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/* Copyright (C) 1989, 1992, 1993, 1999 Aladdin Enterprises. All rights reserved.
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This software is provided AS-IS with no warranty, either express or
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implied.
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This software is distributed under license and may not be copied,
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modified or distributed except as expressly authorized under the terms
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of the license contained in the file LICENSE in this distribution.
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For more information about licensing, please refer to
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http://www.ghostscript.com/licensing/. For information on
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commercial licensing, go to http://www.artifex.com/licensing/ or
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contact Artifex Software, Inc., 101 Lucas Valley Road #110,
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San Rafael, CA 94903, U.S.A., +1(415)492-9861.
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*/
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/* $Id: zarray.c,v 1.5 2004/08/04 19:36:13 stefan Exp $ */
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/* Array operators */
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#include "memory_.h"
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#include "ghost.h"
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#include "ialloc.h"
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#include "ipacked.h"
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#include "oper.h"
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#include "store.h"
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/* The generic operators (copy, get, put, getinterval, putinterval, */
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/* length, and forall) are implemented in zgeneric.c. */
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/* <int> array <array> */
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int
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zarray(i_ctx_t *i_ctx_p)
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{
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os_ptr op = osp;
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uint size;
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int code;
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check_int_leu(*op, max_array_size);
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size = op->value.intval;
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code = ialloc_ref_array((ref *)op, a_all, size, "array");
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if (code < 0)
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return code;
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refset_null(op->value.refs, size);
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return 0;
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}
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/* <array> aload <obj_0> ... <obj_n-1> <array> */
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private int
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zaload(i_ctx_t *i_ctx_p)
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{
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os_ptr op = osp;
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ref aref;
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uint asize;
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ref_assign(&aref, op);
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if (!r_is_array(&aref))
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return_op_typecheck(op);
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check_read(aref);
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asize = r_size(&aref);
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if (asize > ostop - op) { /* Use the slow, general algorithm. */
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int code = ref_stack_push(&o_stack, asize);
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uint i;
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const ref_packed *packed = aref.value.packed;
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if (code < 0)
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return code;
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for (i = asize; i > 0; i--, packed = packed_next(packed))
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packed_get(imemory, packed, ref_stack_index(&o_stack, i));
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*osp = aref;
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return 0;
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}
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if (r_has_type(&aref, t_array))
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memcpy(op, aref.value.refs, asize * sizeof(ref));
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else {
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uint i;
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const ref_packed *packed = aref.value.packed;
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os_ptr pdest = op;
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for (i = 0; i < asize; i++, pdest++, packed = packed_next(packed))
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packed_get(imemory, packed, pdest);
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}
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push(asize);
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ref_assign(op, &aref);
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return 0;
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}
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/* <obj_0> ... <obj_n-1> <array> astore <array> */
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private int
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zastore(i_ctx_t *i_ctx_p)
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{
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os_ptr op = osp;
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uint size;
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int code;
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check_write_type(*op, t_array);
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size = r_size(op);
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if (size > op - osbot) {
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/* The store operation might involve other stack segments. */
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ref arr;
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if (size >= ref_stack_count(&o_stack))
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return_error(e_stackunderflow);
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arr = *op;
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code = ref_stack_store(&o_stack, &arr, size, 1, 0, true, idmemory,
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"astore");
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if (code < 0)
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return code;
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ref_stack_pop(&o_stack, size);
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*ref_stack_index(&o_stack, 0) = arr;
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} else {
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code = refcpy_to_old(op, 0, op - size, size, idmemory, "astore");
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if (code < 0)
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return code;
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op[-(int)size] = *op;
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pop(size);
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}
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return 0;
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}
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/* ------ Initialization procedure ------ */
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const op_def zarray_op_defs[] =
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{
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{"1aload", zaload},
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{"1array", zarray},
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{"1astore", zastore},
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op_def_end(0)
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};
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