src/capabilities.c

   1 /* libmpdclient
   2    (c) 2003-2017 The Music Player Daemon Project
   3    This project's homepage is: http://www.musicpd.org
   4
   5    Redistribution and use in source and binary forms, with or without
   6    modification, are permitted provided that the following conditions
   7    are met:
   8
   9    - Redistributions of source code must retain the above copyright
  10    notice, this list of conditions and the following disclaimer.
  11
  12    - Redistributions in binary form must reproduce the above copyright
  13    notice, this list of conditions and the following disclaimer in the
  14    documentation and/or other materials provided with the distribution.
  15
  16    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19    A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
  20    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  21    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  22    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  23    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  24    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  25    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  26    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27 */
  28
  29 #include <mpd/capabilities.h>
  30 #include <mpd/send.h>
  31 #include <mpd/recv.h>
  32 #include <mpd/response.h>
  33 #include "internal.h"
  34
  35 #include <assert.h>
  36 #include <stddef.h>
  37 #include <string.h>
  38
  39 bool
  40 mpd_send_allowed_commands(struct mpd_connection *connection)
  41 {
  42         return mpd_send_command(connection, "commands", NULL);
  43 }
  44
  45 bool
  46 mpd_send_disallowed_commands(struct mpd_connection *connection)
  47 {
  48         return mpd_send_command(connection, "notcommands", NULL);
  49 }
  50
  51 bool
  52 mpd_send_list_url_schemes(struct mpd_connection *connection)
  53 {
  54         return mpd_send_command(connection, "urlhandlers", NULL);
  55 }
  56
  57 bool
  58 mpd_send_list_tag_types(struct mpd_connection *connection)
  59 {
  60         return mpd_send_command(connection, "tagtypes", NULL);
  61 }
  62
  63 static bool
  64 mpd_send_tag_types_v(struct mpd_connection *connection,
  65                      const char *sub_command,
  66                      const enum mpd_tag_type *types, unsigned n)
  67 {
  68         assert(connection != NULL);
  69         assert(types != NULL);
  70         assert(n > 0);
  71
  72         if (mpd_error_is_defined(&connection->error))
  73                 return false;
  74
  75         char buffer[1024] = "tagtypes ";
  76         strcat(buffer, sub_command);
  77         size_t length = strlen(buffer);
  78
  79         for (unsigned i = 0; i < n; ++i) {
  80                 const char *t = mpd_tag_name(types[i]);
  81                 assert(t != NULL);
  82                 size_t t_length = strlen(t);
  83
  84                 if (length + 1 + t_length + 1 > sizeof(buffer)) {
  85                         mpd_error_code(&connection->error, MPD_ERROR_ARGUMENT);
  86                         mpd_error_message(&connection->error,
  87                                           "Tag list is too long");
  88                         return false;
  89                 }
  90
  91                 buffer[length++] = ' ';
  92                 memcpy(buffer + length, t, t_length);
  93                 length += t_length;
  94         }
  95
  96         buffer[length] = 0;
  97
  98         return mpd_send_command(connection, buffer, NULL);
  99 }
 100
 101 bool
 102 mpd_send_disable_tag_types(struct mpd_connection *connection,
 103                            const enum mpd_tag_type *types, unsigned n)
 104 {
 105         return mpd_send_tag_types_v(connection, "disable", types, n);
 106 }
 107
 108 bool
 109 mpd_run_disable_tag_types(struct mpd_connection *connection,
 110                           const enum mpd_tag_type *types, unsigned n)
 111 {
 112         return mpd_send_disable_tag_types(connection, types, n) &&
 113                 mpd_response_finish(connection);
 114 }
 115
 116 bool
 117 mpd_send_enable_tag_types(struct mpd_connection *connection,
 118                           const enum mpd_tag_type *types, unsigned n)
 119 {
 120         return mpd_send_tag_types_v(connection, "enable", types, n);
 121 }
 122
 123 bool
 124 mpd_run_enable_tag_types(struct mpd_connection *connection,
 125                          const enum mpd_tag_type *types, unsigned n)
 126 {
 127         return mpd_send_enable_tag_types(connection, types, n) &&
 128                 mpd_response_finish(connection);
 129 }
 130
 131 bool
 132 mpd_send_clear_tag_types(struct mpd_connection *connection)
 133 {
 134         return mpd_send_command(connection, "tagtypes", "clear", NULL);
 135 }
 136
 137 bool
 138 mpd_run_clear_tag_types(struct mpd_connection *connection)
 139 {
 140         return mpd_send_clear_tag_types(connection) &&
 141                 mpd_response_finish(connection);
 142 }