1 files changed, 98 insertions, 0 deletions
diff --git a/tinyNET/src/tnet_endianness.c b/tinyNET/src/tnet_endianness.c
new file mode 100644
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+++ b/tinyNET/src/tnet_endianness.c
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+/*
+* Copyright (C) 2009-2010 Mamadou Diop.
+*
+* Contact: Mamadou Diop <diopmamadou(at)doubango.org>
+*	
+* This file is part of Open Source Doubango Framework.
+*
+* DOUBANGO is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*	
+* DOUBANGO 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 General Public License for more details.
+*	
+* You should have received a copy of the GNU General Public License
+* along with DOUBANGO.
+*
+*/
+
+/**@file tnet_endianness.c
+ * @brief Byte Ordering.
+ *
+ * @author Mamadou Diop <diopmamadou(at)doubango.org>
+ *
+ * @date Created: Sat Nov 8 16:54:58 2009 mdiop
+ */
+#include "tnet_endianness.h"
+
+#include "tnet.h"
+
+extern tsk_bool_t tnet_isBigEndian;
+
+/** Converts a 16-bit value from host to TCP/IP network byte order (big-endian).
+* @param x The 16-bit (in host byte order) value to convert.
+* @retval @a x in TCP/IP network byte order.
+*/
+unsigned short tnet_htons(unsigned short x)
+{
+	if(tnet_is_BE()){
+		return x;
+	}
+	else{
+		return ((((uint16_t)(x) & 0xff00) >> 8)		|
+						(((uint16_t)(x) & 0x00ff) << 8));
+	}
+}
+
+/* Memory alignment hack */
+unsigned short tnet_htons_2(const void* px)
+{
+	unsigned short y = TSK_TO_UINT16((const uint8_t*)px);
+	return tnet_htons(y);
+}
+
+/** Converts a 32-bit value from host to TCP/IP network byte order (big-endian).
+* @param x The 32-bit (in host byte order) value to convert.
+* @retval @a x in TCP/IP network byte order.
+*/
+unsigned long tnet_htonl(unsigned long x)
+{
+	if(tnet_is_BE()){
+		return x;
+	}
+	else{
+		return ((((uint32_t)(x) & 0xff000000) >> 24)	| \
+						(((uint32_t)(x) & 0x00ff0000) >> 8)		| \
+						(((uint32_t)(x) & 0x0000ff00) << 8)		| \
+						(((uint32_t)(x) & 0x000000ff) << 24));
+	}
+}
+
+/* Memory alignment hack */
+unsigned long tnet_htonl_2(const void* px)
+{
+	unsigned long y = TSK_TO_UINT32((const uint8_t*)px);
+	return tnet_htonl(y);
+}
+
+/** Indicates whether we are on a Big Endian host or not.<br>
+* <b>IMPORTANT</b>: Before calling this function, you should initialize the network stack by using
+* @ref tnet_startup().
+* @retval @a tsk_true if the program is runnin on a Big Endian host and @a tsk_false otherwise.
+*/
+tsk_bool_t tnet_is_BE(){
+	/* If LITTLE_ENDIAN or BIG_ENDIAN macros have been defined in config.h ==> use them
+	* otherwise ==> dyn retrieve the endianness
+	*/
+#if LITTLE_ENDIAN
+	return tsk_false;
+#elif BIG_ENDIAN
+	return tsk_true;
+#else
+	return tnet_isBigEndian;
+#endif
+}