Massively reduce the amount of text, cutting it down to what is needed

[mandoc.git] / man_macro.c

diff --git a/man_macro.c b/man_macro.c
index d03d12c54cc2994f82022753ce134571d70d23ff..cbde3faa692738b20ae9285522b4e612da905819 100644 (file)
--- a/man_macro.c
+++ b/man_macro.c
@@ -1,168 +1,441 @@
-/* $Id: man_macro.c,v 1.6 2009/03/25 15:36:05 kristaps Exp $ */
+/*     $Id: man_macro.c,v 1.128 2018/08/18 02:08:27 schwarze Exp $ */

 /*
 /*

- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@openbsd.org>
+ * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2012-2015, 2017, 2018 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2013 Franco Fichtner <franco@lastsummer.de>

  *
  * Permission to use, copy, modify, and distribute this software for any
  *
  * Permission to use, copy, modify, and distribute this software for any

- * purpose with or without fee is hereby granted, provided that the
- * above copyright notice and this permission notice appear in all
- * copies.
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.

  *
  *

- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
- * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
- * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
- * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

  */
  */

+#include "config.h"
+
+#include <sys/types.h>
+

 #include <assert.h>
 #include <ctype.h>
 #include <assert.h>
 #include <ctype.h>

-#include <err.h> /* XXX */

 #include <stdlib.h>
 #include <stdlib.h>

-#include <stdio.h>

 #include <string.h>
 
 #include <string.h>
 

+#include "mandoc.h"
+#include "roff.h"
+#include "man.h"
+#include "libmandoc.h"
+#include "roff_int.h"

 #include "libman.h"
 
 #include "libman.h"
 

-static int              man_args(struct man *, int, 
+static void             blk_close(MACRO_PROT_ARGS);
+static void             blk_exp(MACRO_PROT_ARGS);
+static void             blk_imp(MACRO_PROT_ARGS);
+static void             in_line_eoln(MACRO_PROT_ARGS);
+static int              man_args(struct roff_man *, int,

                                int *, char *, char **);
                                int *, char *, char **);

