tDOM: Check-in [f645e5dfe1]

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Overview

Comment:	Adding DOM tree postvalidation (only) local key constraints along the lines of xsd unqiue with selector and list of fields but with no restrictions on the XPath expressions (other then resulting a node set in case of selector and a result set with one node in case of field XPath expression).
Downloads:	Tarball \| ZIP archive \| SQL archive
Timelines:	family \| ancestors \| descendants \| both \| domlocalkey
Files:	files \| file ages \| folders
SHA3-256:	f645e5dfe14b0b43d40e0b25d01767e3f283e97b136ddcbcb0523a61fd869b8c
User & Date:	rolf 2019-05-21 16:21:31

Context

2019-05-21
22:24		Added optional flag argument to domunique. Currently only flag controls, if empty field node sets are ignored (or seen as the empty string). Closed-Leaf check-in: 6a51d9897b user: rolf tags: domlocalkey
16:21		Adding DOM tree postvalidation (only) local key constraints along the lines of xsd unqiue with selector and list of fields but with no restrictions on the XPath expressions (other then resulting a node set in case of selector and a result set with one node in case of field XPath expression). check-in: f645e5dfe1 user: rolf tags: domlocalkey
2019-05-14
20:02		Enhanced the text constraint commands id/idref: Beside the one doc wide ID space there are now additional other named doc wide ID/IDREF spaces possible. Each of them work along the unnamed doc wide ID space. check-in: 6b550b98f8 user: rolf tags: schema

Changes

Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to generic/dom.c.

/*---------------------------------------------------------------------------
|   Includes
|
\--------------------------------------------------------------------------*/
#include <tcl.h>
#include <dom.h>
#include <domxpath.h>

#include <tclexpat.h>


/* #define DEBUG */
/*----------------------------------------------------------------------------
|   Debug Macros
|

/*---------------------------------------------------------------------------
|   Includes
|
\--------------------------------------------------------------------------*/
#include <tcl.h>
#include <dom.h>
#include <domxpath.h>
#include <schema.h>
#include <tclexpat.h>


/* #define DEBUG */
/*----------------------------------------------------------------------------
|   Debug Macros
|

Changes to generic/dom.h.

#include <tcl.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <expat.h>
#include <domalloc.h>
#include <schema.h>

/*
 * tDOM provides it's own memory allocator which is optimized for
 * low heap usage. It uses the native Tcl allocator underneath,
 * though, but it is not very MT-friendly. Therefore, you might
 * use the (normal) Tcl allocator with USE_NORMAL_ALLOCATOR
 * defined during compile time. Actually, the symbols name is 
................................................................................

/*--------------------------------------------------------------------------
|   domAddCallback
|
\-------------------------------------------------------------------------*/
typedef int  (*domAddCallback)  (domNode * node, void * clientData);
typedef void (*domFreeCallback) (domNode * node, void * clientData);







/*--------------------------------------------------------------------------
|   Function prototypes
|
\-------------------------------------------------------------------------*/
const char *   domException2String (domException exception);







<







 







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#include <tcl.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <expat.h>
#include <domalloc.h>


/*
 * tDOM provides it's own memory allocator which is optimized for
 * low heap usage. It uses the native Tcl allocator underneath,
 * though, but it is not very MT-friendly. Therefore, you might
 * use the (normal) Tcl allocator with USE_NORMAL_ALLOCATOR
 * defined during compile time. Actually, the symbols name is 
................................................................................

/*--------------------------------------------------------------------------
|   domAddCallback
|
\-------------------------------------------------------------------------*/
typedef int  (*domAddCallback)  (domNode * node, void * clientData);
typedef void (*domFreeCallback) (domNode * node, void * clientData);

/*--------------------------------------------------------------------------
|   Forward declaration
|
\-------------------------------------------------------------------------*/
typedef struct SchemaData_ SchemaData;

/*--------------------------------------------------------------------------
|   Function prototypes
|
\-------------------------------------------------------------------------*/
const char *   domException2String (domException exception);

Changes to generic/domxpath.c.

        rs->nr_nodes  = 0;
    } else 
    if (rs->type == StringResult) {
        if (rs->string) FREE((char*)rs->string);
    }
    rs->type = EmptyResult;
}























void rsPrint ( xpathResultSet *rs ) {
    int i = 0,l;  char tmp[80];
    switch (rs->type) {
        case EmptyResult:
             fprintf(stderr, "empty result \n");
             break;
................................................................................
    CHECK_RC;

