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NAME

       alloc - allocate memory

SYNTAX

       #include <alloc.h>

       char *alloc(new);

       void alloc_free(x);

       void alloc_re(&x,old,new);

       char *x;
       unsigned int old;
       unsigned int new;

DESCRIPTION

       alloc  allocates  enough space from the heap for new bytes of data, adequately aligned for
       any data type.  new may be 0.  alloc returns a pointer to the  space.   If  space  is  not
       available, alloc returns 0, setting errno appropriately.

       alloc_free returns space to the heap.

       alloc_re  expands  the space allocated to x from old bytes to new bytes.  It allocates new
       space, copies old bytes from the old space to the new space, returns the old space to  the
       heap,  and  changes  x  to  point  to  the new space.  It then returns 1.  If space is not
       available, alloc_re returns 0, leaving the old space alone.

SEE ALSO

       sbrk(2), malloc(3), error(3)

                                                                                         alloc(3)