src/input/info.h

   1 /*****************************************************************************
   2  * info.h
   3  *****************************************************************************
   4  * Copyright (C) 2010 Laurent Aimar
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifndef LIBVLC_INPUT_INFO_H
  25 #define LIBVLC_INPUT_INFO_H 1
  26
  27 #include "vlc_input_item.h"
  28
  29 static inline info_t *info_New(const char *name)
  30 {
  31     info_t *info = malloc(sizeof(*info));
  32     if (!info)
  33         return NULL;
  34
  35     info->psz_name = strdup(name);
  36     info->psz_value = NULL;
  37     return info;
  38 }
  39
  40 static inline void info_Delete(info_t *i)
  41 {
  42     free(i->psz_name);
  43     free(i->psz_value);
  44     free(i);
  45 }
  46
  47 static inline info_category_t *info_category_New(const char *name)
  48 {
  49     info_category_t *cat = malloc(sizeof(*cat));
  50     if (!cat)
  51         return NULL;
  52     cat->psz_name = strdup(name);
  53     vlc_list_init(&cat->infos);
  54     return cat;
  55 }
  56
  57 static inline info_t *info_category_FindInfo(const info_category_t *cat,
  58                                              const char *name)
  59 {
  60     info_t *info;
  61
  62     info_foreach(info, &cat->infos)
  63         if (!strcmp(info->psz_name, name))
  64             return info;
  65     return NULL;
  66 }
  67
  68 static inline void info_category_ReplaceInfo(info_category_t *cat,
  69                                              info_t *info)
  70 {
  71     info_t *old = info_category_FindInfo(cat, info->psz_name);
  72     if (old) {
  73         vlc_list_remove(&old->node);
  74         info_Delete(old);
  75     }
  76     vlc_list_append(&info->node, &cat->infos);
  77 }
  78
  79 static inline info_t *info_category_VaAddInfo(info_category_t *cat,
  80                                               const char *name,
  81                                               const char *format, va_list args)
  82 {
  83     info_t *info = info_category_FindInfo(cat, name);
  84     if (!info) {
  85         info = info_New(name);
  86         if (!info)
  87             return NULL;
  88         vlc_list_append(&info->node, &cat->infos);
  89     } else
  90         free(info->psz_value);
  91     if (vasprintf(&info->psz_value, format, args) == -1)
  92         info->psz_value = NULL;
  93     return info;
  94 }
  95
  96 static inline info_t *info_category_AddInfo(info_category_t *cat,
  97                                             const char *name,
  98                                             const char *format, ...)
  99 {
 100     va_list args;
 101
 102     va_start(args, format);
 103     info_t *info = info_category_VaAddInfo(cat, name, format, args);
 104     va_end(args);
 105
 106     return info;
 107 }
 108
 109 static inline int info_category_DeleteInfo(info_category_t *cat, const char *name)
 110 {
 111     info_t *info = info_category_FindInfo(cat, name);
 112     if (info != NULL) {
 113         vlc_list_remove(&info->node);
 114         info_Delete(info);
 115         return VLC_SUCCESS;
 116     }
 117     return VLC_EGENERIC;
 118 }
 119
 120 static inline void info_category_Delete(info_category_t *cat)
 121 {
 122     info_t *info;
 123
 124     while ((info = vlc_list_first_entry_or_null(&cat->infos, info_t, node))) {
 125         vlc_list_remove(&info->node);
 126         info_Delete(info);
 127     }
 128     free(cat->psz_name);
 129     free(cat);
 130 }
 131
 132 #endif