2 files changed, 21 insertions, 0 deletions
diff --git a/lib/warnless.c b/lib/warnless.c
index 778f098f5..8c130d34c 100644
--- a/lib/warnless.c
+++ b/lib/warnless.c
@@ -175,6 +175,25 @@ int curlx_ultosi(unsigned long ulnum)
 }
 
 /*
+** unsigned size_t to signed curl_off_t
+*/
+
+curl_off_t curlx_uztoso(size_t uznum)
+{
+#ifdef __INTEL_COMPILER
+#  pragma warning(push)
+#  pragma warning(disable:810) /* conversion may lose significant bits */
+#endif
+
+  DEBUGASSERT(uznum <= (size_t) CURL_MASK_SCOFFT);
+  return (curl_off_t)(uznum & (size_t) CURL_MASK_SCOFFT);
+
+#ifdef __INTEL_COMPILER
+#  pragma warning(pop)
+#endif
+}
+
+/*
 ** unsigned size_t to signed int
 */
 
diff --git a/lib/warnless.h b/lib/warnless.h
index 33368d207..ad77d3c20 100644
--- a/lib/warnless.h
+++ b/lib/warnless.h
@@ -34,6 +34,8 @@ int curlx_ultosi(unsigned long ulnum);
 
 int curlx_uztosi(size_t uznum);
 
+curl_off_t curlx_uztoso(size_t uznum);
+
 unsigned long curlx_uztoul(size_t uznum);
 
 unsigned int curlx_uztoui(size_t uznum);