usr/src/usr.bin/pascal/libpc/PCSTART.c

/*-
 * Copyright (c) 1979 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)PCSTART.c   1.10 (Berkeley) 5/29/90";
#endif /* not lint */

#include <signal.h>
#include "h00vars.h"
#include "libpc.h"

/*
 * program variables
 */
struct display  _disply[MAXLVL];
int             _argc;
char            **_argv;
long            _stlim = 500000;
long            _stcnt = 0;
long            _seed = 1;
#ifdef ADDR32
char            *_minptr = (char *)0x7fffffff;
#endif ADDR32
#ifdef ADDR16
char            *_minptr = (char *)0xffff;
#endif ADDR16
char            *_maxptr = (char *)0;

/*
 * file record variables
 */
long            _filefre = PREDEF;
struct iorechd  _fchain = {
        0, 0, 0, 0,             /* only use fchain field */
        INPUT                   /* fchain  */
};
struct iorec    *_actfile[MAXFILES] = {
        INPUT,
        OUTPUT,
        ERR
};

/*
 * standard files
 */
char            _inwin, _outwin, _errwin;
struct iorechd  input = {
        &_inwin,                /* fileptr */
        0,                      /* lcount  */
        0x7fffffff,             /* llimit  */
        stdin,                  /* fbuf    */
        OUTPUT,                 /* fchain  */
        STDLVL,                 /* flev    */
        "standard input",       /* pfname  */
        FTEXT|FREAD|SYNC|EOLN,  /* funit   */
        0,                      /* fblk    */
        1                       /* fsize   */
};
struct iorechd  output = {
        &_outwin,               /* fileptr */
        0,                      /* lcount  */
        0x7fffffff,             /* llimit  */
        stdout,                 /* fbuf    */
        ERR,                    /* fchain  */
        STDLVL,                 /* flev    */
        "standard output",      /* pfname  */
        FTEXT | FWRITE | EOFF,  /* funit   */
        1,                      /* fblk    */
        1                       /* fsize   */
};
struct iorechd  _err = {
        &_errwin,               /* fileptr */
        0,                      /* lcount  */
        0x7fffffff,             /* llimit  */
        stderr,                 /* fbuf    */
        FILNIL,                 /* fchain  */
        STDLVL,                 /* flev    */
        "Message file",         /* pfname  */
        FTEXT | FWRITE | EOFF,  /* funit   */
        2,                      /* fblk    */
        1                       /* fsize   */
};

PCSTART(mode)
        int mode;
{
        /*
         * necessary only on systems which do not initialize
         * memory to zero
         */

        struct iorec    **ip;

        /*
         * if running with runtime tests enabled, give more
         * coherent error messages for FPEs
         */
        if (mode) {
                signal(SIGFPE, EXCEPT);
        }
        for (ip = &_actfile[3]; ip < &_actfile[MAXFILES]; *ip++ = FILNIL);
}