/* Portions Copyright (C) 2001 artofcode LLC.
   Portions Copyright (C) 1996, 2001 Artifex Software Inc.
   Portions Copyright (C) 1988, 2000 Aladdin Enterprises.
   This software is based in part on the work of the Independent JPEG Group.
   All Rights Reserved.

   This software is distributed under license and may not be copied, modified
   or distributed except as expressly authorized under the terms of that
   license.  Refer to licensing information at http://www.artifex.com/ or
   contact Artifex Software, Inc., 101 Lucas Valley Road #110,
   San Rafael, CA  94903, (415)492-9861, for further information. */

/*$RCSfile: zsysvm.c,v $ $Revision: 1.8 $ */
/* 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.
 */

/* Execute an operator with a specific VM selected as current VM. */
private int
specific_vm_op(i_ctx_t *i_ctx_p, op_proc_t opproc, uint space)
{
    uint save_space = icurrent_space;
    int code;

    ialloc_set_space(idmemory, space);
    code = opproc(i_ctx_p);
    ialloc_set_space(idmemory, save_space);
    return code;
}

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

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

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

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

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

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

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

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

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

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

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

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

/* <any> .systemvmcheck <bool> */
private int
zsystemvmcheck(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;

    make_bool(op, (r_space(op) == avm_system ? true : false));
    return 0;
}

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

const op_def 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},
    op_def_end(0)
};
