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Handle output encoding for unicode, numbered and named escape sequences
[mandoc.git] / mdoc_man.c
1 /* $Id: mdoc_man.c,v 1.70 2014/08/21 12:57:17 schwarze Exp $ */
2 /*
3 * Copyright (c) 2011, 2012, 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17 #include "config.h"
18
19 #include <sys/types.h>
20
21 #include <assert.h>
22 #include <stdio.h>
23 #include <string.h>
24
25 #include "mandoc.h"
26 #include "mandoc_aux.h"
27 #include "out.h"
28 #include "man.h"
29 #include "mdoc.h"
30 #include "main.h"
31
32 #define DECL_ARGS const struct mdoc_meta *meta, \
33 const struct mdoc_node *n
34
35 struct manact {
36 int (*cond)(DECL_ARGS); /* DON'T run actions */
37 int (*pre)(DECL_ARGS); /* pre-node action */
38 void (*post)(DECL_ARGS); /* post-node action */
39 const char *prefix; /* pre-node string constant */
40 const char *suffix; /* post-node string constant */
41 };
42
43 static int cond_body(DECL_ARGS);
44 static int cond_head(DECL_ARGS);
45 static void font_push(char);
46 static void font_pop(void);
47 static void mid_it(void);
48 static void post__t(DECL_ARGS);
49 static void post_bd(DECL_ARGS);
50 static void post_bf(DECL_ARGS);
51 static void post_bk(DECL_ARGS);
52 static void post_bl(DECL_ARGS);
53 static void post_dl(DECL_ARGS);
54 static void post_en(DECL_ARGS);
55 static void post_enc(DECL_ARGS);
56 static void post_eo(DECL_ARGS);
57 static void post_fa(DECL_ARGS);
58 static void post_fd(DECL_ARGS);
59 static void post_fl(DECL_ARGS);
60 static void post_fn(DECL_ARGS);
61 static void post_fo(DECL_ARGS);
62 static void post_font(DECL_ARGS);
63 static void post_in(DECL_ARGS);
64 static void post_it(DECL_ARGS);
65 static void post_lb(DECL_ARGS);
66 static void post_nm(DECL_ARGS);
67 static void post_percent(DECL_ARGS);
68 static void post_pf(DECL_ARGS);
69 static void post_sect(DECL_ARGS);
70 static void post_sp(DECL_ARGS);
71 static void post_vt(DECL_ARGS);
72 static int pre__t(DECL_ARGS);
73 static int pre_an(DECL_ARGS);
74 static int pre_ap(DECL_ARGS);
75 static int pre_bd(DECL_ARGS);
76 static int pre_bf(DECL_ARGS);
77 static int pre_bk(DECL_ARGS);
78 static int pre_bl(DECL_ARGS);
79 static int pre_br(DECL_ARGS);
80 static int pre_bx(DECL_ARGS);
81 static int pre_dl(DECL_ARGS);
82 static int pre_en(DECL_ARGS);
83 static int pre_enc(DECL_ARGS);
84 static int pre_em(DECL_ARGS);
85 static int pre_es(DECL_ARGS);
86 static int pre_ex(DECL_ARGS);
87 static int pre_fa(DECL_ARGS);
88 static int pre_fd(DECL_ARGS);
89 static int pre_fl(DECL_ARGS);
90 static int pre_fn(DECL_ARGS);
91 static int pre_fo(DECL_ARGS);
92 static int pre_ft(DECL_ARGS);
93 static int pre_in(DECL_ARGS);
94 static int pre_it(DECL_ARGS);
95 static int pre_lk(DECL_ARGS);
96 static int pre_li(DECL_ARGS);
97 static int pre_ll(DECL_ARGS);
98 static int pre_nm(DECL_ARGS);
99 static int pre_no(DECL_ARGS);
100 static int pre_ns(DECL_ARGS);
101 static int pre_pp(DECL_ARGS);
102 static int pre_rs(DECL_ARGS);
103 static int pre_rv(DECL_ARGS);
104 static int pre_sm(DECL_ARGS);
105 static int pre_sp(DECL_ARGS);
106 static int pre_sect(DECL_ARGS);
107 static int pre_sy(DECL_ARGS);
108 static void pre_syn(const struct mdoc_node *);
109 static int pre_vt(DECL_ARGS);
110 static int pre_ux(DECL_ARGS);
111 static int pre_xr(DECL_ARGS);
112 static void print_word(const char *);
113 static void print_line(const char *, int);
114 static void print_block(const char *, int);
115 static void print_offs(const char *);
116 static void print_width(const char *,
117 const struct mdoc_node *, size_t);
118 static void print_count(int *);
119 static void print_node(DECL_ARGS);
120
121 static const struct manact manacts[MDOC_MAX + 1] = {
122 { NULL, pre_ap, NULL, NULL, NULL }, /* Ap */
123 { NULL, NULL, NULL, NULL, NULL }, /* Dd */
124 { NULL, NULL, NULL, NULL, NULL }, /* Dt */
125 { NULL, NULL, NULL, NULL, NULL }, /* Os */
126 { NULL, pre_sect, post_sect, ".SH", NULL }, /* Sh */
127 { NULL, pre_sect, post_sect, ".SS", NULL }, /* Ss */
128 { NULL, pre_pp, NULL, NULL, NULL }, /* Pp */
129 { cond_body, pre_dl, post_dl, NULL, NULL }, /* D1 */
130 { cond_body, pre_dl, post_dl, NULL, NULL }, /* Dl */
131 { cond_body, pre_bd, post_bd, NULL, NULL }, /* Bd */
132 { NULL, NULL, NULL, NULL, NULL }, /* Ed */
133 { cond_body, pre_bl, post_bl, NULL, NULL }, /* Bl */
134 { NULL, NULL, NULL, NULL, NULL }, /* El */
135 { NULL, pre_it, post_it, NULL, NULL }, /* It */
136 { NULL, pre_em, post_font, NULL, NULL }, /* Ad */
137 { NULL, pre_an, NULL, NULL, NULL }, /* An */
138 { NULL, pre_em, post_font, NULL, NULL }, /* Ar */
139 { NULL, pre_sy, post_font, NULL, NULL }, /* Cd */
140 { NULL, pre_sy, post_font, NULL, NULL }, /* Cm */
141 { NULL, pre_li, post_font, NULL, NULL }, /* Dv */
142 { NULL, pre_li, post_font, NULL, NULL }, /* Er */
143 { NULL, pre_li, post_font, NULL, NULL }, /* Ev */
144 { NULL, pre_ex, NULL, NULL, NULL }, /* Ex */
145 { NULL, pre_fa, post_fa, NULL, NULL }, /* Fa */
146 { NULL, pre_fd, post_fd, NULL, NULL }, /* Fd */
147 { NULL, pre_fl, post_fl, NULL, NULL }, /* Fl */
148 { NULL, pre_fn, post_fn, NULL, NULL }, /* Fn */
