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Added support for the XPATH function bit-is-set()

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This commit is contained in:
Olof hagsand 2021-11-27 15:38:13 +01:00
parent ee5c0a08d5
commit bc1f80b28e
5 changed files with 97 additions and 2 deletions
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74
lib/src/clixon_xpath_function.c
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@ -379,6 +379,80 @@ xp_function_derived_from(xp_ctx *xc,
return retval;
}
/*! Returns true if the first node value has a bit set
*
* The bit-is-set() function returns "true" if the first node in
* document order in the argument "nodes" is a node of type "bits" and
* its value has the bit "bit-name" set; otherwise, it returns "false".
*
* Signature: boolean bit-is-set(node-set nodes, string bit-name)
* @param[in] xc Incoming context
* @param[in] xs XPATH node tree
* @param[in] nsc XML Namespace context
* @param[in] localonly Skip prefix and namespace tests (non-standard)
* @param[out] xrp Resulting context
* @retval 0 OK
* @retval -1 Error
* Example: interface[bit-is-set(flags, 'UP')
* @see RFC 7950 Sec 10.6
* typecheck is not made but assume this is done by validate
* XXX: lacks proper parsing of bits, just use strstr, see eg cv_validate1
*/
int
xp_function_bit_is_set(xp_ctx *xc,
struct xpath_tree *xs,
cvec *nsc,
int localonly,
xp_ctx **xrp)
{
int retval = -1;
xp_ctx *xr = NULL;
xp_ctx *xr0 = NULL;
xp_ctx *xr1 = NULL;
char *s1 = NULL;
cxobj *x;
char *body;
if (xs == NULL || xs->xs_c0 == NULL || xs->xs_c1 == NULL){
clicon_err(OE_XML, EINVAL, "contains expects but did not get two arguments");
goto done;
}
/* First node-set argument */
if (xp_eval(xc, xs->xs_c0, nsc, localonly, &xr0) < 0)
goto done;
/* Second string argument */
if (xp_eval(xc, xs->xs_c1, nsc, localonly, &xr1) < 0)
goto done;
if (ctx2string(xr1, &s1) < 0)
goto done;
if ((xr = malloc(sizeof(*xr))) == NULL){
clicon_err(OE_UNIX, errno, "malloc");
goto done;
}
memset(xr, 0, sizeof(*xr));
xr->xc_type = XT_BOOL;
/* The first node in document order in the argument "nodes"
* is a node of type "bits") and # NOT IMPLEMENTED
* its value has the bit "bit-name" set
*/
if (xr0->xc_size &&
(x = xr0->xc_nodeset[0]) != NULL &&
(body = xml_body(x)) != NULL){
xr->xc_bool = strstr(body, s1) != NULL;
}
*xrp = xr;
retval = 0;
done:
if (xr0)
ctx_free(xr0);
if (xr1)
ctx_free(xr1);
if (s1)
free(s1);
return retval;
}
/*! Return a number equal to the context position from the expression evaluation context.
*
* Signature: number position(node-set)