| /** |
| * @file |
| * various utility macros |
| */ |
| |
| /* |
| * 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> |
| * |
| */ |
| |
| /** |
| * @defgroup perf Performance measurement |
| * @ingroup sys_layer |
| * All defines related to this section must not be placed in lwipopts.h, |
| * but in arch/perf.h! |
| * Measurement calls made throughout lwip, these can be defined to nothing. |
| * - PERF_START: start measuring something. |
| * - PERF_STOP(x): stop measuring something, and record the result. |
| */ |
| |
| #ifndef LWIP_HDR_DEF_H |
| #define LWIP_HDR_DEF_H |
| |
| /* arch.h might define NULL already */ |
| #include "lwip/arch.h" |
| #include "lwip/opt.h" |
| #if LWIP_PERF |
| #include "arch/perf.h" |
| #else /* LWIP_PERF */ |
| #define PERF_START /* null definition */ |
| #define PERF_STOP(x) /* null definition */ |
| #endif /* LWIP_PERF */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define LWIP_MAX(x , y) (((x) > (y)) ? (x) : (y)) |
| #define LWIP_MIN(x , y) (((x) < (y)) ? (x) : (y)) |
| |
| /* Get the number of entries in an array ('x' must NOT be a pointer!) */ |
| #define LWIP_ARRAYSIZE(x) (sizeof(x)/sizeof((x)[0])) |
| |
| /** Create u32_t value from bytes */ |
| #define LWIP_MAKEU32(a,b,c,d) (((u32_t)((a) & 0xff) << 24) | \ |
| ((u32_t)((b) & 0xff) << 16) | \ |
| ((u32_t)((c) & 0xff) << 8) | \ |
| (u32_t)((d) & 0xff)) |
| |
| #ifndef NULL |
| #ifdef __cplusplus |
| #define NULL 0 |
| #else |
| #define NULL ((void *)0) |
| #endif |
| #endif |
| |
| #if BYTE_ORDER == BIG_ENDIAN |
| #define lwip_htons(x) ((u16_t)(x)) |
| #define lwip_ntohs(x) ((u16_t)(x)) |
| #define lwip_htonl(x) ((u32_t)(x)) |
| #define lwip_ntohl(x) ((u32_t)(x)) |
| #define PP_HTONS(x) ((u16_t)(x)) |
| #define PP_NTOHS(x) ((u16_t)(x)) |
| #define PP_HTONL(x) ((u32_t)(x)) |
| #define PP_NTOHL(x) ((u32_t)(x)) |
| #else /* BYTE_ORDER != BIG_ENDIAN */ |
| #ifndef lwip_htons |
| u16_t lwip_htons(u16_t x); |
| #endif |
| #define lwip_ntohs(x) lwip_htons(x) |
| |
| #ifndef lwip_htonl |
| u32_t lwip_htonl(u32_t x); |
| #endif |
| #define lwip_ntohl(x) lwip_htonl(x) |
| |
| /* 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) ((u16_t)((((x) & (u16_t)0x00ffU) << 8) | (((x) & (u16_t)0xff00U) >> 8))) |
| #define PP_NTOHS(x) PP_HTONS(x) |
| #define PP_HTONL(x) ((((x) & (u32_t)0x000000ffUL) << 24) | \ |
| (((x) & (u32_t)0x0000ff00UL) << 8) | \ |
| (((x) & (u32_t)0x00ff0000UL) >> 8) | \ |
| (((x) & (u32_t)0xff000000UL) >> 24)) |
| #define PP_NTOHL(x) PP_HTONL(x) |
| #endif /* BYTE_ORDER == BIG_ENDIAN */ |
| |
| /* Provide usual function names as macros for users, but this can be turned off */ |
| #ifndef LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS |
| #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 |
| |
| /* Functions that are not available as standard implementations. |
| * In cc.h, you can #define these to implementations available on |
| * your platform to save some code bytes if you use these functions |
| * in your application, too. |
| */ |
| |
| #ifndef lwip_itoa |
| /* This can be #defined to itoa() or snprintf(result, bufsize, "%d", number) depending on your platform */ |
| void lwip_itoa(char* result, size_t bufsize, int number); |
| #endif |
| #ifndef lwip_strnicmp |
| /* This can be #defined to strnicmp() or strncasecmp() depending on your platform */ |
| int lwip_strnicmp(const char* str1, const char* str2, size_t len); |
| #endif |
| #ifndef lwip_stricmp |
| /* This can be #defined to stricmp() or strcasecmp() depending on your platform */ |
| int lwip_stricmp(const char* str1, const char* str2); |
| #endif |
| #ifndef lwip_strnstr |
| /* This can be #defined to strnstr() depending on your platform */ |
| char* lwip_strnstr(const char* buffer, const char* token, size_t n); |
| #endif |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* LWIP_HDR_DEF_H */ |