mdoc_man.c

   1 /*      $Id: mdoc_man.c,v 1.9 2011/10/24 21:47:59 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2011 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 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #include <stdio.h>
  22 #include <string.h>
  23
  24 #include "mandoc.h"
  25 #include "man.h"
  26 #include "mdoc.h"
  27 #include "main.h"
  28
  29 #define DECL_ARGS const struct mdoc_meta *m, \
  30                   const struct mdoc_node *n, \
  31                   struct mman *mm
  32
  33 struct  mman {
  34         int               need_space; /* next word needs prior ws */
  35         int               need_nl; /* next word needs prior nl */
  36 };
  37
  38 struct  manact {
  39         int             (*cond)(DECL_ARGS); /* DON'T run actions */
  40         int             (*pre)(DECL_ARGS); /* pre-node action */
  41         void            (*post)(DECL_ARGS); /* post-node action */
  42         const char       *prefix; /* pre-node string constant */
  43         const char       *suffix; /* post-node string constant */
  44 };
  45
  46 static  int       cond_body(DECL_ARGS);
  47 static  int       cond_head(DECL_ARGS);
  48 static  void      post_bd(DECL_ARGS);
  49 static  void      post_dl(DECL_ARGS);
  50 static  void      post_enc(DECL_ARGS);
  51 static  void      post_nm(DECL_ARGS);
  52 static  void      post_percent(DECL_ARGS);
  53 static  void      post_pf(DECL_ARGS);
  54 static  void      post_sect(DECL_ARGS);
  55 static  void      post_sp(DECL_ARGS);
  56 static  int       pre_ap(DECL_ARGS);
  57 static  int       pre_bd(DECL_ARGS);
  58 static  int       pre_br(DECL_ARGS);
  59 static  int       pre_bx(DECL_ARGS);
  60 static  int       pre_dl(DECL_ARGS);
  61 static  int       pre_enc(DECL_ARGS);
  62 static  int       pre_it(DECL_ARGS);
  63 static  int       pre_nm(DECL_ARGS);
  64 static  int       pre_ns(DECL_ARGS);
  65 static  int       pre_pp(DECL_ARGS);
  66 static  int       pre_sp(DECL_ARGS);
  67 static  int       pre_sect(DECL_ARGS);
  68 static  int       pre_ux(DECL_ARGS);
  69 static  int       pre_xr(DECL_ARGS);
  70 static  void      print_word(struct mman *, const char *);
  71 static  void      print_node(DECL_ARGS);
  72
  73 static  const struct manact manacts[MDOC_MAX + 1] = {
  74         { NULL, pre_ap, NULL, NULL, NULL }, /* Ap */
  75         { NULL, NULL, NULL, NULL, NULL }, /* Dd */
  76         { NULL, NULL, NULL, NULL, NULL }, /* Dt */
  77         { NULL, NULL, NULL, NULL, NULL }, /* Os */
  78         { NULL, pre_sect, post_sect, ".SH", NULL }, /* Sh */
  79         { NULL, pre_sect, post_sect, ".SS", NULL }, /* Ss */
  80         { NULL, pre_pp, NULL, NULL, NULL }, /* Pp */
  81         { cond_body, pre_dl, post_dl, NULL, NULL }, /* D1 */
  82         { cond_body, pre_dl, post_dl, NULL, NULL }, /* Dl */
  83         { cond_body, pre_bd, post_bd, NULL, NULL }, /* Bd */
  84         { NULL, NULL, NULL, NULL, NULL }, /* Ed */
  85         { NULL, NULL, NULL, NULL, NULL }, /* Bl */
  86         { NULL, NULL, NULL, NULL, NULL }, /* El */
  87         { NULL, pre_it, NULL, NULL, NULL }, /* _It */
  88         { NULL, pre_enc, post_enc, "\\fI", "\\fP" }, /* Ad */
  89         { NULL, NULL, NULL, NULL, NULL }, /* _An */
  90         { NULL, pre_enc, post_enc, "\\fI", "\\fP" }, /* Ar */
  91         { NULL, pre_enc, post_enc, "\\fB", "\\fP" }, /* Cd */
  92         { NULL, pre_enc, post_enc, "\\fB", "\\fP" }, /* Cm */
  93         { NULL, pre_enc, post_enc, "\\fR", "\\fP" }, /* Dv */
  94         { NULL, pre_enc, post_enc, "\\fR", "\\fP" }, /* Er */
  95         { NULL, pre_enc, post_enc, "\\fR", "\\fP" }, /* Ev */
  96         { NULL, pre_enc, post_enc, "The \\fB",
  97             "\\fP\nutility exits 0 on success, and >0 if an error occurs."
