/* Copyright (C) 2001-2006 Artifex Software, Inc.
   All Rights Reserved.
  
   This software is provided AS-IS with no warranty, either express or
   implied.

   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.,  7 Mt. Lassen Drive - Suite A-134,
   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
*/

/* $Id: zsysvm.c 8250 2007-09-25 13:31:24Z giles $ */
/* 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. */
static 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> */
static int
zglobalvmarray(i_ctx_t *i_ctx_p)
{
    return specific_vm_op(i_ctx_p, zarray, avm_global);
}

/* <int> .globalvmdict <dict> */
static 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> */
static int
zglobalvmpackedarray(i_ctx_t *i_ctx_p)
{
    return specific_vm_op(i_ctx_p, zpackedarray, avm_global);
}

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

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

/* <int> .localvmdict <dict> */
static 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> */
static int
zlocalvmpackedarray(i_ctx_t *i_ctx_p)
{
    return specific_vm_op(i_ctx_p, zpackedarray, avm_local);
}

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

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

/* <int> .systemvmdict <dict> */
static 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> */
static int
zsystemvmpackedarray(i_ctx_t *i_ctx_p)
{
    return specific_vm_op(i_ctx_p, zpackedarray, avm_system);
}

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

/* <name_string> <access_string> .systemvmfile <file> */
static int
zsystemvmfile(i_ctx_t *i_ctx_p)
{
    return specific_vm_op(i_ctx_p, zfile, avm_system);
}

/* <string> .systemvmlibfile <file> true */
/* <string> .systemvmlibfile <string> false */
static int
zsystemvmlibfile(i_ctx_t *i_ctx_p)
{
    return specific_vm_op(i_ctx_p, zlibfile, avm_system);
}

/* <source> <EODcount> <EODstring> .systemvmSFD <file> */
/* <source> <dict> <EODcount> <EODstring> .systemvmSFD <file> */
/* <source> <dict> .systemvmSFD <file> *//* (LL3 only) */
static int
zsystemvmSFD(i_ctx_t *i_ctx_p)
{
    return specific_vm_op(i_ctx_p, zSFD, avm_system);
}

/* <any> .systemvmcheck <bool> */
static 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},
    {"1.systemvmfile", zsystemvmfile},
    {"1.systemvmlibfile", zsystemvmlibfile},
    {"2.systemvmSFD", zsystemvmSFD},
    op_def_end(0)
};
