/* $Id$ */
/*
* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2012, 2013, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
* Copyright (c) 2013 Franco Fichtner <franco@lastsummer.de>
*
* 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.
*/
#include "config.h"
#include <sys/types.h>
#include <assert.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "man.h"
#include "mandoc.h"
#include "libmandoc.h"
#include "libman.h"
enum rew {
REW_REWIND,
REW_NOHALT,
REW_HALT
};
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 man *, int,
int *, char *, char **);
static void 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 *);
const struct man_macro __man_macros[MAN_MAX] = {
{ in_line_eoln, MAN_NSCOPED }, /* br */
{ 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 }, /* 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 }, /* sp */
{ in_line_eoln, MAN_BSCOPE }, /* nf */
{ in_line_eoln, MAN_BSCOPE }, /* 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, 0 }, /* in */
{ in_line_eoln, 0 }, /* ft */
{ 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 */
{ in_line_eoln, 0 }, /* ll */
};
const struct man_macro * const man_macros = __man_macros;
void
man_unscope(struct man *man, const struct man_node *to)
{
struct man_node *n;
to = to->parent;
n = man->last;
while (n != to) {
/* Reached the end of the document? */
if (to == NULL && ! (n->flags & MAN_VALID)) {
if (man->flags & (MAN_BLINE | MAN_ELINE) &&
man_macros[n->tok].flags & MAN_SCOPED) {
mandoc_vmsg(MANDOCERR_BLK_LINE,
man->parse, n->line, n->pos,
"EOF breaks %s",
man_macronames[n->tok]);
if (man->flags & MAN_ELINE)
man->flags &= ~MAN_ELINE;
else {
assert(n->type == MAN_HEAD);
n = n->parent;
man->flags &= ~MAN_BLINE;
}
man->last = n;
n = n->parent;
man_node_delete(man, man->last);
continue;
}
if (n->type == MAN_BLOCK &&
man_macros[n->tok].fp == blk_exp)
mandoc_msg(MANDOCERR_BLK_NOEND,
man->parse, n->line, n->pos,
man_macronames[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_valid_post(man);
}
/*
* 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) ?
MAN_NEXT_CHILD : MAN_NEXT_SIBLING;
}
static enum rew
rew_block(enum mant ntok, enum man_type type, const struct man_node *n)
{
if (type == MAN_BLOCK && ntok == n->parent->tok &&
n->parent->type == MAN_BODY)
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) {
if (man_macros[n->tok].fp == blk_exp)
return(REW_HALT);
else
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:
/* Preserve empty paragraphs before RS. */
if (0 == n->nchild && (MAN_P == n->tok ||
MAN_PP == n->tok || MAN_LP == n->tok))
return(REW_HALT);
/* 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 void
rew_scope(enum man_type type, struct man *man, enum mant tok)
{
struct man_node *n;
enum rew c;
for (n = man->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;
if (REW_REWIND == c)
break;
}
/*
* Rewind until the current point. Warn if we're a roff
* instruction that's mowing over explicit scopes.
*/
man_unscope(man, n);
}
/*
* Close out a generic explicit macro.
*/
void
blk_close(MACRO_PROT_ARGS)
{
enum mant ntok;
const struct man_node *nn;
char *p;
int 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 == MAN_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_UE:
ntok = MAN_UR;
break;
default:
abort();
/* NOTREACHED */
}
for (nn = man->last->parent; nn; nn = nn->parent)
if (nn->tok == ntok && nn->type == MAN_BLOCK && ! --nrew)
break;
if (nn == NULL) {
mandoc_msg(MANDOCERR_BLK_NOTOPEN, man->parse,
line, ppos, man_macronames[tok]);
rew_scope(MAN_BLOCK, man, MAN_PP);
} else {
line = man->last->line;
ppos = man->last->pos;
ntok = man->last->tok;
man_unscope(man, nn);
/* Move a trailing paragraph behind the block. */
if (ntok == MAN_LP || ntok == MAN_PP || ntok == MAN_P) {
*pos = strlen(buf);
blk_imp(man, ntok, line, ppos, pos, buf);
}
}
}
void
blk_exp(MACRO_PROT_ARGS)
{
struct man_node *head;
char *p;
int la;
rew_scope(MAN_BLOCK, man, tok);
man_block_alloc(man, line, ppos, tok);
man_head_alloc(man, line, ppos, tok);
head = man->last;
la = *pos;
if (man_args(man, line, pos, buf, &p))
man_word_alloc(man, line, la, p);
if (buf[*pos] != '\0')
mandoc_vmsg(MANDOCERR_ARG_EXCESS,
man->parse, line, *pos, "%s ... %s",
man_macronames[tok], buf + *pos);
man_unscope(man, head);
man_body_alloc(man, 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.
