Add function versions of ntohl and friends

1 files changed, 67 insertions, 0 deletions

diff --git a/libc/inet/ntohl.c b/libc/inet/ntohl.c
new file mode 100644
index 000000000..4fbdf7096
--- /dev/null
+++ b/libc/inet/ntohl.c
@@ -0,0 +1,67 @@
+/* vi: set sw=4 ts=4:
+ * Functions to convert between host and network byte order.
+ *
+ * Copyright (C) 2003 by Erik Andersen <andersen@uclibc.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Library General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdint.h>
+#include <endian.h>
+#include <byteswap.h>
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+extern uint32_t ntohl (uint32_t x)
+{
+	return x;
+}
+
+extern uint16_t ntohs (uint16_t x)
+{
+	return x;
+}
+
+extern uint32_t htonl (uint32_t x)
+{
+	return x;
+}
+
+extern uint16_t htons (uint16_t x)
+{
+	return x;
+}
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
+extern uint32_t ntohl (uint32_t x)
+{
+	return __bswap_32(x);
+}
+
+extern uint16_t ntohs (uint16_t x)
+{
+	return __bswap_16(x);
+}
+
+extern uint32_t htonl (uint32_t x)
+{
+	return __bswap_32(x);
+}
+
+extern uint16_t htons (uint16_t x)
+{
+	return __bswap_16(x);
+}
+#else
+#error "You seem to have an unsupported byteorder"
+#endif