    DBG(rsPrint( result );)
    return 0;

} /* xpathEval */






























































/*----------------------------------------------------------------------------
|   xpathMatches
|
\---------------------------------------------------------------------------*/
int xpathMatches (
    ast                 step,
    domNode           * exprContext,







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        rs->nr_nodes  = 0;
    } else 
    if (rs->type == StringResult) {
        if (rs->string) FREE((char*)rs->string);
    }
    rs->type = EmptyResult;
}

void
xpathRSReset (
    xpathResultSet *rs,
    domNode *node
    ) 
{
    if (rs->type == StringResult) FREE(rs->string);
    if (node) {
        if (!rs->nodes) {
            rs->nodes     = (domNode**)MALLOC( INITIAL_SIZE*sizeof(domNode*));
            rs->allocated = INITIAL_SIZE;
        }
        rs->nodes[0] = node;
        rs->nr_nodes = 1;
        rs->type = xNodeSetResult;
    } else {
        rs->nr_nodes = 0;
        if (rs->nodes) rs->type = xNodeSetResult;
        else rs->type = EmptyResult;
    }
}

void rsPrint ( xpathResultSet *rs ) {
    int i = 0,l;  char tmp[80];
    switch (rs->type) {
        case EmptyResult:
             fprintf(stderr, "empty result \n");
             break;
................................................................................
    CHECK_RC;

    DBG(rsPrint( result );)
    return 0;

} /* xpathEval */


int
xpathEvalAst (
    ast             t,
    xpathResultSet *nodeList,
    domNode        *node,
    xpathResultSet *rs,
    char          **errMsg
    )
{
    int i, rc, first = 1, docOrder = 1;
    xpathResultSet savedContext;
    savedContext = *nodeList;

    while (t) {
        DBG (fprintf (stderr, "xpathEvalAst: eval step '%s'\n", 
                      astType2str[t->type]);)
        if (t->type == Pred) {
            *errMsg = "Pred step not expected now!";
            return XPATH_EVAL_ERR;
        }
        if (first) {
            rc = xpathEvalStepAndPredicates (t, nodeList, node,
                                             node, 0, &docOrder,
                                             NULL, rs, errMsg);
            CHECK_RC;
            first = 0;
        } else {
            DBG( fprintf(stderr, "doing location step nodeList->nr_nodes=%d \n",
                                 nodeList->nr_nodes);
            )
            if (rs->type != xNodeSetResult) {
                *nodeList = savedContext;
                return 0;
            }

            *nodeList = *rs;
            xpathRSReset (rs, NULL);
            for (i=0; i < nodeList->nr_nodes; i++) {
                rc = xpathEvalStepAndPredicates (t, nodeList,
                                                 nodeList->nodes[i],
                                                 node, i, &docOrder, NULL,
                                                 rs, errMsg);
                if (rc) {
                    *nodeList = savedContext;
                    return rc;
                }
            }
        }
        DBG( fprintf(stderr, "result after location step: \n"); )
        DBG( rsPrint( result); )

        t = t->next;
        /* skip the already processed Predicate parts */
        while (t && t->type == Pred) t = t->next;
        docOrder = 1;
    }
    *nodeList = savedContext;
    return 0;
}

/*----------------------------------------------------------------------------
|   xpathMatches
|
\---------------------------------------------------------------------------*/
int xpathMatches (
    ast                 step,
    domNode           * exprContext,

Changes to generic/domxpath.h.

                     ast *t, char **errMsg);
void   xpathFreeAst (ast t);
double xpathGetPrio (ast t);
int    xpathEval    (domNode *node, domNode *exprContext, char *xpath, 
                     char **prefixMappings, xpathCBs *cbs,
                     xpathParseVarCB *parseVarCB, Tcl_HashTable *catch, 
                     char **errMsg, xpathResultSet *rs);


int    xpathMatches (ast steps, domNode * exprContext, domNode *nodeToMatch,
                     xpathCBs *cbs, char **errMsg 
                    );
                     
int xpathEvalSteps (ast steps, xpathResultSet *nodeList,
                    domNode *currentNode, domNode *exprContext, int currentPos,
                    int *docOrder,
                    xpathCBs *cbs,
                    xpathResultSet *result, char **errMsg);
                    
