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schematron.c
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/*
* schematron.c : implementation of the Schematron schema validity checking
*
* See Copyright for the status of this software.
*
* Daniel Veillard <[email protected]>
*/
/*
* 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 <stdlib.h>
#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>
#include "private/error.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) { \
if ((node->type == XML_ELEMENT_NODE ) && (node->ns != NULL) && \
((xmlStrEqual(node->ns->href, xmlSchematronNs)) || \
(xmlStrEqual(node->ns->href, xmlOldSchematronNs)))) \
break; \
node = node->next; \
}
typedef enum {
XML_SCHEMATRON_ASSERT=1,
XML_SCHEMATRON_REPORT=2
} xmlSchematronTestType;
/**
* _xmlSchematronLet:
*
* A Schematron let variable
*/
typedef struct _xmlSchematronLet xmlSchematronLet;
typedef xmlSchematronLet *xmlSchematronLetPtr;
struct _xmlSchematronLet {
xmlSchematronLetPtr next; /* the next let variable in the list */
xmlChar *name; /* the name of the variable */
xmlXPathCompExprPtr comp; /* the compiled expression */
};
/**
* _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 */
xmlSchematronLetPtr lets; /* the list of let variables */
};
/**
* _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 */
xmlDictPtr dict; /* the dictionary used internally */
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 */
#ifdef LIBXML_OUTPUT_ENABLED
xmlOutputWriteCallback iowrite; /* if using XML_SCHEMATRON_OUT_IO */
xmlOutputCloseCallback ioclose;
#endif
void *ioctx;
/* 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 */
};
struct _xmlSchematronParserCtxt {
int type;
const xmlChar *URL;
xmlDocPtr doc;
int preserve; /* Whether the doc should be freed */
const char *buffer;
int size;
xmlDictPtr dict; /* dictionary for interned string names */
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 */
/* 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 */
};
#define XML_STRON_CTXT_PARSER 1
#define XML_STRON_CTXT_VALIDATOR 2
/************************************************************************
* *
* Error reporting *
* *
************************************************************************/
/**
* xmlSchematronPErrMemory:
* @node: a context node
* @extra: extra information
*
* Handle an out of memory condition
*/
static void
xmlSchematronPErrMemory(xmlSchematronParserCtxtPtr ctxt)
{
if (ctxt != NULL)
ctxt->nberrors++;
xmlRaiseMemoryError(NULL, NULL, NULL, XML_FROM_SCHEMASP, NULL);
}
/**
* xmlSchematronPErr:
* @ctxt: the parsing context
* @node: the context node
* @error: the error code
* @msg: the error message
* @str1: extra data
* @str2: extra data
*
* Handle a parser error
*/
static void LIBXML_ATTR_FORMAT(4,0)
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;
int res;
if (ctxt != NULL) {
ctxt->nberrors++;
channel = ctxt->error;
data = ctxt->userData;
schannel = ctxt->serror;
}
if ((channel == NULL) && (schannel == NULL)) {
channel = xmlGenericError;
data = xmlGenericErrorContext;
}
res = 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);
if (res < 0)
xmlSchematronPErrMemory(ctxt);
}
/**
* xmlSchematronVTypeErrMemory:
* @node: a context node
* @extra: extra information
*
* Handle an out of memory condition
*/
static void
xmlSchematronVErrMemory(xmlSchematronValidCtxtPtr ctxt)
{
if (ctxt != NULL) {
ctxt->nberrors++;
ctxt->err = XML_SCHEMAV_INTERNAL;
}
xmlRaiseMemoryError(NULL, NULL, NULL, XML_FROM_SCHEMASV, NULL);
}
/**
* xmlSchematronVErr:
* @ctxt: the parsing context
* @node: the context node
* @error: the error code
* @msg: the error message
* @str1: extra data
* @str2: extra data
*
* Handle a validation error
*/
static void LIBXML_ATTR_FORMAT(3,0)
xmlSchematronVErr(xmlSchematronValidCtxtPtr ctxt, int error,
const char *msg, const xmlChar * str1)
{
xmlGenericErrorFunc channel = NULL;
xmlStructuredErrorFunc schannel = NULL;
void *data = NULL;
int res;
if (ctxt != NULL) {
ctxt->nberrors++;
channel = ctxt->error;
data = ctxt->userData;
schannel = ctxt->serror;
}
if ((channel == NULL) && (schannel == NULL)) {
channel = xmlGenericError;
data = xmlGenericErrorContext;
}
res = xmlRaiseError(schannel, channel, data, ctxt, NULL,
XML_FROM_SCHEMASV, error, XML_ERR_ERROR, NULL, 0,
(const char *) str1, NULL, NULL, 0, 0,
msg, str1);
if (res < 0)
xmlSchematronVErrMemory(ctxt);
}
/************************************************************************
* *
* 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);
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;
}
}
/**
* xmlSchematronFreeLets:
* @lets: a list of let variables
*
* Free a list of let variables.
