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ef7476572c
freebsd-nq/mdoc_macro.c
Baptiste Daroussin ef7476572c Import mandoc cvs snapshot 20170121 (pre 1.14)
2017-01-21 13:01:39 +00:00

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/* $Id: mdoc_macro.c,v 1.210 2017/01/10 13:47:00 schwarze Exp $ */
/*
* Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2010, 2012-2016 Ingo Schwarze <schwarze@openbsd.org>
*
* 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.
*
* 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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include "mandoc.h"
#include "roff.h"
#include "mdoc.h"
#include "libmandoc.h"
#include "roff_int.h"
#include "libmdoc.h"
static void blk_full(MACRO_PROT_ARGS);
static void blk_exp_close(MACRO_PROT_ARGS);
static void blk_part_exp(MACRO_PROT_ARGS);
static void blk_part_imp(MACRO_PROT_ARGS);
static void ctx_synopsis(MACRO_PROT_ARGS);
static void in_line_eoln(MACRO_PROT_ARGS);
static void in_line_argn(MACRO_PROT_ARGS);
static void in_line(MACRO_PROT_ARGS);
static void phrase_ta(MACRO_PROT_ARGS);
static void append_delims(struct roff_man *, int, int *, char *);
static void dword(struct roff_man *, int, int, const char *,
enum mdelim, int);
static int find_pending(struct roff_man *, int, int, int,
struct roff_node *);
static int lookup(struct roff_man *, int, int, int, const char *);
static int macro_or_word(MACRO_PROT_ARGS, int);
static int parse_rest(struct roff_man *, int, int, int *, char *);
static int rew_alt(int);
static void rew_elem(struct roff_man *, int);
static void rew_last(struct roff_man *, const struct roff_node *);
static void rew_pending(struct roff_man *,
const struct roff_node *);
const struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ap */
{ in_line_eoln, MDOC_PROLOGUE }, /* Dd */
{ in_line_eoln, MDOC_PROLOGUE }, /* Dt */
{ in_line_eoln, MDOC_PROLOGUE }, /* Os */
{ blk_full, MDOC_PARSED | MDOC_JOIN }, /* Sh */
{ blk_full, MDOC_PARSED | MDOC_JOIN }, /* Ss */
{ in_line_eoln, 0 }, /* Pp */
{ blk_part_imp, MDOC_PARSED | MDOC_JOIN }, /* D1 */
{ blk_part_imp, MDOC_PARSED | MDOC_JOIN }, /* Dl */
{ blk_full, MDOC_EXPLICIT }, /* Bd */
{ blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Ed */
{ blk_full, MDOC_EXPLICIT }, /* Bl */
{ blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* El */
{ blk_full, MDOC_PARSED | MDOC_JOIN }, /* It */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */
{ in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* An */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
{ in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Cd */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cm */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dv */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Er */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ev */
{ in_line_eoln, 0 }, /* Ex */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fa */
{ in_line_eoln, 0 }, /* Fd */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fl */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fn */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ft */
{ in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ic */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* In */
{ in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Li */
{ blk_full, MDOC_JOIN }, /* Nd */
{ ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Nm */
{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Op */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ot */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pa */
{ in_line_eoln, 0 }, /* Rv */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* St */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Va */
{ ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Vt */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Xr */
{ in_line_eoln, MDOC_JOIN }, /* %A */
{ in_line_eoln, MDOC_JOIN }, /* %B */
{ in_line_eoln, MDOC_JOIN }, /* %D */
{ in_line_eoln, MDOC_JOIN }, /* %I */
{ in_line_eoln, MDOC_JOIN }, /* %J */
{ in_line_eoln, 0 }, /* %N */
{ in_line_eoln, MDOC_JOIN }, /* %O */
{ in_line_eoln, 0 }, /* %P */
{ in_line_eoln, MDOC_JOIN }, /* %R */
{ in_line_eoln, MDOC_JOIN }, /* %T */
{ in_line_eoln, 0 }, /* %V */
{ blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Ac */
{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Ao */
{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Aq */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* At */
{ blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Bc */
{ blk_full, MDOC_EXPLICIT }, /* Bf */
{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Bo */
{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Bq */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bsx */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bx */
{ in_line_eoln, 0 }, /* Db */
{ blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Dc */
{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Do */
{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Dq */
{ blk_exp_close, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Ec */
{ blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Ef */
{ in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Em */
{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Eo */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Fx */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ms */
{ in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* No */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED |
MDOC_IGNDELIM | MDOC_JOIN }, /* Ns */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Nx */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ox */
{ blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Pc */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_IGNDELIM }, /* Pf */
{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Po */
{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Pq */
{ blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Qc */
{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ql */
{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Qo */
{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Qq */
{ blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Re */
{ blk_full, MDOC_EXPLICIT }, /* Rs */
{ blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Sc */
{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* So */
{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Sq */
{ in_line_argn, 0 }, /* Sm */
{ in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Sx */
{ in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Sy */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Tn */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ux */
{ blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Xo */
{ blk_full, MDOC_EXPLICIT | MDOC_CALLABLE }, /* Fo */
{ blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Fc */
{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Oo */
{ blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Oc */
{ blk_full, MDOC_EXPLICIT }, /* Bk */
{ blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Ek */
{ in_line_eoln, 0 }, /* Bt */
{ in_line_eoln, 0 }, /* Hf */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fr */
{ in_line_eoln, 0 }, /* Ud */
{ in_line, 0 }, /* Lb */
{ in_line_eoln, 0 }, /* Lp */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Lk */
{ in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Mt */
{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Brq */
{ blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Bro */
{ blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
MDOC_EXPLICIT | MDOC_JOIN }, /* Brc */
{ in_line_eoln, MDOC_JOIN }, /* %C */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Es */
{ blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* En */
{ in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Dx */
{ in_line_eoln, MDOC_JOIN }, /* %Q */
{ in_line_eoln, 0 }, /* br */
{ in_line_eoln, 0 }, /* sp */
{ in_line_eoln, 0 }, /* %U */
{ phrase_ta, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ta */
{ in_line_eoln, MDOC_PROLOGUE }, /* ll */
};
const struct mdoc_macro * const mdoc_macros = __mdoc_macros;
/*
* This is called at the end of parsing. It must traverse up the tree,
* closing out open [implicit] scopes. Obviously, open explicit scopes
* are errors.
