recv_common.c

   1 /*
   2  * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     This program is distributed in the hope that it will be useful,
  10  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *     GNU General Public License for more details.
  13  *
  14  *     You should have received a copy of the GNU General Public License
  15  *     along with this program; if not, write to the Free Software
  16  *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  17  */
  18
  19 /** \file recv_common.c common functions of para_recv and para_audiod */
  20
  21 #include "para.h"
  22
  23 #include "list.h"
  24 #include "sched.h"
  25 #include "recv.h"
  26 #include "string.h"
  27
  28 DEFINE_RECEIVER_ARRAY;
  29 static void *parse_receiver_args(int receiver_num, char *options)
  30 {
  31         struct receiver *r = &receivers[receiver_num];
  32         char **argv;
  33         int argc, i;
  34         void *conf;
  35
  36
  37 //      PARA_DEBUG_LOG("%s, options: %s\n", r->name,
  38 //              options? options : "(none)");
  39         if (options) {
  40                 PARA_DEBUG_LOG("options: %s\n", options);
  41                 argc = split_args(options, &argv, " \t");
  42                 for (i = argc - 1; i >= 0; i--)
  43                         argv[i + 1] = argv[i];
  44                 argv[0] = para_strdup(r->name);
  45                 argc += 1;
  46                 PARA_DEBUG_LOG("argc = %d, argv[0]: %s\n", argc, argv[0]);
  47         } else {
  48                 argc = 1;
  49                 argv = para_malloc(2 * sizeof(char*));
  50                 argv[0] = NULL;
  51                 argv[1] = NULL;
  52         }
  53         conf = r->parse_config(argc, argv);
  54         free(argv[0]);
  55         free(argv);
  56         return conf;
  57 }
  58
  59 /**
  60  * check if given string is a valid command line for any receiver
  61  *
  62  * \param \ra string of the form receiver_name:options
  63  * \param receiver_num contains the number of the receiver upon success
  64  *
  65  * This function checks whether \a ra starts with the name of a supported
  66  * paraslash receiver, optinally followed by a colon and any options for that
  67  * receiver. If a valid receiver name was found and further are present, the
  68  * remaining part of \a ra is passed to that receiver's config parser.
  69  *
  70  * \return On success, a pointer to the gengetopt args info struct is returned
  71  * and \a receiver_num contains the number of the receiver. Otherwise this function
  72  * returns \p NULL.
  73  */
  74 void *check_receiver_arg(char *ra, int *receiver_num)
  75 {
  76         int j;
  77
  78         PARA_DEBUG_LOG("checking %s\n", ra);
  79         for (j = 0; receivers[j].name; j++) {
  80                 const char *name = receivers[j].name;
  81                 size_t len = strlen(name);
  82                 char c;
  83                 if (strlen(ra) < len)
  84                         continue;
  85                 if (strncmp(name, ra, len))
  86                         continue;
  87                 c = ra[len];
  88                 if (c && c != ' ')
  89                         continue;
  90                 if (c && !receivers[j].parse_config)
  91                         return NULL;
  92                 *receiver_num = j;
  93                 return parse_receiver_args(j, c? ra + len + 1: NULL);
  94         }
  95         PARA_ERROR_LOG("%s", "receiver not found\n");
  96         return NULL;
  97 }