gmcatari.c

/*
 * $Header: f:/src/gulam\RCS\gmcatari.c,v 1.1 1991/09/10 01:02:04 apratt Exp $ $Locker:  $
 * ======================================================================
 * $Log: gmcatari.c,v $
 * Revision 1.1  1991/09/10  01:02:04  apratt
 * First CI of AKP
 *
 * Revision: 1.12 90.01.15.18.15.22 apratt 
 * Changed df's output from free/total to free/used/total.
 * 
 * Revision: 1.11 89.06.16.17.23.48 apratt 
 * Header style change.
 * 
 * Revision: 1.10 89.03.30.17.56.42 Author: apratt
 * Added setting a NEW dta to the save/restore DTA bit.
 * 
 * Revision: 1.9 89.03.30.17.50.20 Author: apratt
 * Added saving of caller's DTA and restoring to shell_p handler.
 * 
 * Revision: 1.8 89.03.28.13.02.32 Author: apratt
 * Added code to set masterdate when we make the Tgettime/Tgetdate call.
 * Doesn't add execution time, but keeps us up to date often enough.
 * 
 * Revision: 1.7 89.02.14.14.57.20 Author: apratt
 * Changed tooold to use masterdate rather than stamptime(), which
 * makes two OS calls.  This means the question of "too old" means
 * "over a year old when you STARTED GULAM" not a year old from NOW.
 * 
 * Revision: 1.6 89.02.07.14.05.00 Author: apratt
 * mem did not work, does now
 * 
 * Revision: 1.5 89.02.07.13.31.40 Author: apratt
 * Reinstated mem, but made it more innocuous
 * 
 * Revision: 1.4 89.02.07.12.29.10 Author: apratt
 * Changed cmdfirst to cmdprobe ... see main.c for more.
 * 
 * Revision: 1.3 89.02.01.18.31.14 Author: apratt
 * Added yearstr and tooold, used by ls -l to show year rather
 * than time when a file is tooold() (twelve months).
 * 
 * Revision: 1.2 89.02.01.17.58.40 Author: apratt
 * Fixed lack of unredirection when _shell_p is used.  Problem was
 * that doredirections clobbered the (static) fda[] array without
 * noticing that it should be nesting redirections.  callgulam()
 * now saves & restores fda[].
 * 
 * Callgulam also now performs keyreset() after processcmd() because
 * otherwise calling ue or te from shell_p causes kb to be gu-ized.
 * 
 * Revision: 1.1 89.01.11.14.37.50 Author: apratt
 * Initial Revision
 * 
 */

/*
	machine.c of Gulam/uE -- machine/system specific rtns and vars

*/

/* 890111 kbad	Changed OS name to TOS (AtariST/TOS is silly)
*/

#include "ue.h"

#ifndef SuperToUser
#define SuperToUser(sp) Super((void *)(sp))
#endif



/* The following have AtariSt specific special chars embedded in the
strings.  These special chars are visually more appealing; they have
no other functional requirements.  */

uchar OS[] = "TOS";
uchar GulamLogo[] = "\257gul\204m\256";
uchar Copyright[] = "\275";
uchar defaultprompt[] = "\257\257 ";	/* two > > chars */
uchar Mini[] = "\257mini\256";
uchar Completions[] = "\257completions\256";
uchar uE[] = "\346\356";				/* mu-epsilon */
uchar Bufferlist[] = "\257buffers\256";
uchar Tempexit[] = "temporarily exiting to \257gul\204m\256; buffers are NOT freed...\r\n";

uchar DS0[] = "\\";						/* file path name related strings */
uchar DS1[] = "\\.";
uchar DS2[] = "\\\\";
uchar DS3[] = "\\~";
uchar DS4[] = ":\\";
uchar DS5[] = "\\..\\";

uchar ext[SZext] = "g\0\0\0tos\0ttp\0prg\0";

#ifdef __GNUC__
long _stksize = 8 * 1024L;				/* controls stack size  */
#endif
long starttick;


