Tag various character arrays with NXT_NONSTRING

In Unit we have a number of character arrays which are intentionally not
NUL terminated.

With GCC 15 this

  static const char hex[16] = "0123456789ABCDEF";

will trigger a warning like

  $ gcc -Wextra -c nonstring.c
  nonstring.c: In function ‘hexit’:
  nonstring.c:9:37: warning: initializer-string for array of ‘char’ truncates NUL terminator but destination lacks ‘nonstring’ attribute (17 chars into 16 available) [-Wunterminated-string-initialization]
      9 |         static const char hex[16] = "0123456789ABCDEF";
        |                                     ^~~~~~~~~~~~~~~~~~

By adding NXT_NONSTRING like

  static const char hex[16] NXT_NONSTRING = "0123456789ABCDEF";

we no longer get the warning.

Cc: Alejandro Colomar <alx@kernel.org>
Co-authored-by: Alejandro Colomar <alx@kernel.org>
Signed-off-by: Alejandro Colomar <alx@kernel.org>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/nxt_http_parse.c b/src/nxt_http_parse.c
index dd490e72..3ae4d41c 100644
--- a/src/nxt_http_parse.c
+++ b/src/nxt_http_parse.c
@@ -516,7 +516,7 @@ nxt_http_parse_field_name(nxt_http_request_parse_t *rp, u_char **pos,
     size_t    len;
     uint32_t  hash;
 
-    static const u_char  normal[256]  nxt_aligned(64) =
+    static const u_char  normal[256]  NXT_NONSTRING nxt_aligned(64) =
         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
     /*   \s ! " # $ % & ' ( ) * + ,        . /                 : ; < = > ?   */
         "\0\1\0\1\1\1\1\1\0\0\1\1\0" "-" "\1\0" "0123456789" "\0\0\0\0\0\0"