*/
void
mdoc_endparse(struct roff_man *mdoc)
{
struct roff_node *n;
/* Scan for open explicit scopes. */
n = mdoc->last->flags & NODE_VALID ?
mdoc->last->parent : mdoc->last;
for ( ; n; n = n->parent)
if (n->type == ROFFT_BLOCK &&
mdoc_macros[n->tok].flags & MDOC_EXPLICIT)
mandoc_msg(MANDOCERR_BLK_NOEND, mdoc->parse,
n->line, n->pos, mdoc_macronames[n->tok]);
/* Rewind to the first. */
rew_last(mdoc, mdoc->first);
mdoc_state_reset(mdoc);
}
/*
* Look up the macro at *p called by "from",
* or as a line macro if from == TOKEN_NONE.
*/
static int
lookup(struct roff_man *mdoc, int from, int line, int ppos, const char *p)
{
int res;
if (mdoc->flags & MDOC_PHRASEQF) {
mdoc->flags &= ~MDOC_PHRASEQF;
return TOKEN_NONE;
}
if (from == TOKEN_NONE || mdoc_macros[from].flags & MDOC_PARSED) {
res = mdoc_hash_find(p);
if (res != TOKEN_NONE) {
if (mdoc_macros[res].flags & MDOC_CALLABLE)
return res;
if (res != MDOC_br && res != MDOC_sp && res != MDOC_ll)
mandoc_msg(MANDOCERR_MACRO_CALL,
mdoc->parse, line, ppos, p);
}
}
return TOKEN_NONE;
}
/*
* Rewind up to and including a specific node.
*/
static void
rew_last(struct roff_man *mdoc, const struct roff_node *to)
{
if (to->flags & NODE_VALID)
return;
while (mdoc->last != to) {
mdoc_state(mdoc, mdoc->last);
mdoc->last->flags |= NODE_VALID | NODE_ENDED;
mdoc->last = mdoc->last->parent;
}
mdoc_state(mdoc, mdoc->last);
mdoc->last->flags |= NODE_VALID | NODE_ENDED;
mdoc->next = ROFF_NEXT_SIBLING;
}
/*
* Rewind up to a specific block, including all blocks that broke it.
*/
static void
rew_pending(struct roff_man *mdoc, const struct roff_node *n)
{
for (;;) {
rew_last(mdoc, n);
if (mdoc->last == n) {
switch (n->type) {
case ROFFT_HEAD:
roff_body_alloc(mdoc, n->line, n->pos,
n->tok);
break;
case ROFFT_BLOCK:
break;
default:
return;
}
if ( ! (n->flags & NODE_BROKEN))
return;
} else
n = mdoc->last;
for (;;) {
if ((n = n->parent) == NULL)
return;
if (n->type == ROFFT_BLOCK ||
n->type == ROFFT_HEAD) {
if (n->flags & NODE_ENDED)
break;
else
return;
}
}
}
}
/*
* For a block closing macro, return the corresponding opening one.
* Otherwise, return the macro itself.
*/
static int
rew_alt(int tok)
{
switch (tok) {
case MDOC_Ac:
return MDOC_Ao;
case MDOC_Bc:
return MDOC_Bo;
case MDOC_Brc:
return MDOC_Bro;
case MDOC_Dc:
return MDOC_Do;
case MDOC_Ec:
return MDOC_Eo;
case MDOC_Ed:
return MDOC_Bd;
case MDOC_Ef:
return MDOC_Bf;
case MDOC_Ek:
return MDOC_Bk;
case MDOC_El:
return MDOC_Bl;
case MDOC_Fc:
return MDOC_Fo;
case MDOC_Oc:
return MDOC_Oo;
case MDOC_Pc:
return MDOC_Po;
case MDOC_Qc:
return MDOC_Qo;
case MDOC_Re:
return MDOC_Rs;
case MDOC_Sc:
return MDOC_So;
case MDOC_Xc:
return MDOC_Xo;
default:
return tok;
}
}
static void
rew_elem(struct roff_man *mdoc, int tok)
{
struct roff_node *n;
n = mdoc->last;
if (n->type != ROFFT_ELEM)
n = n->parent;
assert(n->type == ROFFT_ELEM);
assert(tok == n->tok);
rew_last(mdoc, n);
}
/*
* If there is an open sub-block of the target requiring
* explicit close-out, postpone closing out the target until
* the rew_pending() call closing out the sub-block.
