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/**
* @file definitions.h
*
* @brief General purpose definitions and macros.
*
*/
/*
* Copyright (C) 2005-2006 Martin Willi
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
* Copyright (C) 1998, 1999 D. Hugh Redelmeier. (Endian stuff)
*
* 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 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
#ifndef DEFINITIONS_H_
#define DEFINITIONS_H_
#include <stddef.h>
#define BITS_PER_BYTE 8
/**
* Default length for various auxiliary text buffers
*/
#define BUF_LEN 512
/**
* Macro compares two strings for equality
*/
#define streq(x,y) (strcmp(x, y) == 0)
/**
* Macro compares two binary blobs for equality
*/
#define memeq(x,y,len) (memcmp(x, y, len) == 0)
/**
* Macro gives back larger of two values.
*/
#define max(x,y) ((x) > (y) ? (x):(y))
/**
* Macro gives back smaller of two values.
*/
#define min(x,y) ((x) < (y) ? (x):(y))
/**
* Call destructor of a object if object != NULL
*/
#define DESTROY_IF(obj) if (obj) obj->destroy(obj)
/**
* Debug macro to follow control flow
*/
#define POS printf("%s, line %d\n", __FILE__, __LINE__)
/**
* Macro to allocate a sized type.
*/
#define malloc_thing(thing) ((thing*)malloc(sizeof(thing)))
/**
* Assign a function as a class method
*/
#define ASSIGN(method, function) (method = (typeof(method))function)
/**
* printf() specifier to resolf enum names, see enum_names
*/
#define ENUM_PRINTF_SPEC 'N'
typedef struct enum_name_t enum_name_t;
/**
* Struct to store names for enums. Use the convenience macros
* to define these.
* For a single range, use:
* ENUM(name, first, last, string1, string2, ...)
*
* For multiple ranges, use:
* ENUM_BEGIN(name, first, last, string1, string2, ...)
* ENUM_NEXT(name, first, last, last_from_previous, string3, ...)
* ENUM_NEXT(name, first, last, last_from_previous, string4, ...)
* ENUM_END(name, last_from_previous)
*/
struct enum_name_t {
long first;
long last;
enum_name_t *next;
char *names[];
};
#define ENUM_BEGIN(name, first, last, ...) static enum_name_t name##last = {first, last, NULL, { __VA_ARGS__ }}
#define ENUM_NEXT(name, first, last, prev, ...) static enum_name_t name##last = {first, last, &name##prev, { __VA_ARGS__ }}
#define ENUM_END(name, prev) enum_name_t *name = &name##prev;
#define ENUM(name, first, last, ...) ENUM_BEGIN(name, first, last, __VA_ARGS__); ENUM_END(name, last)
#endif /*DEFINITIONS_H_*/
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