Import sources from 2011-03-30 iso image

1 files changed, 1225 insertions, 0 deletions

diff --git a/sys/src/cmd/postscript/postdaisy/postdaisy.c b/sys/src/cmd/postscript/postdaisy/postdaisy.c
new file mode 100755
index 000000000..8588cf9af
--- /dev/null
+++ b/sys/src/cmd/postscript/postdaisy/postdaisy.c
@@ -0,0 +1,1225 @@
+/*
+ *
+ * postdaisy - PostScript translator for Diablo 1640 files.
+ *
+ * A program that translates Diablo 1640 files into PostScript. Absolutely nothing
+ * is guaranteed. Quite a few things haven't been implemented, and what's been
+ * done isn't well tested. Most of the documentation used to write this program
+ * was taken from the 'Diablo Emulator' section of a recent Imagen manual.
+ *
+ * Some of document comments that are generated may not be right. Most of the test
+ * files I used produced a trailing blank page. I've put a check in formfeed() that
+ * won't print the last page if it doesn't contain any text, but PAGES comments may
+ * not be right. The DOCUMENTFONTS comment will also be wrong if auto underline or
+ * bold printing have been turned on by escape commands.
+ *
+ * The brute force approach used to implement horizontal and vertical tabs leaves
+ * much to be desired, and may not work for very small initial hmi and vmi values.
+ * At the very least I should have used malloc() to get space for the two tabstop
+ * arrays after hmi and vmi are known!
+ *
+ * Reverse printing mode hasn't been tested at all, but what's here should be
+ * close even though it's not efficient.
+ *
+ * The PostScript prologue is copied from *prologue before any of the input files
+ * are translated. The program expects that the following PostScript procedures
+ * are defined in that file:
+ *
+ *	setup
+ *
+ *	  mark ... setup -
+ *
+ *	    Handles special initialization stuff that depends on how this program
+ *	    was called. Expects to find a mark followed by key/value pairs on the
+ *	    stack. The def operator is applied to each pair up to the mark, then
+ *	    the default state is set up.
+ *
+ *	pagesetup
+ *
+ *	  page pagesetup -
+ *
+ *	    Does whatever is needed to set things up for the next page. Expects to
+ *	    find the current page number on the stack.
+ *
+ *	t
+ *
+ *	  mark str1 x1 str2 x2 ... strn xn y hmi t mark
+ *
+ *	    Handles all the text on the stack. Characters in the strings are
+ *	    printed using hmi as the character advance, and all strings are at
+ *	    vertical position y. Each string is begins at the horizontal position
+ *	    that preceeds it.
+ *
+ *	f
+ *
+ *	  font f -
+ *
+ *	    Use font f, where f is the full PostScript font name. Only used when
+ *	    we switch to auto underline (Courier-Italic) or bold (Courier-Bold)
+ *	    printing.
+ *
+ *	done
+ *
+ *	  done
+ *
+ *	    Makes sure the last page is printed. Only needed when we're printing
+ *	    more than one page on each sheet of paper.
+ *
+ * Many default values, like the magnification and orientation, are defined in 
+ * the prologue, which is where they belong. If they're changed (by options), an
+ * appropriate definition is made after the prologue is added to the output file.
+ * The -P option passes arbitrary PostScript through to the output file. Among
+ * other things it can be used to set (or change) values that can't be accessed by
+ * other options.