#define xpathRSInit(x) (x)->type = EmptyResult; \
                       (x)->intvalue = 0; \
                       (x)->nr_nodes = 0;
void   xpathRSFree (xpathResultSet *rs );


int    xpathFuncBoolean  (xpathResultSet *rs);
double xpathFuncNumber   (xpathResultSet *rs, int *NaN);
char * xpathFuncString   (xpathResultSet *rs); 
char * xpathFuncStringForNode (domNode *node);
int    xpathRound        (double r);

                     ast *t, char **errMsg);
void   xpathFreeAst (ast t);
double xpathGetPrio (ast t);
int    xpathEval    (domNode *node, domNode *exprContext, char *xpath, 
                     char **prefixMappings, xpathCBs *cbs,
                     xpathParseVarCB *parseVarCB, Tcl_HashTable *catch, 
                     char **errMsg, xpathResultSet *rs);
int    xpathEvalAst (ast t, xpathResultSet *nodeList, domNode *node,
                     xpathResultSet *rs, char **errMsg);
int    xpathMatches (ast steps, domNode * exprContext, domNode *nodeToMatch,
                     xpathCBs *cbs, char **errMsg 
                    );
                     
int xpathEvalSteps (ast steps, xpathResultSet *nodeList,
                    domNode *currentNode, domNode *exprContext, int currentPos,
                    int *docOrder,
                    xpathCBs *cbs,
                    xpathResultSet *result, char **errMsg);
                    
#define xpathRSInit(x) (x)->type = EmptyResult; \
                       (x)->intvalue = 0; \
                       (x)->nr_nodes = 0;
void   xpathRSFree (xpathResultSet *rs);
void   xpathRSReset (xpathResultSet *rs, domNode *ode);

int    xpathFuncBoolean  (xpathResultSet *rs);
double xpathFuncNumber   (xpathResultSet *rs, int *NaN);
char * xpathFuncString   (xpathResultSet *rs); 
char * xpathFuncStringForNode (domNode *node);
int    xpathRound        (double r);

Changes to generic/schema.c.

|
\---------------------------------------------------------------------------*/

#ifndef TDOM_NO_SCHEMA

#include <tdom.h>
#include <tcldom.h>

#include <schema.h>

/* #define DEBUG */
/* #define DDEBUG */
/*----------------------------------------------------------------------------
|   Debug Macros
|
................................................................................
        se = se->down;
    }
    fprintf (stderr, "++++ Stack bottom\n");
}
)

/* DBG end */





















static void freeSchemaCP (
    SchemaCP *pattern
    )
{
    int i;
    SchemaConstraint *sc;
................................................................................
        FREE (pattern->quants);
        if (pattern->attrs) {
            for (i = 0; i < pattern->numAttr; i++) {
                FREE (pattern->attrs[i]);
            }
            FREE (pattern->attrs);
        }

        break;
    }
    FREE (pattern);
}

static SchemaData*
initSchemaData (
................................................................................
    }
    XML_ParserFree (parser);
    Tcl_DStringFree (&cdata);
    FREE (vdata.uri);
    while (sdata->stack) popStack (sdata);
    return result;
}
























































































































































































































static int
validateDOM (
    Tcl_Interp *interp,
    SchemaData *sdata,
    domNode    *node
    )
................................................................................
            /* probeDomAttributes fills interp result with a msg which
             * required attributes are missing. */
            probeDomAttributes (interp, sdata, NULL);
            return TCL_ERROR;
        }
    }






    node = node->firstChild;
    while (node) {
        switch (node->nodeType) {
        case ELEMENT_NODE:
            if (Tcl_DStringLength (sdata->cdata)) {
                if (probeText (interp, sdata,
                               Tcl_DStringValue (sdata->cdata)) != TCL_OK)
................................................................................
        pattern->content[i-1] = (SchemaCP *) objv[i];
        Tcl_IncrRefCount (objv[i]);
    }
    pattern->nc = objc;
    addToContent (sdata, pattern, SCHEMA_CQUANT_ONE, 0, 0);
    return TCL_OK;
}





































































static int
integerImpl (
    Tcl_Interp *interp,
    void *constraintData,
    char *text
    )
................................................................................
                          NamespacePatternObjCmd, NULL, NULL);
    Tcl_CreateObjCommand (interp, "tdom::schema::text",
                          TextPatternObjCmd, NULL, NULL);

    /* The 'virtual' "tcl" definition command */
    Tcl_CreateObjCommand (interp, "tdom::schema::tcl",
                          VirtualPatternObjCmd, NULL, NULL);




