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#include <u.h>
#include <libc.h>
#include <ctype.h>
#include <bio.h>
#include <comments.h>
#include <path.h>

#define UNKNOWNCHAR     "/sys/lib/postscript/prologues/pjw.char.ps"

char    *optnames = "a:c:f:l:m:n:o:p:s:t:x:y:P:";

double  aspectratio = 1.0;
Biobuf  inbuf, outbuf;
Biobuf  *bin, *bout;
int     char_no = 0;            /* character to be done on a line */
int     copies = 1;
int     formsperpage = 1;
int     in_string;              /* flag: we are inside a Postscript string */
int     landscape = 0;
int     line_no = 0;            /* line number on a page */
int     linesperpage = 66;
double  magnification = 1.0;
int     page_no = 0;            /* page number in a document */
int     pages_printed;
char    *passthrough = 0;
int     pointsize = 10;
int     spaces = 0;
int     tabs = 0;
double  xoffset = .25;
double  yoffset = .25;

static int pplistmaxsize = 0;

uchar *pplist = 0;              /* bitmap list for storing pages to print */

struct strtab {
        int     size;
        char    *str;
        int     used;
};

struct strtab charcode[256] = {
        {4, "\\000"}, {4, "\\001"}, {4, "\\002"}, {4, "\\003"},
        {4, "\\004"}, {4, "\\005"}, {4, "\\006"}, {4, "\\007"},
        {4, "\\010"}, {4, "\\011"}, {4, "\\012"}, {4, "\\013"},
        {4, "\\014"}, {4, "\\015"}, {4, "\\016"}, {4, "\\017"},
        {4, "\\020"}, {4, "\\021"}, {4, "\\022"}, {4, "\\023"},
        {4, "\\024"}, {4, "\\025"}, {4, "\\026"}, {4, "\\027"},
        {4, "\\030"}, {4, "\\031"}, {4, "\\032"}, {4, "\\033"},
        {4, "\\034"}, {4, "\\035"}, {4, "\\036"}, {4, "\\037"},
        {1, " "}, {1, "!"}, {1, "\""}, {1, "#"},
        {1, "$"}, {1, "%"}, {1, "&"}, {1, "'"},
        {2, "\\("}, {2, "\\)"}, {1, "*"}, {1, "+"},
        {1, ","}, {1, "-"}, {1, "."}, {1, "/"},
        {1, "0"}, {1, "1"}, {1, "2"}, {1, "3"},
        {1, "4"}, {1, "5"}, {1, "6"}, {1, "7"},
        {1, "8"}, {1, "9"}, {1, ":"}, {1, ";"},
        {1, "<"}, {1, "="}, {1, ">"}, {1, "?"},
        {1, "@"}, {1, "A"}, {1, "B"}, {1, "C"},
        {1, "D"}, {1, "E"}, {1, "F"}, {1, "G"},
        {1, "H"}, {1, "I"}, {1, "J"}, {1, "K"},
        {1, "L"}, {1, "M"}, {1, "N"}, {1, "O"},
        {1, "P"}, {1, "Q"}, {1, "R"}, {1, "S"},
        {1, "T"}, {1, "U"}, {1, "V"}, {1, "W"},
        {1, "X"}, {1, "Y"}, {1, "Z"}, {1, "["},
        {2, "\\\\"}, {1, "]"}, {1, "^"}, {1, "_"},
        {1, "`"}, {1, "a"}, {1, "b"}, {1, "c"},
        {1, "d"}, {1, "e"}, {1, "f"}, {1, "g"},
        {1, "h"}, {1, "i"}, {1, "j"}, {1, "k"},
        {1, "l"}, {1, "m"}, {1, "n"}, {1, "o"},
        {1, "p"}, {1, "q"}, {1, "r"}, {1, "s"},
        {1, "t"}, {1, "u"}, {1, "v"}, {1, "w"},
        {1, "x"}, {1, "y"}, {1, "z"}, {1, "{"},