*/
static void
xmlSchematronFreeLets(xmlSchematronLetPtr lets) {
xmlSchematronLetPtr next;
while (lets != NULL) {
next = lets->next;
if (lets->name != NULL)
xmlFree(lets->name);
if (lets->comp != NULL)
xmlXPathFreeCompExpr(lets->comp);
xmlFree(lets);
lets = 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);
return (NULL);
}
memset(ret, 0, sizeof(xmlSchematronRule));
ret->node = node;
ret->context = context;
ret->pattern = pattern;
ret->report = report;
ret->next = NULL;
ret->lets = 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);
if (rules->lets != NULL)
xmlSchematronFreeLets(rules->lets);
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);
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);
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)
xmlFree((char **) schema->namespaces);
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);
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);
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);
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);
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);
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);
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)
xmlFree((char **) ctxt->namespaces);
xmlDictFree(ctxt->dict);
xmlFree(ctxt);
}
#if 0
/**
* 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);
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);
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);
}
#endif
/**
* 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);
return;
}
ctxt->nbNamespaces = 0;
} else if (ctxt->nbNamespaces + 2 >= ctxt->maxNamespaces) {
const xmlChar **tmp;
tmp = (const xmlChar **)
xmlRealloc((xmlChar **) ctxt->namespaces, ctxt->maxNamespaces * 4 *
sizeof(const xmlChar *));
if (tmp == NULL) {
xmlSchematronPErrMemory(NULL);
return;
}
ctxt->namespaces = tmp;
ctxt->maxNamespaces *= 2;
}
ctxt->namespaces[2 * ctxt->nbNamespaces] =
xmlDictLookup(ctxt->dict, ns, -1);
ctxt->namespaces[2 * ctxt->nbNamespaces + 1] =
xmlDictLookup(ctxt->dict, prefix, -1);
ctxt->nbNamespaces++;
ctxt->namespaces[2 * ctxt->nbNamespaces] = NULL;
ctxt->namespaces[2 * ctxt->nbNamespaces + 1] = NULL;
}
/**
* xmlSchematronParseTestReportMsg:
* @ctxt: the schema parser context
* @con: the assert or report node
*
* Format the message content of the assert or report test
*/
static void
xmlSchematronParseTestReportMsg(xmlSchematronParserCtxtPtr ctxt, xmlNodePtr con)
{
xmlNodePtr child;
xmlXPathCompExprPtr comp;
child = con->children;
while (child != NULL) {
if ((child->type == XML_TEXT_NODE) ||
(child->type == XML_CDATA_SECTION_NODE))
/* Do Nothing */
{}
else if (IS_SCHEMATRON(child, "name")) {
/* Do Nothing */
} else if (IS_SCHEMATRON(child, "value-of")) {
xmlChar *select;
select = xmlGetNoNsProp(child, BAD_CAST "select");
if (select == NULL) {
xmlSchematronPErr(ctxt, child,
XML_SCHEMAV_ATTRINVALID,
"value-of has no select attribute",
NULL, NULL);
} else {
/*
* try first to compile the test expression
*/
comp = xmlXPathCtxtCompile(ctxt->xctxt, select);
if (comp == NULL) {
xmlSchematronPErr(ctxt, child,
XML_SCHEMAV_ATTRINVALID,
"Failed to compile select expression %s",
select, NULL);
}
xmlXPathFreeCompExpr(comp);
}
xmlFree(select);
}
child = child->next;
}
}
/**
* 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;
xmlChar *name;
xmlChar *value;
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;