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Difference between revisions of "cpp/types/climits"

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< cpp‎ | types
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{{dsc begin}}
 
{{dsc begin}}
 
{{dsc header | cstdint}}
 
{{dsc header | cstdint}}
−
{{dsc macro const | PTRDIFF_MIN | minimum value of object of {{lc|std::ptrdiff_t}} type | notes={{mark c++11}} | nolink=true}}
+
{{dsc inc | cpp/types/dsc PTRDIFF_MIN }}
−
{{dsc macro const | PTRDIFF_MAX | maximum value of object of {{lc|std::ptrdiff_t}} type | notes={{mark c++11}} | nolink=true}}
+
{{dsc inc | cpp/types/dsc PTRDIFF_MAX }}
−
{{dsc macro const | SIZE_MAX | maximum value of object of {{lc|std::size_t}} type | notes={{mark c++11}} | nolink=true}}
+
{{dsc inc | cpp/types/dsc SIZE_MAX }}
−
{{dsc macro const | SIG_ATOMIC_MIN | minimum value of object of {{lc|std::sig_atomic_t}} type | notes={{mark c++11}} | nolink=true}}
+
{{dsc inc | cpp/types/dsc SIG_ATOMIC_MIN }}
−
{{dsc macro const | SIG_ATOMIC_MAX | maximum value of object of {{lc|std::sig_atomic_t}} type | notes={{mark c++11}} | nolink=true}}
+
{{dsc inc | cpp/types/dsc SIG_ATOMIC_MAX }}
−
{{dsc macro const | WCHAR_MIN | minimum value of object of {{c|wchar_t}} type | notes={{mark c++11}} | nolink=true}}
+
{{dsc inc | cpp/types/dsc WCHAR_MIN }}
−
{{dsc macro const | WCHAR_MAX | maximum value of object of {{c|wchar_t}} type | notes={{mark c++11}} | nolink=true}}
+
{{dsc inc | cpp/types/dsc WCHAR_MAX }}
−
{{dsc macro const | WINT_MIN | minimum value of object of {{c|std::wint_t}} type | notes={{mark c++11}} | nolink=true}}
+
{{dsc inc | cpp/types/dsc WINT_MIN }}
−
{{dsc macro const | WINT_MAX | maximum value of object of {{c|std::wint_t}} type | notes={{mark c++11}} | nolink=true}}
+
{{dsc inc | cpp/types/dsc WINT_MAX}}
 
{{dsc end}}
 
{{dsc end}}
  
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{{dsc begin}}
 
{{dsc begin}}
 
{{dsc header | climits}}
 
{{dsc header | climits}}
−
{{dsc macro const | CHAR_BIT | number of bits in byte | nolink=true }}
+
{{dsc inc | cpp/types/dsc CHAR_BIT }}
−
{{dsc macro const | MB_LEN_MAX | maximum number of bytes in a multibyte character | nolink=true }}
+
{{dsc inc | cpp/types/dsc MB_LEN_MAX }}
−
{{dsc macro const | CHAR_MIN | minimum value of {{c|char}} | nolink=true }}
+
{{dsc inc | cpp/types/dsc CHAR_MIN}}
−
{{dsc macro const | CHAR_MAX | maximum value of {{c|char}} | nolink=true }}
+
{{dsc inc | cpp/types/dsc CHAR_MAX }}
−
{{dsc macro const | SCHAR_MIN<br>SHRT_MIN<br>INT_MIN<br>LONG_MIN<br>LLONG_MIN | nolink=true | notes=<br><br><br><br>{{mark c++11}} | minimum value of {{c|signed char}}, {{c|short}}, {{c|int}}, {{c|long}} and {{c|long long}} respectively}}
+
{{dsc inc | cpp/types/dsc signed_MIN}}
−
{{dsc macro const | SCHAR_MAX<br>SHRT_MAX<br>INT_MAX<br>LONG_MAX<br>LLONG_MAX | nolink=true | notes=<br><br><br><br>{{mark c++11}} | maximum value of {{c|signed char}}, {{c|short}}, {{c|int}}, {{c|long}} and {{c|long long}} respectively}}
+
{{dsc inc | cpp/types/dsc signed_MAX}}
−
{{dsc macro const | UCHAR_MAX<br>USHRT_MAX<br>UINT_MAX<br>ULONG_MAX<br>ULLONG_MAX | nolink=true | notes=<br><br><br><br>{{mark c++11}} | maximum value of {{c|unsigned char}}, {{c|unsigned short}}, {{c|unsigned int}},<br>{{c|unsigned long}} and {{c|unsigned long long}} respectively}}
+
{{dsc inc | cpp/types/dsc unsigned_MAX}}
−
{{dsc end}}
+
  
 
===Limits of floating point types===
 
===Limits of floating point types===
 
{{dsc begin}}
 
{{dsc begin}}
 
{{dsc header | cfloat}}
 
{{dsc header | cfloat}}
−
{{dsc macro const | FLT_RADIX | the radix (integer base) used by the representation of all three floating-point types | nolink=true }}
+
{{dsc inc | cpp/types/dsc FLT_RADIX }}
−
{{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 inc | cpp/types/dsc DECIMAL_DIG }}
−
{{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 inc | cpp/types/dsc fp_DECIMAL_DIG}}
−
{{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 inc | cpp/types/dsc fp_MIN}}
−
{{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 inc | cpp/types/dsc fp_TRUE_MIN}}
−
{{dsc macro const | FLT_MAX<br>DBL_MAX<br>LDBL_MAX | maximum value of {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }}
+
{{dsc inc | cpp/types/dsc fp_MAX}}
−
{{dsc macro const | FLT_EPSILON<br>DBL_EPSILON<br>LDBL_EPSILON | difference between {{c|1.0}} and the next representable value for {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }}
+
{{dsc inc | cpp/types/dsc fp_EPSILON}}
−
{{dsc macro const | FLT_DIG<br>DBL_DIG<br>LDBL_DIG | number of decimal digits that are guaranteed to be preserved in text -> {{c|float}}/{{c|double}}/{{c|long double}} -> text roundtrip without change due to rounding or overflow (see {{lc|std::numeric_limits::digits10}} for explanation) | nolink=true }}
+
{{dsc inc | cpp/types/dsc fp_DIG}}
−
{{dsc macro const | FLT_MANT_DIG<br>DBL_MANT_DIG<br>LDBL_MANT_DIG | number of base {{tt|FLT_RADIX}} digits that can be represented without losing precision for {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }}
+
{{dsc inc | cpp/types/dsc fp_MANT_DIG}}
−
{{dsc macro const | FLT_MIN_EXP<br>DBL_MIN_EXP<br>LDBL_MIN_EXP | minimum negative integer such that {{tt|FLT_RADIX}} raised by power one less than that integer is a normalized {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }}
+
{{dsc inc | cpp/types/dsc fp_MIN_EXP}}
−
{{dsc macro const | FLT_MIN_10_EXP<br>DBL_MIN_10_EXP<br>LDBL_MIN_10_EXP | minimum negative integer such that {{c|10}} raised by power one less than that integer is a normalized {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }}
+
{{dsc inc | cpp/types/dsc fp_MIN_10_EXP}}
−
{{dsc macro const | FLT_MAX_EXP<br>DBL_MAX_EXP<br>LDBL_MAX_EXP | maximum positive integer such that {{tt|FLT_RADIX}} raised by power one more than that integer is a normalized {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }}
+
{{dsc inc | cpp/types/dsc fp_MAX_EXP}}
−
{{dsc macro const | FLT_MAX_10_EXP<br>DBL_MAX_10_EXP<br>LDBL_MAX_10_EXP | maximum positive integer such that {{c|10}} raised by power one more than that integer is a normalized {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }}
+
{{dsc inc | cpp/types/dsc fp_MAX_10_EXP}}
−
{{dsc macro const | cpp/types/climits/FLT_ROUNDS | default rounding mode of floating-point arithmetics }}
+
{{dsc inc | cpp/types/dsc FLT_ROUNDS }}
−
{{dsc macro const | cpp/types/climits/FLT_EVAL_METHOD | specifies in what precision all arithmetic operations are done | notes={{mark c++11}} }}
+
{{dsc inc | cpp/types/dsc FLT_EVAL_METHOD }}
−
{{dsc macro const | FLT_HAS_SUBNORM<br>DBL_HAS_SUBNORM<br>LDBL_HAS_SUBNORM | specifies whether the type supports subnormal ([[enwiki:Denormal number|denormal]]) numbers: -1 indeterminable, 0 absent, 1 present | nolink=true | notes={{mark c++17}}}}
+
{{dsc inc | cpp/types/dsc fp_HAS_SUBNORM }}
 