  98             }, /* Ex */
  99         { NULL, NULL, NULL, NULL, NULL }, /* _Fa */
 100         { NULL, NULL, NULL, NULL, NULL }, /* _Fd */
 101         { NULL, pre_enc, post_enc, "\\fB-", "\\fP" }, /* Fl */
 102         { NULL, NULL, NULL, NULL, NULL }, /* _Fn */
 103         { NULL, NULL, NULL, NULL, NULL }, /* _Ft */
 104         { NULL, pre_enc, post_enc, "\\fB", "\\fP" }, /* Ic */
 105         { NULL, NULL, NULL, NULL, NULL }, /* _In */
 106         { NULL, pre_enc, post_enc, "\\fR", "\\fP" }, /* Li */
 107         { cond_head, pre_enc, NULL, "\\- ", NULL }, /* Nd */
 108         { NULL, pre_nm, post_nm, NULL, NULL }, /* Nm */
 109         { cond_body, pre_enc, post_enc, "[", "]" }, /* Op */
 110         { NULL, NULL, NULL, NULL, NULL }, /* Ot */
 111         { NULL, pre_enc, post_enc, "\\fI", "\\fP" }, /* Pa */
 112         { NULL, pre_enc, post_enc, "The \\fB",
 113                 "\\fP\nfunction returns the value 0 if successful;\n"
 114                 "otherwise the value -1 is returned and the global\n"
 115                 "variable \\fIerrno\\fP is set to indicate the error."
 116                 }, /* Rv */
 117         { NULL, NULL, NULL, NULL, NULL }, /* St */
 118         { NULL, NULL, NULL, NULL, NULL }, /* _Va */
 119         { NULL, NULL, NULL, NULL, NULL }, /* _Vt */
 120         { NULL, pre_xr, NULL, NULL, NULL }, /* Xr */
 121         { NULL, NULL, post_percent, NULL, NULL }, /* _%A */
 122         { NULL, NULL, NULL, NULL, NULL }, /* _%B */
 123         { NULL, NULL, post_percent, NULL, NULL }, /* _%D */
 124         { NULL, NULL, NULL, NULL, NULL }, /* _%I */
 125         { NULL, pre_enc, post_percent, "\\fI", "\\fP" }, /* %J */
 126         { NULL, NULL, NULL, NULL, NULL }, /* _%N */
 127         { NULL, NULL, NULL, NULL, NULL }, /* _%O */
 128         { NULL, NULL, NULL, NULL, NULL }, /* _%P */
 129         { NULL, NULL, NULL, NULL, NULL }, /* _%R */
 130         { NULL, pre_enc, post_percent, "\"", "\"" }, /* %T */
 131         { NULL, NULL, NULL, NULL, NULL }, /* _%V */
 132         { NULL, NULL, NULL, NULL, NULL }, /* Ac */
 133         { cond_body, pre_enc, post_enc, "<", ">" }, /* Ao */
 134         { cond_body, pre_enc, post_enc, "<", ">" }, /* Aq */
 135         { NULL, NULL, NULL, NULL, NULL }, /* At */
 136         { NULL, NULL, NULL, NULL, NULL }, /* Bc */
 137         { NULL, NULL, NULL, NULL, NULL }, /* _Bf */
 138         { cond_body, pre_enc, post_enc, "[", "]" }, /* Bo */
 139         { cond_body, pre_enc, post_enc, "[", "]" }, /* Bq */
 140         { NULL, pre_ux, NULL, "BSD/OS", NULL }, /* Bsx */
 141         { NULL, pre_bx, NULL, NULL, NULL }, /* Bx */
 142         { NULL, NULL, NULL, NULL, NULL }, /* Db */
 143         { NULL, NULL, NULL, NULL, NULL }, /* Dc */
 144         { cond_body, pre_enc, post_enc, "``", "''" }, /* Do */
 145         { cond_body, pre_enc, post_enc, "``", "''" }, /* Dq */
 146         { NULL, NULL, NULL, NULL, NULL }, /* _Ec */
 147         { NULL, NULL, NULL, NULL, NULL }, /* _Ef */
 148         { NULL, pre_enc, post_enc, "\\fI", "\\fP" }, /* Em */
 149         { NULL, NULL, NULL, NULL, NULL }, /* _Eo */
 150         { NULL, pre_ux, NULL, "FreeBSD", NULL }, /* Fx */
 151         { NULL, pre_enc, post_enc, "\\fB", "\\fP" }, /* Ms */
 152         { NULL, NULL, NULL, NULL, NULL }, /* No */
