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- /* Copyright (C) 1989, 1992, 1993 Aladdin Enterprises. All rights reserved.
-
- This file is part of Aladdin Ghostscript.
-
- Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
- or distributor accepts any responsibility for the consequences of using it,
- or for whether it serves any particular purpose or works at all, unless he
- or she says so in writing. Refer to the Aladdin Ghostscript Free Public
- License (the "License") for full details.
-
- Every copy of Aladdin Ghostscript must include a copy of the License,
- normally in a plain ASCII text file named PUBLIC. The License grants you
- the right to copy, modify and redistribute Aladdin Ghostscript, but only
- under certain conditions described in the License. Among other things, the
- License requires that the copyright notice and this notice be preserved on
- all copies.
- */
-
- /* zarray.c */
- /* Array operators */
- #include "memory_.h"
- #include "ghost.h"
- #include "errors.h"
- #include "ialloc.h"
- #include "ipacked.h"
- #include "oper.h"
- #include "store.h"
-
- /* The generic operators (copy, get, put, getinterval, putinterval, */
- /* length, and forall) are implemented in zgeneric.c. */
-
- /* <int> array <array> */
- int
- zarray(register os_ptr op)
- { uint size;
- int code;
- check_int_leu(*op, max_array_size);
- size = op->value.intval;
- code = ialloc_ref_array((ref *)op, a_all, size, "array");
- if ( code < 0 )
- return code;
- refset_null(op->value.refs, size);
- return 0;
- }
-
- /* <array> aload <obj_0> ... <obj_n-1> <array> */
- int
- zaload(register os_ptr op)
- { ref aref;
- ref_assign(&aref, op);
- if ( !r_is_array(&aref) )
- return_error(e_typecheck);
- check_read(aref);
- #define asize r_size(&aref)
- if ( asize > ostop - op )
- { /* Use the slow, general algorithm. */
- int code = ref_stack_push(&o_stack, asize);
- uint i;
- const ref_packed *packed = aref.value.packed;
- if ( code < 0 )
- return code;
- for ( i = asize; i > 0; i--, packed = packed_next(packed) )
- packed_get(packed, ref_stack_index(&o_stack, i));
- *osp = aref;
- return 0;
- }
- if ( r_has_type(&aref, t_array) )
- memcpy((char *)op, (const char *)aref.value.refs,
- asize * sizeof(ref));
- else
- { register ushort i;
- const ref_packed *packed = aref.value.packed;
- os_ptr pdest = op;
- for ( i = 0; i < asize; i++, pdest++ )
- packed_get(packed, pdest),
- packed = packed_next(packed);
- }
- push(asize);
- #undef asize
- ref_assign(op, &aref);
- return 0;
- }
-
- /* <obj_0> ... <obj_n-1> <array> astore <array> */
- int
- zastore(register os_ptr op)
- { uint size;
- int code;
- check_type(*op, t_array);
- check_write(*op);
- size = r_size(op);
- if ( size > op - osbot )
- { /* The store operation might involve other stack segments. */
- ref arr;
- if ( size >= ref_stack_count(&o_stack) )
- return_error(e_stackunderflow);
- arr = *op;
- code = ref_stack_store(&o_stack, &arr, size, 1, 0, true,
- "astore");
- if ( code < 0 )
- return code;
- ref_stack_pop(&o_stack, size);
- *ref_stack_index(&o_stack, 0) = arr;
- }
- else
- { code = refcpy_to_old(op, 0, op - size, size, "astore");
- if ( code < 0 )
- return code;
- op[-(int)size] = *op;
- pop(size);
- }
- return 0;
- }
-
- /* ------ Initialization procedure ------ */
-
- op_def zarray_op_defs[] = {
- {"1aload", zaload},
- {"1array", zarray},
- {"1astore", zastore},
- op_def_end(0)
- };
-