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Annotation of mandoc/mdoc_hash.c, Revision 1.26

1.26    ! schwarze    1: /*     $Id: mdoc_hash.c,v 1.25 2015/04/19 14:00:19 schwarze Exp $ */
1.1       kristaps    2: /*
1.16      kristaps    3:  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
1.26    ! schwarze    4:  * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
1.1       kristaps    5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
1.3       kristaps    7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    9:  *
1.3       kristaps   10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1       kristaps   17:  */
1.12      kristaps   18: #include "config.h"
                     19:
1.8       kristaps   20: #include <sys/types.h>
                     21:
1.1       kristaps   22: #include <assert.h>
                     23: #include <ctype.h>
1.9       kristaps   24: #include <limits.h>
1.1       kristaps   25: #include <stdlib.h>
                     26: #include <stdio.h>
                     27: #include <string.h>
                     28:
1.22      schwarze   29: #include "roff.h"
1.17      kristaps   30: #include "mdoc.h"
1.1       kristaps   31: #include "libmdoc.h"
                     32:
1.18      kristaps   33: static unsigned char    table[27 * 12];
1.6       kristaps   34:
1.20      schwarze   35:
1.1       kristaps   36: void
1.9       kristaps   37: mdoc_hash_init(void)
1.1       kristaps   38: {
1.9       kristaps   39:        int              i, j, major;
                     40:        const char      *p;
1.24      schwarze   41:
                     42:        if (*table != '\0')
                     43:                return;
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:
1.18      kristaps   50:                if (isalpha((unsigned char)p[1]))
                     51:                        major = 12 * (tolower((unsigned char)p[1]) - 97);
1.9       kristaps   52:                else
                     53:                        major = 12 * 26;
                     54:
                     55:                for (j = 0; j < 12; j++)
                     56:                        if (UCHAR_MAX == table[major + j]) {
1.18      kristaps   57:                                table[major + j] = (unsigned 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:
1.23      schwarze   65: int
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])
1.26    ! schwarze   71:                return TOKEN_NONE;
1.18      kristaps   72:        if ( ! isalpha((unsigned char)p[0]) && '%' != p[0])
1.26    ! schwarze   73:                return TOKEN_NONE;
1.6       kristaps   74:
1.18      kristaps   75:        if (isalpha((unsigned char)p[1]))
                     76:                major = 12 * (tolower((unsigned char)p[1]) - 97);
1.9       kristaps   77:        else if ('1' == p[1])
                     78:                major = 12 * 26;
1.20      schwarze   79:        else
1.26    ! schwarze   80:                return TOKEN_NONE;
1.1       kristaps   81:
1.9       kristaps   82:        if (p[2] && p[3])
1.26    ! schwarze   83:                return TOKEN_NONE;
1.1       kristaps   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]))
1.26    ! schwarze   89:                        return i;
1.1       kristaps   90:        }
                     91:
1.26    ! schwarze   92:        return TOKEN_NONE;
1.1       kristaps   93: }