usr/src/usr.lib/libpc/PCSTART.c

/* Copyright (c) 1979 Regents of the University of California */

static char sccsid[] = "@(#)PCSTART.c 1.8 1/10/83";

#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  */
        &_iob[0],               /* 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  */
        &_iob[1],               /* 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  */
        &_iob[2],               /* 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);
}