100 lines
2.7 KiB
C
Executable File
100 lines
2.7 KiB
C
Executable File
/*
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* Copyright (C) 2010-2011 Mamadou Diop.
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*
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* Contact: Mamadou Diop <diopmamadou(at)doubango[dot]org>
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*
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* This file is part of Open Source Doubango Framework.
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*
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* DOUBANGO is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* DOUBANGO is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with DOUBANGO.
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*
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*/
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/**@file tnet_endianness.c
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* @brief Byte Ordering.
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*
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* @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
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*
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*/
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#include "tnet_endianness.h"
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#include "tnet.h"
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extern tsk_bool_t tnet_isBigEndian;
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/** Converts a 16-bit value from host to TCP/IP network byte order (big-endian).
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* @param x The 16-bit (in host byte order) value to convert.
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* @retval @a x in TCP/IP network byte order.
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*/
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unsigned short tnet_htons(unsigned short x)
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{
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if(tnet_is_BE()) {
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return x;
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}
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else {
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return ((((uint16_t)(x) & 0xff00) >> 8) |
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(((uint16_t)(x) & 0x00ff) << 8));
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}
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}
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/* Memory alignment hack */
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unsigned short tnet_htons_2(const void* px)
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{
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unsigned short y = TSK_TO_UINT16((const uint8_t*)px);
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return tnet_htons(y);
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}
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/** Converts a 32-bit value from host to TCP/IP network byte order (big-endian).
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* @param x The 32-bit (in host byte order) value to convert.
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* @retval @a x in TCP/IP network byte order.
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*/
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unsigned long tnet_htonl(unsigned long x)
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{
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if(tnet_is_BE()) {
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return x;
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}
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else {
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return ((((uint32_t)(x) & 0xff000000) >> 24) | \
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(((uint32_t)(x) & 0x00ff0000) >> 8) | \
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(((uint32_t)(x) & 0x0000ff00) << 8) | \
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(((uint32_t)(x) & 0x000000ff) << 24));
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}
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}
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/* Memory alignment hack */
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unsigned long tnet_htonl_2(const void* px)
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{
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unsigned long y = TSK_TO_UINT32((const uint8_t*)px);
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return tnet_htonl(y);
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}
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/** Indicates whether we are on a Big Endian host or not.<br>
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* <b>IMPORTANT</b>: Before calling this function, you should initialize the network stack by using
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* @ref tnet_startup().
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* @retval @a tsk_true if the program is runnin on a Big Endian host and @a tsk_false otherwise.
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*/
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tsk_bool_t tnet_is_BE()
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{
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/* If LITTLE_ENDIAN or BIG_ENDIAN macros have been defined in config.h ==> use them
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* otherwise ==> dyn retrieve the endianness
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*/
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#if LITTLE_ENDIAN
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return tsk_false;
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#elif BIG_ENDIAN
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return tsk_true;
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#else
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return tnet_isBigEndian;
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#endif
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}
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