    
    /* The text constraint commands */
    Tcl_CreateObjCommand (interp,"tdom::schema::text::integer",
                          integerTCObjCmd, NULL, NULL);
    Tcl_CreateObjCommand (interp, "tdom::schema::text::tcl",
                          tclTCObjCmd, NULL, NULL);
    Tcl_CreateObjCommand (interp, "tdom::schema::text::fixed",







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|
\---------------------------------------------------------------------------*/

#ifndef TDOM_NO_SCHEMA

#include <tdom.h>
#include <tcldom.h>
#include <domxpath.h>
#include <schema.h>

/* #define DEBUG */
/* #define DDEBUG */
/*----------------------------------------------------------------------------
|   Debug Macros
|
................................................................................
        se = se->down;
    }
    fprintf (stderr, "++++ Stack bottom\n");
}
)

/* DBG end */

static void freedomKeyConstraints (
    domKeyConstraint *kc
    )
{
    domKeyConstraint *knext;
    int i;

    while (kc) {
        knext = kc->next;
        if (kc->name) FREE (kc->name);
        xpathFreeAst (kc->selector);
        for (i = 0; i < kc->nrFields; i++) {
            xpathFreeAst (kc->fields[i]);
        }
        FREE (kc->fields);
        FREE (kc);
        kc = knext;
    }
}

static void freeSchemaCP (
    SchemaCP *pattern
    )
{
    int i;
    SchemaConstraint *sc;
................................................................................
        FREE (pattern->quants);
        if (pattern->attrs) {
            for (i = 0; i < pattern->numAttr; i++) {
                FREE (pattern->attrs[i]);
            }
            FREE (pattern->attrs);
        }
        freedomKeyConstraints (pattern->domKeys);
        break;
    }
    FREE (pattern);
}

static SchemaData*
initSchemaData (
................................................................................
    }
    XML_ParserFree (parser);
    Tcl_DStringFree (&cdata);
    FREE (vdata.uri);
    while (sdata->stack) popStack (sdata);
    return result;
}

static void
schemaxpathRSFree (
    xpathResultSet *rs
    )
{
    if (rs->type == StringResult) FREE (rs->string);
    FREE (rs->nodes);
}

static int
checkdomKeyConstraints (
    Tcl_Interp *interp,
    SchemaData *sdata,
    domNode    *node
    )
{
    xpathResultSet nodeList, rs, frs;
    domKeyConstraint *kc;
    domNode *n;
    domAttrNode *attr;
    int rc, i, j, hnew, len, skip, first;
    char *errMsg = NULL, *keystr;
    Tcl_HashTable htable;
    Tcl_DString dStr;