*/
static int
find_pending(struct roff_man *mdoc, int tok, int line, int ppos,
struct roff_node *target)
{
struct roff_node *n;
int irc;
irc = 0;
for (n = mdoc->last; n != NULL && n != target; n = n->parent) {
if (n->flags & NODE_ENDED) {
if ( ! (n->flags & NODE_VALID))
n->flags |= NODE_BROKEN;
continue;
}
if (n->type == ROFFT_BLOCK &&
mdoc_macros[n->tok].flags & MDOC_EXPLICIT) {
irc = 1;
n->flags = NODE_BROKEN;
if (target->type == ROFFT_HEAD)
target->flags = NODE_ENDED;
else if ( ! (target->flags & NODE_ENDED)) {
mandoc_vmsg(MANDOCERR_BLK_NEST,
mdoc->parse, line, ppos,
"%s breaks %s", mdoc_macronames[tok],
mdoc_macronames[n->tok]);
mdoc_endbody_alloc(mdoc, line, ppos,
tok, target, ENDBODY_NOSPACE);
}
}
}
return irc;
}
/*
* Allocate a word and check whether it's punctuation or not.
* Punctuation consists of those tokens found in mdoc_isdelim().
*/
static void
dword(struct roff_man *mdoc, int line, int col, const char *p,
enum mdelim d, int may_append)
{
if (d == DELIM_MAX)
d = mdoc_isdelim(p);
if (may_append &&
! (mdoc->flags & (MDOC_SYNOPSIS | MDOC_KEEP | MDOC_SMOFF)) &&
d == DELIM_NONE && mdoc->last->type == ROFFT_TEXT &&
mdoc_isdelim(mdoc->last->string) == DELIM_NONE) {
roff_word_append(mdoc, p);
return;
}
roff_word_alloc(mdoc, line, col, p);
/*
* If the word consists of a bare delimiter,
* flag the new node accordingly,
* unless doing so was vetoed by the invoking macro.
* Always clear the veto, it is only valid for one word.
*/
if (d == DELIM_OPEN)
mdoc->last->flags |= NODE_DELIMO;
else if (d == DELIM_CLOSE &&
! (mdoc->flags & MDOC_NODELIMC) &&
mdoc->last->parent->tok != MDOC_Fd)
mdoc->last->flags |= NODE_DELIMC;
mdoc->flags &= ~MDOC_NODELIMC;
}
static void
append_delims(struct roff_man *mdoc, int line, int *pos, char *buf)
{
char *p;
int la;
if (buf[*pos] == '\0')
return;
for (;;) {
la = *pos;
if (mdoc_args(mdoc, line, pos, buf, TOKEN_NONE, &p) ==
ARGS_EOLN)
break;
dword(mdoc, line, la, p, DELIM_MAX, 1);
/*
* If we encounter end-of-sentence symbols, then trigger
* the double-space.
*
* XXX: it's easy to allow this to propagate outward to
* the last symbol, such that `. )' will cause the
* correct double-spacing. However, (1) groff isn't
* smart enough to do this and (2) it would require
* knowing which symbols break this behaviour, for
* example, `. ;' shouldn't propagate the double-space.
*/
if (mandoc_eos(p, strlen(p)))
mdoc->last->flags |= NODE_EOS;
}
}
/*
* Parse one word.
* If it is a macro, call it and return 1.
* Otherwise, allocate it and return 0.
*/
static int
macro_or_word(MACRO_PROT_ARGS, int parsed)
{
char *p;
int ntok;
p = buf + ppos;
ntok = TOKEN_NONE;
if (*p == '"')
p++;
else if (parsed && ! (mdoc->flags & MDOC_PHRASELIT))
ntok = lookup(mdoc, tok, line, ppos, p);
if (ntok == TOKEN_NONE) {
dword(mdoc, line, ppos, p, DELIM_MAX, tok == TOKEN_NONE ||
mdoc_macros[tok].flags & MDOC_JOIN);
return 0;
} else {
if (mdoc_macros[tok].fp == in_line_eoln)
rew_elem(mdoc, tok);
mdoc_macro(mdoc, ntok, line, ppos, pos, buf);
if (tok == TOKEN_NONE)
append_delims(mdoc, line, pos, buf);
return 1;
}
}
/*
* Close out block partial/full explicit.
