Return to mdoc_hash.c CVS log

Up to [cvsweb.bsd.lv] / mandoc

Annotation of mandoc/mdoc_hash.c, Revision 1.15

1.15    ! kristaps    1: /*     $Id: mdoc_hash.c,v 1.14 2010/05/08 07:30:19 kristaps Exp $ */
1.1       kristaps    2: /*
1.4       kristaps    3:  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
1.1       kristaps    4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
1.3       kristaps    6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    8:  *
1.3       kristaps    9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1       kristaps   16:  */
1.12      kristaps   17: #ifdef HAVE_CONFIG_H
                     18: #include "config.h"
                     19: #endif
                     20:
1.8       kristaps   21: #include <sys/types.h>
                     22:
1.1       kristaps   23: #include <assert.h>
                     24: #include <ctype.h>
1.9       kristaps   25: #include <limits.h>
1.1       kristaps   26: #include <stdlib.h>
                     27: #include <stdio.h>
                     28: #include <string.h>
                     29:
1.15    ! kristaps   30: #include "mandoc.h"
1.1       kristaps   31: #include "libmdoc.h"
                     32:
1.10      kristaps   33: static u_char           table[27 * 12];
1.6       kristaps   34:
1.11      kristaps   35: /*
                     36:  * XXX - this hash has global scope, so if intended for use as a library
                     37:  * with multiple callers, it will need re-invocation protection.
                     38:  */
1.1       kristaps   39: void
1.9       kristaps   40: mdoc_hash_init(void)
1.1       kristaps   41: {
1.9       kristaps   42:        int              i, j, major;
                     43:        const char      *p;
1.1       kristaps   44:
1.9       kristaps   45:        memset(table, UCHAR_MAX, sizeof(table));
1.1       kristaps   46:
1.14      kristaps   47:        for (i = 0; i < (int)MDOC_MAX; i++) {
1.9       kristaps   48:                p = mdoc_macronames[i];
1.1       kristaps   49:
1.9       kristaps   50:                if (isalpha((u_char)p[1]))
                     51:                        major = 12 * (tolower((u_char)p[1]) - 97);
                     52:                else
                     53:                        major = 12 * 26;
                     54:
                     55:                for (j = 0; j < 12; j++)
                     56:                        if (UCHAR_MAX == table[major + j]) {
1.10      kristaps   57:                                table[major + j] = (u_char)i;
1.9       kristaps   58:                                break;
                     59:                        }
1.1       kristaps   60:
1.9       kristaps   61:                assert(j < 12);
1.1       kristaps   62:        }
                     63: }
                     64:
1.13      kristaps   65: enum mdoct
1.9       kristaps   66: mdoc_hash_find(const char *p)
1.1       kristaps   67: {
1.9       kristaps   68:        int               major, i, j;
1.1       kristaps   69:
1.9       kristaps   70:        if (0 == p[0])
1.6       kristaps   71:                return(MDOC_MAX);
1.9       kristaps   72:        if ( ! isalpha((u_char)p[0]) && '%' != p[0])
1.1       kristaps   73:                return(MDOC_MAX);
1.6       kristaps   74:
1.9       kristaps   75:        if (isalpha((u_char)p[1]))
                     76:                major = 12 * (tolower((u_char)p[1]) - 97);
                     77:        else if ('1' == p[1])
                     78:                major = 12 * 26;
                     79:        else
1.1       kristaps   80:                return(MDOC_MAX);
                     81:
1.9       kristaps   82:        if (p[2] && p[3])
1.1       kristaps   83:                return(MDOC_MAX);
                     84:
1.9       kristaps   85:        for (j = 0; j < 12; j++) {
                     86:                if (UCHAR_MAX == (i = table[major + j]))
                     87:                        break;
                     88:                if (0 == strcmp(p, mdoc_macronames[i]))
1.13      kristaps   89:                        return((enum mdoct)i);
1.1       kristaps   90:        }
                     91:
                     92:        return(MDOC_MAX);
                     93: }