+ *
+ */
+
+#include <stdio.h>
+#include <signal.h>
+#include <ctype.h>
+#ifdef plan9
+#define	isascii(c)	((unsigned char)(c)<=0177)
+#endif
+#include <sys/types.h>
+#include <fcntl.h>
+
+#include "comments.h"			/* PostScript file structuring comments */
+#include "gen.h"			/* general purpose definitions */
+#include "path.h"			/* for the prologue */
+#include "ext.h"			/* external variable declarations */
+#include "postdaisy.h"			/* a few special definitions */
+
+char	*optnames = "a:c:f:h:l:m:n:o:p:r:s:v:x:y:A:C:E:J:L:P:DI";
+
+char	*prologue = POSTDAISY;		/* default PostScript prologue */
+char	*formfile = FORMFILE;		/* stuff for multiple pages per sheet */
+
+int	formsperpage = 1;		/* page images on each piece of paper */
+int	copies = 1;			/* and this many copies of each sheet */
+
+char	htabstops[COLUMNS];		/* horizontal */
+char	vtabstops[ROWS];		/* and vertical tabs */
+
+int	res = RES;			/* input file resolution - sort of */
+
+int	hmi = HMI;			/* horizontal motion index - 1/120 inch */
+int	vmi = VMI;			/* vertical motion index - 1/48 inch */
+int	ohmi = HMI;			/* original hmi */
+int	ovmi = VMI;			/* and vmi - for tabs and char size */
+
+int	hpos = 0;			/* current horizontal */
+int	vpos = 0;			/* and vertical position */
+
+int	lastx = -1;			/* printer's last horizontal */
+int	lasty = -1;			/* and vertical position */
+int	lasthmi = -1;			/* hmi for current text strings */
+
+int	lastc = -1;			/* last printed character */
+int	prevx = -1;			/* at this position */
+
+int	leftmargin = LEFTMARGIN;	/* page margins */
+int	rightmargin = RIGHTMARGIN;
+int	topmargin = TOPMARGIN;
+int	bottommargin = BOTTOMMARGIN;
+
+int	stringcount = 0;		/* number of strings on the stack */
+int	stringstart = 1;		/* column where current one starts */
+int	advance = 1;			/* -1 if in backward print mode */
+
+int	lfiscr = OFF;			/* line feed implies carriage return */
+int	crislf = OFF;			/* carriage return implies line feed */
+
+int	linespp = 0;			/* lines per page if it's positive */
+int	markedpage = FALSE;		/* helps prevent trailing blank page */
+int	page = 0;			/* page we're working on */
+int	printed = 0;			/* printed this many pages */
+
+Fontmap	fontmap[] = FONTMAP;		/* for translating font names */
+char	*fontname = "Courier";		/* use this PostScript font */
+int	shadowprint = OFF;		/* automatic bold printing if ON */
+
+FILE	*fp_in;				/* read from this file */
+FILE	*fp_out = stdout;		/* and write stuff here */
+FILE	*fp_acct = NULL;		/* for accounting data */
+
+/*****************************************************************************/
+
+main(agc, agv)
+
+    int		agc;
+    char	*agv[];
+
+{
+
+/*
+ *
+ * A simple program that translates Diablo 1640 files into PostScript. Nothing
+ * is guaranteed - the program not well tested and doesn't implement everything.
+ *
+ */
+
+    argc = agc;				/* other routines may want them */
+    argv = agv;
+
+    prog_name = argv[0];		/* really just for error messages */
+
+    init_signals();			/* sets up interrupt handling */
+    header();				/* PostScript header comments */
+    options();				/* handle the command line options */
+    setup();				/* for PostScript */
+    arguments();			/* followed by each input file */
+    done();				/* print the last page etc. */
+    account();				/* job accounting data */
+
+    exit(x_stat);			/* not much could be wrong */
+
+}   /* End of main */
+
+/*****************************************************************************/
+
+init_signals()
+
+{
+
+/*
+ *
+ * Makes sure we handle interrupts.
+ *
+ */
+
+    if ( signal(SIGINT, interrupt) == SIG_IGN )  {
+	signal(SIGINT, SIG_IGN);
+	signal(SIGQUIT, SIG_IGN);
+	signal(SIGHUP, SIG_IGN);
+    } else {
+	signal(SIGHUP, interrupt);
+	signal(SIGQUIT, interrupt);
+    }   /* End else */
+
+    signal(SIGTERM, interrupt);
+
+}   /* End of init_signals */
+
+/*****************************************************************************/
+
+header()
+
+{
+
+    int		ch;			/* return value from getopt() */
+    int		old_optind = optind;	/* for restoring optind - should be 1 */
+
+/*
+ *
+ * Scans the option list looking for things, like the prologue file, that we need
+ * right away but could be changed from the default. Doing things this way is an
+ * attempt to conform to Adobe's latest file structuring conventions. In particular
+ * they now say there should be nothing executed in the prologue, and they have
+ * added two new comments that delimit global initialization calls. Once we know
+ * where things really are we write out the job header, follow it by the prologue,
+ * and then add the ENDPROLOG and BEGINSETUP comments.
