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.TH LIBSIMPLE_MEMRELEM_INV 3 2018-11-24 libsimple
.SH NAME
libsimple_memrelem_inv \- find different aligned byte string in memory
.SH SYNOPSIS
.nf
#include <libsimple.h>
void *libsimple_memrelem_inv(const void *\fIhaystack\fP, size_t \fInhaystack\fP, const void *\fIneedle\fP, size_t \fInneedle\fP);
#ifndef memrelem_inv
# define memrelem_inv libsimple_memrelem_inv
#endif
.fi
.PP
Link with
.IR \-lsimple .
.SH DESCRIPTION
The
.BR libsimple_memrelem_inv ()
function scans the memory segment
.IR haystack ,
with the size
.IR nhaystack*nneedle ,
for the last occurence of a byte string
different from
.I needle
with the size
.IR nneedle ,
and with an offset equivalent to zero modulo
.IR nneedle .
.PP
The comparison is case-sensitive.
.SH RETURN VALUE
The
.BR libsimple_memrelem_inv ()
function returns the pointer
.I s
with a maximal offset such that
.IR memcmp(r,needle,nneedle) ,
where
.I r
is the returned pointer, and such that
the offset is equivalent to zero modulo
.IR nneedle .
If no such offset exists,
.B NULL
is returned.
.SH ERRORS
The
.BR libsimple_memrelem_inv ()
function cannot fail.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lb lb lb
l l l.
Interface Attribute Value
T{
.BR libsimple_memrelem_inv ()
T} Thread safety MT-Safe
T{
.BR libsimple_memrelem_inv ()
T} Async-signal safety AS-Safe
T{
.BR libsimple_memrelem_inv ()
T} Async-cancel safety AC-Safe
.TE
.SH EXAMPLES
None.
.SH APPLICATION USAGE
None.
.SH RATIONALE
None.
.SH FUTURE DIRECTIONS
None.
.SH NOTES
None.
.SH BUGS
None.
.SH SEE ALSO
.BR libsimple_memrelem (3),
.BR libsimple_memelem_inv (3),
.BR libsimple_memrmem_inv (3),
.BR libsimple_memrchr_inv (3)
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