/* $Id$ */
/*
* Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
*
* 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 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <assert.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "mandoc.h"
#include "libmandoc.h"
#include "libman.h"
enum rew {
REW_REWIND,
REW_NOHALT,
REW_HALT
};
static int blk_close(MACRO_PROT_ARGS);
static int blk_exp(MACRO_PROT_ARGS);
static int blk_imp(MACRO_PROT_ARGS);
static int in_line_eoln(MACRO_PROT_ARGS);
static int rew_scope(enum man_type,
struct man *, enum mant);
static enum rew rew_dohalt(enum mant, enum man_type,
const struct man_node *);
static enum rew rew_block(enum mant, enum man_type,
const struct man_node *);
static void rew_warn(struct man *,
struct man_node *, enum mandocerr);
const struct man_macro __man_macros[MAN_MAX] = {
{ in_line_eoln, MAN_NSCOPED }, /* br */
{ in_line_eoln, 0 }, /* TH */
{ blk_imp, MAN_SCOPED }, /* SH */
{ blk_imp, MAN_SCOPED }, /* SS */
{ blk_imp, MAN_SCOPED | MAN_FSCOPED }, /* TP */
{ blk_imp, 0 }, /* LP */
{ blk_imp, 0 }, /* PP */
{ blk_imp, 0 }, /* P */
{ blk_imp, 0 }, /* IP */
{ blk_imp, 0 }, /* HP */
{ in_line_eoln, MAN_SCOPED }, /* SM */
{ in_line_eoln, MAN_SCOPED }, /* 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 }, /* R */
{ in_line_eoln, MAN_SCOPED }, /* B */
{ in_line_eoln, MAN_SCOPED }, /* I */
{ in_line_eoln, 0 }, /* IR */
{ in_line_eoln, 0 }, /* RI */
{ in_line_eoln, MAN_NSCOPED }, /* na */
{ in_line_eoln, MAN_NSCOPED }, /* sp */
{ in_line_eoln, 0 }, /* nf */
{ in_line_eoln, 0 }, /* fi */
{ blk_close, 0 }, /* RE */
{ blk_exp, MAN_EXPLICIT }, /* RS */
{ in_line_eoln, 0 }, /* DT */
{ in_line_eoln, 0 }, /* UC */
{ in_line_eoln, 0 }, /* PD */
{ in_line_eoln, 0 }, /* AT */
{ in_line_eoln, 0 }, /* in */
{ in_line_eoln, 0 }, /* ft */
};
const struct man_macro * const man_macros = __man_macros;
/*
* Warn when "n" is an explicit non-roff macro.
*/
static void
rew_warn(struct man *m, struct man_node *n, enum mandocerr er)
{
if (er == MANDOCERR_MAX || MAN_BLOCK != n->type)
return;
if (MAN_VALID & n->flags)
return;
if ( ! (MAN_EXPLICIT & man_macros[n->tok].flags))
return;
assert(er < MANDOCERR_FATAL);
man_nmsg(m, n, er);
}
/*
* Rewind scope. If a code "er" != MANDOCERR_MAX has been provided, it
* will be used if an explicit block scope is being closed out.
*/
int
man_unscope(struct man *m, const struct man_node *to,
enum mandocerr er)
{
struct man_node *n;
assert(to);
/* LINTED */
while (m->last != to) {
/*
* Save the parent here, because we may delete the
* m->last node in the post-validation phase and reset
* it to m->last->parent, causing a step in the closing
* out to be lost.
*/
n = m->last->parent;
rew_warn(m, m->last, er);
if ( ! man_valid_post(m))
return(0);
m->last = n;
assert(m->last);
}
rew_warn(m, m->last, er);
if ( ! man_valid_post(m))
return(0);
m->next = MAN_ROOT == m->last->type ?
MAN_NEXT_CHILD : MAN_NEXT_SIBLING;
return(1);
}
static enum rew
rew_block(enum mant ntok, enum man_type type, const struct man_node *n)
{
if (MAN_BLOCK == type && ntok == n->parent->tok &&
MAN_BODY == n->parent->type)
return(REW_REWIND);
return(ntok == n->tok ? REW_HALT : REW_NOHALT);
}
/*
* There are three scope levels: scoped to the root (all), scoped to the
* section (all less sections), and scoped to subsections (all less
* sections and subsections).
*/
static enum rew
rew_dohalt(enum mant tok, enum man_type type, const struct man_node *n)
{
enum rew c;
/* We cannot progress beyond the root ever. */
if (MAN_ROOT == n->type)
return(REW_HALT);
assert(n->parent);
/* Normal nodes shouldn't go to the level of the root. */
if (MAN_ROOT == n->parent->type)
return(REW_REWIND);
/* Already-validated nodes should be closed out. */
if (MAN_VALID & n->flags)
return(REW_NOHALT);
/* First: rewind to ourselves. */
if (type == n->type && tok == n->tok)
return(REW_REWIND);
/*
* Next follow the implicit scope-smashings as defined by man.7:
* section, sub-section, etc.
*/
switch (tok) {
case (MAN_SH):
break;
case (MAN_SS):
/* Rewind to a section, if a block. */
if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
return(c);
break;
case (MAN_RS):
/* Rewind to a subsection, if a block. */
if (REW_NOHALT != (c = rew_block(MAN_SS, type, n)))
return(c);
/* Rewind to a section, if a block. */
if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
return(c);
break;
default:
/* Rewind to an offsetter, if a block. */
if (REW_NOHALT != (c = rew_block(MAN_RS, type, n)))
return(c);
/* Rewind to a subsection, if a block. */
if (REW_NOHALT != (c = rew_block(MAN_SS, type, n)))
return(c);
/* Rewind to a section, if a block. */
if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
return(c);
break;
}
return(REW_NOHALT);
}
/*
* 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 int
rew_scope(enum man_type type, struct man *m, enum mant tok)
{
struct man_node *n;
enum rew c;
/* LINTED */
for (n = m->last; n; n = n->parent) {
/*
* Whether we should stop immediately (REW_HALT), stop
* and rewind until this point (REW_REWIND), or keep
* rewinding (REW_NOHALT).
