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Diffstat (limited to 'lwip/src/include/lwip/def.h')
| -rw-r--r-- | lwip/src/include/lwip/def.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/lwip/src/include/lwip/def.h b/lwip/src/include/lwip/def.h new file mode 100644 index 0000000..dfb266d --- /dev/null +++ b/lwip/src/include/lwip/def.h @@ -0,0 +1,152 @@ +/** + * @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 */ |