add hexdump.nas

test/hexdump.nas

@@ -0,0 +1,25 @@
+import("lib.nas");
+
+var hex_num=[
+    '0','1','2','3',
+    '4','5','6','7',
+    '8','9','a','b',
+    'c','d','e','f'
+];
+var hex=[];
+foreach(var i;hex_num)
+    foreach(var j;hex_num)
+        append(hex,'0x'~i~j);
+var s=io.fin("lib.nas");
+
+var cnt=0;
+print(0,'\t');
+for(var i=0;i<size(s);i+=1){
+    if(cnt==8){
+        cnt=0;
+        print('\n',i,'\t');
+    }
+    cnt+=1;
+    print(hex[s[i]],' ');
+}
+print('\n');