lib/vsprintf.c: Add IPV4 options %pI4[hnbl] for host, network, big and little endian
This should allow the removal of the #defines and uses
of NIPQUAD and NIPQUAD_FMT
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index e83e3e7..add0446 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -699,13 +699,37 @@
return string(buf, end, mac_addr, spec);
}
-static char *ip4_string(char *p, const u8 *addr, bool leading_zeros)
+static char *ip4_string(char *p, const u8 *addr, const char *fmt)
{
int i;
+ bool leading_zeros = (fmt[0] == 'i');
+ int index;
+ int step;
+ switch (fmt[2]) {
+ case 'h':
+#ifdef __BIG_ENDIAN
+ index = 0;
+ step = 1;
+#else
+ index = 3;
+ step = -1;
+#endif
+ break;
+ case 'l':
+ index = 3;
+ step = -1;
+ break;
+ case 'n':
+ case 'b':
+ default:
+ index = 0;
+ step = 1;
+ break;
+ }
for (i = 0; i < 4; i++) {
char temp[3]; /* hold each IP quad in reverse order */
- int digits = put_dec_trunc(temp, addr[i]) - temp;
+ int digits = put_dec_trunc(temp, addr[index]) - temp;
if (leading_zeros) {
if (digits < 3)
*p++ = '0';
@@ -717,6 +741,7 @@
*p++ = temp[digits];
if (i < 3)
*p++ = '.';
+ index += step;
}
*p = '\0';
@@ -796,7 +821,7 @@
if (useIPv4) {
if (needcolon)
*p++ = ':';
- p = ip4_string(p, &in6.s6_addr[12], false);
+ p = ip4_string(p, &in6.s6_addr[12], "I4");
}
*p = '\0';
@@ -836,7 +861,7 @@
{
char ip4_addr[sizeof("255.255.255.255")];
- ip4_string(ip4_addr, addr, fmt[0] == 'i');
+ ip4_string(ip4_addr, addr, fmt);
return string(buf, end, ip4_addr, spec);
}
@@ -911,6 +936,7 @@
* - 'i' [46] for 'raw' IPv4/IPv6 addresses
* IPv6 omits the colons (01020304...0f)
* IPv4 uses dot-separated decimal with leading 0's (010.123.045.006)
+ * - '[Ii]4[hnbl]' IPv4 addresses in host, network, big or little endian order
* - 'I6c' for IPv6 addresses printed as specified by
* http://www.ietf.org/id/draft-kawamura-ipv6-text-representation-03.txt
* - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form