/* Read the value of the systems 200-Hz counter (located at 0x4baL).
Must be called in Super Mode.  */

static long readtime(void)
{
	return *((long *) 0x000004baL);
}

/* Get the present time (in ticks) to the highest degree of accuracy
possible.  */

unsigned long getticks(void)
{
	return Supexec(readtime);
}

/* the last two decimal digits of A */
/* are stuffed into p[0], p[1]      */
static void twodigits(int a, uchar *p)
{
	*p++ = (a % 100) / 10 + '0';
	*p = a % 10 + '0';
}

/* Make a string (hr:mi:se) from the first three args, and store the
string in area p[0..7].  */

static void maketimestr(int hr, int min, int sec, uchar *p)
{
	twodigits(hr, p);
	twodigits(min, p + 3);
	twodigits(sec, p + 6);
	p[2] = p[5] = ':';
}

/* Compute the time spent by the just executed cmd.  AtariST ticks at
200Hz.  */

void computetime(void)
{
	int hr, mn, sc;
	long totalticks;
	uchar tm[10];

	if (starttick == 0)
		return;
	totalticks = getticks() - starttick;
	starttick = 0;
	if (totalticks < 0)
	{
		totalticks += 0x7fffffffL;
		totalticks++;
	}
	sc = (int) ((totalticks + 100L) / 200L);
	mn = sc / 60;
	sc -= mn * 60;
	hr = mn / 60;
	mn -= hr * 60;
	maketimestr(hr, mn, sc, tm);
	tm[8] = '\0';						/* see ls.c */
	outstr(sprintp("time spent by cmd = %s (%D 5ms-ticks)", tm, totalticks));
}

/* Stamp current date-time into the [] pted by ip. */
/* AKP: also set master date & time, since we're bothering anyway... */

void stamptime(unsigned long *ip)
{
	*ip = Tgetdate();
	*ip <<= 16;
	*ip |= Tgettime();
	masterdate = *ip;
}

/* Make a date string from d, and stuff it in p[0..6]; no \0 in
p[0..7].  */

void datestr(int d, uchar *p)
{
	static uchar *mons[] = {
		"???",
		"Jan", "Feb", "Mar", "Apr", "May", "Jun",
		"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
		"???", "???", "???"
	};
	int day, mon;

	day = (d & 0x001F);
	mon = (d >> 5) & 0x000F;
/*	yr  = ((d >> 9) & 0x01FF) + 1980;	*/
	strcpy(p, mons[mon]);
	twodigits(day, p + 4);
	p[3] = p[6] = ' ';
	if (p[4] == '0')
		p[4] = ' ';
}

/* tooold and yearstr added by AKP so ls -l shows year, not time */
/* for very old files (>= 1 year old) */

int tooold(unsigned int date)
{
	return ((masterdate >> 16) - date) >= 0x0180;	/* 0x180 is 12 months */
}

void yearstr(unsigned int date, char *s)
{
	*s++ = ' ';
	date = ((date >> 9) + 1980);
	twodigits(date / 100, s);
	twodigits(date % 100, s + 2);
}

/* Make a time string from d, and stuff it in p[0..7]; no \0 in
p[0..8].  */

void timestr(int t, uchar *p)
{
	int min, hr, sec;

	min = (t >> 5) & 0x003F;
	hr = (t >> 11) & 0x001F;
	sec = (t & 0x001F) << 1;
	maketimestr(hr, min, sec, p);
}

static uchar *new;						/* ptr to new time date string  */
static unsigned long td;				/* time and date in internal TOS form       */

/* Assign bit field <i:j> of td with a computed value from new[p],
new[p+1] which should be decimal digits, where j == i - 1 + #1's in
mask m */

static void sbf(int p, long m, int i)
{
	int a, b;
	long ll;

	a = new[p++];
	b = new[p];
	if ((a == 0) || (b == 0) || (a > '9') || (a < '0') || (b > '9') || (b < '0'))
		return;

	ll = (long) ((a - '0') * 10 + b - '0');
	if (i == 0)
		ll >>= 1;						/* couple of kludges! for 2*sec and yr */
	else if (i == 25)
		ll -= 80;
	ll = (ll << i) & m;
	td = (td & ~m) | ll;
}


