((*tmp)->name != NULL)) {
                    if (((*tmp)->ns == NULL) || ((*tmp)->ns[0] == 0))
                        res = xmlHashAddEntry2(partitions->triage,
                                               (*tmp)->name, NULL,
                                               (void *) (long) (i + 1));
                    else
                        res = xmlHashAddEntry2(partitions->triage,
                                               (*tmp)->name, (*tmp)->ns,
                                               (void *) (long) (i + 1));
                    if (res != 0)
                        is_determinist = -1;
                } else if ((*tmp)->type == XML_RELAXNG_ELEMENT) {
                    if (((*tmp)->ns == NULL) || ((*tmp)->ns[0] == 0))
                        res = xmlHashAddEntry2(partitions->triage,
                                               BAD_CAST "#any", NULL,
                                               (void *) (long) (i + 1));
                    else
                        res = xmlHashAddEntry2(partitions->triage,
                                               BAD_CAST "#any", (*tmp)->ns,
                                               (void *) (long) (i + 1));
                    if ((*tmp)->nameClass != NULL)
                        is_determinist = 2;
                    if (res != 0)
                        is_determinist = -1;
                } else {
                    is_determinist = -1;
                }
                tmp++;
            }
        } else {
            is_determinist = 0;
        }
    }
    partitions->groups = groups;

    /*
     * and save the partition list back in the def
     */
    def->data = partitions;
    if (is_mixed != 0)
        def->dflags |= IS_MIXED;
    if (is_determinist == 1)
        partitions->flags = IS_DETERMINIST;
    if (is_determinist == 2)
        partitions->flags = IS_DETERMINIST | IS_NEEDCHECK;
    return;

  error:
    xmlRngPErrMemory(ctxt, "in interleave computation\n");
    if (groups != NULL) {
        for (i = 0; i < nbgroups; i++)
            if (groups[i] != NULL) {
                if (groups[i]->defs != NULL)
                    xmlFree(groups[i]->defs);
                xmlFree(groups[i]);
            }
        xmlFree(groups);
    }
    xmlRelaxNGFreePartition(partitions);
}

/**
 * xmlRelaxNGParseInterleave:
 * @ctxt:  a Relax-NG parser context
 * @node:  the data node.
 *
 * parse the content of a RelaxNG interleave node.
 *
 * Returns the definition pointer or NULL in case of error
 */
static xmlRelaxNGDefinePtr
xmlRelaxNGParseInterleave(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
{
    xmlRelaxNGDefinePtr def = NULL;
    xmlRelaxNGDefinePtr last = NULL, cur;
    xmlNodePtr child;

    def = xmlRelaxNGNewDefine(ctxt, node);
    if (def == NULL) {
        return (NULL);
    }
    def->type = XML_RELAXNG_INTERLEAVE;

    if (ctxt->interleaves == NULL)
        ctxt->interleaves = xmlHashCreate(10);
    if (ctxt->interleaves == NULL) {
        xmlRngPErrMemory(ctxt, "create interleaves\n");
    } else {
        char name[32];

        snprintf(name, 32, "interleave%d", ctxt->nbInterleaves++);
        if (xmlHashAddEntry(ctxt->interleaves, BAD_CAST name, def) < 0) {
            xmlRngPErr(ctxt, node, XML_RNGP_INTERLEAVE_ADD,
                       "Failed to add %s to hash table\n",
		       (const xmlChar *) name, NULL);
        }
    }
    child = node->children;
    if (child == NULL) {
        xmlRngPErr(ctxt, node, XML_RNGP_INTERLEAVE_NO_CONTENT,
                   "Element interleave is empty\n", NULL, NULL);
    }
    while (child != NULL) {
        if (IS_RELAXNG(child, "element")) {
            cur = xmlRelaxNGParseElement(ctxt, child);
        } else {
            cur = xmlRelaxNGParsePattern(ctxt, child);
        }
        if (cur != NULL) {
            cur->parent = def;
            if (last == NULL) {
                def->content = last = cur;
            } else {
                last->next = cur;
                last = cur;
            }
        }
        child = child->next;
    }

