1// -*- C++ -*-
2/* Copyright (C) 1989, 1990, 1991, 1992, 2000, 2001, 2002, 2003, 2004
3   Free Software Foundation, Inc.
4     Written by James Clark (jjc@jclark.com)
5
6This file is part of groff.
7
8groff is free software; you can redistribute it and/or modify it under
9the terms of the GNU General Public License as published by the Free
10Software Foundation; either version 2, or (at your option) any later
11version.
12
13groff is distributed in the hope that it will be useful, but WITHOUT ANY
14WARRANTY; without even the implied warranty of MERCHANTABILITY or
15FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
16for more details.
17
18You should have received a copy of the GNU General Public License along
19with groff; see the file COPYING.  If not, write to the Free Software
20Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
21
22/*
23 * PostScript documentation:
24 *   http://www.adobe.com/products/postscript/pdfs/PLRM.pdf
25 *   http://partners.adobe.com/asn/developer/pdfs/tn/5001.DSC_Spec.pdf
26 */
27
28#include "driver.h"
29#include "stringclass.h"
30#include "cset.h"
31#include "nonposix.h"
32#include "paper.h"
33
34#include "ps.h"
35#include <time.h>
36
37#ifdef NEED_DECLARATION_PUTENV
38extern "C" {
39  int putenv(const char *);
40}
41#endif /* NEED_DECLARATION_PUTENV */
42
43extern "C" const char *Version_string;
44
45// search path defaults to the current directory
46search_path include_search_path(0, 0, 0, 1);
47
48static int landscape_flag = 0;
49static int manual_feed_flag = 0;
50static int ncopies = 1;
51static int linewidth = -1;
52// Non-zero means generate PostScript code that guesses the paper
53// length using the imageable area.
54static int guess_flag = 0;
55static double user_paper_length = 0;
56static double user_paper_width = 0;
57
58// Non-zero if -b was specified on the command line.
59static int bflag = 0;
60unsigned broken_flags = 0;
61
62// Non-zero means we need the CMYK extension for PostScript Level 1
63static int cmyk_flag = 0;
64
65#define DEFAULT_LINEWIDTH 40	/* in ems/1000 */
66#define MAX_LINE_LENGTH 72
67#define FILL_MAX 1000
68
69const char *const dict_name = "grops";
70const char *const defs_dict_name = "DEFS";
71const int DEFS_DICT_SPARE = 50;
72
73double degrees(double r)
74{
75  return r*180.0/PI;
76}
77
78double radians(double d)
79{
80  return d*PI/180.0;
81}
82
83// This is used for testing whether a character should be output in the
84// PostScript file using \nnn, so we really want the character to be
85// less than 0200.
86
87inline int is_ascii(char c)
88{
89  return (unsigned char)c < 0200;
90}
91
92ps_output::ps_output(FILE *f, int n)
93: fp(f), col(0), max_line_length(n), need_space(0), fixed_point(0)
94{
95}
96
97ps_output &ps_output::set_file(FILE *f)
98{
99  fp = f;
100  col = 0;
101  return *this;
102}
103
104ps_output &ps_output::copy_file(FILE *infp)
105{
106  int c;
107  while ((c = getc(infp)) != EOF)
108    putc(c, fp);
109  return *this;
110}
111
112ps_output &ps_output::end_line()
113{
114  if (col != 0) {
115    putc('\n', fp);
116    col = 0;
117    need_space = 0;
118  }
119  return *this;
120}
121
122ps_output &ps_output::special(const char *s)
123{
124  if (s == 0 || *s == '\0')
125    return *this;
126  if (col != 0) {
127    putc('\n', fp);
128    col = 0;
129  }
130  fputs(s, fp);
131  if (strchr(s, '\0')[-1] != '\n')
132    putc('\n', fp);
133  need_space = 0;
134  return *this;
135}
136
137ps_output &ps_output::simple_comment(const char *s)
138{
139  if (col != 0)
140    putc('\n', fp);
141  putc('%', fp);
142  putc('%', fp);
143  fputs(s, fp);
144  putc('\n', fp);
145  col = 0;
146  need_space = 0;
147  return *this;
148}
149
150ps_output &ps_output::begin_comment(const char *s)
151{
152  if (col != 0)
153    putc('\n', fp);
154  putc('%', fp);
155  putc('%', fp);
156  fputs(s, fp);
157  col = 2 + strlen(s);
158  return *this;
159}
160
161ps_output &ps_output::end_comment()
162{
163  if (col != 0) {
164    putc('\n', fp);
165    col = 0;
166  }
167  need_space = 0;
168  return *this;
169}
170
171ps_output &ps_output::comment_arg(const char *s)
172{
173  int len = strlen(s);
174  if (col + len + 1 > max_line_length) {
175    putc('\n', fp);
176    fputs("%%+", fp);
177    col = 3;
178  }
179  putc(' ',  fp);
180  fputs(s, fp);
181  col += len + 1;
182  return *this;
183}
184
185ps_output &ps_output::set_fixed_point(int n)
186{
187  assert(n >= 0 && n <= 10);
188  fixed_point = n;
189  return *this;
190}
191
192ps_output &ps_output::put_delimiter(char c)
193{
194  if (col + 1 > max_line_length) {
195    putc('\n', fp);
196    col = 0;
197  }
198  putc(c, fp);
199  col++;
200  need_space = 0;
201  return *this;
202}
203
204ps_output &ps_output::put_string(const char *s, int n)
205{
206  int len = 0;
207  int i;
208  for (i = 0; i < n; i++) {
209    char c = s[i];
210    if (is_ascii(c) && csprint(c)) {
211      if (c == '(' || c == ')' || c == '\\')
212	len += 2;
213      else
214	len += 1;
215    }
216    else
217      len += 4;
218  }
219  if (len > n*2) {
220    if (col + n*2 + 2 > max_line_length && n*2 + 2 <= max_line_length) {
221      putc('\n', fp);
222      col = 0;
223    }
224    if (col + 1 > max_line_length) {
225      putc('\n', fp);
226      col = 0;
227    }
228    putc('<', fp);
229    col++;
230    for (i = 0; i < n; i++) {
231      if (col + 2 > max_line_length) {
232	putc('\n', fp);
233	col = 0;
234      }
235      fprintf(fp, "%02x", s[i] & 0377);
236      col += 2;
237    }
238    putc('>', fp);
239    col++;
240  }
241  else {
242    if (col + len + 2 > max_line_length && len + 2 <= max_line_length) {
243      putc('\n', fp);
244      col = 0;
245    }
246    if (col + 2 > max_line_length) {
247      putc('\n', fp);
248      col = 0;
249    }
250    putc('(', fp);
251    col++;
252    for (i = 0; i < n; i++) {
253      char c = s[i];
254      if (is_ascii(c) && csprint(c)) {
255	if (c == '(' || c == ')' || c == '\\')
256	  len = 2;
257	else
258	  len = 1;
259      }
260      else
261	len = 4;
262      if (col + len + 1 > max_line_length) {
263	putc('\\', fp);
264	putc('\n', fp);
265	col = 0;
266      }
267      switch (len) {
268      case 1:
269	putc(c, fp);
270	break;
271      case 2:
272	putc('\\', fp);
273	putc(c, fp);
274	break;
275      case 4:
276	fprintf(fp, "\\%03o", c & 0377);
277	break;
278      default:
279	assert(0);
280      }
281      col += len;
282    }
283    putc(')', fp);
284    col++;
285  }
286  need_space = 0;
287  return *this;
288}
289
290ps_output &ps_output::put_number(int n)
291{
292  char buf[1 + INT_DIGITS + 1];
293  sprintf(buf, "%d", n);
294  int len = strlen(buf);
295  if (col > 0 && col + len + need_space > max_line_length) {
296    putc('\n', fp);
297    col = 0;
298    need_space = 0;
299  }
300  if (need_space) {
301    putc(' ', fp);
302    col++;
303  }
304  fputs(buf, fp);
305  col += len;
306  need_space = 1;
307  return *this;
308}
309
310ps_output &ps_output::put_fix_number(int i)
311{
312  const char *p = if_to_a(i, fixed_point);
313  int len = strlen(p);
314  if (col > 0 && col + len + need_space > max_line_length) {
315    putc('\n', fp);
316    col = 0;
317    need_space = 0;
318  }
319  if (need_space) {
320    putc(' ', fp);
321    col++;
322  }
323  fputs(p, fp);
324  col += len;
325  need_space = 1;
326  return *this;
327}
328
329ps_output &ps_output::put_float(double d)
330{
331  char buf[128];
332  sprintf(buf, "%.4f", d);
333  int last = strlen(buf) - 1;
334  while (buf[last] == '0')
335    last--;
336  if (buf[last] == '.')