149 { NULL, pre_ft, post_font, NULL, NULL }, /* Ft */
150 { NULL, pre_sy, post_font, NULL, NULL }, /* Ic */
151 { NULL, pre_in, post_in, NULL, NULL }, /* In */
152 { NULL, pre_li, post_font, NULL, NULL }, /* Li */
153 { cond_head, pre_enc, NULL, "\\- ", NULL }, /* Nd */
154 { NULL, pre_nm, post_nm, NULL, NULL }, /* Nm */
155 { cond_body, pre_enc, post_enc, "[", "]" }, /* Op */
156 { NULL, pre_ft, post_font, NULL, NULL }, /* Ot */
157 { NULL, pre_em, post_font, NULL, NULL }, /* Pa */
158 { NULL, pre_rv, NULL, NULL, NULL }, /* Rv */
159 { NULL, NULL, NULL, NULL, NULL }, /* St */
160 { NULL, pre_em, post_font, NULL, NULL }, /* Va */
161 { NULL, pre_vt, post_vt, NULL, NULL }, /* Vt */
162 { NULL, pre_xr, NULL, NULL, NULL }, /* Xr */
163 { NULL, NULL, post_percent, NULL, NULL }, /* %A */
164 { NULL, pre_em, post_percent, NULL, NULL }, /* %B */
165 { NULL, NULL, post_percent, NULL, NULL }, /* %D */
166 { NULL, pre_em, post_percent, NULL, NULL }, /* %I */
167 { NULL, pre_em, post_percent, NULL, NULL }, /* %J */
168 { NULL, NULL, post_percent, NULL, NULL }, /* %N */
169 { NULL, NULL, post_percent, NULL, NULL }, /* %O */
170 { NULL, NULL, post_percent, NULL, NULL }, /* %P */
171 { NULL, NULL, post_percent, NULL, NULL }, /* %R */
172 { NULL, pre__t, post__t, NULL, NULL }, /* %T */
173 { NULL, NULL, post_percent, NULL, NULL }, /* %V */
174 { NULL, NULL, NULL, NULL, NULL }, /* Ac */
175 { cond_body, pre_enc, post_enc, "<", ">" }, /* Ao */
176 { cond_body, pre_enc, post_enc, "<", ">" }, /* Aq */
177 { NULL, NULL, NULL, NULL, NULL }, /* At */
178 { NULL, NULL, NULL, NULL, NULL }, /* Bc */
179 { NULL, pre_bf, post_bf, NULL, NULL }, /* Bf */
180 { cond_body, pre_enc, post_enc, "[", "]" }, /* Bo */
181 { cond_body, pre_enc, post_enc, "[", "]" }, /* Bq */
182 { NULL, pre_ux, NULL, "BSD/OS", NULL }, /* Bsx */
183 { NULL, pre_bx, NULL, NULL, NULL }, /* Bx */
184 { NULL, NULL, NULL, NULL, NULL }, /* Db */
185 { NULL, NULL, NULL, NULL, NULL }, /* Dc */
186 { cond_body, pre_enc, post_enc, "\\(lq", "\\(rq" }, /* Do */
187 { cond_body, pre_enc, post_enc, "\\(lq", "\\(rq" }, /* Dq */
188 { NULL, NULL, NULL, NULL, NULL }, /* Ec */
189 { NULL, NULL, NULL, NULL, NULL }, /* Ef */
190 { NULL, pre_em, post_font, NULL, NULL }, /* Em */
191 { NULL, NULL, post_eo, NULL, NULL }, /* Eo */
192 { NULL, pre_ux, NULL, "FreeBSD", NULL }, /* Fx */
193 { NULL, pre_sy, post_font, NULL, NULL }, /* Ms */
194 { NULL, pre_no, NULL, NULL, NULL }, /* No */
195 { NULL, pre_ns, NULL, NULL, NULL }, /* Ns */
196 { NULL, pre_ux, NULL, "NetBSD", NULL }, /* Nx */
197 { NULL, pre_ux, NULL, "OpenBSD", NULL }, /* Ox */
198 { NULL, NULL, NULL, NULL, NULL }, /* Pc */
199 { NULL, NULL, post_pf, NULL, NULL }, /* Pf */
200 { cond_body, pre_enc, post_enc, "(", ")" }, /* Po */
201 { cond_body, pre_enc, post_enc, "(", ")" }, /* Pq */
202 { NULL, NULL, NULL, NULL, NULL }, /* Qc */
203 { cond_body, pre_enc, post_enc, "\\(oq", "\\(cq" }, /* Ql */
204 { cond_body, pre_enc, post_enc, "\"", "\"" }, /* Qo */
205 { cond_body, pre_enc, post_enc, "\"", "\"" }, /* Qq */
206 { NULL, NULL, NULL, NULL, NULL }, /* Re */
207 { cond_body, pre_rs, NULL, NULL, NULL }, /* Rs */
208 { NULL, NULL, NULL, NULL, NULL }, /* Sc */
209 { cond_body, pre_enc, post_enc, "\\(oq", "\\(cq" }, /* So */
210 { cond_body, pre_enc, post_enc, "\\(oq", "\\(cq" }, /* Sq */
211 { NULL, pre_sm, NULL, NULL, NULL }, /* Sm */
212 { NULL, pre_em, post_font, NULL, NULL }, /* Sx */
213 { NULL, pre_sy, post_font, NULL, NULL }, /* Sy */
214 { NULL, pre_li, post_font, NULL, NULL }, /* Tn */
215 { NULL, pre_ux, NULL, "UNIX", NULL }, /* Ux */
216 { NULL, NULL, NULL, NULL, NULL }, /* Xc */
217 { NULL, NULL, NULL, NULL, NULL }, /* Xo */
218 { NULL, pre_fo, post_fo, NULL, NULL }, /* Fo */
219 { NULL, NULL, NULL, NULL, NULL }, /* Fc */
220 { cond_body, pre_enc, post_enc, "[", "]" }, /* Oo */
221 { NULL, NULL, NULL, NULL, NULL }, /* Oc */
222 { NULL, pre_bk, post_bk, NULL, NULL }, /* Bk */
223 { NULL, NULL, NULL, NULL, NULL }, /* Ek */
224 { NULL, pre_ux, NULL, "is currently in beta test.", NULL }, /* Bt */
225 { NULL, NULL, NULL, NULL, NULL }, /* Hf */
226 { NULL, pre_em, post_font, NULL, NULL }, /* Fr */
227 { NULL, pre_ux, NULL, "currently under development.", NULL }, /* Ud */
228 { NULL, NULL, post_lb, NULL, NULL }, /* Lb */
229 { NULL, pre_pp, NULL, NULL, NULL }, /* Lp */
230 { NULL, pre_lk, NULL, NULL, NULL }, /* Lk */
231 { NULL, pre_em, post_font, NULL, NULL }, /* Mt */
232 { cond_body, pre_enc, post_enc, "{", "}" }, /* Brq */
233 { cond_body, pre_enc, post_enc, "{", "}" }, /* Bro */
234 { NULL, NULL, NULL, NULL, NULL }, /* Brc */
235 { NULL, NULL, post_percent, NULL, NULL }, /* %C */
236 { NULL, pre_es, NULL, NULL, NULL }, /* Es */
237 { cond_body, pre_en, post_en, NULL, NULL }, /* En */
238 { NULL, pre_ux, NULL, "DragonFly", NULL }, /* Dx */
239 { NULL, NULL, post_percent, NULL, NULL }, /* %Q */
240 { NULL, pre_br, NULL, NULL, NULL }, /* br */
241 { NULL, pre_sp, post_sp, NULL, NULL }, /* sp */
242 { NULL, NULL, post_percent, NULL, NULL }, /* %U */
243 { NULL, NULL, NULL, NULL, NULL }, /* Ta */
244 { NULL, pre_ll, post_sp, NULL, NULL }, /* ll */
