Merge: lib/core: Added new `hexdigest` service on `Text`

Title says all, I needed this today to debug trailing zeroes in a produced string and I figured it could be PR'd

Pull-Request: #1774
Reviewed-by: Jean Privat <jean@pryen.org>
Reviewed-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/core/bytes.nit b/lib/core/bytes.nit
index 227759a..94d3d27 100644 (file)
--- a/lib/core/bytes.nit
+++ b/lib/core/bytes.nit
@@ -289,6 +289,20 @@ redef class Text
                end
                return ret
        end
+
+       # Gets the hexdigest of the bytes of `self`
+       #
+       #     assert "<STRING/&rt;".hexdigest == "266C743B535452494E47262334373B2672743B"
+       fun hexdigest: String do
+               var ln = bytelen
+               var outns = new NativeString(ln * 2)
+               var oi = 0
+               for i in [0 .. ln[ do
+                       bytes[i].add_digest_at(outns, oi)
+                       oi += 2
+               end
+               return new FlatString.with_infos(outns, ln * 2, 0, ln * 2 - 1)
+       end
 end
 
 redef class FlatText