337    last--;
338  buf[++last] = '\0';
339  if (col > 0 && col + last + need_space > max_line_length) {
340    putc('\n', fp);
341    col = 0;
342    need_space = 0;
343  }
344  if (need_space) {
345    putc(' ', fp);
346    col++;
347  }
348  fputs(buf, fp);
349  col += last;
350  need_space = 1;
351  return *this;
352}
353
354ps_output &ps_output::put_symbol(const char *s)
355{
356  int len = strlen(s);
357  if (col > 0 && col + len + need_space > max_line_length) {
358    putc('\n', fp);
359    col = 0;
360    need_space = 0;
361  }
362  if (need_space) {
363    putc(' ', fp);
364    col++;
365  }
366  fputs(s, fp);
367  col += len;
368  need_space = 1;
369  return *this;
370}
371
372ps_output &ps_output::put_color(unsigned int c)
373{
374  char buf[128];
375  sprintf(buf, "%.3g", double(c) / color::MAX_COLOR_VAL);
376  int len = strlen(buf);
377  if (col > 0 && col + len + need_space > max_line_length) {
378    putc('\n', fp);
379    col = 0;
380    need_space = 0;
381  }
382  if (need_space) {
383    putc(' ', fp);
384    col++;
385  }
386  fputs(buf, fp);
387  col += len;
388  need_space = 1;
389  return *this;
390}
391
392ps_output &ps_output::put_literal_symbol(const char *s)
393{
394  int len = strlen(s);
395  if (col > 0 && col + len + 1 > max_line_length) {
396    putc('\n', fp);
397    col = 0;
398  }
399  putc('/', fp);
400  fputs(s, fp);
401  col += len + 1;
402  need_space = 1;
403  return *this;
404}
405
406class ps_font : public font {
407  ps_font(const char *);
408public:
409  int encoding_index;
410  char *encoding;
411  char *reencoded_name;
412  ~ps_font();
413  void handle_unknown_font_command(const char *command, const char *arg,
414				   const char *filename, int lineno);
415  static ps_font *load_ps_font(const char *);
416};
417
418ps_font *ps_font::load_ps_font(const char *s)
419{
420  ps_font *f = new ps_font(s);
421  if (!f->load()) {
422    delete f;
423    return 0;
424  }
425  return f;
426}
427
428ps_font::ps_font(const char *nm)
429: font(nm), encoding_index(-1), encoding(0), reencoded_name(0)
430{
431}
432
433ps_font::~ps_font()
434{
435  a_delete encoding;
436  a_delete reencoded_name;
437}
438
439void ps_font::handle_unknown_font_command(const char *command, const char *arg,
440					  const char *filename, int lineno)
441{
442  if (strcmp(command, "encoding") == 0) {
443    if (arg == 0)
444      error_with_file_and_line(filename, lineno,
445			       "`encoding' command requires an argument");
446    else
447      encoding = strsave(arg);
448  }
449}
450
451static void handle_unknown_desc_command(const char *command, const char *arg,
452					const char *filename, int lineno)
453{
454  if (strcmp(command, "broken") == 0) {
455    if (arg == 0)
456      error_with_file_and_line(filename, lineno,
457			       "`broken' command requires an argument");
458    else if (!bflag)
459      broken_flags = atoi(arg);
460  }
461}
462
463struct subencoding {
464  font *p;
465  unsigned int num;
466  int idx;
467  char *subfont;
468  const char *glyphs[256];
469  subencoding *next;
470
471  subencoding(font *, unsigned int, int, subencoding *);
472  ~subencoding();
473};
474
475subencoding::subencoding(font *f, unsigned int n, int ix, subencoding *s)
476: p(f), num(n), idx(ix), subfont(0), next(s)
477{
478  for (int i = 0; i < 256; i++)
479    glyphs[i] = 0;
480}
481
482subencoding::~subencoding()
483{
484  a_delete subfont;
485}
486
487struct style {
488  font *f;
489  subencoding *sub;
490  int point_size;
491  int height;
492  int slant;
493  style();
494  style(font *, subencoding *, int, int, int);
495  int operator==(const style &) const;
496  int operator!=(const style &) const;
497};
498
499style::style() : f(0)
500{
501}
502
503style::style(font *p, subencoding *s, int sz, int h, int sl)
504: f(p), sub(s), point_size(sz), height(h), slant(sl)
505{
506}
507
508int style::operator==(const style &s) const
509{
510  return (f == s.f
511	  && sub == s.sub
512	  && point_size == s.point_size
513	  && height == s.height
514	  && slant == s.slant);
515}
516
517int style::operator!=(const style &s) const
518{
519  return !(*this == s);
520}
521
522class ps_printer : public printer {
523  FILE *tempfp;
524  ps_output out;
525  int res;
526  int space_char_index;
527  int pages_output;
528  int paper_length;
529  int equalise_spaces;
530  enum { SBUF_SIZE = 256 };
531  char sbuf[SBUF_SIZE];
532  int sbuf_len;
533  int sbuf_start_hpos;
534  int sbuf_vpos;
535  int sbuf_end_hpos;
536  int sbuf_space_width;
537  int sbuf_space_count;
538  int sbuf_space_diff_count;
539  int sbuf_space_code;
540  int sbuf_kern;
541  style sbuf_style;
542  color sbuf_color;		// the current PS color
543  style output_style;
544  subencoding *subencodings;
545  int output_hpos;
546  int output_vpos;
547  int output_draw_point_size;
548  int line_thickness;
549  int output_line_thickness;
550  unsigned char output_space_code;
551  enum { MAX_DEFINED_STYLES = 50 };
552  style defined_styles[MAX_DEFINED_STYLES];
553  int ndefined_styles;
554  int next_encoding_index;
555  int next_subencoding_index;
556  string defs;
557  int ndefs;
558  resource_manager rm;
559  int invis_count;
560
561  void flush_sbuf();
562  void set_style(const style &);
563  void set_space_code(unsigned char c);
564  int set_encoding_index(ps_font *);
565  subencoding *set_subencoding(font *, int, unsigned char *);
566  char *get_subfont(subencoding *, const char *);
567  void do_exec(char *, const environment *);
568  void do_import(char *, const environment *);
569  void do_def(char *, const environment *);
570  void do_mdef(char *, const environment *);
571  void do_file(char *, const environment *);
572  void do_invis(char *, const environment *);
573  void do_endinvis(char *, const environment *);
574  void set_line_thickness_and_color(const environment *);
575  void fill_path(const environment *);
576  void encode_fonts();
577  void encode_subfont(subencoding *);
578  void define_encoding(const char *, int);
579  void reencode_font(ps_font *);
580  void set_color(color *c, int fill = 0);
581
582  const char *media_name();
583  int media_width();
584  int media_height();
585  void media_set();
586
587public:
588  ps_printer(double);
589  ~ps_printer();
590  void set_char(int i, font *f, const environment *env, int w,
591		const char *name);
592  void draw(int code, int *p, int np, const environment *env);
593  void begin_page(int);
594  void end_page(int);
595  void special(char *arg, const environment *env, char type);
