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propagating xpath ancesstors node fix to c14n plus small performance

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* c14n.c: propagating xpath ancesstors node fix to c14n                         plus small performance improvement to reduce number of                          mallocs                                                                         * xpath.c: fixed ancestors axis processing for namespace nodes
This commit is contained in:
Aleksey Sanin
2002-05-31 04:24:13 +00:00
parent 12171c4db1
commit dffd5c8dbc
3 changed files with 134 additions and 64 deletions
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7
ChangeLog
View File

@ -1,3 +1,10 @@
Thu May 30 21:23:06 2002 Aleksey Sanin <aleksey@aleksey.com>
* c14n.c: propagating xpath ancesstors node fix to c14n
plus small performance improvement to reduce number of
mallocs
* xpath.c: fixed ancestors axis processing for namespace nodes
Wed May 29 10:21:39 CEST 2002 Daniel Veillard <daniel@veillard.com>
* SAX.c parser.c tree.c include/libxml/tree.h: performance patch from

176
c14n.c
View File

@ -38,6 +38,12 @@ typedef enum {
XMLC14N_AFTER_DOCUMENT_ELEMENT = 2
} xmlC14NPosition;
typedef struct _xmlC14NNamespaces {
int nsNr; /* number of nodes in the set */
int nsMax; /* size of the array as allocated */
xmlNsPtr *nsTab; /* array of nodes in no particular order */
} xmlC14NNamespaces, *xmlC14NNamespacesPtr;
typedef struct _xmlC14NCtx {
/* input parameters */
xmlDocPtr doc;
@ -48,10 +54,10 @@ typedef struct _xmlC14NCtx {
/* position in the XML document */
xmlC14NPosition pos;
int parent_is_doc;
xmlC14NNamespacesPtr ns_rendered;
/* exclusive canonicalization */
int exclusive;
xmlNodeSetPtr ns_rendered;
xmlChar **inclusive_ns_prefixes;
} xmlC14NCtx, *xmlC14NCtxPtr;
@ -82,6 +88,67 @@ static xmlChar *xmlC11NNormalizeString(const xmlChar * input,
* The implementation internals *
* *
************************************************************************/
#define XML_NAMESPACES_DEFAULT 16
static xmlC14NNamespacesPtr
xmlC14NNamespacesCreate() {
xmlC14NNamespacesPtr ret;
ret = (xmlC14NNamespacesPtr) xmlMalloc(sizeof(xmlC14NNamespaces));
if (ret == NULL) {
xmlGenericError(xmlGenericErrorContext,
"xmlC14NNamespacesCreate: out of memory\n");
return(NULL);
}
memset(ret, 0 , (size_t) sizeof(xmlC14NNamespaces));
return(ret);
}
static void
xmlC14NNamespacesDestroy(xmlC14NNamespacesPtr cur) {
if(cur == NULL) {
return;
}
if(cur->nsTab != NULL) {
memset(cur->nsTab, 0, cur->nsMax * sizeof(xmlNsPtr));
xmlFree(cur->nsTab);
}
memset(cur, 0, sizeof(xmlC14NNamespaces));
xmlFree(cur);
}
static void xmlC14NNamespacesAdd(xmlC14NNamespacesPtr cur, xmlNsPtr ns) {
if((cur == NULL) || (ns == NULL)) {
return;
}
if (cur->nsTab == NULL) {
cur->nsTab = (xmlNsPtr*) xmlMalloc(XML_NAMESPACES_DEFAULT * sizeof(xmlNsPtr));
if (cur->nsTab == NULL) {
xmlGenericError(xmlGenericErrorContext,
"xmlC14NNamespacesAdd: out of memory\n");
return;
}
memset(cur->nsTab, 0 , XML_NAMESPACES_DEFAULT * sizeof(xmlNsPtr));
cur->nsMax = XML_NAMESPACES_DEFAULT;
} else if(cur->nsMax == cur->nsNr) {
xmlNsPtr *tmp;
int tmpSize;
tmpSize = 2 * cur->nsMax;
tmp = (xmlNsPtr*) xmlRealloc(cur->nsTab, tmpSize * sizeof(xmlNsPtr));
if (tmp == NULL) {
xmlGenericError(xmlGenericErrorContext,
"xmlC14NNamespacesAdd: out of memory\n");
return;
}
cur->nsTab = tmp;
cur->nsMax = tmpSize;
}
cur->nsTab[cur->nsNr++] = ns;
}
/**
* xmlC14NIsVisible:
@ -150,9 +217,9 @@ xmlExcC14NIsRendered(xmlC14NCtxPtr ctx, xmlNsPtr ns)
return (0);
}
if (ctx->ns_rendered->nodeTab != NULL) {
for (i = ctx->ns_rendered->nodeNr - 1; i >= 0; --i) {
xmlNsPtr ns1 = (xmlNsPtr) ctx->ns_rendered->nodeTab[i];
if (ctx->ns_rendered->nsTab != NULL) {
for (i = ctx->ns_rendered->nsNr - 1; i >= 0; --i) {
xmlNsPtr ns1 = (xmlNsPtr) ctx->ns_rendered->nsTab[i];
if (xmlStrEqual(ns1->prefix, ns->prefix)) {
return (xmlStrEqual(ns1->href, ns->href));
@ -267,8 +334,6 @@ xmlC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur)
xmlNsPtr ns;
xmlListPtr list;
xmlNodePtr visible_parent;
xmlNodePtr node;
xmlNsPtr prev;
if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
#ifdef DEBUG_C14N
@ -293,53 +358,46 @@ xmlC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur)
/* find nearest visible parent */
visible_parent = cur->parent;
while ((visible_parent != NULL) &&
(!xmlC14NIsVisible(ctx, visible_parent))) {
while ((visible_parent != NULL) && (!xmlC14NIsVisible(ctx, visible_parent))) {
visible_parent = visible_parent->parent;
}
/*
* todo: the libxml XPath implementation does not create
* nodes for all namespaces known to the node (i.e. for namespaces
* defined in node parents). By this we need to now walk thru
* all namespace in current node and all invisible ancesstors
*/
node = cur;
while (cur != visible_parent) {
for (ns = cur->nsDef; ns != NULL; ns = ns->next) {
/*
* first of all ignore default "xml" namespace and
* already included namespace
*/
if ((xmlC14NIsXmlNs(ns)) || (xmlListSearch(list, ns) != NULL)) {
continue;
if(ctx->visible_nodes == NULL) {
xmlNodePtr node;
/*
* the libxml does not create nodes for all namespaces known
* to the node (i.e. for namespaces defined in node parents).
* By this we need to now walk thru all namespace in current
* node and all invisible ancesstors
*/
node = cur;
while (cur != visible_parent) {
for (ns = cur->nsDef; ns != NULL; ns = ns->next) {
if(!xmlC14NIsXmlNs(ns) && !xmlExcC14NIsRendered(ctx, ns)) {
xmlListInsert(list, ns);
xmlC14NNamespacesAdd(ctx->ns_rendered, ns);
}
}
cur = cur->parent;
}
} else {
int i;
/*
* All visible namespace nodes are in the nodes set
*/
for(i = 0; i < ctx->visible_nodes->nodeNr; i++) {
if(ctx->visible_nodes->nodeTab[i]->type == XML_NAMESPACE_DECL) {
ns = (xmlNsPtr) ctx->visible_nodes->nodeTab[i];
if((ns != NULL) && (ns->next == (xmlNsPtr)cur) &&
!xmlC14NIsXmlNs(ns) && !xmlExcC14NIsRendered(ctx, ns)) {
xmlListInsert(list, ns);
xmlC14NNamespacesAdd(ctx->ns_rendered, ns);
}
}
prev = xmlSearchNs(ctx->doc, node, ns->prefix);
if(prev != ns) {
/* we already processed a namespace with this name */
continue;
}
/*
* Lookup nearest namespace after visible parent having
* the same prefix. Namespace included if and only if one of
* the following:
* - another namespace having the same prefix but
* different value found or
* - there is no namespaces having the same prefix and
* it is not a default xmlns="" namespace (empty prefix
* and empty href)
*/
prev = xmlSearchNs(ctx->doc, visible_parent, ns->prefix);
if ((prev == NULL) && ((xmlStrlen(ns->prefix) > 0) ||
(xmlStrlen(ns->href) > 0))) {
xmlListInsert(list, ns);
} else if ((prev != NULL)
&& (!xmlStrEqual(ns->href, prev->href))) {
xmlListInsert(list, ns);
}
}
cur = cur->parent;
}
}
/*
@ -355,6 +413,7 @@ xmlC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur)
return (0);
}
/**
* xmlExcC14NProcessNamespacesAxis:
* @ctx: the C14N context