+ *
+ */
+
+    while ( (ch = getopt(argc, argv, optnames)) != EOF )
+	if ( ch == 'L' )
+	    prologue = optarg;
+	else if ( ch == '?' )
+	    error(FATAL, "");
+
+    optind = old_optind;		/* get ready for option scanning */
+
+    fprintf(stdout, "%s", CONFORMING);
+    fprintf(stdout, "%s %s\n", VERSION, PROGRAMVERSION);
+    fprintf(stdout, "%s %s\n", DOCUMENTFONTS, ATEND);
+    fprintf(stdout, "%s %s\n", PAGES, ATEND);
+    fprintf(stdout, "%s", ENDCOMMENTS);
+
+    if ( cat(prologue) == FALSE )
+	error(FATAL, "can't read %s", prologue);
+
+    if ( DOROUND )
+	cat(ROUNDPAGE);
+
+    fprintf(stdout, "%s", ENDPROLOG);
+    fprintf(stdout, "%s", BEGINSETUP);
+    fprintf(stdout, "mark\n");
+
+}   /* End of header */
+
+/*****************************************************************************/
+
+options()
+
+{
+
+    int		ch;			/* return value from getopt() */
+    int		n;			/* for CR and LF modes */
+
+/*
+ *
+ * Reads and processes the command line options. Added the -P option so arbitrary
+ * PostScript code can be passed through. Expect it could be useful for changing
+ * definitions in the prologue for which options have not been defined.
+ *
+ * Although any PostScript font can be used, things will only work for constant
+ * width fonts.
+ *
+ */
+
+    while ( (ch = getopt(argc, argv, optnames)) != EOF )  {
+	switch ( ch )  {
+	    case 'a':			/* aspect ratio */
+		    fprintf(stdout, "/aspectratio %s def\n", optarg);
+		    break;
+
+	    case 'c':			/* copies */
+		    copies = atoi(optarg);
+		    fprintf(stdout, "/#copies %s store\n", optarg);
+		    break;
+
+	    case 'f':			/* use this PostScript font */
+		    fontname = get_font(optarg);
+		    fprintf(stdout, "/font /%s def\n", fontname);
+		    break;
+
+	    case 'h':			/* default character spacing */
+		    ohmi = hmi = atoi(optarg) * HSCALE;
+		    fprintf(stdout, "/hmi %s def\n", optarg);
+		    break;
+
+	    case 'l':			/* lines per page */
+		    linespp = atoi(optarg);
+		    break;
+
+	    case 'm':			/* magnification */
+		    fprintf(stdout, "/magnification %s def\n", optarg);
+		    break;
+
+	    case 'n':			/* forms per page */
+		    formsperpage = atoi(optarg);
+		    fprintf(stdout, "%s %s\n", FORMSPERPAGE, optarg);
+		    fprintf(stdout, "/formsperpage %s def\n", optarg);
+		    break;
+
+	    case 'o':			/* output page list */
+		    out_list(optarg);
+		    break;
+
+	    case 'p':			/* landscape or portrait mode */
+		    if ( *optarg == 'l' )
+			fprintf(stdout, "/landscape true def\n");
+		    else fprintf(stdout, "/landscape false def\n");
+		    break;
+
+	    case 'r':			/* set CR and LF modes */
+		    n = atoi(optarg);
+		    if ( n & 01 )
+			lfiscr = ON;
+		    else lfiscr = OFF;
+		    if ( n & 02 )
+			crislf = ON;
+		    else crislf = OFF;
+		    break;
+
+	    case 's':			/* point size */
+		    fprintf(stdout, "/pointsize %s def\n", optarg);
+		    break;
+
+	    case 'v':			/* default line spacing */
+		    ovmi = vmi = atoi(optarg) * VSCALE;
+		    break;
+
+	    case 'x':			/* shift things horizontally */
+		    fprintf(stdout, "/xoffset %s def\n", optarg);
+		    break;
+
+	    case 'y':			/* and vertically on the page */
+		    fprintf(stdout, "/yoffset %s def\n", optarg);
+		    break;
+
+	    case 'A':			/* force job accounting */
+	    case 'J':
+		    if ( (fp_acct = fopen(optarg, "a")) == NULL )
+			error(FATAL, "can't open accounting file %s", optarg);
+		    break;
+
+	    case 'C':			/* copy file straight to output */
+		    if ( cat(optarg) == FALSE )
+			error(FATAL, "can't read %s", optarg);
+		    break;
+
+	    case 'E':			/* text font encoding */