596  font *make_font(const char *);
597  void end_of_line();
598};
599
600// `pl' is in inches
601ps_printer::ps_printer(double pl)
602: out(0, MAX_LINE_LENGTH),
603  pages_output(0),
604  sbuf_len(0),
605  subencodings(0),
606  output_hpos(-1),
607  output_vpos(-1),
608  line_thickness(-1),
609  ndefined_styles(0),
610  next_encoding_index(0),
611  next_subencoding_index(0),
612  ndefs(0),
613  invis_count(0)
614{
615  tempfp = xtmpfile();
616  out.set_file(tempfp);
617  if (linewidth < 0)
618    linewidth = DEFAULT_LINEWIDTH;
619  if (font::hor != 1)
620    fatal("horizontal resolution must be 1");
621  if (font::vert != 1)
622    fatal("vertical resolution must be 1");
623  if (font::res % (font::sizescale*72) != 0)
624    fatal("res must be a multiple of 72*sizescale");
625  int r = font::res;
626  int point = 0;
627  while (r % 10 == 0) {
628    r /= 10;
629    point++;
630  }
631  res = r;
632  out.set_fixed_point(point);
633  space_char_index = font::name_to_index("space");
634  if (pl == 0)
635    paper_length = font::paperlength;
636  else
637    paper_length = int(pl * font::res + 0.5);
638  if (paper_length == 0)
639    paper_length = 11 * font::res;
640  equalise_spaces = font::res >= 72000;
641}
642
643int ps_printer::set_encoding_index(ps_font *f)
644{
645  if (f->encoding_index >= 0)
646    return f->encoding_index;
647  for (font_pointer_list *p = font_list; p; p = p->next)
648    if (p->p != f) {
649      char *encoding = ((ps_font *)p->p)->encoding;
650      int encoding_index = ((ps_font *)p->p)->encoding_index;
651      if (encoding != 0 && encoding_index >= 0
652	  && strcmp(f->encoding, encoding) == 0) {
653	return f->encoding_index = encoding_index;
654      }
655    }
656  return f->encoding_index = next_encoding_index++;
657}
658
659subencoding *ps_printer::set_subencoding(font *f, int i, unsigned char *codep)
660{
661  unsigned int idx = f->get_code(i);
662  *codep = idx % 256;
663  unsigned int num = idx >> 8;
664  if (num == 0)
665    return 0;
666  subencoding *p = 0;
667  for (p = subencodings; p; p = p->next)
668    if (p->p == f && p->num == num)
669      break;
670  if (p == 0)
671    p = subencodings = new subencoding(f, num, next_subencoding_index++,
672				       subencodings);
673  p->glyphs[*codep] = f->get_special_device_encoding(i);
674  return p;
675}
676
677char *ps_printer::get_subfont(subencoding *sub, const char *stem)
678{
679  assert(sub != 0);
680  if (!sub->subfont) {
681    char *tem = new char[strlen(stem) + 2 + INT_DIGITS + 1];
682    sprintf(tem, "%s@@%d", stem, next_subencoding_index);
683    sub->subfont = tem;
684  }
685  return sub->subfont;
686}
687
688void ps_printer::set_char(int i, font *f, const environment *env, int w,
689			  const char *)
690{
691  if (i == space_char_index || invis_count > 0)
692    return;
693  unsigned char code;
694  subencoding *sub = set_subencoding(f, i, &code);
695  style sty(f, sub, env->size, env->height, env->slant);
696  if (sty.slant != 0) {
697    if (sty.slant > 80 || sty.slant < -80) {
698      error("silly slant `%1' degrees", sty.slant);
699      sty.slant = 0;
700    }
701  }
702  if (sbuf_len > 0) {
703    if (sbuf_len < SBUF_SIZE
704	&& sty == sbuf_style
705	&& sbuf_vpos == env->vpos
706	&& sbuf_color == *env->col) {
707      if (sbuf_end_hpos == env->hpos) {
708	sbuf[sbuf_len++] = code;
709	sbuf_end_hpos += w + sbuf_kern;
710	return;
711      }
712      if (sbuf_len == 1 && sbuf_kern == 0) {
713	sbuf_kern = env->hpos - sbuf_end_hpos;
714	sbuf_end_hpos = env->hpos + sbuf_kern + w;
715	sbuf[sbuf_len++] = code;
716	return;
717      }
718      /* If sbuf_end_hpos - sbuf_kern == env->hpos, we are better off
719	 starting a new string. */
720      if (sbuf_len < SBUF_SIZE - 1 && env->hpos >= sbuf_end_hpos
721	  && (sbuf_kern == 0 || sbuf_end_hpos - sbuf_kern != env->hpos)) {
722	if (sbuf_space_code < 0) {
723	  if (f->contains(space_char_index)) {
724	    sbuf_space_code = f->get_code(space_char_index);
725	    sbuf_space_width = env->hpos - sbuf_end_hpos;
726	    sbuf_end_hpos = env->hpos + w + sbuf_kern;
727	    sbuf[sbuf_len++] = sbuf_space_code;
728	    sbuf[sbuf_len++] = code;
729	    sbuf_space_count++;
730	    return;
731	  }
732	}
733	else {
734	  int diff = env->hpos - sbuf_end_hpos - sbuf_space_width;
735	  if (diff == 0 || (equalise_spaces && (diff == 1 || diff == -1))) {
736	    sbuf_end_hpos = env->hpos + w + sbuf_kern;
737	    sbuf[sbuf_len++] = sbuf_space_code;
738	    sbuf[sbuf_len++] = code;
739	    sbuf_space_count++;
740	    if (diff == 1)
741	      sbuf_space_diff_count++;
742	    else if (diff == -1)
743	      sbuf_space_diff_count--;
744	    return;
745	  }
746	}
747      }
748    }
749    flush_sbuf();
750  }
751  sbuf_len = 1;
752  sbuf[0] = code;
753  sbuf_end_hpos = env->hpos + w;
754  sbuf_start_hpos = env->hpos;
755  sbuf_vpos = env->vpos;
756  sbuf_style = sty;
757  sbuf_space_code = -1;
758  sbuf_space_width = 0;
759  sbuf_space_count = sbuf_space_diff_count = 0;
760  sbuf_kern = 0;
761  if (sbuf_color != *env->col)
762    set_color(env->col);
763}
764
765static char *make_encoding_name(int encoding_index)
766{
767  static char buf[3 + INT_DIGITS + 1];
768  sprintf(buf, "ENC%d", encoding_index);
769  return buf;
770}
771
772static char *make_subencoding_name(int subencoding_index)
773{
774  static char buf[6 + INT_DIGITS + 1];
775  sprintf(buf, "SUBENC%d", subencoding_index);
776  return buf;
777}
778
779const char *const WS = " \t\n\r";
780
781void ps_printer::define_encoding(const char *encoding, int encoding_index)
782{
783  char *vec[256];
784  int i;
785  for (i = 0; i < 256; i++)
786    vec[i] = 0;
787  char *path;
788  FILE *fp = font::open_file(encoding, &path);
789  if (fp == 0)
790    fatal("can't open encoding file `%1'", encoding);
791  int lineno = 1;
792  const int BUFFER_SIZE = 512;
793  char buf[BUFFER_SIZE];
794  while (fgets(buf, BUFFER_SIZE, fp) != 0) {
795    char *p = buf;
796    while (csspace(*p))
797      p++;
798    if (*p != '#' && *p != '\0' && (p = strtok(buf, WS)) != 0) {
799      char *q = strtok(0, WS);
800      int n = 0;		// pacify compiler
801      if (q == 0 || sscanf(q, "%d", &n) != 1 || n < 0 || n >= 256)
802	fatal_with_file_and_line(path, lineno, "bad second field");
803      vec[n] = new char[strlen(p) + 1];
804      strcpy(vec[n], p);
805    }
806    lineno++;
807  }
808  a_delete path;
809  out.put_literal_symbol(make_encoding_name(encoding_index))
810     .put_delimiter('[');