@ -426,12 +485,13 @@ xmlExcC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur)
* First of all, add all namespaces required by current node
* (i.e. node namespace and all attribute namespaces)
* we also need to check for default "xml:" namespace
* todo: shouldn't we check for namespaces "visibility"?
*/
ns = (cur->ns != NULL) ? cur->ns : xmlSearchNs(ctx->doc, cur, NULL);
if ((ns != NULL) && (!xmlC14NIsXmlNs(ns)) &&
(xmlListSearch(list, ns) == NULL) && !xmlExcC14NIsRendered(ctx, ns)) {
xmlListInsert(list, ns);
xmlXPathNodeSetAdd(ctx->ns_rendered, (xmlNodePtr) ns);
xmlC14NNamespacesAdd(ctx->ns_rendered, ns);
}
attr = cur->properties;
while (attr != NULL) {
@ -444,7 +504,7 @@ xmlExcC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur)
(!xmlC14NIsXmlNs(attr->ns)) &&
(xmlListSearch(list, attr->ns) == NULL) && (!xmlExcC14NIsRendered(ctx, attr->ns))) {
xmlListInsert(list, attr->ns);
xmlXPathNodeSetAdd(ctx->ns_rendered, (xmlNodePtr) attr->ns);
xmlC14NNamespacesAdd(ctx->ns_rendered, attr->ns);
}
attr = attr->next;
}
@ -470,7 +530,7 @@ xmlExcC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur)
if (xmlListSearch(list, ns) == NULL &&
!xmlExcC14NIsRendered(ctx, ns)) {
xmlListInsert(list, ns);
xmlXPathNodeSetAdd(ctx->ns_rendered, (xmlNodePtr) ns);
xmlC14NNamespacesAdd(ctx->ns_rendered, ns);
}
}
}
@ -809,8 +869,8 @@ xmlC14NProcessElementNode(xmlC14NCtxPtr ctx, xmlNodePtr cur, int visible)
* Save ns_rendered stack position for exclusive
* processing
*/
if ((ctx->exclusive) && (ctx->ns_rendered != NULL)) {
ns_rendered_pos = ctx->ns_rendered->nodeNr;
if (ctx->ns_rendered != NULL) {
ns_rendered_pos = ctx->ns_rendered->nsNr;
}
if (visible) {
@ -883,8 +943,8 @@ xmlC14NProcessElementNode(xmlC14NCtxPtr ctx, xmlNodePtr cur, int visible)
* Restore ns_rendered stack position for exclusive
* processing
*/
if ((ctx->exclusive) && (ctx->ns_rendered != NULL)) {
ctx->ns_rendered->nodeNr = ns_rendered_pos;
if (ctx->ns_rendered != NULL) {
ctx->ns_rendered->nsNr = ns_rendered_pos;
}
return (0);
}
@ -1148,7 +1208,7 @@ xmlC14NFreeCtx(xmlC14NCtxPtr ctx)
}
if (ctx->ns_rendered != NULL) {
xmlXPathFreeNodeSet(ctx->ns_rendered);
xmlC14NNamespacesDestroy(ctx->ns_rendered);
}
xmlFree(ctx);
}
@ -1226,6 +1286,7 @@ xmlC14NNewCtx(xmlDocPtr doc, xmlNodeSetPtr nodes,
ctx->buf = buf;
ctx->parent_is_doc = 1;
ctx->pos = XMLC14N_BEFORE_DOCUMENT_ELEMENT;
ctx->ns_rendered = xmlC14NNamespacesCreate();
/*
* Set "exclusive" flag, create a nodes set for namespaces
@ -1233,7 +1294,6 @@ xmlC14NNewCtx(xmlDocPtr doc, xmlNodeSetPtr nodes,
*/
if (exclusive) {
ctx->exclusive = 1;
ctx->ns_rendered = xmlXPathNodeSetCreate(NULL);
ctx->inclusive_ns_prefixes = inclusive_ns_prefixes;
}
return (ctx);

15
xpath.c
View File

@ -5200,6 +5200,15 @@ xmlXPathNextAncestor(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) {
return(att->parent);
}
case XML_NAMESPACE_DECL: {
xmlNsPtr ns = (xmlNsPtr) ctxt->context->node;
if ((ns->next != NULL) &&
(ns->next->type != XML_NAMESPACE_DECL))
return((xmlNodePtr) ns->next);
/* Bad, how did that namespace ended-up there ? */
return(NULL);
}
case XML_DOCUMENT_NODE:
case XML_DOCUMENT_TYPE_NODE:
case XML_DOCUMENT_FRAG_NODE:
@ -5208,12 +5217,6 @@ xmlXPathNextAncestor(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) {
case XML_DOCB_DOCUMENT_NODE:
#endif
return(NULL);
case XML_NAMESPACE_DECL:
/*
* this should not hapen a namespace can't be
* the ancestor of another node
*/
return(NULL);
}
return(NULL);
}