 153         { NULL, pre_ns, NULL, NULL, NULL }, /* Ns */
 154         { NULL, pre_ux, NULL, "NetBSD", NULL }, /* Nx */
 155         { NULL, pre_ux, NULL, "OpenBSD", NULL }, /* Ox */
 156         { NULL, NULL, NULL, NULL, NULL }, /* Pc */
 157         { NULL, NULL, post_pf, NULL, NULL }, /* Pf */
 158         { cond_body, pre_enc, post_enc, "(", ")" }, /* Po */
 159         { cond_body, pre_enc, post_enc, "(", ")" }, /* Pq */
 160         { NULL, NULL, NULL, NULL, NULL }, /* Qc */
 161         { cond_body, pre_enc, post_enc, "`", "'" }, /* Ql */
 162         { cond_body, pre_enc, post_enc, "\"", "\"" }, /* Qo */
 163         { cond_body, pre_enc, post_enc, "\"", "\"" }, /* Qq */
 164         { NULL, NULL, NULL, NULL, NULL }, /* Re */
 165         { cond_body, pre_pp, NULL, NULL, NULL }, /* Rs */
 166         { NULL, NULL, NULL, NULL, NULL }, /* Sc */
 167         { cond_body, pre_enc, post_enc, "`", "'" }, /* So */
 168         { cond_body, pre_enc, post_enc, "`", "'" }, /* Sq */
 169         { NULL, NULL, NULL, NULL, NULL }, /* _Sm */
 170         { NULL, pre_enc, post_enc, "\\fI", "\\fP" }, /* Sx */
 171         { NULL, pre_enc, post_enc, "\\fB", "\\fP" }, /* Sy */
 172         { NULL, pre_enc, post_enc, "\\fR", "\\fP" }, /* Tn */
 173         { NULL, pre_ux, NULL, "UNIX", NULL }, /* Ux */
 174         { NULL, NULL, NULL, NULL, NULL }, /* _Xc */
 175         { NULL, NULL, NULL, NULL, NULL }, /* _Xo */
 176         { NULL, NULL, NULL, NULL, NULL }, /* _Fo */
 177         { NULL, NULL, NULL, NULL, NULL }, /* _Fc */
 178         { cond_body, pre_enc, post_enc, "[", "]" }, /* Oo */
 179         { NULL, NULL, NULL, NULL, NULL }, /* Oc */
 180         { NULL, NULL, NULL, NULL, NULL }, /* _Bk */
 181         { NULL, NULL, NULL, NULL, NULL }, /* _Ek */
 182         { NULL, pre_ux, NULL, "is currently in beta test.", NULL }, /* Bt */
 183         { NULL, NULL, NULL, NULL, NULL }, /* Hf */
 184         { NULL, NULL, NULL, NULL, NULL }, /* Fr */
 185         { NULL, pre_ux, NULL, "currently under development.", NULL }, /* Ud */
 186         { NULL, NULL, NULL, NULL, NULL }, /* _Lb */
 187         { NULL, pre_pp, NULL, NULL, NULL }, /* Lp */
 188         { NULL, NULL, NULL, NULL, NULL }, /* _Lk */
 189         { NULL, NULL, NULL, NULL, NULL }, /* _Mt */
 190         { cond_body, pre_enc, post_enc, "{", "}" }, /* Brq */
 191         { cond_body, pre_enc, post_enc, "{", "}" }, /* Bro */
 192         { NULL, NULL, NULL, NULL, NULL }, /* Brc */
 193         { NULL, NULL, NULL, NULL, NULL }, /* _%C */
 194         { NULL, NULL, NULL, NULL, NULL }, /* _Es */
 195         { NULL, NULL, NULL, NULL, NULL }, /* _En */
 196         { NULL, pre_ux, NULL, "DragonFly", NULL }, /* Dx */
 197         { NULL, NULL, NULL, NULL, NULL }, /* _%Q */
 198         { NULL, pre_br, NULL, NULL, NULL }, /* br */
 199         { NULL, pre_sp, post_sp, NULL, NULL }, /* sp */
 200         { NULL, NULL, NULL, NULL, NULL }, /* _%U */
 201         { NULL, NULL, NULL, NULL, NULL }, /* _Ta */
 202         { NULL, NULL, NULL, NULL, NULL }, /* ROOT */
 203 };
 204
 205 static void
 206 print_word(struct mman *mm, const char *s)
 207 {
 208
 209         if (mm->need_nl) {
 210                 /*
 211                  * If we need a newline, print it now and start afresh.