811  for (i = 0; i < 256; i++) {
812    if (vec[i] == 0)
813      out.put_literal_symbol(".notdef");
814    else {
815      out.put_literal_symbol(vec[i]);
816      a_delete vec[i];
817    }
818  }
819  out.put_delimiter(']')
820     .put_symbol("def");
821  fclose(fp);
822}
823
824void ps_printer::reencode_font(ps_font *f)
825{
826  out.put_literal_symbol(f->reencoded_name)
827     .put_symbol(make_encoding_name(f->encoding_index))
828     .put_literal_symbol(f->get_internal_name())
829     .put_symbol("RE");
830}
831
832void ps_printer::encode_fonts()
833{
834  if (next_encoding_index == 0)
835    return;
836  char *done_encoding = new char[next_encoding_index];
837  for (int i = 0; i < next_encoding_index; i++)
838    done_encoding[i] = 0;
839  for (font_pointer_list *f = font_list; f; f = f->next) {
840    int encoding_index = ((ps_font *)f->p)->encoding_index;
841    if (encoding_index >= 0) {
842      assert(encoding_index < next_encoding_index);
843      if (!done_encoding[encoding_index]) {
844	done_encoding[encoding_index] = 1;
845	define_encoding(((ps_font *)f->p)->encoding, encoding_index);
846      }
847      reencode_font((ps_font *)f->p);
848    }
849  }
850  a_delete done_encoding;
851}
852
853void ps_printer::encode_subfont(subencoding *sub)
854{
855  assert(sub->glyphs != 0);
856  out.put_literal_symbol(make_subencoding_name(sub->idx))
857     .put_delimiter('[');
858  for (int i = 0; i < 256; i++)
859  {
860    if (sub->glyphs[i])
861      out.put_literal_symbol(sub->glyphs[i]);
862    else
863      out.put_literal_symbol(".notdef");
864  }
865  out.put_delimiter(']')
866     .put_symbol("def");
867}
868
869void ps_printer::set_style(const style &sty)
870{
871  char buf[1 + INT_DIGITS + 1];
872  for (int i = 0; i < ndefined_styles; i++)
873    if (sty == defined_styles[i]) {
874      sprintf(buf, "F%d", i);
875      out.put_symbol(buf);
876      return;
877    }
878  if (ndefined_styles >= MAX_DEFINED_STYLES)
879    ndefined_styles = 0;
880  sprintf(buf, "F%d", ndefined_styles);
881  out.put_literal_symbol(buf);
882  const char *psname = sty.f->get_internal_name();
883  if (psname == 0)
884    fatal("no internalname specified for font `%1'", sty.f->get_name());
885  char *encoding = ((ps_font *)sty.f)->encoding;
886  if (sty.sub == 0) {
887    if (encoding != 0) {
888      char *s = ((ps_font *)sty.f)->reencoded_name;
889      if (s == 0) {
890	int ei = set_encoding_index((ps_font *)sty.f);
891	char *tem = new char[strlen(psname) + 1 + INT_DIGITS + 1];
892	sprintf(tem, "%s@%d", psname, ei);
893	psname = tem;
894	((ps_font *)sty.f)->reencoded_name = tem;
895      }
896      else
897        psname = s;
898    }
899  }
900  else
901    psname = get_subfont(sty.sub, psname);
902  out.put_fix_number((font::res/(72*font::sizescale))*sty.point_size);
903  if (sty.height != 0 || sty.slant != 0) {
904    int h = sty.height == 0 ? sty.point_size : sty.height;
905    h *= font::res/(72*font::sizescale);
906    int c = int(h*tan(radians(sty.slant)) + .5);
907    out.put_fix_number(c)
908       .put_fix_number(h)
909       .put_literal_symbol(psname)
910       .put_symbol("MF");
911  }
912  else {
913    out.put_literal_symbol(psname)
914       .put_symbol("SF");
915  }
916  defined_styles[ndefined_styles++] = sty;
917}
918
919void ps_printer::set_color(color *col, int fill)
920{
921  sbuf_color = *col;
922  unsigned int components[4];
923  char s[3];
924  color_scheme cs = col->get_components(components);
925  s[0] = fill ? 'F' : 'C';
926  s[2] = 0;
927  switch (cs) {
928  case DEFAULT:			// black
929    out.put_symbol("0");
930    s[1] = 'g';
931    break;
932  case RGB:
933    out.put_color(Red)
934       .put_color(Green)
935       .put_color(Blue);
936    s[1] = 'r';
937    break;
938  case CMY:
939    col->get_cmyk(&Cyan, &Magenta, &Yellow, &Black);
940    // fall through
941  case CMYK:
942    out.put_color(Cyan)
943       .put_color(Magenta)
944       .put_color(Yellow)
945       .put_color(Black);
946    s[1] = 'k';
947    cmyk_flag = 1;
948    break;
949  case GRAY:
950    out.put_color(Gray);
951    s[1] = 'g';
952    break;
953  }
954  out.put_symbol(s);
955}
956
957void ps_printer::set_space_code(unsigned char c)
958{
959  out.put_literal_symbol("SC")
960     .put_number(c)
961     .put_symbol("def");
962}
963
964void ps_printer::end_of_line()
965{
966  flush_sbuf();
967  // this ensures that we do an absolute motion to the beginning of a line
968  output_vpos = output_hpos = -1;
969}
970
971void ps_printer::flush_sbuf()
972{
973  enum {
974    NONE,
975    RELATIVE_H,
976    RELATIVE_V,
977    RELATIVE_HV,
978    ABSOLUTE
979    } motion = NONE;
980  int space_flag = 0;
981  if (sbuf_len == 0)
982    return;
983  if (output_style != sbuf_style) {
984    set_style(sbuf_style);
985    output_style = sbuf_style;
986  }
987  int extra_space = 0;
988  if (output_hpos < 0 || output_vpos < 0)
989    motion = ABSOLUTE;
990  else {
991    if (output_hpos != sbuf_start_hpos)
992      motion = RELATIVE_H;
993    if (output_vpos != sbuf_vpos) {
994      if  (motion != NONE)
995	motion = RELATIVE_HV;
996      else
997	motion = RELATIVE_V;
998    }
999  }
1000  if (sbuf_space_code >= 0) {
1001    int w = sbuf_style.f->get_width(space_char_index, sbuf_style.point_size);
1002    if (w + sbuf_kern != sbuf_space_width) {
1003      if (sbuf_space_code != output_space_code) {
1004	set_space_code(sbuf_space_code);
1005	output_space_code = sbuf_space_code;
1006      }
1007      space_flag = 1;
1008      extra_space = sbuf_space_width - w - sbuf_kern;
1009      if (sbuf_space_diff_count > sbuf_space_count/2)
1010	extra_space++;
1011      else if (sbuf_space_diff_count < -(sbuf_space_count/2))
1012	extra_space--;
1013    }
1014  }
1015  if (space_flag)
1016    out.put_fix_number(extra_space);
1017  if (sbuf_kern != 0)
1018    out.put_fix_number(sbuf_kern);
1019  out.put_string(sbuf, sbuf_len);
1020  char command_array[] = {'A', 'B', 'C', 'D',
1021			  'E', 'F', 'G', 'H',
1022			  'I', 'J', 'K', 'L',
1023			  'M', 'N', 'O', 'P',
1024			  'Q', 'R', 'S', 'T'};
1025  char sym[2];
1026  sym[0] = command_array[motion*4 + space_flag + 2*(sbuf_kern != 0)];
1027  sym[1] = '\0';
1028  switch (motion) {
1029  case NONE:
1030    break;
1031  case ABSOLUTE:
1032    out.put_fix_number(sbuf_start_hpos)
1033       .put_fix_number(sbuf_vpos);
1034    break;
1035  case RELATIVE_H:
1036    out.put_fix_number(sbuf_start_hpos - output_hpos);
1037    break;
1038  case RELATIVE_V:
1039    out.put_fix_number(sbuf_vpos - output_vpos);
