src/input/info.h

   1 /*****************************************************************************
   2  * info.h
   3  *****************************************************************************
   4  * Copyright (C) 2010 Laurent Aimar
   5  *
   6  * Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU Lesser General Public License as published by
  10  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 #ifndef LIBVLC_INPUT_INFO_H
  24 #define LIBVLC_INPUT_INFO_H 1
  25
  26 #include "vlc_input_item.h"
  27
  28 static inline info_t *info_New(const char *name)
  29 {
  30     info_t *info = malloc(sizeof(*info));
  31     if (!info)
  32         return NULL;
  33
  34     info->psz_name = strdup(name);
  35     info->psz_value = NULL;
  36     return info;
  37 }
  38
  39 static inline void info_Delete(info_t *i)
  40 {
  41     free(i->psz_name);
  42     free(i->psz_value);
  43     free(i);
  44 }
  45
  46 static inline info_category_t *info_category_New(const char *name)
  47 {
  48     info_category_t *cat = malloc(sizeof(*cat));
  49     if (!cat)
  50         return NULL;
  51     cat->psz_name = strdup(name);
  52     vlc_list_init(&cat->infos);
  53     return cat;
  54 }
  55
  56 static inline info_t *info_category_FindInfo(const info_category_t *cat,
  57                                              const char *name)
  58 {
  59     info_t *info;
  60
  61     info_foreach(info, &cat->infos)
  62         if (!strcmp(info->psz_name, name))
  63             return info;
  64     return NULL;
  65 }
  66
  67 static inline void info_category_ReplaceInfo(info_category_t *cat,
  68                                              info_t *info)
  69 {
  70     info_t *old = info_category_FindInfo(cat, info->psz_name);
  71     if (old) {
  72         vlc_list_remove(&old->node);
  73         info_Delete(old);
  74     }
  75     vlc_list_append(&info->node, &cat->infos);
  76 }
  77
  78 static inline info_t *info_category_VaAddInfo(info_category_t *cat,
  79                                               const char *name,
  80                                               const char *format, va_list args)
  81 {
  82     info_t *info = info_category_FindInfo(cat, name);
  83     if (!info) {
  84         info = info_New(name);
  85         if (!info)
  86             return NULL;
  87         vlc_list_append(&info->node, &cat->infos);
  88     } else
  89         free(info->psz_value);
  90     if (vasprintf(&info->psz_value, format, args) == -1)
  91         info->psz_value = NULL;
  92     return info;
  93 }
  94
  95 static inline info_t *info_category_AddInfo(info_category_t *cat,
  96                                             const char *name,
  97                                             const char *format, ...)
  98 {
  99     va_list args;
 100
 101     va_start(args, format);
 102     info_t *info = info_category_VaAddInfo(cat, name, format, args);
 103     va_end(args);
 104
 105     return info;
 106 }
 107
 108 static inline int info_category_DeleteInfo(info_category_t *cat, const char *name)
 109 {
 110     info_t *info = info_category_FindInfo(cat, name);
 111     if (info != NULL) {
 112         vlc_list_remove(&info->node);
 113         info_Delete(info);
 114         return VLC_SUCCESS;
 115     }
 116     return VLC_EGENERIC;
 117 }
 118
 119 static inline void info_category_Delete(info_category_t *cat)
 120 {
 121     info_t *info;
 122
 123     while ((info = vlc_list_first_entry_or_null(&cat->infos, info_t, node))) {
 124         vlc_list_remove(&info->node);
 125         info_Delete(info);
 126     }
 127     free(cat->psz_name);
 128     free(cat);
 129 }
 130
 131 #endif