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/* $OpenBSD: roff_validate.c,v 1.18 2018/12/31 09:02:30 schwarze Exp $ */
/*
* Copyright (c) 2010, 2017, 2018 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 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 <sys/types.h>
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include "mandoc.h"
#include "roff.h"
#include "libmandoc.h"
#include "roff_int.h"
#define ROFF_VALID_ARGS struct roff_man *man, struct roff_node *n
typedef void (*roff_valid_fp)(ROFF_VALID_ARGS);
static void roff_valid_br(ROFF_VALID_ARGS);
static void roff_valid_fi(ROFF_VALID_ARGS);
static void roff_valid_ft(ROFF_VALID_ARGS);
static void roff_valid_nf(ROFF_VALID_ARGS);
static void roff_valid_sp(ROFF_VALID_ARGS);
static const roff_valid_fp roff_valids[ROFF_MAX] = {
roff_valid_br, /* br */
NULL, /* ce */
roff_valid_fi, /* fi */
roff_valid_ft, /* ft */
NULL, /* ll */
NULL, /* mc */
roff_valid_nf, /* nf */
NULL, /* po */
NULL, /* rj */
roff_valid_sp, /* sp */
NULL, /* ta */
NULL, /* ti */
};
void
roff_validate(struct roff_man *man)
{
struct roff_node *n;
n = man->last;
assert(n->tok < ROFF_MAX);
if (roff_valids[n->tok] != NULL)
(*roff_valids[n->tok])(man, n);
}
static void
roff_valid_br(ROFF_VALID_ARGS)
{
struct roff_node *np;
if (n->next != NULL && n->next->type == ROFFT_TEXT &&
*n->next->string == ' ') {
mandoc_msg(MANDOCERR_PAR_SKIP, n->line, n->pos,
"br before text line with leading blank");
roff_node_delete(man, n);
return;
}
if ((np = n->prev) == NULL)
return;
switch (np->tok) {
case ROFF_br:
case ROFF_sp:
case MDOC_Pp:
mandoc_msg(MANDOCERR_PAR_SKIP,
n->line, n->pos, "br after %s", roff_name[np->tok]);
roff_node_delete(man, n);
break;
default:
break;
}
}
static void
roff_valid_fi(ROFF_VALID_ARGS)
{
if ((n->flags & NODE_NOFILL) == 0)
mandoc_msg(MANDOCERR_FI_SKIP, n->line, n->pos, "fi");
}
static void
roff_valid_ft(ROFF_VALID_ARGS)
{
const char *cp;
if (n->child == NULL) {
man->next = ROFF_NEXT_CHILD;
roff_word_alloc(man, n->line, n->pos, "P");
man->last = n;
return;
}
cp = n->child->string;
if (mandoc_font(cp, (int)strlen(cp)) != ESCAPE_ERROR)
return;
mandoc_msg(MANDOCERR_FT_BAD, n->line, n->pos, "ft %s", cp);
roff_node_delete(man, n);
}
static void
roff_valid_nf(ROFF_VALID_ARGS)
{
if (n->flags & NODE_NOFILL)
mandoc_msg(MANDOCERR_NF_SKIP, n->line, n->pos, "nf");
}
static void
roff_valid_sp(ROFF_VALID_ARGS)
{
struct roff_node *np;
if ((np = n->prev) == NULL)
return;
switch (np->tok) {
case ROFF_br:
mandoc_msg(MANDOCERR_PAR_SKIP,
np->line, np->pos, "br before sp");
roff_node_delete(man, np);
break;
case MDOC_Pp:
mandoc_msg(MANDOCERR_PAR_SKIP,
n->line, n->pos, "sp after Pp");
roff_node_delete(man, n);
break;
default:
break;
}
}
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