scanner: allow matching archives by member

This allows more flexible detection of content packaged as multiple
compressed files (e.g. MAME).

core_info.c

@@ -389,6 +389,10 @@ static core_info_list_t *core_info_list_new(const char *path)
                &tmp_bool))
             core_info[i].supports_no_game = tmp_bool;
 
+         if (config_get_bool(conf, "database_match_archive_member",
+               &tmp_bool))
+            core_info[i].database_match_archive_member = tmp_bool;
+
          core_info[i].config_data = conf;
       }
       else
@@ -823,6 +827,46 @@ size_t core_info_list_num_info_files(core_info_list_t *core_info_list)
    return num;
 }
 
+bool core_info_database_match_archive_member(const char *database_path)
+{
+   char *database           = NULL;
+   const char *new_path     = path_basename(database_path);
+
+   if (string_is_empty(new_path))
+      return false;
+
+   database                 = strdup(new_path);
+
+   if (string_is_empty(database))
+      goto error;
+
+   path_remove_extension(database);
+
+   if (core_info_curr_list)
+   {
+      size_t i;
+
+      for (i = 0; i < core_info_curr_list->count; i++)
+      {
+         const core_info_t *info = &core_info_curr_list->list[i];
+
+         if (!info->database_match_archive_member)
+             continue;
+
+         if (!string_list_find_elem(info->databases_list, database))
+             continue;
+
+         free(database);
+         return true;
+      }
+   }
+
+error:
+   if (database)
+      free(database);
+   return false;
+}
+
 bool core_info_database_supports_content_path(const char *database_path, const char *path)
 {
    char *database           = NULL;

core_info.h

@@ -38,6 +38,7 @@ typedef struct
 typedef struct
 {
    bool supports_no_game;
+   bool database_match_archive_member;
    size_t firmware_count;
    char *path;
    void *config_data;
@@ -120,6 +121,8 @@ bool core_info_load(core_info_ctx_find_t *info);
 
 bool core_info_database_supports_content_path(const char *database_path, const char *path);
 
+bool core_info_database_match_archive_member(const char *database_path);
+
 bool core_info_unsupported_content_path(const char *path);
 
 RETRO_END_DECLS

tasks/task_database.c

@@ -797,6 +797,7 @@ static int database_info_list_iterate_found_match(
       database_info_get_current_element_name(db);
    database_info_t *db_info_entry =
       &db_state->info->list[db_state->entry_index];
+   char *hash;
 
    db_crc[0]                      = '\0';
    db_playlist_path[0]            = '\0';
@@ -827,6 +828,11 @@ static int database_info_list_iterate_found_match(
             entry_path_str, archive_name,
             '#', PATH_MAX_LENGTH * sizeof(char));
 
+   if (core_info_database_match_archive_member(
+         db_state->list->elems[db_state->list_index].data) &&
+       (hash = strchr(entry_path_str, '#')))
+       *hash = '\0';
+
 #if 0
    RARCH_LOG("Found match in database !\n");
 
@@ -900,7 +906,10 @@ static int task_database_iterate_crc_lookup(
       query[0] = '\0';
 
       /* don't scan files that can't be in this database */
-      if (!core_info_database_supports_content_path(
+      if (!(path_contains_compressed_file(name) &&
+         core_info_database_match_archive_member(
+         db_state->list->elems[db_state->list_index].data)) &&
+          !core_info_database_supports_content_path(
          db_state->list->elems[db_state->list_index].data, name))
          return database_info_list_iterate_next(db_state);