diff options
| -rw-r--r-- | lib/yang.c | 24 | ||||
| -rw-r--r-- | lib/yang.h | 15 |
2 files changed, 39 insertions, 0 deletions
diff --git a/lib/yang.c b/lib/yang.c index 7d35fb0d3d..ed855c8498 100644 --- a/lib/yang.c +++ b/lib/yang.c @@ -508,6 +508,30 @@ void yang_dnode_iterate(yang_dnode_iter_cb cb, void *arg, ly_set_free(set, NULL); } +uint32_t yang_dnode_count(const struct lyd_node *dnode, const char *xpath_fmt, + ...) +{ + va_list ap; + char xpath[XPATH_MAXLEN]; + struct ly_set *set; + uint32_t count; + + va_start(ap, xpath_fmt); + vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap); + va_end(ap); + + if (lyd_find_xpath(dnode, xpath, &set)) { + assert(0); + return 0; + } + + count = set->count; + + ly_set_free(set, NULL); + + return count; +} + bool yang_dnode_is_default(const struct lyd_node *dnode, const char *xpath) { const struct lysc_node *snode; diff --git a/lib/yang.h b/lib/yang.h index dbb7f7163b..1235125f26 100644 --- a/lib/yang.h +++ b/lib/yang.h @@ -421,6 +421,21 @@ void yang_dnode_iterate(yang_dnode_iter_cb cb, void *arg, ...) PRINTFRR(4, 5); /* + * Count the number of data nodes that satisfy an XPath query. + * + * dnode + * Base libyang data node to operate on. + * + * xpath_fmt + * XPath expression (absolute or relative). + * + * ... + * any parameters for xpath_fmt. + */ +uint32_t yang_dnode_count(const struct lyd_node *dnode, const char *xpath_fmt, + ...) PRINTFRR(2, 3); + +/* * Check if the libyang data node contains a default value. Non-presence * containers are assumed to always contain a default value. * |