+		    fontencoding = optarg;
+		    break;
+
+	    case 'L':			/* PostScript prologue file */
+		    prologue = optarg;
+		    break;
+
+	    case 'P':			/* PostScript pass through */
+		    fprintf(stdout, "%s\n", optarg);
+		    break;
+
+	    case 'R':			/* special global or page level request */
+		    saverequest(optarg);
+		    break;
+
+	    case 'D':			/* debug flag */
+		    debug = ON;
+		    break;
+
+	    case 'I':			/* ignore FATAL errors */
+		    ignore = ON;
+		    break;
+
+	    case '?':			/* don't understand the option */
+		    error(FATAL, "");
+		    break;
+
+	    default:			/* don't know what to do for ch */
+		    error(FATAL, "missing case for option %c\n", ch);
+		    break;
+	}   /* End switch */
+    }   /* End while */
+
+    argc -= optind;			/* get ready for non-option args */
+    argv += optind;
+
+}   /* End of options */
+
+/*****************************************************************************/
+
+char *get_font(name)
+
+    char	*name;			/* name the user asked for */
+
+{
+
+    int		i;			/* for looking through fontmap[] */
+
+/*
+ *
+ * Called from options() to map a user's font name into a legal PostScript name.
+ * If the lookup fails *name is returned to the caller. That should let you choose
+ * any PostScript font, although things will only work well for constant width
+ * fonts.
+ *
+ */
+
+    for ( i = 0; fontmap[i].name != NULL; i++ )
+	if ( strcmp(name, fontmap[i].name) == 0 )
+	    return(fontmap[i].val);
+
+    return(name);
+
+}   /* End of get_font */
+
+/*****************************************************************************/
+
+setup()
+
+{
+
+/*
+ *
+ * Handles things that must be done after the options are read but before the
+ * input files are processed.
+ *
+ */
+
+    writerequest(0, stdout);		/* global requests eg. manual feed */
+    setencoding(fontencoding);
+    fprintf(stdout, "setup\n");
+
+    if ( formsperpage > 1 )  {
+	if ( cat(formfile) == FALSE )
+	    error(FATAL, "can't read %s", formfile);
+	fprintf(stdout, "%d setupforms\n", formsperpage);
+    }	/* End if */
+
+    fprintf(stdout, "%s", ENDSETUP);
+
+}   /* End of setup */
+
+/*****************************************************************************/
+
+arguments()
+
+{
+
+/*
+ *
+ * Makes sure all the non-option command line arguments are processed. If we get
+ * here and there aren't any arguments left, or if '-' is one of the input files
+ * we'll process stdin.
+ *
+ */
+
+    fp_in = stdin;
+
+    if ( argc < 1 )
+	text();
+    else {				/* at least one argument is left */
+	while ( argc > 0 )  {
+	    if ( strcmp(*argv, "-") == 0 )
+		fp_in = stdin;
+	    else if ( (fp_in = fopen(*argv, "r")) == NULL )
+		error(FATAL, "can't open %s", *argv);
+	    text();
+	    if ( fp_in != stdin )
+		fclose(fp_in);
+	    argc--;
+	    argv++;
+	}   /* End while */
+    }   /* End else */
+
+}   /* End of arguments */
+
+/*****************************************************************************/
+
+done()
+
+{
+
+/*
+ *
+ * Finished with all the input files, so mark the end of the pages, make sure the
+ * last page is printed, and restore the initial environment.
+ *
+ */
+
+    fprintf(stdout, "%s", TRAILER);
+    fprintf(stdout, "done\n");
+    fprintf(stdout, "%s %s\n", DOCUMENTFONTS, fontname);
+    fprintf(stdout, "%s %d\n", PAGES, printed);
+
+}   /* End of done */
+
+/*****************************************************************************/
+
+account()
+
+{
+
+/*
+ *
+ * Writes an accounting record to *fp_acct provided it's not NULL. Accounting
+ * is requested using the -A or -J options.
