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C166 User's Guide

C166 Introduction Compiling Programs Language Extensions Preprocessor Advanced Programming Error Messages Library Reference Library Files Source Code Standard Types jmp_buf ptrdiff_t size_t va_list wchar_t Macros HARRAY HVAR MARRAY MVAR XARRAY XVAR Routines By Category Buffer Manipulation Routines Character Routines Data Conversion Routines Intrinsic Routines Math Routines Memory Allocation Routines Stream I/O Routines String Routines Variable Length Argument Routines Miscellaneous Routines Include Files SFR Definitions absacc.h assert.h ctype.h float.h intrins.h limits.h math.h membox.h setjmp.h stdarg.h stddef.h stdio.h stdlib.h string.h Reference _alloc_boxf _alloc_boxh _alloc_boxn _atomic_ _bfld_ _calloc_boxf _calloc_boxh _calloc_boxn _chkdouble_ _chkfloat_ _crol_ _cror_ _diswdt_ _einit_ _endatomic_ _free_boxf _free_boxh _free_boxn _getkey _idle_ _init_boxf _init_boxh _init_boxn _irol_ _iror_ _lrol_ _lror_ _nop_ _pop_ _prior_ _priord_ _push_ _pwrdn_ _sof_ _srvwdt_ _testclear_ _testset_ _tolower _toupper _trap_ abs acos asin assert atan atan2 atof atoi atol calloc calloc_b ceil cos cosh exp fabs floor fmemccpy fmemchr fmemcmp fmemcpy fmemmove fmemset fmod free free_b fstrcat fstrchr fstrcmp fstrcpy fstrcspn fstrlen fstrncat fstrncmp fstrncpy fstrpbrk fstrpos fstrrchr fstrrpbrk fstrrpos fstrspn getchar gets hmemcmp hmemcpy hstrcmp hstrcpy init_mempool init_mempool_b isalnum isalpha iscntrl isdigit isgraph islower isprint ispunct isspace isupper isxdigit labs log log10 longjmp malloc malloc_b memccpy memchr memcmp memcpy memmove memset modf offsetof pow printf putchar puts rand realloc realloc_b scanf setjmp sin sinh sprintf sqrt srand sscanf strcat strchr strcmp strcpy strcspn strlen strncat strncmp strncpy strpbrk strpos strrchr strrpbrk strrpos strspn strstr strtod strtol strtoul tan tanh toascii toint tolower toupper ungetchar va_arg va_end va_start vprintf vsprintf xcalloc xfree xinit_mempool xmalloc xmemccpy xmemchr xmemcmp xmemcpy xmemmove xmemset xrealloc xstrcmp xstrcpy xstrlen xstrncpy Appendix

float.h

The float.h include file defines manifest constants that represent implementation-defined properties of floating-point numbers.

Defined Constant Description
DBL_DIG The precision in decimal digits for type double.
DBL_EPSILON The smallest n of type double such that 1.0 + n != 1.0.
DBL_MANT_DIG The number of mantissa digits, base DBL_RADIX, for type double.
DBL_MAX The largest finite representable value of type double.
DBL_MAX_10_EXP The maximum integer n, such that 10n is a finite representable value of type double.
DBL_MAX_EXP The maximum integer n, such that DBL_RADIXn-1 is a finite representable value of type double.
DBL_MIN The smallest normalized, finite representable value of type double.
DBL_MIN_10_EXP The minimum integer n such that 10n is a normalized, finite representable value of type double.
DBL_MIN_EXP The minimum integer n such that DBL_RADIXn-1 is a normalized, finite representable value of type double.
DBL_RADIX The radix of all double types.
DBL_ROUNDS A value that describes the current rounding mode for double operations.
  • -1 if the mode is indeterminate,
  • 0 if rounding is toward zero,
  • 1 if rounding is to nearest representable value (this is the default for the C166 Compiler),
  • 2 if rounding is toward +infinity,
  • 3 if rounding is toward -infinity.
FLT_DIG The precision in decimal digits for type float.
FLT_EPSILON The smallest n of type float such that 1.0 + n != 1.0.
FLT_MANT_DIG The number of mantissa digits, base FLT_RADIX, for type float.
FLT_MAX The largest finite representable value of type float.
FLT_MAX_10_EXP The maximum integer n, such that 10n is a finite representable value of type float.
FLT_MAX_EXP The maximum integer n, such that FLT_RADIXn-1 is a finite representable value of type float.
FLT_MIN The smallest normalized, finite representable value of type float.
FLT_MIN_10_EXP The minimum integer n, such that 10n is a normalized, finite representable value of type float.
FLT_MIN_EXP The minimum integer n, such that FLT_RADIXn-1 is a normalized, finite representable value of type float.
FLT_RADIX The radix of all float types.
FLT_ROUNDS A value that describes the current rounding mode for float operations.
  • -1 if the mode is indeterminate,
  • 0 if rounding is toward zero,
  • 1 if rounding is to nearest representable value (this is the default for the C166 Compiler),
  • 2 if rounding is toward +infinity,
  • 3 if rounding is toward -infinity.
LDBL_DIG The precision in decimal digits for type long double.
LDBL_EPSILON The smallest n of type long double such that 1.0 + n != 1.0.
LDBL_MANT_DIG The number of mantissa digits, base LDBL_RADIX, for type long double.
LDBL_MAX The largest finite representable value of type long double.
LDBL_MAX_10_EXP The maximum integer n, such that 10n is a finite representable value of type long double.
LDBL_MAX_EXP The maximum integer n, such that LDBL_RADIXn-1 is a finite representable value of type long double.
LDBL_MIN The smallest normalized, finite representable value of type long double.
LDBL_MIN_10_EXP The minimum integer n, such that 10n is a normalized, finite representable value of type long double.
LDBL_MIN_EXP The minimum integer n, such that LDBL_RADIXn-1 is a normalized, finite representable value of type long double.
LDBL_RADIX The radix of all long double types.
LDBL_ROUNDS A value that describes the current rounding mode for long double operations.
  • -1 if the mode is indeterminate,
  • 0 if rounding is toward zero,
  • 1 if rounding is to nearest representable value (this is the default for the C166 Compiler),
  • 2 if rounding is toward +infinity,
  • 3 if rounding is toward -infinity.

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