lib/util/util_strlist_v3.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Andrew Tridgell 2005
   5    Copyright (C) Jelmer Vernooij 2005
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "system/locale.h"
  23 #include "lib/util/tsort.h"
  24
  25 #undef strcasecmp
  26
  27 /**
  28  * @file
  29  * @brief String list manipulation v3
  30  */
  31
  32 /**
  33  * Needed for making an "unconst" list "const"
  34  */
  35 _PUBLIC_ const char **const_str_list(char **list)
  36 {
  37         return discard_const_p(const char *, list);
  38 }
  39
  40 /**
  41  * str_list_make, v3 version. The v4 version does not
  42  * look at quoted strings with embedded blanks, so
  43  * do NOT merge this function please!
  44  */
  45 #define S_LIST_ABS 16 /* List Allocation Block Size */
  46
  47 char **str_list_make_v3(TALLOC_CTX *mem_ctx, const char *string,
  48         const char *sep)
  49 {
  50         char **list;
  51         const char *str;
  52         char *s, *tok;
  53         int num, lsize;
  54
  55         if (!string || !*string)
  56                 return NULL;
  57
  58         list = talloc_array(mem_ctx, char *, S_LIST_ABS+1);
  59         if (list == NULL) {
  60                 return NULL;
  61         }
  62         lsize = S_LIST_ABS;
  63
  64         s = talloc_strdup(list, string);
  65         if (s == NULL) {
  66                 DEBUG(0,("str_list_make: Unable to allocate memory"));
  67                 TALLOC_FREE(list);
  68                 return NULL;
  69         }
  70
  71         /*
  72          * DON'T REPLACE THIS BY "LIST_SEP". The common version of
  73          * LIST_SEP does not contain the ;, which used to be accepted
  74          * by Samba 4.0 before param merges. It would be the far
  75          * better solution to split the _v3 version again to source3/
  76          * where it belongs, see the _v3 in its name.
  77          *
  78          * Unfortunately it is referenced in /lib/param/loadparm.c,
  79          * which depends on the version that the AD-DC mandates,
  80          * namely without the ; as part of the list separator. I am
  81          * missing the waf fu to properly work around the wrong
  82          * include paths here for this defect.
  83          */
  84         if (sep == NULL) {
  85                 sep = " \t,;\n\r";
  86         }
  87
  88         num = 0;
  89         str = s;
  90
  91         while (next_token_talloc(list, &str, &tok, sep)) {
  92
  93                 if (num == lsize) {
  94                         char **tmp;
  95
  96                         lsize += S_LIST_ABS;
  97
  98                         tmp = talloc_realloc(mem_ctx, list, char *,
  99                                                    lsize + 1);
 100                         if (tmp == NULL) {
 101                                 DEBUG(0,("str_list_make: "
 102                                         "Unable to allocate memory"));
 103                                 TALLOC_FREE(list);
 104                                 return NULL;
 105                         }
 106
 107                         list = tmp;
 108
 109                         memset (&list[num], 0,
 110                                 ((sizeof(char*)) * (S_LIST_ABS +1)));
 111                 }
 112
 113                 list[num] = tok;
 114                 num += 1;
 115         }
 116
 117         list[num] = NULL;
 118
 119         TALLOC_FREE(s);
 120         return list;
 121 }
 122
 123 const char **str_list_make_v3_const(TALLOC_CTX *mem_ctx,
 124                                     const char *string,
 125                                     const char *sep)
 126 {
 127         return const_str_list(str_list_make_v3(mem_ctx, string, sep));
 128 }