benchtests: Clean up the alloc_bufs

Drop realloc_bufs in favour of making alloc_bufs transparently
reallocate the buffers if it had allocated before.  Also consolidate
computation of buffer lengths so that they don't get repeated on every
reallocation.

	* benchtests/bench-string.h (buf1_size, buf2_size): New
	variables.
	(init_sizes): New function.
	(test_init): Use it.
	(alloc_buf, exit_error): New functions.
	(alloc_bufs): Use ALLOC_BUF.
	(realloc_bufs): Remove.
	* benchtests/bench-memcmp.c (do_test): Adjust.
	* benchtests/bench-memset-large.c (do_test): Likewise.
	* benchtests/bench-memset-walk.c (do_test): Likewise.
	* benchtests/bench-memset.c (do_test): Likewise.
	* benchtests/bench-strncmp.c (do_test): Likewise.

1 files changed, 1 insertions, 1 deletions

diff --git a/benchtests/bench-memcmp.c b/benchtests/bench-memcmp.c
index 69ed9c958b..b566f48ae9 100644
--- a/benchtests/bench-memcmp.c
+++ b/benchtests/bench-memcmp.c
@@ -132,7 +132,7 @@ do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len,
       s2[len - 1] -= exp_result;
 
       do_one_test (json_ctx, impl, s1, s2, len, exp_result);
-      realloc_bufs ();
+      alloc_bufs ();
     }
 
   json_array_end (json_ctx);