doubango/tinyNET/src/tnet_endianness.c
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 #if HAVE_CRT
 #define _CRTDBG_MAP_ALLOC 
 #include <stdlib.h> 
 #include <crtdbg.h>
 #endif //HAVE_CRT
 /*
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 * Copyright (C) 2020, University of the Basque Country (UPV/EHU)
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 * Contact for licensing options: <licensing-mcpttclient(at)mcopenplatform(dot)com>
 *
 * The original file was part of Open Source Doubango Framework
 * Copyright (C) 2010-2011 Mamadou Diop.
 * Copyright (C) 2012 Doubango Telecom <http://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[dot]org>
  *
 
  */
 #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
 }