245 { NULL, NULL, NULL, NULL, NULL }, /* ROOT */
246 };
247
248 static int outflags;
249 #define MMAN_spc (1 << 0) /* blank character before next word */
250 #define MMAN_spc_force (1 << 1) /* even before trailing punctuation */
251 #define MMAN_nl (1 << 2) /* break man(7) code line */
252 #define MMAN_br (1 << 3) /* break output line */
253 #define MMAN_sp (1 << 4) /* insert a blank output line */
254 #define MMAN_PP (1 << 5) /* reset indentation etc. */
255 #define MMAN_Sm (1 << 6) /* horizontal spacing mode */
256 #define MMAN_Bk (1 << 7) /* word keep mode */
257 #define MMAN_Bk_susp (1 << 8) /* suspend this (after a macro) */
258 #define MMAN_An_split (1 << 9) /* author mode is "split" */
259 #define MMAN_An_nosplit (1 << 10) /* author mode is "nosplit" */
260 #define MMAN_PD (1 << 11) /* inter-paragraph spacing disabled */
261 #define MMAN_nbrword (1 << 12) /* do not break the next word */
262
263 #define BL_STACK_MAX 32
264
265 static size_t Bl_stack[BL_STACK_MAX]; /* offsets [chars] */
266 static int Bl_stack_post[BL_STACK_MAX]; /* add final .RE */
267 static int Bl_stack_len; /* number of nested Bl blocks */
268 static int TPremain; /* characters before tag is full */
269
270 static struct {
271 char *head;
272 char *tail;
273 size_t size;
274 } fontqueue;
275
276
277 static void
278 font_push(char newfont)
279 {
280
281 if (fontqueue.head + fontqueue.size <= ++fontqueue.tail) {
282 fontqueue.size += 8;
283 fontqueue.head = mandoc_realloc(fontqueue.head,
284 fontqueue.size);
285 }
286 *fontqueue.tail = newfont;
287 print_word("");
288 printf("\\f");
289 putchar(newfont);
290 outflags &= ~MMAN_spc;
291 }
292
293 static void
294 font_pop(void)
295 {
296
297 if (fontqueue.tail > fontqueue.head)
298 fontqueue.tail--;
299 outflags &= ~MMAN_spc;
300 print_word("");
301 printf("\\f");
302 putchar(*fontqueue.tail);
303 }
304
305 static void
306 print_word(const char *s)
307 {
308
309 if ((MMAN_PP | MMAN_sp | MMAN_br | MMAN_nl) & outflags) {
310 /*
311 * If we need a newline, print it now and start afresh.
312 */
313 if (MMAN_PP & outflags) {
314 if (MMAN_sp & outflags) {
315 if (MMAN_PD & outflags) {
316 printf("\n.PD");
317 outflags &= ~MMAN_PD;
318 }
319 } else if ( ! (MMAN_PD & outflags)) {
320 printf("\n.PD 0");
321 outflags |= MMAN_PD;
322 }
323 printf("\n.PP\n");
324 } else if (MMAN_sp & outflags)
325 printf("\n.sp\n");
326 else if (MMAN_br & outflags)
327 printf("\n.br\n");
328 else if (MMAN_nl & outflags)
329 putchar('\n');
330 outflags &= ~(MMAN_PP|MMAN_sp|MMAN_br|MMAN_nl|MMAN_spc);
331 if (1 == TPremain)
332 printf(".br\n");
333 TPremain = 0;
334 } else if (MMAN_spc & outflags) {
335 /*
336 * If we need a space, only print it if
337 * (1) it is forced by `No' or
338 * (2) what follows is not terminating punctuation or
339 * (3) what follows is longer than one character.
340 */
341 if (MMAN_spc_force & outflags || '\0' == s[0] ||
342 NULL == strchr(".,:;)]?!", s[0]) || '\0' != s[1]) {
343 if (MMAN_Bk & outflags &&
344 ! (MMAN_Bk_susp & outflags))
345 putchar('\\');
346 putchar(' ');
347 if (TPremain)
348 TPremain--;
349 }
350 }
351
352 /*
353 * Reassign needing space if we're not following opening
354 * punctuation.
355 */
356 if (MMAN_Sm & outflags && ('\0' == s[0] ||
357 (('(' != s[0] && '[' != s[0]) || '\0' != s[1])))
358 outflags |= MMAN_spc;
359 else
360 outflags &= ~MMAN_spc;
361 outflags &= ~(MMAN_spc_force | MMAN_Bk_susp);
362
363 for ( ; *s; s++) {
364 switch (*s) {
365 case ASCII_NBRSP:
366 printf("\\ ");
367 break;
368 case ASCII_HYPH:
369 putchar('-');
370 break;
371 case ASCII_BREAK:
372 printf("\\:");
373 break;
374 case ' ':
375 if (MMAN_nbrword & outflags) {
376 printf("\\ ");
377 break;
378 }
379 /* FALLTHROUGH */
380 default:
381 putchar((unsigned char)*s);
382 break;
383 }
384 if (TPremain)
385 TPremain--;
386 }
387 outflags &= ~MMAN_nbrword;
388 }
389
390 static void
391 print_line(const char *s, int newflags)
392 {
393
394 outflags &= ~MMAN_br;
395 outflags |= MMAN_nl;
396 print_word(s);
397 outflags |= newflags;
398 }
399
400 static void
401 print_block(const char *s, int newflags)
402 {
403
404 outflags &= ~MMAN_PP;
405 if (MMAN_sp & outflags) {
406 outflags &= ~(MMAN_sp | MMAN_br);
407 if (MMAN_PD & outflags) {
408 print_line(".PD", 0);
409 outflags &= ~MMAN_PD;
410 }
411 } else if (! (MMAN_PD & outflags))
412 print_line(".PD 0", MMAN_PD);
413 outflags |= MMAN_nl;
414 print_word(s);
415 outflags |= MMAN_Bk_susp | newflags;
416 }
417
418 static void
419 print_offs(const char *v)
420 {
421 char buf[24];
422 struct roffsu su;
423 size_t sz;
424
425 print_line(".RS", MMAN_Bk_susp);
426
427 /* Convert v into a number (of characters). */
428 if (NULL == v || '\0' == *v || 0 == strcmp(v, "left"))
429 sz = 0;
430 else if (0 == strcmp(v, "indent"))
431 sz = 6;
432 else if (0 == strcmp(v, "indent-two"))
433 sz = 12;
434 else if (a2roffsu(v, &su, SCALE_MAX)) {
435 if (SCALE_EN == su.unit)
436 sz = su.scale;
437 else {
438 /*
439 * XXX
440 * If we are inside an enclosing list,
441 * there is no easy way to add the two
442 * indentations because they are provided
443 * in terms of different units.