    return (def);
}

/**
 * xmlRelaxNGParseInclude:
 * @ctxt:  a Relax-NG parser context
 * @node:  the include node
 *
 * Integrate the content of an include node in the current grammar
 *
 * Returns 0 in case of success or -1 in case of error
 */
static int
xmlRelaxNGParseInclude(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
{
    xmlRelaxNGIncludePtr incl;
    xmlNodePtr root;
    int ret = 0, tmp;

    incl = node->psvi;
    if (incl == NULL) {
        xmlRngPErr(ctxt, node, XML_RNGP_INCLUDE_EMPTY,
                   "Include node has no data\n", NULL, NULL);
        return (-1);
    }
    root = xmlDocGetRootElement(incl->doc);
    if (root == NULL) {
        xmlRngPErr(ctxt, node, XML_RNGP_EMPTY, "Include document is empty\n",
                   NULL, NULL);
        return (-1);
    }
    if (!xmlStrEqual(root->name, BAD_CAST "grammar")) {
        xmlRngPErr(ctxt, node, XML_RNGP_GRAMMAR_MISSING,
                   "Include document root is not a grammar\n", NULL, NULL);
        return (-1);
    }

    /*
     * Merge the definition from both the include and the internal list
     */
    if (root->children != NULL) {
        tmp = xmlRelaxNGParseGrammarContent(ctxt, root->children);
        if (tmp != 0)
            ret = -1;
    }
    if (node->children != NULL) {
        tmp = xmlRelaxNGParseGrammarContent(ctxt, node->children);
        if (tmp != 0)
            ret = -1;
    }
    return (ret);
}

/**
 * xmlRelaxNGParseDefine:
 * @ctxt:  a Relax-NG parser context
 * @node:  the define node
 *
 * parse the content of a RelaxNG define element node.
 *
 * Returns 0 in case of success or -1 in case of error
 */
static int
xmlRelaxNGParseDefine(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
{
    xmlChar *name;
    int ret = 0, tmp;
    xmlRelaxNGDefinePtr def;
    const xmlChar *olddefine;

    name = xmlGetProp(node, BAD_CAST "name");
    if (name == NULL) {
        xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_NAME_MISSING,
                   "define has no name\n", NULL, NULL);
    } else {
        xmlRelaxNGNormExtSpace(name);
        if (xmlValidateNCName(name, 0)) {
            xmlRngPErr(ctxt, node, XML_RNGP_INVALID_DEFINE_NAME,
                       "define name '%s' is not an NCName\n", name, NULL);
        }
        def = xmlRelaxNGNewDefine(ctxt, node);
        if (def == NULL) {
            xmlFree(name);
            return (-1);
        }
        def->type = XML_RELAXNG_DEF;
        def->name = name;
        if (node->children == NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_EMPTY,
                       "define has no children\n", NULL, NULL);
        } else {
            olddefine = ctxt->define;
            ctxt->define = name;
            def->content =
                xmlRelaxNGParsePatterns(ctxt, node->children, 0);
            ctxt->define = olddefine;
        }
        if (ctxt->grammar->defs == NULL)
            ctxt->grammar->defs = xmlHashCreate(10);
        if (ctxt->grammar->defs == NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_CREATE_FAILED,
                       "Could not create definition hash\n", NULL, NULL);
            ret = -1;
        } else {
            tmp = xmlHashAddEntry(ctxt->grammar->defs, name, def);
            if (tmp < 0) {
                xmlRelaxNGDefinePtr prev;

                prev = xmlHashLookup(ctxt->grammar->defs, name);
                if (prev == NULL) {
                    xmlRngPErr(ctxt, node, XML_RNGP_DEFINE_CREATE_FAILED,
                               "Internal error on define aggregation of %s\n",
                               name, NULL);
                    ret = -1;
                } else {
                    while (prev->nextHash != NULL)
                        prev = prev->nextHash;
                    prev->nextHash = def;
                }
            }
        }
    }
    return (ret);
}

