V10/cmd/troff/ta.c
/*
* drive hp2621 terminal
* just to see stuff quickly. like troff -a
*/
/*
output language from troff:
all numbers are character strings
sn size in points
fn font as number from 1-n
cx ascii character x
Cxyz funny char xyz. terminated by white space
Hn go to absolute horizontal position n
Vn go to absolute vertical position n (down is positive)
hn go n units horizontally (relative)
vn ditto vertically
nnc move right nn, then print c (exactly 2 digits!)
(this wart is an optimization that shrinks output file size
about 35% and run-time about 15% while preserving ascii-ness)
dt ...\n draw operation 't':
d/ dx dy c line from here to dx,dy using c
dO r circle of radius r centered here
dE rx ry ellipse of semi-axes rx, ry centered here
dA dx1 dy1 dx2 dy2 arc counter-clockwise with center here
from dx1,dy1 to dx2,dy2.
nb a end of line (information only -- no action needed)
b = space before line, a = after
p new page begins -- set v to 0
#...\n comment
x ...\n device control functions:
x i init
x T s name of device is s
x r n h v resolution is n/inch
h = min horizontal motion, v = min vert
x p pause (can restart)
x s stop -- done for ever
x t generate trailer
x f n s font position n contains font s
Subcommands like "i" are often spelled out like "init".
*/
#include <stdio.h>
#include <signal.h>
#include <ctype.h>
#include "dev.h"
#define NFONT 10
int output = 0; /* do we do output at all? */
int nolist = 0; /* output page list if > 0 */
int olist[20]; /* pairs of page numbers */
int wflag = 0; /* wait, looping, for new input if on */
struct dev dev;
struct font *fontbase[NFONT];
short psizes[] ={ 11, 16, 22, 36, 0}; /* approx sizes available */
short *pstab = psizes;
int nsizes = 1;
int nfonts;
int smnt; /* index of first special font */
int nchtab;
char *chname;
short *chtab;
char *fitab[NFONT];
char *widthtab[NFONT]; /* widtab would be a better name */
char *codetab[NFONT]; /* device codes */
#define FATAL 1
#define BMASK 0377
int dbg = 0;
int res = 972; /* input assumed computed according to this resolution */
/* initial value to avoid 0 divide */
FILE *tf = stdout; /* output file */
char *fontdir = "/usr/lib/font";
extern char devname[];
FILE *fp = stdin; /* input file pointer */
main(argc, argv)
char *argv[];
{
char buf[BUFSIZ];
int done();
float atof();
setbuf(stdout, buf);
while (argc > 1 && argv[1][0] == '-') {
switch (argv[1][1]) {
case 'o':
outlist(&argv[1][2]);
break;
case 'd':
dbg = atoi(&argv[1][2]);
if (dbg == 0) dbg = 1;
break;
}
argc--;
argv++;
}
if (argc <= 1)
conv(stdin);
else
while (--argc > 0) {
if (strcmp(*++argv, "-") == 0)
fp = stdin;
else if ((fp = fopen(*argv, "r")) == NULL)
error(FATAL, "can't open %s", *argv);
conv(fp);
fclose(fp);
}
done();
}
outlist(s) /* process list of page numbers to be printed */
char *s;
{
int n1, n2, i;
nolist = 0;
while (*s) {
n1 = 0;
if (isdigit(*s))
do
n1 = 10 * n1 + *s++ - '0';
while (isdigit(*s));
else
n1 = -9999;
n2 = n1;
if (*s == '-') {
s++;
n2 = 0;
if (isdigit(*s))
do
n2 = 10 * n2 + *s++ - '0';
while (isdigit(*s));
else
n2 = 9999;
}
olist[nolist++] = n1;
olist[nolist++] = n2;
if (*s != '\0')
s++;
}
olist[nolist] = 0;
if (dbg)
for (i=0; i<nolist; i += 2)
printf("%3d %3d\n", olist[i], olist[i+1]);
}
in_olist(n) /* is n in olist? */
int n;
{
int i;
if (nolist == 0)
return(1); /* everything is included */
for (i = 0; i < nolist; i += 2)
if (n >= olist[i] && n <= olist[i+1])
