Difference between revisions of "cpp/types/climits"
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{{dsc macro const | FLT_RADIX | the radix (integer base) used by the representation of all three floating-point types | nolink=true }} | {{dsc macro const | FLT_RADIX | the radix (integer base) used by the representation of all three floating-point types | nolink=true }} | ||
{{dsc macro const | DECIMAL_DIG | conversion from {{c|long double}} to decimal with at least {{tt|DECIMAL_DIG}} digits and back to {{c|long double}} is the identity conversion. : this is the decimal precision required to serialize/deserialize a {{c|long double}} (see also {{lc|std::numeric_limits::max_digits10}}) | nolink=true | notes={{mark c++11}}}} | {{dsc macro const | DECIMAL_DIG | conversion from {{c|long double}} to decimal with at least {{tt|DECIMAL_DIG}} digits and back to {{c|long double}} is the identity conversion. : this is the decimal precision required to serialize/deserialize a {{c|long double}} (see also {{lc|std::numeric_limits::max_digits10}}) | nolink=true | notes={{mark c++11}}}} | ||
| − | {{dsc macro const | FLT_DECIMAL_DIG<br>DBL_DECIMAL_DIG<br>LDBL_DECIMAL_DIG | conversion from {{c|float}}/{{c|double}}/{{c|long double}} to decimal with at least {{tt|FLT_DECIMAL_DIG}}/{{tt|DBL_DECIMAL_DIG}}/{{tt|LDBL_DECIMAL_DIG}} digits and back is the identity conversion. : this is the decimal precision required to serialize/deserialize a floating-point value (see also {{lc|std::numeric_limits::max_digits10}}). Defined to at least 6, 10, and 10 respectively, or 9 | + | {{dsc macro const | FLT_DECIMAL_DIG<br>DBL_DECIMAL_DIG<br>LDBL_DECIMAL_DIG | conversion from {{c|float}}/{{c|double}}/{{c|long double}} to decimal with at least {{tt|FLT_DECIMAL_DIG}}/{{tt|DBL_DECIMAL_DIG}}/{{tt|LDBL_DECIMAL_DIG}} digits and back is the identity conversion. : this is the decimal precision required to serialize/deserialize a floating-point value (see also {{lc|std::numeric_limits::max_digits10}}). Defined to at least 6, 10, and 10 respectively, or 9 for IEEE float and 17 for IEEE double. | nolink=true | notes={{mark c++17}}}} |
{{dsc macro const | FLT_MIN<br>DBL_MIN<br>LDBL_MIN | minimum normalized positive value of {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }} | {{dsc macro const | FLT_MIN<br>DBL_MIN<br>LDBL_MIN | minimum normalized positive value of {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }} | ||
{{dsc macro const | FLT_TRUE_MIN<br>DBL_TRUE_MIN<br>LDBL_TRUE_MIN | minimum positive value of {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true |notes={{mark c++17}}}} | {{dsc macro const | FLT_TRUE_MIN<br>DBL_TRUE_MIN<br>LDBL_TRUE_MIN | minimum positive value of {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true |notes={{mark c++17}}}} | ||
Revision as of 07:57, 28 September 2016
See also std::numeric_limits interface.