 212                  */
 213                 putchar('\n');
 214                 mm->need_space = 0;
 215                 mm->need_nl = 0;
 216         } else if (mm->need_space && '\0' != s[0])
 217                 /*
 218                  * If we need a space, only print it before
 219                  * (1) a nonzero length word;
 220                  * (2) a word that is non-punctuation; and
 221                  * (3) if punctuation, non-terminating puncutation.
 222                  */
 223                 if (NULL == strchr(".,:;)]?!", s[0]) || '\0' != s[1])
 224                         putchar(' ');
 225
 226         /*
 227          * Reassign needing space if we're not following opening
 228          * punctuation.
 229          */
 230         mm->need_space =
 231                 ('(' != s[0] && '[' != s[0]) || '\0' != s[1];
 232
 233         for ( ; *s; s++) {
 234                 switch (*s) {
 235                 case (ASCII_NBRSP):
 236                         printf("\\~");
 237                         break;
 238                 case (ASCII_HYPH):
 239                         putchar('-');
 240                         break;
 241                 default:
 242                         putchar((unsigned char)*s);
 243                         break;
 244                 }
 245         }
 246 }
 247
 248 void
 249 man_man(void *arg, const struct man *man)
 250 {
 251
 252         /*
 253          * Dump the keep buffer.
 254          * We're guaranteed by now that this exists (is non-NULL).
 255          * Flush stdout afterward, just in case.
 256          */
 257         fputs(mparse_getkeep(man_mparse(man)), stdout);
 258         fflush(stdout);
 259 }
 260
 261 void
 262 man_mdoc(void *arg, const struct mdoc *mdoc)
 263 {
 264         const struct mdoc_meta *m;
 265         const struct mdoc_node *n;
 266         struct mman             mm;
 267
 268         m = mdoc_meta(mdoc);
 269         n = mdoc_node(mdoc);
 270
 271         printf(".TH \"%s\" \"%s\" \"%s\" \"%s\" \"%s\"",
 272                         m->title, m->msec, m->date, m->os, m->vol);
 273
 274         memset(&mm, 0, sizeof(struct mman));
 275
 276         mm.need_nl = 1;
 277         print_node(m, n, &mm);
 278         putchar('\n');
 279 }
 280
 281 static void
 282 print_node(DECL_ARGS)
 283 {
 284         const struct mdoc_node  *prev, *sub;
 285         const struct manact     *act;
 286         int                      cond, do_sub;
 287
 288         /*
 289          * Break the line if we were parsed subsequent the current node.
 290          * This makes the page structure be more consistent.
 291          */
 292         prev = n->prev ? n->prev : n->parent;
 293         if (prev && prev->line < n->line)
 294                 mm->need_nl = 1;
 295
 296         act = NULL;
 297         cond = 0;
 298         do_sub = 1;
 299
 300         if (MDOC_TEXT == n->type) {
 301                 /*
 302                  * Make sure that we don't happen to start with a
 303                  * control character at the start of a line.
 304                  */
 305                 if (mm->need_nl && ('.' == *n->string ||
 306                                         '\'' == *n->string)) {
 307                         print_word(mm, "\\&");
 308                         mm->need_space = 0;
 309                 }
 310                 print_word(mm, n->string);
 311         } else {
 312                 /*
 313                  * Conditionally run the pre-node action handler for a
 314                  * node.
