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Diffstat (limited to 'man3/abs.3')
| -rw-r--r-- | man3/abs.3 | 49 |
1 files changed, 39 insertions, 10 deletions
diff --git a/man3/abs.3 b/man3/abs.3 index 94d1e82645..f20411d008 100644 --- a/man3/abs.3 +++ b/man3/abs.3 @@ -47,9 +47,15 @@ abs, labs, llabs, imaxabs \- compute the absolute value of an integer .BI "intmax_t imaxabs(intmax_t " j ); .fi .SH DESCRIPTION -The \fBabs\fP() function computes the absolute value of the integer +The +.BR abs () +function computes the absolute value of the integer argument \fIj\fP. -The \fBlabs\fP(), \fBllabs\fP() and \fBimaxabs\fP() +The +.BR labs (), +.BR llabs () +and +.BR imaxabs () functions compute the absolute value of the argument \fIj\fP of the appropriate integer type for the function. .SH "RETURN VALUE" @@ -57,25 +63,48 @@ Returns the absolute value of the integer argument, of the appropriate integer type for the function. .SH "CONFORMING TO" SVr4, POSIX.1-2001, 4.3BSD, C99. -.\" POSIX.1 (1996 edition) only requires the \fBabs\fP() function. +.\" POSIX.1 (1996 edition) only requires the +.BR abs () +function. C89 only -includes the \fBabs\fP() and \fBlabs\fP() functions; the functions -\fBllabs\fP() and \fBimaxabs\fP() were added in C99. +includes the +.BR abs () +and +.BR labs () +functions; the functions +.BR llabs () +and +.BR imaxabs () +were added in C99. .SH NOTES Trying to take the absolute value of the most negative integer is not defined. .PP -The \fBllabs\fP() function is included in glibc since version 2.0, but +The +.BR llabs () +function is included in glibc since version 2.0, but is not in libc5 or libc4. -The \fBimaxabs\fP() function is included in +The +.BR imaxabs () +function is included in glibc since version 2.1.1. .PP -For \fBllabs\fP() to be declared, it may be necessary to define +For +.BR llabs () +to be declared, it may be necessary to define \fB_ISOC99_SOURCE\fP or \fB_ISOC9X_SOURCE\fP (depending on the version of glibc) before including any standard headers. .PP -GCC handles \fBabs\fP() and \fBlabs\fP() as builtin functions. -GCC 3.0 also handles \fBllabs\fP() and \fBimaxabs\fP() as builtins. +GCC handles +.BR abs () +and +.BR labs () +as builtin functions. +GCC 3.0 also handles +.BR llabs () +and +.BR imaxabs () +as builtins. .SH "SEE ALSO" .BR cabs (3), .BR ceil (3), |