Return to mdoc_hash.c CVS log

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

Annotation of src/usr.bin/mandoc/mdoc_hash.c, Revision 1.18

1.18    ! schwarze    1: /*     $OpenBSD: mdoc_hash.c,v 1.17 2015/04/02 21:03:18 schwarze Exp $ */
1.1       kristaps    2: /*
1.11      schwarze    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
1.2       schwarze    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:  *
1.2       schwarze    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:  */
1.5       schwarze   17: #include <sys/types.h>
                     18:
1.1       kristaps   19: #include <assert.h>
                     20: #include <ctype.h>
1.6       schwarze   21: #include <limits.h>
1.1       kristaps   22: #include <stdlib.h>
                     23: #include <stdio.h>
                     24: #include <string.h>
                     25:
1.17      schwarze   26: #include "roff.h"
1.12      schwarze   27: #include "mdoc.h"
1.1       kristaps   28: #include "libmdoc.h"
                     29:
1.13      schwarze   30: static unsigned char    table[27 * 12];
1.1       kristaps   31:
1.15      schwarze   32:
1.6       schwarze   33: /*
                     34:  * XXX - this hash has global scope, so if intended for use as a library
                     35:  * with multiple callers, it will need re-invocation protection.
                     36:  */
1.1       kristaps   37: void
1.6       schwarze   38: mdoc_hash_init(void)
1.1       kristaps   39: {
1.6       schwarze   40:        int              i, j, major;
                     41:        const char      *p;
1.1       kristaps   42:
1.6       schwarze   43:        memset(table, UCHAR_MAX, sizeof(table));
1.1       kristaps   44:
1.9       schwarze   45:        for (i = 0; i < (int)MDOC_MAX; i++) {
1.6       schwarze   46:                p = mdoc_macronames[i];
1.1       kristaps   47:
1.13      schwarze   48:                if (isalpha((unsigned char)p[1]))
                     49:                        major = 12 * (tolower((unsigned char)p[1]) - 97);
1.6       schwarze   50:                else
1.13      schwarze   51:                        major = 12 * 26;
1.6       schwarze   52:
1.13      schwarze   53:                for (j = 0; j < 12; j++)
1.6       schwarze   54:                        if (UCHAR_MAX == table[major + j]) {
1.13      schwarze   55:                                table[major + j] = (unsigned char)i;
1.6       schwarze   56:                                break;
                     57:                        }
1.1       kristaps   58:
1.13      schwarze   59:                assert(j < 12);
1.1       kristaps   60:        }
                     61: }
                     62:
1.18    ! schwarze   63: int
1.6       schwarze   64: mdoc_hash_find(const char *p)
1.1       kristaps   65: {
1.6       schwarze   66:        int               major, i, j;
1.1       kristaps   67:
1.6       schwarze   68:        if (0 == p[0])
1.1       kristaps   69:                return(MDOC_MAX);
1.13      schwarze   70:        if ( ! isalpha((unsigned char)p[0]) && '%' != p[0])
1.4       schwarze   71:                return(MDOC_MAX);
                     72:
1.13      schwarze   73:        if (isalpha((unsigned char)p[1]))
                     74:                major = 12 * (tolower((unsigned char)p[1]) - 97);
1.6       schwarze   75:        else if ('1' == p[1])
1.13      schwarze   76:                major = 12 * 26;
1.15      schwarze   77:        else
1.1       kristaps   78:                return(MDOC_MAX);
                     79:
1.6       schwarze   80:        if (p[2] && p[3])
1.1       kristaps   81:                return(MDOC_MAX);
                     82:
1.13      schwarze   83:        for (j = 0; j < 12; j++) {
1.6       schwarze   84:                if (UCHAR_MAX == (i = table[major + j]))
                     85:                        break;
                     86:                if (0 == strcmp(p, mdoc_macronames[i]))
1.18    ! schwarze   87:                        return(i);
1.1       kristaps   88:        }
                     89:
                     90:        return(MDOC_MAX);
                     91: }