+ *
+ */
+
+    if ( fp_acct != NULL )
+	fprintf(fp_acct, " print %d\n copies %d\n", printed, copies);
+
+}   /* End of account */
+
+/*****************************************************************************/
+
+text()
+
+{
+
+    int		ch;			/* next input character */
+
+/*
+ *
+ * Translates the next input file into PostScript. The redirect(-1) call forces
+ * the initial output to go to /dev/null - so the stuff formfeed() does at the
+ * end of each page doesn't go to stdout.
+ *
+ */
+
+    redirect(-1);			/* get ready for the first page */
+    formfeed();				/* force PAGE comment etc. */
+    inittabs();
+
+    while ( (ch = getc(fp_in)) != EOF )
+	switch ( ch )  {
+	    case '\010':		/* backspace */
+		    backspace();
+		    break;
+
+	    case '\011':		/* horizontal tab */
+		    htab();
+		    break;
+
+	    case '\012':		/* new line */
+		    linefeed();
+		    break;
+
+	    case '\013':		/* vertical tab */
+		    vtab();
+		    break;
+
+	    case '\014':		/* form feed */
+		    formfeed();
+		    break;
+
+	    case '\015':		/* carriage return */
+		    carriage();
+		    break;
+
+	    case '\016':		/* extended character set - SO */
+		    break;
+
+	    case '\017':		/* extended character set - SI */
+		    break;
+
+	    case '\031':		/* next char from supplementary set */
+		    break;
+
+	    case '\033':		/* 2 or 3 byte escape sequence */
+		    escape();
+		    break;
+
+	    default:
+		    oput(ch);
+		    break;
+	}   /* End switch */
+
+    formfeed();				/* next file starts on a new page? */
+
+}   /* End of text */
+
+/*****************************************************************************/
+
+inittabs()
+
+{
+
+    int		i;			/* loop index */
+
+/*
+ *
+ * Initializes the horizontal and vertical tab arrays. The way tabs are handled is
+ * quite inefficient and may not work for all initial hmi or vmi values.
+ *
+ */
+
+    for ( i = 0; i < COLUMNS; i++ )
+	htabstops[i] = ((i % 8) == 0) ? ON : OFF;
+
+    for ( i = 0; i < ROWS; i++ )
+	vtabstops[i] = ((i * ovmi) > BOTTOMMARGIN) ? ON : OFF;
+
+}   /* End of inittabs */
+
+/*****************************************************************************/
+
+cleartabs()
+
+{
+
+    int		i;			/* loop index */
+
+/*
+ *
+ * Clears all horizontal and vertical tab stops.
+ *
+ */
+
+    for ( i = 0; i < ROWS; i++ )
+	htabstops[i] = OFF;
+
+    for ( i = 0; i < COLUMNS; i++ )
+	vtabstops[i] = OFF;
+
+}   /* End of cleartabs */
+
+/*****************************************************************************/
+
+formfeed()
+
+{
+
+/*
+ *
+ * Called whenever we've finished with the last page and want to get ready for the
+ * next one. Also used at the beginning and end of each input file, so we have to
+ * be careful about what's done. I've added a simple test before the showpage that
+ * should eliminate the extra blank page that was put out at the end of many jobs,
+ * but the PAGES comments may be wrong.
+ *
+ */
+
+    if ( fp_out == stdout )		/* count the last page */
+	printed++;
+
+    endline();				/* print the last line */
+
+    fprintf(fp_out, "cleartomark\n");
+    if ( feof(fp_in) == 0 || markedpage == TRUE )
+	fprintf(fp_out, "showpage\n");
+    fprintf(fp_out, "saveobj restore\n");
+    fprintf(fp_out, "%s %d %d\n", ENDPAGE, page, printed);
+
+    if ( ungetc(getc(fp_in), fp_in) == EOF )
+	redirect(-1);
+    else redirect(++page);
+
+    fprintf(fp_out, "%s %d %d\n", PAGE, page, printed+1);
+    fprintf(fp_out, "/saveobj save def\n");
+    fprintf(fp_out, "mark\n");
+    writerequest(printed+1, fp_out);
+    fprintf(fp_out, "%d pagesetup\n", printed+1);
+
+    vgoto(topmargin);
+    hgoto(leftmargin);
+
+    markedpage = FALSE;
+
+}   /* End of formfeed */
+
+/*****************************************************************************/
+
+linefeed()
+
+{
+
+    int		line = 0;		/* current line - based on ovmi */
+
+/*
+ *
+ * Adjust our current vertical position. If we've passed the bottom of the page
+ * or exceeded the number of lines per page, print it and go to the upper left
+ * corner of the next page. This routine is also called from carriage() if crislf
+ * is ON.
