[PATCH 108/114] Add implementation of inet_net_ntop function for Phoenix.

[Jakub Sejdak]

From: Kuba Sejdak <jakub.sejdak@phoesys.com>

---
 newlib/libc/sys/phoenix/net/inet_net_ntop.c | 107 ++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 newlib/libc/sys/phoenix/net/inet_net_ntop.c

diff --git a/newlib/libc/sys/phoenix/net/inet_net_ntop.c b/newlib/libc/sys/phoenix/net/inet_net_ntop.c
new file mode 100644
index 0000000..7b25143
--- /dev/null
+++ b/newlib/libc/sys/phoenix/net/inet_net_ntop.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 1996 by Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
+ * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
+ * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ */
+
+/* Author: Paul Vixie (ISC), July 1996 */
+/* Copied from Linux, modified for Phoenix-RTOS. */
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <sys/types.h>
+
+#ifdef SPRINTF_CHAR
+# define SPRINTF(x) strlen(sprintf/**/x)
+#else
+# define SPRINTF(x) ((size_t)sprintf x)
+#endif
+
+static char *inet_net_ntop_ipv4(const u_char *src, int bits, char *dst, size_t size)
+{
+	char *odst = dst;
+	char *t;
+	u_int m;
+	int b;
+
+	if (bits < 0 || bits > 32) {
+		errno = EINVAL;
+		return (NULL);
+	}
+
+	if (bits == 0) {
+		if (size < sizeof "0")
+			goto emsgsize;
+
+		*dst++ = '0';
+		*dst = '\0';
+	}
+
+	/* Format whole octets. */
+	for (b = bits / 8; b > 0; b--) {
+		if (size < sizeof "255.")
+			goto emsgsize;
+
+		t = dst;
+		dst += SPRINTF((dst, "%u", *src++));
+
+		if (b > 1) {
+			*dst++ = '.';
+			*dst = '\0';
+		}
+
+		size -= (size_t)(dst - t);
+	}
+
+	/* Format partial octet. */
+	b = bits % 8;
+
+	if (b > 0) {
+		if (size < sizeof ".255")
+			goto emsgsize;
+
+		t = dst;
+
+		if (dst != odst)
+			*dst++ = '.';
+
+		m = ((1 << b) - 1) << (8 - b);
+		dst += SPRINTF((dst, "%u", *src & m));
+		size -= (size_t)(dst - t);
+	}
+
+	/* Format CIDR /width. */
+	if (size < sizeof "/32")
+		goto emsgsize;
+
+	dst += SPRINTF((dst, "/%u", bits));
+	return (odst);
+emsgsize:
+	errno = EMSGSIZE;
+	return (NULL);
+}
+
+char *inet_net_ntop(int af, const void *netp, int bits, char *pres, size_t psize)
+{
+	switch (af) {
+	case AF_INET:
+		return inet_net_ntop_ipv4(netp, bits, pres, psize);
+
+	default:
+		errno = EAFNOSUPPORT;
+		return NULL;
+	}
+}
-- 
2.5.0