{{dsc end}}
 
{{dsc end}}
  

Revision as of 13:07, 20 December 2016

 
C++
 
Utilities library
General utilities
Relational operators (deprecated in C++20)
 
Type support
Basic types
Fixed width integer types (C++11)
Fixed width floating-point types (C++23)
(C++11)    
(C++17)
Numeric limits
C numeric limits interface
Runtime type information
 

See also std::numeric_limits interface.

Defined in header <cstdint>
PTRDIFF_MIN
(C++11)
 minimum value of std::ptrdiff_t
(macro constant) [edit]
PTRDIFF_MAX
(C++11)
 maximum value of std::ptrdiff_t
(macro constant) [edit]
SIZE_MAX
(C++11)
 maximum value of std::size_t
(macro constant) [edit]
SIG_ATOMIC_MIN
(C++11)
 minimum value of std::sig_atomic_t
(macro constant) [edit]
SIG_ATOMIC_MAX
(C++11)
 maximum value of std::sig_atomic_t
(macro constant) [edit]
WCHAR_MIN
(C++11)
 minimum value of wchar_t
(macro constant) [edit]
WCHAR_MAX
(C++11)
 maximum value of wchar_t
(macro constant) [edit]
WINT_MIN
(C++11)
 minimum value of std::wint_t
(macro constant) [edit]
WINT_MAX
(C++11)
 maximum value of std::wint_t
(macro constant) [edit]

Limits of integer types

Limits of floating point types

Defined in header <climits>
CHAR_BIT
 number of bits in a byte
(macro constant) [edit]
MB_LEN_MAX
 maximum number of bytes in a multibyte character
(macro constant) [edit]
CHAR_MIN
 minimum value of char
(macro constant) [edit]
CHAR_MAX
 maximum value of char
(macro constant) [edit]
SCHAR_MINSHRT_MININT_MINLONG_MINLLONG_MIN
(C++11)
 minimum value of signed char, short, int, long and long long respectively
(macro constant) [edit]
SCHAR_MAXSHRT_MAXINT_MAXLONG_MAXLLONG_MAX
(C++11)
 maximum value of signed char, short, int, long and long long respectively
(macro constant) [edit]
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) [edit]
Defined in header <cfloat>
FLT_RADIX
 the radix (integer base) used by the representation of all three floating-point types
(macro constant) [edit]
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) [edit]
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) [edit]
FLT_MINDBL_MINLDBL_MIN
 minimum normalized positive value of float, double and long double respectively
(macro constant) [edit]
FLT_TRUE_MINDBL_TRUE_MINLDBL_TRUE_MIN
(C++17)
 minimum positive value of float, double and long double respectively
(macro constant) [edit]
FLT_MAXDBL_MAXLDBL_MAX
 maximum finite value of float, double and long double respectively
(macro constant) [edit]
FLT_EPSILONDBL_EPSILONLDBL_EPSILON
 difference between 1.0 and the next representable value for float, double and long double respectively
(macro constant) [edit]
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) [edit]
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) [edit]
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) [edit]
FLT_MIN_10_EXPDBL_MIN_10_EXPLDBL_MIN_10_EXP
 minimum negative integer such that 10 raised to that power is a normalized float, double and long double respectively
(macro constant) [edit]
FLT_MAX_EXPDBL_MAX_EXPLDBL_MAX_EXP
 maximum positive integer such that FLT_RADIX raised by power one less than that integer is a representable finite float, double and long double respectively
(macro constant) [edit]
FLT_MAX_10_EXPDBL_MAX_10_EXPLDBL_MAX_10_EXP
 maximum positive integer such that 10 raised to that power is a representable finite float, double and long double respectively
(macro constant) [edit]
default rounding mode of floating-point arithmetic
(macro constant) [edit]
(C++11)
 specifies in what precision all arithmetic operations are done
(macro constant) [edit]
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) [edit]

See also

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