/* Get/Set date and time; Get returns the date-stime string in strg,
which should be free()d when done.  Exported.  */

void gsdatetime(uchar *s)
{
	unsigned long *ip;
	uchar *q;

	stamptime(ip = &td);
	if (*s)
	{
		new = q = gmalloc(((uint) (strlen(s) + 20)));
		if (new == NULL)
			return;
		while ((*q++ = *s++) != 0)
			;
		for (q--; q < new + 20;)
			*q++ = ' ';
		sbf(0, (long) (0x0000000FL << 21), 21);	/* month */
		sbf(3, (long) (0x0000001FL << 16), 16);	/* day */
		sbf(6, (long) (0x0000003FL << 25), 25);	/* yr, 20th century */
		sbf(9, (long) (0x0000001FL << 11), 11);	/* hr */
		sbf(12, (long) (0x0000003FL << 5), 5);	/* min */
		sbf(15, (long) (0x0000001FL), 0);	/* sec */

		Settime(td);					/* set ikbd clock */
		Tsettime((unsigned int)*ip);
		Tsetdate((unsigned int)(*ip >> 16));
		gfree(new);
	} else
	{
		strg = q = gmalloc(16);
		datestr((unsigned int)(*ip >> 16), q);
		timestr((unsigned int)*ip, q + 7);
		q[15] = '\0';
	}
}

/* 'gem' is a prefix to cmds in Gulam on AtariST.  This rtn gets
called from docmd(); see do.c */

void Gem(uchar *arg)
{
	WS *ws;

	UNUSED(arg);
	gputs(Scrninit);
	drawshadedrect();
	mouseon(NULL);
	ws = useuplexws();
	shiftws(ws, 1);
	gfree(execcmd(ws));
	mouseoff(NULL);
	gputs(Scrninit);
	refresh(FALSE, 1);							/* redisplay windows */
}

/* Caller wants to get one line of input from user through the builtin
ue of Gulam.  Dont do a cr-lf after the line.  If caller so choses, he
can.  Called only via (*_shell_p)(p); the p better be a ptr to a
SZcmd-long byte area. */

static void cdecl getlineviaue(uchar *p)
{
	uchar *q;

	keysetup();
	if ((q = getoneline()) != NULL)
		strcpy(p, q);
	else
		*p = '\0';
	keyreset(FALSE, 1);
}

/* Called only via (*_shell_p)(p); returns the status of the cmd */

static long cdecl callgulam(uchar *p)
{
	int e;
	int sfda[4];
	DTA newdta;
	DTA *olddta;							/* AKP */

	/* added saving of caller's DTA (AKP) */
	olddta = (DTA *) Fgetdta();
	Fsetdta(&newdta);
	/* added saving of fda's so redirection is undone properly (AKP) */
	for (e = 0; e < 4; e++)
		sfda[e] = fda[e];
	e = exitue;
	exitue = 2;
	insertvar(Status, "0");
	cmdprobe = 0;						/* AKP */
	processcmd(gstrdup(p), 0);
	exitue = e;
	/* added keyreset because otherwise it's not done (AKP) */
	keyreset(FALSE, 1);
	for (e = 0; e < 4; e++)
		fda[e] = sfda[e];
	Fsetdta(olddta);
	return varnum(Status);
}


static unsigned short call_gulam_code[] = {
	0x8642, 0x0135, /* our magic number */
	0x4ef9, 0, 0,   /* jmp to getlineviaue */
	0x4ef9, 0, 0    /* jmp to callgulam */
};

void setgulam(void)
{
	long n;
	long *pp;
	
	n = Super(0L);						/* _shell_p = 0x4f6L */
	*((long *) (0x00004f6L)) = (long) &call_gulam_code[5];
	pp = (long *)&call_gulam_code[3];
	*pp = (long)getlineviaue;
	pp = (long *)&call_gulam_code[6];
	*pp = (long)callgulam;
	SuperToUser(n);
}