*/
c = rew_dohalt(tok, type, n);
if (REW_HALT == c)
return(1);
if (REW_REWIND == c)
break;
}
/*
* Rewind until the current point. Warn if we're a roff
* instruction that's mowing over explicit scopes.
*/
assert(n);
return(man_unscope(m, n, MANDOCERR_MAX));
}
/*
* Close out a generic explicit macro.
*/
/* ARGSUSED */
int
blk_close(MACRO_PROT_ARGS)
{
enum mant ntok;
const struct man_node *nn;
switch (tok) {
case (MAN_RE):
ntok = MAN_RS;
break;
default:
abort();
/* NOTREACHED */
}
for (nn = m->last->parent; nn; nn = nn->parent)
if (ntok == nn->tok)
break;
if (NULL == nn)
man_pmsg(m, line, ppos, MANDOCERR_NOSCOPE);
if ( ! rew_scope(MAN_BODY, m, ntok))
return(0);
if ( ! rew_scope(MAN_BLOCK, m, ntok))
return(0);
return(1);
}
/* ARGSUSED */
int
blk_exp(MACRO_PROT_ARGS)
{
int w, la;
char *p;
/*
* Close out prior scopes. "Regular" explicit macros cannot be
* nested, but we allow roff macros to be placed just about
* anywhere.
*/
if ( ! rew_scope(MAN_BODY, m, tok))
return(0);
if ( ! rew_scope(MAN_BLOCK, m, tok))
return(0);
if ( ! man_block_alloc(m, line, ppos, tok))
return(0);
if ( ! man_head_alloc(m, line, ppos, tok))
return(0);
for (;;) {
la = *pos;
w = man_args(m, line, pos, buf, &p);
if (-1 == w)
return(0);
if (0 == w)
break;
if ( ! man_word_alloc(m, line, la, p))
return(0);
}
assert(m);
assert(tok != MAN_MAX);
if ( ! rew_scope(MAN_HEAD, m, tok))
return(0);
return(man_body_alloc(m, line, ppos, tok));
}
/*
* Parse an implicit-block macro. These contain a MAN_HEAD and a
* MAN_BODY contained within a MAN_BLOCK. Rules for closing out other
* scopes, such as `SH' closing out an `SS', are defined in the rew
* routines.
*/
/* ARGSUSED */
int
blk_imp(MACRO_PROT_ARGS)
{
int w, la;
char *p;
struct man_node *n;
/* Close out prior scopes. */
if ( ! rew_scope(MAN_BODY, m, tok))
return(0);
if ( ! rew_scope(MAN_BLOCK, m, tok))
return(0);
/* Allocate new block & head scope. */
if ( ! man_block_alloc(m, line, ppos, tok))
return(0);
if ( ! man_head_alloc(m, line, ppos, tok))
return(0);
n = m->last;
/* Add line arguments. */
for (;;) {
la = *pos;
w = man_args(m, line, pos, buf, &p);
if (-1 == w)
return(0);
if (0 == w)
break;
if ( ! man_word_alloc(m, line, la, p))
return(0);
}
/* Close out head and open body (unless MAN_SCOPE). */
if (MAN_SCOPED & man_macros[tok].flags) {
/* If we're forcing scope (`TP'), keep it open. */
if (MAN_FSCOPED & man_macros[tok].flags) {
m->flags |= MAN_BLINE;
return(1);
} else if (n == m->last) {
m->flags |= MAN_BLINE;
return(1);
}
}
if ( ! rew_scope(MAN_HEAD, m, tok))
return(0);
return(man_body_alloc(m, line, ppos, tok));
}
/* ARGSUSED */
int
in_line_eoln(MACRO_PROT_ARGS)
{
int w, la;
char *p;
struct man_node *n;
if ( ! man_elem_alloc(m, line, ppos, tok))
return(0);
n = m->last;
for (;;) {
la = *pos;
w = man_args(m, line, pos, buf, &p);
if (-1 == w)
return(0);
if (0 == w)
break;
if ( ! man_word_alloc(m, line, la, p))
return(0);
}
/*
* 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 (n == m->last && MAN_SCOPED & man_macros[tok].flags) {
assert( ! (MAN_NSCOPED & man_macros[tok].flags));
m->flags |= MAN_ELINE;
return(1);
}
/* Set ignorable context, if applicable. */
if (MAN_NSCOPED & man_macros[tok].flags) {
assert( ! (MAN_SCOPED & man_macros[tok].flags));
m->flags |= MAN_ILINE;
}
/*
* Rewind our element scope. Note that when TH is pruned, we'll
* be back at the root, so make sure that we don't clobber as
* its sibling.
*/
for ( ; m->last; m->last = m->last->parent) {
if (m->last == n)
break;
if (m->last->type == MAN_ROOT)
break;
if ( ! man_valid_post(m))
return(0);
}
assert(m->last);
/*
* Same here regarding whether we're back at the root.
*/
if (m->last->type != MAN_ROOT && ! man_valid_post(m))
return(0);
m->next = MAN_ROOT == m->last->type ?
MAN_NEXT_CHILD : MAN_NEXT_SIBLING;
return(1);
}
int
man_macroend(struct man *m)
{
return(man_unscope(m, m->first, MANDOCERR_SCOPEEXIT));
}