+static void             rew_scope(struct roff_man *, enum roff_tok);
+
+static const struct man_macro man_macros[MAN_MAX - MAN_TH] = {
+       { in_line_eoln, MAN_BSCOPE }, /* TH */
+       { blk_imp, MAN_BSCOPE | MAN_SCOPED }, /* SH */
+       { blk_imp, MAN_BSCOPE | MAN_SCOPED }, /* SS */
+       { blk_imp, MAN_BSCOPE | MAN_SCOPED }, /* TP */
+       { blk_imp, MAN_BSCOPE | MAN_SCOPED }, /* TQ */
+       { blk_imp, MAN_BSCOPE }, /* LP */
+       { blk_imp, MAN_BSCOPE }, /* PP */
+       { blk_imp, MAN_BSCOPE }, /* P */
+       { blk_imp, MAN_BSCOPE }, /* IP */
+       { blk_imp, MAN_BSCOPE }, /* HP */
+       { in_line_eoln, MAN_SCOPED | MAN_JOIN }, /* SM */
+       { in_line_eoln, MAN_SCOPED | MAN_JOIN }, /* SB */
+       { in_line_eoln, 0 }, /* BI */
+       { in_line_eoln, 0 }, /* IB */
+       { in_line_eoln, 0 }, /* BR */
+       { in_line_eoln, 0 }, /* RB */
+       { in_line_eoln, MAN_SCOPED | MAN_JOIN }, /* R */
+       { in_line_eoln, MAN_SCOPED | MAN_JOIN }, /* B */
+       { in_line_eoln, MAN_SCOPED | MAN_JOIN }, /* I */
+       { in_line_eoln, 0 }, /* IR */
+       { in_line_eoln, 0 }, /* RI */
+       { in_line_eoln, MAN_NSCOPED }, /* nf */
+       { in_line_eoln, MAN_NSCOPED }, /* fi */
+       { blk_close, MAN_BSCOPE }, /* RE */
+       { blk_exp, MAN_BSCOPE }, /* RS */
+       { in_line_eoln, 0 }, /* DT */
+       { in_line_eoln, 0 }, /* UC */
+       { in_line_eoln, MAN_NSCOPED }, /* PD */
+       { in_line_eoln, 0 }, /* AT */
+       { in_line_eoln, MAN_NSCOPED }, /* in */
+       { blk_exp, MAN_BSCOPE }, /* SY */
+       { blk_close, MAN_BSCOPE }, /* YS */
+       { in_line_eoln, 0 }, /* OP */
+       { in_line_eoln, MAN_BSCOPE }, /* EX */
+       { in_line_eoln, MAN_BSCOPE }, /* EE */
+       { blk_exp, MAN_BSCOPE }, /* UR */
+       { blk_close, MAN_BSCOPE }, /* UE */
+       { blk_exp, MAN_BSCOPE }, /* MT */
+       { blk_close, MAN_BSCOPE }, /* ME */
+};
+
+
+const struct man_macro *
+man_macro(enum roff_tok tok)
+{
+       assert(tok >= MAN_TH && tok <= MAN_MAX);
+       return man_macros + (tok - MAN_TH);
+}
+
+void
+man_unscope(struct roff_man *man, const struct roff_node *to)
+{
+       struct roff_node *n;
+
+       to = to->parent;
+       n = man->last;
+       while (n != to) {
+
+               /* Reached the end of the document? */
+
+               if (to == NULL && ! (n->flags & NODE_VALID)) {
+                       if (man->flags & (MAN_BLINE | MAN_ELINE) &&
+                           man_macro(n->tok)->flags & MAN_SCOPED) {
+                               mandoc_vmsg(MANDOCERR_BLK_LINE,
+                                   man->parse, n->line, n->pos,
+                                   "EOF breaks %s", roff_name[n->tok]);
+                               if (man->flags & MAN_ELINE)
+                                       man->flags &= ~MAN_ELINE;
+                               else {
+                                       assert(n->type == ROFFT_HEAD);
+                                       n = n->parent;
+                                       man->flags &= ~MAN_BLINE;
+                               }
+                               man->last = n;
+                               n = n->parent;
+                               roff_node_delete(man, man->last);
+                               continue;
+                       }
+                       if (n->type == ROFFT_BLOCK &&
+                           man_macro(n->tok)->fp == blk_exp)
+                               mandoc_msg(MANDOCERR_BLK_NOEND,
+                                   man->parse, n->line, n->pos,
+                                   roff_name[n->tok]);
+               }
+
+               /*
+                * We might delete the man->last node
+                * in the post-validation phase.
+                * Save a pointer to the parent such that
+                * we know where to continue the iteration.
+                */

 
 

+               man->last = n;
+               n = n->parent;
+               man->last->flags |= NODE_VALID;
+       }
+
+       /*
+        * If we ended up at the parent of the node we were
+        * supposed to rewind to, that means the target node
+        * got deleted, so add the next node we parse as a child
+        * of the parent instead of as a sibling of the target.
+        */
+
+       man->next = (man->last == to) ?
+           ROFF_NEXT_CHILD : ROFF_NEXT_SIBLING;
+}

 
 

-int
-man_macro(struct man *man, int tok, int line, 
-               int ppos, int *pos, char *buf)
+/*
+ * Rewinding entails ascending the parse tree until a coherent point,
+ * for example, the `SH' macro will close out any intervening `SS'
+ * scopes.  When a scope is closed, it must be validated and actioned.
+ */
+static void
+rew_scope(struct roff_man *man, enum roff_tok tok)

 {
 {

-       int              w, la;
-       char            *p;
-       struct man_node *n;
+       struct roff_node *n;
+
+       /* Preserve empty paragraphs before RS. */

 
 

-       if ( ! man_elem_alloc(man, line, ppos, tok))
-               return(0);

        n = man->last;
        n = man->last;

