src/msgfile.c

   1 /*
   2  * Parse a simple file with messages, e.g used for USSD messages
   3  *
   4  * (C) 2010 by Holger Hans Peter Freyther
   5  * (C) 2010 by On-Waves
   6  * All Rights Reserved
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  *
  22  */
  23
  24 #include <osmocom/core/msgfile.h>
  25 #include <osmocom/core/talloc.h>
  26
  27 #include <sys/stat.h>
  28 #include <fcntl.h>
  29 #include <unistd.h>
  30 #include <string.h>
  31
  32 static struct osmo_config_entry *
  33 alloc_entry(struct osmo_config_list *entries,
  34             const char *mcc, const char *mnc,
  35             const char *option, const char *text)
  36 {
  37         struct osmo_config_entry *entry =
  38                 talloc_zero(entries, struct osmo_config_entry);
  39         if (!entry)
  40                 return NULL;
  41
  42         entry->mcc = talloc_strdup(entry, mcc);
  43         entry->mnc = talloc_strdup(entry, mnc);
  44         entry->option = talloc_strdup(entry, option);
  45         entry->text = talloc_strdup(entry, text);
  46
  47         llist_add_tail(&entry->list, &entries->entry);
  48         return entry;
  49 }
  50
  51 static struct osmo_config_list *alloc_entries(void *ctx)
  52 {
  53         struct osmo_config_list *entries;
  54
  55         entries = talloc_zero(ctx, struct osmo_config_list);
  56         if (!entries)
  57                 return NULL;
  58
  59         INIT_LLIST_HEAD(&entries->entry);
  60         return entries;
  61 }
  62
  63 /*
  64  * split a line like 'foo:Text'.
  65  */
  66 static void handle_line(struct osmo_config_list *entries, char *line)
  67 {
  68         int i;
  69         const int len = strlen(line);
  70
  71         char *items[3];
  72         int last_item = 0;
  73
  74         /* Skip comments from the file */
  75         if (line[0] == '#')
  76                 return;
  77
  78         for (i = 0; i < len; ++i) {
  79                 if (line[i] == '\n' || line[i] == '\r')
  80                         line[i] = '\0';
  81                 else if (line[i] == ':' && last_item < 3) {
  82                         line[i] = '\0';
  83
  84                         items[last_item++] = &line[i + 1];
  85                 }
  86         }
  87
  88         if (last_item == 3) {
  89                 alloc_entry(entries, &line[0] , items[0], items[1], items[2]);
  90                 return;
  91         }
  92
  93         /* nothing found */
  94 }
  95
  96 struct osmo_config_list *osmo_config_list_parse(void *ctx, const char *filename)
  97 {
  98         struct osmo_config_list *entries;
  99         size_t n;
 100         char *line;
 101         FILE *file;
 102
 103         file = fopen(filename, "r");
 104         if (!file)
 105                 return NULL;
 106
 107         entries = alloc_entries(ctx);
 108         if (!entries) {
 109                 fclose(file);
 110                 return NULL;
 111         }
 112
 113         n = 2342;
 114         line = NULL;
 115         while (getline(&line, &n, file) != -1) {
 116                 handle_line(entries, line);
 117                 free(line);
 118                 line = NULL;
 119         }
 120
 121         fclose(file);
 122         return entries;
 123 }