| /* |
| * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without modification, |
| * are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
| * OF SUCH DAMAGE. |
| * |
| * This file is part of the lwIP TCP/IP stack. |
| * |
| * Author: Adam Dunkels <adam@sics.se> |
| * |
| */ |
| #ifndef __LWIP_DEF_H__ |
| #define __LWIP_DEF_H__ |
| |
| /* arch.h might define NULL already */ |
| #include "lwip/arch.h" |
| #include "lwip/opt.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define LWIP_MAX(x , y) (((x) > (y)) ? (x) : (y)) |
| #define LWIP_MIN(x , y) (((x) < (y)) ? (x) : (y)) |
| |
| #ifndef NULL |
| #define NULL ((void *)0) |
| #endif |
| |
| /* Endianess-optimized shifting of two u8_t to create one u16_t */ |
| #if BYTE_ORDER == LITTLE_ENDIAN |
| #define LWIP_MAKE_U16(a, b) ((a << 8) | b) |
| #else |
| #define LWIP_MAKE_U16(a, b) ((b << 8) | a) |
| #endif |
| |
| #ifndef LWIP_PLATFORM_BYTESWAP |
| #define LWIP_PLATFORM_BYTESWAP 0 |
| #endif |
| |
| #ifndef LWIP_PREFIX_BYTEORDER_FUNCS |
| /* workaround for naming collisions on some platforms */ |
| |
| #ifdef htons |
| #undef htons |
| #endif /* htons */ |
| #ifdef htonl |
| #undef htonl |
| #endif /* htonl */ |
| #ifdef ntohs |
| #undef ntohs |
| #endif /* ntohs */ |
| #ifdef ntohl |
| #undef ntohl |
| #endif /* ntohl */ |
| |
| #define htons(x) lwip_htons(x) |
| #define ntohs(x) lwip_ntohs(x) |
| #define htonl(x) lwip_htonl(x) |
| #define ntohl(x) lwip_ntohl(x) |
| #endif /* LWIP_PREFIX_BYTEORDER_FUNCS */ |
| |
| #if BYTE_ORDER == BIG_ENDIAN |
| #define lwip_htons(x) (x) |
| #define lwip_ntohs(x) (x) |
| #define lwip_htonl(x) (x) |
| #define lwip_ntohl(x) (x) |
| #define PP_HTONS(x) (x) |
| #define PP_NTOHS(x) (x) |
| #define PP_HTONL(x) (x) |
| #define PP_NTOHL(x) (x) |
| #else /* BYTE_ORDER != BIG_ENDIAN */ |
| #if LWIP_PLATFORM_BYTESWAP |
| #define lwip_htons(x) LWIP_PLATFORM_HTONS(x) |
| #define lwip_ntohs(x) LWIP_PLATFORM_HTONS(x) |
| #define lwip_htonl(x) LWIP_PLATFORM_HTONL(x) |
| #define lwip_ntohl(x) LWIP_PLATFORM_HTONL(x) |
| #else /* LWIP_PLATFORM_BYTESWAP */ |
| u16_t lwip_htons(u16_t x); |
| u16_t lwip_ntohs(u16_t x); |
| u32_t lwip_htonl(u32_t x); |
| u32_t lwip_ntohl(u32_t x); |
| #endif /* LWIP_PLATFORM_BYTESWAP */ |
| |
| /* These macros should be calculated by the preprocessor and are used |
| with compile-time constants only (so that there is no little-endian |
| overhead at runtime). */ |
| #define PP_HTONS(x) ((((x) & 0xff) << 8) | (((x) & 0xff00) >> 8)) |
| #define PP_NTOHS(x) PP_HTONS(x) |
| #define PP_HTONL(x) ((((x) & 0xff) << 24) | \ |
| (((x) & 0xff00) << 8) | \ |
| (((x) & 0xff0000UL) >> 8) | \ |
| (((x) & 0xff000000UL) >> 24)) |
| #define PP_NTOHL(x) PP_HTONL(x) |
| |
| #endif /* BYTE_ORDER == BIG_ENDIAN */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* __LWIP_DEF_H__ */ |
| |