return(1);
return(0);
}
conv(fp)
register FILE *fp;
{
register int c, k;
int m, n, i, n1, m1;
char str[100], buf[300];
while ((c = getc(fp)) != EOF) {
switch (c) {
case '\n': /* when input is text */
case ' ':
case 0: /* occasional noise creeps in */
break;
case '{': /* push down current environment */
t_push();
break;
case '}':
t_pop();
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
/* two motion digits plus a character */
hmot((c-'0')*10 + getc(fp)-'0');
put1(getc(fp));
break;
case 'c': /* single ascii character */
put1(getc(fp));
break;
case 'C':
fscanf(fp, "%s", str);
put1s(str);
break;
case 't': /* straight text */
fgets(buf, sizeof(buf), fp);
t_text(buf);
break;
case 'D': /* draw function */
fgets(buf, sizeof(buf), fp);
switch (buf[0]) {
case 'l': /* draw a line */
sscanf(buf+1, "%d %d", &n, &m);
drawline(n, m, ".");
break;
case 'c': /* circle */
sscanf(buf+1, "%d", &n);
drawcirc(n);
break;
case 'e': /* ellipse */
sscanf(buf+1, "%d %d", &m, &n);
drawellip(m, n);
break;
case 'a': /* arc */
sscanf(buf+1, "%d %d %d %d", &n, &m, &n1, &m1);
drawarc(n, m, n1, m1);
break;
case '~': /* wiggly line */
drawwig(buf+1);
break;
default:
error(FATAL, "unknown drawing function %s\n", buf);
break;
}
break;
case 's':
fscanf(fp, "%d", &n); /* ignore fractional sizes */
setsize(t_size(n));
break;
case 'f':
fscanf(fp, "%s", str);
setfont(t_font(str));
break;
case 'H': /* absolute horizontal motion */
/* fscanf(fp, "%d", &n); */
while ((c = getc(fp)) == ' ')
;
k = 0;
do {
k = 10 * k + c - '0';
} while (isdigit(c = getc(fp)));
ungetc(c, fp);
hgoto(k);
break;
case 'h': /* relative horizontal motion */
/* fscanf(fp, "%d", &n); */
while ((c = getc(fp)) == ' ')
;
k = 0;
do {
k = 10 * k + c - '0';
} while (isdigit(c = getc(fp)));
ungetc(c, fp);
hmot(k);
break;
case 'w': /* word space */
putc(' ', stdout);
break;
case 'V':
fscanf(fp, "%d", &n);
vgoto(n);
break;
case 'v':
fscanf(fp, "%d", &n);
vmot(n);
break;
case 'p': /* new page */
fscanf(fp, "%d", &n);
t_page(n);
break;
case 'n': /* end of line */
while (getc(fp) != '\n')
;
t_newline();
break;
case '#': /* comment */
while (getc(fp) != '\n')
;
break;
case 'x': /* device control */
devcntrl(fp);
break;
default:
error(!FATAL, "unknown input character %o %c\n", c, c);
done();
}
}
}
devcntrl(fp) /* interpret device control functions */
FILE *fp;
{
char str[20];
int c, n;
fscanf(fp, "%s", str);
switch (str[0]) { /* crude for now */
case 'i': /* initialize */
fileinit();
t_init(0);
break;
case 'T': /* device name */
fscanf(fp, "%s", devname);
break;
case 't': /* trailer */
t_trailer();
break;
case 'p': /* pause -- can restart */
t_reset('p');
break;
case 's': /* stop */
t_reset('s');
break;
case 'r': /* resolution assumed when prepared */
fscanf(fp, "%d", &res);
break;
case 'f': /* font used */
fscanf(fp, "%d %s", &n, str);
loadfont(n, str);
break;
}
while (getc(fp) != '\n') /* skip rest of input line */
;
}
fileinit() /* read in font and code files, etc. */
{
}
fontprint(i) /* debugging print of font i (0,...) */
{
}
loadcode(n, nw) /* load codetab on position n (0...); #chars is nw */
int n, nw;
{
}
loadfont(n, s) /* load font info for font s on position n (1...) */
int n;
char *s;
{
}
error(f, s, a1, a2, a3, a4, a5, a6, a7) {
fprintf(stderr, "ta: ");
fprintf(stderr, s, a1, a2, a3, a4, a5, a6, a7);
fprintf(stderr, "\n");
if (f)
exit(1);
}
/*
Here beginneth all the stuff that really depends
on the 202 (we hope).