1040    break;
1041  case RELATIVE_HV:
1042    out.put_fix_number(sbuf_start_hpos - output_hpos)
1043       .put_fix_number(sbuf_vpos - output_vpos);
1044    break;
1045  default:
1046    assert(0);
1047  }
1048  out.put_symbol(sym);
1049  output_hpos = sbuf_end_hpos;
1050  output_vpos = sbuf_vpos;
1051  sbuf_len = 0;
1052}
1053
1054void ps_printer::set_line_thickness_and_color(const environment *env)
1055{
1056  if (line_thickness < 0) {
1057    if (output_draw_point_size != env->size) {
1058      // we ought to check for overflow here
1059      int lw = ((font::res/(72*font::sizescale))*linewidth*env->size)/1000;
1060      out.put_fix_number(lw)
1061	 .put_symbol("LW");
1062      output_draw_point_size = env->size;
1063      output_line_thickness = -1;
1064    }
1065  }
1066  else {
1067    if (output_line_thickness != line_thickness) {
1068      out.put_fix_number(line_thickness)
1069	 .put_symbol("LW");
1070      output_line_thickness = line_thickness;
1071      output_draw_point_size = -1;
1072    }
1073  }
1074  if (sbuf_color != *env->col)
1075    set_color(env->col);
1076}
1077
1078void ps_printer::fill_path(const environment *env)
1079{
1080  if (sbuf_color == *env->fill)
1081    out.put_symbol("FL");
1082  else
1083    set_color(env->fill, 1);
1084}
1085
1086void ps_printer::draw(int code, int *p, int np, const environment *env)
1087{
1088  if (invis_count > 0)
1089    return;
1090  flush_sbuf();
1091  int fill_flag = 0;
1092  switch (code) {
1093  case 'C':
1094    fill_flag = 1;
1095    // fall through
1096  case 'c':
1097    // troff adds an extra argument to C
1098    if (np != 1 && !(code == 'C' && np == 2)) {
1099      error("1 argument required for circle");
1100      break;
1101    }
1102    out.put_fix_number(env->hpos + p[0]/2)
1103       .put_fix_number(env->vpos)
1104       .put_fix_number(p[0]/2)
1105       .put_symbol("DC");
1106    if (fill_flag)
1107      fill_path(env);
1108    else {
1109      set_line_thickness_and_color(env);
1110      out.put_symbol("ST");
1111    }
1112    break;
1113  case 'l':
1114    if (np != 2) {
1115      error("2 arguments required for line");
1116      break;
1117    }
1118    set_line_thickness_and_color(env);
1119    out.put_fix_number(p[0] + env->hpos)
1120       .put_fix_number(p[1] + env->vpos)
1121       .put_fix_number(env->hpos)
1122       .put_fix_number(env->vpos)
1123       .put_symbol("DL");
1124    break;
1125  case 'E':
1126    fill_flag = 1;
1127    // fall through
1128  case 'e':
1129    if (np != 2) {
1130      error("2 arguments required for ellipse");
1131      break;
1132    }
1133    out.put_fix_number(p[0])
1134       .put_fix_number(p[1])
1135       .put_fix_number(env->hpos + p[0]/2)
1136       .put_fix_number(env->vpos)
1137       .put_symbol("DE");
1138    if (fill_flag)
1139      fill_path(env);
1140    else {
1141      set_line_thickness_and_color(env);
1142      out.put_symbol("ST");
1143    }
1144    break;
1145  case 'P':
1146    fill_flag = 1;
1147    // fall through
1148  case 'p':
1149    {
1150      if (np & 1) {
1151	error("even number of arguments required for polygon");
1152	break;
1153      }
1154      if (np == 0) {
1155	error("no arguments for polygon");
1156	break;
1157      }
1158      out.put_fix_number(env->hpos)
1159	 .put_fix_number(env->vpos)
1160	 .put_symbol("MT");
1161      for (int i = 0; i < np; i += 2)
1162	out.put_fix_number(p[i])
1163	   .put_fix_number(p[i+1])
1164	   .put_symbol("RL");
1165      out.put_symbol("CL");
1166      if (fill_flag)
1167	fill_path(env);
1168      else {
1169	set_line_thickness_and_color(env);
1170	out.put_symbol("ST");
1171      }
1172      break;
1173    }
1174  case '~':
1175    {
1176      if (np & 1) {
1177	error("even number of arguments required for spline");
1178	break;
1179      }
1180      if (np == 0) {
1181	error("no arguments for spline");
1182	break;
1183      }
1184      out.put_fix_number(env->hpos)
1185	 .put_fix_number(env->vpos)
1186	 .put_symbol("MT");
1187      out.put_fix_number(p[0]/2)
1188	 .put_fix_number(p[1]/2)
1189	 .put_symbol("RL");
1190      /* tnum/tden should be between 0 and 1; the closer it is to 1
1191	 the tighter the curve will be to the guiding lines; 2/3
1192	 is the standard value */
1193      const int tnum = 2;
1194      const int tden = 3;
1195      for (int i = 0; i < np - 2; i += 2) {
1196	out.put_fix_number((p[i]*tnum)/(2*tden))
1197	   .put_fix_number((p[i + 1]*tnum)/(2*tden))
1198	   .put_fix_number(p[i]/2 + (p[i + 2]*(tden - tnum))/(2*tden))
1199	   .put_fix_number(p[i + 1]/2 + (p[i + 3]*(tden - tnum))/(2*tden))
1200	   .put_fix_number((p[i] - p[i]/2) + p[i + 2]/2)
1201	   .put_fix_number((p[i + 1] - p[i + 1]/2) + p[i + 3]/2)
1202	   .put_symbol("RC");
1203      }
1204      out.put_fix_number(p[np - 2] - p[np - 2]/2)
1205	 .put_fix_number(p[np - 1] - p[np - 1]/2)
1206	 .put_symbol("RL");
1207      set_line_thickness_and_color(env);
1208      out.put_symbol("ST");
1209    }
1210    break;
1211  case 'a':
1212    {
1213      if (np != 4) {
1214	error("4 arguments required for arc");
1215	break;
1216      }
1217      set_line_thickness_and_color(env);
1218      double c[2];
1219      if (adjust_arc_center(p, c))
1220	out.put_fix_number(env->hpos + int(c[0]))
1221	   .put_fix_number(env->vpos + int(c[1]))
1222	   .put_fix_number(int(sqrt(c[0]*c[0] + c[1]*c[1])))
1223	   .put_float(degrees(atan2(-c[1], -c[0])))
1224	   .put_float(degrees(atan2(p[1] + p[3] - c[1], p[0] + p[2] - c[0])))
1225	   .put_symbol("DA");
1226      else
1227	out.put_fix_number(p[0] + p[2] + env->hpos)
1228	   .put_fix_number(p[1] + p[3] + env->vpos)
1229	   .put_fix_number(env->hpos)
1230	   .put_fix_number(env->vpos)
1231	   .put_symbol("DL");
1232    }
1233    break;
1234  case 't':
1235    if (np == 0)
1236      line_thickness = -1;
1237    else {
1238      // troff gratuitously adds an extra 0
1239      if (np != 1 && np != 2) {
1240	error("0 or 1 argument required for thickness");
1241	break;
1242      }
1243      line_thickness = p[0];
1244    }
1245    break;
1246  default:
1247    error("unrecognised drawing command `%1'", char(code));
1248    break;
1249  }
1250  output_hpos = output_vpos = -1;
1251}
1252
1253const char *ps_printer::media_name()
1254{
1255  return "Default";
1256}
1257
1258int ps_printer::media_width()
1259{
1260  /*
1261   *  NOTE:
1262   *  Although paper size is defined as real numbers, it seems to be
1263   *  a common convention to round to the nearest postscript unit.