    kc = sdata->stack->pattern->domKeys;
    memset (&nodeList, 0, sizeof (xpathResultSet));
    nodeList.type = EmptyResult;
    memset (&rs, 0, sizeof (xpathResultSet));
    rs.type = EmptyResult;
    memset (&frs, 0, sizeof (xpathResultSet));
    frs.type = EmptyResult;
    Tcl_DStringInit (&dStr);
    while (kc) {
        xpathRSReset (&rs, NULL);
        xpathRSReset (&nodeList, node);
        Tcl_InitHashTable (&htable, TCL_STRING_KEYS);
        rc = xpathEvalAst (kc->selector, &nodeList, node, &rs, &errMsg);
        if (rc) {
            if (recover (interp, sdata, S("INVALID_DOM_KEYCONSTRAINT"))) {
                goto nextConstraint;
            }
            goto errorCleanup;
        }
        if (rs.type == EmptyResult) goto nextConstraint;
        if (rs.type != xNodeSetResult) {
            if (recover (interp, sdata, S("INVALID_DOM_KEYCONSTRAINT"))) {
                goto nextConstraint;
            }
            SetResult ("INVALID_DOM_KEYCONSTRAINT");
            goto errorCleanup;
        }
        for (i = 0; i < rs.nr_nodes; i++) {
            n = rs.nodes[i];
            if (n->nodeType != ELEMENT_NODE) {
                if (recover (interp, sdata, S("INVALID_DOM_KEYCONSTRAINT"))) {
                    break;
                }
                SetResult ("INVALID_DOM_KEYCONSTRAINT");
                goto errorCleanup;
            }
            xpathRSReset (&nodeList, n);
            if (kc->nrFields == 1) {
                xpathRSReset (&frs, NULL);
                rc = xpathEvalAst (kc->fields[0], &nodeList, n, &frs,
                                   &errMsg);
                if (rc) {
                    if (recover (interp, sdata, S("INVALID_DOM_KEYCONSTRAINT"))) {
                        break;
                    }
                    SetResult ("INVALID_DOM_KEYCONSTRAINT");
                    goto errorCleanup;
                }
                if (frs.type != xNodeSetResult
                    && frs.type != EmptyResult) {
                    if (recover (interp, sdata, S("INVALID_DOM_KEYCONSTRAINT"))) {
                        break;
                    }
                    SetResult ("INVALID_DOM_KEYCONSTRAINT");
                    goto errorCleanup;
                }
                if (frs.type == EmptyResult || frs.nr_nodes == 0) {
                    Tcl_CreateHashEntry (&htable, "", &hnew);
                    if (!hnew) {
                        if (recover (interp, sdata, S("DOM_KEYCONSTRAINT"))) {
                            break;
                        }
                        SetResult ("DOM_KEYCONSTRAINT");
                        goto errorCleanup;
                    }
                    continue;
                }
                if (frs.nr_nodes != 1) {
                    if (recover (interp, sdata, S("DOM_KEYCONSTRAINT"))) {
                        break;
                    }
                    SetResult ("DOM_KEYCONSTRAINT");
                    goto errorCleanup;
                }
                if (frs.nodes[0]->nodeType != ELEMENT_NODE
                    && frs.nodes[0]->nodeType != ATTRIBUTE_NODE) {
                    if (recover (interp, sdata, S("INVALID_DOM_KEYCONSTRAINT"))) {
                        break;
                    }
                    SetResult ("INVALID_DOM_KEYCONSTRAINT");
                    goto errorCleanup;
                }
                if (frs.nodes[0]->nodeType == ATTRIBUTE_NODE) {
                    attr = (domAttrNode *) frs.nodes[0];
                    Tcl_CreateHashEntry (&htable, attr->nodeValue, &hnew);
                    if (!hnew) {
                        if (recover (interp, sdata, S("DOM_KEYCONSTRAINT"))) {
                            break;
                        }
                        SetResult ("DOM_KEYCONSTRAINT");
                        goto errorCleanup;
                    }
                } else {
                    keystr = xpathGetStringValue (frs.nodes[0], &len);
                    Tcl_CreateHashEntry (&htable, attr->nodeValue, &hnew);
                    FREE(keystr);
                    if (!hnew) {
                        if (recover (interp, sdata, S("DOM_KEYCONSTRAINT"))) {
                            break;
                        }
                        SetResult ("DOM_KEYCONSTRAINT");
                        goto errorCleanup;
                    }
                }
            } else {
                Tcl_DStringSetLength (&dStr, 0);
                skip = 1;
                first = 0;
                for (j = 0; j < kc->nrFields; j++) {
                    xpathRSReset (&frs, NULL);
                    rc = xpathEvalAst (kc->fields[j], &nodeList, n, &frs,
                                       &errMsg);
                    if (rc) {
                        if (recover (interp, sdata, S("INVALID_DOM_KEYCONSTRAINT"))) {
                            skip = 1;
                            break;
                        }
                        SetResult ("INVALID_DOM_KEYCONSTRAINT");
                        goto errorCleanup;
                    }
                    if (frs.type != xNodeSetResult
                        && frs.type != EmptyResult) {
                        if (recover (interp, sdata, S("INVALID_DOM_KEYCONSTRAINT"))) {
                            skip = 1;
                            break;
                        }
                        SetResult ("INVALID_DOM_KEYCONSTRAINT");
                        goto errorCleanup;
                    }
                    if (frs.type == EmptyResult || frs.nr_nodes == 0) {
                        if (first) first = 0;
                        else Tcl_DStringAppend (&dStr, ":", 1);
                        continue;
                    }
                    if (frs.nr_nodes != 1) {
                        if (recover (interp, sdata, S("DOM_KEYCONSTRAINT"))) {
                            skip = 1;
                            break;
                        }
                        SetResult ("DOM_KEYCONSTRAINT");
                        goto errorCleanup;
                    }
                    if (frs.nodes[0]->nodeType != ELEMENT_NODE
                        && frs.nodes[0]->nodeType != ATTRIBUTE_NODE) {
                        if (recover (interp, sdata, S("INVALID_DOM_KEYCONSTRAINT"))) {
                            skip = 1;
                            break;
                        }
                        SetResult ("INVALID_DOM_KEYCONSTRAINT");
                        goto errorCleanup;
                    }
                    if (first) first = 0;
                    else Tcl_DStringAppend (&dStr, ":", 1);
                    if (frs.nodes[0]->nodeType == ATTRIBUTE_NODE) {
                        attr = (domAttrNode *) frs.nodes[0];
                        Tcl_DStringAppend (&dStr, attr->nodeValue,
                                           attr->valueLength);
                    } else {
                        keystr = xpathGetStringValue (frs.nodes[0], &len);
                        Tcl_DStringAppend (&dStr, keystr, len);
                    }
                }
                if (skip) break;
                Tcl_CreateHashEntry (&htable, Tcl_DStringValue (&dStr), &hnew);
                if (!hnew) {
                    if (recover (interp, sdata, S("DOM_KEYCONSTRAINT"))) {
                        break;
                    }
                    SetResult ("DOM_KEYCONSTRAINT");
                    goto errorCleanup;
                }
            }
        }
    nextConstraint:
        Tcl_DeleteHashTable (&htable);
        kc = kc->next;
    }
    schemaxpathRSFree (&frs);
    schemaxpathRSFree (&rs);
    schemaxpathRSFree (&nodeList);
    return TCL_OK;

errorCleanup:
    Tcl_DeleteHashTable (&htable);
    schemaxpathRSFree (&frs);
    schemaxpathRSFree (&rs);
    schemaxpathRSFree (&nodeList);
    return TCL_ERROR;
}

static int
validateDOM (
    Tcl_Interp *interp,
    SchemaData *sdata,
    domNode    *node
    )
................................................................................
            /* probeDomAttributes fills interp result with a msg which
             * required attributes are missing. */
            probeDomAttributes (interp, sdata, NULL);
            return TCL_ERROR;
        }
    }

    if (sdata->stack->pattern->domKeys) {
        if (checkdomKeyConstraints (interp, sdata, node) != TCL_OK)
            return TCL_ERROR;
    }
    
    node = node->firstChild;
    while (node) {
        switch (node->nodeType) {
        case ELEMENT_NODE:
            if (Tcl_DStringLength (sdata->cdata)) {
                if (probeText (interp, sdata,
                               Tcl_DStringValue (sdata->cdata)) != TCL_OK)
................................................................................
        pattern->content[i-1] = (SchemaCP *) objv[i];
        Tcl_IncrRefCount (objv[i]);
    }
    pattern->nc = objc;
    addToContent (sdata, pattern, SCHEMA_CQUANT_ONE, 0, 0);
    return TCL_OK;
}

static int
domuniquePatternCmd (
    ClientData clientData,
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[]
    )
{
    SchemaData *sdata = GETASI;
    ast t;
    char *errMsg = NULL;
    domKeyConstraint *kc;
    int i, nrFields;
    Tcl_Obj *elm;

    CHECK_SI
    CHECK_TOPLEVEL
    checkNrArgs (3,4,"Expected: <selector> <fieldlist> ?<name>?");
    if (sdata->cp->type != SCHEMA_CTYPE_NAME) {
        SetResult ("The domunique schema definition command is only "
                   "allowed as direct child of an element.");
    }
    
    if (xpathParse (Tcl_GetString (objv[1]), NULL, XPATH_EXPR,
                    sdata->prefixns, NULL, &t, &errMsg) < 0) {
        SetResult3 ("Error in selector xpath: '", errMsg, "");
        FREE (errMsg);
        return TCL_ERROR;
    }

    if (Tcl_ListObjLength (interp, objv[2], &nrFields) != TCL_OK) {
        SetResult ("The <fieldlist> argument must be a valid tcl list");
        xpathFreeAst (t);
        return TCL_ERROR;
    }
    if (nrFields == 0) {
        SetResult ("Non empty fieldlist arugment expected.");
        xpathFreeAst (t);
        return TCL_ERROR;
    }
    
    kc = TMALLOC (domKeyConstraint);
    memset (kc, 0, sizeof (domKeyConstraint));
    kc->fields = MALLOC (sizeof (ast) * nrFields);
    memset (kc->fields, 0, sizeof (ast) * nrFields);
    kc->nrFields = nrFields;
    kc->selector = t;
    
