/* $Id: miscn.c,v 1.3 1999/05/31 23:35:39 sybalsky Exp $ (C) Copyright Venue, All Rights Reserved */

/************************************************************************/
/*									*/
/*	(C) Copyright 1989-95 Venue. All Rights Reserved.		*/
/*	Manufactured in the United States of America.			*/
/*									*/
/************************************************************************/

#include "version.h"

/***********************************************************/
/*
                File Name:	miscn.c
                Including:	OP_miscn
*/
/***********************************************************/

#include "arith.h"         // for N_GETNUMBER
#include "commondefs.h"    // for error
#include "emlglob.h"
#include "lispemul.h"      // for LispPTR, state, CurrentStackPTR, TopOfStack
#include "loopsopsdefs.h"  // for LCFetchMethod, LCFetchMethodOrHelp, LCFind...
#include "lspglob.h"
#include "lsptypes.h"
#include "miscndefs.h"     // for OP_miscn
#include "mvsdefs.h"       // for values, values_list
#include "subrs.h"         // for miscn_LCFetchMethod, miscn_LCFetchMethodOr...
#include "sxhashdefs.h"    // for STRING_EQUAL_HASHBITS, STRING_HASHBITS
#include "usrsubrdefs.h"   // for UserSubr

/***********************************************************/
/*
        Func Name  :	OP_miscn

        Interface:	Global Machine State
        Returns:	(must UFN)
                        0 = continue, C code succeeded.
                        1 = must UFN, C code failed.
*/
/***********************************************************/

int OP_miscn(int misc_index, int arg_count) {
  LispPTR *stk;
  int result;
  static LispPTR args[255];

  /* Put the Args into a Vector */

  args[0] = NIL_PTR;
  stk = ((LispPTR *)(void *)CurrentStackPTR) + 1;

  {
    int arg_num = arg_count;
    if (arg_num > 0) {
      *stk++ = (LispPTR)TopOfStack;
      while (arg_num > 0) args[--arg_num] = *--stk;
    }
  }

  /* Select the Misc Number */

  switch (misc_index) {
    case miscn_USER_SUBR: {
      int user_subr;
      N_GETNUMBER(args[0], user_subr, do_ufn);
      if ((result = UserSubr(user_subr, arg_count - 1, &args[1])) < 0) goto do_ufn;
    } break;
    case miscn_SXHASH: result = SX_hash(args[0]); break;

    case miscn_STRING_EQUAL_HASHBITS: result = STRING_EQUAL_HASHBITS(args[0]); break;

    case miscn_STRINGHASHBITS: result = STRING_HASHBITS(args[0]); break;

    case miscn_VALUES:
      if (arg_count > 255) {
        error("miscn: arg_count too big! continue punts");
        goto do_ufn;
      }
      result = values(arg_count, args);
      break;

    case miscn_VALUES_LIST:
      /*** debugging: should be impossible, but ADB found this once -FS *****/
      if (arg_count > 255) {
        error("miscn: arg_count too big! continue punts");
        goto do_ufn;
      }
      result = values_list(arg_count, args);
      break;

    case miscn_LCFetchMethod:
      result = LCFetchMethod(args[0], args[1]);
      if (result < 0) goto lc_ufn;
      break;

    case miscn_LCFetchMethodOrHelp:
      result = LCFetchMethodOrHelp(args[0], args[1]);
      if (result < 0) goto lc_ufn;
      break;

    case miscn_LCFindVarIndex:
      result = LCFindVarIndex(args[0], args[1]);
      if (result < 0) goto lc_ufn;
      break;

    case miscn_LCGetIVValue:
      result = LCGetIVValue(args[0], args[1]);
      if (result < 0) goto lc_ufn;
      break;

    case miscn_LCPutIVValue:
      result = LCPutIVValue(args[0], args[1], args[2]);
      if (result < 0) goto lc_ufn;
      break;
#ifdef RS232
    case miscn_RAW_RS232C_OPEN:
      if ((result = raw_rs232c_open(args[0])) == NIL) goto do_ufn;

      break;

    case miscn_RAW_RS232C_CLOSE:
      if ((result = raw_rs232c_close(args[0])) == NIL) goto do_ufn;

      break;

    case miscn_RAW_RS232C_SETPARAM:
      if ((result = raw_rs232c_setparams(args[0], args[1])) == NIL) goto do_ufn;
      break;
    case miscn_RAW_RS232C_GETPARAM:
      /******/ break;
    case miscn_RAW_RS232C_READ:
      if ((result = raw_rs232c_read(args[0], args[1], args[2])) == NIL) goto do_ufn;
      break;
    case miscn_RAW_RS232C_WRITE:
      if ((result = raw_rs232c_write(args[0], args[1], args[2])) == NIL) goto do_ufn;
      break;
    case miscn_RAW_RS232C_SETINT:
      if ((result = raw_rs232c_setint(args[0], args[1])) == NIL) goto do_ufn;
      break;
    case miscn_CHATTER: result = chatter(args); break;
#endif /* RS232 */

#ifdef JLISP
    case miscn_EJLISP:
#ifndef NOWNN
      result = ejlisp(args);
#endif
      break;
#endif /* JLISP */

    case /* miscn_CALL_C*/ 014:
      /* result = call_c_fn(args); */
      result = 0;
    break;

    default: goto do_ufn;

  } /* switch end */

  /* Setup Global Machine State for a Normal Return */

  PC += 3;
  CurrentStackPTR = (DLword *)(stk - 1);
  TopOfStack = (LispPTR)result;
  return (0);

/* A UFN request, so return 1 & don't change the Machine State */

do_ufn:
  return (1);
lc_ufn:
  if (result == -2) {
    return (0); /* have built new stack frame */
  } else {
    goto do_ufn;
  }

} /* OP_miscn */