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Annotation of mandoc/compat_stringlist.c, Revision 1.8

1.8     ! schwarze    1: /*     $Id: compat_stringlist.c,v 1.7 2020/06/15 01:37:15 schwarze Exp $ */
        !             2: /*     $NetBSD: stringlist.c,v 1.14 2015/05/21 01:29:13 christos Exp $ */
        !             3:
        !             4: /*-
        !             5:  * Copyright (c) 1994, 1999 The NetBSD Foundation, Inc.
1.1       schwarze    6:  * All rights reserved.
                      7:  *
1.8     ! schwarze    8:  * This code is derived from software contributed to The NetBSD Foundation
        !             9:  * by Christos Zoulas.
        !            10:  *
1.1       schwarze   11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  *
1.8     ! schwarze   20:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
        !            21:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
        !            22:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
        !            23:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
        !            24:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
        !            25:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
        !            26:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
        !            27:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
        !            28:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
        !            29:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
        !            30:  * POSSIBILITY OF SUCH DAMAGE.
1.1       schwarze   31:  */
1.7       schwarze   32: #include "config.h"
1.1       schwarze   33:
                     34: #include <stdlib.h>
1.2       schwarze   35: #include <string.h>
                     36: #include "compat_stringlist.h"
1.1       schwarze   37:
                     38: #define _SL_CHUNKSIZE  20
                     39:
                     40: /*
                     41:  * sl_init(): Initialize a string list
                     42:  */
                     43: StringList *
                     44: sl_init(void)
                     45: {
                     46:        StringList *sl;
                     47:
                     48:        sl = malloc(sizeof(StringList));
                     49:        if (sl == NULL)
1.8     ! schwarze   50:                return NULL;
1.1       schwarze   51:
                     52:        sl->sl_cur = 0;
                     53:        sl->sl_max = _SL_CHUNKSIZE;
1.3       schwarze   54:        sl->sl_str = reallocarray(NULL, sl->sl_max, sizeof(char *));
1.8     ! schwarze   55:        if (sl->sl_str == NULL) {
        !            56:                free(sl);
        !            57:                sl = NULL;
        !            58:        }
1.1       schwarze   59:        return sl;
                     60: }
                     61:
                     62:
                     63: /*
                     64:  * sl_add(): Add an item to the string list
                     65:  */
                     66: int
                     67: sl_add(StringList *sl, char *name)
                     68: {
                     69:        if (sl->sl_cur == sl->sl_max - 1) {
1.8     ! schwarze   70:                char    **new;
        !            71:
        !            72:                new = reallocarray(sl->sl_str, (sl->sl_max + _SL_CHUNKSIZE),
        !            73:                    sizeof(char *));
        !            74:                if (new == NULL)
        !            75:                        return -1;
1.1       schwarze   76:                sl->sl_max += _SL_CHUNKSIZE;
1.8     ! schwarze   77:                sl->sl_str = new;
1.1       schwarze   78:        }
                     79:        sl->sl_str[sl->sl_cur++] = name;
1.8     ! schwarze   80:        return 0;
1.1       schwarze   81: }
                     82:
                     83:
                     84: /*
                     85:  * sl_free(): Free a stringlist
                     86:  */
                     87: void
                     88: sl_free(StringList *sl, int all)
                     89: {
                     90:        size_t i;
                     91:
                     92:        if (sl == NULL)
                     93:                return;
                     94:        if (sl->sl_str) {
                     95:                if (all)
                     96:                        for (i = 0; i < sl->sl_cur; i++)
                     97:                                free(sl->sl_str[i]);
                     98:                free(sl->sl_str);
                     99:        }
                    100:        free(sl);
                    101: }
                    102:
                    103:
                    104: /*
                    105:  * sl_find(): Find a name in the string list
                    106:  */
                    107: char *
                    108: sl_find(StringList *sl, const char *name)
                    109: {
                    110:        size_t i;
                    111:
                    112:        for (i = 0; i < sl->sl_cur; i++)
                    113:                if (strcmp(sl->sl_str[i], name) == 0)
                    114:                        return sl->sl_str[i];
                    115:
                    116:        return NULL;
                    117: }
1.8     ! schwarze  118:
        !           119: int
        !           120: sl_delete(StringList *sl, const char *name, int all)
        !           121: {
        !           122:        size_t i, j;
        !           123:
        !           124:        for (i = 0; i < sl->sl_cur; i++)
        !           125:                if (strcmp(sl->sl_str[i], name) == 0) {
        !           126:                        if (all)
        !           127:                                free(sl->sl_str[i]);
        !           128:                        for (j = i + 1; j < sl->sl_cur; j++)
        !           129:                                sl->sl_str[j - 1] = sl->sl_str[j];
        !           130:                        sl->sl_str[--sl->sl_cur] = NULL;
        !           131:                        return 0;
        !           132:                }
        !           133:        return -1;
        !           134: }
        !           135: