schematron.c 47.1 KB
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/*
 * schematron.c : implementation of the Schematron schema validity checking
 *
 * See Copyright for the status of this software.
 *
 * Daniel Veillard <daniel@veillard.com>
 */

/*
 * TODO:
 * + double check the semantic, especially
 *        - multiple rules applying in a single pattern/node
 *        - the semantic of libxml2 patterns vs. XSLT production referenced
 *          by the spec.
 * + export of results in SVRL
 * + full parsing and coverage of the spec, conformance of the input to the
 *   spec
 * + divergences between the draft and the ISO proposed standard :-(
 * + hook and test include
 * + try and compare with the XSLT version
 */

#define IN_LIBXML
#include "libxml.h"

#ifdef LIBXML_SCHEMATRON_ENABLED

#include <string.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/uri.h>
#include <libxml/xpath.h>
#include <libxml/xpathInternals.h>
#include <libxml/pattern.h>
#include <libxml/schematron.h>

#define SCHEMATRON_PARSE_OPTIONS XML_PARSE_NOENT

#define SCT_OLD_NS BAD_CAST "http://www.ascc.net/xml/schematron"

#define XML_SCHEMATRON_NS BAD_CAST "http://purl.oclc.org/dsdl/schematron"


static const xmlChar *xmlSchematronNs = XML_SCHEMATRON_NS;
static const xmlChar *xmlOldSchematronNs = SCT_OLD_NS;

#define IS_SCHEMATRON(node, elem)					\
   ((node != NULL) && (node->type == XML_ELEMENT_NODE ) &&		\
    (node->ns != NULL) &&						\
    (xmlStrEqual(node->name, (const xmlChar *) elem)) &&		\
    ((xmlStrEqual(node->ns->href, xmlSchematronNs)) ||			\
     (xmlStrEqual(node->ns->href, xmlOldSchematronNs))))

#define NEXT_SCHEMATRON(node)						\
   while (node != NULL) {						\
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       if ((node->type == XML_ELEMENT_NODE ) && (node->ns != NULL) &&	\
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           ((xmlStrEqual(node->ns->href, xmlSchematronNs)) ||		\
	    (xmlStrEqual(node->ns->href, xmlOldSchematronNs))))		\
	   break;							\
       node = node->next;						\
   }

/**
 * TODO:
 *
 * macro to flag unimplemented blocks
 */
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#define TODO								\
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    xmlGenericError(xmlGenericErrorContext,				\
	    "Unimplemented block at %s:%d\n",				\
            __FILE__, __LINE__);

typedef enum {
    XML_SCHEMATRON_ASSERT=1,
    XML_SCHEMATRON_REPORT=2
} xmlSchematronTestType;

/**
 * _xmlSchematronTest:
 *
 * A Schematrons test, either an assert or a report
 */
typedef struct _xmlSchematronTest xmlSchematronTest;
typedef xmlSchematronTest *xmlSchematronTestPtr;
struct _xmlSchematronTest {
    xmlSchematronTestPtr next;	/* the next test in the list */
    xmlSchematronTestType type;	/* the test type */
    xmlNodePtr node;		/* the node in the tree */
    xmlChar *test;		/* the expression to test */
    xmlXPathCompExprPtr comp;	/* the compiled expression */
    xmlChar *report;		/* the message to report */
};

/**
 * _xmlSchematronRule:
 *
 * A Schematrons rule
 */
typedef struct _xmlSchematronRule xmlSchematronRule;
typedef xmlSchematronRule *xmlSchematronRulePtr;
struct _xmlSchematronRule {
    xmlSchematronRulePtr next;	/* the next rule in the list */
    xmlSchematronRulePtr patnext;/* the next rule in the pattern list */
    xmlNodePtr node;		/* the node in the tree */
    xmlChar *context;		/* the context evaluation rule */
    xmlSchematronTestPtr tests;	/* the list of tests */
    xmlPatternPtr pattern;	/* the compiled pattern associated */
    xmlChar *report;		/* the message to report */
};

/**
 * _xmlSchematronPattern:
 *
 * A Schematrons pattern
 */
typedef struct _xmlSchematronPattern xmlSchematronPattern;
typedef xmlSchematronPattern *xmlSchematronPatternPtr;
struct _xmlSchematronPattern {
    xmlSchematronPatternPtr next;/* the next pattern in the list */
    xmlSchematronRulePtr rules;	/* the list of rules */
    xmlChar *name;		/* the name of the pattern */
};

/**
 * _xmlSchematron:
 *
 * A Schematrons definition
 */
struct _xmlSchematron {
    const xmlChar *name;	/* schema name */
    int preserve;		/* was the document passed by the user */
    xmlDocPtr doc;		/* pointer to the parsed document */
    int flags;			/* specific to this schematron */

    void *_private;		/* unused by the library */
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    xmlDictPtr dict;		/* the dictionary used internally */
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    const xmlChar *title;	/* the title if any */

    int nbNs;			/* the number of namespaces */

    int nbPattern;		/* the number of patterns */
    xmlSchematronPatternPtr patterns;/* the patterns found */
    xmlSchematronRulePtr rules;	/* the rules gathered */
    int nbNamespaces;		/* number of namespaces in the array */
    int maxNamespaces;		/* size of the array */
    const xmlChar **namespaces;	/* the array of namespaces */
};

/**
 * xmlSchematronValidCtxt:
 *
 * A Schematrons validation context
 */
struct _xmlSchematronValidCtxt {
    int type;
    int flags;			/* an or of xmlSchematronValidOptions */

    xmlDictPtr dict;
    int nberrors;
    int err;

    xmlSchematronPtr schema;
    xmlXPathContextPtr xctxt;

    FILE *outputFile;		/* if using XML_SCHEMATRON_OUT_FILE */
    xmlBufferPtr outputBuffer;	/* if using XML_SCHEMATRON_OUT_BUFFER */
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#ifdef LIBXML_OUTPUT_ENABLED
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    xmlOutputWriteCallback iowrite; /* if using XML_SCHEMATRON_OUT_IO */
    xmlOutputCloseCallback  ioclose;
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#endif
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    void *ioctx;
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    /* error reporting data */
    void *userData;                      /* user specific data block */
    xmlSchematronValidityErrorFunc error;/* the callback in case of errors */
    xmlSchematronValidityWarningFunc warning;/* callback in case of warning */
    xmlStructuredErrorFunc serror;       /* the structured function */
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};

struct _xmlSchematronParserCtxt {
    int type;
    const xmlChar *URL;
    xmlDocPtr doc;
    int preserve;               /* Whether the doc should be freed  */
    const char *buffer;
    int size;

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    xmlDictPtr dict;            /* dictionary for interned string names */
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    int nberrors;
    int err;
    xmlXPathContextPtr xctxt;	/* the XPath context used for compilation */
    xmlSchematronPtr schema;

    int nbNamespaces;		/* number of namespaces in the array */
    int maxNamespaces;		/* size of the array */
    const xmlChar **namespaces;	/* the array of namespaces */

    int nbIncludes;		/* number of includes in the array */
    int maxIncludes;		/* size of the array */
    xmlNodePtr *includes;	/* the array of includes */

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    /* error reporting data */
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    void *userData;                      /* user specific data block */
    xmlSchematronValidityErrorFunc error;/* the callback in case of errors */
    xmlSchematronValidityWarningFunc warning;/* callback in case of warning */
    xmlStructuredErrorFunc serror;       /* the structured function */
};

#define XML_STRON_CTXT_PARSER 1
#define XML_STRON_CTXT_VALIDATOR 2

/************************************************************************
 *									*
 *			Error reporting					*
 *									*
 ************************************************************************/

/**
 * xmlSchematronPErrMemory:
 * @node: a context node
 * @extra:  extra informations
 *
 * Handle an out of memory condition
 */
static void
xmlSchematronPErrMemory(xmlSchematronParserCtxtPtr ctxt,
                        const char *extra, xmlNodePtr node)
{
    if (ctxt != NULL)
        ctxt->nberrors++;
    __xmlSimpleError(XML_FROM_SCHEMASP, XML_ERR_NO_MEMORY, node, NULL,
                     extra);
}

/**
 * xmlSchematronPErr:
 * @ctxt: the parsing context
 * @node: the context node
 * @error: the error code
 * @msg: the error message
 * @str1: extra data
 * @str2: extra data
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 *
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 * Handle a parser error
 */
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static void LIBXML_ATTR_FORMAT(4,0)
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xmlSchematronPErr(xmlSchematronParserCtxtPtr ctxt, xmlNodePtr node, int error,
              const char *msg, const xmlChar * str1, const xmlChar * str2)
{
    xmlGenericErrorFunc channel = NULL;
    xmlStructuredErrorFunc schannel = NULL;
    void *data = NULL;

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

/**
 * xmlSchematronVTypeErrMemory:
 * @node: a context node
 * @extra:  extra informations
 *
 * Handle an out of memory condition
 */
static void
xmlSchematronVErrMemory(xmlSchematronValidCtxtPtr ctxt,
                        const char *extra, xmlNodePtr node)
{
    if (ctxt != NULL) {
        ctxt->nberrors++;
        ctxt->err = XML_SCHEMAV_INTERNAL;
    }
    __xmlSimpleError(XML_FROM_SCHEMASV, XML_ERR_NO_MEMORY, node, NULL,
                     extra);
}

/************************************************************************
 *									*
 *		Parsing and compilation of the Schematrontrons		*
 *									*
 ************************************************************************/

/**
 * xmlSchematronAddTest:
 * @ctxt: the schema parsing context
 * @type:  the type of test
 * @rule:  the parent rule
 * @node:  the node hosting the test
 * @test: the associated test
 * @report: the associated report string
 *
 * Add a test to a schematron
 *
 * Returns the new pointer or NULL in case of error
 */
static xmlSchematronTestPtr
xmlSchematronAddTest(xmlSchematronParserCtxtPtr ctxt,
                     xmlSchematronTestType type,
                     xmlSchematronRulePtr rule,
                     xmlNodePtr node, xmlChar *test, xmlChar *report)
{
    xmlSchematronTestPtr ret;
    xmlXPathCompExprPtr comp;

    if ((ctxt == NULL) || (rule == NULL) || (node == NULL) ||
        (test == NULL))
        return(NULL);

    /*
     * try first to compile the test expression
     */
    comp = xmlXPathCtxtCompile(ctxt->xctxt, test);
    if (comp == NULL) {
	xmlSchematronPErr(ctxt, node,
	    XML_SCHEMAP_NOROOT,
	    "Failed to compile test expression %s",
	    test, NULL);
	return(NULL);
    }

    ret = (xmlSchematronTestPtr) xmlMalloc(sizeof(xmlSchematronTest));
    if (ret == NULL) {
        xmlSchematronPErrMemory(ctxt, "allocating schema test", node);
        return (NULL);
    }
    memset(ret, 0, sizeof(xmlSchematronTest));
    ret->type = type;
    ret->node = node;
    ret->test = test;
    ret->comp = comp;
    ret->report = report;
    ret->next = NULL;
    if (rule->tests == NULL) {
	rule->tests = ret;
    } else {
        xmlSchematronTestPtr prev = rule->tests;

	while (prev->next != NULL)
	     prev = prev->next;
        prev->next = ret;
    }
    return (ret);
}

/**
 * xmlSchematronFreeTests:
 * @tests:  a list of tests
 *
 * Free a list of tests.
 */
static void
xmlSchematronFreeTests(xmlSchematronTestPtr tests) {
    xmlSchematronTestPtr next;

    while (tests != NULL) {
        next = tests->next;
	if (tests->test != NULL)
	    xmlFree(tests->test);
	if (tests->comp != NULL)
	    xmlXPathFreeCompExpr(tests->comp);
	if (tests->report != NULL)
	    xmlFree(tests->report);
	xmlFree(tests);
	tests = next;
    }
}

/**
 * xmlSchematronAddRule:
 * @ctxt: the schema parsing context
 * @schema:  a schema structure
 * @node:  the node hosting the rule
 * @context: the associated context string
 * @report: the associated report string
 *
 * Add a rule to a schematron
 *
 * Returns the new pointer or NULL in case of error
 */
static xmlSchematronRulePtr
xmlSchematronAddRule(xmlSchematronParserCtxtPtr ctxt, xmlSchematronPtr schema,
                     xmlSchematronPatternPtr pat, xmlNodePtr node,
		     xmlChar *context, xmlChar *report)
{
    xmlSchematronRulePtr ret;
    xmlPatternPtr pattern;

    if ((ctxt == NULL) || (schema == NULL) || (node == NULL) ||
        (context == NULL))
        return(NULL);

    /*
     * Try first to compile the pattern
     */
    pattern = xmlPatterncompile(context, ctxt->dict, XML_PATTERN_XPATH,
                                ctxt->namespaces);
    if (pattern == NULL) {
	xmlSchematronPErr(ctxt, node,
	    XML_SCHEMAP_NOROOT,
	    "Failed to compile context expression %s",
	    context, NULL);
    }

    ret = (xmlSchematronRulePtr) xmlMalloc(sizeof(xmlSchematronRule));
    if (ret == NULL) {
        xmlSchematronPErrMemory(ctxt, "allocating schema rule", node);
        return (NULL);
    }
    memset(ret, 0, sizeof(xmlSchematronRule));
    ret->node = node;
    ret->context = context;
    ret->pattern = pattern;
    ret->report = report;
    ret->next = NULL;
    if (schema->rules == NULL) {
	schema->rules = ret;
    } else {
        xmlSchematronRulePtr prev = schema->rules;

	while (prev->next != NULL)
	     prev = prev->next;
        prev->next = ret;
    }
    ret->patnext = NULL;
    if (pat->rules == NULL) {
	pat->rules = ret;
    } else {
        xmlSchematronRulePtr prev = pat->rules;

	while (prev->patnext != NULL)
	     prev = prev->patnext;
        prev->patnext = ret;
    }
    return (ret);
}

/**
 * xmlSchematronFreeRules:
 * @rules:  a list of rules
 *
 * Free a list of rules.
 */
static void
xmlSchematronFreeRules(xmlSchematronRulePtr rules) {
    xmlSchematronRulePtr next;

    while (rules != NULL) {
        next = rules->next;
	if (rules->tests)
	    xmlSchematronFreeTests(rules->tests);
	if (rules->context != NULL)
	    xmlFree(rules->context);
	if (rules->pattern)
	    xmlFreePattern(rules->pattern);
	if (rules->report != NULL)
	    xmlFree(rules->report);
	xmlFree(rules);
	rules = next;
    }
}

/**
 * xmlSchematronAddPattern:
 * @ctxt: the schema parsing context
 * @schema:  a schema structure
 * @node:  the node hosting the pattern
 * @id: the id or name of the pattern
 *
 * Add a pattern to a schematron
 *
 * Returns the new pointer or NULL in case of error
 */
static xmlSchematronPatternPtr
xmlSchematronAddPattern(xmlSchematronParserCtxtPtr ctxt,
                     xmlSchematronPtr schema, xmlNodePtr node, xmlChar *name)
{
    xmlSchematronPatternPtr ret;

    if ((ctxt == NULL) || (schema == NULL) || (node == NULL) || (name == NULL))
        return(NULL);

    ret = (xmlSchematronPatternPtr) xmlMalloc(sizeof(xmlSchematronPattern));
    if (ret == NULL) {
        xmlSchematronPErrMemory(ctxt, "allocating schema pattern", node);
        return (NULL);
    }
    memset(ret, 0, sizeof(xmlSchematronPattern));
    ret->name = name;
    ret->next = NULL;
    if (schema->patterns == NULL) {
	schema->patterns = ret;
    } else {
        xmlSchematronPatternPtr prev = schema->patterns;

	while (prev->next != NULL)
	     prev = prev->next;
        prev->next = ret;
    }
    return (ret);
}

/**
 * xmlSchematronFreePatterns:
 * @patterns:  a list of patterns
 *
 * Free a list of patterns.
 */
static void
xmlSchematronFreePatterns(xmlSchematronPatternPtr patterns) {
    xmlSchematronPatternPtr next;

    while (patterns != NULL) {
        next = patterns->next;
	if (patterns->name != NULL)
	    xmlFree(patterns->name);
	xmlFree(patterns);
	patterns = next;
    }
}

/**
 * xmlSchematronNewSchematron:
 * @ctxt:  a schema validation context
 *
 * Allocate a new Schematron structure.
 *
 * Returns the newly allocated structure or NULL in case or error
 */
static xmlSchematronPtr
xmlSchematronNewSchematron(xmlSchematronParserCtxtPtr ctxt)
{
    xmlSchematronPtr ret;

    ret = (xmlSchematronPtr) xmlMalloc(sizeof(xmlSchematron));
    if (ret == NULL) {
        xmlSchematronPErrMemory(ctxt, "allocating schema", NULL);
        return (NULL);
    }
    memset(ret, 0, sizeof(xmlSchematron));
    ret->dict = ctxt->dict;
    xmlDictReference(ret->dict);

    return (ret);
}

/**
 * xmlSchematronFree:
 * @schema:  a schema structure
 *
 * Deallocate a Schematron structure.
 */
void
xmlSchematronFree(xmlSchematronPtr schema)
{
    if (schema == NULL)
        return;

    if ((schema->doc != NULL) && (!(schema->preserve)))
        xmlFreeDoc(schema->doc);

    if (schema->namespaces != NULL)
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        xmlFree((char **) schema->namespaces);
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    xmlSchematronFreeRules(schema->rules);
    xmlSchematronFreePatterns(schema->patterns);
    xmlDictFree(schema->dict);
    xmlFree(schema);
}

/**
 * xmlSchematronNewParserCtxt:
 * @URL:  the location of the schema
 *
 * Create an XML Schematrons parse context for that file/resource expected
 * to contain an XML Schematrons file.
 *
 * Returns the parser context or NULL in case of error
 */
xmlSchematronParserCtxtPtr
xmlSchematronNewParserCtxt(const char *URL)
{
    xmlSchematronParserCtxtPtr ret;

    if (URL == NULL)
        return (NULL);

    ret =
        (xmlSchematronParserCtxtPtr)
        xmlMalloc(sizeof(xmlSchematronParserCtxt));
    if (ret == NULL) {
        xmlSchematronPErrMemory(NULL, "allocating schema parser context",
                                NULL);
        return (NULL);
    }
    memset(ret, 0, sizeof(xmlSchematronParserCtxt));
    ret->type = XML_STRON_CTXT_PARSER;
    ret->dict = xmlDictCreate();
    ret->URL = xmlDictLookup(ret->dict, (const xmlChar *) URL, -1);
    ret->includes = NULL;
    ret->xctxt = xmlXPathNewContext(NULL);
    if (ret->xctxt == NULL) {
        xmlSchematronPErrMemory(NULL, "allocating schema parser XPath context",
                                NULL);
	xmlSchematronFreeParserCtxt(ret);
        return (NULL);
    }
    ret->xctxt->flags = XML_XPATH_CHECKNS;
    return (ret);
}

/**
 * xmlSchematronNewMemParserCtxt:
 * @buffer:  a pointer to a char array containing the schemas
 * @size:  the size of the array
 *
 * Create an XML Schematrons parse context for that memory buffer expected
 * to contain an XML Schematrons file.
 *
 * Returns the parser context or NULL in case of error
 */
xmlSchematronParserCtxtPtr
xmlSchematronNewMemParserCtxt(const char *buffer, int size)
{
    xmlSchematronParserCtxtPtr ret;

    if ((buffer == NULL) || (size <= 0))
        return (NULL);

    ret =
        (xmlSchematronParserCtxtPtr)
        xmlMalloc(sizeof(xmlSchematronParserCtxt));
    if (ret == NULL) {
        xmlSchematronPErrMemory(NULL, "allocating schema parser context",
                                NULL);
        return (NULL);
    }
    memset(ret, 0, sizeof(xmlSchematronParserCtxt));
    ret->buffer = buffer;
    ret->size = size;
    ret->dict = xmlDictCreate();
    ret->xctxt = xmlXPathNewContext(NULL);
    if (ret->xctxt == NULL) {
        xmlSchematronPErrMemory(NULL, "allocating schema parser XPath context",
                                NULL);
	xmlSchematronFreeParserCtxt(ret);
        return (NULL);
    }
    return (ret);
}

/**
 * xmlSchematronNewDocParserCtxt:
 * @doc:  a preparsed document tree
 *
 * Create an XML Schematrons parse context for that document.
 * NB. The document may be modified during the parsing process.
 *
 * Returns the parser context or NULL in case of error
 */
xmlSchematronParserCtxtPtr
xmlSchematronNewDocParserCtxt(xmlDocPtr doc)
{
    xmlSchematronParserCtxtPtr ret;

    if (doc == NULL)
        return (NULL);

    ret =
        (xmlSchematronParserCtxtPtr)
        xmlMalloc(sizeof(xmlSchematronParserCtxt));
    if (ret == NULL) {
        xmlSchematronPErrMemory(NULL, "allocating schema parser context",
                                NULL);
        return (NULL);
    }
    memset(ret, 0, sizeof(xmlSchematronParserCtxt));
    ret->doc = doc;
    ret->dict = xmlDictCreate();
    /* The application has responsibility for the document */
    ret->preserve = 1;
    ret->xctxt = xmlXPathNewContext(doc);
    if (ret->xctxt == NULL) {
        xmlSchematronPErrMemory(NULL, "allocating schema parser XPath context",
                                NULL);
	xmlSchematronFreeParserCtxt(ret);
        return (NULL);
    }

    return (ret);
}

/**
 * xmlSchematronFreeParserCtxt:
 * @ctxt:  the schema parser context
 *
 * Free the resources associated to the schema parser context
 */
void
xmlSchematronFreeParserCtxt(xmlSchematronParserCtxtPtr ctxt)
{
    if (ctxt == NULL)
        return;
    if (ctxt->doc != NULL && !ctxt->preserve)
        xmlFreeDoc(ctxt->doc);
    if (ctxt->xctxt != NULL) {
        xmlXPathFreeContext(ctxt->xctxt);
    }
    if (ctxt->namespaces != NULL)
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        xmlFree((char **) ctxt->namespaces);
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    xmlDictFree(ctxt->dict);
    xmlFree(ctxt);
}

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#if 0
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/**
 * xmlSchematronPushInclude:
 * @ctxt:  the schema parser context
 * @doc:  the included document
 * @cur:  the current include node
 *
 * Add an included document
 */
static void
xmlSchematronPushInclude(xmlSchematronParserCtxtPtr ctxt,
                        xmlDocPtr doc, xmlNodePtr cur)
{
    if (ctxt->includes == NULL) {
        ctxt->maxIncludes = 10;
        ctxt->includes = (xmlNodePtr *)
	    xmlMalloc(ctxt->maxIncludes * 2 * sizeof(xmlNodePtr));
	if (ctxt->includes == NULL) {
	    xmlSchematronPErrMemory(NULL, "allocating parser includes",
				    NULL);
	    return;
	}
        ctxt->nbIncludes = 0;
    } else if (ctxt->nbIncludes + 2 >= ctxt->maxIncludes) {
        xmlNodePtr *tmp;

	tmp = (xmlNodePtr *)
	    xmlRealloc(ctxt->includes, ctxt->maxIncludes * 4 *
	               sizeof(xmlNodePtr));
	if (tmp == NULL) {
	    xmlSchematronPErrMemory(NULL, "allocating parser includes",
				    NULL);
	    return;
	}
        ctxt->includes = tmp;
	ctxt->maxIncludes *= 2;
    }
    ctxt->includes[2 * ctxt->nbIncludes] = cur;
    ctxt->includes[2 * ctxt->nbIncludes + 1] = (xmlNodePtr) doc;
    ctxt->nbIncludes++;
}

/**
 * xmlSchematronPopInclude:
 * @ctxt:  the schema parser context
 *
 * Pop an include level. The included document is being freed
 *
 * Returns the node immediately following the include or NULL if the
 *         include list was empty.
 */
static xmlNodePtr
xmlSchematronPopInclude(xmlSchematronParserCtxtPtr ctxt)
{
    xmlDocPtr doc;
    xmlNodePtr ret;

    if (ctxt->nbIncludes <= 0)
        return(NULL);
    ctxt->nbIncludes--;
    doc = (xmlDocPtr) ctxt->includes[2 * ctxt->nbIncludes + 1];
    ret = ctxt->includes[2 * ctxt->nbIncludes];
    xmlFreeDoc(doc);
    if (ret != NULL)
	ret = ret->next;
    if (ret == NULL)
        return(xmlSchematronPopInclude(ctxt));
    return(ret);
}
793
#endif
794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820

/**
 * xmlSchematronAddNamespace:
 * @ctxt:  the schema parser context
 * @prefix:  the namespace prefix
 * @ns:  the namespace name
 *
 * Add a namespace definition in the context
 */
static void
xmlSchematronAddNamespace(xmlSchematronParserCtxtPtr ctxt,
                          const xmlChar *prefix, const xmlChar *ns)
{
    if (ctxt->namespaces == NULL) {
        ctxt->maxNamespaces = 10;
        ctxt->namespaces = (const xmlChar **)
	    xmlMalloc(ctxt->maxNamespaces * 2 * sizeof(const xmlChar *));
	if (ctxt->namespaces == NULL) {
	    xmlSchematronPErrMemory(NULL, "allocating parser namespaces",
				    NULL);
	    return;
	}
        ctxt->nbNamespaces = 0;
    } else if (ctxt->nbNamespaces + 2 >= ctxt->maxNamespaces) {
        const xmlChar **tmp;

	tmp = (const xmlChar **)
821
	    xmlRealloc((xmlChar **) ctxt->namespaces, ctxt->maxNamespaces * 4 *
822 823 824 825 826 827 828 829 830
	               sizeof(const xmlChar *));
	if (tmp == NULL) {
	    xmlSchematronPErrMemory(NULL, "allocating parser namespaces",
				    NULL);
	    return;
	}
        ctxt->namespaces = tmp;
	ctxt->maxNamespaces *= 2;
    }
831
    ctxt->namespaces[2 * ctxt->nbNamespaces] =
832
        xmlDictLookup(ctxt->dict, ns, -1);
833
    ctxt->namespaces[2 * ctxt->nbNamespaces + 1] =
834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998
        xmlDictLookup(ctxt->dict, prefix, -1);
    ctxt->nbNamespaces++;
    ctxt->namespaces[2 * ctxt->nbNamespaces] = NULL;
    ctxt->namespaces[2 * ctxt->nbNamespaces + 1] = NULL;

}

/**
 * xmlSchematronParseRule:
 * @ctxt:  a schema validation context
 * @rule:  the rule node
 *
 * parse a rule element
 */
static void
xmlSchematronParseRule(xmlSchematronParserCtxtPtr ctxt,
                       xmlSchematronPatternPtr pattern,
		       xmlNodePtr rule)
{
    xmlNodePtr cur;
    int nbChecks = 0;
    xmlChar *test;
    xmlChar *context;
    xmlChar *report;
    xmlSchematronRulePtr ruleptr;
    xmlSchematronTestPtr testptr;

    if ((ctxt == NULL) || (rule == NULL)) return;

    context = xmlGetNoNsProp(rule, BAD_CAST "context");
    if (context == NULL) {
	xmlSchematronPErr(ctxt, rule,
	    XML_SCHEMAP_NOROOT,
	    "rule has no context attribute",
	    NULL, NULL);
	return;
    } else if (context[0] == 0) {
	xmlSchematronPErr(ctxt, rule,
	    XML_SCHEMAP_NOROOT,
	    "rule has an empty context attribute",
	    NULL, NULL);
	xmlFree(context);
	return;
    } else {
	ruleptr = xmlSchematronAddRule(ctxt, ctxt->schema, pattern,
	                               rule, context, NULL);
	if (ruleptr == NULL) {
	    xmlFree(context);
	    return;
	}
    }

    cur = rule->children;
    NEXT_SCHEMATRON(cur);
    while (cur != NULL) {
	if (IS_SCHEMATRON(cur, "assert")) {
	    nbChecks++;
	    test = xmlGetNoNsProp(cur, BAD_CAST "test");
	    if (test == NULL) {
		xmlSchematronPErr(ctxt, cur,
		    XML_SCHEMAP_NOROOT,
		    "assert has no test attribute",
		    NULL, NULL);
	    } else if (test[0] == 0) {
		xmlSchematronPErr(ctxt, cur,
		    XML_SCHEMAP_NOROOT,
		    "assert has an empty test attribute",
		    NULL, NULL);
		xmlFree(test);
	    } else {
		/* TODO will need dynamic processing instead */
		report = xmlNodeGetContent(cur);

		testptr = xmlSchematronAddTest(ctxt, XML_SCHEMATRON_ASSERT,
		                               ruleptr, cur, test, report);
		if (testptr == NULL)
		    xmlFree(test);
	    }
	} else if (IS_SCHEMATRON(cur, "report")) {
	    nbChecks++;
	    test = xmlGetNoNsProp(cur, BAD_CAST "test");
	    if (test == NULL) {
		xmlSchematronPErr(ctxt, cur,
		    XML_SCHEMAP_NOROOT,
		    "assert has no test attribute",
		    NULL, NULL);
	    } else if (test[0] == 0) {
		xmlSchematronPErr(ctxt, cur,
		    XML_SCHEMAP_NOROOT,
		    "assert has an empty test attribute",
		    NULL, NULL);
		xmlFree(test);
	    } else {
		/* TODO will need dynamic processing instead */
		report = xmlNodeGetContent(cur);

		testptr = xmlSchematronAddTest(ctxt, XML_SCHEMATRON_REPORT,
		                               ruleptr, cur, test, report);
		if (testptr == NULL)
		    xmlFree(test);
	    }
	} else {
	    xmlSchematronPErr(ctxt, cur,
		XML_SCHEMAP_NOROOT,
		"Expecting an assert or a report element instead of %s",
		cur->name, NULL);
	}
	cur = cur->next;
	NEXT_SCHEMATRON(cur);
    }
    if (nbChecks == 0) {
	xmlSchematronPErr(ctxt, rule,
	    XML_SCHEMAP_NOROOT,
	    "rule has no assert nor report element", NULL, NULL);
    }
}

/**
 * xmlSchematronParsePattern:
 * @ctxt:  a schema validation context
 * @pat:  the pattern node
 *
 * parse a pattern element
 */
static void
xmlSchematronParsePattern(xmlSchematronParserCtxtPtr ctxt, xmlNodePtr pat)
{
    xmlNodePtr cur;
    xmlSchematronPatternPtr pattern;
    int nbRules = 0;
    xmlChar *id;

    if ((ctxt == NULL) || (pat == NULL)) return;

    id = xmlGetNoNsProp(pat, BAD_CAST "id");
    if (id == NULL) {
	id = xmlGetNoNsProp(pat, BAD_CAST "name");
    }
    pattern = xmlSchematronAddPattern(ctxt, ctxt->schema, pat, id);
    if (pattern == NULL) {
	if (id != NULL)
	    xmlFree(id);
        return;
    }
    cur = pat->children;
    NEXT_SCHEMATRON(cur);
    while (cur != NULL) {
	if (IS_SCHEMATRON(cur, "rule")) {
	    xmlSchematronParseRule(ctxt, pattern, cur);
	    nbRules++;
	} else {
	    xmlSchematronPErr(ctxt, cur,
		XML_SCHEMAP_NOROOT,
		"Expecting a rule element instead of %s", cur->name, NULL);
	}
	cur = cur->next;
	NEXT_SCHEMATRON(cur);
    }
    if (nbRules == 0) {
	xmlSchematronPErr(ctxt, pat,
	    XML_SCHEMAP_NOROOT,
	    "Pattern has no rule element", NULL, NULL);
    }
}

999
#if 0
1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056
/**
 * xmlSchematronLoadInclude:
 * @ctxt:  a schema validation context
 * @cur:  the include element
 *
 * Load the include document, Push the current pointer
 *
 * Returns the updated node pointer
 */
static xmlNodePtr
xmlSchematronLoadInclude(xmlSchematronParserCtxtPtr ctxt, xmlNodePtr cur)
{
    xmlNodePtr ret = NULL;
    xmlDocPtr doc = NULL;
    xmlChar *href = NULL;
    xmlChar *base = NULL;
    xmlChar *URI = NULL;

    if ((ctxt == NULL) || (cur == NULL))
        return(NULL);

    href = xmlGetNoNsProp(cur, BAD_CAST "href");
    if (href == NULL) {
	xmlSchematronPErr(ctxt, cur,
	    XML_SCHEMAP_NOROOT,
	    "Include has no href attribute", NULL, NULL);
	return(cur->next);
    }

    /* do the URI base composition, load and find the root */
    base = xmlNodeGetBase(cur->doc, cur);
    URI = xmlBuildURI(href, base);
    doc = xmlReadFile((const char *) URI, NULL, SCHEMATRON_PARSE_OPTIONS);
    if (doc == NULL) {
	xmlSchematronPErr(ctxt, cur,
		      XML_SCHEMAP_FAILED_LOAD,
		      "could not load include '%s'.\n",
		      URI, NULL);
	goto done;
    }
    ret = xmlDocGetRootElement(doc);
    if (ret == NULL) {
	xmlSchematronPErr(ctxt, cur,
		      XML_SCHEMAP_FAILED_LOAD,
		      "could not find root from include '%s'.\n",
		      URI, NULL);
	goto done;
    }

    /* Success, push the include for rollback on exit */
    xmlSchematronPushInclude(ctxt, doc, cur);

done:
    if (ret == NULL) {
        if (doc != NULL)
	    xmlFreeDoc(doc);
    }
1057 1058
    xmlFree(href);
    if (base != NULL)
1059
        xmlFree(base);
1060
    if (URI != NULL)
1061 1062 1063
        xmlFree(URI);
    return(ret);
}
1064
#endif
1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213

/**
 * xmlSchematronParse:
 * @ctxt:  a schema validation context
 *
 * parse a schema definition resource and build an internal
 * XML Shema struture which can be used to validate instances.
 *
 * Returns the internal XML Schematron structure built from the resource or
 *         NULL in case of error
 */
xmlSchematronPtr
xmlSchematronParse(xmlSchematronParserCtxtPtr ctxt)
{
    xmlSchematronPtr ret = NULL;
    xmlDocPtr doc;
    xmlNodePtr root, cur;
    int preserve = 0;

    if (ctxt == NULL)
        return (NULL);

    ctxt->nberrors = 0;

    /*
     * First step is to parse the input document into an DOM/Infoset
     */
    if (ctxt->URL != NULL) {
        doc = xmlReadFile((const char *) ctxt->URL, NULL,
	                  SCHEMATRON_PARSE_OPTIONS);
        if (doc == NULL) {
	    xmlSchematronPErr(ctxt, NULL,
			  XML_SCHEMAP_FAILED_LOAD,
                          "xmlSchematronParse: could not load '%s'.\n",
                          ctxt->URL, NULL);
            return (NULL);
        }
	ctxt->preserve = 0;
    } else if (ctxt->buffer != NULL) {
        doc = xmlReadMemory(ctxt->buffer, ctxt->size, NULL, NULL,
	                    SCHEMATRON_PARSE_OPTIONS);
        if (doc == NULL) {
	    xmlSchematronPErr(ctxt, NULL,
			  XML_SCHEMAP_FAILED_PARSE,
                          "xmlSchematronParse: could not parse.\n",
                          NULL, NULL);
            return (NULL);
        }
        doc->URL = xmlStrdup(BAD_CAST "in_memory_buffer");
        ctxt->URL = xmlDictLookup(ctxt->dict, BAD_CAST "in_memory_buffer", -1);
	ctxt->preserve = 0;
    } else if (ctxt->doc != NULL) {
        doc = ctxt->doc;
	preserve = 1;
	ctxt->preserve = 1;
    } else {
	xmlSchematronPErr(ctxt, NULL,
		      XML_SCHEMAP_NOTHING_TO_PARSE,
		      "xmlSchematronParse: could not parse.\n",
		      NULL, NULL);
        return (NULL);
    }

    /*
     * Then extract the root and Schematron parse it
     */
    root = xmlDocGetRootElement(doc);
    if (root == NULL) {
	xmlSchematronPErr(ctxt, (xmlNodePtr) doc,
		      XML_SCHEMAP_NOROOT,
		      "The schema has no document element.\n", NULL, NULL);
	if (!preserve) {
	    xmlFreeDoc(doc);
	}
        return (NULL);
    }

    if (!IS_SCHEMATRON(root, "schema")) {
	xmlSchematronPErr(ctxt, root,
	    XML_SCHEMAP_NOROOT,
	    "The XML document '%s' is not a XML schematron document",
	    ctxt->URL, NULL);
	goto exit;
    }
    ret = xmlSchematronNewSchematron(ctxt);
    if (ret == NULL)
        goto exit;
    ctxt->schema = ret;

    /*
     * scan the schema elements
     */
    cur = root->children;
    NEXT_SCHEMATRON(cur);
    if (IS_SCHEMATRON(cur, "title")) {
        xmlChar *title = xmlNodeGetContent(cur);
	if (title != NULL) {
	    ret->title = xmlDictLookup(ret->dict, title, -1);
	    xmlFree(title);
	}
	cur = cur->next;
	NEXT_SCHEMATRON(cur);
    }
    while (IS_SCHEMATRON(cur, "ns")) {
        xmlChar *prefix = xmlGetNoNsProp(cur, BAD_CAST "prefix");
        xmlChar *uri = xmlGetNoNsProp(cur, BAD_CAST "uri");
	if ((uri == NULL) || (uri[0] == 0)) {
	    xmlSchematronPErr(ctxt, cur,
		XML_SCHEMAP_NOROOT,
		"ns element has no uri", NULL, NULL);
	}
	if ((prefix == NULL) || (prefix[0] == 0)) {
	    xmlSchematronPErr(ctxt, cur,
		XML_SCHEMAP_NOROOT,
		"ns element has no prefix", NULL, NULL);
	}
	if ((prefix) && (uri)) {
	    xmlXPathRegisterNs(ctxt->xctxt, prefix, uri);
	    xmlSchematronAddNamespace(ctxt, prefix, uri);
	    ret->nbNs++;
	}
	if (uri)
	    xmlFree(uri);
	if (prefix)
	    xmlFree(prefix);
	cur = cur->next;
	NEXT_SCHEMATRON(cur);
    }
    while (cur != NULL) {
	if (IS_SCHEMATRON(cur, "pattern")) {
	    xmlSchematronParsePattern(ctxt, cur);
	    ret->nbPattern++;
	} else {
	    xmlSchematronPErr(ctxt, cur,
		XML_SCHEMAP_NOROOT,
		"Expecting a pattern element instead of %s", cur->name, NULL);
	}
	cur = cur->next;
	NEXT_SCHEMATRON(cur);
    }
    if (ret->nbPattern == 0) {
	xmlSchematronPErr(ctxt, root,
	    XML_SCHEMAP_NOROOT,
	    "The schematron document '%s' has no pattern",
	    ctxt->URL, NULL);
	goto exit;
    }
    /* the original document must be kept for reporting */
    ret->doc = doc;
1214 1215 1216
    if (preserve) {
	    ret->preserve = 1;
    }
1217 1218 1219 1220 1221 1222
    preserve = 1;

exit:
    if (!preserve) {
	xmlFreeDoc(doc);
    }
1223 1224 1225 1226 1227 1228 1229 1230 1231
    if (ret != NULL) {
	if (ctxt->nberrors != 0) {
	    xmlSchematronFree(ret);
	    ret = NULL;
	} else {
	    ret->namespaces = ctxt->namespaces;
	    ret->nbNamespaces = ctxt->nbNamespaces;
	    ctxt->namespaces = NULL;
	}
1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292
    }
    return (ret);
}

/************************************************************************
 *									*
 *		Schematrontron Reports handler				*
 *									*
 ************************************************************************/

static xmlNodePtr
xmlSchematronGetNode(xmlSchematronValidCtxtPtr ctxt,
                     xmlNodePtr cur, const xmlChar *xpath) {
    xmlNodePtr node = NULL;
    xmlXPathObjectPtr ret;

    if ((ctxt == NULL) || (cur == NULL) || (xpath == NULL))
        return(NULL);

    ctxt->xctxt->doc = cur->doc;
    ctxt->xctxt->node = cur;
    ret = xmlXPathEval(xpath, ctxt->xctxt);
    if (ret == NULL)
        return(NULL);

    if ((ret->type == XPATH_NODESET) &&
        (ret->nodesetval != NULL) && (ret->nodesetval->nodeNr > 0))
	node = ret->nodesetval->nodeTab[0];

    xmlXPathFreeObject(ret);
    return(node);
}

/**
 * xmlSchematronReportOutput:
 * @ctxt: the validation context
 * @cur: the current node tested
 * @msg: the message output
 *
 * Output part of the report to whatever channel the user selected
 */
static void
xmlSchematronReportOutput(xmlSchematronValidCtxtPtr ctxt ATTRIBUTE_UNUSED,
                          xmlNodePtr cur ATTRIBUTE_UNUSED,
                          const char *msg) {
    /* TODO */
    fprintf(stderr, "%s", msg);
}

/**
 * xmlSchematronFormatReport:
 * @ctxt:  the validation context
 * @test: the test node
 * @cur: the current node tested
 *
 * Build the string being reported to the user.
 *
 * Returns a report string or NULL in case of error. The string needs
 *         to be deallocated by teh caller
 */
static xmlChar *
1293
xmlSchematronFormatReport(xmlSchematronValidCtxtPtr ctxt,
1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318
			  xmlNodePtr test, xmlNodePtr cur) {
    xmlChar *ret = NULL;
    xmlNodePtr child, node;

    if ((test == NULL) || (cur == NULL))
        return(ret);

    child = test->children;
    while (child != NULL) {
        if ((child->type == XML_TEXT_NODE) ||
	    (child->type == XML_CDATA_SECTION_NODE))
	    ret = xmlStrcat(ret, child->content);
	else if (IS_SCHEMATRON(child, "name")) {
	    xmlChar *path;

	    path = xmlGetNoNsProp(child, BAD_CAST "path");

            node = cur;
	    if (path != NULL) {
	        node = xmlSchematronGetNode(ctxt, cur, path);
		if (node == NULL)
		    node = cur;
		xmlFree(path);
	    }

1319
	    if ((node->ns == NULL) || (node->ns->prefix == NULL))
1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369
	        ret = xmlStrcat(ret, node->name);
	    else {
	        ret = xmlStrcat(ret, node->ns->prefix);
	        ret = xmlStrcat(ret, BAD_CAST ":");
	        ret = xmlStrcat(ret, node->name);
	    }
	} else {
	    child = child->next;
	    continue;
	}

	/*
	 * remove superfluous \n
	 */
	if (ret != NULL) {
	    int len = xmlStrlen(ret);
	    xmlChar c;

	    if (len > 0) {
		c = ret[len - 1];
		if ((c == ' ') || (c == '\n') || (c == '\r') || (c == '\t')) {
		    while ((c == ' ') || (c == '\n') ||
		           (c == '\r') || (c == '\t')) {
			len--;
			if (len == 0)
			    break;
			c = ret[len - 1];
		    }
		    ret[len] = ' ';
		    ret[len + 1] = 0;
		}
	    }
	}

        child = child->next;
    }
    return(ret);
}

/**
 * xmlSchematronReportSuccess:
 * @ctxt:  the validation context
 * @test: the compiled test
 * @cur: the current node tested
 * @success: boolean value for the result
 *
 * called from the validation engine when an assert or report test have
 * been done.
 */
static void
1370
xmlSchematronReportSuccess(xmlSchematronValidCtxtPtr ctxt,
1371
		   xmlSchematronTestPtr test, xmlNodePtr cur, xmlSchematronPatternPtr pattern, int success) {
1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401
    if ((ctxt == NULL) || (cur == NULL) || (test == NULL))
        return;
    /* if quiet and not SVRL report only failures */
    if ((ctxt->flags & XML_SCHEMATRON_OUT_QUIET) &&
        ((ctxt->flags & XML_SCHEMATRON_OUT_XML) == 0) &&
	(test->type == XML_SCHEMATRON_REPORT))
        return;
    if (ctxt->flags & XML_SCHEMATRON_OUT_XML) {
        TODO
    } else {
        xmlChar *path;
	char msg[1000];
	long line;
	const xmlChar *report = NULL;

        if (((test->type == XML_SCHEMATRON_REPORT) & (!success)) ||
	    ((test->type == XML_SCHEMATRON_ASSERT) & (success)))
	    return;
	line = xmlGetLineNo(cur);
	path = xmlGetNodePath(cur);
	if (path == NULL)
	    path = (xmlChar *) cur->name;
#if 0
	if ((test->report != NULL) && (test->report[0] != 0))
	    report = test->report;
#endif
	if (test->node != NULL)
            report = xmlSchematronFormatReport(ctxt, test->node, cur);
	if (report == NULL) {
	    if (test->type == XML_SCHEMATRON_ASSERT) {
1402
            report = xmlStrdup((const xmlChar *) "node failed assert");
1403
	    } else {
1404 1405
            report = xmlStrdup((const xmlChar *) "node failed report");
	    }
1406 1407 1408
	    }
	    snprintf(msg, 999, "%s line %ld: %s\n", (const char *) path,
		     line, (const char *) report);
1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420

    if (ctxt->flags & XML_SCHEMATRON_OUT_ERROR) {
        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;
1421
	}
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        __xmlRaiseError(schannel, channel, data,
                        NULL, cur, XML_FROM_SCHEMATRONV,
                        (test->type == XML_SCHEMATRON_ASSERT)?XML_SCHEMATRONV_ASSERT:XML_SCHEMATRONV_REPORT,
                        XML_ERR_ERROR, NULL, line,
                        (pattern == NULL)?NULL:((const char *) pattern->name),
                        (const char *) path,
                        (const char *) report, 0, 0,
1430
                        "%s", msg);
1431
    } else {
1432
	xmlSchematronReportOutput(ctxt, cur, &msg[0]);
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    }

    xmlFree((char *) report);

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	if ((path != NULL) && (path != (xmlChar *) cur->name))
	    xmlFree(path);
    }
}

/**
 * xmlSchematronReportPattern:
 * @ctxt:  the validation context
 * @pattern: the current pattern
 *
 * called from the validation engine when starting to check a pattern
 */
static void
1450
xmlSchematronReportPattern(xmlSchematronValidCtxtPtr ctxt,
1451 1452 1453
			   xmlSchematronPatternPtr pattern) {
    if ((ctxt == NULL) || (pattern == NULL))
        return;
1454
    if ((ctxt->flags & XML_SCHEMATRON_OUT_QUIET) || (ctxt->flags & XML_SCHEMATRON_OUT_ERROR)) /* Error gives pattern name as part of error */
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        return;
    if (ctxt->flags & XML_SCHEMATRON_OUT_XML) {
        TODO
    } else {
	char msg[1000];

	if (pattern->name == NULL)
	    return;
	snprintf(msg, 999, "Pattern: %s\n", (const char *) pattern->name);
	xmlSchematronReportOutput(ctxt, NULL, &msg[0]);
    }
}


/************************************************************************
 *									*
 *		Validation against a Schematrontron				*
 *									*
 ************************************************************************/

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/**
 * xmlSchematronSetValidStructuredErrors:
 * @ctxt:  a Schematron validation context
 * @serror:  the structured error function
 * @ctx: the functions context
 *
 * Set the structured error callback
 */
void
xmlSchematronSetValidStructuredErrors(xmlSchematronValidCtxtPtr ctxt,
                                      xmlStructuredErrorFunc serror, void *ctx)
{
    if (ctxt == NULL)
        return;
    ctxt->serror = serror;
    ctxt->error = NULL;
    ctxt->warning = NULL;
    ctxt->userData = ctx;
}

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/**
 * xmlSchematronNewValidCtxt:
 * @schema:  a precompiled XML Schematrons
 * @options: a set of xmlSchematronValidOptions
 *
 * Create an XML Schematrons validation context based on the given schema.
 *
 * Returns the validation context or NULL in case of error
 */
xmlSchematronValidCtxtPtr
xmlSchematronNewValidCtxt(xmlSchematronPtr schema, int options)
{
    int i;
    xmlSchematronValidCtxtPtr ret;

    ret = (xmlSchematronValidCtxtPtr) xmlMalloc(sizeof(xmlSchematronValidCtxt));
    if (ret == NULL) {
        xmlSchematronVErrMemory(NULL, "allocating validation context",
                                NULL);
        return (NULL);
    }
    memset(ret, 0, sizeof(xmlSchematronValidCtxt));
    ret->type = XML_STRON_CTXT_VALIDATOR;
    ret->schema = schema;
    ret->xctxt = xmlXPathNewContext(NULL);
    ret->flags = options;
    if (ret->xctxt == NULL) {
        xmlSchematronPErrMemory(NULL, "allocating schema parser XPath context",
                                NULL);
	xmlSchematronFreeValidCtxt(ret);
        return (NULL);
    }
    for (i = 0;i < schema->nbNamespaces;i++) {
        if ((schema->namespaces[2 * i] == NULL) ||
            (schema->namespaces[2 * i + 1] == NULL))
	    break;
	xmlXPathRegisterNs(ret->xctxt, schema->namespaces[2 * i + 1],
	                   schema->namespaces[2 * i]);
    }
    return (ret);
}

/**
 * xmlSchematronFreeValidCtxt:
 * @ctxt:  the schema validation context
 *
 * Free the resources associated to the schema validation context
 */
void
xmlSchematronFreeValidCtxt(xmlSchematronValidCtxtPtr ctxt)
{
    if (ctxt == NULL)
        return;
    if (ctxt->xctxt != NULL)
        xmlXPathFreeContext(ctxt->xctxt);
    if (ctxt->dict != NULL)
        xmlDictFree(ctxt->dict);
    xmlFree(ctxt);
}

static xmlNodePtr
xmlSchematronNextNode(xmlNodePtr cur) {
    if (cur->children != NULL) {
	/*
	 * Do not descend on entities declarations
	 */
	if (cur->children->type != XML_ENTITY_DECL) {
	    cur = cur->children;
	    /*
	     * Skip DTDs
	     */
	    if (cur->type != XML_DTD_NODE)
		return(cur);
	}
    }

    while (cur->next != NULL) {
	cur = cur->next;
	if ((cur->type != XML_ENTITY_DECL) &&
	    (cur->type != XML_DTD_NODE))
	    return(cur);
    }
1577

1578 1579
    do {
	cur = cur->parent;
1580
	if (cur == NULL) break;
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	if (cur->type == XML_DOCUMENT_NODE) return(NULL);
	if (cur->next != NULL) {
	    cur = cur->next;
	    return(cur);
	}
    } while (cur != NULL);
    return(cur);
}

/**
 * xmlSchematronRunTest:
 * @ctxt:  the schema validation context
 * @test:  the current test
1594
 * @instance:  the document instace tree
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 * @cur:  the current node in the instance
 *
 * Validate a rule against a tree instance at a given position
 *
 * Returns 1 in case of success, 0 if error and -1 in case of internal error
 */
static int
xmlSchematronRunTest(xmlSchematronValidCtxtPtr ctxt,
1603
     xmlSchematronTestPtr test, xmlDocPtr instance, xmlNodePtr cur, xmlSchematronPatternPtr pattern)
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{
    xmlXPathObjectPtr ret;
    int failed;

    failed = 0;
    ctxt->xctxt->doc = instance;
    ctxt->xctxt->node = cur;
    ret = xmlXPathCompiledEval(test->comp, ctxt->xctxt);
    if (ret == NULL) {
	failed = 1;
    } else {
        switch (ret->type) {
	    case XPATH_XSLT_TREE:
	    case XPATH_NODESET:
		if ((ret->nodesetval == NULL) ||
		    (ret->nodesetval->nodeNr == 0))
		    failed = 1;
		break;
	    case XPATH_BOOLEAN:
		failed = !ret->boolval;
		break;
	    case XPATH_NUMBER:
		if ((xmlXPathIsNaN(ret->floatval)) ||
		    (ret->floatval == 0.0))
		    failed = 1;
		break;
	    case XPATH_STRING:
		if ((ret->stringval == NULL) ||
		    (ret->stringval[0] == 0))
		    failed = 1;
		break;
	    case XPATH_UNDEFINED:
	    case XPATH_POINT:
	    case XPATH_RANGE:
	    case XPATH_LOCATIONSET:
	    case XPATH_USERS:
		failed = 1;
		break;
	}
	xmlXPathFreeObject(ret);
    }
    if ((failed) && (test->type == XML_SCHEMATRON_ASSERT))
        ctxt->nberrors++;
    else if ((!failed) && (test->type == XML_SCHEMATRON_REPORT))
        ctxt->nberrors++;

1650
    xmlSchematronReportSuccess(ctxt, test, cur, pattern, !failed);
1651 1652 1653 1654 1655 1656 1657

    return(!failed);
}

/**
 * xmlSchematronValidateDoc:
 * @ctxt:  the schema validation context
1658
 * @instance:  the document instace tree
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 *
 * Validate a tree instance against the schematron
 *
 * Returns 0 in case of success, -1 in case of internal error
 *         and an error count otherwise.
 */
int
xmlSchematronValidateDoc(xmlSchematronValidCtxtPtr ctxt, xmlDocPtr instance)
{
    xmlNodePtr cur, root;
    xmlSchematronPatternPtr pattern;
    xmlSchematronRulePtr rule;
    xmlSchematronTestPtr test;

    if ((ctxt == NULL) || (ctxt->schema == NULL) ||
        (ctxt->schema->rules == NULL) || (instance == NULL))
        return(-1);
    ctxt->nberrors = 0;
    root = xmlDocGetRootElement(instance);
    if (root == NULL) {
        TODO
	ctxt->nberrors++;
	return(1);
    }
    if ((ctxt->flags & XML_SCHEMATRON_OUT_QUIET) ||
        (ctxt->flags == 0)) {
	/*
	 * we are just trying to assert the validity of the document,
	 * speed primes over the output, run in a single pass
	 */
	cur = root;
	while (cur != NULL) {
	    rule = ctxt->schema->rules;
	    while (rule != NULL) {
		if (xmlPatternMatch(rule->pattern, cur) == 1) {
		    test = rule->tests;
		    while (test != NULL) {
1696
			xmlSchematronRunTest(ctxt, test, instance, cur, (xmlSchematronPatternPtr)rule->pattern);
1697 1698 1699 1700 1701
			test = test->next;
		    }
		}
		rule = rule->next;
	    }
1702

1703 1704 1705 1706 1707 1708 1709
	    cur = xmlSchematronNextNode(cur);
	}
    } else {
        /*
	 * Process all contexts one at a time
	 */
	pattern = ctxt->schema->patterns;
1710

1711 1712 1713 1714 1715 1716
	while (pattern != NULL) {
	    xmlSchematronReportPattern(ctxt, pattern);

	    /*
	     * TODO convert the pattern rule to a direct XPath and
	     * compute directly instead of using the pattern matching
1717
	     * over the full document...
1718 1719 1720 1721 1722 1723 1724 1725 1726
	     * Check the exact semantic
	     */
	    cur = root;
	    while (cur != NULL) {
		rule = pattern->rules;
		while (rule != NULL) {
		    if (xmlPatternMatch(rule->pattern, cur) == 1) {
			test = rule->tests;
			while (test != NULL) {
1727
			    xmlSchematronRunTest(ctxt, test, instance, cur, pattern);
1728 1729 1730 1731 1732
			    test = test->next;
			}
		    }
		    rule = rule->patnext;
		}
1733

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		cur = xmlSchematronNextNode(cur);
	    }
	    pattern = pattern->next;
	}
    }
    return(ctxt->nberrors);
}

#ifdef STANDALONE
int
main(void)
{
    int ret;
    xmlDocPtr instance;
    xmlSchematronParserCtxtPtr pctxt;
    xmlSchematronValidCtxtPtr vctxt;
    xmlSchematronPtr schema = NULL;

    pctxt = xmlSchematronNewParserCtxt("tst.sct");
    if (pctxt == NULL) {
        fprintf(stderr, "failed to build schematron parser\n");
    } else {
        schema = xmlSchematronParse(pctxt);
	if (schema == NULL) {
	    fprintf(stderr, "failed to compile schematron\n");
	}
	xmlSchematronFreeParserCtxt(pctxt);
    }
    instance = xmlReadFile("tst.sct", NULL,
                           XML_PARSE_NOENT | XML_PARSE_NOCDATA);
    if (instance == NULL) {
	fprintf(stderr, "failed to parse instance\n");
    }
    if ((schema != NULL) && (instance != NULL)) {
        vctxt = xmlSchematronNewValidCtxt(schema);
	if (vctxt == NULL) {
	    fprintf(stderr, "failed to build schematron validator\n");
	} else {
	    ret = xmlSchematronValidateDoc(vctxt, instance);
	    xmlSchematronFreeValidCtxt(vctxt);
	}
    }
    xmlSchematronFree(schema);
    xmlFreeDoc(instance);

    xmlCleanupParser();
    xmlMemoryDump();

    return (0);
}
#endif
#define bottom_schematron
#include "elfgcchack.h"
#endif /* LIBXML_SCHEMATRON_ENABLED */