444 */
445 print_word(v);
446 outflags |= MMAN_nl;
447 return;
448 }
449 } else
450 sz = strlen(v);
451
452 /*
453 * We are inside an enclosing list.
454 * Add the two indentations.
455 */
456 if (Bl_stack_len)
457 sz += Bl_stack[Bl_stack_len - 1];
458
459 (void)snprintf(buf, sizeof(buf), "%zun", sz);
460 print_word(buf);
461 outflags |= MMAN_nl;
462 }
463
464 /*
465 * Set up the indentation for a list item; used from pre_it().
466 */
467 static void
468 print_width(const char *v, const struct mdoc_node *child, size_t defsz)
469 {
470 char buf[24];
471 struct roffsu su;
472 size_t sz, chsz;
473 int numeric, remain;
474
475 numeric = 1;
476 remain = 0;
477
478 /* Convert v into a number (of characters). */
479 if (NULL == v)
480 sz = defsz;
481 else if (a2roffsu(v, &su, SCALE_MAX)) {
482 if (SCALE_EN == su.unit)
483 sz = su.scale;
484 else {
485 sz = 0;
486 numeric = 0;
487 }
488 } else
489 sz = strlen(v);
490
491 /* XXX Rough estimation, might have multiple parts. */
492 chsz = (NULL != child && MDOC_TEXT == child->type) ?
493 strlen(child->string) : 0;
494
495 /* Maybe we are inside an enclosing list? */
496 mid_it();
497
498 /*
499 * Save our own indentation,
500 * such that child lists can use it.
501 */
502 Bl_stack[Bl_stack_len++] = sz + 2;
503
504 /* Set up the current list. */
505 if (defsz && chsz > sz)
506 print_block(".HP", 0);
507 else {
508 print_block(".TP", 0);
509 remain = sz + 2;
510 }
511 if (numeric) {
512 (void)snprintf(buf, sizeof(buf), "%zun", sz + 2);
513 print_word(buf);
514 } else
515 print_word(v);
516 TPremain = remain;
517 }
518
519 static void
520 print_count(int *count)
521 {
522 char buf[24];
523
524 (void)snprintf(buf, sizeof(buf), "%d.", ++*count);
525 print_word(buf);
526 }
527
528 void
529 man_man(void *arg, const struct man *man)
530 {
531
532 /*
533 * Dump the keep buffer.
534 * We're guaranteed by now that this exists (is non-NULL).
535 * Flush stdout afterward, just in case.
536 */
537 fputs(mparse_getkeep(man_mparse(man)), stdout);
538 fflush(stdout);
539 }
540
541 void
542 man_mdoc(void *arg, const struct mdoc *mdoc)
543 {
544 const struct mdoc_meta *meta;
545 const struct mdoc_node *n;
546
547 meta = mdoc_meta(mdoc);
548 n = mdoc_node(mdoc);
549
550 printf(".TH \"%s\" \"%s\" \"%s\" \"%s\" \"%s\"\n",
551 meta->title,
552 (meta->msec == NULL ? "" : meta->msec),
553 meta->date, meta->os, meta->vol);
554
555 /* Disable hyphenation and if nroff, disable justification. */
556 printf(".nh\n.if n .ad l");
557
558 outflags = MMAN_nl | MMAN_Sm;
559 if (0 == fontqueue.size) {
560 fontqueue.size = 8;
561 fontqueue.head = fontqueue.tail = mandoc_malloc(8);
562 *fontqueue.tail = 'R';
563 }
564 print_node(meta, n);
565 putchar('\n');
566 }
567
568 static void
569 print_node(DECL_ARGS)
570 {
571 const struct mdoc_node *sub;
572 const struct manact *act;
573 int cond, do_sub;
574
575 /*
576 * Break the line if we were parsed subsequent the current node.
577 * This makes the page structure be more consistent.
578 */
579 if (MMAN_spc & outflags && MDOC_LINE & n->flags)
580 outflags |= MMAN_nl;
581
582 act = NULL;
583 cond = 0;
584 do_sub = 1;
585
586 if (MDOC_TEXT == n->type) {
587 /*
588 * Make sure that we don't happen to start with a
589 * control character at the start of a line.
590 */
591 if (MMAN_nl & outflags &&
592 ('.' == *n->string || '\'' == *n->string)) {
593 print_word("");
594 printf("\\&");
595 outflags &= ~MMAN_spc;
596 }
597 print_word(n->string);
598 } else {
599 /*
600 * Conditionally run the pre-node action handler for a
601 * node.
602 */
603 act = manacts + n->tok;
604 cond = NULL == act->cond || (*act->cond)(meta, n);
605 if (cond && act->pre && ENDBODY_NOT == n->end)
606 do_sub = (*act->pre)(meta, n);
607 }
608
609 /*
610 * Conditionally run all child nodes.
611 * Note that this iterates over children instead of using
612 * recursion. This prevents unnecessary depth in the stack.
613 */
614 if (do_sub)
615 for (sub = n->child; sub; sub = sub->next)
616 print_node(meta, sub);
617
618 /*
619 * Lastly, conditionally run the post-node handler.
