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Annotation of mandoc/compat_stringlist.c, Revision 1.3

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