/**
 * xmlRelaxNGProcessExternalRef:
 * @ctxt: the parser context
 * @node:  the externlRef node
 *
 * Process and compile an externlRef node
 *
 * Returns the xmlRelaxNGDefinePtr or NULL in case of error
 */
static xmlRelaxNGDefinePtr
xmlRelaxNGProcessExternalRef(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
{
    xmlRelaxNGDocumentPtr docu;
    xmlNodePtr root, tmp;
    xmlChar *ns;
    int newNs = 0, oldflags;
    xmlRelaxNGDefinePtr def;

    docu = node->psvi;
    if (docu != NULL) {
        def = xmlRelaxNGNewDefine(ctxt, node);
        if (def == NULL)
            return (NULL);
        def->type = XML_RELAXNG_EXTERNALREF;

        if (docu->content == NULL) {
            /*
             * Then do the parsing for good
             */
            root = xmlDocGetRootElement(docu->doc);
            if (root == NULL) {
                xmlRngPErr(ctxt, node, XML_RNGP_EXTERNALREF_EMTPY,
                           "xmlRelaxNGParse: %s is empty\n", ctxt->URL,
                           NULL);
                return (NULL);
            }
            /*
             * ns transmission rules
             */
            ns = xmlGetProp(root, BAD_CAST "ns");
            if (ns == NULL) {
                tmp = node;
                while ((tmp != NULL) && (tmp->type == XML_ELEMENT_NODE)) {
                    ns = xmlGetProp(tmp, BAD_CAST "ns");
                    if (ns != NULL) {
                        break;
                    }
                    tmp = tmp->parent;
                }
                if (ns != NULL) {
                    xmlSetProp(root, BAD_CAST "ns", ns);
                    newNs = 1;
                    xmlFree(ns);
                }
            } else {
                xmlFree(ns);
            }

            /*
             * Parsing to get a precompiled schemas.
             */
            oldflags = ctxt->flags;
            ctxt->flags |= XML_RELAXNG_IN_EXTERNALREF;
            docu->schema = xmlRelaxNGParseDocument(ctxt, root);
            ctxt->flags = oldflags;
            if ((docu->schema != NULL) &&
                (docu->schema->topgrammar != NULL)) {
                docu->content = docu->schema->topgrammar->start;
            }

            /*
             * the externalRef may be reused in a different ns context
             */
            if (newNs == 1) {
                xmlUnsetProp(root, BAD_CAST "ns");
            }
        }
        def->content = docu->content;
    } else {
        def = NULL;
    }
    return (def);
}

/**
 * xmlRelaxNGParsePattern:
 * @ctxt:  a Relax-NG parser context
 * @node:  the pattern node.
 *
 * parse the content of a RelaxNG pattern node.
 *
 * Returns the definition pointer or NULL in case of error or if no
 *     pattern is generated.
 */
static xmlRelaxNGDefinePtr
xmlRelaxNGParsePattern(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node)
{
    xmlRelaxNGDefinePtr def = NULL;