620 */
621 if (MDOC_ENDED & n->flags)
622 return;
623
624 if (cond && act->post)
625 (*act->post)(meta, n);
626
627 if (ENDBODY_NOT != n->end)
628 n->pending->flags |= MDOC_ENDED;
629
630 if (ENDBODY_NOSPACE == n->end)
631 outflags &= ~(MMAN_spc | MMAN_nl);
632 }
633
634 static int
635 cond_head(DECL_ARGS)
636 {
637
638 return(MDOC_HEAD == n->type);
639 }
640
641 static int
642 cond_body(DECL_ARGS)
643 {
644
645 return(MDOC_BODY == n->type);
646 }
647
648 static int
649 pre_enc(DECL_ARGS)
650 {
651 const char *prefix;
652
653 prefix = manacts[n->tok].prefix;
654 if (NULL == prefix)
655 return(1);
656 print_word(prefix);
657 outflags &= ~MMAN_spc;
658 return(1);
659 }
660
661 static void
662 post_enc(DECL_ARGS)
663 {
664 const char *suffix;
665
666 suffix = manacts[n->tok].suffix;
667 if (NULL == suffix)
668 return;
669 outflags &= ~(MMAN_spc | MMAN_nl);
670 print_word(suffix);
671 }
672
673 static int
674 pre_ex(DECL_ARGS)
675 {
676 int nchild;
677
678 outflags |= MMAN_br | MMAN_nl;
679
680 print_word("The");
681
682 nchild = n->nchild;
683 for (n = n->child; n; n = n->next) {
684 font_push('B');
685 print_word(n->string);
686 font_pop();
687
688 if (n->next == NULL)
689 continue;
690
691 if (nchild > 2) {
692 outflags &= ~MMAN_spc;
693 print_word(",");
694 }
695 if (n->next->next == NULL)
696 print_word("and");
697 }
698
699 if (nchild > 1)
700 print_word("utilities exit\\~0");
701 else
702 print_word("utility exits\\~0");
703
704 print_word("on success, and\\~>0 if an error occurs.");
705 outflags |= MMAN_nl;
706 return(0);
707 }
708
709 static void
710 post_font(DECL_ARGS)
711 {
712
713 font_pop();
714 }
715
716 static void
717 post_percent(DECL_ARGS)
718 {
719
720 if (pre_em == manacts[n->tok].pre)
721 font_pop();
722 if (n->next) {
723 print_word(",");
724 if (n->prev && n->prev->tok == n->tok &&
725 n->next->tok == n->tok)
726 print_word("and");
727 } else {
728 print_word(".");
729 outflags |= MMAN_nl;
730 }
731 }
732
733 static int
734 pre__t(DECL_ARGS)
735 {
736
737 if (n->parent && MDOC_Rs == n->parent->tok &&
738 n->parent->norm->Rs.quote_T) {
739 print_word("");
740 putchar('\"');
741 outflags &= ~MMAN_spc;
742 } else
743 font_push('I');
744 return(1);
745 }
746
747 static void
748 post__t(DECL_ARGS)
749 {
750
751 if (n->parent && MDOC_Rs == n->parent->tok &&
752 n->parent->norm->Rs.quote_T) {
753 outflags &= ~MMAN_spc;
754 print_word("");
755 putchar('\"');
756 } else
757 font_pop();
758 post_percent(meta, n);
759 }
760
761 /*
762 * Print before a section header.
763 */
764 static int
765 pre_sect(DECL_ARGS)
766 {
767
768 if (MDOC_HEAD == n->type) {
769 outflags |= MMAN_sp;
770 print_block(manacts[n->tok].prefix, 0);
771 print_word("");
772 putchar('\"');
773 outflags &= ~MMAN_spc;
774 }
775 return(1);
776 }
777
778 /*
779 * Print subsequent a section header.
780 */
781 static void
782 post_sect(DECL_ARGS)
783 {
784
785 if (MDOC_HEAD != n->type)
786 return;
787 outflags &= ~MMAN_spc;
788 print_word("");
789 putchar('\"');
790 outflags |= MMAN_nl;
791 if (MDOC_Sh == n->tok && SEC_AUTHORS == n->sec)
792 outflags &= ~(MMAN_An_split | MMAN_An_nosplit);
793 }
794
795 /* See mdoc_term.c, synopsis_pre() for comments. */
796 static void
797 pre_syn(const struct mdoc_node *n)
798 {
799
800 if (NULL == n->prev || ! (MDOC_SYNPRETTY & n->flags))
801 return;
802
803 if (n->prev->tok == n->tok &&
804 MDOC_Ft != n->tok &&
805 MDOC_Fo != n->tok &&
806 MDOC_Fn != n->tok) {
807 outflags |= MMAN_br;
808 return;
809 }
810
811 switch (n->prev->tok) {
812 case MDOC_Fd:
813 /* FALLTHROUGH */
814 case MDOC_Fn:
815 /* FALLTHROUGH */
816 case MDOC_Fo:
817 /* FALLTHROUGH */
818 case MDOC_In:
819 /* FALLTHROUGH */
820 case MDOC_Vt:
821 outflags |= MMAN_sp;
822 break;
823 case MDOC_Ft:
824 if (MDOC_Fn != n->tok && MDOC_Fo != n->tok) {
825 outflags |= MMAN_sp;
826 break;
827 }
828 /* FALLTHROUGH */
829 default:
830 outflags |= MMAN_br;
831 break;
832 }
833 }
834
835 static int
836 pre_an(DECL_ARGS)
837 {
838
839 switch (n->norm->An.auth) {
840 case AUTH_split:
841 outflags &= ~MMAN_An_nosplit;
842 outflags |= MMAN_An_split;
843 return(0);
844 case AUTH_nosplit:
845 outflags &= ~MMAN_An_split;
846 outflags |= MMAN_An_nosplit;
847 return(0);
848 default:
849 if (MMAN_An_split & outflags)
850 outflags |= MMAN_br;
851 else if (SEC_AUTHORS == n->sec &&
852 ! (MMAN_An_nosplit & outflags))
853 outflags |= MMAN_An_split;
854 return(1);
855 }
856 }
857
858 static int
859 pre_ap(DECL_ARGS)
860 {
861
862 outflags &= ~MMAN_spc;
863 print_word("'");
864 outflags &= ~MMAN_spc;
865 return(0);
866 }
867
868 static int
869 pre_bd(DECL_ARGS)
870 {
871
872 outflags &= ~(MMAN_PP | MMAN_sp | MMAN_br);
873
874 if (DISP_unfilled == n->norm->Bd.type ||
875 DISP_literal == n->norm->Bd.type)
876 print_line(".nf", 0);
877 if (0 == n->norm->Bd.comp && NULL != n->parent->prev)
878 outflags |= MMAN_sp;
879 print_offs(n->norm->Bd.offs);
880 return(1);
881 }
882
883 static void
884 post_bd(DECL_ARGS)
885 {
886
887 /* Close out this display. */
888 print_line(".RE", MMAN_nl);
889 if (DISP_unfilled == n->norm->Bd.type ||
890 DISP_literal == n->norm->Bd.type)
891 print_line(".fi", MMAN_nl);
892
893 /* Maybe we are inside an enclosing list? */
894 if (NULL != n->parent->next)
895 mid_it();
896 }
897
898 static int
899 pre_bf(DECL_ARGS)
900 {
901
902 switch (n->type) {
903 case MDOC_BLOCK:
904 return(1);
905 case MDOC_BODY:
906 break;
907 default:
908 return(0);
909 }
910 switch (n->norm->Bf.font) {
911 case FONT_Em:
912 font_push('I');
913 break;
914 case FONT_Sy:
915 font_push('B');
916 break;
917 default:
918 font_push('R');
919 break;
920 }
921 return(1);
922 }
923
924 static void
925 post_bf(DECL_ARGS)
926 {
927
928 if (MDOC_BODY == n->type)
929 font_pop();
930 }
931
932 static int
933 pre_bk(DECL_ARGS)
934 {
935
936 switch (n->type) {
937 case MDOC_BLOCK:
938 return(1);
939 case MDOC_BODY:
940 outflags |= MMAN_Bk;
941 return(1);
942 default:
943 return(0);
944 }
945 }
946
947 static void
948 post_bk(DECL_ARGS)
949 {
950
951 if (MDOC_BODY == n->type)
952 outflags &= ~MMAN_Bk;
953 }
954
955 static int
956 pre_bl(DECL_ARGS)
957 {
958 size_t icol;
959
960 /*
961 * print_offs() will increase the -offset to account for
962 * a possible enclosing .It, but any enclosed .It blocks
963 * just nest and do not add up their indentation.
