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Preserve context node when doing XPath queries to allow relative XPath expressions

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This commit is contained in:
Daniel P. Berrange 2008-07-09 08:35:09 +00:00
parent 1e3e8d147a
commit b897973f2e
2 changed files with 27 additions and 1 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Wed Jul 9 09:19:31 BST 2008 Daniel P. Berrange <berrange@redhat.com>
* src/xml.c: Preserve the XPath context node to allow relative
XPath queries to be used
Wed Jul 9 07:23:31 CEST 2008 Jim Meyering <meyering@redhat.com>
give a more useful diagnostic for tap-add failure w/ENOTSUP

23
src/xml.c
View File

@ -386,6 +386,7 @@ char *
virXPathString(const char *xpath, xmlXPathContextPtr ctxt)
{
xmlXPathObjectPtr obj;
xmlNodePtr relnode;
char *ret;
if ((ctxt == NULL) || (xpath == NULL)) {
@ -393,6 +394,7 @@ virXPathString(const char *xpath, xmlXPathContextPtr ctxt)
_("Invalid parameter to virXPathString()"), 0);
return (NULL);
}
relnode = ctxt->node;
obj = xmlXPathEval(BAD_CAST xpath, ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
@ -404,6 +406,7 @@ virXPathString(const char *xpath, xmlXPathContextPtr ctxt)
if (ret == NULL) {
virXMLError(NULL, VIR_ERR_NO_MEMORY, _("strdup failed"), 0);
}
ctxt->node = relnode;
return (ret);
}
@ -422,21 +425,25 @@ int
virXPathNumber(const char *xpath, xmlXPathContextPtr ctxt, double *value)
{
xmlXPathObjectPtr obj;
xmlNodePtr relnode;
if ((ctxt == NULL) || (xpath == NULL) || (value == NULL)) {
virXMLError(NULL, VIR_ERR_INTERNAL_ERROR,
_("Invalid parameter to virXPathNumber()"), 0);
return (-1);
}
relnode = ctxt->node;
obj = xmlXPathEval(BAD_CAST xpath, ctxt);
if ((obj == NULL) || (obj->type != XPATH_NUMBER) ||
(isnan(obj->floatval))) {
xmlXPathFreeObject(obj);
ctxt->node = relnode;
return (-1);
}
*value = obj->floatval;
xmlXPathFreeObject(obj);
ctxt->node = relnode;
return (0);
}
@ -456,6 +463,7 @@ int
virXPathLong(const char *xpath, xmlXPathContextPtr ctxt, long *value)
{
xmlXPathObjectPtr obj;
xmlNodePtr relnode;
int ret = 0;
if ((ctxt == NULL) || (xpath == NULL) || (value == NULL)) {
@ -463,6 +471,7 @@ virXPathLong(const char *xpath, xmlXPathContextPtr ctxt, long *value)
_("Invalid parameter to virXPathNumber()"), 0);
return (-1);
}
relnode = ctxt->node;
obj = xmlXPathEval(BAD_CAST xpath, ctxt);
if ((obj != NULL) && (obj->type == XPATH_STRING) &&
(obj->stringval != NULL) && (obj->stringval[0] != 0)) {
@ -486,6 +495,7 @@ virXPathLong(const char *xpath, xmlXPathContextPtr ctxt, long *value)
}
xmlXPathFreeObject(obj);
ctxt->node = relnode;
return (ret);
}
@ -502,6 +512,7 @@ int
virXPathBoolean(const char *xpath, xmlXPathContextPtr ctxt)
{
xmlXPathObjectPtr obj;
xmlNodePtr relnode;
int ret;
if ((ctxt == NULL) || (xpath == NULL)) {
@ -509,6 +520,7 @@ virXPathBoolean(const char *xpath, xmlXPathContextPtr ctxt)
_("Invalid parameter to virXPathBoolean()"), 0);
return (-1);
}
relnode = ctxt->node;
obj = xmlXPathEval(BAD_CAST xpath, ctxt);
if ((obj == NULL) || (obj->type != XPATH_BOOLEAN) ||
(obj->boolval < 0) || (obj->boolval > 1)) {
@ -518,6 +530,7 @@ virXPathBoolean(const char *xpath, xmlXPathContextPtr ctxt)
ret = obj->boolval;
xmlXPathFreeObject(obj);
ctxt->node = relnode;
return (ret);
}
@ -535,6 +548,7 @@ xmlNodePtr
virXPathNode(const char *xpath, xmlXPathContextPtr ctxt)
{
xmlXPathObjectPtr obj;
xmlNodePtr relnode;
xmlNodePtr ret;
if ((ctxt == NULL) || (xpath == NULL)) {
@ -542,16 +556,19 @@ virXPathNode(const char *xpath, xmlXPathContextPtr ctxt)
_("Invalid parameter to virXPathNode()"), 0);
return (NULL);
}
relnode = ctxt->node;
obj = xmlXPathEval(BAD_CAST xpath, ctxt);
if ((obj == NULL) || (obj->type != XPATH_NODESET) ||
(obj->nodesetval == NULL) || (obj->nodesetval->nodeNr <= 0) ||
(obj->nodesetval->nodeTab == NULL)) {
xmlXPathFreeObject(obj);
ctxt->node = relnode;
return (NULL);
}
ret = obj->nodesetval->nodeTab[0];
xmlXPathFreeObject(obj);
ctxt->node = relnode;
return (ret);
}
@ -571,6 +588,7 @@ virXPathNodeSet(const char *xpath, xmlXPathContextPtr ctxt,
xmlNodePtr ** list)
{
xmlXPathObjectPtr obj;
xmlNodePtr relnode;
int ret;
if ((ctxt == NULL) || (xpath == NULL)) {
@ -578,6 +596,7 @@ virXPathNodeSet(const char *xpath, xmlXPathContextPtr ctxt,
_("Invalid parameter to virXPathNodeSet()"), 0);
return (-1);
}
relnode = ctxt->node;
obj = xmlXPathEval(BAD_CAST xpath, ctxt);
if ((obj == NULL) || (obj->type != XPATH_NODESET) ||
(obj->nodesetval == NULL) || (obj->nodesetval->nodeNr <= 0) ||
@ -585,6 +604,7 @@ virXPathNodeSet(const char *xpath, xmlXPathContextPtr ctxt,
xmlXPathFreeObject(obj);
if (list != NULL)
*list = NULL;
ctxt->node = relnode;
return (-1);
}
@ -601,6 +621,7 @@ virXPathNodeSet(const char *xpath, xmlXPathContextPtr ctxt,
}
}
xmlXPathFreeObject(obj);
ctxt->node = relnode;
return (ret);
}
@ -1139,7 +1160,7 @@ virDomainParseXMLOSDescHVM(virConnectPtr conn, xmlNodePtr node,
goto error;
virBufferVSprintf(buf, "(serial %s)", scratch);
} else {
res = virXPathBoolean("count(domain/devices/console) > 0", ctxt);
res = virXPathBoolean("count(/domain/devices/console) > 0", ctxt);
if (res < 0) {
virXMLError(conn, VIR_ERR_XML_ERROR, NULL, 0);
goto error;