*/
static void
blk_exp_close(MACRO_PROT_ARGS)
{
struct roff_node *body; /* Our own body. */
struct roff_node *endbody; /* Our own end marker. */
struct roff_node *itblk; /* An It block starting later. */
struct roff_node *later; /* A sub-block starting later. */
struct roff_node *n; /* Search back to our block. */
struct roff_node *target; /* For find_pending(). */
int j, lastarg, maxargs, nl, pending;
enum margserr ac;
int atok, ntok;
char *p;
nl = MDOC_NEWLINE & mdoc->flags;
switch (tok) {
case MDOC_Ec:
maxargs = 1;
break;
case MDOC_Ek:
mdoc->flags &= ~MDOC_KEEP;
/* FALLTHROUGH */
default:
maxargs = 0;
break;
}
/* Search backwards for the beginning of our own body. */
atok = rew_alt(tok);
body = NULL;
for (n = mdoc->last; n; n = n->parent) {
if (n->flags & NODE_ENDED || n->tok != atok ||
n->type != ROFFT_BODY || n->end != ENDBODY_NOT)
continue;
body = n;
break;
}
/*
* Search backwards for beginnings of blocks,
* both of our own and of pending sub-blocks.
*/
endbody = itblk = later = NULL;
for (n = mdoc->last; n; n = n->parent) {
if (n->flags & NODE_ENDED) {
if ( ! (n->flags & NODE_VALID))
n->flags |= NODE_BROKEN;
continue;
}
/*
* Mismatching end macros can never break anything,
* SYNOPSIS name blocks can never be broken,
* and we only care about the breaking of BLOCKs.
*/
if (body == NULL ||
n->tok == MDOC_Nm ||
n->type != ROFFT_BLOCK)
continue;
if (n->tok == MDOC_It) {
itblk = n;
continue;
}
if (atok == n->tok) {
assert(body);
/*
* Found the start of our own block.
* When there is no pending sub block,
* just proceed to closing out.
*/
if (later == NULL ||
(tok == MDOC_El && itblk == NULL))
break;
/*
* When there is a pending sub block, postpone
* closing out the current block until the
* rew_pending() closing out the sub-block.
* Mark the place where the formatting - but not
* the scope - of the current block ends.
*/
mandoc_vmsg(MANDOCERR_BLK_NEST, mdoc->parse,
line, ppos, "%s breaks %s",
mdoc_macronames[atok],
mdoc_macronames[later->tok]);
endbody = mdoc_endbody_alloc(mdoc, line, ppos,
atok, body, ENDBODY_SPACE);
if (tok == MDOC_El)
itblk->flags |= NODE_ENDED | NODE_BROKEN;
/*
* If a block closing macro taking arguments
* breaks another block, put the arguments
* into the end marker.
*/
if (maxargs)
mdoc->next = ROFF_NEXT_CHILD;
break;
}
/* Explicit blocks close out description lines. */
if (n->tok == MDOC_Nd) {
rew_last(mdoc, n);
continue;
}
/* Breaking an open sub block. */
n->flags |= NODE_BROKEN;
if (later == NULL)
later = n;
}
if (body == NULL) {
mandoc_msg(MANDOCERR_BLK_NOTOPEN, mdoc->parse,
line, ppos, mdoc_macronames[tok]);
if (maxargs && endbody == NULL) {
/*
* Stray .Ec without previous .Eo:
* Break the output line, keep the arguments.
*/
roff_elem_alloc(mdoc, line, ppos, MDOC_br);
rew_elem(mdoc, MDOC_br);
}
} else if (endbody == NULL) {
rew_last(mdoc, body);
if (maxargs)
mdoc_tail_alloc(mdoc, line, ppos, atok);
}
if ( ! (mdoc_macros[tok].flags & MDOC_PARSED)) {
if (buf[*pos] != '\0')
mandoc_vmsg(MANDOCERR_ARG_SKIP,
mdoc->parse, line, ppos,
"%s %s", mdoc_macronames[tok],
buf + *pos);
if (endbody == NULL && n != NULL)
rew_pending(mdoc, n);
return;
}
if (endbody != NULL)
n = endbody;
ntok = TOKEN_NONE;
for (j = 0; ; j++) {
lastarg = *pos;
if (j == maxargs && n != NULL)
rew_last(mdoc, n);
ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
if (ac == ARGS_PUNCT || ac == ARGS_EOLN)
break;
ntok = ac == ARGS_QWORD ? TOKEN_NONE :
lookup(mdoc, tok, line, lastarg, p);
if (ntok == TOKEN_NONE) {
dword(mdoc, line, lastarg, p, DELIM_MAX,
MDOC_JOIN & mdoc_macros[tok].flags);
continue;
}
if (n != NULL)
rew_last(mdoc, n);
mdoc->flags &= ~MDOC_NEWLINE;
mdoc_macro(mdoc, ntok, line, lastarg, pos, buf);
break;
}
if (n != NULL) {
if (ntok != TOKEN_NONE && n->flags & NODE_BROKEN) {
target = n;
do
target = target->parent;
while ( ! (target->flags & NODE_ENDED));
pending = find_pending(mdoc, ntok, line, ppos,
target);
} else
pending = 0;
if ( ! pending)
rew_pending(mdoc, n);
}
if (nl)
append_delims(mdoc, line, pos, buf);
}
static void
in_line(MACRO_PROT_ARGS)
{
int la, scope, cnt, firstarg, mayopen, nc, nl;
int ntok;
enum margserr ac;
enum mdelim d;
struct mdoc_arg *arg;
char *p;
nl = MDOC_NEWLINE & mdoc->flags;
/*
* Whether we allow ignored elements (those without content,
* usually because of reserved words) to squeak by.
