static int
rew_sub(enum mdoc_type t, struct mdoc *mdoc,
enum mdoct tok, int line, int ppos)
{
struct mdoc_node *n;
n = mdoc->last;
while (n) {
switch (rew_dohalt(tok, t, n)) {
case (REWIND_NONE):
return(1);
case (REWIND_THIS):
n->lastline = line -
(MDOC_NEWLINE & mdoc->flags &&
! (MDOC_EXPLICIT & mdoc_macros[tok].flags));
break;
case (REWIND_FORCE):
mandoc_vmsg(MANDOCERR_SCOPEBROKEN, mdoc->parse,
line, ppos, "%s breaks %s",
mdoc_macronames[tok],
mdoc_macronames[n->tok]);
/* FALLTHROUGH */
case (REWIND_MORE):
n->lastline = line -
(MDOC_NEWLINE & mdoc->flags ? 1 : 0);
n = n->parent;
continue;
case (REWIND_LATER):
if (make_pending(n, tok, mdoc, line, ppos) ||
MDOC_BLOCK != t)
return(1);
/* FALLTHROUGH */
case (REWIND_ERROR):
mdoc_pmsg(mdoc, line, ppos, MANDOCERR_NOSCOPE);
return(1);
}
break;
}
assert(n);
if ( ! rew_last(mdoc, n))
return(0);
/*
* The current block extends an enclosing block.
* Now that the current block ends, close the enclosing block, too.
*/
while (NULL != (n = n->pending)) {
if ( ! rew_last(mdoc, n))
return(0);
if (MDOC_HEAD == n->type &&
! mdoc_body_alloc(mdoc, n->line, n->pos, n->tok))
return(0);
}
return(1);
}
/*
* Close out block partial/full explicit.
*/
static int
blk_exp_close(MACRO_PROT_ARGS)
{
struct mdoc_node *body; /* Our own body. */
struct mdoc_node *later; /* A sub-block starting later. */
struct mdoc_node *n; /* For searching backwards. */
int j, lastarg, maxargs, flushed, nl;
enum margserr ac;
enum mdoct atok, ntok;
char *p;
nl = MDOC_NEWLINE & m->flags;
switch (tok) {
case (MDOC_Ec):
maxargs = 1;
break;
default:
maxargs = 0;
break;
}
/*
* Search backwards for beginnings of blocks,
* both of our own and of pending sub-blocks.
*/
atok = rew_alt(tok);
body = later = NULL;
for (n = m->last; n; n = n->parent) {
if (MDOC_VALID & n->flags)
continue;
/* Remember the start of our own body. */
if (MDOC_BODY == n->type && atok == n->tok) {
if (ENDBODY_NOT == n->end)
body = n;
continue;
}
if (MDOC_BLOCK != n->type || MDOC_Nm == n->tok)
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 (NULL == later)
break;
/*
* When there is a pending sub block,
* postpone closing out the current block
* until the rew_sub() closing out the sub-block.
*/
make_pending(later, tok, m, line, ppos);
/*
* Mark the place where the formatting - but not
* the scope - of the current block ends.
*/
if ( ! mdoc_endbody_alloc(m, line, ppos,
atok, body, ENDBODY_SPACE))
return(0);
break;
}
/*
* When finding an open sub block, remember the last
* open explicit block, or, in case there are only
* implicit ones, the first open implicit block.