        {1, "|"}, {1, "}"}, {1, "~"}, {4, "\\177"},
        {4, "\\200"}, {4, "\\201"}, {4, "\\202"}, {4, "\\203"},
        {4, "\\204"}, {4, "\\205"}, {4, "\\206"}, {4, "\\207"},
        {4, "\\210"}, {4, "\\211"}, {4, "\\212"}, {4, "\\213"},
        {4, "\\214"}, {4, "\\215"}, {4, "\\216"}, {4, "\\217"},
        {4, "\\220"}, {4, "\\221"}, {4, "\\222"}, {4, "\\223"},
        {4, "\\224"}, {4, "\\225"}, {4, "\\226"}, {4, "\\227"},
        {4, "\\230"}, {4, "\\231"}, {4, "\\232"}, {4, "\\233"},
        {4, "\\234"}, {4, "\\235"}, {4, "\\236"}, {4, "\\237"},
        {4, "\\240"}, {4, "\\241"}, {4, "\\242"}, {4, "\\243"},
        {4, "\\244"}, {4, "\\245"}, {4, "\\246"}, {4, "\\247"},
        {4, "\\250"}, {4, "\\251"}, {4, "\\252"}, {4, "\\253"},
        {4, "\\254"}, {4, "\\255"}, {4, "\\256"}, {4, "\\257"},
        {4, "\\260"}, {4, "\\261"}, {4, "\\262"}, {4, "\\263"},
        {4, "\\264"}, {4, "\\265"}, {4, "\\266"}, {4, "\\267"},
        {4, "\\270"}, {4, "\\271"}, {4, "\\272"}, {4, "\\273"},
        {4, "\\274"}, {4, "\\275"}, {4, "\\276"}, {4, "\\277"},
        {4, "\\300"}, {4, "\\301"}, {4, "\\302"}, {4, "\\303"},
        {4, "\\304"}, {4, "\\305"}, {4, "\\306"}, {4, "\\307"},
        {4, "\\310"}, {4, "\\311"}, {4, "\\312"}, {4, "\\313"},
        {4, "\\314"}, {4, "\\315"}, {4, "\\316"}, {4, "\\317"},
        {4, "\\320"}, {4, "\\321"}, {4, "\\322"}, {4, "\\323"},
        {4, "\\324"}, {4, "\\325"}, {4, "\\326"}, {4, "\\327"},
        {4, "\\330"}, {4, "\\331"}, {4, "\\332"}, {4, "\\333"},
        {4, "\\334"}, {4, "\\335"}, {4, "\\336"}, {4, "\\337"},
        {4, "\\340"}, {4, "\\341"}, {4, "\\342"}, {4, "\\343"},
        {4, "\\344"}, {4, "\\345"}, {4, "\\346"}, {4, "\\347"},
        {4, "\\350"}, {4, "\\351"}, {4, "\\352"}, {4, "\\353"},
        {4, "\\354"}, {4, "\\355"}, {4, "\\356"}, {4, "\\357"},
        {4, "\\360"}, {4, "\\361"}, {4, "\\362"}, {4, "\\363"},
        {4, "\\364"}, {4, "\\365"}, {4, "\\366"}, {4, "\\367"},
        {4, "\\370"}, {4, "\\371"}, {4, "\\372"}, {4, "\\373"},
        {4, "\\374"}, {4, "\\375"}, {4, "\\376"}, {4, "\\377"}
};

#define FONTABSIZE 0x27

struct strtab fontname[FONTABSIZE] = {
        {19, "LucidaSansUnicode00", 0},
        {19, "LucidaSansUnicode01", 0},
        {19, "LucidaSansUnicode02", 0},
        {19, "LucidaSansUnicode03", 0},
        {19, "LucidaSansUnicode04", 0},
        {19, "LucidaSansUnicode05", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {0, "", 0},
        {19, "LucidaSansUnicode20", 0},
        {19, "LucidaSansUnicode21", 0},
        {19, "LucidaSansUnicode22", 0},
        {0, "", 0},
        {19, "LucidaSansUnicode24", 0},
        {19, "LucidaSansUnicode25", 0},
        {7, "Courier", 0}
};

