[COMMITTED] Convert strcmp benchmark output to json format

diff --git a/ChangeLog b/ChangeLog
index 3ae1fd2..99792bf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@ 
 2017-12-14  Siddhesh Poyarekar  <siddhesh@sourceware.org>
 
+	* benchtests/bench-strcmp.c: Print output in JSON format.
+
 	* elf/dl-tunables.list: Remove redundant SXID_ERASE.
 
 2017-12-14  Florian Weimer  <fweimer@redhat.com>
diff --git a/benchtests/bench-strcmp.c b/benchtests/bench-strcmp.c
index 1fd0d1e..bd92b29 100644
--- a/benchtests/bench-strcmp.c
+++ b/benchtests/bench-strcmp.c
@@ -127,6 +127,8 @@  stupid_strcmp (const char *s1, const char *s2)
 }
 #endif
 
+# include "json-lib.h"
+
 typedef int (*proto_t) (const CHAR *, const CHAR *);
 
 IMPL (STUPID_STRCMP, 1)
@@ -134,7 +136,7 @@  IMPL (SIMPLE_STRCMP, 1)
 IMPL (STRCMP, 1)
 
 static void
-do_one_test (impl_t *impl,
+do_one_test (json_ctx_t *json_ctx, impl_t *impl,
 	     const CHAR *s1, const CHAR *s2,
 	     int exp_result)
 {
@@ -150,12 +152,12 @@  do_one_test (impl_t *impl,
 
   TIMING_DIFF (cur, start, stop);
 
-  TIMING_PRINT_MEAN ((double) cur, (double) iters);
+  json_element_double (json_ctx, (double) cur / (double) iters);
 }
 
 static void
-do_test (size_t align1, size_t align2, size_t len, int max_char,
-	 int exp_result)
+do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len, int
+	 max_char, int exp_result)
 {
   size_t i;
 
@@ -186,55 +188,77 @@  do_test (size_t align1, size_t align2, size_t len, int max_char,
   s2[len + 1] = 24 + exp_result;
   s2[len - 1] -= exp_result;
 
-  printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
+  json_element_object_begin (json_ctx);
+  json_attr_uint (json_ctx, "length", (double) len);
+  json_attr_uint (json_ctx, "align1", (double) align1);
+  json_attr_uint (json_ctx, "align2", (double) align2);
+  json_array_begin (json_ctx, "timings");
 
   FOR_EACH_IMPL (impl, 0)
-    do_one_test (impl, s1, s2, exp_result);
+    do_one_test (json_ctx, impl, s1, s2, exp_result);
 
-  putchar ('\n');
+  json_array_end (json_ctx);
+  json_element_object_end (json_ctx);
 }
 
 int
 test_main (void)
 {
+  json_ctx_t json_ctx;
   size_t i;
 
   test_init ();
 
-  printf ("%23s", "");
+  json_init (&json_ctx, 0, stdout);
+
+  json_document_begin (&json_ctx);
+  json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
+
+  json_attr_object_begin (&json_ctx, "functions");
+  json_attr_object_begin (&json_ctx, TEST_NAME);
+  json_attr_string (&json_ctx, "bench-variant", "default");
+
+  json_array_begin (&json_ctx, "ifuncs");
   FOR_EACH_IMPL (impl, 0)
-    printf ("\t%s", impl->name);
-  putchar ('\n');
+    json_element_string (&json_ctx, impl->name);
+  json_array_end (&json_ctx);
+
+  json_array_begin (&json_ctx, "results");
 
   for (i = 1; i < 32; ++i)
     {
-      do_test (CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 0);
-      do_test (CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 1);
-      do_test (CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, -1);
+      do_test (&json_ctx, CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 0);
+      do_test (&json_ctx, CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 1);
+      do_test (&json_ctx, CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, -1);
     }
 
   for (i = 1; i < 10 + CHARBYTESLOG; ++i)
     {
-      do_test (0, 0, 2 << i, MIDCHAR, 0);
-      do_test (0, 0, 2 << i, LARGECHAR, 0);
-      do_test (0, 0, 2 << i, MIDCHAR, 1);
-      do_test (0, 0, 2 << i, LARGECHAR, 1);
-      do_test (0, 0, 2 << i, MIDCHAR, -1);
-      do_test (0, 0, 2 << i, LARGECHAR, -1);
-      do_test (0, CHARBYTES * i, 2 << i, MIDCHAR, 1);
-      do_test (CHARBYTES * i, CHARBYTES * (i + 1), 2 << i, LARGECHAR, 1);
+      do_test (&json_ctx, 0, 0, 2 << i, MIDCHAR, 0);
+      do_test (&json_ctx, 0, 0, 2 << i, LARGECHAR, 0);
+      do_test (&json_ctx, 0, 0, 2 << i, MIDCHAR, 1);
+      do_test (&json_ctx, 0, 0, 2 << i, LARGECHAR, 1);
+      do_test (&json_ctx, 0, 0, 2 << i, MIDCHAR, -1);
+      do_test (&json_ctx, 0, 0, 2 << i, LARGECHAR, -1);
+      do_test (&json_ctx, 0, CHARBYTES * i, 2 << i, MIDCHAR, 1);
+      do_test (&json_ctx, CHARBYTES * i, CHARBYTES * (i + 1), 2 << i, LARGECHAR, 1);
     }
 
   for (i = 1; i < 8; ++i)
     {
-      do_test (CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, 0);
-      do_test (2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, 0);
-      do_test (CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, 1);
-      do_test (2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, 1);
-      do_test (CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, -1);
-      do_test (2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, -1);
+      do_test (&json_ctx, CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, 0);
+      do_test (&json_ctx, 2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, 0);
+      do_test (&json_ctx, CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, 1);
+      do_test (&json_ctx, 2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, 1);
+      do_test (&json_ctx, CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, -1);
+      do_test (&json_ctx, 2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, -1);
     }
 
+  json_array_end (&json_ctx);
+  json_attr_object_end (&json_ctx);
+  json_attr_object_end (&json_ctx);
+  json_document_end (&json_ctx);
+
   return ret;
 }