Replace index_in_[sub]str_array with index_in_[sub]strings,

which scans thru "abc\0def\0123\0\0" type strings. Saves 250 bytes.

   text    data     bss     dec     hex filename
 781266    1328   11844  794438   c1f46 busybox_old
 781010    1328   11844  794182   c1e46 busybox_unstripped

1 files changed, 3 insertions, 4 deletions

diff --git a/coreutils/expr.c b/coreutils/expr.c
index ab182a804..6a4683d90 100644
--- a/coreutils/expr.c
+++ b/coreutils/expr.c
@@ -277,14 +277,13 @@ static VALUE *eval7(void)
 
 static VALUE *eval6(void)
 {
-        static const char * const keywords[] = {
-                "quote", "length", "match", "index", "substr", NULL
-        };
+        static const char keywords[] =
+                "quote\0""length\0""match\0""index\0""substr\0";
 
         VALUE *r, *i1, *i2;
         VALUE *l = l; /* silence gcc */
         VALUE *v = v; /* silence gcc */
-        int key = *G.args ? index_in_str_array(keywords, *G.args) + 1 : 0;
+        int key = *G.args ? index_in_strings(keywords, *G.args) + 1 : 0;
 
         if (key == 0) /* not a keyword */
                 return eval7();