From 709ab00e4404970760a4d6398b35e309639ec58e Mon Sep 17 00:00:00 2001
From: Ferdinand Majerech <kiithsacmp@gmail.com>
Date: Tue, 29 Jul 2014 02:58:04 +0200
Subject: [PATCH] A UTF-8 slice().

---
 source/dyaml/reader.d | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/source/dyaml/reader.d b/source/dyaml/reader.d
index 2a272e4..e8f09a4 100644
--- a/source/dyaml/reader.d
+++ b/source/dyaml/reader.d
@@ -220,6 +220,26 @@ final class Reader
 
             return buffer_[start .. end];
         }
+        char[] slice8(const size_t end) @safe pure nothrow @nogc
+        {
+            // Fast path in case the caller has already peek()ed all the way to end.
+            if(end == lastDecodedCharOffset_)
+            {
+                return buffer8_[bufferOffset8_ .. lastDecodedBufferOffset_];
+            }
+
+            lastDecodedCharOffset_   = 0;
+            lastDecodedBufferOffset_ = bufferOffset8_;
+
+            // 'Slow' path - decode everything up to end.
+            while(lastDecodedCharOffset_ < end &&
+                  lastDecodedBufferOffset_ < buffer8_.length)
+            {
+                decodeNext();
+            }
+
+            return buffer8_[bufferOffset8_ .. lastDecodedBufferOffset_];
+        }
 
         /// Get the next character, moving buffer position beyond it.
         ///