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nethack/sys/share/pcunix.c
nhmall 02a48aa8cf split g into multiple structures 
The consolidation of global variables from scattered source
files into decl.c and declared in decl.h was begun in 3.7.0.
Their placement in common files was done for centralized
initialization and potential re-initialization during a
"play again" scenario.

It wasn't really necessary for all of them to be housed in a
single huge structure to meet the "play again" requirement,
and the single huge structure has been a little unwieldy when
it comes to maintenance.

Following this commit, instead of one single extremely large structure
named 'g' to house all of the relocated global variables, they
are distributed into several ga through gz.

To make things easy for the developer, each variable is placed
into the struct corresponding to the starting letter of the variable.
That way, no lookup is required in order to know which struct houses
a particular variable, it is a simple match to the starting letter
for all the centralized global variables.

A global variable named 'amulets', would be found in ga.
    ga.amulets
     ^ ^
A global varable named 'move', would be found in gm.
    gm.moves
     ^ ^
A global variable named 'val_for_n_or_more' would be found in gv.
    gv.val_for_n_or_more
     ^ ^
A global variable named 'youmonst' would be found in gy.
    gy.youmonst
     ^ ^
2022-11-29 21:53:21 -05:00

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/* NetHack 3.7 pcunix.c $NHDT-Date: 1596498285 2020/08/03 23:44:45 $ $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.42 $ */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/*-Copyright (c) Michael Allison, 2006. */
/* NetHack may be freely redistributed. See license for details. */
/* This file collects some Unix dependencies; pager.c contains some more */
#include "hack.h"
#include "wintty.h"
#include <sys/stat.h>
#if defined(MSDOS)
#include <errno.h>
#endif
#if defined(MSDOS)
extern char orgdir[];
#endif
#if defined(TTY_GRAPHICS)
extern void backsp(void);
extern void clear_screen(void);
#endif
#if 0
static struct stat buf;
#endif
#ifdef WANT_GETHDATE
static struct stat hbuf;
#endif
#if defined(PC_LOCKING) && !defined(SELF_RECOVER)
static int eraseoldlocks(void);
#endif
#if 0
int
uptodate(int fd)
{
#ifdef WANT_GETHDATE
if(fstat(fd, &buf)) {
pline("Cannot get status of saved level? ");
return(0);
}
if(buf.st_mtime < hbuf.st_mtime) {
pline("Saved level is out of date. ");
return(0);
}
#else
#if (defined(MICRO)) && !defined(NO_FSTAT)
if(fstat(fd, &buf)) {
if(gm.moves > 1) pline("Cannot get status of saved level? ");
else pline("Cannot get status of saved game.");
return(0);
}
if(comp_times(buf.st_mtime)) {
if(gm.moves > 1) pline("Saved level is out of date.");
else pline("Saved game is out of date. ");
/* This problem occurs enough times we need to give the player
* some more information about what causes it, and how to fix.
*/
#ifdef MSDOS
pline("Make sure that your system's date and time are correct.");
pline("They must be more current than NetHack.EXE's date/time stamp.");
#endif /* MSDOS */
return(0);
}
#endif /* MICRO */
#endif /* WANT_GETHDATE */
return(1);
}
#endif
#if defined(PC_LOCKING)
#if !defined(SELF_RECOVER)
static int
eraseoldlocks(void)
{
register int i;
/* cannot use maxledgerno() here, because we need to find a lock name
* before starting everything (including the dungeon initialization
* that sets astral_level, needed for maxledgerno()) up
*/
for (i = 1; i <= MAXDUNGEON * MAXLEVEL + 1; i++) {
/* try to remove all */
set_levelfile_name(gl.lock, i);
(void) unlink(fqname(gl.lock, LEVELPREFIX, 0));
}
set_levelfile_name(gl.lock, 0);
#ifdef HOLD_LOCKFILE_OPEN
really_close();
#endif
if (unlink(fqname(gl.lock, LEVELPREFIX, 0)))
