src/directory.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    - Neither the name of the Music Player Daemon nor the names of its
  17    contributors may be used to endorse or promote products derived from
  18    this software without specific prior written permission.
  19
  20    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23    A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
  24    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  25    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  26    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  27    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  28    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  29    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  30    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31 */
  32
  33 #include <mpd/directory.h>
  34 #include <mpd/pair.h>
  35 #include "uri.h"
  36 #include "iso8601.h"
  37
  38 #include <assert.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <errno.h>
  42
  43 struct mpd_directory {
  44         /**
  45          * The full path of this directory.  It does not begin with a
  46          * slash.
  47          */
  48         char *path;
  49
  50         /**
  51          * The POSIX UTC time stamp of the last modification, or 0 if
  52          * that is unknown.
  53          */
  54         time_t last_modified;
  55 };
  56
  57 mpd_malloc
  58 static struct mpd_directory *
  59 mpd_directory_new(const char *path)
  60 {
  61         struct mpd_directory *directory;
  62
  63         assert(path != NULL);
  64         assert(mpd_verify_local_uri(path));
  65
  66         directory = malloc(sizeof(*directory));
  67         if (directory == NULL)
  68                 /* out of memory */
  69                 return NULL;
  70
  71         directory->path = strdup(path);
  72         if (directory->path == NULL) {
  73                 /* out of memory */
  74                 free(directory);
  75                 return NULL;
  76         }
  77
  78         directory->last_modified = 0;
  79
  80         return directory;
  81 }
  82
  83 void mpd_directory_free(struct mpd_directory *directory)
  84 {
  85         assert(directory != NULL);
  86         assert(directory->path != NULL);
  87
  88         free(directory->path);
  89         free(directory);
  90 }
  91
  92 struct mpd_directory *
  93 mpd_directory_dup(const struct mpd_directory *directory)
  94 {
  95         assert(directory != NULL);
  96         assert(directory->path != NULL);
  97
  98         struct mpd_directory *copy = mpd_directory_new(directory->path);
  99         copy->last_modified = directory->last_modified;
 100         return copy;
 101 }
 102
 103 const char *
 104 mpd_directory_get_path(const struct mpd_directory *directory)
 105 {
 106         assert(directory != NULL);
 107         assert(directory->path != NULL);
 108
 109         return directory->path;
 110 }
 111
 112 time_t
 113 mpd_directory_get_last_modified(const struct mpd_directory *directory)
 114 {
 115         assert(directory != NULL);
 116
 117         return directory->last_modified;
 118 }
 119
 120 struct mpd_directory *
 121 mpd_directory_begin(const struct mpd_pair *pair)
 122 {
 123         assert(pair != NULL);
 124         assert(pair->name != NULL);
 125         assert(pair->value != NULL);
 126
 127         if (strcmp(pair->name, "directory") != 0 ||
 128             !mpd_verify_local_uri(pair->value)) {
 129                 errno = EINVAL;
 130                 return NULL;
 131         }
 132
 133         return mpd_directory_new(pair->value);
 134 }
 135
 136 bool
 137 mpd_directory_feed(struct mpd_directory *directory,
 138                    const struct mpd_pair *pair)
 139 {
 140         assert(pair != NULL);
 141         assert(pair->name != NULL);
 142         assert(pair->value != NULL);
 143
 144         if (strcmp(pair->name, "directory") == 0)
 145                 return false;
 146
 147         if (strcmp(pair->name, "Last-Modified") == 0)
 148                 directory->last_modified =
 149                         iso8601_datetime_parse(pair->value);
 150
 151         return true;
 152 }