[Libguestfs] [PATCH v9 5/7] mllib: add XPath helper xpath_get_nodes()

Cédric Bosdonnat
2017-09-18T15:53:50Z

This function will allow more OCaml-ish processing of XPath queries
with multiple results.
---
 mllib/xpath_helpers.ml  | 9 +++++++++
 mllib/xpath_helpers.mli | 4 ++++
 2 files changed, 13 insertions(+)

diff --git a/mllib/xpath_helpers.ml b/mllib/xpath_helpers.ml
index e6185bf3d..eb655e1fe 100644
--- a/mllib/xpath_helpers.ml
+++ b/mllib/xpath_helpers.ml
@@ -52,3 +52,12 @@ let xpath_eval_default parsefn xpath expr default  let
xpath_string_default = xpath_eval_default identity
 let xpath_int_default = xpath_eval_default int_of_string
 let xpath_int64_default = xpath_eval_default Int64.of_string
+
+let xpath_get_nodes xpathctx expr +  let obj = Xml.xpath_eval_expression
xpathctx expr in
+  let nodes = ref [] in
+  for i = 0 to Xml.xpathobj_nr_nodes obj - 1 do
+    let node = Xml.xpathobj_node obj i in
+    push_back nodes node
+  done;
+  !nodes
diff --git a/mllib/xpath_helpers.mli b/mllib/xpath_helpers.mli
index 7434ba645..83c770281 100644
--- a/mllib/xpath_helpers.mli
+++ b/mllib/xpath_helpers.mli
@@ -31,3 +31,7 @@ val xpath_int_default : Xml.xpathctx -> string -> int
-> int
 val xpath_int64_default : Xml.xpathctx -> string -> int64 -> int64
 (** Parse an xpath expression and return a string/int; if the expression
     doesn't match, return the default. *)
+
+val xpath_get_nodes : Xml.xpathctx -> string -> Xml.node list
+(** Parse an XPath expression and return a list with the matching
+    XML nodes. *)
--
2.13.2