NAME
        InternalLoadSeg -- Low-level load routine (V36)

   SYNOPSIS
        seglist = InternalLoadSeg(fh,table,functionarray,stack)
        D0                        D0  A0        A1        A2

        bptr internalloadseg(bptr,bptr,long *,long *)

   FUNCTION
        Loads from fh.  Table is used when loading an overlay, otherwise
        should be NULL.  Functionarray is a pointer to an array of functions.
        Note that the current seek position after loading may be at any point
        after the last hunk loaded.  The filehandle will not be closed.  If a
        stacksize is encoded in the file, the size will be stuffed in the
        long pointed to by stack.  this long should be initialized to your
        default value: InternalLoadSeg() will not change it if no stacksize
        is found. Clears unused portions of Code and Data hunks (as well as
        BSS hunks).  (This also applies to loadseg() and newloadseg()).

        If the file being loaded is an overlaid file, this will return
        -(seglist).  All other results will be positive.

        NOTE to overlay users: InternalLoadSeg() does NOT return seglist in
        both D0 and D1, as loadseg does.  the current ovs.asm uses loadseg(),
        and assumes returns are in D1.  We will support this for loadseg()
        ONLY.

   INPUTS
        fh            - Filehandle to load from.
        table         - When loading an overlay, otherwise ignored.
        functionarray - Array of function to be used for read, alloc, and free.
           FuncTable[0] ->  Actual = ReadFunc(readhandle,buffer,length),DOSBase
                            D0                D1         D2     D3      A6
           FuncTable[1] ->  Memory = AllocFunc(size,flags), Execbase
                            D0                 D0   D1      a6
           FuncTable[2] ->  FreeFunc(memory,size), Execbase
                                     A1     D0     A6
        stack         - Pointer to storage (ULONG) for stacksize.

   RESULT
        seglist       - Seglist loaded or NULL.  NOT returned in D1!

   BUGS
        Really should use tags.

   SEE ALSO
        loadseg(), unloadseg(), newloadseg(), internalunloadseg()