+ *
+ */
+
+    vmot(vmi);
+
+    if ( lfiscr == ON )
+	hgoto(leftmargin);
+
+    if ( linespp > 0 )			/* means something so see where we are */
+	line = vpos / ovmi + 1;
+
+    if ( vpos > bottommargin || line > linespp )
+	formfeed();
+
+}   /* End of linefeed */
+
+/*****************************************************************************/
+
+carriage()
+
+{
+
+/*
+ *
+ * Handles carriage return character. If crislf is ON we'll generate a line feed
+ * every time we get a carriage return character.
+ *
+ */
+
+    if ( shadowprint == ON )		/* back to normal mode */
+	changefont(fontname);
+
+    advance = 1;
+    shadowprint = OFF;
+
+    hgoto(leftmargin);
+
+    if ( crislf == ON )
+	linefeed();
+
+}   /* End of carriage */
+
+/*****************************************************************************/
+
+htab()
+
+{
+
+    int		col;			/* 'column' we'll be at next */
+    int		i;			/* loop index */
+
+/*
+ *
+ * Tries to figure out where the next tab stop is. Wasn't positive about this
+ * one, since hmi can change. I'll assume columns are determined by the original
+ * value of hmi. That fixes them on the page, which seems to make more sense than
+ * letting them float all over the place.
+ *
+ */
+
+    endline();
+
+    col = hpos/ohmi + 1;
+    for ( i = col; i < ROWS; i++ )
+	if ( htabstops[i] == ON )  {
+	    col = i;
+	    break;
+	}   /* End if */
+
+    hgoto(col * ohmi);
+    lastx = hpos;
+
+}   /* End of htab */
+
+/*****************************************************************************/
+
+vtab()
+
+{
+
+    int		line;			/* line we'll be at next */
+    int		i;			/* loop index */
+
+/*
+ *
+ * Looks for the next vertical tab stop in the vtabstops[] array and moves to that
+ * line. If we don't find a tab we'll just move down one line - shouldn't happen.
+ *
+ */
+
+    endline();
+
+    line = vpos/ovmi + 1;
+    for ( i = line; i < COLUMNS; i++ )
+	if ( vtabstops[i] == ON )  {
+	    line = i;
+	    break;
+	}   /* End if */
+
+    vgoto(line * ovmi);
+
+}   /* End of vtab */
+
+/*****************************************************************************/
+
+backspace()
+
+{
+
+/*
+ *
+ * Moves backwards a distance equal to the current value of hmi, but don't go
+ * past the left margin.
+ *
+ */
+
+    endline();
+
+    if ( hpos - leftmargin >= hmi )
+	hmot(-hmi);
+    else hgoto(leftmargin);		/* maybe just ignore the backspace?? */
+
+    lastx = hpos;
+
+}   /* End of backspace */
+
+/*****************************************************************************/
+
+escape()
+
+{
+
+    int		ch;			/* control character */
+
+/*
+ *
+ * Handles special codes that are expected to follow an escape character. The
+ * initial escape character is followed by one or two bytes.
