NAME
        CINIT -- Initialize user copperlist to accept intermediate
                 user copper instructions.

   SYNOPSIS
        cl = CINIT( ucl , n )

        cl = UCopperListInit( ucl , n )
                              a0    d0

        struct coplist *ucopperlistinit( struct ucoplist *, uword );

   FUNCTION
        Allocates and/or initialize copperlist structures/buffers
        internal to a ucoplist structure.

        This is a macro that calls UCopListInit. You must pass a
        (non-initialized) ucoplist to cinit (cinit will not allocate
        a new ucoplist if ucl==0 ). if (ucl != 0) it will initialize the
        intermediate data buffers internal to a ucoplist.

        The maximum number of intermediate copper list instructions
        that these internal coplist data buffers contain is specified
        as the parameter n.

   INPUTS
        ucl - pointer to ucoplist structure
        n - number of instructions buffer must be able to hold

   RESULTS
        cl- a pointer to a buffer which will accept n intermediate copper
            instructions.

        NOTE: this is NOT a ucoplist pointer, rather a pointer to the
              UCopList's->FirstCopList sub-structure.

   BUGS
        CINIT will not actually allocate a new ucoplist if ucl==0.
        Instead you must allocate a block MEMF_PUBLIC|MEMF_CLEAR, the
        sizeof(struct UCopList) and pass it to this function.

        The system's freevportcoplists function will take care of
        deallocating it if they are called.

        Prior to release V36 the  CINIT macro had { } braces surrounding
        the definition, preventing the proper return of the result value.
        These braces have been removed for the V36 include definitions.

   SEE ALSO
        CINIT() CMOVE() CEND() graphics/copper.h