*/
void
blk_imp(MACRO_PROT_ARGS)
{
int la;
char *p;
struct man_node *n;
rew_scope(MAN_BODY, man, tok);
rew_scope(MAN_BLOCK, man, tok);
man_block_alloc(man, line, ppos, tok);
man_head_alloc(man, line, ppos, tok);
n = man->last;
/* Add line arguments. */
for (;;) {
la = *pos;
if ( ! man_args(man, line, pos, buf, &p))
break;
man_word_alloc(man, line, la, p);
}
/*
* For macros having optional next-line scope,
* keep the head open if there were no arguments.
* For `TP', always keep the head open.
*/
if (man_macros[tok].flags & MAN_SCOPED &&
(tok == MAN_TP || n == man->last)) {
man->flags |= MAN_BLINE;
return;
}
/* Close out the head and open the body. */
rew_scope(MAN_HEAD, man, tok);
man_body_alloc(man, line, ppos, tok);
}
void
in_line_eoln(MACRO_PROT_ARGS)
{
int la;
char *p;
struct man_node *n;
man_elem_alloc(man, line, ppos, tok);
n = man->last;
for (;;) {
if (buf[*pos] != '\0' && (tok == MAN_br ||
tok == MAN_fi || tok == MAN_nf)) {
mandoc_vmsg(MANDOCERR_ARG_SKIP,
man->parse, line, *pos, "%s %s",
man_macronames[tok], buf + *pos);
break;
}
if (buf[*pos] != '\0' && man->last != n &&
(tok == MAN_PD || tok == MAN_ft || tok == MAN_sp)) {
mandoc_vmsg(MANDOCERR_ARG_EXCESS,
man->parse, line, *pos, "%s ... %s",
man_macronames[tok], buf + *pos);
break;
}
la = *pos;
if ( ! man_args(man, line, pos, buf, &p))
break;
if (man_macros[tok].flags & MAN_JOIN &&
man->last->type == MAN_TEXT)
man_word_append(man, p);
else
man_word_alloc(man, line, la, p);
}
/*
* Append MAN_EOS in case the last snipped argument
* ends with a dot, e.g. `.IR syslog (3).'
*/
if (n != man->last &&
mandoc_eos(man->last->string, strlen(man->last->string)))
man->last->flags |= MAN_EOS;
/*
* 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 == man->last && man_macros[tok].flags & MAN_SCOPED) {
assert( ! (man_macros[tok].flags & MAN_NSCOPED));
man->flags |= MAN_ELINE;
return;
}
assert(man->last->type != MAN_ROOT);
man->next = MAN_NEXT_SIBLING;
/*
* 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 ( ; man->last; man->last = man->last->parent) {
if (man->last == n)
break;
if (man->last->type == MAN_ROOT)
break;
man_valid_post(man);
}
assert(man->last);
/*
* Same here regarding whether we're back at the root.
*/
if (man->last->type != MAN_ROOT)
man_valid_post(man);
}
void
man_macroend(struct man *man)
{
man_unscope(man, man->first);
}
static int
man_args(struct man *man, int line, int *pos, char *buf, char **v)
{
char *start;
assert(*pos);
*v = start = buf + *pos;
assert(' ' != *start);
if ('\0' == *start)
return(0);
*v = mandoc_getarg(man->parse, v, line, pos);
return(1);
}