-       man->next = MAN_NEXT_CHILD;
+       if (tok == MAN_RS && n->child == NULL &&
+           (n->tok == MAN_P || n->tok == MAN_PP || n->tok == MAN_LP))
+               return;

 
        for (;;) {
 
        for (;;) {

-               la = *pos;
-               w = man_args(man, line, pos, buf, &p);
+               if (n->type == ROFFT_ROOT)
+                       return;
+               if (n->flags & NODE_VALID) {
+                       n = n->parent;
+                       continue;
+               }
+               if (n->type != ROFFT_BLOCK) {
+                       if (n->parent->type == ROFFT_ROOT) {
+                               man_unscope(man, n);
+                               return;
+                       } else {
+                               n = n->parent;
+                               continue;
+                       }
+               }
+               if (tok != MAN_SH && (n->tok == MAN_SH ||
+                   (tok != MAN_SS && (n->tok == MAN_SS ||
+                    man_macro(n->tok)->fp == blk_exp))))
+                       return;
+               man_unscope(man, n);
+               n = man->last;
+       }
+}

 
 

-               if (-1 == w)
-                       return(0);
-               if (0 == w)
-                       break;

 
 

-               if ( ! man_word_alloc(man, line, la, p))
-                       return(0);
-               man->next = MAN_NEXT_SIBLING;
+/*
+ * Close out a generic explicit macro.
+ */
+void
+blk_close(MACRO_PROT_ARGS)
+{
+       enum roff_tok            ctok, ntok;
+       const struct roff_node  *nn;
+       char                    *p;
+       int                      cline, cpos, nrew, target;
+
+       nrew = 1;
+       switch (tok) {
+       case MAN_RE:
+               ntok = MAN_RS;
+               if ( ! man_args(man, line, pos, buf, &p))
+                       break;
+               for (nn = man->last->parent; nn; nn = nn->parent)
+                       if (nn->tok == ntok && nn->type == ROFFT_BLOCK)
+                               nrew++;
+               target = strtol(p, &p, 10);
+               if (*p != '\0')
+                       mandoc_vmsg(MANDOCERR_ARG_EXCESS, man->parse,
+                           line, p - buf, "RE ... %s", p);
+               if (target == 0)
+                       target = 1;
+               nrew -= target;
+               if (nrew < 1) {
+                       mandoc_vmsg(MANDOCERR_RE_NOTOPEN, man->parse,
+                           line, ppos, "RE %d", target);
+                       return;
+               }
+               break;
+       case MAN_YS:
+               ntok = MAN_SY;
+               break;
+       case MAN_UE:
+               ntok = MAN_UR;
+               break;
+       case MAN_ME:
+               ntok = MAN_MT;
+               break;
+       default:
+               abort();

        }
 
        }
 

-       for ( ; man->last && man->last != n; 
-                       man->last = man->last->parent) {
-               if ( ! man_valid_post(man))
-                       return(0);
-               if ( ! man_action_post(man))
-                       return(0);
+       for (nn = man->last->parent; nn; nn = nn->parent)
+               if (nn->tok == ntok && nn->type == ROFFT_BLOCK && ! --nrew)
+                       break;
+
+       if (nn == NULL) {
+               mandoc_msg(MANDOCERR_BLK_NOTOPEN, man->parse,
+                   line, ppos, roff_name[tok]);
+               rew_scope(man, MAN_PP);
+               return;

        }
 
        }
 

-       assert(man->last);
+       cline = man->last->line;
+       cpos = man->last->pos;
+       ctok = man->last->tok;
+       man_unscope(man, nn);

 
 

-       if ( ! man_valid_post(man))
-               return(0);
-       if ( ! man_action_post(man))
-               return(0);
+       if (tok == MAN_RE && nn->head->aux > 0)
+               roff_setreg(man->roff, "an-margin", nn->head->aux, '-');

 
 

-       man->next = MAN_NEXT_SIBLING;
+       /* Trailing text. */

 
 