 315                  */
 316                 act = manacts + n->tok;
 317                 cond = NULL == act->cond || (*act->cond)(m, n, mm);
 318                 if (cond && act->pre)
 319                         do_sub = (*act->pre)(m, n, mm);
 320         }
 321
 322         /*
 323          * Conditionally run all child nodes.
 324          * Note that this iterates over children instead of using
 325          * recursion.  This prevents unnecessary depth in the stack.
 326          */
 327         if (do_sub)
 328                 for (sub = n->child; sub; sub = sub->next)
 329                         print_node(m, sub, mm);
 330
 331         /*
 332          * Lastly, conditionally run the post-node handler.
 333          */
 334         if (cond && act->post)
 335                 (*act->post)(m, n, mm);
 336 }
 337
 338 static int
 339 cond_head(DECL_ARGS)
 340 {
 341
 342         return(MDOC_HEAD == n->type);
 343 }
 344
 345 static int
 346 cond_body(DECL_ARGS)
 347 {
 348
 349         return(MDOC_BODY == n->type);
 350 }
 351
 352 /*
 353  * Output a font encoding before a node, e.g., \fR.
 354  * This obviously has no trailing space.
 355  */
 356 static int
 357 pre_enc(DECL_ARGS)
 358 {
 359         const char      *prefix;
 360
 361         prefix = manacts[n->tok].prefix;
 362         if (NULL == prefix)
 363                 return(1);
 364         print_word(mm, prefix);
 365         mm->need_space = 0;
 366         return(1);
 367 }
 368
 369 /*
 370  * Output a font encoding subsequent a node, e.g., \fP.
 371  */
 372 static void
 373 post_enc(DECL_ARGS)
 374 {
 375         const char *suffix;
 376
 377         suffix = manacts[n->tok].suffix;
 378         if (NULL == suffix)
 379                 return;
 380         mm->need_space = 0;
 381         print_word(mm, suffix);
 382 }
 383
 384 /*
 385  * Used in listings (percent = %A, e.g.).
 386  * FIXME: this is incomplete.
 387  * It doesn't print a nice ", and" for lists.
 388  */
 389 static void
 390 post_percent(DECL_ARGS)
 391 {
 392
 393         post_enc(m, n, mm);
 394         if (n->next)
 395                 print_word(mm, ",");
 396         else {
 397                 print_word(mm, ".");
 398                 mm->need_nl = 1;
 399         }
 400 }
 401
 402 /*
 403  * Print before a section header.
 404  */
 405 static int
 406 pre_sect(DECL_ARGS)
 407 {
 408
 409         if (MDOC_HEAD != n->type)
 410                 return(1);
 411         mm->need_nl = 1;
 412         print_word(mm, manacts[n->tok].prefix);
 413         print_word(mm, "\"");
 414         mm->need_space = 0;
 415         return(1);
 416 }
 417
 418 /*
 419  * Print subsequent a section header.
 420  */
 421 static void
 422 post_sect(DECL_ARGS)
 423 {
 424
 425         if (MDOC_HEAD != n->type)
 426                 return;
 427         mm->need_space = 0;
 428         print_word(mm, "\"");
 429         mm->need_nl = 1;
 430 }
 431
 432 static int
 433 pre_ap(DECL_ARGS)
 434 {
 435
 436         mm->need_space = 0;
 437         print_word(mm, "'");
 438         mm->need_space = 0;
 439         return(0);
 440 }
 441
 442 static int
 443 pre_bd(DECL_ARGS)
 444 {
 445
 446         if (DISP_unfilled == n->norm->Bd.type ||
 447             DISP_literal  == n->norm->Bd.type) {
 448                 mm->need_nl = 1;
 449                 print_word(mm, ".nf");
 450         }
 451         mm->need_nl = 1;
 452         return(1);
 453 }
 454
 455 static void
 456 post_bd(DECL_ARGS)
 457 {
 458
 459         if (DISP_unfilled == n->norm->Bd.type ||
 460             DISP_literal  == n->norm->Bd.type) {
 461                 mm->need_nl = 1;
 462                 print_word(mm, ".fi");
 463         }
 464         mm->need_nl = 1;
 465 }
 466
 467 static int
 468 pre_br(DECL_ARGS)
 469 {
 470
 471         mm->need_nl = 1;
 472         print_word(mm, ".br");
