From f2fa90d0430e2dbf7dffd0e1704b586890ccbb40 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Thu, 28 Dec 2017 17:49:58 +1100
Subject: [PATCH] io: return views from write wrappers

---
 io.hpp | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/io.hpp b/io.hpp
index 8582748b..4ed8a543 100644
--- a/io.hpp
+++ b/io.hpp
@@ -49,7 +49,7 @@ namespace util {
 
     //-------------------------------------------------------------------------
     inline void
-    write (const posix::fd &dst, util::view<const char*> data)
+    write (const posix::fd &dst, util::view<const uint8_t*> data)
     {
         write (dst, std::data (data), std::size (data));
     }
@@ -74,12 +74,13 @@ namespace util {
     /// in this event the progress may not be reported to the caller. in the
     /// future an exception member variable may expose the information.
     template <typename DstT, typename IteratorA, typename IteratorB>
-    void
-    write (DstT &dst, util::view<IteratorA, IteratorB> src)
+    util::view<IteratorA,IteratorB>
+    write (DstT &dst, const util::view<IteratorA, IteratorB> src)
     {
-        for (auto cursor = src.begin (); cursor != src.end (); ) {
-            cursor = dst.write (view{cursor, src.end ()});
-        }
+        auto remain = src;
+        while (!remain.empty ())
+            remain = src - dst.write (remain);
+        return src;
     }