*/
if (later &&
MDOC_EXPLICIT & mdoc_macros[later->tok].flags)
continue;
if (MDOC_CALLABLE & mdoc_macros[n->tok].flags)
later = n;
}
if ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags)) {
/* FIXME: do this in validate */
if (buf[*pos])
mdoc_pmsg(m, line, ppos, MANDOCERR_ARGSLOST);
if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
return(0);
return(rew_sub(MDOC_BLOCK, m, tok, line, ppos));
}
if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
return(0);
if (NULL == later && maxargs > 0)
if ( ! mdoc_tail_alloc(m, line, ppos, rew_alt(tok)))
return(0);
for (flushed = j = 0; ; j++) {
lastarg = *pos;
if (j == maxargs && ! flushed) {
if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
return(0);
flushed = 1;
}
ac = mdoc_args(m, line, pos, buf, tok, &p);
if (ARGS_ERROR == ac)
return(0);
if (ARGS_PUNCT == ac)
break;
if (ARGS_EOLN == ac)
break;
ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
if (MDOC_MAX == ntok) {
if ( ! dword(m, line, lastarg, p, DELIM_MAX))
return(0);
continue;
}
if ( ! flushed) {
if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
return(0);
flushed = 1;
}
if ( ! mdoc_macro(m, ntok, line, lastarg, pos, buf))
return(0);
break;
}
if ( ! flushed && ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
return(0);
if ( ! nl)
return(1);
return(append_delims(m, line, pos, buf));
}
static int
blk_part_imp(MACRO_PROT_ARGS)
{
int la, nl;
enum mdoct ntok;
enum margserr ac;
char *p;
struct mdoc_node *blk; /* saved block context */
struct mdoc_node *body; /* saved body context */
struct mdoc_node *n;
nl = MDOC_NEWLINE & m->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.
*/
if ( ! mdoc_block_alloc(m, line, ppos, tok, NULL))
return(0);
blk = m->last;
if ( ! mdoc_head_alloc(m, line, ppos, tok))
return(0);
if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
return(0);
/*
* 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(m, line, pos, buf, tok, &p);
if (ARGS_ERROR == ac)
return(0);
if (ARGS_EOLN == ac)
break;
if (ARGS_PUNCT == ac)
break;
if (NULL == body && ARGS_QWORD != ac &&
DELIM_OPEN == mdoc_isdelim(p)) {
if ( ! dword(m, line, la, p, DELIM_OPEN))
return(0);
continue;
}
if (NULL == body) {
if ( ! mdoc_body_alloc(m, line, ppos, tok))
return(0);
body = m->last;
}
ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
if (MDOC_MAX == ntok) {
if ( ! dword(m, line, la, p, DELIM_MAX))
return(0);
continue;
}
if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
return(0);
break;
}
/* Clean-ups to leave in a consistent state. */
if (NULL == body) {
if ( ! mdoc_body_alloc(m, line, ppos, tok))
return(0);
body = m->last;
}
for (n = body->child; n && n->next; n = n->next)
/* Do nothing. */ ;
/*
* End of sentence spacing: if the last node is a text node and
* has a trailing period, then mark it as being end-of-sentence.
*/
if (n && MDOC_TEXT == n->type && n->string)
if (mandoc_eos(n->string, strlen(n->string), 1))
n->flags |= MDOC_EOS;
/* Up-propagate the end-of-space flag. */
if (n && (MDOC_EOS & n->flags)) {
body->flags |= MDOC_EOS;
body->parent->flags |= MDOC_EOS;
}
/*
* If there is an open sub-block requiring explicit close-out,
* postpone closing out the current block
* until the rew_sub() call closing out the sub-block.
*/
for (n = m->last; n && n != body && n != blk->parent; n = n->parent) {
if (MDOC_BLOCK == n->type &&
MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
! (MDOC_VALID & n->flags)) {
make_pending(n, tok, m, line, ppos);
if ( ! mdoc_endbody_alloc(m, line, ppos,
tok, body, ENDBODY_NOSPACE))
return(0);
return(1);
}
}
/*
* If we can't rewind to our body, then our scope has already
* been closed by another macro (like `Oc' closing `Op'). This
* is ugly behaviour nodding its head to OpenBSD's overwhelming
* crufty use of `Op' breakage.
*/
if (n != body)
mandoc_vmsg(MANDOCERR_SCOPENEST, m->parse, line, ppos,
"%s broken", mdoc_macronames[tok]);
if (n && ! rew_sub(MDOC_BODY, m, tok, line, ppos))
return(0);
/* Standard appending of delimiters. */
if (nl && ! append_delims(m, line, pos, buf))
return(0);
/* Rewind scope, if applicable. */
if (n && ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
return(0);
return(1);
}