*/
char devname[20] = "hp2621";
#define ESC 033
#define HOME 'H'
#define CLEAR 'J'
#define FF 014
int size = 1;
int font = 1; /* current font */
int hpos; /* horizontal position where we are supposed to be next (left = 0) */
int vpos; /* current vertical position (down positive) */
int horig; /* h origin of current block; hpos rel to this */
int vorig; /* v origin of current block; vpos rel to this */
int DX = 10; /* step size in x for drawing */
int DY = 10; /* step size in y for drawing */
int drawdot = '.'; /* draw with this character */
int drawsize = 1; /* shrink by this factor when drawing */
t_init(reinit) /* initialize device */
int reinit;
{
int i, j;
fflush(stdout);
hpos = vpos = 0;
}
#define MAXSTATE 5
struct state {
int ssize;
int sfont;
int shpos;
int svpos;
int shorig;
int svorig;
};
struct state state[MAXSTATE];
struct state *statep = state;
t_push() /* begin a new block */
{
hflush();
statep->ssize = size;
statep->sfont = font;
statep->shorig = horig;
statep->svorig = vorig;
statep->shpos = hpos;
statep->svpos = vpos;
horig = hpos;
vorig = vpos;
hpos = vpos = 0;
if (statep++ >= state+MAXSTATE)
error(FATAL, "{ nested too deep");
hpos = vpos = 0;
}
t_pop() /* pop to previous state */
{
if (--statep < state)
error(FATAL, "extra }");
size = statep->ssize;
font = statep->sfont;
hpos = statep->shpos;
vpos = statep->svpos;
horig = statep->shorig;
vorig = statep->svorig;
}
int np; /* number of pages seen */
int npmax; /* high-water mark of np */
int pgnum[40]; /* their actual numbers */
long pgadr[40]; /* their seek addresses */
t_page(n) /* do whatever new page functions */
{
long ftell();
int c, m, i;
char buf[100], *bp;
pgnum[np++] = n;
pgadr[np] = ftell(fp);
if (np > npmax)
npmax = np;
if (output == 0) {
output = in_olist(n);
t_init(1);
return;
}
/* have just printed something, and seen p<n> for next one */
putpage();
fflush(stdout);
}
putpage()
{
int i, j, k;
fflush(stdout);
}
t_newline() /* do whatever for the end of a line */
{
printf("\n");
hpos = 0;
}
t_size(n) /* convert integer to internal size number*/
int n;
{
}
t_font(s) /* convert string to internal font number */
char *s;
{
}
t_text(s) /* print string s as text */
char *s;
{
int c, w;
char str[100];
if (!output)
return;
while ((c = *s++) != '\n') {
if (c == '\\') {
switch (c = *s++) {
case '\\':
case 'e':
put1('\\');
break;
case '(':
str[0] = *s++;
str[1] = *s++;
str[2] = '\0';
put1s(str);
break;
}
} else {
put1(c);
}
hmot(w);
}
}
t_reset(c)
{
int n;
output = 1;
fflush(stdout);
if (c == 's')
t_page(9999);
}
t_trailer()
{
}
hgoto(n)
{
hpos = n; /* this is where we want to be */
/* before printing a character, */
/* have to make sure it's true */
}
hmot(n) /* generate n units of horizontal motion */
int n;
{
hgoto(hpos + n);
}
hflush() /* actual horizontal output occurs here */
{
}
vgoto(n)
{
vpos = n;
}
vmot(n) /* generate n units of vertical motion */
int n;
{
vgoto(vpos + n); /* ignores rounding */
}
put1s(s) /* s is a funny char name */
char *s;
{
int i;
char *p;
extern char *spectab[];
static char prev[10] = "";
static int previ;
if (!output)
return;
if (strcmp(s, prev) != 0) {
previ = -1;
for (i = 0; spectab[i] != 0; i += 2)
if (strcmp(spectab[i], s) == 0) {
strcpy(prev, s);
previ = i;
break;
}
}
if (previ >= 0) {
for (p = spectab[previ+1]; *p; p++)
putc(*p, stdout);
} else
prev[0] = 0;
}
put1(c) /* output char c */
int c;
{
if (!output)
return;
putc(c, stdout);
}
setsize(n) /* set point size to n (internal) */
int n;
{
}
t_fp(n, s) /* font position n now contains font s */
int n;
char *s;
{
}
setfont(n) /* set font to n */
int n;
{
}
done()
{
output = 1;
putpage();
fflush(stdout);
exit(0);
}
char *spectab[] ={
"em", "-",
"hy", "-",
"en", "-",
"ru", "_",
"l.", ".",
"br", "|",
"vr", "|",
"fm", "'",
"or", "|",
0, 0,
};