Subject: [PATCH] maint: add attributes to two functions without side effects

From: Samuel Tardieu <[email-masked]>
Date: Fri, 5 Jan 2024 17:44:06 +0100

* src/date.c (res_width): This function computes its result solely
from the value of its parameter and qualifies for the const attribute.
* src/tee.c (get_next_out): This function has no side effect and
qualifies for the pure attribute.

Those two functions were flagged by GCC 12.3.0.
---
Resent here, I sent it to the coreutils@ mailing-list while the hacking
doc says to send it here.

 src/date.c | 1 +
 src/tee.c  | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/date.c b/src/date.c
index 39fc0715d..03bf012e2 100644
--- a/src/date.c
+++ b/src/date.c
@@ -294,6 +294,7 @@ Show the local time for 9AM next Friday on the west coast of the US\n\
 /* Yield the number of decimal digits needed to output a time with the
    nanosecond resolution RES, without losing information.  */
 
+ATTRIBUTE_CONST
 static int
 res_width (long int res)
 {
diff --git a/src/tee.c b/src/tee.c
index 07d525c95..eb074427c 100644
--- a/src/tee.c
+++ b/src/tee.c
@@ -185,6 +185,7 @@ main (int argc, char **argv)
 /* Return the index of the first non-null descriptor after idx,
    or -1 if all are null.  */
 
+ATTRIBUTE_PURE
 static int
 get_next_out (FILE **descriptors, int nfiles, int idx)
 {
-- 
2.42.0