Allow user to specify multiple algorithms to nettle-benchmark

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>

examples/nettle-benchmark.c

@@ -809,7 +809,7 @@ main(int argc, char **argv)
 	  break;
 
       case OPT_HELP:
-	printf("Usage: nettle-benchmark [-f clock frequency] [alg]\n");
+	printf("Usage: nettle-benchmark [-f clock frequency] [alg...]\n");
 	return EXIT_SUCCESS;
 
       case '?':
@@ -819,8 +819,6 @@ main(int argc, char **argv)
 	abort();
     }
 
-  alg = argv[optind];
-
   time_init();
   bench_sha1_compress();
   bench_salsa20_core();
@@ -830,6 +828,10 @@ main(int argc, char **argv)
 
   header();
 
+  do
+    {
+      alg = argv[optind];
+
       if (!alg || strstr ("memxor", alg))
 	{
 	  time_memxor();
@@ -854,5 +856,8 @@ main(int argc, char **argv)
 	if (!alg || strstr(aeads[i]->name, alg))
 	  time_aead(aeads[i]);
 
+      optind++;
+    } while (alg && argv[optind]);
+
   return 0;
 }