*/
switch (tok) {
case MDOC_An:
case MDOC_Ar:
case MDOC_Fl:
case MDOC_Mt:
case MDOC_Nm:
case MDOC_Pa:
nc = 1;
break;
default:
nc = 0;
break;
}
mdoc_argv(mdoc, line, tok, &arg, pos, buf);
d = DELIM_NONE;
firstarg = 1;
mayopen = 1;
for (cnt = scope = 0;; ) {
la = *pos;
ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
/*
* At the end of a macro line,
* opening delimiters do not suppress spacing.
*/
if (ac == ARGS_EOLN) {
if (d == DELIM_OPEN)
mdoc->last->flags &= ~NODE_DELIMO;
break;
}
/*
* The rest of the macro line is only punctuation,
* to be handled by append_delims().
* If there were no other arguments,
* do not allow the first one to suppress spacing,
* even if it turns out to be a closing one.
*/
if (ac == ARGS_PUNCT) {
if (cnt == 0 && (nc == 0 || tok == MDOC_An))
mdoc->flags |= MDOC_NODELIMC;
break;
}
ntok = (ac == ARGS_QWORD || (tok == MDOC_Fn && !cnt)) ?
TOKEN_NONE : lookup(mdoc, tok, line, la, p);
/*
* In this case, we've located a submacro and must
* execute it. Close out scope, if open. If no
* elements have been generated, either create one (nc)
* or raise a warning.
*/
if (ntok != TOKEN_NONE) {
if (scope)
rew_elem(mdoc, tok);
if (nc && ! cnt) {
mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
rew_last(mdoc, mdoc->last);
} else if ( ! nc && ! cnt) {
mdoc_argv_free(arg);
mandoc_msg(MANDOCERR_MACRO_EMPTY,
mdoc->parse, line, ppos,
mdoc_macronames[tok]);
}
mdoc_macro(mdoc, ntok, line, la, pos, buf);
if (nl)
append_delims(mdoc, line, pos, buf);
return;
}
/*
* Non-quote-enclosed punctuation. Set up our scope, if
* a word; rewind the scope, if a delimiter; then append
* the word.
*/
d = ac == ARGS_QWORD ? DELIM_NONE : mdoc_isdelim(p);
if (DELIM_NONE != d) {
/*
* If we encounter closing punctuation, no word
* has been emitted, no scope is open, and we're
* allowed to have an empty element, then start
* a new scope.
*/
if ((d == DELIM_CLOSE ||
(d == DELIM_MIDDLE && tok == MDOC_Fl)) &&
!cnt && !scope && nc && mayopen) {
mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
scope = 1;
cnt++;
if (tok == MDOC_Nm)
mayopen = 0;
}
/*
* Close out our scope, if one is open, before
* any punctuation.
*/
if (scope)
rew_elem(mdoc, tok);
scope = 0;
if (tok == MDOC_Fn)
mayopen = 0;
} else if (mayopen && !scope) {
mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
scope = 1;
cnt++;
}
dword(mdoc, line, la, p, d,
MDOC_JOIN & mdoc_macros[tok].flags);
/*
* If the first argument is a closing delimiter,
* do not suppress spacing before it.
*/
if (firstarg && d == DELIM_CLOSE && !nc)
mdoc->last->flags &= ~NODE_DELIMC;
firstarg = 0;
/*
* `Fl' macros have their scope re-opened with each new
* word so that the `-' can be added to each one without
* having to parse out spaces.
*/
if (scope && tok == MDOC_Fl) {
rew_elem(mdoc, tok);
scope = 0;
}
}
if (scope)
rew_elem(mdoc, tok);
/*
* If no elements have been collected and we're allowed to have
* empties (nc), open a scope and close it out. Otherwise,
* raise a warning.