#ifdef NEVER
static void showmemlst(MD *p, WS *ws)
{
	long total, n;
	MD md;

	for (total = 0; p; p = md.m_link)
	{
		n = Super(0L);
		md = *p;
		SuperToUser(n);
		n = md.m_length;
		total += n;
		strwcat(ws, sprintp("%D \tbytes at %D  \towned by %D\r\n", n, md.m_start, md.m_own), 0);
	}
}
#endif


void mem(uchar *arg)
{
#ifdef NEVER
	WS *ws;
	uchar *p;

	/* pointer to GEMDOS memory parameter block */
	MPB *gdosmpb;

	UNUSED(arg);
	/* magic location addresses below! */
	gdosmpb = (*((long *) 0xfc0018L) == 0x04221987L ?	/* ROM date */
			   (MPB *) 0x00007e8eL :	/* Bammi & I labored for this! */
			   (MPB *) 0x000056ecL);	/* thanks to Konrad Hahn */
	ws = initws();
	p = lexgetword();
	if (*p)
	{
		if (*p != 'i')
		{
			strwcat(ws, "Malloc lst: \r\n", 0);
			showmemlst(gdosmpb->mp_mal, ws);
		} else
			showgumem();
	}
	strwcat(ws, "free   lst: \r\n", 0);
	showmemlst(gdosmpb->mp_mfl, ws);
	if (ws)
	{
		strg = ws->ps;
		gfree(ws);
	}
#else
	WS *ws = initws();
	long size;
	void **buf;
	void *first = 0;
	void **last = 0;

	UNUSED(arg);
	while ((size = (long)Malloc(-1L)) >= 8)
	{
		buf = (void **) Malloc(size);
		strwcat(ws, sprintp("%D\tbytes free at %D\r\n", size, buf), 0);
		if (last)
			*last = buf;
		else
			first = buf;
		last = buf;
		*buf = 0;
	}
	/* free all those buffers */
	buf = first;
	while (buf)
	{
		last = *buf;
		Mfree(buf);
		buf = last;
	}
	if (ws)
	{
		strg = ws->ps;
		gfree(ws);
	}
#endif
}

/* Try allocating a buffer as large as the requested size in nb.
Return the actual allocated size in nb.  At any time, only at most
one such block of mem is in use.  Must never fail, so we may
return the ptr to a static area.  Therefore, it must be freed by
maxfree().  TOS Malloc() gets unreliable if we call it too many (how many?)
times; so avoid using it unless necessary. */

static int maxastate;
static uchar rainyday[512];
static uchar *maxap;

uchar *maxalloc(long *nb)
{
	uchar *q;
	unsigned int sz;
	long lsz;

#define	bsz0	19*1024
#define	bszD	1024

	q = NULL;
	if (maxastate != 0)
		goto ret;

	if (*nb > 0x0000FFFEL)
	{
		if ((lsz = (long)Malloc(-1L)) != 0 && (q = (uchar *) Malloc(lsz)) != NULL)
		{
			*nb = lsz;
			maxastate = 1;
			goto ret;
		}
		*nb = 0;
	}
	/* will go thru loop at least once; so q will be def */
	for (sz = (*nb == 0 ? bsz0 : (unsigned int)*nb); sz >= bszD; sz -= bszD)
		if ((q = gmalloc(sz)) != NULL)
			break;
	if (q)
	{
		*nb = sz;
		maxastate = 2;
	} else
	{
		*nb = 512;
		maxastate = 3;
		q = rainyday;
	}

  ret:
	maxap = q;
	return q;
}

void maxfree(uchar *p)
{
	if (p == maxap)						/* else stray ptr */
	{
		if (maxastate == 2)
			gfree(p);
		else if (maxastate == 1)
			Mfree(p);
	}
	maxastate = 0;
}


static short peekw(short *a)
{
	long ssp = Super(0L);
	short ret = *a;

	SuperToUser(ssp);
	return ret;
}

static void pokew(short *a, short v)
{
	long ssp = Super(0L);

	*a = v;
	SuperToUser(ssp);
}


void lpeekw(uchar *arg)
{
	short *a, v;
	uchar *p;

