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New plugin callback: ca_yang_patch - for modifying existing YANG modules

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C-API: Added `spec` parameter to `xml2xpath()`
This commit is contained in:
Olof Hagsand 2023-02-05 11:09:06 +01:00
parent 48a0fb9968
commit a5220805b1
16 changed files with 318 additions and 193 deletions
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134
lib/src/clixon_xml_map.c
View file

@ -732,140 +732,6 @@ xml_non_config_data(cxobj *xt,
return retval;
}
/*! Given an XML node, build an xpath recursively to root, internal function
* @param[in] x XML object
* @param[in] nsc Namespace context
* @param[out] cb XPath string as cbuf.
* @retval 0 OK
* @retval -1 Error. eg XML malformed
*/
static int
xml2xpath1(cxobj *x,
cvec *nsc,
cbuf *cb)
{
int retval = -1;
cxobj *xp;
yang_stmt *y = NULL;
cvec *cvk = NULL; /* vector of index keys */
cg_var *cvi;
char *keyname;
cxobj *xkey;
cxobj *xb;
char *b;
enum rfc_6020 keyword;
char *prefix = NULL;
char *namespace;
if ((xp = xml_parent(x)) == NULL)
goto ok;
if (xml2xpath1(xp, nsc, cb) < 0)
goto done;
if (nsc){
if (xml2ns(x, xml_prefix(x), &namespace) < 0)
goto done;
if (namespace){
if (xml_nsctx_get_prefix(nsc, namespace, &prefix) == 0)
; /* maybe NULL? */
}
else
prefix = xml_prefix(x); /* maybe NULL? */
}
else
prefix = xml_prefix(x);
/* XXX: sometimes there should be a /, sometimes not */
cprintf(cb, "/");
if (prefix)
cprintf(cb, "%s:", prefix);
cprintf(cb, "%s", xml_name(x));
if ((y = xml_spec(x)) != NULL){
keyword = yang_keyword_get(y);
switch (keyword){
case Y_LEAF_LIST:
if ((b = xml_body(x)) != NULL)
cprintf(cb, "[.=\"%s\"]", b);
else
cprintf(cb, "[.=\"\"]");
break;
case Y_LIST:
cvk = yang_cvec_get(y);
cvi = NULL;
while ((cvi = cvec_each(cvk, cvi)) != NULL) {
keyname = cv_string_get(cvi);
if ((xkey = xml_find(x, keyname)) == NULL)
goto done; /* No key in xml */
if ((xb = xml_find(x, keyname)) == NULL)
goto done;
b = xml_body(xb);
cprintf(cb, "[");
if (prefix)
cprintf(cb, "%s:", prefix);
cprintf(cb, "%s=\"%s\"]", keyname, b?b:"");
}
break;
default:
break;
}
}
ok:
retval = 0;
done:
return retval;
}
/*! Given an XML node, build an xpath to root
*
* Creates an XPath from an XML node with some limitations, see notes below.
* The prefixes used are from the given namespace context if any, otherwise the native prefixes are used, if any.
* Note that this means that prefixes may be translated such as if the XML namespace mapping is different than the once used
* in the XML.
* Therefore, if nsc is "canonical", the returned xpath is also "canonical", even though the XML is not.
* @param[in] x XML object
* @param[in] nsc Namespace context
* @param[out] xpath Malloced xpath string. Need to free() after use
* @retval 0 OK
* @retval -1 Error. (eg XML malformed)
* @code
* char *xpath = NULL;
* cxobj *x;
* ... x is inside an xml tree ...
* if (xml2xpath(x, nsc, &xpath) < 0)
* err;
* free(xpath);
* @endcode
* @note x needs to be bound to YANG, see eg xml_bind_yang()
*/
int
xml2xpath(cxobj *x,
cvec *nsc,
char **xpathp)
{
int retval = -1;
cbuf *cb;
char *xpath = NULL;
if ((cb = cbuf_new()) == NULL){
clicon_err(OE_XML, errno, "cbuf_new");
goto done;
}
if (xml2xpath1(x, nsc, cb) < 0)
goto done;
/* XXX: see xpath in test statement,.. */
xpath = cbuf_get(cb);
if (xpathp){
if ((*xpathp = strdup(xpath)) == NULL){
clicon_err(OE_UNIX, errno, "strdup");
goto done;
}
xpath = NULL;
}
retval = 0;
done:
if (cb)
cbuf_free(cb);
return retval;
}
/*! Check if the module tree x is in is assigned right XML namespace, assign if not
* @param[in] x XML node
*(0. You should probably find the XML root and apply this function to that.)