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(Partially) fixed the incorrect behavior of ox_plot when resetting.

/*
 * Copyright (c) 1994-2000 FUJITSU LABORATORIES LIMITED 
 * All rights reserved.
 * 
 * FUJITSU LABORATORIES LIMITED ("FLL") hereby grants you a limited,
 * non-exclusive and royalty-free license to use, copy, modify and
 * redistribute, solely for non-commercial and non-profit purposes, the
 * computer program, "Risa/Asir" ("SOFTWARE"), subject to the terms and
 * conditions of this Agreement. For the avoidance of doubt, you acquire
 * only a limited right to use the SOFTWARE hereunder, and FLL or any
 * third party developer retains all rights, including but not limited to
 * copyrights, in and to the SOFTWARE.
 * 
 * (1) FLL does not grant you a license in any way for commercial
 * purposes. You may use the SOFTWARE only for non-commercial and
 * non-profit purposes only, such as academic, research and internal
 * business use.
 * (2) The SOFTWARE is protected by the Copyright Law of Japan and
 * international copyright treaties. If you make copies of the SOFTWARE,
 * with or without modification, as permitted hereunder, you shall affix
 * to all such copies of the SOFTWARE the above copyright notice.
 * (3) An explicit reference to this SOFTWARE and its copyright owner
 * shall be made on your publication or presentation in any form of the
 * results obtained by use of the SOFTWARE.
 * (4) In the event that you modify the SOFTWARE, you shall notify FLL by
 * e-mail at risa-admin@sec.flab.fujitsu.co.jp of the detailed specification
 * for such modification or the source code of the modified part of the
 * SOFTWARE.
 * 
 * THE SOFTWARE IS PROVIDED AS IS WITHOUT ANY WARRANTY OF ANY KIND. FLL
 * MAKES ABSOLUTELY NO WARRANTIES, EXPRESSED, IMPLIED OR STATUTORY, AND
 * EXPRESSLY DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF THIRD PARTIES'
 * RIGHTS. NO FLL DEALER, AGENT, EMPLOYEES IS AUTHORIZED TO MAKE ANY
 * MODIFICATIONS, EXTENSIONS, OR ADDITIONS TO THIS WARRANTY.
 * UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, TORT, CONTRACT,
 * OR OTHERWISE, SHALL FLL BE LIABLE TO YOU OR ANY OTHER PERSON FOR ANY
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE OR CONSEQUENTIAL
 * DAMAGES OF ANY CHARACTER, INCLUDING, WITHOUT LIMITATION, DAMAGES
 * ARISING OUT OF OR RELATING TO THE SOFTWARE OR THIS AGREEMENT, DAMAGES
 * FOR LOSS OF GOODWILL, WORK STOPPAGE, OR LOSS OF DATA, OR FOR ANY
 * DAMAGES, EVEN IF FLL SHALL HAVE BEEN INFORMED OF THE POSSIBILITY OF
 * SUCH DAMAGES, OR FOR ANY CLAIM BY ANY OTHER PARTY. EVEN IF A PART
 * OF THE SOFTWARE HAS BEEN DEVELOPED BY A THIRD PARTY, THE THIRD PARTY
 * DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE,
 * PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE.
 *
 * $OpenXM: OpenXM_contrib2/asir2018/plot/ox_plot.c,v 1.3 2019/07/25 05:57:56 noro Exp $
*/
#include "ca.h"
#include "parse.h"
#include "ox.h"
#include "ifplot.h"
#include "version.h"
#include <signal.h>
#if defined(PARI)
#include "genpari.h"
#endif

extern int asir_OperandStackSize;
extern Obj *asir_OperandStack;
extern int asir_OperandStackPtr;

// environement is defined in libpari.a
#if !(PARI_VERSION_CODE > 131588)
extern jmp_buf environnement;
#endif

extern int do_message;
extern int ox_flushing;
extern JMP_BUF ox_env;
extern MATHCAP my_mathcap;
extern char LastError[];

void create_error(ERR *,unsigned int ,char *,LIST );
int objcp(NODE arg);

void ox_io_init();
void ox_asir_init(int,char **,char *);
Obj asir_pop_one();
void asir_push_one(Obj);
void asir_end_flush();
int asir_executeString();
void asir_evalName(unsigned int);
void asir_setName(unsigned int);
void asir_pops();
void asir_popString();
void asir_popCMO(unsigned int);
void asir_popSerializedLocalObject();
char *name_of_cmd(unsigned int);
char *name_of_id(int);
LIST asir_GetErrorList();

static void asir_do_cmd(unsigned int,unsigned int);
static void process_ox();
static void asir_executeFunction();

int Im_ox_plot;

#if defined(VISUAL) || defined(__MINGW32__)
void ox_plot_main()
#else
void ox_plot_main(int argc,char **argv)
#endif
{
  int ds;
  fd_set r;
  int n;
  int use_x;

#if !defined(VISUAL) && !defined(__MINGW32__)
  ox_asir_init(argc,argv,"ox_plot");
  use_x=init_plot_display(argc,argv);
  if(use_x) ds=ConnectionNumber(display);
  else fprintf(stderr,"Entering no X mode\n");
#endif
  if(do_message)fprintf(stderr,"I'm an ox_plot, Version %d.\n",ASIR_VERSION);
  Im_ox_plot = 1;
#if 0
  if(SETJMP(ox_env)){
    while(NEXT(asir_infile))closecurrentinput();
    reset_current_computation();
    ox_send_sync(0);
  }
#endif
  while (1){
#if defined(VISUAL) || defined(__MINGW32__)
    process_ox();
#else
    if(ox_data_is_available(0)) process_ox();
    else if(use_x){
      FD_ZERO(&r);
      FD_SET(3,&r); FD_SET(ds,&r);
      select(FD_SETSIZE,&r,NULL,NULL,NULL);
      if(FD_ISSET(3,&r)) process_ox();
      else if(FD_ISSET(ds,&r)) process_xevent();
    }
  }
#endif
}

static void process_ox(){
  int id;
  unsigned int cmd;
  Obj obj;
  ERR err;
  unsigned int serial;
  int ret;

  serial=ox_recv(0,&id,&obj);
  if(do_message) fprintf(stderr,"#%d Got %s",serial,name_of_id(id));
  switch (id){
    case OX_COMMAND:
      cmd=((USINT)obj)->body;
      if(ox_flushing) break;
      if(do_message) fprintf(stderr," %s\n",name_of_cmd(cmd));
      ret=SETJMP(main_env);
      if(ret){
        if(ret==1){
          create_error(&err,serial,LastError,0);
          asir_push_one((Obj)err);
        }
        break;
      }
      asir_do_cmd(cmd,serial);
      break;
    case OX_DATA:
    case OX_LOCAL_OBJECT_ASIR:
      if(ox_flushing)break;
      if(do_message)fprintf(stderr," -> data pushed");
      asir_push_one(obj);
      break;
    case OX_SYNC_BALL:
      asir_end_flush();
      break;
    default:
      break;
  }
  if(do_message)fprintf(stderr,"\n");
}

static void asir_do_cmd(unsigned int cmd,unsigned int serial){
  MATHCAP client_mathcap;
  LIST list;
  int i;
  Z q;

  switch (cmd){
    case SM_dupErrors:
      list=asir_GetErrorList();
      asir_push_one((Obj)list);
      break;
    case SM_getsp:
      i=asir_OperandStackPtr+1;
      STOZ(i,q);
      asir_push_one((Obj)q);
      break;
    case SM_popSerializedLocalObject:
      asir_popSerializedLocalObject();
      break;
    case SM_popCMO:
      asir_popCMO(serial);
      break;
    case SM_popString:
      asir_popString();
      break;
    case SM_setName:
      asir_setName(serial);
      break;
    case SM_evalName:
      asir_evalName(serial);
      break;
    case SM_executeStringByLocalParser:
      asir_executeString();
      break;
    case SM_executeFunction:
      asir_executeFunction(serial);
      break;
    case SM_shutdown:
      asir_terminate(2);
      break;
    case SM_pops:
      asir_pops();
      break;
    case SM_mathcap:
      asir_push_one((Obj)my_mathcap);
      break;
    case SM_setMathcap:
      client_mathcap=(MATHCAP)asir_pop_one();
      store_remote_mathcap(0,client_mathcap);
      break;
    case SM_nop:
    default:
      break;
  }
}

static void asir_executeFunction(int serial){
  char *fn;
  int argc,id,fno;
  FUNC f;
  Z ret;
  VL vl;
  ERR err;
  NODE n,n1; 
  LIST bytes;

  fn=((STRING)asir_pop_one())->body;
  argc=(int)(((USINT)asir_pop_one())->body);
  for(n=0;argc;argc--){
    NEXTNODE(n,n1);
    BDY(n1)=(pointer)asir_pop_one();
  }
  if(n)NEXT(n1)=0;
  id=-1;
  fno=modeNO(fn);
  switch (fno){
  case 0://IFPLOT
    id=plot(n,fno);
    STOZ(id,ret);
    asir_push_one((Obj)ret);
    break;
  case 1://CONPLOT
    id=plot(n,fno);
    STOZ(id,ret);
    asir_push_one((Obj)ret);
    break;
  case 2://PLOT
    id=plot(n,fno);
    STOZ(id,ret);
    asir_push_one((Obj)ret);
    break;
  case 4://POLARPLOT
    id=plot(n,fno);
    STOZ(id,ret);
    asir_push_one((Obj)ret);
    break;
  case 30://MEMORY_PLOT
    memory_plot(n,&bytes);
    asir_push_one((Obj)bytes);
    break;
  case 31://ARRAYPLOT
    id=arrayplot(n);
    STOZ(id,ret);
    asir_push_one((Obj)ret);
    break;
  case 32://OPEN_CANVAS
    id=open_canvas(n);
    STOZ(id,ret);
    asir_push_one((Obj)ret);
    break;
  case 5://PLOTOVER
    plotover(n);
    break;
  case 33://DRAWCIRCLE
    drawcircle(n);
    break;
  case 34://DRAW_OBJ
    if(draw_obj(n) < 0 ){
      create_error(&err,serial,LastError,0);
      asir_push_one((Obj)err);
    }  
    break;
  case 35://DRAW_STRING
    if(draw_string(n)<0){
      create_error(&err,serial,LastError,0);
      asir_push_one((Obj)err);
    }
    break;
  case 37://CLEAR_CANVAS
    clear_canvas(n);
    break;
// ifplotNG
  case 36://OBJ_CP
    id=objcp(n);
    STOZ(id,ret);
    asir_push_one((Obj)ret);
    break;
  case 6://IFPLOTD
  case 7://IFPLOTQ
  case 8://IFPLOTB
  case 9://INEQND
  case 10://INEQNQ
  case 11://INEQNB
  case 21://CONPLOTD
  case 22://CONPLOTQ
  case 23://CONPLOTB
#if defined(INTERVAL)
  case 24://ITVIFPLOT
#endif
    id=ifplotNG(n,fno);
    STOZ(id,ret);
    asir_push_one((Obj)ret);
    break;
  case 12://INEQNDAND
  case 13://INEQNQAND
  case 14://INEQNBAND
  case 15://INEQNDOR
  case 16://INEQNQOR
  case 17://INEQNBOR
  case 18://INEQNDXOR
  case 19://INEQNQXOR
  case 20://INEQNBXOR
  case 25://PLOTOVERD
  case 26://PLOTOVERQ
  case 27://PLOTOVERB
    id=ifplotOP(n,fno);
    STOZ(id,ret);
    asir_push_one((Obj)ret);
    break;
  case 38://POLARPLOTD
    id=polarplotNG(n);
    STOZ(id,ret);
    asir_push_one((Obj)ret);
    break;
  }
}