/**
* read_file:
* @path : path to file.
* @buf : buffer to allocate and read the contents of the
* file into. Needs to be freed manually.
* @length : Number of items read, -1 on error.
*
* Read the contents of a file into @buf. Will call read_compressed_file
* if path contains a compressed file, otherwise will call read_generic_file.
*
* Returns: 1 if file read, 0 on error.
*/
int read_file(const char *path, void **buf, ssize_t *length)
{
#ifdef HAVE_COMPRESSION
if (path_contains_compressed_file(path))
{
if (read_compressed_file(path, buf, NULL, length))
return 1;
}
#endif
return read_generic_file(path, buf, length);
}
/* Generic file loader. */
long read_file(const char *path, void **buf)
{
/* Here we check, whether the file, we are about to read is
* inside an archive, or not.
*
* We determine, whether a file is inside a compressed archive,
* by checking for the # inside the URL.
*
* For example: fullpath: /home/user/game.7z/mygame.rom
* carchive_path: /home/user/game.7z
* */
#ifdef HAVE_COMPRESSION
if (path_contains_compressed_file(path))
return read_compressed_file(path,buf,0);
#endif
return read_generic_file(path,buf);
}
static bool load_content(const struct retro_subsystem_info *special,
const struct string_list *content)
{
unsigned i;
bool ret = true;
struct string_list* additional_path_allocs = string_list_new();
struct retro_game_info *info = (struct retro_game_info*)
calloc(content->size, sizeof(*info));
if (!info)
return false;
for (i = 0; i < content->size; i++)
{
const char *path = content->elems[i].data;
int attr = content->elems[i].attr.i;
bool need_fullpath = attr & 2;
bool require_content = attr & 4;
if (require_content && !*path)
{
RARCH_LOG("libretro core requires content, but nothing was provided.\n");
ret = false;
goto end;
}
info[i].path = *path ? path : NULL;
if (!need_fullpath && *path)
{
/* Load the content into memory. */
RARCH_LOG("Loading content file: %s.\n", path);
/* First content file is significant, attempt to do patching,
* CRC checking, etc. */
long size = i == 0 ?
read_content_file(path, (void**)&info[i].data) :
read_file(path, (void**)&info[i].data);
if (size < 0)
{
RARCH_ERR("Could not read content file \"%s\".\n", path);
ret = false;
goto end;
}
info[i].size = size;
}
else
{
RARCH_LOG("Content loading skipped. Implementation will"
" load it on its own.\n");
if (need_fullpath && path_contains_compressed_file(path))
{
RARCH_LOG("Compressed file in case of need_fullpath."
"Now extracting to temporary directory.\n");
if ((!strcmp(g_settings.extraction_directory,"")) ||
!path_is_directory(g_settings.extraction_directory))
{
RARCH_ERR("Tried extracting to extraction directory, but "
"extraction directory was not set or found. Exiting.\n");
rarch_assert(false);
}
char new_path[PATH_MAX];
union string_list_elem_attr attr;
attr.i = 0;
fill_pathname_join(new_path,g_settings.extraction_directory,
path_basename(path),sizeof(new_path));
read_compressed_file(path,NULL,new_path);
string_list_append(additional_path_allocs,new_path,attr);
info[i].path =
additional_path_allocs->elems
[additional_path_allocs->size -1 ].data;
}
}
}
if (special)
ret = pretro_load_game_special(special->id, info, content->size);
else
ret = pretro_load_game(*content->elems[0].data ? info : NULL);
if (!ret)
RARCH_ERR("Failed to load game.\n");
end:
for (i = 0; i < content->size; i++)
free((void*)info[i].data);
string_list_free(additional_path_allocs);
free(info);
return ret;
}
static bool load_content_need_fullpath(
struct retro_game_info *info, unsigned i,
struct string_list* additional_path_allocs,
bool need_fullpath, const char *path)
{
#ifdef HAVE_COMPRESSION
ssize_t len;
union string_list_elem_attr attributes;
char new_path[PATH_MAX_LENGTH] = {0};
char new_basedir[PATH_MAX_LENGTH] = {0};
bool ret = false;
settings_t *settings = config_get_ptr();
global_t *global = global_get_ptr();
rarch_system_info_t *sys_info= rarch_system_info_get_ptr();
if (sys_info && sys_info->info.block_extract)
return true;
if (!need_fullpath)
return true;
if (!path_contains_compressed_file(path))
return true;
RARCH_LOG("Compressed file in case of need_fullpath."
"Now extracting to temporary directory.\n");
strlcpy(new_basedir, settings->extraction_directory,
sizeof(new_basedir));
if ((!strcmp(new_basedir, "")) ||
!path_is_directory(new_basedir))
{
RARCH_WARN("Tried extracting to extraction directory, but "
"extraction directory was not set or found. "
"Setting extraction directory to directory "
"derived by basename...\n");
fill_pathname_basedir(new_basedir, path,
sizeof(new_basedir));
}
attributes.i = 0;
fill_pathname_join(new_path, new_basedir,
path_basename(path), sizeof(new_path));
ret = read_compressed_file(path,NULL,new_path, &len);
if (!ret || len < 0)
{
RARCH_ERR("%s \"%s\".\n",
msg_hash_to_str(MSG_COULD_NOT_READ_CONTENT_FILE),
path);
return false;
}
string_list_append(additional_path_allocs,new_path, attributes);
info[i].path =
additional_path_allocs->elems
[additional_path_allocs->size -1 ].data;
/* global->temporary_content is initialized in init_content_file
* The following part takes care of cleanup of the unzipped files
* after exit.
*/
rarch_assert(global->temporary_content != NULL);
string_list_append(global->temporary_content,
new_path, attributes);
#endif
return true;
}