*/
if ( ! cnt) {
if (nc) {
mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
rew_last(mdoc, mdoc->last);
} else {
mdoc_argv_free(arg);
mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
line, ppos, mdoc_macronames[tok]);
}
}
if (nl)
append_delims(mdoc, line, pos, buf);
}
static void
blk_full(MACRO_PROT_ARGS)
{
int la, nl, parsed;
struct mdoc_arg *arg;
struct roff_node *blk; /* Our own or a broken block. */
struct roff_node *head; /* Our own head. */
struct roff_node *body; /* Our own body. */
struct roff_node *n;
enum margserr ac, lac;
char *p;
nl = MDOC_NEWLINE & mdoc->flags;
if (buf[*pos] == '\0' && (tok == MDOC_Sh || tok == MDOC_Ss)) {
mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
line, ppos, mdoc_macronames[tok]);
return;
}
if ( ! (mdoc_macros[tok].flags & MDOC_EXPLICIT)) {
/* Here, tok is one of Sh Ss Nm Nd It. */
blk = NULL;
for (n = mdoc->last; n != NULL; n = n->parent) {
if (n->flags & NODE_ENDED) {
if ( ! (n->flags & NODE_VALID))
n->flags |= NODE_BROKEN;
continue;
}
if (n->type != ROFFT_BLOCK)
continue;
if (tok == MDOC_It && n->tok == MDOC_Bl) {
if (blk != NULL) {
mandoc_vmsg(MANDOCERR_BLK_BROKEN,
mdoc->parse, line, ppos,
"It breaks %s",
mdoc_macronames[blk->tok]);
rew_pending(mdoc, blk);
}
break;
}
if (mdoc_macros[n->tok].flags & MDOC_EXPLICIT) {
switch (tok) {
case MDOC_Sh:
case MDOC_Ss:
mandoc_vmsg(MANDOCERR_BLK_BROKEN,
mdoc->parse, line, ppos,
"%s breaks %s",
mdoc_macronames[tok],
mdoc_macronames[n->tok]);
rew_pending(mdoc, n);
n = mdoc->last;
continue;
case MDOC_It:
/* Delay in case it's astray. */
blk = n;
continue;
default:
break;
}
break;
}
/* Here, n is one of Sh Ss Nm Nd It. */
if (tok != MDOC_Sh && (n->tok == MDOC_Sh ||
(tok != MDOC_Ss && (n->tok == MDOC_Ss ||
(tok != MDOC_It && n->tok == MDOC_It)))))
break;
/* Item breaking an explicit block. */
if (blk != NULL) {
mandoc_vmsg(MANDOCERR_BLK_BROKEN,
mdoc->parse, line, ppos,
"It breaks %s",
mdoc_macronames[blk->tok]);
rew_pending(mdoc, blk);
blk = NULL;
}
/* Close out prior implicit scopes. */
rew_last(mdoc, n);
}
/* Skip items outside lists. */
if (tok == MDOC_It && (n == NULL || n->tok != MDOC_Bl)) {
mandoc_vmsg(MANDOCERR_IT_STRAY, mdoc->parse,
line, ppos, "It %s", buf + *pos);
roff_elem_alloc(mdoc, line, ppos, MDOC_br);
rew_elem(mdoc, MDOC_br);
return;
}
}
/*
* This routine accommodates implicitly- and explicitly-scoped
* macro openings. Implicit ones first close out prior scope
* (seen above). Delay opening the head until necessary to
* allow leading punctuation to print. Special consideration
* for `It -column', which has phrase-part syntax instead of
* regular child nodes.
*/
mdoc_argv(mdoc, line, tok, &arg, pos, buf);
blk = mdoc_block_alloc(mdoc, line, ppos, tok, arg);
head = body = NULL;
/*
* Exception: Heads of `It' macros in `-diag' lists are not
* parsed, even though `It' macros in general are parsed.
*/
parsed = tok != MDOC_It ||
mdoc->last->parent->tok != MDOC_Bl ||
mdoc->last->parent->norm->Bl.type != LIST_diag;
/*
* The `Nd' macro has all arguments in its body: it's a hybrid
* of block partial-explicit and full-implicit. Stupid.
*/
if (tok == MDOC_Nd) {
head = roff_head_alloc(mdoc, line, ppos, tok);
rew_last(mdoc, head);
body = roff_body_alloc(mdoc, line, ppos, tok);
}
if (tok == MDOC_Bk)
mdoc->flags |= MDOC_KEEP;
ac = ARGS_EOLN;
for (;;) {
/*
* If we are right after a tab character,
* do not parse the first word for macros.
*/
if (mdoc->flags & MDOC_PHRASEQN) {
mdoc->flags &= ~MDOC_PHRASEQN;
mdoc->flags |= MDOC_PHRASEQF;
}
la = *pos;
lac = ac;
ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
if (ac == ARGS_EOLN) {
if (lac != ARGS_PHRASE ||
! (mdoc->flags & MDOC_PHRASEQF))
break;
/*
* This line ends in a tab; start the next
* column now, with a leading blank.
*/
if (body != NULL)
rew_last(mdoc, body);
body = roff_body_alloc(mdoc, line, ppos, tok);
roff_word_alloc(mdoc, line, ppos, "\\&");
break;
}
if (tok == MDOC_Bd || tok == MDOC_Bk) {
mandoc_vmsg(MANDOCERR_ARG_EXCESS,
mdoc->parse, line, la, "%s ... %s",
mdoc_macronames[tok], buf + la);
break;
}
if (tok == MDOC_Rs) {
mandoc_vmsg(MANDOCERR_ARG_SKIP, mdoc->parse,
line, la, "Rs %s", buf + la);
break;
}
if (ac == ARGS_PUNCT)
break;
/*
* Emit leading punctuation (i.e., punctuation before
* the ROFFT_HEAD) for non-phrase types.
*/
if (head == NULL &&
ac != ARGS_PHRASE &&
ac != ARGS_QWORD &&
mdoc_isdelim(p) == DELIM_OPEN) {
dword(mdoc, line, la, p, DELIM_OPEN, 0);
continue;
}
/* Open a head if one hasn't been opened. */
if (head == NULL)
head = roff_head_alloc(mdoc, line, ppos, tok);
if (ac == ARGS_PHRASE) {
/*
* If we haven't opened a body yet, rewind the
* head; if we have, rewind that instead.
