112 lines
3.5 KiB
C
112 lines
3.5 KiB
C
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#ifndef LIBNAGIOS_LNAG_UTILS_H_INCLUDED
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#define LIBNAGIOS_LNAG_UTILS_H_INCLUDED
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#include <unistd.h> /* for sysconf() */
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#include <stdlib.h> /* for rand() */
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/**
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* @file lnag-utils.h
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* @brief libnagios helper and compatibility macros that lack a "real" home.
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*
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* This is the home of random macros that must be present for compilation
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* to succeed but are missing on some platforms.
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*
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* @{
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*/
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#define NAGIOS_MKVERSION(a, b, c) \
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(((a) * 10000) + ((b) * 100) + (c))
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#ifdef __cplusplus
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/** C++ compatibility macro that avoids confusing indentation programs */
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# define NAGIOS_BEGIN_DECL extern "C" {
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/**
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* Use at end of header file declarations to obtain C++ compatibility
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* ... without confusing indentation programs
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*/
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# define NAGIOS_END_DECL }
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#else
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/** C++ compatibility macro that avoids confusing indentation programs */
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# define NAGIOS_BEGIN_DECL /* nothing */
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/** C++ compatibility macro that avoid confusing indentation programs */
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# define NAGIOS_END_DECL /* more of nothing */
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#endif
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#ifndef NODOXY /* doxy comments are useless here */
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# ifndef __GNUC__
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# define GCC_VERSION 0
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# define __attribute__(x) /* nothing */
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# else
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# ifdef __GNUC_PATCHLEVEL__
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# define GCC_VERSION NAGIOS_MKVERSION(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__)
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# else
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# define GCC_VERSION NAGIOS_MKVERSION(__GNUC__, __GNUC_MINOR__, 0)
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# endif /* __GNUC_PATCHLEVEL__ */
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# endif /* __GNUC__ */
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#endif /* NODOXY */
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#if GCC_VERSION >= NAGIOS_MKVERSION(4, 5, 0)
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# define NAGIOS_DEPRECATED(version, hint) \
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__attribute__((deprecated("This function will be removed in Nagios v" #version ". Please use " #hint " instead")))
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#else
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/** Macro for alerting module authors to function deprecation */
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# define NAGIOS_DEPRECATED(version, hint) \
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__attribute__((deprecated))
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#endif
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/*
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* These macros are widely used throughout Nagios
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*/
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#define OK 0 /**< Indicates successful function call in Nagios */
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#define ERROR -2 /**< Non-successful function call in Nagios */
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#ifdef FALSE
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#undef FALSE
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#endif
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#define FALSE 0 /**< Not true */
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#ifdef TRUE
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#undef TRUE
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#endif
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#define TRUE (!FALSE) /**< Not false */
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/** Useful macro to safely avoid double-free memory corruption */
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#define my_free(ptr) do { if(ptr) { free(ptr); ptr = NULL; } } while(0)
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#ifndef ARRAY_SIZE
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/** Useful for iterating over all elements in a static array */
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# define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
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#endif
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#ifndef veclen
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/** useful for iterating over all elements in a static array */
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# define veclen ARRAY_SIZE
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#endif
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#ifndef offsetof
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/** standard offsetof macro */
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# define offsetof(t, f) ((unsigned long)&((t *)0)->f)
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#endif
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/** character map initialization for .bss-allocated char maps */
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#define CHAR_MAP_INIT(k) { \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, k, \
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}
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/** @} */
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#endif
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