964 */
965 if (n->norm->Bl.offs) {
966 print_offs(n->norm->Bl.offs);
967 Bl_stack[Bl_stack_len++] = 0;
968 }
969
970 switch (n->norm->Bl.type) {
971 case LIST_enum:
972 n->norm->Bl.count = 0;
973 return(1);
974 case LIST_column:
975 break;
976 default:
977 return(1);
978 }
979
980 print_line(".TS", MMAN_nl);
981 for (icol = 0; icol < n->norm->Bl.ncols; icol++)
982 print_word("l");
983 print_word(".");
984 outflags |= MMAN_nl;
985 return(1);
986 }
987
988 static void
989 post_bl(DECL_ARGS)
990 {
991
992 switch (n->norm->Bl.type) {
993 case LIST_column:
994 print_line(".TE", 0);
995 break;
996 case LIST_enum:
997 n->norm->Bl.count = 0;
998 break;
999 default:
1000 break;
1001 }
1002
1003 if (n->norm->Bl.offs) {
1004 print_line(".RE", MMAN_nl);
1005 assert(Bl_stack_len);
1006 Bl_stack_len--;
1007 assert(0 == Bl_stack[Bl_stack_len]);
1008 } else {
1009 outflags |= MMAN_PP | MMAN_nl;
1010 outflags &= ~(MMAN_sp | MMAN_br);
1011 }
1012
1013 /* Maybe we are inside an enclosing list? */
1014 if (NULL != n->parent->next)
1015 mid_it();
1016
1017 }
1018
1019 static int
1020 pre_br(DECL_ARGS)
1021 {
1022
1023 outflags |= MMAN_br;
1024 return(0);
1025 }
1026
1027 static int
1028 pre_bx(DECL_ARGS)
1029 {
1030
1031 n = n->child;
1032 if (n) {
1033 print_word(n->string);
1034 outflags &= ~MMAN_spc;
1035 n = n->next;
1036 }
1037 print_word("BSD");
1038 if (NULL == n)
1039 return(0);
1040 outflags &= ~MMAN_spc;
1041 print_word("-");
1042 outflags &= ~MMAN_spc;
1043 print_word(n->string);
1044 return(0);
1045 }
1046
1047 static int
1048 pre_dl(DECL_ARGS)
1049 {
1050
1051 print_offs("6n");
1052 return(1);
1053 }
1054
1055 static void
1056 post_dl(DECL_ARGS)
1057 {
1058
1059 print_line(".RE", MMAN_nl);
1060
1061 /* Maybe we are inside an enclosing list? */
1062 if (NULL != n->parent->next)
1063 mid_it();
1064 }
1065
1066 static int
1067 pre_em(DECL_ARGS)
1068 {
1069
1070 font_push('I');
1071 return(1);
1072 }
1073
1074 static int
1075 pre_en(DECL_ARGS)
1076 {
1077
1078 if (NULL == n->norm->Es ||
1079 NULL == n->norm->Es->child)
1080 return(1);
1081
1082 print_word(n->norm->Es->child->string);
1083 outflags &= ~MMAN_spc;
1084 return(1);
1085 }
1086
1087 static void
1088 post_en(DECL_ARGS)
1089 {
1090
1091 if (NULL == n->norm->Es ||
1092 NULL == n->norm->Es->child ||
1093 NULL == n->norm->Es->child->next)
1094 return;
1095
1096 outflags &= ~MMAN_spc;
1097 print_word(n->norm->Es->child->next->string);
1098 return;
1099 }
1100
1101 static void
1102 post_eo(DECL_ARGS)
1103 {
1104
1105 if (MDOC_HEAD == n->type || MDOC_BODY == n->type)
1106 outflags &= ~MMAN_spc;
1107 }
1108
1109 static int
1110 pre_es(DECL_ARGS)
1111 {
1112
1113 return(0);
1114 }
1115
1116 static int
1117 pre_fa(DECL_ARGS)
1118 {
1119 int am_Fa;
1120
1121 am_Fa = MDOC_Fa == n->tok;
1122
1123 if (am_Fa)
1124 n = n->child;
1125
1126 while (NULL != n) {
1127 font_push('I');
1128 if (am_Fa || MDOC_SYNPRETTY & n->flags)
1129 outflags |= MMAN_nbrword;
1130 print_node(meta, n);
1131 font_pop();
1132 if (NULL != (n = n->next))
1133 print_word(",");
1134 }
1135 return(0);
1136 }
1137
1138 static void
1139 post_fa(DECL_ARGS)
1140 {
1141
1142 if (NULL != n->next && MDOC_Fa == n->next->tok)
1143 print_word(",");
1144 }
1145
1146 static int
1147 pre_fd(DECL_ARGS)
1148 {
1149
1150 pre_syn(n);
1151 font_push('B');
1152 return(1);
1153 }
1154
1155 static void
1156 post_fd(DECL_ARGS)
1157 {
1158
1159 font_pop();
1160 outflags |= MMAN_br;
1161 }
1162
1163 static int
1164 pre_fl(DECL_ARGS)
1165 {
1166
1167 font_push('B');
1168 print_word("\\-");
1169 if (n->nchild)
1170 outflags &= ~MMAN_spc;
1171 return(1);
1172 }
1173
1174 static void
1175 post_fl(DECL_ARGS)
1176 {
1177
1178 font_pop();
1179 if ( ! (n->nchild ||
1180 n->next == NULL ||
1181 n->next->type == MDOC_TEXT ||
1182 n->next->flags & MDOC_LINE))
1183 outflags &= ~MMAN_spc;
1184 }
1185
1186 static int
1187 pre_fn(DECL_ARGS)
1188 {
1189
1190 pre_syn(n);
1191
1192 n = n->child;
1193 if (NULL == n)
1194 return(0);
1195
1196 if (MDOC_SYNPRETTY & n->flags)
1197 print_block(".HP 4n", MMAN_nl);
1198
1199 font_push('B');
1200 print_node(meta, n);
1201 font_pop();
1202 outflags &= ~MMAN_spc;
1203 print_word("(");
1204 outflags &= ~MMAN_spc;
1205
1206 n = n->next;
1207 if (NULL != n)
1208 pre_fa(meta, n);
1209 return(0);
1210 }
1211
1212 static void
1213 post_fn(DECL_ARGS)
1214 {
1215
1216 print_word(")");
1217 if (MDOC_SYNPRETTY & n->flags) {
1218 print_word(";");
1219 outflags |= MMAN_PP;
1220 }
1221 }
1222
1223 static int
1224 pre_fo(DECL_ARGS)
1225 {
1226
1227 switch (n->type) {
1228 case MDOC_BLOCK:
