docs: Fix man entry for "changes" operator.

[whenjobs.git] / lib / whenutils.ml

diff --git a/lib/whenutils.ml b/lib/whenutils.ml
index ca26755..79a653f 100644 (file)
--- a/lib/whenutils.ml
+++ b/lib/whenutils.ml
@@ -63,3 +63,13 @@ let string_of_time_t ?(localtime = false) t =
     (1900+tm.tm_year) (1+tm.tm_mon) tm.tm_mday
     tm.tm_hour tm.tm_min tm.tm_sec
     (if localtime then "" else " UTC")
+
+let string_startswith str prefix =
+  let len = String.length str in
+  let plen = String.length prefix in
+  len >= plen && String.sub str 0 plen = prefix
+
+let string_endswith str suffix =
+  let len = String.length str in
+  let slen = String.length suffix in
+  len >= slen && String.sub str (len-slen) slen = suffix