games-request@tekred.TEK.COM (05/06/87)
Submitted by: Bill Randle <games-request@tekred.TEK.COM>
Mod.sources.games: Volume 1, Issue 8
Archive-name: rot22
[This is the latest and last version of the rot program. It
should be pretty well bullet-proof and even includes a man
page. This completely supersedes the previous version of
rot (2.0, patchlevel 0) that was posted in v01i005. Many
thanks to all the people that sent bug reports/fixes. -br]
#! /bin/sh
# This is a shell archive. Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file". To overwrite existing
# files, type "sh file -c". You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g.. If this archive is complete, you
# will see the following message at the end:
# "End of archive 1 (of 1)."
# Contents: README MANIFEST Makefile patchlvl.h rot.1 rot.c
# Wrapped by billr@tekred on Tue May 5 16:41:11 1987
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f README -a "${1}" != "-c" ; then
echo shar: Will not over-write existing file \"README\"
else
echo shar: Extracting \"README\" \(270 characters\)
sed "s/^X//" >README <<'END_OF_README'
XThis program cascades letters from the top of the terminal screen
Xto the bottom in a waterfall effect. The original program has had
Xseveral bugs fixed and added capability to properly handle padding.
XAlso, this will be pretty slow at lower baudrates.
X
X 4/22/87 BR
END_OF_README
if test 270 -ne `wc -c <README`; then
echo shar: \"README\" unpacked with wrong size!
fi
# end of overwriting check
fi
if test -f MANIFEST -a "${1}" != "-c" ; then
echo shar: Will not over-write existing file \"MANIFEST\"
else
echo shar: Extracting \"MANIFEST\" \(294 characters\)
sed "s/^X//" >MANIFEST <<'END_OF_MANIFEST'
X File Name Archive # Description
X-----------------------------------------------------------
X MANIFEST 1 This shipping list
X Makefile 1
X README 1
X patchlvl.h 1
X rot.1 1
X rot.c 1
END_OF_MANIFEST
if test 294 -ne `wc -c <MANIFEST`; then
echo shar: \"MANIFEST\" unpacked with wrong size!
fi
# end of overwriting check
fi
if test -f Makefile -a "${1}" != "-c" ; then
echo shar: Will not over-write existing file \"Makefile\"
else
echo shar: Extracting \"Makefile\" \(129 characters\)
sed "s/^X//" >Makefile <<'END_OF_Makefile'
X# Simple makefile for rot program
X
XCFLAGS = -O #-DSYSV
X
Xrot: rot.c
X cc $(CFLAGS) -o rot rot.c -ltermlib
X
Xtest: rot
X ./rot <rot.c
END_OF_Makefile
if test 129 -ne `wc -c <Makefile`; then
echo shar: \"Makefile\" unpacked with wrong size!
fi
# end of overwriting check
fi
if test -f patchlvl.h -a "${1}" != "-c" ; then
echo shar: Will not over-write existing file \"patchlvl.h\"
else
echo shar: Extracting \"patchlvl.h\" \(76 characters\)
sed "s/^X//" >patchlvl.h <<'END_OF_patchlvl.h'
X#define PATCHLEVEL 2
X
X#define ROT_VERSION "2.0 patchlevel 2, 22 April 1987"
END_OF_patchlvl.h
if test 76 -ne `wc -c <patchlvl.h`; then
echo shar: \"patchlvl.h\" unpacked with wrong size!
fi
# end of overwriting check
fi
if test -f rot.1 -a "${1}" != "-c" ; then
echo shar: Will not over-write existing file \"rot.1\"
else
echo shar: Extracting \"rot.1\" \(986 characters\)
sed "s/^X//" >rot.1 <<'END_OF_rot.1'
X.TH ROT 6
X.SH NAME
Xrot \- a visual demonstration of
X.I software
X.I rot.
X.SH SYNOPSIS
X.B rot
X<file>
X.PP
XThis program cascades letters from the top of the terminal screen
Xto the bottom in a waterfall effect.
X.PP
XThis program reads from standard input and can be used as
Xan output
Xfilter.
XAn amusing use is:
X.sp
X man rot | col -b | rot
X.SH AUTHOR
X.PP
XOriginal source from Peter da Silva
X.br
X (ihnp4!shell!neuro1!hyd-ptd!peter) or
X.br
X (ihnp4!shell!neuro1!datafact!peter) or
X.br
X (ihnp4!shell!neuro1!baylor!peter).
X.sp
XMakefile and README from Bill Randle (billr@tekred.TEK.COM).
X.sp
XMan page from John G Dobnick
X.br
X (ihnp4!uwmcsd1!jgd) or
X.br
X (jgd@csd1.milw.wisc.edu).
X.sp
XBug fixes from:
X.br
X James Buster (bitbug@ucscb.ucsc.edu)
X.br
X Ed Falk (ed@sun -?)
