add code

8to7.d

@@ -0,0 +1,36 @@
+module main;
+import std.stdio;
+import std.uni : isWhite;
+import std.string : strip, empty;
+import std.array;
+import std.format.read : formattedRead;
+
+void main() {
+    ubyte b;
+    while(!stdin.eof()) {
+        string line = strip(readln());
+        if (line.empty) { return; }
+
+        auto pieces = line.split!isWhite;
+
+        foreach (string p; pieces) {
+            if (1 == formattedRead(p, "%x", &b)) {
+                writef("%02x ", b & 0x7F);
+            }
+        }
+        write("  ");
+
+        foreach (string p; pieces) {
+            if (1 == formattedRead(p, "%x", &b)) {
+                b = b & 0x7F;
+                if (b < 32 || b >= 127) {
+                    write(".");
+                } else {
+                    writef("%s", cast(char)b);
+                }
+            }
+        }
+
+        writeln();
+    }
+}