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/* $Id: man_validate.c,v 1.29 2010/08/20 00:53:35 schwarze Exp $ */
/*
* 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.
*/
#include <sys/types.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include "mandoc.h"
#include "libman.h"
#include "libmandoc.h"
#define CHKARGS struct man *m, struct man_node *n
typedef int (*v_check)(CHKARGS);
struct man_valid {
v_check *pres;
v_check *posts;
};
static int check_bline(CHKARGS);
static int check_eq0(CHKARGS);
static int check_le1(CHKARGS);
static int check_ge2(CHKARGS);
static int check_le5(CHKARGS);
static int check_par(CHKARGS);
static int check_part(CHKARGS);
static int check_root(CHKARGS);
static int check_sec(CHKARGS);
static int check_text(CHKARGS);
static int check_title(CHKARGS);
static v_check posts_eq0[] = { check_eq0, NULL };
static v_check posts_th[] = { check_ge2, check_le5, check_title, NULL };
static v_check posts_par[] = { check_par, NULL };
static v_check posts_part[] = { check_part, NULL };
static v_check posts_sec[] = { check_sec, NULL };
static v_check posts_le1[] = { check_le1, NULL };
static v_check pres_bline[] = { check_bline, NULL };
static const struct man_valid man_valids[MAN_MAX] = {
{ NULL, posts_eq0 }, /* br */
{ pres_bline, posts_th }, /* TH */
{ pres_bline, posts_sec }, /* SH */
{ pres_bline, posts_sec }, /* SS */
{ pres_bline, posts_par }, /* TP */
{ pres_bline, posts_par }, /* LP */
{ pres_bline, posts_par }, /* PP */
{ pres_bline, posts_par }, /* P */
{ pres_bline, posts_par }, /* IP */
{ pres_bline, posts_par }, /* HP */
{ NULL, NULL }, /* SM */
{ NULL, NULL }, /* SB */
{ NULL, NULL }, /* BI */
{ NULL, NULL }, /* IB */
{ NULL, NULL }, /* BR */
{ NULL, NULL }, /* RB */
{ NULL, NULL }, /* R */
{ NULL, NULL }, /* B */
{ NULL, NULL }, /* I */
{ NULL, NULL }, /* IR */
{ NULL, NULL }, /* RI */
{ NULL, posts_eq0 }, /* na */ /* FIXME: should warn only. */
{ NULL, NULL }, /* i */
{ NULL, posts_le1 }, /* sp */ /* FIXME: should warn only. */
{ pres_bline, posts_eq0 }, /* nf */
{ pres_bline, posts_eq0 }, /* fi */
{ NULL, NULL }, /* r */
{ NULL, NULL }, /* RE */
{ NULL, posts_part }, /* RS */
{ NULL, NULL }, /* DT */
{ NULL, NULL }, /* UC */
{ NULL, NULL }, /* PD */
{ NULL, posts_le1 }, /* Sp */ /* FIXME: should warn only. */
{ pres_bline, posts_le1 }, /* Vb */ /* FIXME: should warn only. */
{ pres_bline, posts_eq0 }, /* Ve */
{ NULL, NULL }, /* AT */
{ NULL, NULL }, /* in */
};
int
man_valid_pre(struct man *m, struct man_node *n)
{
v_check *cp;
if (MAN_TEXT == n->type)
return(1);
if (MAN_ROOT == n->type)
return(1);
if (NULL == (cp = man_valids[n->tok].pres))
return(1);
for ( ; *cp; cp++)
if ( ! (*cp)(m, n))
return(0);
return(1);
}
int
man_valid_post(struct man *m)
{
v_check *cp;
if (MAN_VALID & m->last->flags)
return(1);
m->last->flags |= MAN_VALID;
switch (m->last->type) {
case (MAN_TEXT):
return(check_text(m, m->last));
case (MAN_ROOT):
return(check_root(m, m->last));
default:
break;
}
if (NULL == (cp = man_valids[m->last->tok].posts))
return(1);
for ( ; *cp; cp++)
if ( ! (*cp)(m, m->last))
return(0);
return(1);
}
static int
check_root(CHKARGS)
{
if (MAN_BLINE & m->flags)
return(man_nmsg(m, n, MANDOCERR_SCOPEEXIT));
if (MAN_ELINE & m->flags)
return(man_nmsg(m, n, MANDOCERR_SCOPEEXIT));
m->flags &= ~MAN_BLINE;
m->flags &= ~MAN_ELINE;
if (NULL == m->first->child) {
man_nmsg(m, n, MANDOCERR_NODOCBODY);
return(0);
} else if (NULL == m->meta.title) {
if ( ! man_nmsg(m, n, MANDOCERR_NOTITLE))
return(0);
/*
* If a title hasn't been set, do so now (by
* implication, date and section also aren't set).