X.br
X Andrew Klossner (andrew@lemming.gwd.tek.com)
X.br
X Andrew Scott Beals (bandy@amdcad.amd.com)
X.br
X Colin Plumb (ccplumb@watmath.uucp)
X.br
X Bill Randle (billr@tekred.tek.com)
X.SH BUGS
XThis is pretty slow at lower baudrates.
END_OF_rot.1
if test 986 -ne `wc -c <rot.1`; then
echo shar: \"rot.1\" unpacked with wrong size!
fi
# end of overwriting check
fi
if test -f rot.c -a "${1}" != "-c" ; then
echo shar: Will not over-write existing file \"rot.c\"
else
echo shar: Extracting \"rot.c\" \(10363 characters\)
sed "s/^X//" >rot.c <<'END_OF_rot.c'
X/*
X * Revision History:
X *
X * Original source from:
X * Peter da Silva (ihnp4!shell!neuro1!{hyd-ptd,datafact,baylor}!peter)
X *
X * Changes for padding added by:
X * Andrew Scott Beals ({ucbvax,decwrl}!amdcad!bandy or bandy@amdcad.amd.com)
X * 20 April 1987
X *
X * Additional changes for padding, fix for computation of tglen,
X * increase max lines, improve termlib handling, add System V #ifdefs.
X * Bill Randle (billr@tekred.TEK.COM)
X * 21 April 1987
X *
X * Add padding for cl.
X * Andrew Scott Beals ({ucbvax,decwrl}!amdcad!bandy or bandy@amdcad.amd.com)
X * 22 April 1987
X *
X * Add comments and scroll fixes from Colin Plumb (ccplumb@watmath.UUCP)
X * More terminal handling cleanup and error checking.
X * Bill Randle (billr@tekred.TEK.COM)
X * 22 April 1987
X */
X
X#include <stdio.h>
X#include "patchlvl.h"
X
X#ifdef SYSV
X# include <termio.h>
X#else
X# include <sgtty.h>
X#endif
X
X/* -- Miscellaneous defines -- */
X#define FALSE 0
X#define TRUE 1
X#define MAXCOL 80
X#define MAXLI 36
X
X#define min(a,b) ((a)<(b) ? a : b)
X
Xextern char *tgetstr();
X
Xint lastx, lasty;
Xstruct _c {
X struct _c *c_next;
X int c_line, c_column;
X char c_mark;
X} *clist;
X
X/* -- Global variables -- */
Xchar *tent; /* Pointer to tbuf */
Xextern char PC; /* Pad character */
Xextern char *UP, *BC; /* Upline, backsapce character */
Xextern short ospeed; /* Terminal output speed */
Xint tglen, bclen;
X
Xchar *cm, /* Cursor motion */
X *cl, /* Clear screen */
X *ti, /* Init terminal */
X *te; /* Reset terminal */
Xint li, /* lines on screen */
X co; /* columns ditto */
Xchar screen[MAXLI+1][MAXCOL];
Xchar newscreen[MAXLI+1][MAXCOL];
X
Xmain(ac, av)
Xint ac;
Xchar **av;
X{
X /* set ospeed so padding works correctly */
X#ifdef SYSV
X struct termio p;
X
X if(ioctl(1, TCGETA, &p) != -1)
X ospeed=p.c_cflag & CBAUD;
X#else
X struct sgttyb p;
X
X if(ioctl(1, TIOCGETP, &p) != -1)
X ospeed=p.sg_ospeed;
X#endif
X
X srand(getpid()); /* init random number generator */
X tinit(getenv("TERM")); /* init terminal */
X if(ac > 1)
X /* do all files */
X while(--ac)
X dropf(*++av);
X else
X /* or stdin */
X fdropf(stdin);
X tend(); /* clean up terminal */
X}
X
X/* put character c at (x, y) */
Xat(x, y, c)
Xint x, y;
Xchar c;
X{
X#ifdef DEBUG
X _at(x, y);
X#else
X /* optimize cursor motion if goal is on *same* line */
X if(y==lasty) {
X if(x!=lastx) {
X if(x<lastx && (lastx-x)*bclen<tglen)
X /* backspace into place if it takes */
X /* less characters than cursor motion */
X while(x<lastx) {
X if (bclen > 1)
X outs(BC);
X else
X putchar(*BC);
X lastx--;
X }
X else if(x>lastx && x-lastx<tglen)
X /* print intervening characters */
X while(x>lastx) {
X putchar(newscreen[lasty][lastx]);
X lastx++;
X }
X else
X _at(x, y);
X }
X } else
X _at(x, y);
X#endif
X c &= ~0200;
X putchar(c);
X if(c >= ' ' && c != '\177')
X lastx++;
X if(lastx>=co) {
X lastx -= co;
X lasty++;
X }
X}
X
X_at(x, y)
Xint x, y;
X{
X extern void outc();
X
X tputs(tgoto(cm, x, y), 1, outc); /* handle padding */
X lastx = x;
X lasty = y;
X}
X
Xvoid
Xoutc(c)
Xregister c;
X{
X putc(c, stdout);
X}
X
X/* initialize terminal dependent variables */