*/
rew_last(mdoc, body == NULL ? head : body);
body = roff_body_alloc(mdoc, line, ppos, tok);
/* Process to the tab or to the end of the line. */
mdoc->flags |= MDOC_PHRASE;
parse_rest(mdoc, TOKEN_NONE, line, &la, buf);
mdoc->flags &= ~MDOC_PHRASE;
/* There may have been `Ta' macros. */
while (body->next != NULL)
body = body->next;
continue;
}
if (macro_or_word(mdoc, tok, line, la, pos, buf, parsed))
break;
}
if (blk->flags & NODE_VALID)
return;
if (head == NULL)
head = roff_head_alloc(mdoc, line, ppos, tok);
if (nl && tok != MDOC_Bd && tok != MDOC_Bl && tok != MDOC_Rs)
append_delims(mdoc, line, pos, buf);
if (body != NULL)
goto out;
if (find_pending(mdoc, tok, line, ppos, head))
return;
/* Close out scopes to remain in a consistent state. */
rew_last(mdoc, head);
body = roff_body_alloc(mdoc, line, ppos, tok);
out:
if (mdoc->flags & MDOC_FREECOL) {
rew_last(mdoc, body);
rew_last(mdoc, blk);
mdoc->flags &= ~MDOC_FREECOL;
}
}
static void
blk_part_imp(MACRO_PROT_ARGS)
{
int la, nl;
enum margserr ac;
char *p;
struct roff_node *blk; /* saved block context */
struct roff_node *body; /* saved body context */
struct roff_node *n;
nl = MDOC_NEWLINE & mdoc->flags;
/*
* A macro that spans to the end of the line. This is generally
* (but not necessarily) called as the first macro. The block
* has a head as the immediate child, which is always empty,
* followed by zero or more opening punctuation nodes, then the
* body (which may be empty, depending on the macro), then zero
* or more closing punctuation nodes.
*/
blk = mdoc_block_alloc(mdoc, line, ppos, tok, NULL);
rew_last(mdoc, roff_head_alloc(mdoc, line, ppos, tok));
/*
* Open the body scope "on-demand", that is, after we've
* processed all our the leading delimiters (open parenthesis,
* etc.).
*/
for (body = NULL; ; ) {
la = *pos;
ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
if (ac == ARGS_EOLN || ac == ARGS_PUNCT)
break;
if (body == NULL && ac != ARGS_QWORD &&
mdoc_isdelim(p) == DELIM_OPEN) {
dword(mdoc, line, la, p, DELIM_OPEN, 0);
continue;
}
if (body == NULL)
body = roff_body_alloc(mdoc, line, ppos, tok);
if (macro_or_word(mdoc, tok, line, la, pos, buf, 1))
break;
}
if (body == NULL)
body = roff_body_alloc(mdoc, line, ppos, tok);
if (find_pending(mdoc, tok, line, ppos, body))
return;
rew_last(mdoc, body);
if (nl)
append_delims(mdoc, line, pos, buf);
rew_pending(mdoc, blk);
/* Move trailing .Ns out of scope. */
for (n = body->child; n && n->next; n = n->next)
/* Do nothing. */ ;
if (n && n->tok == MDOC_Ns)
mdoc_node_relink(mdoc, n);
}
static void
blk_part_exp(MACRO_PROT_ARGS)
{
int la, nl;
enum margserr ac;
struct roff_node *head; /* keep track of head */
char *p;
nl = MDOC_NEWLINE & mdoc->flags;
/*
* The opening of an explicit macro having zero or more leading
* punctuation nodes; a head with optional single element (the
* case of `Eo'); and a body that may be empty.
*/
roff_block_alloc(mdoc, line, ppos, tok);
head = NULL;
for (;;) {
la = *pos;
ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
if (ac == ARGS_PUNCT || ac == ARGS_EOLN)
break;
/* Flush out leading punctuation. */
if (head == NULL && ac != ARGS_QWORD &&
mdoc_isdelim(p) == DELIM_OPEN) {
dword(mdoc, line, la, p, DELIM_OPEN, 0);
continue;
}
if (head == NULL) {
head = roff_head_alloc(mdoc, line, ppos, tok);
if (tok == MDOC_Eo) /* Not parsed. */
dword(mdoc, line, la, p, DELIM_MAX, 0);
rew_last(mdoc, head);
roff_body_alloc(mdoc, line, ppos, tok);
if (tok == MDOC_Eo)
continue;
}
if (macro_or_word(mdoc, tok, line, la, pos, buf, 1))
break;
}
/* Clean-up to leave in a consistent state. */
if (head == NULL) {
rew_last(mdoc, roff_head_alloc(mdoc, line, ppos, tok));
roff_body_alloc(mdoc, line, ppos, tok);
}
if (nl)
append_delims(mdoc, line, pos, buf);
}
static void
in_line_argn(MACRO_PROT_ARGS)
{
struct mdoc_arg *arg;
char *p;
enum margserr ac;
int ntok;
int state; /* arg#; -1: not yet open; -2: closed */
int la, maxargs, nl;
nl = mdoc->flags & MDOC_NEWLINE;
/*
* A line macro that has a fixed number of arguments (maxargs).
* Only open the scope once the first non-leading-punctuation is
* found (unless MDOC_IGNDELIM is noted, like in `Pf'), then
* keep it open until the maximum number of arguments are
* exhausted.