| Defined in header
<cstdint> | |
| PTRDIFF_MIN (C++11) |
minimum value of object of std::ptrdiff_t type (macro constant) |
| PTRDIFF_MAX (C++11) |
maximum value of object of std::ptrdiff_t type (macro constant) |
| SIZE_MAX (C++11) |
maximum value of object of std::size_t type (macro constant) |
| SIG_ATOMIC_MIN (C++11) |
minimum value of object of std::sig_atomic_t type (macro constant) |
| SIG_ATOMIC_MAX (C++11) |
maximum value of object of std::sig_atomic_t type (macro constant) |
| WCHAR_MIN (C++11) |
minimum value of object of wchar_t type (macro constant) |
| WCHAR_MAX (C++11) |
maximum value of object of wchar_t type (macro constant) |
| WINT_MIN (C++11) |
minimum value of object of std::wint_t type (macro constant) |
| WINT_MAX (C++11) |
maximum value of object of std::wint_t type (macro constant) |
Limits of integer types
| Defined in header
<climits> | |
| CHAR_BIT |
number of bits in byte (macro constant) |
| MB_LEN_MAX |
maximum number of bytes in a multibyte character (macro constant) |
| CHAR_MIN |
minimum value of char (macro constant) |
| CHAR_MAX |
maximum value of char (macro constant) |
| SCHAR_MINSHRT_MININT_MINLONG_MINLLONG_MIN (C++11) |
minimum value of signed char, short, int, long and long long respectively (macro constant) |
| SCHAR_MAXSHRT_MAXINT_MAXLONG_MAXLLONG_MAX (C++11) |
maximum value of signed char, short, int, long and long long respectively (macro constant) |
| UCHAR_MAXUSHRT_MAXUINT_MAXULONG_MAXULLONG_MAX (C++11) |
maximum value of unsigned char, unsigned short, unsigned int, unsigned long and unsigned long long respectively (macro constant) |
Limits of floating point types
| Defined in header
<cfloat> | |
| FLT_RADIX |
the radix (integer base) used by the representation of all three floating-point types (macro constant) |
| DECIMAL_DIG (C++11) |
conversion from long double to decimal with at least DECIMAL_DIG digits and back to long double is the identity conversion. : this is the decimal precision required to serialize/deserialize a long double (see also std::numeric_limits::max_digits10) (macro constant) |
| FLT_DECIMAL_DIGDBL_DECIMAL_DIGLDBL_DECIMAL_DIG (C++17) |
conversion from float/double/long double to decimal with at least FLT_DECIMAL_DIG/DBL_DECIMAL_DIG/LDBL_DECIMAL_DIG digits and back is the identity conversion. : this is the decimal precision required to serialize/deserialize a floating-point value (see also std::numeric_limits::max_digits10). Defined to at least 6, 10, and 10 respectively, or 9 for IEEE float and 17 for IEEE double. (macro constant) |
| FLT_MINDBL_MINLDBL_MIN |
minimum normalized positive value of float, double and long double respectively (macro constant) |
| FLT_TRUE_MINDBL_TRUE_MINLDBL_TRUE_MIN (C++17) |
minimum positive value of float, double and long double respectively (macro constant) |
| FLT_MAXDBL_MAXLDBL_MAX |
maximum value of float, double and long double respectively (macro constant) |
| FLT_EPSILONDBL_EPSILONLDBL_EPSILON |
difference between 1.0 and the next representable value for float, double and long double respectively (macro constant) |
| FLT_DIGDBL_DIGLDBL_DIG |
number of decimal digits that are guaranteed to be preserved in text -> float/double/long double -> text roundtrip without change due to rounding or overflow (see std::numeric_limits::digits10 for explanation) (macro constant) |
| FLT_MANT_DIGDBL_MANT_DIGLDBL_MANT_DIG |
number of base FLT_RADIX digits that can be represented without losing precision for float, double and long double respectively (macro constant) |
| FLT_MIN_EXPDBL_MIN_EXPLDBL_MIN_EXP |
minimum negative integer such that FLT_RADIX raised by power one less than that integer is a normalized float, double and long double respectively (macro constant) |
| FLT_MIN_10_EXPDBL_MIN_10_EXPLDBL_MIN_10_EXP |
minimum negative integer such that 10 raised by power one less than that integer is a normalized float, double and long double respectively (macro constant) |
| FLT_MAX_EXPDBL_MAX_EXPLDBL_MAX_EXP |
maximum positive integer such that FLT_RADIX raised by power one more than that integer is a normalized float, double and long double respectively (macro constant) |
| FLT_MAX_10_EXPDBL_MAX_10_EXPLDBL_MAX_10_EXP |
maximum positive integer such that 10 raised by power one more than that integer is a normalized float, double and long double respectively (macro constant) |
| default rounding mode of floating-point arithmetics (macro constant) | |
| (C++11) |
specifies in what precision all arithmetic operations are done (macro constant) |
| FLT_HAS_SUBNORMDBL_HAS_SUBNORMLDBL_HAS_SUBNORM (C++17) |
specifies whether the type supports subnormal (denormal) numbers: -1 indeterminable, 0 absent, 1 present (macro constant) |
