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Annotation of mandoc/mdoc_hash.c, Revision 1.25

1.25    ! schwarze    1: /*     $Id: mdoc_hash.c,v 1.24 2015/04/18 17:01:58 schwarze Exp $ */
1.1       kristaps    2: /*
1.16      kristaps    3:  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
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: #include "config.h"
                     18:
1.8       kristaps   19: #include <sys/types.h>
                     20:
1.1       kristaps   21: #include <assert.h>
                     22: #include <ctype.h>
1.9       kristaps   23: #include <limits.h>
1.1       kristaps   24: #include <stdlib.h>
                     25: #include <stdio.h>
                     26: #include <string.h>
                     27:
1.22      schwarze   28: #include "roff.h"
1.17      kristaps   29: #include "mdoc.h"
1.1       kristaps   30: #include "libmdoc.h"
                     31:
1.18      kristaps   32: static unsigned char    table[27 * 12];
1.6       kristaps   33:
1.20      schwarze   34:
1.1       kristaps   35: void
1.9       kristaps   36: mdoc_hash_init(void)
1.1       kristaps   37: {
1.9       kristaps   38:        int              i, j, major;
                     39:        const char      *p;
1.24      schwarze   40:
                     41:        if (*table != '\0')
                     42:                return;
1.1       kristaps   43:
1.9       kristaps   44:        memset(table, UCHAR_MAX, sizeof(table));
1.1       kristaps   45:
1.14      kristaps   46:        for (i = 0; i < (int)MDOC_MAX; i++) {
1.9       kristaps   47:                p = mdoc_macronames[i];
1.1       kristaps   48:
1.18      kristaps   49:                if (isalpha((unsigned char)p[1]))
                     50:                        major = 12 * (tolower((unsigned char)p[1]) - 97);
1.9       kristaps   51:                else
                     52:                        major = 12 * 26;
                     53:
                     54:                for (j = 0; j < 12; j++)
                     55:                        if (UCHAR_MAX == table[major + j]) {
1.18      kristaps   56:                                table[major + j] = (unsigned char)i;
1.9       kristaps   57:                                break;
                     58:                        }
1.1       kristaps   59:
1.9       kristaps   60:                assert(j < 12);
1.1       kristaps   61:        }
                     62: }
                     63:
1.23      schwarze   64: int
1.9       kristaps   65: mdoc_hash_find(const char *p)
1.1       kristaps   66: {
1.9       kristaps   67:        int               major, i, j;
1.1       kristaps   68:
1.9       kristaps   69:        if (0 == p[0])
1.25    ! schwarze   70:                return(TOKEN_NONE);
1.18      kristaps   71:        if ( ! isalpha((unsigned char)p[0]) && '%' != p[0])
1.25    ! schwarze   72:                return(TOKEN_NONE);
1.6       kristaps   73:
1.18      kristaps   74:        if (isalpha((unsigned char)p[1]))
                     75:                major = 12 * (tolower((unsigned char)p[1]) - 97);
1.9       kristaps   76:        else if ('1' == p[1])
                     77:                major = 12 * 26;
1.20      schwarze   78:        else
1.25    ! schwarze   79:                return(TOKEN_NONE);
1.1       kristaps   80:
1.9       kristaps   81:        if (p[2] && p[3])
1.25    ! schwarze   82:                return(TOKEN_NONE);
1.1       kristaps   83:
1.9       kristaps   84:        for (j = 0; j < 12; j++) {
                     85:                if (UCHAR_MAX == (i = table[major + j]))
                     86:                        break;
                     87:                if (0 == strcmp(p, mdoc_macronames[i]))
1.23      schwarze   88:                        return(i);
1.1       kristaps   89:        }
                     90:
1.25    ! schwarze   91:        return(TOKEN_NONE);
1.1       kristaps   92: }