/* Copyright (C) 1994 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.
*/

/* zsysvm.c */
/* System VM and VM-specific operators */
#include "ghost.h"
#include "oper.h"
#include "ialloc.h"
#include "ivmspace.h"
#include "store.h"			/* for make_bool */

/*
 * These operators allow creation of objects in a specific VM --
 * local, global, or system.  System VM, which is not a standard PostScript
 * facility, is not subject to save and restore; objects in system VM
 * may only refer to simple objects or to other (composite) objects
 * in system VM.
 */
extern int zarray(P1(os_ptr));
extern int zdict(P1(os_ptr));
extern int zpackedarray(P1(os_ptr));
extern int zstring(P1(os_ptr));

/* Execute an operator with a specific VM selected as current VM. */
private int
specific_vm_op(os_ptr op, int (*opproc)(P1(os_ptr)), uint space)
{	uint save_space = icurrent_space;
	int code;
	ialloc_set_space(idmemory, avm_system);
	code = (*opproc)(op);
	ialloc_set_space(idmemory, save_space);
	return code;
}

/* <int> .globalvmarray <array> */
private int
zglobalvmarray(os_ptr op)
{	return specific_vm_op(op, zarray, avm_global);
}

/* <int> .globalvmdict <dict> */
private int
zglobalvmdict(os_ptr op)
{	return specific_vm_op(op, zdict, avm_global);
}

/* <obj_0> ... <obj_n-1> <n> .globalvmpackedarray <packedarray> */
private int
zglobalvmpackedarray(os_ptr op)
{	return specific_vm_op(op, zpackedarray, avm_global);
}

/* <int> .globalvmstring <string> */
private int
zglobalvmstring(os_ptr op)
{	return specific_vm_op(op, zstring, avm_global);
}

/* <int> .localvmarray <array> */
private int
zlocalvmarray(os_ptr op)
{	return specific_vm_op(op, zarray, avm_local);
}

/* <int> .localvmdict <dict> */
private int
zlocalvmdict(os_ptr op)
{	return specific_vm_op(op, zdict, avm_local);
}

/* <obj_0> ... <obj_n-1> <n> .localvmpackedarray <packedarray> */
private int
zlocalvmpackedarray(os_ptr op)
{	return specific_vm_op(op, zpackedarray, avm_local);
}

/* <int> .localvmstring <string> */
private int
zlocalvmstring(os_ptr op)
{	return specific_vm_op(op, zstring, avm_local);
}

/* <int> .systemvmarray <array> */
private int
zsystemvmarray(os_ptr op)
{	return specific_vm_op(op, zarray, avm_system);
}

/* <int> .systemvmdict <dict> */
private int
zsystemvmdict(os_ptr op)
{	return specific_vm_op(op, zdict, avm_system);
}

/* <obj_0> ... <obj_n-1> <n> .systemvmpackedarray <packedarray> */
private int
zsystemvmpackedarray(os_ptr op)
{	return specific_vm_op(op, zpackedarray, avm_system);
}

/* <int> .systemvmstring <string> */
private int
zsystemvmstring(os_ptr op)
{	return specific_vm_op(op, zstring, avm_system);
}

/* <any> .systemvmcheck <bool> */
int
zsystemvmcheck(register os_ptr op)
{	make_bool(op, (r_space(op) == avm_system ? true : false));
	return 0;
}

/* ------ Initialization procedure ------ */

BEGIN_OP_DEFS(zsysvm_op_defs) {
	{"1.globalvmarray", zglobalvmarray},
	{"1.globalvmdict", zglobalvmdict},
	{"1.globalvmpackedarray", zglobalvmpackedarray},
	{"1.globalvmstring", zglobalvmstring},
	{"1.localvmarray", zlocalvmarray},
	{"1.localvmdict", zlocalvmdict},
	{"1.localvmpackedarray", zlocalvmpackedarray},
	{"1.localvmstring", zlocalvmstring},
	{"1.systemvmarray", zsystemvmarray},
	{"1.systemvmcheck", zsystemvmcheck},
	{"1.systemvmdict", zsystemvmdict},
	{"1.systemvmpackedarray", zsystemvmpackedarray},
	{"1.systemvmstring", zsystemvmstring},
END_OP_DEFS(0) }