/* This was taken from postprint */

int
cat(char *filename) {
        int n;
        char buf[Bsize];
        Biobuf *bfile;

        if ((bfile = Bopen(filename, OREAD)) == nil)
                return(1);
        while ((n = Bread(bfile, buf, Bsize)) > 0)
                if (Bwrite(bout, buf, n) != n)
                        break;
        Bterm(bfile);
        if (n != 0)
                return(1);
        return(0);
}

void
prologues(void) {
        char *ts;
        int tabstop;

        Bprint(bout, "%s", CONFORMING);
        Bprint(bout, "%s %s\n", VERSION, PROGRAMVERSION);
        Bprint(bout, "%s %s\n", DOCUMENTFONTS, ATEND);
        Bprint(bout, "%s %s\n", PAGES, ATEND);
        Bprint(bout, "%s", ENDCOMMENTS);

        if (cat(POSTPRINT))
                sysfatal("can't read %s: %r", POSTPRINT);

        if (DOROUND)
                cat(ROUNDPAGE);

        tabstop = 0;
        ts = getenv("tabstop");
        if(ts != nil)
                tabstop = strtol(ts, nil, 0);
        if(tabstop == 0)
                tabstop = 8;
        Bprint(bout, "/f {findfont pointsize scalefont setfont} bind def\n");
        Bprint(bout, "/tabwidth /Courier f (");
        while(tabstop--)
                Bputc(bout, 'n');
        Bprint(bout, ") stringwidth pop def\n");
        Bprint(bout, "/tab {tabwidth 0 ne {currentpoint 3 1 roll exch tabwidth mul add tabwidth\n");
        Bprint(bout, "\tdiv truncate tabwidth mul exch moveto} if} bind def\n");
        Bprint(bout, "/spacewidth /%s f ( ) stringwidth pop def\n", fontname[0].str);
        Bprint(bout, "/sp {spacewidth mul 0 rmoveto} bind def\n");
        Bprint(bout, "%s", ENDPROLOG);
        Bprint(bout, "%s", BEGINSETUP);
        Bprint(bout, "mark\n");

        if (formsperpage > 1) {
                Bprint(bout, "%s %d\n", FORMSPERPAGE, formsperpage);
                Bprint(bout, "/formsperpage %d def\n", formsperpage);
        }
        if (aspectratio != 1) Bprint(bout, "/aspectratio %g def\n", aspectratio);
        if (copies != 1) Bprint(bout, "/#copies %d store\n", copies);
        if (landscape) Bprint(bout, "/landscape true def\n");
        if (magnification != 1) Bprint(bout, "/magnification %g def\n", magnification);
        if (pointsize != 10) Bprint(bout, "/pointsize %d def\n", pointsize);
        if (xoffset != .25) Bprint(bout, "/xoffset %g def\n", xoffset);
        if (yoffset != .25) Bprint(bout, "/yoffset %g def\n", yoffset);
        cat(ENCODINGDIR"/Latin1.enc");
        if (passthrough != 0) Bprint(bout, "%s\n", passthrough);
        Bprint(bout, "setup\n");
        if (formsperpage > 1) {
                cat(FORMFILE);
                Bprint(bout, "%d setupforms \n", formsperpage);
        }
        if (cat(UNKNOWNCHAR))
                fprint(2, "cannot open %s: %r\n", UNKNOWNCHAR);
        Bprint(bout, "%s", ENDSETUP);
}

int
pageon(void) {
        if (pplist == 0 && page_no != 0)
                return(1);      /* no page list, print all pages */
        if (page_no/8 < pplistmaxsize && (pplist[page_no/8] & 1<<(page_no%8)))
                return(1);
        else
                return(0);
}

void
startpage(void) {
        ++char_no;
        ++line_no;
        ++page_no;
        if (pageon()) {
                ++pages_printed;
                Bprint(bout, "%s %d %d\n", PAGE, page_no, pages_printed);
                Bprint(bout, "/saveobj save def\n");
                Bprint(bout, "mark\n");
                Bprint(bout, "%d pagesetup\n", pages_printed);
        }
}

void
endpage(void) {
        line_no = 0;
        char_no = 0;
        if (pageon()) {
                Bprint(bout, "cleartomark\n");
                Bprint(bout, "showpage\n");
                Bprint(bout, "saveobj restore\n");
                Bprint(bout, "%s %d %d\n", ENDPAGE, page_no, pages_printed);
        }
}

void
startstring(void) {
        if (!in_string) {
                if (pageon()) Bprint(bout, "(");
                in_string = 1;
        }
}

void
endstring(void) {
        if (in_string) {
                if (pageon()) Bprint(bout, ") show ");
                in_string = 0;
        }
}

void
prspace(void) {
        if (spaces) {
                endstring();
                if (pageon()) Bprint(bout, "%d sp ", spaces);
                spaces = 0;
        }
}

void
prtab(void) {
        if (tabs) {
                endstring();
                if (pageon()) Bprint(bout, "%d tab ", tabs);
                tabs = 0;
        }
}

void
txt2post(void) {
        int lastfont = -1;
        int lastchar = -1;
        int thisfont, thischar;
        long r;

        in_string = 0;
        char_no = 0;
        line_no = 0;
        page_no = 0;
        spaces = 0;
        fontname[0].used++;
        while ((r = Bgetrune(bin)) >= 0) {
                thischar = r & 0xff;
                thisfont = (r>>8) & 0xff;

                if (line_no == 0 && char_no == 0)
                        startpage();

                if (line_no == 1 && char_no == 1) {
                        if (pageon()) Bprint(bout, " /%s f\n", fontname[thisfont].str);
                        lastfont = thisfont;
                }

                switch (r) {
                case ' ':
                        prtab();
                        if (lastfont > 0) {
                                spaces++;
                                continue;
                        }
                        break;
                case '\n':
                case '\f':
                        startstring();
                        if (pageon()) Bprint(bout, ")l\n");
                        char_no = 1;
                        in_string = 0;
                        spaces = 0;
                        tabs = 0;
                        if (++line_no > linesperpage || r == '\f')
                                endpage();
                        lastchar = -1;
                        continue;
                case '\t':
                        prspace();
                        tabs++;
                        char_no++;
                        lastchar = -1;
                        continue;
                case '\b':
                        /* just toss out backspaces for now */
                        if (lastchar != -1) {
                                endstring();
                                if (pageon()) Bprint(bout, "(%s) stringwidth pop neg 0 rmoveto ", charcode[lastchar].str);
                        }
                        char_no++;
                        lastchar = -1;
                        continue;
                }

                /* do something if font is out of table range */
                if (thisfont>=FONTABSIZE || fontname[thisfont].size == 0) {
                        prspace();
                        prtab();
                        endstring();
                        Bprint(bout, "pw ");
                        char_no++;
                        lastchar = -1;
                        continue;
                }

                if (thisfont != lastfont) {
                        endstring();
                        if (pageon()) {
                                Bprint(bout, "/%s f\n", fontname[thisfont].str);
                        }
                        fontname[thisfont].used++;
                }
                prspace();
                prtab();
                startstring();
                if (pageon()) Bprint(bout, "%s", charcode[thischar].str);
/*              if (pageon()) Bprint(bout, "%2.2x", thischar); /* try hex strings*/
                char_no++;
                lastchar = thischar;
                lastfont = thisfont;
        }
        if (line_no != 0 || char_no != 0) {
                if (char_no != 1) {
                        fprint(2, "premature EOF: newline appended\n");
                        startstring();
                        if (pageon()) Bprint(bout, ")l\n");
                }
                endpage();
        }
}