+ *
+ */
+
+    switch ( ch = getc(fp_in) ) {
+	case 'T':			/* top margin */
+		topmargin = vpos;
+		break;
+
+	case 'L':			/* bottom margin */
+		bottommargin = vpos;
+		break;
+
+	case 'C':			/* clear top and bottom margins */
+		bottommargin = BOTTOMMARGIN;
+		topmargin = TOPMARGIN;
+		break;
+
+	case '9':			/* left margin */
+		leftmargin = hpos;
+		break;
+
+	case '0':			/* right margin */
+		rightmargin = hpos;
+		break;
+
+	case '1':			/* set horizontal tab */
+		htabstops[hpos/ohmi] = ON;
+		break;
+
+	case '8':			/* clear horizontal tab at hpos */
+		htabstops[hpos/ohmi] = OFF;
+		break;
+
+	case '-':			/* set vertical tab */
+		vtabstops[vpos/ovmi] = ON;
+		break;
+
+	case '2':			/* clear all tabs */
+		cleartabs();
+		break;
+
+	case '\014':			/* set lines per page */
+		linespp = getc(fp_in);
+		break;
+
+	case '\037':			/* set hmi to next byte minus 1 */
+		hmi = HSCALE * (getc(fp_in) - 1);
+		break;
+
+	case 'S':			/* reset hmi to default */
+		hmi = ohmi;
+		break;
+
+	case '\011':			/* move to column given by next byte */
+		hgoto((getc(fp_in)-1) * ohmi);
+		break;
+
+	case '?':			/* do carriage return after line feed */
+		lfiscr = ON;
+		break;
+
+	case '!':			/* don't generate carriage return */
+		lfiscr = OFF;
+		break;
+
+	case '5':			/* forward print mode */
+		advance = 1;
+		break;
+
+	case '6':			/* backward print mode */
+		advance = -1;
+		break;
+
+	case '\036':			/* set vmi to next byte minus 1 */
+		vmi = VSCALE * (getc(fp_in) - 1);
+		break;
+
+	case '\013':			/* move to line given by next byte */
+		vgoto((getc(fp_in)-1) * ovmi);
+		break;
+
+	case 'U':			/* positive half line feed */
+		vmot(vmi/2);
+		break;
+
+	case 'D':			/* negative half line feed */
+		vmot(-vmi/2);
+		break;
+
+	case '\012':			/* negative line feed */
+		vmot(-vmi);
+		break;
+
+	case '\015':			/* clear all margins */
+		bottommargin = BOTTOMMARGIN;
+		topmargin = TOPMARGIN;
+		leftmargin = BOTTOMMARGIN;
+		rightmargin = RIGHTMARGIN;
+		break;
+
+	case 'E':			/* auto underscore - use italic font */
+		changefont("/Courier-Oblique");
+		break;
+
+	case 'R':			/* disable auto underscore */
+		changefont(fontname);
+		break;
+
+	case 'O':			/* bold/shadow printing */
+	case 'W':
+		changefont("/Courier-Bold");
+		shadowprint = ON;
+		break;
+
+	case '&':			/* disable bold printing */
+		changefont(fontname);
+		shadowprint = OFF;
+		break;
+
+	case '/':			/* ignored 2 byte escapes */
+	case '\\':
+	case '<':
+	case '>':
+	case '%':
+	case '=':
+	case '.':
+	case '4':
+	case 'A':
+	case 'B':
+	case 'M':
+	case 'N':
+	case 'P':
+	case 'Q':
+	case 'X':
+	case '\010':
+		break;
+
+	case ',':			/* ignored 3 byte escapes */
+	case '\016':
+	case '\021':
+		getc(fp_in);
+		break;
+
+	case '3':			/* graphics mode - should quit! */
+	case '7':
+	case 'G':
+	case 'V':
+	case 'Y':
+	case 'Z':
+		error(FATAL, "graphics mode is not implemented");
+		break;
+
+	default:
+		error(FATAL, "missing case for escape o%o\n", ch);
+		break;
+    }	/* End switch */
+
+}   /* End of escape */
+
+/*****************************************************************************/
+
+vmot(n)
+
+    int		n;			/* move this far vertically */
+
+{
+
+/*
+ *
+ * Move vertically n units from where we are.
+ *
+ */
+
+    vpos += n;
+
+}   /* End of vmot */
+
+/*****************************************************************************/
+
+vgoto(n)
+
+    int		n;			/* new vertical position */
+
+{
+
+/*
+ *
+ * Moves to absolute vertical position n.
+ *
+ */
+
+    vpos = n;
+
+}   /* End of vgoto */
+
+/*****************************************************************************/
+
+hmot(n)
+
+    int		n;			/* move this horizontally */
+
+{
+
+/*
+ *
+ * Moves horizontally n units from our current position.
+ *
+ */
+
+    hpos += n * advance;
+
+    if ( hpos < leftmargin )
+	hpos = leftmargin;
+
+}   /* End of hmot */
+
+/*****************************************************************************/
+
+hgoto(n)
+
+    int		n;			/* go to this horizontal position */
+
+{
+
+/*
+ *
+ * Moves to absolute horizontal position n.