1264   *  For example, a4 is really 595.276 by 841.89 but we use 595 by 842.
1265   *
1266   *  This is probably a good compromise, especially since the
1267   *  Postscript definition specifies that media
1268   *  matching should be done within a tolerance of 5 units.
1269   */
1270  return int(user_paper_width ? user_paper_width*72.0 + 0.5
1271			      : font::paperwidth*72.0/font::res + 0.5);
1272}
1273
1274int ps_printer::media_height()
1275{
1276  return int(user_paper_length ? user_paper_length*72.0 + 0.5
1277			       : paper_length*72.0/font::res + 0.5);
1278}
1279
1280void ps_printer::media_set()
1281{
1282  /*
1283   *  The setpagedevice implies an erasepage and initgraphics, and
1284   *  must thus precede any descriptions for a particular page.
1285   *
1286   *  NOTE:
1287   *  This does not work with ps2pdf when there are included eps
1288   *  segments that contain PageSize/setpagedevice.
1289   *  This might be a bug in ghostscript -- must be investigated.
1290   *  Using setpagedevice in an .eps is really the wrong concept, anyway.
1291   *
1292   *  NOTE:
1293   *  For the future, this is really the place to insert other
1294   *  media selection features, like:
1295   *    MediaColor
1296   *    MediaPosition
1297   *    MediaType
1298   *    MediaWeight
1299   *    MediaClass
1300   *    TraySwitch
1301   *    ManualFeed
1302   *    InsertSheet
1303   *    Duplex
1304   *    Collate
1305   *    ProcessColorModel
1306   *  etc.
1307   */
1308  if (!(broken_flags & (USE_PS_ADOBE_2_0|NO_PAPERSIZE))) {
1309    out.begin_comment("BeginFeature:")
1310       .comment_arg("*PageSize")
1311       .comment_arg(media_name())
1312       .end_comment();
1313    int w = media_width();
1314    int h = media_height();
1315    if (w > 0 && h > 0)
1316      // warning to user is done elsewhere
1317      fprintf(out.get_file(),
1318	      "<< /PageSize [ %d %d ] /ImagingBBox null >> setpagedevice\n",
1319	      w, h);
1320    out.simple_comment("EndFeature");
1321  }
1322}
1323
1324void ps_printer::begin_page(int n)
1325{
1326  out.begin_comment("Page:")
1327     .comment_arg(i_to_a(n));
1328  out.comment_arg(i_to_a(++pages_output))
1329     .end_comment();
1330  output_style.f = 0;
1331  output_space_code = 32;
1332  output_draw_point_size = -1;
1333  output_line_thickness = -1;
1334  output_hpos = output_vpos = -1;
1335  ndefined_styles = 0;
1336  out.simple_comment("BeginPageSetup");
1337
1338#if 0
1339  /*
1340   *  NOTE:
1341   *  may decide to do this once per page
1342   */
1343  media_set();
1344#endif
1345
1346  out.put_symbol("BP")
1347     .simple_comment("EndPageSetup");
1348  if (sbuf_color != default_color)
1349    set_color(&sbuf_color);
1350}
1351
1352void ps_printer::end_page(int)
1353{
1354  flush_sbuf();
1355  set_color(&default_color);
1356  out.put_symbol("EP");
1357  if (invis_count != 0) {
1358    error("missing `endinvis' command");
1359    invis_count = 0;
1360  }
1361}
1362
1363font *ps_printer::make_font(const char *nm)
1364{
1365  return ps_font::load_ps_font(nm);
1366}
1367
1368ps_printer::~ps_printer()
1369{
1370  out.simple_comment("Trailer")
1371     .put_symbol("end")
1372     .simple_comment("EOF");
1373  if (fseek(tempfp, 0L, 0) < 0)
1374    fatal("fseek on temporary file failed");
1375  fputs("%!PS-Adobe-", stdout);
1376  fputs((broken_flags & USE_PS_ADOBE_2_0) ? "2.0" : "3.0", stdout);
1377  putchar('\n');
1378  out.set_file(stdout);
1379  if (cmyk_flag)
1380    out.begin_comment("Extensions:")
1381       .comment_arg("CMYK")
1382       .end_comment();
1383  out.begin_comment("Creator:")
1384     .comment_arg("groff")
1385     .comment_arg("version")
1386     .comment_arg(Version_string)
1387     .end_comment();
1388  {
1389    fputs("%%CreationDate: ", out.get_file());
1390#ifdef LONG_FOR_TIME_T
1391    long
1392#else
1393    time_t
1394#endif
1395    t = time(0);
1396    fputs(ctime(&t), out.get_file());
1397  }
1398  for (font_pointer_list *f = font_list; f; f = f->next) {
1399    ps_font *psf = (ps_font *)(f->p);
1400    rm.need_font(psf->get_internal_name());
1401  }
1402  rm.print_header_comments(out);
1403  out.begin_comment("Pages:")
1404     .comment_arg(i_to_a(pages_output))
1405     .end_comment();
1406  out.begin_comment("PageOrder:")
1407     .comment_arg("Ascend")
1408     .end_comment();
1409  if (!(broken_flags & NO_PAPERSIZE)) {
1410    int w = media_width();
1411    int h = media_height();
1412    if (w > 0 && h > 0)
1413      fprintf(out.get_file(),
1414	      "%%%%DocumentMedia: %s %d %d %d %s %s\n",
1415	      media_name(),			// tag name of media
1416	      w,				// media width
1417	      h,				// media height
1418	      0,				// weight in g/m2
1419	      "()",				// paper color, e.g. white
1420	      "()"				// preprinted form type
1421	     );
1422    else {
1423      if (h <= 0)
1424	// see ps_printer::ps_printer
1425	warning("bad paper height, defaulting to 11i");
1426      if (w <= 0)
1427	warning("bad paper width");
1428    }
1429  }
1430  out.begin_comment("Orientation:")
1431     .comment_arg(landscape_flag ? "Landscape" : "Portrait")
1432     .end_comment();
1433  if (ncopies != 1) {
1434    out.end_line();
1435    fprintf(out.get_file(), "%%%%Requirements: numcopies(%d)\n", ncopies);
1436  }
1437  out.simple_comment("EndComments");
1438  if (!(broken_flags & NO_PAPERSIZE)) {
1439    /* gv works fine without this one, but it really should be there. */
1440    out.simple_comment("BeginDefaults");
1441    fprintf(out.get_file(), "%%%%PageMedia: %s\n", media_name());
1442    out.simple_comment("EndDefaults");
1443  }
1444  out.simple_comment("BeginProlog");
1445  rm.output_prolog(out);
1446  if (!(broken_flags & NO_SETUP_SECTION)) {
1447    out.simple_comment("EndProlog");
1448    out.simple_comment("BeginSetup");
1449  }
1450#if 1
1451  /*
1452   * Define paper (i.e., media) size for entire document here.