*
* FIXME: this should be in man_action.c.
*/
m->meta.title = mandoc_strdup("unknown");
m->meta.date = time(NULL);
m->meta.msec = mandoc_strdup("1");
}
return(1);
}
static int
check_title(CHKARGS)
{
const char *p;
assert(n->child);
/* FIXME: is this sufficient? */
if ('\0' == *n->child->string) {
man_nmsg(m, n, MANDOCERR_SYNTARGCOUNT);
return(0);
}
for (p = n->child->string; '\0' != *p; p++)
if (isalpha((u_char)*p) && ! isupper((u_char)*p))
if ( ! man_nmsg(m, n, MANDOCERR_UPPERCASE))
return(0);
return(1);
}
static int
check_text(CHKARGS)
{
char *p;
int pos, c;
size_t sz;
for (p = n->string, pos = n->pos + 1; *p; p++, pos++) {
sz = strcspn(p, "\t\\");
p += (int)sz;
if ('\0' == *p)
break;
pos += (int)sz;
if ('\t' == *p) {
if (MAN_LITERAL & m->flags)
continue;
if (man_pmsg(m, n->line, pos, MANDOCERR_BADTAB))
continue;
return(0);
}
/* Check the special character. */
c = mandoc_special(p);
if (c) {
p += c - 1;
pos += c - 1;
} else
man_pmsg(m, n->line, pos, MANDOCERR_BADESCAPE);
}
return(1);
}
#define INEQ_DEFINE(x, ineq, name) \
static int \
check_##name(CHKARGS) \
{ \
if (n->nchild ineq (x)) \
return(1); \
man_vmsg(m, MANDOCERR_SYNTARGCOUNT, n->line, n->pos, \
"line arguments %s %d (have %d)", \
#ineq, (x), n->nchild); \
return(0); \
}
INEQ_DEFINE(0, ==, eq0)
INEQ_DEFINE(1, <=, le1)
INEQ_DEFINE(2, >=, ge2)
INEQ_DEFINE(5, <=, le5)
static int
check_sec(CHKARGS)
{
if (MAN_HEAD == n->type && 0 == n->nchild) {
man_nmsg(m, n, MANDOCERR_SYNTARGCOUNT);
return(0);
} else if (MAN_BODY == n->type && 0 == n->nchild)
return(man_nmsg(m, n, MANDOCERR_NOBODY));
return(1);
}
static int
check_part(CHKARGS)
{
if (MAN_BODY == n->type && 0 == n->nchild)
return(man_nmsg(m, n, MANDOCERR_NOBODY));
return(1);
}
static int
check_par(CHKARGS)
{
if (MAN_BODY == n->type)
switch (n->tok) {
case (MAN_IP):
/* FALLTHROUGH */
case (MAN_HP):
/* FALLTHROUGH */
case (MAN_TP):
/* Body-less lists are ok. */
break;
default:
if (n->nchild)
break;
return(man_nmsg(m, n, MANDOCERR_NOBODY));
}
if (MAN_HEAD == n->type)
switch (n->tok) {
case (MAN_PP):
/* FALLTHROUGH */
case (MAN_P):
/* FALLTHROUGH */
case (MAN_LP):
if (0 == n->nchild)
break;
return(man_nmsg(m, n, MANDOCERR_ARGSLOST));
default:
if (n->nchild)
break;
return(man_nmsg(m, n, MANDOCERR_NOARGS));
}
return(1);
}
static int
check_bline(CHKARGS)
{
assert( ! (MAN_ELINE & m->flags));
if (MAN_BLINE & m->flags) {
man_nmsg(m, n, MANDOCERR_SYNTLINESCOPE);
return(0);
}
return(1);
}
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