Return to mdoc_hash.c CVS log

Up to [local] / src / usr.bin / mandoc

Unified error and warning message system for all of mandoc,
featuring three message levels, as agreed during the mandoc hackathon:
* FATAL parser failure, cannot produce any output from this input file:
  eventually, we hope to convert most of these to ERRORs.
* ERROR, meaning mandoc cannot cope fully with the input syntax and will
  probably lose information or produce structurally garbled output;
  it will try to produce output anyway but exit non-zero at the end,
  which is eventually intended to make the ports infrastructure happy.
* WARNING, meaning you should clean up the input file, but output
  is probably mostly OK, so this will not cause error-exit at the end.
This commit is mostly just converting the old system to the new one; before
the classification will become really reliable, we must check all messages.

In particular,
* set up a new central message string table in main.c
* drop the old message string tables from man.c and mdoc.c
* get rid of the piece-meal merr enums in libman and libmdoc
* reduce number of error/warning functions from 16 to 6 (still a lot...)

While here, handle a few problems more gracefully:
* allow .Rv and .Ex to work without a prior .Nm
* allow .An to ignore extra arguments
* allow undeclared columns in .Bl -column

Written by kristaps@.

/*	$Id: mdoc_hash.c,v 1.10 2010/05/23 22:45:00 schwarze Exp $ */
/*
 * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
 *
 * 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 <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "mandoc.h"
#include "libmdoc.h"

static	u_char		 table[27 * 13];

/*
 * XXX - this hash has global scope, so if intended for use as a library
 * with multiple callers, it will need re-invocation protection.
 */
void
mdoc_hash_init(void)
{
	int		 i, j, major;
	const char	*p;

	memset(table, UCHAR_MAX, sizeof(table));

	for (i = 0; i < (int)MDOC_MAX; i++) {
		p = mdoc_macronames[i];

		if (isalpha((u_char)p[1]))
			major = 13 * (tolower((u_char)p[1]) - 97);
		else
			major = 13 * 26;

		for (j = 0; j < 13; j++)
			if (UCHAR_MAX == table[major + j]) {
				table[major + j] = (u_char)i;
				break;
			}

		assert(j < 13);
	}
}

enum mdoct
mdoc_hash_find(const char *p)
{
	int		  major, i, j;

	if (0 == p[0])
		return(MDOC_MAX);
	if ( ! isalpha((u_char)p[0]) && '%' != p[0])
		return(MDOC_MAX);

	if (isalpha((u_char)p[1]))
		major = 13 * (tolower((u_char)p[1]) - 97);
	else if ('1' == p[1])
		major = 13 * 26;
	else 
		return(MDOC_MAX);

	if (p[2] && p[3])
		return(MDOC_MAX);

	for (j = 0; j < 13; j++) {
		if (UCHAR_MAX == (i = table[major + j]))
			break;
		if (0 == strcmp(p, mdoc_macronames[i]))
			return((enum mdoct)i);
	}

	return(MDOC_MAX);
}