1453   * This allows ps2pdf to correctly determine page size, for instance.
1454   */
1455  media_set();
1456#endif
1457  rm.document_setup(out);
1458  out.put_symbol(dict_name)
1459     .put_symbol("begin");
1460  if (ndefs > 0)
1461    ndefs += DEFS_DICT_SPARE;
1462  out.put_literal_symbol(defs_dict_name)
1463     .put_number(ndefs + 1)
1464     .put_symbol("dict")
1465     .put_symbol("def");
1466  out.put_symbol(defs_dict_name)
1467     .put_symbol("begin");
1468  out.put_literal_symbol("u")
1469     .put_delimiter('{')
1470     .put_fix_number(1)
1471     .put_symbol("mul")
1472     .put_delimiter('}')
1473     .put_symbol("bind")
1474     .put_symbol("def");
1475  defs += '\0';
1476  out.special(defs.contents());
1477  out.put_symbol("end");
1478  if (ncopies != 1)
1479    out.put_literal_symbol("#copies")
1480       .put_number(ncopies)
1481       .put_symbol("def");
1482  out.put_literal_symbol("RES")
1483     .put_number(res)
1484     .put_symbol("def");
1485  out.put_literal_symbol("PL");
1486  if (guess_flag)
1487    out.put_symbol("PLG");
1488  else
1489    out.put_fix_number(paper_length);
1490  out.put_symbol("def");
1491  out.put_literal_symbol("LS")
1492     .put_symbol(landscape_flag ? "true" : "false")
1493     .put_symbol("def");
1494  if (manual_feed_flag) {
1495    out.begin_comment("BeginFeature:")
1496       .comment_arg("*ManualFeed")
1497       .comment_arg("True")
1498       .end_comment()
1499       .put_symbol("MANUAL")
1500       .simple_comment("EndFeature");
1501  }
1502  encode_fonts();
1503  while (subencodings) {
1504    subencoding *tem = subencodings;
1505    subencodings = subencodings->next;
1506    encode_subfont(tem);
1507    out.put_literal_symbol(tem->subfont)
1508       .put_symbol(make_subencoding_name(tem->idx))
1509       .put_literal_symbol(tem->p->get_internal_name())
1510       .put_symbol("RE");
1511    delete tem;
1512  }
1513  out.simple_comment((broken_flags & NO_SETUP_SECTION)
1514		     ? "EndProlog"
1515		     : "EndSetup");
1516  out.end_line();
1517  out.copy_file(tempfp);
1518  fclose(tempfp);
1519}
1520
1521void ps_printer::special(char *arg, const environment *env, char type)
1522{
1523  if (type != 'p')
1524    return;
1525  typedef void (ps_printer::*SPECIAL_PROCP)(char *, const environment *);
1526  static struct {
1527    const char *name;
1528    SPECIAL_PROCP proc;
1529  } proc_table[] = {
1530    { "exec", &ps_printer::do_exec },
1531    { "def", &ps_printer::do_def },
1532    { "mdef", &ps_printer::do_mdef },
1533    { "import", &ps_printer::do_import },
1534    { "file", &ps_printer::do_file },
1535    { "invis", &ps_printer::do_invis },
1536    { "endinvis", &ps_printer::do_endinvis },
1537  };
1538  char *p;
1539  for (p = arg; *p == ' ' || *p == '\n'; p++)
1540    ;
1541  char *tag = p;
1542  for (; *p != '\0' && *p != ':' && *p != ' ' && *p != '\n'; p++)
1543    ;
1544  if (*p == '\0' || strncmp(tag, "ps", p - tag) != 0) {
1545    error("X command without `ps:' tag ignored");
1546    return;
1547  }
1548  p++;
1549  for (; *p == ' ' || *p == '\n'; p++)
1550    ;
1551  char *command = p;
1552  for (; *p != '\0' && *p != ' ' && *p != '\n'; p++)
1553    ;
1554  if (*command == '\0') {
1555    error("empty X command ignored");
1556    return;
1557  }
1558  for (unsigned int i = 0; i < sizeof(proc_table)/sizeof(proc_table[0]); i++)
1559    if (strncmp(command, proc_table[i].name, p - command) == 0) {
1560      (this->*(proc_table[i].proc))(p, env);
1561      return;
1562    }
1563  error("X command `%1' not recognised", command);
1564}
1565
1566// A conforming PostScript document must not have lines longer
1567// than 255 characters (excluding line termination characters).
1568
1569static int check_line_lengths(const char *p)
1570{
1571  for (;;) {
1572    const char *end = strchr(p, '\n');
1573    if (end == 0)
1574      end = strchr(p, '\0');
1575    if (end - p > 255)
1576      return 0;
1577    if (*end == '\0')
1578      break;
1579    p = end + 1;
1580  }
1581  return 1;
1582}
1583
1584void ps_printer::do_exec(char *arg, const environment *env)
1585{
1586  flush_sbuf();
1587  while (csspace(*arg))
1588    arg++;
1589  if (*arg == '\0') {
1590    error("missing argument to X exec command");
1591    return;
1592  }
1593  if (!check_line_lengths(arg)) {
1594    error("lines in X exec command must not be more than 255 characters long");
1595    return;
1596  }
1597  out.put_fix_number(env->hpos)
1598     .put_fix_number(env->vpos)
1599     .put_symbol("EBEGIN")
1600     .special(arg)
1601     .put_symbol("EEND");
1602  output_hpos = output_vpos = -1;
1603  output_style.f = 0;
1604  output_draw_point_size = -1;
1605  output_line_thickness = -1;
1606  ndefined_styles = 0;
1607  if (!ndefs)
1608    ndefs = 1;
1609}
1610
1611void ps_printer::do_file(char *arg, const environment *env)
1612{
1613  flush_sbuf();
1614  while (csspace(*arg))
1615    arg++;
1616  if (*arg == '\0') {
1617    error("missing argument to X file command");
1618    return;
1619  }
1620  const char *filename = arg;
1621  do {
1622    ++arg;
1623  } while (*arg != '\0' && *arg != ' ' && *arg != '\n');
1624  out.put_fix_number(env->hpos)
1625     .put_fix_number(env->vpos)
1626     .put_symbol("EBEGIN");
1627  rm.import_file(filename, out);
1628  out.put_symbol("EEND");
1629  output_hpos = output_vpos = -1;
1630  output_style.f = 0;
1631  output_draw_point_size = -1;
1632  output_line_thickness = -1;
1633  ndefined_styles = 0;
1634  if (!ndefs)
1635    ndefs = 1;
1636}
1637
1638void ps_printer::do_def(char *arg, const environment *)
1639{
1640  flush_sbuf();
1641  while (csspace(*arg))
1642    arg++;
1643  if (!check_line_lengths(arg)) {
1644    error("lines in X def command must not be more than 255 characters long");
1645    return;
1646  }
1647  defs += arg;
1648  if (*arg != '\0' && strchr(arg, '\0')[-1] != '\n')
1649    defs += '\n';
1650  ndefs++;
1651}
1652
1653// Like def, but the first argument says how many definitions it contains.
