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- /* Copyright (C) 1989, 1992 Aladdin Enterprises. All rights reserved.
- Distributed by Free Software Foundation, Inc.
-
- This file is part of Ghostscript.
-
- Ghostscript is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY. No author or distributor accepts responsibility
- to anyone for the consequences of using it or for whether it serves any
- particular purpose or works at all, unless he says so in writing. Refer
- to the Ghostscript General Public License for full details.
-
- Everyone is granted permission to copy, modify and redistribute
- Ghostscript, but only under the conditions described in the Ghostscript
- General Public License. A copy of this license is supposed to have been
- given to you along with Ghostscript so you can know your rights and
- responsibilities. It should be in a file named COPYING. Among other
- things, the copyright notice and this notice must be preserved on all
- copies. */
-
- /* zarray.c */
- /* Array operators for GhostScript */
- #include "memory_.h"
- #include "ghost.h"
- #include "alloc.h"
- #include "errors.h"
- #include "oper.h"
- #include "packed.h"
- #include "store.h"
-
- /* The generic operators (copy, get, put, getinterval, putinterval, */
- /* length, and forall) are implemented in zgeneric.c. */
-
- /* Forward references */
- private int make_array(P4(os_ptr, int, int, const char *));
-
- /* array */
- int
- zarray(register os_ptr op)
- { int code = make_array(op, t_array, a_all, "array");
- if ( code < 0 ) return code;
- refset_null(op->value.refs, r_size(op));
- return 0;
- }
-
- /* aload */
- int
- zaload(register os_ptr op)
- { ref aref;
- int type;
- ref_assign(&aref, op);
- switch ( (type = r_type(&aref)) )
- {
- default: return e_typecheck;
- case t_array: case t_mixedarray: case t_shortarray: ;
- }
- check_read(aref);
- #define asize r_size(&aref)
- if ( asize > ostop - op ) return e_rangecheck;
- if ( type == t_array )
- memcpy((char *)op, (const char *)aref.value.refs,
- asize * sizeof(ref));
- else
- { register ushort i;
- const ref_packed *packed =
- (const ref_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;
- }
-
- /* astore */
- int
- zastore(register os_ptr op)
- { uint size;
- check_type(*op, t_array);
- check_write(*op);
- size = r_size(op);
- if ( size > op - osbot ) return e_stackunderflow;
- refcpy_to_old(op->value.refs, op - size, size, "astore");
- 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)
- };
-
- /* ------ Internal procedures ------ */
-
- /* Make an array from the operand stack. */
- /* Don't fill it in. */
- private int
- make_array(register os_ptr op, int type, int attrs, const char *client_name)
- { ref *abody;
- uint size;
- check_type(*op, t_integer);
- if ( op->value.intval < 0 ||
- op->value.intval > max_uint / sizeof(ref) - 1
- )
- return e_rangecheck;
- size = op->value.intval;
- abody = alloc_refs(size, client_name);
- if ( abody == 0 ) return e_VMerror;
- make_tasv(op, type, attrs, size, refs, abody);
- return 0;
- }
-