/**
* xsltFreeKeyDefList:
* @keyd: an XSLT key definition list
*
* Free up the memory allocated by all the elements of @keyd
*/
static void
xsltFreeKeyDefList(xsltKeyDefPtr keyd) {
xsltKeyDefPtr cur;
while (keyd != NULL) {
cur = keyd;
keyd = keyd->next;
xsltFreeKeyDef(cur);
}
}
/**
* xsltAddKey:
* @style: an XSLT stylesheet
* @name: the key name or NULL
* @nameURI: the name URI or NULL
* @match: the match value
* @use: the use value
* @inst: the key instruction
*
* add a key definition to a stylesheet
*
* Returns 0 in case of success, and -1 in case of failure.
*/
int
xsltAddKey(xsltStylesheetPtr style, const xmlChar *name,
const xmlChar *nameURI, const xmlChar *match,
const xmlChar *use, xmlNodePtr inst) {
xsltKeyDefPtr key;
xmlChar *pattern = NULL;
int current, end, start, i = 0;
if ((style == NULL) || (name == NULL) || (match == NULL) || (use == NULL))
return(-1);
#ifdef WITH_XSLT_DEBUG_KEYS
xsltGenericDebug(xsltGenericDebugContext,
"Add key %s, match %s, use %s\n", name, match, use);
#endif
key = xsltNewKeyDef(name, nameURI);
key->match = xmlStrdup(match);
key->use = xmlStrdup(use);
key->inst = inst;
key->nsList = xmlGetNsList(inst->doc, inst);
if (key->nsList != NULL) {
while (key->nsList[i] != NULL)
i++;
}
key->nsNr = i;
/*
* Split the | and register it as as many keys
*/
current = end = 0;
while (match[current] != 0) {
start = current;
while (IS_BLANK_CH(match[current]))
current++;
end = current;
while ((match[end] != 0) && (match[end] != '|')) {
if (match[end] == '[') {
end = skipPredicate(match, end);
if (end <= 0) {
xsltTransformError(NULL, style, inst,
"xsl:key : 'match' pattern is malformed: %s",
key->match);
if (style != NULL) style->errors++;
goto error;
}
} else
end++;
}
if (current == end) {
xsltTransformError(NULL, style, inst,
"xsl:key : 'match' pattern is empty\n");
if (style != NULL) style->errors++;
goto error;
}
if (match[start] != '/') {
pattern = xmlStrcat(pattern, (xmlChar *)"//");
if (pattern == NULL) {
if (style != NULL) style->errors++;
goto error;
}
}
pattern = xmlStrncat(pattern, &match[start], end - start);
if (pattern == NULL) {
if (style != NULL) style->errors++;
goto error;
}
if (match[end] == '|') {
pattern = xmlStrcat(pattern, (xmlChar *)"|");
end++;
}
current = end;
}
if (pattern == NULL) {
xsltTransformError(NULL, style, inst,
"xsl:key : 'match' pattern is empty\n");
if (style != NULL) style->errors++;
goto error;
}
#ifdef WITH_XSLT_DEBUG_KEYS
xsltGenericDebug(xsltGenericDebugContext,
" resulting pattern %s\n", pattern);
#endif
/*
* XSLT-1: "It is an error for the value of either the use
* attribute or the match attribute to contain a
* VariableReference."
* TODO: We should report a variable-reference at compile-time.
* Maybe a search for "$", if it occurs outside of quotation
* marks, could be sufficient.
*/
#ifdef XML_XPATH_NOVAR
key->comp = xsltXPathCompileFlags(style, pattern, XML_XPATH_NOVAR);
#else
key->comp = xsltXPathCompile(style, pattern);
#endif
if (key->comp == NULL) {
xsltTransformError(NULL, style, inst,
"xsl:key : 'match' pattern compilation failed '%s'\n",
pattern);
if (style != NULL) style->errors++;
}
#ifdef XML_XPATH_NOVAR
key->usecomp = xsltXPathCompileFlags(style, use, XML_XPATH_NOVAR);
#else
key->usecomp = xsltXPathCompile(style, use);
#endif
if (key->usecomp == NULL) {
xsltTransformError(NULL, style, inst,
"xsl:key : 'use' expression compilation failed '%s'\n",
use);
if (style != NULL) style->errors++;
}
/*
* Sometimes the stylesheet writer use the order to ease the
* resolution of keys when they are dependant, keep the provided
* order so add the new one at the end.
*/
if (style->keys == NULL) {
style->keys = key;
} else {
xsltKeyDefPtr prev = style->keys;
while (prev->next != NULL)
prev = prev->next;
prev->next = key;
}
key->next = NULL;
key = NULL;
error:
if (pattern != NULL)
xmlFree(pattern);
if (key != NULL)
xsltFreeKeyDef(key);
return(0);
}