return 0; /* cannot remove it */
return (1); /* success! */
}
#endif /* SELF_RECOVER */
void
getlock(void)
{
register int fd, c, ci, ct;
int fcmask = FCMASK;
char tbuf[BUFSZ];
const char *fq_lock;
#if defined(MSDOS) && defined(NO_TERMS)
int grmode = iflags.grmode;
#endif
/* we ignore QUIT and INT at this point */
if (!lock_file(HLOCK, LOCKPREFIX, 10)) {
wait_synch();
#if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
chdirx(orgdir, 0);
#endif
error("Quitting.");
}
/* regularize(lock); */ /* already done in pcmain */
Sprintf(tbuf, "%s", fqname(gl.lock, LEVELPREFIX, 0));
set_levelfile_name(gl.lock, 0);
fq_lock = fqname(gl.lock, LEVELPREFIX, 1);
if ((fd = open(fq_lock, 0)) == -1) {
if (errno == ENOENT)
goto gotlock; /* no such file */
#if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
chdirx(orgdir, 0);
#endif
perror(fq_lock);
unlock_file(HLOCK);
error("Cannot open %s", fq_lock);
}
(void) nhclose(fd);
if (iflags.window_inited) {
#ifdef SELF_RECOVER
c = yn("There are files from a game in progress under your name. "
"Recover?");
#else
pline("There is already a game in progress under your name.");
pline("You may be able to use \"recover %s\" to get it back.\n",
tbuf);
c = yn("Do you want to destroy the old game?");
#endif
} else {
#if defined(MSDOS) && defined(NO_TERMS)
grmode = iflags.grmode;
if (grmode)
gr_finish();
#endif
c = 'n';
ct = 0;
#ifdef SELF_RECOVER
msmsg("There are files from a game in progress under your name. "
"Recover? [yn]");
#else
msmsg("\nThere is already a game in progress under your name.\n");
msmsg("If this is unexpected, you may be able to use \n");
msmsg("\"recover %s\" to get it back.", tbuf);
msmsg("\nDo you want to destroy the old game? [yn] ");
#endif
while ((ci = nhgetch()) != '\n') {
if (ct > 0) {
msmsg("\b \b");
ct = 0;
c = 'n';
}
if (ci == 'y' || ci == 'n' || ci == 'Y' || ci == 'N') {
ct = 1;
c = ci;
msmsg("%c", c);
}
}
}
if (c == 'y' || c == 'Y')
#ifndef SELF_RECOVER
if (eraseoldlocks()) {
goto gotlock;
} else {
unlock_file(HLOCK);
#if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
chdirx(orgdir, 0);
#endif
error("Couldn't destroy old game.");
}
#else /*SELF_RECOVER*/
if (recover_savefile()) {
#if defined(TTY_GRAPHICS)
if (WINDOWPORT(tty))
clear_screen(); /* display gets fouled up otherwise */
#endif
goto gotlock;
} else {
unlock_file(HLOCK);
#if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
chdirx(orgdir, 0);
#endif
error("Couldn't recover old game.");
}
#endif /*SELF_RECOVER*/
else {
unlock_file(HLOCK);
#if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
chdirx(orgdir, 0);
#endif
error("%s", "Cannot start a new game.");
}
gotlock:
fd = creat(fq_lock, fcmask);
unlock_file(HLOCK);
if (fd == -1) {
#if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
chdirx(orgdir, 0);
#endif
error("cannot creat file (%s.)", fq_lock);
} else {
if (write(fd, (char *) &gh.hackpid, sizeof(gh.hackpid))
!= sizeof(gh.hackpid)) {
#if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
chdirx(orgdir, 0);
#endif
error("cannot write lock (%s)", fq_lock);
}
if (nhclose(fd) == -1) {
#if defined(CHDIR) && !defined(NOCWD_ASSUMPTIONS)
chdirx(orgdir, 0);
#endif
error("cannot close lock (%s)", fq_lock);
}
}
#if defined(MSDOS) && defined(NO_TERMS)
if (grmode)
gr_init();
#endif
}
#endif /* PC_LOCKING */
void
regularize(register char *s)
/*
* normalize file name - we don't like .'s, /'s, spaces, and
* lots of other things
*/
{
register char *lp;
for (lp = s; *lp; lp++)
if (*lp <= ' ' || *lp == '"' || (*lp >= '*' && *lp <= ',')
|| *lp == '.' || *lp == '/' || (*lp >= ':' && *lp <= '?') ||
#ifdef OS2
*lp == '&' || *lp == '(' || *lp == ')' ||
#endif
*lp == '|' || *lp >= 127 || (*lp >= '[' && *lp <= ']'))
*lp = '_';
}
#ifdef __EMX__
void
seteuid(int i)
{
;
}
#endif
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