[glibc] inet: Implement inet_ntoa on top of inet_ntop

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=db94e6343ad03252a9e59df56614118fb7267ff8

commit db94e6343ad03252a9e59df56614118fb7267ff8
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Wed Jun 4 17:42:44 2025 -0300

    inet: Implement inet_ntoa on top of inet_ntop
    
    Checked on aarch64-linux-gnu and x86_64-linux-gnu.
    Reviewed-by: Collin Funk <collin.funk1@gmail.com>
    Reviewed-by: DJ Delorie <dj@redhat.com>

Diff:
---
 inet/inet_ntoa.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/inet/inet_ntoa.c b/inet/inet_ntoa.c
index a4543f630d..2efd24ef18 100644
--- a/inet/inet_ntoa.c
+++ b/inet/inet_ntoa.c
@@ -23,15 +23,12 @@
 /* The interface of this function is completely stupid, it requires a
    static buffer.  We relax this a bit in that we allow one buffer for
    each thread.  */
-static __thread char buffer[18];
+static __thread char buffer[INET_ADDRSTRLEN];
 
 
 char *
 inet_ntoa (struct in_addr in)
 {
-  unsigned char *bytes = (unsigned char *) ∈
-  __snprintf (buffer, sizeof (buffer), "%d.%d.%d.%d",
-	      bytes[0], bytes[1], bytes[2], bytes[3]);
-
+  __inet_ntop (AF_INET, &in, buffer, sizeof buffer);
   return buffer;
 }