LRINT(3M) | Mathematical Library Functions | LRINT(3M) |

lrint, lrintf, lrintl - round to nearest integer value using current rounding direction

c99 [flag... ]file...-lm[library... ] #include <math.h>longlrint(doublex);

longlrintf(floatx);

longlrintl(long doublex);

These functions round their argument to the nearest integer value, rounding according to the current rounding direction.

Upon successful completion, these functions return the rounded integer
value.

If *x* is NaN, a domain error occurs and an unspecified value
is returned.

If *x* is +Inf, a domain error occurs and an unspecified
value is returned.

If *x* is −Inf, a domain error occurs and an
unspecified value is returned.

If the correct value is positive and too large to represent as a
**long**, a domain error occurs and an unspecified value is returned.

If the correct value is negative and too large to represent as a
**long**, a domain error occurs and an unspecified value is returned.

These functions will fail if:

**Domain Error**

The *x* argument is NaN or ±Inf, or the
correct value is not representable as an integer.

If the integer expression (**math_errhandling** &
**MATH_ERREXCEPT**) is non-zero, then the invalid floating-point
exception is raised.

An application wanting to check for exceptions should call
**feclearexcept**(**FE_ALL_EXCEPT**) before calling these functions.
On return, if **fetestexcept**(**FE_INVALID** | **FE_DIVBYZERO** |
**FE_OVERFLOW** | **FE_UNDERFLOW**) is non-zero, an exception has been
raised. An application should either examine the return value or check the
floating point exception flags to detect exceptions.

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE | ATTRIBUTE VALUE |

Interface Stability | Standard |

MT-Level | MT-Safe |

math.h(3HEAD), feclearexcept(3M), fetestexcept(3M), llrint(3M), attributes(7), standards(7)

July 12, 2006 | SunOS 5.11 |