Xtinit(name)
Xchar *name;
X{
X static char junkbuf[1024], *junkptr;
X char tbuf[1024];
X int intr();
X
X junkptr = junkbuf;
X
X tgetent(tbuf, name);
X
X if (!tgetflag("bs")) /* is backspace not used? */
X BC = tgetstr("bc",&junkptr); /* find out what is */
X else
X BC = "\b"; /* make a backspace handy */
X bclen = strlen(BC); /* for optimization stuff */
X if (tgetstr("pc", &junkptr) != NULL)
X PC = *junkptr; /* set pad character */
X else
X PC = '\0';
X UP = tgetstr("up", &junkptr);
X cm = tgetstr("cm", &junkptr);
X if (cm == NULL) {
X printf("Can't rot on dumb terminals.\n");
X exit(1);
X }
X cl = tgetstr("cl", &junkptr);
X ti = tgetstr("ti", &junkptr);
X te = tgetstr("te", &junkptr);
X li = min(tgetnum("li"), MAXLI);
X if (li == -1)
X li = 24;
X /* the original code had special case code for last line and */
X /* last column. Unfortunately, it didn't always work on all */
X /* terminals so we take the easy way out and don't use the */
X /* bottom line of the screen */
X li--; /* prevent bottom screen line from scrolling */
X co = min(tgetnum("co"), MAXCOL);
X if (co == -1)
X co = 80;
X tglen = strlen(tgoto(cm, co-1, li-1)); /* for optimization stuff */
X if (ti != NULL)
X outs(ti);
X}
X
X/* cleanup terminal after use */
Xtend()
X{
X if (te != NULL)
X outs(te);
X _at(0, li);
X putchar('\n');
X fflush(stdout);
X}
X
X/* read in a new screen */
Xreadscreen(fp)
XFILE *fp;
X{
X int line, column, p;
X char tmp[256];
X
X for(line=0; line<li; line++)
X for(column=0; column<co; column++)
X newscreen[line][column] = screen[line][column] = ' ';
X for(column=0; column<co; column++)
X newscreen[li][column] = screen[li][column] = '*';
X line=0;
X while(line<li) {
X if(!fgets(tmp, 256, fp))
X return;
X
X for(column=0, p=0; tmp[p]; p++) {
X tmp[p] &= ~0200;
X if(tmp[p] < ' ' || tmp[p] == 127)
X switch(tmp[p]) {
X case '\t':
X while(++column % 8)
X continue;
X break;
X case '\n':
X column = 0;
X line++;
X break;
X default:
X newscreen[line][column] = '^';
X column++;
X if(column>=co) {
X column -= co;
X line++;
X }
X newscreen[line][column] =
X (tmp[p]+'@') & 127;
X column++;
X break;
X }
X else {
X newscreen[line][column] = tmp[p];
X column++;
X }
X if(column >= co) {
X column -= co;
X line++;
X }
X if(line >= li)
X break;
X }
X }
X for(column=0; column<co; column++)
X newscreen[line][column] = screen[li][column] = '*';
X}
X
Xdrawscreen()
X{
X extern void outc();
X
X lastx = lasty = 0;
X if (cl != NULL)
X tputs(cl, li, outc); /* for really slow terminals */
X update();
X}
X
X/* copy newscreen[][] to physical screen and screen[][] */
Xupdate()
X{
X int l, c;
X
X for(l=0; l<li; l++)
X for(c=0; c<co; c++)
X /* copy any changes */
X if(screen[l][c] != newscreen[l][c]) {
X /* are they *really* different? */
X if((screen[l][c] & ~0200) !=
X (newscreen[l][c] & ~0200))
X at(c, l, newscreen[l][c]);
X screen[l][c] = newscreen[l][c];
X }
X}
X
X/* add char at (column, line) to clist if feasable */
Xdrop(line, column)
Xint line, column;
X{
X struct _c *hold;
X
X if(line<0 || line>=li || column<0 || column>=co || /* off screen */
X screen[line][column]==' ' || /* empty */
X screen[line][column] & 0200) /* already in list */
X return;
X if(screen[line+1][column]!=' ' &&
X (column==co-1 ||screen[line+1][column+1]!=' ') &&
X (column==0 ||screen[line+1][column-1]!=' ')) /* can't be dropped */
X return;
X
X hold = (struct _c *) malloc(sizeof(struct _c));
X hold -> c_next = clist;
X hold -> c_column = column;
X hold -> c_line = line;
X hold -> c_mark = 0;
X screen[line][column] |= 0200;
X clist = hold;
X}
X
X/* drop everything in the clist */
Xdrops()
X{
X int line, column;
X struct _c *hold;
X
X for(hold = clist; hold; hold=hold->c_next) {
