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Annotation of mandoc/compat_stringlist.c, Revision 1.7

1.7     ! schwarze    1: /* $Id: compat_stringlist.c,v 1.6 2015/11/07 14:22:29 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:  *
                     15:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
                     16:  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     18:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
                     19:  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     20:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     21:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     22:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     23:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     24:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     25:  * SUCH DAMAGE.
                     26:  */
1.7     ! schwarze   27: #include "config.h"
1.1       schwarze   28:
1.6       schwarze   29: #if HAVE_ERR
1.1       schwarze   30: #include <err.h>
1.6       schwarze   31: #endif
1.1       schwarze   32: #include <stdlib.h>
1.2       schwarze   33: #include <string.h>
                     34: #include "compat_stringlist.h"
1.1       schwarze   35:
                     36: #define _SL_CHUNKSIZE  20
                     37:
                     38: /*
                     39:  * sl_init(): Initialize a string list
                     40:  */
                     41: StringList *
                     42: sl_init(void)
                     43: {
                     44:        StringList *sl;
                     45:
                     46:        sl = malloc(sizeof(StringList));
                     47:        if (sl == NULL)
1.2       schwarze   48:                err(1, "stringlist");
1.1       schwarze   49:
                     50:        sl->sl_cur = 0;
                     51:        sl->sl_max = _SL_CHUNKSIZE;
1.3       schwarze   52:        sl->sl_str = reallocarray(NULL, sl->sl_max, sizeof(char *));
1.1       schwarze   53:        if (sl->sl_str == NULL)
1.2       schwarze   54:                err(1, "stringlist");
1.1       schwarze   55:        return sl;
                     56: }
                     57:
                     58:
                     59: /*
                     60:  * sl_add(): Add an item to the string list
                     61:  */
                     62: int
                     63: sl_add(StringList *sl, char *name)
                     64: {
                     65:        if (sl->sl_cur == sl->sl_max - 1) {
                     66:                sl->sl_max += _SL_CHUNKSIZE;
1.3       schwarze   67:                sl->sl_str = reallocarray(sl->sl_str,
                     68:                    sl->sl_max, sizeof(char *));
1.1       schwarze   69:                if (sl->sl_str == NULL)
                     70:                        return (-1);
                     71:        }
                     72:        sl->sl_str[sl->sl_cur++] = name;
                     73:        return (0);
                     74: }
                     75:
                     76:
                     77: /*
                     78:  * sl_free(): Free a stringlist
                     79:  */
                     80: void
                     81: sl_free(StringList *sl, int all)
                     82: {
                     83:        size_t i;
                     84:
                     85:        if (sl == NULL)
                     86:                return;
                     87:        if (sl->sl_str) {
                     88:                if (all)
                     89:                        for (i = 0; i < sl->sl_cur; i++)
                     90:                                free(sl->sl_str[i]);
                     91:                free(sl->sl_str);
                     92:        }
                     93:        free(sl);
                     94: }
                     95:
                     96:
                     97: /*
                     98:  * sl_find(): Find a name in the string list
                     99:  */
                    100: char *
                    101: sl_find(StringList *sl, const char *name)
                    102: {
                    103:        size_t i;
                    104:
                    105:        for (i = 0; i < sl->sl_cur; i++)
                    106:                if (strcmp(sl->sl_str[i], name) == 0)
                    107:                        return sl->sl_str[i];
                    108:
                    109:        return NULL;
                    110: }