    for (i = 0; i < nrFields; i++) {
        Tcl_ListObjIndex (interp, objv[2], i, &elm);
        if (xpathParse (Tcl_GetString (elm), NULL, XPATH_EXPR,
                        sdata->prefixns, NULL, &t, &errMsg) < 0) {
            SetResult3 ("Error in field xpath: '", errMsg, "");
            FREE (errMsg);
            xpathFreeAst (t);
            freedomKeyConstraints (kc);
            return TCL_ERROR;
        }
        kc->fields[i] = t;
    }
    if (objc == 4) {
        kc->name = tdomstrdup (Tcl_GetString (objv[3]));
    }
    kc->next = sdata->cp->domKeys;
    sdata->cp->domKeys = kc;
    return TCL_OK;
}

static int
integerImpl (
    Tcl_Interp *interp,
    void *constraintData,
    char *text
    )
................................................................................
                          NamespacePatternObjCmd, NULL, NULL);
    Tcl_CreateObjCommand (interp, "tdom::schema::text",
                          TextPatternObjCmd, NULL, NULL);

    /* The 'virtual' "tcl" definition command */
    Tcl_CreateObjCommand (interp, "tdom::schema::tcl",
                          VirtualPatternObjCmd, NULL, NULL);

    /* XPath contraints for DOM validation */
    Tcl_CreateObjCommand (interp,"tdom::schema::domunique",
                          domuniquePatternCmd, NULL, NULL);
    
    /* The text constraint commands */
    Tcl_CreateObjCommand (interp,"tdom::schema::text::integer",
                          integerTCObjCmd, NULL, NULL);
    Tcl_CreateObjCommand (interp, "tdom::schema::text::tcl",
                          tclTCObjCmd, NULL, NULL);
    Tcl_CreateObjCommand (interp, "tdom::schema::text::fixed",

Changes to generic/schema.h.

|   Nov, Dec 2018
|
\---------------------------------------------------------------------------*/

#ifndef __SCHEMA_H__
#define __SCHEMA_H__




typedef enum {
  SCHEMA_CTYPE_ANY,
  SCHEMA_CTYPE_NAME,
  SCHEMA_CTYPE_CHOICE,
  SCHEMA_CTYPE_INTERLEAVE,
  SCHEMA_CTYPE_PATTERN,
  SCHEMA_CTYPE_TEXT,
................................................................................
/* The SchemaFlags flags */
#define FORWARD_PATTERN_DEF     1
#define PLACEHOLDER_PATTERN_DEF 2
#define AMBIGUOUS_PATTERN       4
#define LOCAL_DEFINED_ELEMENT   8
#define CONSTRAINT_TEXT_CHILD  16
#define MIXED_CONTENT          32 









typedef struct SchemaCP
{
    Schema_CP_Type    type;
    char             *namespace;
    char             *name;
    struct SchemaCP  *next;
................................................................................
    SchemaFlags       flags;
    struct SchemaCP **content;
    SchemaQuant      *quants;
    unsigned int      nc;
    SchemaAttr      **attrs;
    unsigned int      numAttr;
    unsigned int      numReqAttr;

} SchemaCP;

typedef struct SchemaValidationStack
{
    SchemaCP *pattern;
    struct SchemaValidationStack *next;
    struct SchemaValidationStack *down;
................................................................................

typedef struct 
{
    Tcl_HashTable ids;
    int unknownIDrefs;
} SchemaDocKey;
    
typedef struct 
{
    Tcl_Obj *self;
    char *start;
    char *startNamespace;
    Tcl_HashTable element;
    Tcl_HashTable namespace;
    Tcl_HashEntry *emptyNamespace;

|   Nov, Dec 2018
|
\---------------------------------------------------------------------------*/

#ifndef __SCHEMA_H__
#define __SCHEMA_H__

#include <tcldom.h>
#include <domxpath.h>

typedef enum {
  SCHEMA_CTYPE_ANY,
  SCHEMA_CTYPE_NAME,
  SCHEMA_CTYPE_CHOICE,
  SCHEMA_CTYPE_INTERLEAVE,
  SCHEMA_CTYPE_PATTERN,
  SCHEMA_CTYPE_TEXT,
................................................................................
/* The SchemaFlags flags */
#define FORWARD_PATTERN_DEF     1
#define PLACEHOLDER_PATTERN_DEF 2
#define AMBIGUOUS_PATTERN       4
#define LOCAL_DEFINED_ELEMENT   8
#define CONSTRAINT_TEXT_CHILD  16
#define MIXED_CONTENT          32 