void
pagelist(char *list) {
        char c;
        int n, state, start;
        unsigned m;

        if (list == 0)
                return;
        start = 0;
        state = 1;
        while ((c=*list) != '\0') {
                n = 0;
                while (isdigit(c)) {
                        n = n * 10 + c - '0';
                        c = *++list;
                }
                switch (state) {
                case 1:
                        start = n;
                        /* fall through */
                case 2:
                        if (n/8+1 > pplistmaxsize) {
                                pplistmaxsize = n/8+1;
                                if ((pplist = realloc(pplist, n/8+1)) == 0)
                                        sysfatal("malloc");
                        }
                        for (m=start; m<=n; m++)
                                pplist[m/8] |= 1<<(m%8);
                        break;
                }
                switch (c) {
                case '-':
                        state = 2;
                        list++;
                        break;
                case ',':
                        state = 1;
                        list++;
                        break;
                case '\0':
                        break;
                }
        }
}

void
finish(void) {
        int i;

        Bprint(bout, "%s", TRAILER);
        Bprint(bout, "done\n");
        Bprint(bout, "%s", DOCUMENTFONTS);

        for (i=0; i<FONTABSIZE; i++)
                if (fontname[i].used)
                        Bprint(bout, " %s", fontname[i].str);
        Bprint(bout, "\n");

        Bprint(bout, "%s %d\n", PAGES, pages_printed);
}

void
main(int argc, char *argv[]) {
        int i;
        char *t;

        bin = &inbuf;
        bout = &outbuf;
        if (Binit(bout, 1, OWRITE) == Beof)
                sysfatal("Binit");

        ARGBEGIN{
        case 'a':                       /* aspect ratio */
                aspectratio = atof(ARGF());
                break;
        case 'c':                       /* copies */
                copies = atoi(ARGF());
                break;
        case 'f':                       /* primary font, for now */
                t = ARGF();
                fontname[0].str = malloc(strlen(t)+1);
                strcpy(fontname[0].str, t);
                break;
        case 'l':                       /* lines per page */
                linesperpage = atoi(ARGF());
                break;
        case 'm':                       /* magnification */
                magnification = atof(ARGF());
                break;
        case 'n':                       /* forms per page */
                formsperpage = atoi(ARGF());
                break;
        case 'o':                       /* output page list */
                pagelist(ARGF());
                break;
        case 'p':                       /* landscape or portrait mode */
                if ( ARGF()[0] == 'l' )
                        landscape = 1;
                else
                        landscape = 0;
                break;
        case 's':                       /* point size */
                pointsize = atoi(ARGF());
                break;
        case 'x':                       /* shift things horizontally */
                xoffset = atof(ARGF());
                break;

        case 'y':                       /* and vertically on the page */
                yoffset = atof(ARGF());
                break;
        case 'P':                       /* PostScript pass through */
                t = ARGF();
                i = strlen(t) + 1;
                passthrough = malloc(i);
                if (passthrough == 0)
                        sysfatal("malloc");
                strncpy(passthrough, t, i);
                break;
        default:
                fprint(2, "unknown option %C\n", ARGC());
                break;
        }ARGEND;

        prologues();
        if (argc <= 0) {
                if (Binit(bin, 0, OREAD) == Beof)
                        sysfatal("cannot Binit stdin");
                txt2post();
        }
        for (i=0; i<argc; i++) {
                bin = Bopen(argv[i], OREAD);
                if (bin == nil) {
                        fprint(2, "cannot open %s: %r\n", argv[i]);
                        continue;
                }
                txt2post();
                Bterm(bin);
        }
        finish();
        exits("");
}