l3tol.3

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 3 代码 · 共 49 行

.\" SCCSID: @(#)l3tol.3	8.1	9/11/90
.TH l3tol 3 
.SH Name
l3tol, ltol3 \- convert between 3-byte integers and long integers
.SH Syntax
.B void l3tol (lp, cp, n)
.br
.B long \(**lp;
.br
.B char \(**cp;
.br
.B int n;
.PP
.B void ltol3 (cp, lp, n)
.br
.B char \(**cp;
.br
.B long \(**lp;
.br
.B int n;
.SH Description
.NXR "l3tol subroutine"
.NXR "ltol3 subroutine"
.NXR "file system" "maintaining"
The
.PN l3tol
subroutine converts a list of
.I n\^
three-byte integers packed into a character string
pointed to by 
.I cp\^
into a list of long integers pointed to by
.IR lp .
.PP
The
.PN ltol3
performs the reverse conversion from long integers
.RI ( lp )
to three-byte integers
.RI ( cp ).
.PP
These functions are useful for file-system maintenance
where the block numbers are three bytes long.
.SH Restrictions
Because of possible differences in byte ordering,
the numerical values of the long integers are machine-dependent.
.SH See Also
fs(5)