oracular (3) memins.3pub.gz

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)