X line = hold->c_line;
X column = hold->c_column;
X /* add adjacent characters to clist */
X drop(line+1, column);
X drop(line, column+1);
X drop(line-1, column);
X drop(line, column-1);
X /* drop straight down if possible */
X if(newscreen[line+1][column]==' ') {
X newscreen[line+1][column] = screen[line][column];
X newscreen[line][column] = ' ';
X line++;
X }
X /* otherwise try and drop to the sides. Randomly pick
X /* which side to try first. */
X else if(rand()&01000) {
X if(column>0 && newscreen[line][column-1] == ' ' &&
X newscreen[line+1][column-1]==' ') {
X newscreen[line][column-1] =
X screen[line][column];
X newscreen[line][column] = ' ';
X column--;
X }
X else if(column<co-1 &&
X newscreen[line][column+1] == ' ' &&
X newscreen[line+1][column+1]==' ') {
X newscreen[line][column+1] =
X screen[line][column];
X newscreen[line][column] = ' ';
X column++;
X }
X else {
X /* forget it */
X screen[line][column] &= ~0200;
X newscreen[line][column] &= ~0200;
X hold -> c_mark = 1;
X }
X } else {
X if(column<co-1 && newscreen[line][column+1] == ' ' &&
X newscreen[line+1][column+1]==' ') {
X newscreen[line][column+1] =
X screen[line][column];
X newscreen[line][column] = ' ';
X column++;
X }
X else if(column>0 && newscreen[line][column-1] == ' ' &&
X newscreen[line+1][column-1]==' ') {
X newscreen[line][column-1] =
X screen[line][column];
X newscreen[line][column] = ' ';
X column--;
X }
X else {
X /* forget it */
X newscreen[line][column] &= ~0200;
X screen[line][column] &= ~0200;
X hold -> c_mark = 1;
X }
X }
X /* update list entry */
X hold -> c_column = column;
X hold -> c_line = line;
X }
X
X /* delete all list entries marked for deletion */
X /* do all at head of list */
X while(clist && clist->c_mark) {
X struct _c *p = clist;
X clist = clist -> c_next;
X free(p);
X }
X /* ...and all in body */
X hold = clist;
X while(hold && hold->c_next)
X if(hold->c_next->c_mark) {
X struct _c *p = hold->c_next;
X hold->c_next = p->c_next;
X free(p);
X } else
X hold=hold->c_next;
X}
X
Xdroplet(line, column)
Xint line, column;
X{
X int ret;
X while(column>=0 && screen[line][column]!=' ')
X column--;
X column++;
X while(column<co && screen[line][column]!=' ')
X drop(line, column++);
X ret = clist != 0;
X while(clist) {
X drops();
X update();
X }
X return ret;
X}
X
Xdropscreen()
X{
X int column, line;
X int rubbish = 0, count = 0;
X
X do {
X int start, limit, incr;
X count++;
X rubbish = 0;
X if(count&1) { start=li-2; limit=0; incr = -1; }
X else { start=0; limit=li-2; incr=1; }
X for(line=start; line!=limit && !rubbish; line+=incr) {
X if(line&1)
X for(column=0; column<co && !rubbish; column++)
X rubbish += droplet(line, column);
X else
X for(column=co-1; column>=0 && !rubbish; column--)
X rubbish += droplet(line, column);
X }
X } while(rubbish);
X}
X
Xdropf(file)
Xchar *file;
X{
X FILE *fp;
X
X if((fp = fopen(file, "r")) == NULL) {
X perror(file);
X return;
X }
X fdropf(fp);
X}
X
Xfdropf(fp)
XFILE *fp;
X{
X int i;
X
X while(!feof(fp)) {
X readscreen(fp);
X drawscreen();
X for(i=0; i<20; i++)
X droplet((rand()>>4) % li, (rand()>>4) % co);
X dropscreen();
X }
X}
X
Xouts(s)
Xchar *s;
X{
X fputs(s, stdout);
X}
END_OF_rot.c
if test 10363 -ne `wc -c <rot.c`; then
echo shar: \"rot.c\" unpacked with wrong size!
fi
# end of overwriting check
fi
echo shar: End of archive 1 \(of 1\).
cp /dev/null ark1isdone
MISSING=""
for I in 1 ; do
if test ! -f ark${I}isdone ; then
MISSING="${MISSING} ${I}"
fi
done
if test "${MISSING}" = "" ; then
echo You have unpacked all 1 archives.
rm -f ark[1-9]isdone
else
echo You still need to unpack the following archives:
echo " " ${MISSING}
fi
## End of shell archive.mon@u23: