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/**
* slibc — Yet another C library
* Copyright © 2015, 2016 Mattias Andrée (maandree@member.fsf.org)
*
* This program 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.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _ARAP_INET_H
#define _ARAP_INET_H
#include <slibc/version.h>
#include <slibc/features.h>
#define __NEED_uint16_t
#define __NEED_uint32_t
#if defined(__SLIBC_SOURCE)
# define __NEED_uint64_t
#endif
#include <bits/types.h>
/* On some implementations, these functions are defined as macros. */
/**
* Convert a 16-bit quantity from network byte order
* little endian) to host byte order.
*
* @etymology (N)etwork byte order (to) (h)ost byte order, (s)hort.
*
* @param value A 16-bit quantity to convert.
* @return The value in host byte order.
*
* @since Always.
*/
uint16_t _ntohs(uint16_t)
__GCC_ONLY(__attribute__((__const__, __warn_unused_result__)));
#if !defined(__PORTABLE)
# define ntohs _ntohs
#else
# define ntohs(value) (_ntohs(value))
#endif
/**
* Convert a 32-bit quantity from network byte order
* (little endian) to host byte order.
*
* @etymology (N)etwork byte order (to) (h)ost byte order, (l)ong.
*
* @param value A 32-bit quantity to convert.
* @return The value in host byte order.
*
* @since Always.
*/
uint32_t _ntohl(uint32_t)
__GCC_ONLY(__attribute__((__const__, __warn_unused_result__)));
#if !defined(__PORTABLE)
# define ntohl _ntohl
#else
# define ntohl(value) (_ntohl(value))
#endif
#if defined(__SLIBC_SOURCE)
/**
* Convert a 64-bit quantity from network byte order
* (little endian) to host byte order.
*
* This is a slibc extension.
*
* @etymology (N)etwork byte order (to) (h)ost byte order, (l)ong (l)ong.
*
* @param value A 64-bit quantity to convert.
* @return The value in host byte order.
*
* @since Always.
*/
uint64_t _ntohll(uint64_t)
__GCC_ONLY(__attribute__((__const__, __warn_unused_result__)));
# if !defined(__PORTABLE)
# define ntohll _ntohll
# else
# define ntohll(value) (_ntohll(value))
# endif
#endif
/**
* Convert a 16-bit quantity from host byte order
* little endian) to network byte order.
*
* @etymology (H)ost byte order (to) (n)etwork byte order, (s)hort.
*
* @param value A 16-bit quantity to convert.
* @return The value in network byte order.
*
* @since Always.
*/
uint16_t _htons(uint16_t)
__GCC_ONLY(__attribute__((__const__, __warn_unused_result__)));
#if !defined(__PORTABLE)
# define htons _htons
#else
# define htons(value) (_htons(value))
#endif
/**
* Convert a 32-bit quantity from host byte order
* (little endian) to network byte order.
*
* @etymology (H)ost byte order (to) (n)etwork byte order, (l)ong.
*
* @param value A 32-bit quantity to convert.
* @return The value in network byte order.
*
* @since Always.
*/
uint32_t _htonl(uint32_t)
__GCC_ONLY(__attribute__((__const__, __warn_unused_result__)));
#if !defined(__PORTABLE)
# define htonl _htonl
#else
# define htonl(value) (_htonl(value))
#endif
#if defined(__SLIBC_SOURCE)
/**
* Convert a 64-bit quantity from host byte order
* (little endian) to network byte order.
*
* This is a slibc extension.
*
* @etymology (H)ost byte order (to) (n)etwork byte order, (l)ong (l)ong.
*
* @param value A 64-bit quantity to convert.
* @return The value in network byte order.
*
* @since Always.
*/
uint64_t _htonll(uint64_t)
__GCC_ONLY(__attribute__((__const__, __warn_unused_result__)));
# if !defined(__PORTABLE)
# define htonll _htonll
# else
# define htonll(value) (_htonll(value))
# endif
#endif
/* TODO We "need" conversion to and from two's complement.
* It is important to remember than intN_t cannot be
* used for this functions because they require two's
* complement.
*
* unsigned to_twos_complement(signed v) {
* unsigned r;
* if (v >= -0)
* return (unsigned)v;
* r = (unsigned)-v;
* r = ~(r - 1);
* return r;
* }
*
* signed from_twos_complement(unsigned v) {
* signed r;
* if ((v >> (X_BIT - 1)) == 0)
* return (signed)v;
* r = ~r;
* if (r == X_MAX)
* return errno = ERANGE, 0;
* return errno = 0, r + 1;
* }
*/
#endif
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