+ *
+ */
+
+    hpos = n;
+
+}   /* End of hgoto */
+
+/*****************************************************************************/
+
+changefont(name)
+
+    char	*name;
+
+{
+
+/*
+ *
+ * Changes the current font. Used to get in and out of auto underscore and bold
+ * printing.
+ *
+ */
+
+    endline();
+    fprintf(fp_out, "%s f\n", name);
+
+}   /* End of changefont */
+
+/*****************************************************************************/
+
+startline()
+
+{
+
+/*
+ *
+ * Called whenever we want to be certain we're ready to start pushing characters
+ * into an open string on the stack. If stringcount is positive we've already
+ * started, so there's nothing to do. The first string starts in column 1.
+ *
+ */
+
+    if ( stringcount < 1 )  {
+	putc('(', fp_out);
+	stringstart = lastx = hpos;
+	lasty = vpos;
+	lasthmi = hmi;
+	lastc = -1;
+	prevx = -1;
+	stringcount = 1;
+    }	/* End if */
+
+}   /* End of startline */
+
+/*****************************************************************************/
+
+endline()
+
+{
+
+/*
+ *
+ * Generates a call to the PostScript procedure that processes the text on the
+ * the stack - provided stringcount is positive.
+ *
+ */
+
+    if ( stringcount > 0 )
+	fprintf(fp_out, ")%d %d %d t\n", stringstart, lasty, lasthmi);
+
+    stringcount = 0;
+
+}   /* End of endline */
+
+/*****************************************************************************/
+
+endstring()
+
+{
+
+/*
+ *
+ * Takes the string we've been working on and adds it to the output file. Called
+ * when we need to adjust our horizontal position before starting a new string.
+ * Also called from endline() when we're done with the current line.
+ *
+ */
+
+    if ( stringcount > 0 )  {
+	fprintf(fp_out, ")%d(", stringstart);
+	lastx = stringstart = hpos;
+	stringcount++;
+    }	/* End if */
+
+}   /* End of endstring */
+
+/*****************************************************************************/
+
+oput(ch)
+
+    int		ch;			/* next output character */
+
+{
+
+/*
+ *
+ * Responsible for adding all printing characters from the input file to the
+ * open string on top of the stack. The only other characters that end up in
+ * that string are the quotes required for special characters. Reverse printing
+ * mode hasn't been tested but it should be close. hpos and lastx should disagree
+ * each time (except after startline() does something), and that should force a
+ * call to endstring() for every character.
+ *
+ */
+
+    if ( stringcount > 100 )		/* don't put too much on the stack */
+	endline();
+
+    if ( vpos != lasty )
+	endline();
+
+    if ( advance == -1 )		/* for reverse printing - move first */
+	hmot(hmi);
+
+    startline();
+
+    if ( lastc != ch || hpos != prevx )  {
+	if ( lastx != hpos )
+	    endstring();
+
+	if ( isascii(ch) && isprint(ch) ) {
+	    if ( ch == '\\' || ch == '(' || ch == ')' )
+		putc('\\', fp_out);
+	    putc(ch, fp_out);
+	} else fprintf(fp_out, "\\%.3o", ch & 0377);
+
+	lastc = ch;
+	prevx = hpos;
+	lastx += lasthmi;
+    }	/* End if */
+
+    if ( advance != -1 )
+	hmot(hmi);
+
+    markedpage = TRUE;
+
+}   /* End of oput */
+
+/*****************************************************************************/
+
+redirect(pg)
+
+    int		pg;			/* next page we're printing */
+
+{
+
+    static FILE	*fp_null = NULL;	/* if output is turned off */
+
+/*
+ *
+ * If we're not supposed to print page pg, fp_out will be directed to /dev/null,
+ * otherwise output goes to stdout.
+ *
+ */
+
+    if ( pg >= 0 && in_olist(pg) == ON )
+	fp_out = stdout;
+    else if ( (fp_out = fp_null) == NULL )
+	fp_out = fp_null = fopen("/dev/null", "w");
+
+}   /* End of redirect */
+
+/*****************************************************************************/
+