/*      $NetBSD: setup.c,v 1.23 2021/05/02 12:50:46 rillig Exp $        */

/*
 * setup.c - set up all files for Phantasia
 * n.b.: this is used at build-time - i.e. during build.sh.
 */
#ifdef __NetBSD__
#include <sys/cdefs.h>
#endif

#include <sys/stat.h>
#include <fcntl.h>
#include <setjmp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#ifndef __dead /* Not NetBSD */
#define __dead
#endif

#include "phantdefs.h"
#include "phantstruct.h"
#include "phantglobs.h"
#include "pathnames.h"

int main(int, char *[]);
void Error(const char *, const char *) __dead;
double drandom(void);

/**/
/************************************************************************
/
/ FUNCTION NAME: main()
/
/ FUNCTION: setup files for Phantasia 3.3.2
/
/ AUTHOR: E. A. Estes, 12/4/85
/
/ ARGUMENTS: none
/
/ RETURN VALUE: none
/
/ MODULES CALLED: time(), exit(), stat(), Error(), creat(), close(), fopen(),
/       fgets(), floor(), srandom(), umask(), drandom(), strcpy(), getuid(),
/       unlink(), fwrite(), fclose(), sscanf(), printf(), strlen(), fprintf()
/
/ GLOBAL INPUTS: Curmonster, _iob[], Databuf[], *Monstfp, Enrgyvoid
/
/ GLOBAL OUTPUTS: Curmonster, Databuf[], *Monstfp, Enrgyvoid
/
/ DESCRIPTION:
/
/       This program tries to verify the parameters specified in
/       the Makefile.
/
/       Create all necessary files.  Note that nothing needs to be
/       put in these files.
/       Also, the monster binary data base is created here.
/
/ ************************************************************************/

static const char *const files[] = {            /* all files to create */
        _PATH_MONST,
        _PATH_PEOPLE,
        _PATH_MESS,
        _PATH_LASTDEAD,
        _PATH_MOTD,
        _PATH_GOLD,
        _PATH_VOID,
        _PATH_SCORE,
        NULL,
};

const char *monsterfile = "monsters.asc";

int
main(int argc, char *argv[])
{
        const char *const *filename; /* for pointing to file names */
        int             fd;             /* file descriptor */
        FILE            *fp;                    /* for opening files */
        struct stat     fbuf;           /* for getting files statistics */
        int ch;
        char *path;

        while ((ch = getopt(argc, argv, "m:")) != -1)
                switch(ch) {
                case 'm':
                        monsterfile = optarg;
                        break;
                case '?':
                default:
                        break;
                }
        argc -= optind;
        argv += optind;

    srandom((unsigned) time(NULL));     /* prime random numbers */

    umask(0117);                /* only owner can read/write created files */

    /* try to create data files */
    filename = &files[0];
    while (*filename != NULL)
        /* create each file */
        {
        path = strrchr(*filename, '/') + 1;
        if (stat(path, &fbuf) == 0)
            /* file exists; remove it */
            {
            if (unlink(path) < 0)
                Error("Cannot unlink %s.\n", path);
                /*NOTREACHED*/
            }

        if ((fd = creat(path, 0660)) < 0)
            Error("Cannot create %s.\n", path);
            /*NOTREACHED*/

        close(fd);                      /* close newly created file */

        ++filename;                     /* process next file */
        }

    /* Initialize an empty file placeholder for the grail location. */
    if ((fp = fopen(path, "w")) == NULL)
        Error("Cannot create %s.\n", path);
    fclose(fp);

    /* create binary monster data base */
    path = strrchr(_PATH_MONST, '/') + 1;
    if ((Monstfp = fopen(path, "w")) == NULL)
        Error("Cannot update %s.\n", path);
    else
        {
        if ((fp = fopen(monsterfile, "r")) == NULL)
            {
            fclose(Monstfp);
            Error("cannot open %s to create monster database.\n", "monsters.asc");
            }
        else
            {
            Curmonster.m_o_strength =
            Curmonster.m_o_speed =
            Curmonster.m_maxspeed =
            Curmonster.m_o_energy =
            Curmonster.m_melee =
            Curmonster.m_skirmish = 0.0;

            while (fgets(Databuf, SZ_DATABUF, fp) != NULL)
                /* read in text file, convert to binary */
                {
                sscanf(&Databuf[24], "%lf%lf%lf%lf%lf%d%d%lf",
                    &Curmonster.m_strength, &Curmonster.m_brains,
                    &Curmonster.m_speed, &Curmonster.m_energy,
                    &Curmonster.m_experience, &Curmonster.m_treasuretype,
                    &Curmonster.m_type, &Curmonster.m_flock);
                Databuf[24] = '\0';
                strcpy(Curmonster.m_name, Databuf);
                fwrite((char *) &Curmonster, SZ_MONSTERSTRUCT, 1, Monstfp);
                }
            fclose(fp);
            fflush(Monstfp);
            if (ferror(Monstfp))
                Error("Writing %s.\n", path);
            fclose(Monstfp);
            }
        }

#ifdef MAKE_INSTALLS_THIS_AND_DOESNT_WANT_TO_HEAR_ABOUT_IT
    /* write to motd file */
    printf("One line 'motd' ? ");
    if (fgets(Databuf, SZ_DATABUF, stdin) == NULL)
        Databuf[0] = '\0';
    path = strrchr(_PATH_MOTD, '/') + 1;
    if ((fp = fopen(path, "w")) == NULL)
        Error("Cannot update %s.\n", path);
    else
        {
        fwrite(Databuf, sizeof(char), strlen(Databuf), fp);
        fclose(fp);
        }

    /* report compile-time options */
    printf("Compiled options:\n\n");
    printf("Phantasia destination directory:  %s\n", _PATH_PHANTDIR);
    printf("Wizard: root UID: 0\n");

#ifdef BSD41
    printf("Compiled for BSD 4.1\n");
#endif

#ifdef BSD42
    printf("Compiled for BSD 4.2\n");
#endif

#ifdef SYS3
    printf("Compiled for System III\n");
#endif

#ifdef SYS5
    printf("Compiled for System V\n");
#endif
#endif

    exit(0);
    /*NOTREACHED*/
}
/**/
/************************************************************************
/
/ FUNCTION NAME: Error()
/
/ FUNCTION: print an error message, and exit
/
/ AUTHOR: E. A. Estes, 12/4/85
/
/ ARGUMENTS:
/       char *str - format string for printf()
/       char *file - file which caused error
/
/ RETURN VALUE: none
/
/ MODULES CALLED: exit(), perror(), fprintf()
/
/ GLOBAL INPUTS: _iob[]
/
/ GLOBAL OUTPUTS: none
/
/ DESCRIPTION:
/       Print an error message, then exit.
/
/ ************************************************************************/

void
Error(const char *str, const char *file)
{
    fprintf(stderr, "Error: ");
    fprintf(stderr, str, file);
    perror(file);
    exit(1);
    /*NOTREACHED*/
}
/**/
/************************************************************************
/
/ FUNCTION NAME: drandom()
/
/ FUNCTION: return a random number
/
/ AUTHOR: E. A. Estes, 2/7/86
/
/ ARGUMENTS: none
/
/ RETURN VALUE: none
/
/ MODULES CALLED: random()
/
/ GLOBAL INPUTS: none
/
/ GLOBAL OUTPUTS: none
/
/ DESCRIPTION:
/
/ ************************************************************************/

double
drandom(void)
{
    if (sizeof(int) != 2)
        return((double) (random() & 0x7fff) / 32768.0);
    else
        return((double) random() / 32768.0);
}