typedef struct domKeyConstraint {
    char  *name;
    ast    selector;
    ast   *fields;
    int    nrFields;
    struct domKeyConstraint *next;
} domKeyConstraint;

typedef struct SchemaCP
{
    Schema_CP_Type    type;
    char             *namespace;
    char             *name;
    struct SchemaCP  *next;
................................................................................
    SchemaFlags       flags;
    struct SchemaCP **content;
    SchemaQuant      *quants;
    unsigned int      nc;
    SchemaAttr      **attrs;
    unsigned int      numAttr;
    unsigned int      numReqAttr;
    domKeyConstraint *domKeys;
} SchemaCP;

typedef struct SchemaValidationStack
{
    SchemaCP *pattern;
    struct SchemaValidationStack *next;
    struct SchemaValidationStack *down;
................................................................................

typedef struct 
{
    Tcl_HashTable ids;
    int unknownIDrefs;
} SchemaDocKey;
    
typedef struct SchemaData_
{
    Tcl_Obj *self;
    char *start;
    char *startNamespace;
    Tcl_HashTable element;
    Tcl_HashTable namespace;
    Tcl_HashEntry *emptyNamespace;

Changes to tests/schema.test.

proc postValidation {g xml} {
    set doc [dom parse $xml]
    set rc [$g domvalidate $doc errMsg]
    $doc delete
    return $rc
}







}








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proc postValidation {g xml} {
    set doc [dom parse $xml]
    set rc [$g domvalidate $doc errMsg]
    $doc delete
    return $rc
}

test schema-20.1 {domunique} {
    set schema {
        prefixns {ns1 http://tdom.org/test}
        defelement doc {
            domunique ${::schema-20.1} @ref
        }
    }
    set result [list]
    foreach ::schema-20.1 {
        a
        ./../a
        /foo
        a/b
        {a | b}
        a|b
        (a|b)
        {a/b/c | b/c/d | c/d/e}
        .//a
        //a
        a/@ref
        a/b/c
        {a//b[1]/c}
        (.//b|a)/c
        ns1:a
        a/.//b/c
        {}
        {    }
        "
                "
    } {
        tdom::schema s
        lappend result [catch {s define $schema} errMsg]
        #puts $errMsg
        s delete
    }
    set result
} {0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1}

test schema-20.2 {domunique} {
    tdom::schema s
    s define {
        defelement doc {
            domunique item @ref
            element item * {
                attribute ref ?
            }
        }
    }
    set result [list]
    foreach xml {
        {<doc><item ref="1"/><item ref="foo"/></doc>}
        {<doc><item ref="1"/><item ref="1"/></doc>}
    } {
        lappend result [postValidation s $xml]
    }
    s delete
    set result
} {1 0}

test schema-20.3 {domunique} {
    tdom::schema s
    s define {
        defelement doc {
            element items * {
                element item * {
                    attribute ref ?
                }
                domunique item @ref
            }
        }
    }
    set result [list]
    foreach xml {
        {<doc><items><item ref="1"/><item ref="foo"/></items></doc>}
        {<doc><items><item ref="1"/><item ref="1"/></items></doc>}
        {<doc><items><item ref="1"/><item ref="foo"/></items><items><item ref="1"/><item ref="foo"/></items></doc>}
        {<doc><items><item ref="1"/><item ref="foo"/></items><items><item ref="1"/><item ref="bar"/></items></doc>}
        {<doc><items><item ref="1"/><item ref="foo"/></items><items><item ref="2"/><item ref="bar"/></items></doc>}
        {<doc><items><item ref="1"/><item ref="foo"/></items><items><item ref="bar"/><item ref="bar"/></items></doc>}
    } {
        lappend result [postValidation s $xml]
    }
    s delete
    set result
} {1 0 1 1 1 0}

test schema-20.4 {domunique} {
    tdom::schema s
    s define {
        defelement doc {
            domunique item {@ref @id}
            element item * {
                attribute ref ?
            }
        }
    }
    set result [list]
    foreach xml {
        {<doc><item ref="1"/><item ref="foo"/></doc>}
        {<doc><item ref="1"/><item ref="1"/></doc>}
        {<doc><item ref="1" id="a"/><item ref="foo" id="a"/></doc>}
        {<doc><item ref="1" id="a"/><item ref="1" id="a"/></doc>}
        {<doc><item ref="1" id="a"/><item ref="1" id="b"/></doc>}
    } {
        lappend result [postValidation s $xml]
    }
    s delete
    set result
} {1 0 1 0 1}


}