-       return(1);
-}
+       if (buf[*pos] != '\0') {
+               roff_word_alloc(man, line, ppos, buf + *pos);
+               man->last->flags |= NODE_DELIMC;
+       }

 
 

+       /* Move a trailing paragraph behind the block. */

 
 

-int
-man_macroend(struct man *m)
-{
+       if (ctok == MAN_LP || ctok == MAN_PP || ctok == MAN_P) {
+               *pos = strlen(buf);
+               blk_imp(man, ctok, cline, cpos, pos, buf);
+       }
+}

 
 

-       for ( ; m->last && m->last != m->first; 
-                       m->last = m->last->parent) {
-               if ( ! man_valid_post(m))
-                       return(0);
-               if ( ! man_action_post(m))
-                       return(0);
+void
+blk_exp(MACRO_PROT_ARGS)
+{
+       struct roff_node *head;
+       char            *p;
+       int              la;
+
+       rew_scope(man, tok);
+       roff_block_alloc(man, line, ppos, tok);
+       head = roff_head_alloc(man, line, ppos, tok);
+
+       la = *pos;
+       if (man_args(man, line, pos, buf, &p)) {
+               roff_word_alloc(man, line, la, p);
+               if (tok == MAN_RS) {
+                       if (roff_getreg(man->roff, "an-margin") == 0)
+                               roff_setreg(man->roff, "an-margin",
+                                   7 * 24, '=');
+                       if ((head->aux = strtod(p, NULL) * 24.0) > 0)
+                               roff_setreg(man->roff, "an-margin",
+                                   head->aux, '+');
+               }

        }
 
        }
 

-       if ( ! man_valid_post(m))
-               return(0);
-       if ( ! man_action_post(m))
-               return(0);
+       if (buf[*pos] != '\0')
+               mandoc_vmsg(MANDOCERR_ARG_EXCESS, man->parse, line,
+                   *pos, "%s ... %s", roff_name[tok], buf + *pos);

 
 

-       return(1);
+       man_unscope(man, head);
+       roff_body_alloc(man, line, ppos, tok);

 }
 
 }
 

-
-/* ARGSUSED */
-static int
-man_args(struct man *man, int line, 
-               int *pos, char *buf, char **v)
+/*
+ * Parse an implicit-block macro.  These contain a ROFFT_HEAD and a
+ * ROFFT_BODY contained within a ROFFT_BLOCK.  Rules for closing out other
+ * scopes, such as `SH' closing out an `SS', are defined in the rew
+ * routines.
+ */
+void
+blk_imp(MACRO_PROT_ARGS)

 {
 {

+       int              la;
+       char            *p;
+       struct roff_node *n;

 
 

-       if (0 == buf[*pos])
-               return(0);
+       rew_scope(man, tok);
+       n = roff_block_alloc(man, line, ppos, tok);
+       if (n->tok == MAN_SH || n->tok == MAN_SS)
+               man->flags &= ~MAN_LITERAL;
+       n = roff_head_alloc(man, line, ppos, tok);

 
 

-       /* First parse non-quoted strings. */
+       /* Add line arguments. */

 
 

-       if ('\"' != buf[*pos]) {
-               *v = &buf[*pos];
+       for (;;) {
+               la = *pos;
+               if ( ! man_args(man, line, pos, buf, &p))
+                       break;
+               roff_word_alloc(man, line, la, p);
+       }

 
 

-               while (buf[*pos]) {
-                       if (' ' == buf[*pos])
-                               if ('\\' != buf[*pos - 1])
-                                       break;
-                       (*pos)++;
-               }
+       /*
+        * For macros having optional next-line scope,
+        * keep the head open if there were no arguments.
+        * For `TP', always keep the head open.
+        */

 
 

-               if (0 == buf[*pos])
-                       return(1);
+       if (man_macro(tok)->flags & MAN_SCOPED &&
+           (tok == MAN_TP || tok == MAN_TQ || n == man->last)) {
+               man->flags |= MAN_BLINE;
+               return;
+       }

 
 

-               buf[(*pos)++] = 0;
+       /* Close out the head and open the body. */