	UNUSED(arg);
	p = lexgetword();
	if (*p == '\0')
		return;
	a = (short *) (atoir(p, 16) & 0xFFFFFFFEL);
	v = peekw(a);						/* peekw() is in MWC lib */
	strg = gstrdup(sprintp("word 0x%X has 0x%x", a, v));
}


void lpokew(uchar *arg)
{
	short *a, v;
	uchar *p;
	uchar *q;

	UNUSED(arg);
	p = lexgetword();
	q = lexgetword();
	if (*p && *q)
	{
		a = (short *) (atoir(p, 16) & 0xFFFFFFFEL);
		v = (short) atoir(q, 16);
		pokew(a, v);					/* pokew() is in MWC lib */
	}
}

/* cmd stx: format -1/2 [a] [b].  Formats with 11-sector interleaving, but
with 9 sectors/track. */

void format(uchar *p)
{
	short nb;
	short t;
	short drive;
	short ns;
	short sides;
	short disktype;
	short *ip;
	short *bf;
	uchar c;

	drive = 0;
	sides = 1 + negopts['2'];
	valu = 1;
	if ((c = *p) != 0)
	{
		if (c != 'a' && c != 'b')
			return;
		drive = c - 'a';
	}
	disktype = 1 + sides;
	bf = (short *) gmalloc(9 * 512 * 2);
	if (bf == NULL)
	{
		valu = -39;
		return;
	}
	for (nb = t = 0; t < 80; t++)
		for (ns = sides; ns-- > 0;)
		{
			userfeedback(sprintp("\033f\rtrack %d, side %d, bad sectors %d, status %D\033K:", t, ns, nb, valu), 1);
			valu = Flopfmt(bf, 0L, drive, 9, t, ns, 11, 0x87654321L, 0xE5E5);
			for (ip = bf; *ip++;)
				nb++;
			if (useraborted())
			{
				valu = -1;
				goto freebf;
			}
		}
	for (t = 9 * 512; t--;)
		bf[t] = 0;
	for (t = 0; t < 2; t++)
		valu = Flopwr(bf, 0L, drive, 1, t, 0, 9);
	Protobt(bf, (long) Random(), disktype, 0);
	valu += Flopwr(bf, 0L, drive, 1, 0, 0, 1);
	valu += Flopver(bf, 0L, drive, 1, 0, 0, 1);
  freebf:gfree(bf);
	if (valu == 0L)
		valu = -nb;
}


uchar *drvmap(char *dmap)
{
	long n;
	uchar *p;
	uchar c;

	n = Drvmap();
	p = dmap;
	for (c = 'A'; c <= 'Z'; c++)
	{
		if (n & 1L)
			*p++ = c;
		n >>= 1;
	}
	for (c = '1'; c <= '6'; c++)
	{
		if (n & 1L)
			*p++ = c;
		n >>= 1;
	}
	*p = '\0';
	return dmap;
}


void df(uchar *p)
{
	int c;
	DISKINFO v;
	unsigned long nb;
	unsigned long total;
	uchar s[2];

	c = *p;
	if ('A' <= c && c <= 'Z')
		c -= 'A' - 1;
	else if ('a' <= c && c <= 'z')
		c -= 'a' - 1;
	else if ('1' <= c && c <= '6')
		c -= '1' - 26 - 1;
	else
		c = 1 + (int) Dgetdrv();

	if (Dfree(&v, c) >= 0)
	{
		if (c > 26)
			s[0] = c - 26 + '1' - 1;
		else
			s[0] = c + 'A' - 1;
		s[1] = '\0';
		nb = v.b_secsiz * v.b_clsiz;				/* bytes/cluster    */
		total = v.b_total * nb;
		nb *= v.b_free;
		outstr(sprintp("%s: free %D, used %D, total %D", s, nb, total - nb, total));
	}
}

void dm(uchar *arg)
{
	char buf[34];
	
	UNUSED(arg);
	strg = str3cat("drive map: ", drvmap(buf), ES);
}