debian man page for memins

MEMINS(3pub)						       C Programmer's Manual						      MEMINS(3pub)

NAME
       memins - insert bytes at beginning of memory block

SYNOPSIS
       #include <publib.h>
       void *memins(void *tgt, size_t tgtsize, const void *src, size_t srcsize);

DESCRIPTION
       memins  inserts	srcsize  bytes from src at the beginning of tgt, but moves the first tgtsize out of the way.  The source and target memory
       blocks must not overlap.

RETURN VALUE
       memins returns its first argument.

EXAMPLE
       To insert a new element at the ith position of an array, one might do the following.

	    int new, array[10];

	    memins(array+i, (10-i-1)*sizeof(array[0]), &new, sizeof(new));

       Please note that the above code carefully avoids the trap of moving the last element of the array past the end of the array.

SEE ALSO
       publib(3), strins(3)

AUTHOR
       Lars Wirzenius (lars.wirzenius@helsinki.fi)

Publib							       C Programmer's Manual						      MEMINS(3pub)