    if (node == NULL) {
        return (NULL);
    }
    if (IS_RELAXNG(node, "element")) {
        def = xmlRelaxNGParseElement(ctxt, node);
    } else if (IS_RELAXNG(node, "attribute")) {
        def = xmlRelaxNGParseAttribute(ctxt, node);
    } else if (IS_RELAXNG(node, "empty")) {
        def = xmlRelaxNGNewDefine(ctxt, node);
        if (def == NULL)
            return (NULL);
        def->type = XML_RELAXNG_EMPTY;
        if (node->children != NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_NOT_EMPTY,
                       "empty: had a child node\n", NULL, NULL);
        }
    } else if (IS_RELAXNG(node, "text")) {
        def = xmlRelaxNGNewDefine(ctxt, node);
        if (def == NULL)
            return (NULL);
        def->type = XML_RELAXNG_TEXT;
        if (node->children != NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_TEXT_HAS_CHILD,
                       "text: had a child node\n", NULL, NULL);
        }
    } else if (IS_RELAXNG(node, "zeroOrMore")) {
        def = xmlRelaxNGNewDefine(ctxt, node);
        if (def == NULL)
            return (NULL);
        def->type = XML_RELAXNG_ZEROORMORE;
        if (node->children == NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
                       "Element %s is empty\n", node->name, NULL);
        } else {
            def->content =
                xmlRelaxNGParsePatterns(ctxt, node->children, 1);
        }
    } else if (IS_RELAXNG(node, "oneOrMore")) {
        def = xmlRelaxNGNewDefine(ctxt, node);
        if (def == NULL)
            return (NULL);
        def->type = XML_RELAXNG_ONEORMORE;
        if (node->children == NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
                       "Element %s is empty\n", node->name, NULL);
        } else {
            def->content =
                xmlRelaxNGParsePatterns(ctxt, node->children, 1);
        }
    } else if (IS_RELAXNG(node, "optional")) {
        def = xmlRelaxNGNewDefine(ctxt, node);
        if (def == NULL)
            return (NULL);
        def->type = XML_RELAXNG_OPTIONAL;
        if (node->children == NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
                       "Element %s is empty\n", node->name, NULL);
        } else {
            def->content =
                xmlRelaxNGParsePatterns(ctxt, node->children, 1);
        }
    } else if (IS_RELAXNG(node, "choice")) {
        def = xmlRelaxNGNewDefine(ctxt, node);
        if (def == NULL)
            return (NULL);
        def->type = XML_RELAXNG_CHOICE;
        if (node->children == NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
                       "Element %s is empty\n", node->name, NULL);
        } else {
            def->content =
                xmlRelaxNGParsePatterns(ctxt, node->children, 0);
        }
    } else if (IS_RELAXNG(node, "group")) {
        def = xmlRelaxNGNewDefine(ctxt, node);
        if (def == NULL)
            return (NULL);
        def->type = XML_RELAXNG_GROUP;
        if (node->children == NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
                       "Element %s is empty\n", node->name, NULL);
        } else {
            def->content =
                xmlRelaxNGParsePatterns(ctxt, node->children, 0);
        }
    } else if (IS_RELAXNG(node, "ref")) {
        def = xmlRelaxNGNewDefine(ctxt, node);
        if (def == NULL)
            return (NULL);
        def->type = XML_RELAXNG_REF;
        def->name = xmlGetProp(node, BAD_CAST "name");
        if (def->name == NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_REF_NO_NAME, "ref has no name\n",
                       NULL, NULL);
        } else {
            xmlRelaxNGNormExtSpace(def->name);
            if (xmlValidateNCName(def->name, 0)) {
                xmlRngPErr(ctxt, node, XML_RNGP_REF_NAME_INVALID,
                           "ref name '%s' is not an NCName\n", def->name,
                           NULL);
            }
        }
        if (node->children != NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_REF_NOT_EMPTY, "ref is not empty\n",
                       NULL, NULL);
        }
        if (ctxt->grammar->refs == NULL)
            ctxt->grammar->refs = xmlHashCreate(10);
        if (ctxt->grammar->refs == NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_REF_CREATE_FAILED,
                       "Could not create references hash\n", NULL, NULL);
            def = NULL;
        } else {
            int tmp;

            tmp = xmlHashAddEntry(ctxt->grammar->refs, def->name, def);
            if (tmp < 0) {
                xmlRelaxNGDefinePtr prev;

                prev = (xmlRelaxNGDefinePtr)
                    xmlHashLookup(ctxt->grammar->refs, def->name);
                if (prev == NULL) {
                    if (def->name != NULL) {
		        xmlRngPErr(ctxt, node, XML_RNGP_REF_CREATE_FAILED,
				   "Error refs definitions '%s'\n",
				   def->name, NULL);
                    } else {
		        xmlRngPErr(ctxt, node, XML_RNGP_REF_CREATE_FAILED,
				   "Error refs definitions\n",
				   NULL, NULL);
                    }
                    def = NULL;
                } else {
                    def->nextHash = prev->nextHash;
                    prev->nextHash = def;
                }
            }
        }
    } else if (IS_RELAXNG(node, "data")) {
        def = xmlRelaxNGParseData(ctxt, node);
    } else if (IS_RELAXNG(node, "value")) {
        def = xmlRelaxNGParseValue(ctxt, node);
    } else if (IS_RELAXNG(node, "list")) {
        def = xmlRelaxNGNewDefine(ctxt, node);
        if (def == NULL)
            return (NULL);
        def->type = XML_RELAXNG_LIST;
        if (node->children == NULL) {
            xmlRngPErr(ctxt, node, XML_RNGP_EMPTY_CONSTRUCT,
                       "Element %s is empty\n", node->name, NULL);
        } else {
            def->content =
                xmlRelaxNGParsePatterns(ctxt, node->children, 0);
        }
    } else if (IS_RELAXNG(node, "interleave")) {
        def =