 
 

-               if (0 == buf[*pos])
-                       return(1);
+       man_unscope(man, n);
+       roff_body_alloc(man, line, ppos, tok);
+}

 
 

-               while (buf[*pos] && ' ' == buf[*pos])
-                       (*pos)++;
+void
+in_line_eoln(MACRO_PROT_ARGS)
+{
+       int              la;
+       char            *p;
+       struct roff_node *n;

 
 

-               if (buf[*pos])
-                       return(1);
+       roff_elem_alloc(man, line, ppos, tok);
+       n = man->last;

 
 

-               warnx("tail whitespace");
-               return(-1);
+       for (;;) {
+               if (buf[*pos] != '\0' && (tok == MAN_fi || tok == MAN_nf)) {
+                       mandoc_vmsg(MANDOCERR_ARG_SKIP,
+                           man->parse, line, *pos, "%s %s",
+                           roff_name[tok], buf + *pos);
+                       break;
+               }
+               if (buf[*pos] != '\0' && man->last != n && tok == MAN_PD) {
+                       mandoc_vmsg(MANDOCERR_ARG_EXCESS,
+                           man->parse, line, *pos, "%s ... %s",
+                           roff_name[tok], buf + *pos);
+                       break;
+               }
+               la = *pos;
+               if ( ! man_args(man, line, pos, buf, &p))
+                       break;
+               if (man_macro(tok)->flags & MAN_JOIN &&
+                   man->last->type == ROFFT_TEXT)
+                       roff_word_append(man, p);
+               else
+                       roff_word_alloc(man, line, la, p);

        }
 
        /*
        }
 
        /*

-        * If we're a quoted string (and quoted strings are allowed),
-        * then parse ahead to the next quote.  If none's found, it's an
-        * error.  After, parse to the next word.  
+        * Append NODE_EOS in case the last snipped argument
+        * ends with a dot, e.g. `.IR syslog (3).'

         */
 
         */
 

-       *v = &buf[++(*pos)];
+       if (n != man->last &&
+           mandoc_eos(man->last->string, strlen(man->last->string)))
+               man->last->flags |= NODE_EOS;

 
 

-       while (buf[*pos] && '\"' != buf[*pos])
-               (*pos)++;
+       /*
+        * If no arguments are specified and this is MAN_SCOPED (i.e.,
+        * next-line scoped), then set our mode to indicate that we're
+        * waiting for terms to load into our context.
+        */

 
 

-       if (0 == buf[*pos]) {
-               warnx("unterminated quotation");
-               return(-1);
+       if (n == man->last && man_macro(tok)->flags & MAN_SCOPED) {
+               assert((man_macro(tok)->flags & MAN_NSCOPED) == 0);
+               man->flags |= MAN_ELINE;
+               return;

        }
 
        }
 

-       buf[(*pos)++] = 0;
-       if (0 == buf[*pos])
-               return(1);
+       assert(man->last->type != ROFFT_ROOT);
+       man->next = ROFF_NEXT_SIBLING;
+
+       /* Rewind our element scope. */
+
+       for ( ; man->last; man->last = man->last->parent) {
+               man_state(man, man->last);
+               if (man->last == n)
+                       break;
+       }
+}
+
+void
+man_endparse(struct roff_man *man)
+{
+
+       man_unscope(man, man->first);
+       man->flags &= ~MAN_LITERAL;
+}
+
+static int
+man_args(struct roff_man *man, int line, int *pos, char *buf, char **v)
+{
+       char     *start;

 
 

-       while (buf[*pos] && ' ' == buf[*pos])
-               (*pos)++;
+       assert(*pos);
+       *v = start = buf + *pos;
+       assert(' ' != *start);

 
 

-       if (buf[*pos])
-               return(1);
+       if ('\0' == *start)
+               return 0;

 
 

-       warnx("tail whitespace");
-       return(-1);
+       *v = mandoc_getarg(man->parse, v, line, pos);
+       return 1;

 }
 }