inet_net_pton.c: use pg_ascii_tolower() rather than tolower().

Avoid dependence on setlocale(). No behavior change.

Discussion: https://postgr.es/m/9875f7f9-50f1-4b5d-86fc-ee8b03e8c162@eisentraut.org
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>

diff --git a/src/backend/utils/adt/inet_net_pton.c b/src/backend/utils/adt/inet_net_pton.c
index ef2236d9f0430eae68594809f5a6d2e708402991..3b0db2a379937b667d67e43f47905a47281352b1 100644 (file)
--- a/src/backend/utils/adt/inet_net_pton.c
+++ b/src/backend/utils/adt/inet_net_pton.c
@@ -115,8 +115,7 @@ inet_cidr_pton_ipv4(const char *src, u_char *dst, size_t size)
        src++;                  /* skip x or X. */
        while ((ch = *src++) != '\0' && isxdigit((unsigned char) ch))
        {
-           if (isupper((unsigned char) ch))
-               ch = tolower((unsigned char) ch);
+           ch = pg_ascii_tolower((unsigned char) ch);
            n = strchr(xdigits, ch) - xdigits;
            assert(n >= 0 && n <= 15);
            if (dirty == 0)