reallocarr(3) - NetBSD Manual Pages

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REALLOCARR(3)           NetBSD Library Functions Manual          REALLOCARR(3)


NAME

     reallocarr -- reallocate array


SYNOPSIS

     #include <stdlib.h>

     int
     reallocarr(void *ptr, size_t number, size_t size);


DESCRIPTION

     The reallocarr function reallocates the memory in *ptr.


RETURN VALUES

     On successful completion, returns 0 and updates *ptr.  Otherwise, an
     error code (see errno(2)) is returned and *ptr and the referenced memory
     is unmodified.


EXAMPLES

     The following uses reallocarr() to initialize an array of INITSIZE inte-
     gers, then resizes it to NEWSIZE elements:

           int *data = NULL;
           int ret = 0;

           ret = reallocarr(&data, INITSIZE, sizeof(*data));
           if (ret)
               errc(1, ret, "reallocarr failed");

           ret = reallocarr(&data, NEWSIZE, sizeof(*data));
           if (ret)
               errc(1, ret, "reallocarr failed on resize");


SEE ALSO

     calloc(3)


HISTORY

     reallocarr first appeared in NetBSD 7.0.  OpenBSD introduced the
     reallocarray(3) function for the same purpose, but the interface makes it
     difficult to correctly handle zero-sized allocations.

NetBSD 9.0                     February 19, 2015                    NetBSD 9.0