1654
1655void ps_printer::do_mdef(char *arg, const environment *)
1656{
1657  flush_sbuf();
1658  char *p;
1659  int n = (int)strtol(arg, &p, 10);
1660  if (n == 0 && p == arg) {
1661    error("first argument to X mdef must be an integer");
1662    return;
1663  }
1664  if (n < 0) {
1665    error("out of range argument `%1' to X mdef command", int(n));
1666    return;
1667  }
1668  arg = p;
1669  while (csspace(*arg))
1670    arg++;
1671  if (!check_line_lengths(arg)) {
1672    error("lines in X mdef command must not be more than 255 characters long");
1673    return;
1674  }
1675  defs += arg;
1676  if (*arg != '\0' && strchr(arg, '\0')[-1] != '\n')
1677    defs += '\n';
1678  ndefs += n;
1679}
1680
1681void ps_printer::do_import(char *arg, const environment *env)
1682{
1683  flush_sbuf();
1684  while (*arg == ' ' || *arg == '\n')
1685    arg++;
1686  char *p;
1687  for (p = arg; *p != '\0' && *p != ' ' && *p != '\n'; p++)
1688    ;
1689  if (*p != '\0')
1690    *p++ = '\0';
1691  int parms[6];
1692  int nparms = 0;
1693  while (nparms < 6) {
1694    char *end;
1695    long n = strtol(p, &end, 10);
1696    if (n == 0 && end == p)
1697      break;
1698    parms[nparms++] = int(n);
1699    p = end;
1700  }
1701  if (csalpha(*p) && (p[1] == '\0' || p[1] == ' ' || p[1] == '\n')) {
1702    error("scaling indicators not allowed in arguments for X import command");
1703    return;
1704  }
1705  while (*p == ' ' || *p == '\n')
1706    p++;
1707  if (nparms < 5) {
1708    if (*p == '\0')
1709      error("too few arguments for X import command");
1710    else
1711      error("invalid argument `%1' for X import command", p);
1712    return;
1713  }
1714  if (*p != '\0') {
1715    error("superfluous argument `%1' for X import command", p);
1716    return;
1717  }
1718  int llx = parms[0];
1719  int lly = parms[1];
1720  int urx = parms[2];
1721  int ury = parms[3];
1722  int desired_width = parms[4];
1723  int desired_height = parms[5];
1724  if (desired_width <= 0) {
1725    error("bad width argument `%1' for X import command: must be > 0",
1726	  desired_width);
1727    return;
1728  }
1729  if (nparms == 6 && desired_height <= 0) {
1730    error("bad height argument `%1' for X import command: must be > 0",
1731	  desired_height);
1732    return;
1733  }
1734  if (llx == urx) {
1735    error("llx and urx arguments for X import command must not be equal");
1736    return;
1737  }
1738  if (lly == ury) {
1739    error("lly and ury arguments for X import command must not be equal");
1740    return;
1741  }
1742  if (nparms == 5) {
1743    int old_wid = urx - llx;
1744    int old_ht = ury - lly;
1745    if (old_wid < 0)
1746      old_wid = -old_wid;
1747    if (old_ht < 0)
1748      old_ht = -old_ht;
1749    desired_height = int(desired_width*(double(old_ht)/double(old_wid)) + .5);
1750  }
1751  if (env->vpos - desired_height < 0)
1752    warning("top of imported graphic is above the top of the page");
1753  out.put_number(llx)
1754     .put_number(lly)
1755     .put_fix_number(desired_width)
1756     .put_number(urx - llx)
1757     .put_fix_number(-desired_height)
1758     .put_number(ury - lly)
1759     .put_fix_number(env->hpos)
1760     .put_fix_number(env->vpos)
1761     .put_symbol("PBEGIN");
1762  rm.import_file(arg, out);
1763  // do this here just in case application defines PEND
1764  out.put_symbol("end")
1765     .put_symbol("PEND");
1766}
1767
1768void ps_printer::do_invis(char *, const environment *)
1769{
1770  invis_count++;
1771}
1772
1773void ps_printer::do_endinvis(char *, const environment *)
1774{
1775  if (invis_count == 0)
1776    error("unbalanced `endinvis' command");
1777  else
1778    --invis_count;
1779}
1780
1781printer *make_printer()
1782{
1783  return new ps_printer(user_paper_length);
1784}
1785
1786static void usage(FILE *stream);
1787
1788int main(int argc, char **argv)
1789{
1790  setlocale(LC_NUMERIC, "C");
1791  program_name = argv[0];
1792  string env;
1793  static char stderr_buf[BUFSIZ];
1794  setbuf(stderr, stderr_buf);
1795  int c;
1796  static const struct option long_options[] = {
1797    { "help", no_argument, 0, CHAR_MAX + 1 },
1798    { "version", no_argument, 0, 'v' },
1799    { NULL, 0, 0, 0 }
1800  };
1801  while ((c = getopt_long(argc, argv, "b:c:F:gI:lmp:P:vw:", long_options, NULL))
1802	 != EOF)
1803    switch(c) {
1804    case 'b':
1805      // XXX check this
1806      broken_flags = atoi(optarg);
1807      bflag = 1;
1808      break;
1809    case 'c':
1810      if (sscanf(optarg, "%d", &ncopies) != 1 || ncopies <= 0) {
1811	error("bad number of copies `%s'", optarg);
1812	ncopies = 1;
1813      }
1814      break;
1815    case 'F':
1816      font::command_line_font_dir(optarg);
1817      break;
1818    case 'g':
1819      guess_flag = 1;
1820      break;
1821    case 'I':
1822      include_search_path.command_line_dir(optarg);
1823      break;
1824    case 'l':
1825      landscape_flag = 1;
1826      break;
1827    case 'm':
1828      manual_feed_flag = 1;
1829      break;
1830    case 'p':
1831      if (!font::scan_papersize(optarg, 0,
1832				&user_paper_length, &user_paper_width))
1833	error("invalid custom paper size `%1' ignored", optarg);
1834      break;
1835    case 'P':
1836      env = "GROPS_PROLOGUE";
1837      env += '=';
1838      env += optarg;
1839      env += '\0';
1840      if (putenv(strsave(env.contents())))
1841	fatal("putenv failed");
1842      break;
1843    case 'v':
1844      printf("GNU grops (groff) version %s\n", Version_string);
1845      exit(0);
1846      break;
1847    case 'w':
1848      if (sscanf(optarg, "%d", &linewidth) != 1 || linewidth < 0) {
1849	error("bad linewidth `%1'", optarg);
1850	linewidth = -1;
1851      }
1852      break;
1853    case CHAR_MAX + 1: // --help
1854      usage(stdout);
1855      exit(0);
1856      break;
1857    case '?':
1858      usage(stderr);
1859      exit(1);
1860      break;
1861    default:
1862      assert(0);
1863    }
1864  font::set_unknown_desc_command_handler(handle_unknown_desc_command);
1865  SET_BINARY(fileno(stdout));
1866  if (optind >= argc)
1867    do_file("-");
1868  else {
1869    for (int i = optind; i < argc; i++)
1870      do_file(argv[i]);
1871  }
1872  return 0;
1873}
1874
1875static void usage(FILE *stream)
1876{
1877  fprintf(stream,
1878"usage: %s [-glmv] [-b n] [-c n] [-w n] [-I dir] [-P prologue]\n"
1879"       [-F dir] [files ...]\n",
1880    program_name);
1881}
1882