1229 pre_syn(n);
1230 break;
1231 case MDOC_HEAD:
1232 if (MDOC_SYNPRETTY & n->flags)
1233 print_block(".HP 4n", MMAN_nl);
1234 font_push('B');
1235 break;
1236 case MDOC_BODY:
1237 outflags &= ~MMAN_spc;
1238 print_word("(");
1239 outflags &= ~MMAN_spc;
1240 break;
1241 default:
1242 break;
1243 }
1244 return(1);
1245 }
1246
1247 static void
1248 post_fo(DECL_ARGS)
1249 {
1250
1251 switch (n->type) {
1252 case MDOC_HEAD:
1253 font_pop();
1254 break;
1255 case MDOC_BODY:
1256 post_fn(meta, n);
1257 break;
1258 default:
1259 break;
1260 }
1261 }
1262
1263 static int
1264 pre_ft(DECL_ARGS)
1265 {
1266
1267 pre_syn(n);
1268 font_push('I');
1269 return(1);
1270 }
1271
1272 static int
1273 pre_in(DECL_ARGS)
1274 {
1275
1276 if (MDOC_SYNPRETTY & n->flags) {
1277 pre_syn(n);
1278 font_push('B');
1279 print_word("#include <");
1280 outflags &= ~MMAN_spc;
1281 } else {
1282 print_word("<");
1283 outflags &= ~MMAN_spc;
1284 font_push('I');
1285 }
1286 return(1);
1287 }
1288
1289 static void
1290 post_in(DECL_ARGS)
1291 {
1292
1293 if (MDOC_SYNPRETTY & n->flags) {
1294 outflags &= ~MMAN_spc;
1295 print_word(">");
1296 font_pop();
1297 outflags |= MMAN_br;
1298 } else {
1299 font_pop();
1300 outflags &= ~MMAN_spc;
1301 print_word(">");
1302 }
1303 }
1304
1305 static int
1306 pre_it(DECL_ARGS)
1307 {
1308 const struct mdoc_node *bln;
1309
1310 switch (n->type) {
1311 case MDOC_HEAD:
1312 outflags |= MMAN_PP | MMAN_nl;
1313 bln = n->parent->parent;
1314 if (0 == bln->norm->Bl.comp ||
1315 (NULL == n->parent->prev &&
1316 NULL == bln->parent->prev))
1317 outflags |= MMAN_sp;
1318 outflags &= ~MMAN_br;
1319 switch (bln->norm->Bl.type) {
1320 case LIST_item:
1321 return(0);
1322 case LIST_inset:
1323 /* FALLTHROUGH */
1324 case LIST_diag:
1325 /* FALLTHROUGH */
1326 case LIST_ohang:
1327 if (bln->norm->Bl.type == LIST_diag)
1328 print_line(".B \"", 0);
1329 else
1330 print_line(".R \"", 0);
1331 outflags &= ~MMAN_spc;
1332 return(1);
1333 case LIST_bullet:
1334 /* FALLTHROUGH */
1335 case LIST_dash:
1336 /* FALLTHROUGH */
1337 case LIST_hyphen:
1338 print_width(bln->norm->Bl.width, NULL, 0);
1339 TPremain = 0;
1340 outflags |= MMAN_nl;
1341 font_push('B');
1342 if (LIST_bullet == bln->norm->Bl.type)
1343 print_word("o");
1344 else
1345 print_word("-");
1346 font_pop();
1347 outflags |= MMAN_nl;
1348 return(0);
1349 case LIST_enum:
1350 print_width(bln->norm->Bl.width, NULL, 0);
1351 TPremain = 0;
1352 outflags |= MMAN_nl;
1353 print_count(&bln->norm->Bl.count);
1354 outflags |= MMAN_nl;
1355 return(0);
1356 case LIST_hang:
1357 print_width(bln->norm->Bl.width, n->child, 6);
1358 TPremain = 0;
1359 outflags |= MMAN_nl;
1360 return(1);
1361 case LIST_tag:
1362 print_width(bln->norm->Bl.width, n->child, 0);
1363 putchar('\n');
1364 outflags &= ~MMAN_spc;
1365 return(1);
1366 default:
1367 return(1);
1368 }
1369 default:
1370 break;
1371 }
1372 return(1);
1373 }
1374
1375 /*
1376 * This function is called after closing out an indented block.
1377 * If we are inside an enclosing list, restore its indentation.
1378 */
1379 static void
1380 mid_it(void)
1381 {
1382 char buf[24];
1383
1384 /* Nothing to do outside a list. */
1385 if (0 == Bl_stack_len || 0 == Bl_stack[Bl_stack_len - 1])
1386 return;
1387
1388 /* The indentation has already been set up. */
1389 if (Bl_stack_post[Bl_stack_len - 1])
1390 return;
1391
1392 /* Restore the indentation of the enclosing list. */
1393 print_line(".RS", MMAN_Bk_susp);
1394 (void)snprintf(buf, sizeof(buf), "%zun",
1395 Bl_stack[Bl_stack_len - 1]);
1396 print_word(buf);
1397
1398 /* Remeber to close out this .RS block later. */
1399 Bl_stack_post[Bl_stack_len - 1] = 1;
1400 }
1401
1402 static void
1403 post_it(DECL_ARGS)
1404 {
1405 const struct mdoc_node *bln;
1406
1407 bln = n->parent->parent;
1408
1409 switch (n->type) {
1410 case MDOC_HEAD:
1411 switch (bln->norm->Bl.type) {
1412 case LIST_diag:
1413 outflags &= ~MMAN_spc;
1414 print_word("\\ ");
1415 break;
1416 case LIST_ohang:
1417 outflags |= MMAN_br;
1418 break;
1419 default:
1420 break;
1421 }
1422 break;
1423 case MDOC_BODY:
1424 switch (bln->norm->Bl.type) {
1425 case LIST_bullet:
1426 /* FALLTHROUGH */
1427 case LIST_dash:
1428 /* FALLTHROUGH */
1429 case LIST_hyphen:
1430 /* FALLTHROUGH */
1431 case LIST_enum:
1432 /* FALLTHROUGH */
1433 case LIST_hang:
1434 /* FALLTHROUGH */
1435 case LIST_tag:
1436 assert(Bl_stack_len);
1437 Bl_stack[--Bl_stack_len] = 0;
1438
1439 /*
1440 * Our indentation had to be restored
1441 * after a child display or child list.
1442 * Close out that indentation block now.