*/
switch (tok) {
case MDOC_Ap:
case MDOC_Ns:
case MDOC_Ux:
maxargs = 0;
break;
case MDOC_Bx:
case MDOC_Es:
case MDOC_Xr:
maxargs = 2;
break;
default:
maxargs = 1;
break;
}
mdoc_argv(mdoc, line, tok, &arg, pos, buf);
state = -1;
p = NULL;
for (;;) {
la = *pos;
ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
if (ac == ARGS_WORD && state == -1 &&
! (mdoc_macros[tok].flags & MDOC_IGNDELIM) &&
mdoc_isdelim(p) == DELIM_OPEN) {
dword(mdoc, line, la, p, DELIM_OPEN, 0);
continue;
}
if (state == -1 && tok != MDOC_In &&
tok != MDOC_St && tok != MDOC_Xr) {
mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
state = 0;
}
if (ac == ARGS_PUNCT || ac == ARGS_EOLN) {
if (abs(state) < 2 && tok == MDOC_Pf)
mandoc_vmsg(MANDOCERR_PF_SKIP,
mdoc->parse, line, ppos, "Pf %s",
p == NULL ? "at eol" : p);
break;
}
if (state == maxargs) {
rew_elem(mdoc, tok);
state = -2;
}
ntok = (ac == ARGS_QWORD || (tok == MDOC_Pf && state == 0)) ?
TOKEN_NONE : lookup(mdoc, tok, line, la, p);
if (ntok != TOKEN_NONE) {
if (state >= 0) {
rew_elem(mdoc, tok);
state = -2;
}
mdoc_macro(mdoc, ntok, line, la, pos, buf);
break;
}
if (ac == ARGS_QWORD ||
mdoc_macros[tok].flags & MDOC_IGNDELIM ||
mdoc_isdelim(p) == DELIM_NONE) {
if (state == -1) {
mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
state = 1;
} else if (state >= 0)
state++;
} else if (state >= 0) {
rew_elem(mdoc, tok);
state = -2;
}
dword(mdoc, line, la, p, DELIM_MAX,
MDOC_JOIN & mdoc_macros[tok].flags);
}
if (state == -1) {
mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
line, ppos, mdoc_macronames[tok]);
return;
}
if (state == 0 && tok == MDOC_Pf)
append_delims(mdoc, line, pos, buf);
if (state >= 0)
rew_elem(mdoc, tok);
if (nl)
append_delims(mdoc, line, pos, buf);
}
static void
in_line_eoln(MACRO_PROT_ARGS)
{
struct roff_node *n;
struct mdoc_arg *arg;
if ((tok == MDOC_Pp || tok == MDOC_Lp) &&
! (mdoc->flags & MDOC_SYNOPSIS)) {
n = mdoc->last;
if (mdoc->next == ROFF_NEXT_SIBLING)
n = n->parent;
if (n->tok == MDOC_Nm)
rew_last(mdoc, n->parent);
}
if (buf[*pos] == '\0' &&
(tok == MDOC_Fd || mdoc_macronames[tok][0] == '%')) {
mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
line, ppos, mdoc_macronames[tok]);
return;
}
mdoc_argv(mdoc, line, tok, &arg, pos, buf);
mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
if (parse_rest(mdoc, tok, line, pos, buf))
return;
rew_elem(mdoc, tok);
}
/*
* The simplest argument parser available: Parse the remaining
* words until the end of the phrase or line and return 0
* or until the next macro, call that macro, and return 1.
*/
static int
parse_rest(struct roff_man *mdoc, int tok, int line, int *pos, char *buf)
{
int la;
for (;;) {
la = *pos;
if (mdoc_args(mdoc, line, pos, buf, tok, NULL) == ARGS_EOLN)
return 0;
if (macro_or_word(mdoc, tok, line, la, pos, buf, 1))
return 1;
}
}
static void
ctx_synopsis(MACRO_PROT_ARGS)
{
if (~mdoc->flags & (MDOC_SYNOPSIS | MDOC_NEWLINE))
in_line(mdoc, tok, line, ppos, pos, buf);
else if (tok == MDOC_Nm)
blk_full(mdoc, tok, line, ppos, pos, buf);
else {
assert(tok == MDOC_Vt);
blk_part_imp(mdoc, tok, line, ppos, pos, buf);
}
}
/*
* Phrases occur within `Bl -column' entries, separated by `Ta' or tabs.
* They're unusual because they're basically free-form text until a
* macro is encountered.
*/
static void
phrase_ta(MACRO_PROT_ARGS)
{
struct roff_node *body, *n;
/* Make sure we are in a column list or ignore this macro. */
body = NULL;
for (n = mdoc->last; n != NULL; n = n->parent) {
if (n->flags & NODE_ENDED)
continue;
if (n->tok == MDOC_It && n->type == ROFFT_BODY)
body = n;
if (n->tok == MDOC_Bl && n->end == ENDBODY_NOT)
break;
}
if (n == NULL || n->norm->Bl.type != LIST_column) {
mandoc_msg(MANDOCERR_TA_STRAY, mdoc->parse,
line, ppos, "Ta");
return;
}
/* Advance to the next column. */
rew_last(mdoc, body);
roff_body_alloc(mdoc, line, ppos, MDOC_It);
parse_rest(mdoc, TOKEN_NONE, line, pos, buf);
}
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