94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
/* $Id: mdoc_hash.c,v 1.16 2010/06/19 20:46:28 kristaps Exp $ */
|
|
/*
|
|
* Copyright (c) 2008, 2009 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 <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 * 12];
|
|
|
|
/*
|
|
* 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 = 12 * (tolower((u_char)p[1]) - 97);
|
|
else
|
|
major = 12 * 26;
|
|
|
|
for (j = 0; j < 12; j++)
|
|
if (UCHAR_MAX == table[major + j]) {
|
|
table[major + j] = (u_char)i;
|
|
break;
|
|
}
|
|
|
|
assert(j < 12);
|
|
}
|
|
}
|
|
|
|
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 = 12 * (tolower((u_char)p[1]) - 97);
|
|
else if ('1' == p[1])
|
|
major = 12 * 26;
|
|
else
|
|
return(MDOC_MAX);
|
|
|
|
if (p[2] && p[3])
|
|
return(MDOC_MAX);
|
|
|
|
for (j = 0; j < 12; j++) {
|
|
if (UCHAR_MAX == (i = table[major + j]))
|
|
break;
|
|
if (0 == strcmp(p, mdoc_macronames[i]))
|
|
return((enum mdoct)i);
|
|
}
|
|
|
|
return(MDOC_MAX);
|
|
}
|