#ifndef _CONFIG_AUX_H
#define _CONFIG_AUX_H
      
#if STDC_HEADERS
# include <string.h>
#else
# ifndef HAVE_STRCHR
#  define strchr index
#  define strrchr rindex
# endif
char *strchr (), *strrchr ();
# ifndef HAVE_MEMMOVE
#  define memcpy(d, s, n) bcopy ((s), (d), (n))
#  define memmove(d, s, n) bcopy ((s), (d), (n))
# endif
#endif


#if NO_NULL_REALLOC
# define rrd_realloc(a,b) ( (a) == NULL ? malloc( (b) ) : realloc( (a) , (b) ))
#else
# define rrd_realloc(a,b) realloc((a), (b))
#endif      

#if HAVE_MATH_H
#  include <math.h>
#endif

#if HAVE_FLOAT_H
#  include <float.h>
#endif

#if HAVE_IEEEFP_H
#  include <ieeefp.h>
#endif

#if HAVE_FP_CLASS_H
#  include <fp_class.h>
#endif

/* for Solaris */
#if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASS))
#  define HAVE_ISINF 1
#  define isinf(a) (fpclass(a) == FP_NINF || fpclass(a) == FP_PINF)
#endif

/* for OSF1 Digital Unix */
#if (! defined(HAVE_ISINF) && defined(HAVE_FP_CLASS) && defined(HAVE_FP_CLASS_H))
#  define HAVE_ISINF 1
#  define isinf(a) (fp_class(a) == FP_NEG_INF || fp_class(a) == FP_POS_INF)
#endif

#if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASSIFY) && defined(FP_PLUS_INF) && defined(FP_MINUS_INF))
#  define HAVE_ISINF 1
#  define isinf(a) (fpclassify(a) == FP_MINUS_INF || fpclassify(a) == FP_PLUS_INF)
#endif

#if (! defined(HAVE_ISINF) && defined(HAVE_FPCLASSIFY) && defined(FP_INFINITE))
#  define HAVE_ISINF 1
#  define isinf(a) (fpclassify(a) == FP_INFINITE)
#endif

/* for AIX */
#if (! defined(HAVE_ISINF) && defined(HAVE_CLASS))
#  define HAVE_ISINF 1
#  define isinf(a) (class(a) == FP_MINUS_INF || class(a) == FP_PLUS_INF)
#endif

#if (! defined (HAVE_FINITE) && defined (HAVE_ISFINITE))
#  define HAVE_FINITE 1
#  define finite(a) isfinite(a)
#endif

#if (! defined(HAVE_FINITE) && defined(HAVE_ISNAN) && defined(HAVE_ISINF))
#  define HAVE_FINITE 1
#  define finite(a) (! isnan(a) && ! isinf(a))
#endif

#ifndef HAVE_FINITE
#error "Can't compile without finite function"
#endif

#ifndef HAVE_ISINF
#error "Can't compile without isinf function"
#endif

#endif /* CONFIG_AUX_H */