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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_
/* stolen from FreeS/WAN */
#if linux
# if defined(i386) && !defined(__i386__)
# define __i386__ 1
# define MYHACKFORTHIS 1
# endif
# include <endian.h>
# ifdef MYHACKFORTHIS
# undef __i386__
# undef MYHACKFORTHIS
# endif
#elif !(defined(BIG_ENDIAN) && defined(LITTLE_ENDIAN) && defined(BYTE_ORDER))
/* we don't know how to do this, so we require the macros to be defined
* with compiler flags:
* -DBIG_ENDIAN=4321 -DLITTLE_ENDIAN=1234 -DBYTE_ORDER=BIG_ENDIAN
* or -DBIG_ENDIAN=4321 -DLITTLE_ENDIAN=1234 -DBYTE_ORDER=LITTLE_ENDIAN
* Thse match the GNU definitions
*/
# include <sys/endian.h>
#endif
#ifndef BIG_ENDIAN
#error "BIG_ENDIAN must be defined"
#endif
#ifndef LITTLE_ENDIAN
#error "LITTLE_ENDIAN must be defined"
#endif
#ifndef BYTE_ORDER
#error "BYTE_ORDER must be defined"
#endif
#define BITS_PER_BYTE 8
#define RSA_MIN_OCTETS (1024 / BITS_PER_BYTE)
#define RSA_MIN_OCTETS_UGH "RSA modulus too small for security: less than 1024 bits"
#define RSA_MAX_OCTETS (8192 / BITS_PER_BYTE)
#define RSA_MAX_OCTETS_UGH "RSA modulus too large: more than 8192 bits"
/**
* 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))
/**
* Debug macro to follow control flow
*/
#define POS printf("%s, line %d\n", __FILE__, __LINE__)
/**
* Macro to allocate a sized type.
*
* @param thing object on which a sizeof is performed
* @return poiner to allocated memory
*/
#define malloc_thing(thing) ((thing*)malloc(sizeof(thing)))
/**
* Mapping entry which defines the end of a mapping_t array.
*/
#define MAPPING_END (-1)
typedef struct mapping_t mapping_t;
/**
* @brief Mapping entry, where enum-to-string mappings are stored.
*/
struct mapping_t
{
/**
* Enumeration value.
*/
int value;
/**
* Mapped string.
*/
char *string;
};
/**
* @brief Find a mapping_string in the mapping[].
*
* @param mappings mappings array
* @param value enum-value to get the string from
*
*/
char *mapping_find(mapping_t *mappings, int value);
/**
* @brief Describes an enumeration
* enum_name() returns the name of an enum value, or NULL if invalid.
*/
typedef const struct enum_names enum_names;
struct enum_names {
unsigned long en_first; /* first value in range */
unsigned long en_last; /* last value in range (inclusive) */
const char *const *en_names;
enum_names *en_next_range; /* descriptor of next range */
};
/**
* @brief Returns the name of an enum value, or NULL if invalid
*/
const char *enum_name(enum_names *ed, unsigned long val);
#endif /*DEFINITIONS_H_*/
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