 473         mm->need_nl = 1;
 474         return(0);
 475 }
 476
 477 static int
 478 pre_bx(DECL_ARGS)
 479 {
 480
 481         n = n->child;
 482         if (n) {
 483                 print_word(mm, n->string);
 484                 mm->need_space = 0;
 485                 n = n->next;
 486         }
 487         print_word(mm, "BSD");
 488         if (NULL == n)
 489                 return(0);
 490         mm->need_space = 0;
 491         print_word(mm, "-");
 492         mm->need_space = 0;
 493         print_word(mm, n->string);
 494         return(0);
 495 }
 496
 497 static int
 498 pre_dl(DECL_ARGS)
 499 {
 500
 501         mm->need_nl = 1;
 502         print_word(mm, ".RS 6n");
 503         mm->need_nl = 1;
 504         return(1);
 505 }
 506
 507 static void
 508 post_dl(DECL_ARGS)
 509 {
 510
 511         mm->need_nl = 1;
 512         print_word(mm, ".RE");
 513         mm->need_nl = 1;
 514 }
 515
 516 static int
 517 pre_it(DECL_ARGS)
 518 {
 519         const struct mdoc_node *bln;
 520
 521         if (MDOC_HEAD == n->type) {
 522                 mm->need_nl = 1;
 523                 print_word(mm, ".TP");
 524                 bln = n->parent->parent->prev;
 525                 switch (bln->norm->Bl.type) {
 526                 case (LIST_bullet):
 527                         print_word(mm, "4n");
 528                         mm->need_nl = 1;
 529                         print_word(mm, "\\fBo\\fP");
 530                         break;
 531                 default:
 532                         if (bln->norm->Bl.width)
 533                                 print_word(mm, bln->norm->Bl.width);
 534                         break;
 535                 }
 536                 mm->need_nl = 1;
 537         }
 538         return(1);
 539 }
 540
 541 static int
 542 pre_nm(DECL_ARGS)
 543 {
 544
 545         if (MDOC_ELEM != n->type && MDOC_HEAD != n->type)
 546                 return(1);
 547         print_word(mm, "\\fB");
 548         mm->need_space = 0;
 549         if (NULL == n->child)
 550                 print_word(mm, m->name);
 551         return(1);
 552 }
 553
 554 static void
 555 post_nm(DECL_ARGS)
 556 {
 557
 558         if (MDOC_ELEM != n->type && MDOC_HEAD != n->type)
 559                 return;
 560         mm->need_space = 0;
 561         print_word(mm, "\\fP");
 562 }
 563
 564 static int
 565 pre_ns(DECL_ARGS)
 566 {
 567
 568         mm->need_space = 0;
 569         return(0);
 570 }
 571
 572 static void
 573 post_pf(DECL_ARGS)
 574 {
 575
 576         mm->need_space = 0;
 577 }
 578
 579 static int
 580 pre_pp(DECL_ARGS)
 581 {
 582
 583         mm->need_nl = 1;
 584         if (MDOC_It == n->parent->tok)
 585                 print_word(mm, ".sp");
 586         else
 587                 print_word(mm, ".PP");
 588         mm->need_nl = 1;
 589         return(1);
 590 }
 591
 592 static int
 593 pre_sp(DECL_ARGS)
 594 {
 595
 596         mm->need_nl = 1;
 597         print_word(mm, ".sp");
 598         return(1);
 599 }
 600
 601 static void
 602 post_sp(DECL_ARGS)
 603 {
 604
 605         mm->need_nl = 1;
 606 }
 607
 608 static int
 609 pre_xr(DECL_ARGS)
 610 {
 611
 612         n = n->child;
 613         if (NULL == n)
 614                 return(0);
 615         print_node(m, n, mm);
 616         n = n->next;
 617         if (NULL == n)
 618                 return(0);
 619         mm->need_space = 0;
 620         print_word(mm, "(");
 621         print_node(m, n, mm);
 622         print_word(mm, ")");
 623         return(0);
 624 }
 625
 626 static int
 627 pre_ux(DECL_ARGS)
 628 {
 629
 630         print_word(mm, manacts[n->tok].prefix);
 631         if (NULL == n->child)
 632                 return(0);
 633         mm->need_space = 0;
 634         print_word(mm, "\\~");
 635         mm->need_space = 0;
 636         return(1);
 637 }