1443 */
1444 if (Bl_stack_post[Bl_stack_len]) {
1445 print_line(".RE", MMAN_nl);
1446 Bl_stack_post[Bl_stack_len] = 0;
1447 }
1448 break;
1449 case LIST_column:
1450 if (NULL != n->next) {
1451 putchar('\t');
1452 outflags &= ~MMAN_spc;
1453 }
1454 break;
1455 default:
1456 break;
1457 }
1458 break;
1459 default:
1460 break;
1461 }
1462 }
1463
1464 static void
1465 post_lb(DECL_ARGS)
1466 {
1467
1468 if (SEC_LIBRARY == n->sec)
1469 outflags |= MMAN_br;
1470 }
1471
1472 static int
1473 pre_lk(DECL_ARGS)
1474 {
1475 const struct mdoc_node *link, *descr;
1476
1477 if (NULL == (link = n->child))
1478 return(0);
1479
1480 if (NULL != (descr = link->next)) {
1481 font_push('I');
1482 while (NULL != descr) {
1483 print_word(descr->string);
1484 descr = descr->next;
1485 }
1486 print_word(":");
1487 font_pop();
1488 }
1489
1490 font_push('B');
1491 print_word(link->string);
1492 font_pop();
1493 return(0);
1494 }
1495
1496 static int
1497 pre_ll(DECL_ARGS)
1498 {
1499
1500 print_line(".ll", 0);
1501 return(1);
1502 }
1503
1504 static int
1505 pre_li(DECL_ARGS)
1506 {
1507
1508 font_push('R');
1509 return(1);
1510 }
1511
1512 static int
1513 pre_nm(DECL_ARGS)
1514 {
1515 char *name;
1516
1517 if (MDOC_BLOCK == n->type) {
1518 outflags |= MMAN_Bk;
1519 pre_syn(n);
1520 }
1521 if (MDOC_ELEM != n->type && MDOC_HEAD != n->type)
1522 return(1);
1523 name = n->child ? n->child->string : meta->name;
1524 if (NULL == name)
1525 return(0);
1526 if (MDOC_HEAD == n->type) {
1527 if (NULL == n->parent->prev)
1528 outflags |= MMAN_sp;
1529 print_block(".HP", 0);
1530 printf(" %zun", strlen(name) + 1);
1531 outflags |= MMAN_nl;
1532 }
1533 font_push('B');
1534 if (NULL == n->child)
1535 print_word(meta->name);
1536 return(1);
1537 }
1538
1539 static void
1540 post_nm(DECL_ARGS)
1541 {
1542
1543 switch (n->type) {
1544 case MDOC_BLOCK:
1545 outflags &= ~MMAN_Bk;
1546 break;
1547 case MDOC_HEAD:
1548 /* FALLTHROUGH */
1549 case MDOC_ELEM:
1550 if (n->child != NULL || meta->name != NULL)
1551 font_pop();
1552 break;
1553 default:
1554 break;
1555 }
1556 }
1557
1558 static int
1559 pre_no(DECL_ARGS)
1560 {
1561
1562 outflags |= MMAN_spc_force;
1563 return(1);
1564 }
1565
1566 static int
1567 pre_ns(DECL_ARGS)
1568 {
1569
1570 outflags &= ~MMAN_spc;
1571 return(0);
1572 }
1573
1574 static void
1575 post_pf(DECL_ARGS)
1576 {
1577
1578 outflags &= ~MMAN_spc;
1579 }
1580
1581 static int
1582 pre_pp(DECL_ARGS)
1583 {
1584
1585 if (MDOC_It != n->parent->tok)
1586 outflags |= MMAN_PP;
1587 outflags |= MMAN_sp | MMAN_nl;
1588 outflags &= ~MMAN_br;
1589 return(0);
1590 }
1591
1592 static int
1593 pre_rs(DECL_ARGS)
1594 {
1595
1596 if (SEC_SEE_ALSO == n->sec) {
1597 outflags |= MMAN_PP | MMAN_sp | MMAN_nl;
1598 outflags &= ~MMAN_br;
1599 }
1600 return(1);
1601 }
1602
1603 static int
1604 pre_rv(DECL_ARGS)
1605 {
1606 int nchild;
1607
1608 outflags |= MMAN_br | MMAN_nl;
1609
1610 nchild = n->nchild;
1611 if (nchild > 0) {
1612 print_word("The");
1613
1614 for (n = n->child; n; n = n->next) {
1615 font_push('B');
1616 print_word(n->string);
1617 font_pop();
1618
1619 outflags &= ~MMAN_spc;
1620 print_word("()");
1621
1622 if (n->next == NULL)
1623 continue;
1624
1625 if (nchild > 2) {
1626 outflags &= ~MMAN_spc;
1627 print_word(",");
1628 }
1629 if (n->next->next == NULL)
1630 print_word("and");
1631 }
1632
1633 if (nchild > 1)
1634 print_word("functions return");
1635 else
1636 print_word("function returns");
1637
1638 print_word("the value\\~0 if successful;");
1639 } else
1640 print_word("Upon successful completion, "
1641 "the value\\~0 is returned;");
1642
1643 print_word("otherwise the value\\~\\-1 is returned"
1644 " and the global variable");
1645
1646 font_push('I');
1647 print_word("errno");
1648 font_pop();
1649
1650 print_word("is set to indicate the error.");
1651 outflags |= MMAN_nl;
1652 return(0);
1653 }
1654
1655 static int
1656 pre_sm(DECL_ARGS)
1657 {
1658
1659 if (NULL == n->child)
1660 outflags ^= MMAN_Sm;
1661 else if (0 == strcmp("on", n->child->string))
1662 outflags |= MMAN_Sm;
1663 else
1664 outflags &= ~MMAN_Sm;
1665
1666 if (MMAN_Sm & outflags)
1667 outflags |= MMAN_spc;
1668
1669 return(0);
1670 }
1671
1672 static int
1673 pre_sp(DECL_ARGS)
1674 {
1675
1676 if (MMAN_PP & outflags) {
1677 outflags &= ~MMAN_PP;
1678 print_line(".PP", 0);
1679 } else
1680 print_line(".sp", 0);
1681 return(1);
1682 }
1683
1684 static void
1685 post_sp(DECL_ARGS)
1686 {
1687
1688 outflags |= MMAN_nl;
1689 }
1690
1691 static int
1692 pre_sy(DECL_ARGS)
1693 {
1694
1695 font_push('B');
1696 return(1);
1697 }
1698
1699 static int
1700 pre_vt(DECL_ARGS)
1701 {
1702
1703 if (MDOC_SYNPRETTY & n->flags) {
1704 switch (n->type) {
1705 case MDOC_BLOCK:
1706 pre_syn(n);
1707 return(1);
1708 case MDOC_BODY:
1709 break;
1710 default:
1711 return(0);
1712 }
1713 }
1714 font_push('I');
1715 return(1);
1716 }
1717
1718 static void
1719 post_vt(DECL_ARGS)
1720 {
1721
1722 if (MDOC_SYNPRETTY & n->flags && MDOC_BODY != n->type)
1723 return;
1724 font_pop();
1725 }
1726
1727 static int
1728 pre_xr(DECL_ARGS)
1729 {
1730
1731 n = n->child;
1732 if (NULL == n)
1733 return(0);
1734 print_node(meta, n);
1735 n = n->next;
1736 if (NULL == n)
1737 return(0);
1738 outflags &= ~MMAN_spc;
1739 print_word("(");
1740 print_node(meta, n);
1741 print_word(")");
1742 return(0);
1743 }
1744
1745 static int
1746 pre_ux(DECL_ARGS)
1747 {
1748
1749 print_word(manacts[n->tok].prefix);
1750 if (NULL == n->child)
1751 return(0);
1752 outflags &= ~MMAN_spc;
1753 print_word("\\ ");
1754 outflags &= ~MMAN_spc;
1755 return(1);
1756 }
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