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Add virXPathLongHex() and virXPathULongHex()
Add new functions to allow parsing integers with base 16 This will be used to e.g. parse PCI vendor IDs.
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14480f699d
commit
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@ -1,3 +1,7 @@
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Tue Feb 24 14:52:44 GMT 2009 Mark McLoughlin <markmc@redhat.com>
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* src/xml.[ch]: Add virXPathLongHex() and virXPathULongHex()
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Tue Feb 24 14:51:32 GMT 2009 Mark McLoughlin <markmc@redhat.com>
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* docs/formatdomain.html: fix a typo in hostdev docs
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138
src/xml.c
138
src/xml.c
@ -116,6 +116,50 @@ virXPathNumber(virConnectPtr conn,
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return (0);
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}
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static int
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virXPathLongBase(virConnectPtr conn,
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const char *xpath,
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xmlXPathContextPtr ctxt,
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int base,
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long *value)
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{
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xmlXPathObjectPtr obj;
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xmlNodePtr relnode;
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int ret = 0;
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if ((ctxt == NULL) || (xpath == NULL) || (value == NULL)) {
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virXMLError(conn, VIR_ERR_INTERNAL_ERROR,
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"%s", _("Invalid parameter to virXPathLong()"));
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return (-1);
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}
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relnode = ctxt->node;
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obj = xmlXPathEval(BAD_CAST xpath, ctxt);
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if ((obj != NULL) && (obj->type == XPATH_STRING) &&
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(obj->stringval != NULL) && (obj->stringval[0] != 0)) {
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char *conv = NULL;
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long val;
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val = strtol((const char *) obj->stringval, &conv, base);
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if (conv == (const char *) obj->stringval) {
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ret = -2;
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} else {
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*value = val;
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}
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} else if ((obj != NULL) && (obj->type == XPATH_NUMBER) &&
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(!(isnan(obj->floatval)))) {
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*value = (long) obj->floatval;
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if (*value != obj->floatval) {
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ret = -2;
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}
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} else {
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ret = -1;
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}
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xmlXPathFreeObject(obj);
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ctxt->node = relnode;
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return (ret);
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}
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/**
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* virXPathLong:
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* @xpath: the XPath string to evaluate
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@ -133,6 +177,38 @@ virXPathLong(virConnectPtr conn,
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const char *xpath,
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xmlXPathContextPtr ctxt,
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long *value)
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{
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return virXPathLongBase(conn, xpath, ctxt, 10, value);
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}
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/**
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* virXPathLongHex:
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* @xpath: the XPath string to evaluate
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* @ctxt: an XPath context
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* @value: the returned long value
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*
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* Convenience function to evaluate an XPath number
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* according to a base of 16
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*
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* Returns 0 in case of success in which case @value is set,
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* or -1 if the XPath evaluation failed or -2 if the
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* value doesn't have a long format.
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*/
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int
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virXPathLongHex(virConnectPtr conn,
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const char *xpath,
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xmlXPathContextPtr ctxt,
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long *value)
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{
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return virXPathLongBase(conn, xpath, ctxt, 16, value);
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}
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static int
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virXPathULongBase(virConnectPtr conn,
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const char *xpath,
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xmlXPathContextPtr ctxt,
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int base,
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unsigned long *value)
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{
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xmlXPathObjectPtr obj;
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xmlNodePtr relnode;
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@ -140,7 +216,7 @@ virXPathLong(virConnectPtr conn,
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if ((ctxt == NULL) || (xpath == NULL) || (value == NULL)) {
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virXMLError(conn, VIR_ERR_INTERNAL_ERROR,
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"%s", _("Invalid parameter to virXPathLong()"));
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"%s", _("Invalid parameter to virXPathULong()"));
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return (-1);
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}
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relnode = ctxt->node;
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@ -150,7 +226,7 @@ virXPathLong(virConnectPtr conn,
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char *conv = NULL;
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long val;
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val = strtol((const char *) obj->stringval, &conv, 10);
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val = strtoul((const char *) obj->stringval, &conv, base);
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if (conv == (const char *) obj->stringval) {
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ret = -2;
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} else {
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@ -158,7 +234,7 @@ virXPathLong(virConnectPtr conn,
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}
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} else if ((obj != NULL) && (obj->type == XPATH_NUMBER) &&
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(!(isnan(obj->floatval)))) {
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*value = (long) obj->floatval;
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*value = (unsigned long) obj->floatval;
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if (*value != obj->floatval) {
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ret = -2;
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}
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@ -189,41 +265,29 @@ virXPathULong(virConnectPtr conn,
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xmlXPathContextPtr ctxt,
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unsigned long *value)
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{
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xmlXPathObjectPtr obj;
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xmlNodePtr relnode;
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int ret = 0;
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return virXPathULongBase(conn, xpath, ctxt, 10, value);
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}
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if ((ctxt == NULL) || (xpath == NULL) || (value == NULL)) {
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virXMLError(conn, VIR_ERR_INTERNAL_ERROR,
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"%s", _("Invalid parameter to virXPathULong()"));
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return (-1);
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}
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relnode = ctxt->node;
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obj = xmlXPathEval(BAD_CAST xpath, ctxt);
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if ((obj != NULL) && (obj->type == XPATH_STRING) &&
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(obj->stringval != NULL) && (obj->stringval[0] != 0)) {
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char *conv = NULL;
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long val;
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val = strtoul((const char *) obj->stringval, &conv, 10);
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if (conv == (const char *) obj->stringval) {
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ret = -2;
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} else {
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*value = val;
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}
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} else if ((obj != NULL) && (obj->type == XPATH_NUMBER) &&
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(!(isnan(obj->floatval)))) {
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*value = (unsigned long) obj->floatval;
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if (*value != obj->floatval) {
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ret = -2;
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}
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} else {
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ret = -1;
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}
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xmlXPathFreeObject(obj);
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ctxt->node = relnode;
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return (ret);
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/**
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* virXPathUHex:
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* @xpath: the XPath string to evaluate
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* @ctxt: an XPath context
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* @value: the returned long value
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*
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* Convenience function to evaluate an XPath number
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* according to base of 16
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*
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* Returns 0 in case of success in which case @value is set,
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* or -1 if the XPath evaluation failed or -2 if the
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* value doesn't have a long format.
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*/
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int
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virXPathULongHex(virConnectPtr conn,
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const char *xpath,
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xmlXPathContextPtr ctxt,
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unsigned long *value)
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{
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return virXPathULongBase(conn, xpath, ctxt, 16, value);
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}
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char *
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@ -29,6 +29,14 @@ int virXPathULong (virConnectPtr conn,
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const char *xpath,
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xmlXPathContextPtr ctxt,
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unsigned long *value);
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int virXPathLongHex (virConnectPtr conn,
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const char *xpath,
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xmlXPathContextPtr ctxt,
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long *value);
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int virXPathULongHex(virConnectPtr conn,
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const char *xpath,
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xmlXPathContextPtr ctxt,
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unsigned long *value);
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xmlNodePtr virXPathNode (virConnectPtr conn,
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const char *xpath,
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xmlXPathContextPtr ctxt);
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