const struct file_archive_file_backend* file_archive_get_file_backend(const char *path)
{
char newpath[PATH_MAX_LENGTH];
const char *file_ext = NULL;
char *last = NULL;
newpath[0] = '\0';
strlcpy(newpath, path, sizeof(newpath));
last = (char*)path_get_archive_delim(newpath);
if (last)
*last = '\0';
file_ext = path_get_extension(newpath);
#ifdef HAVE_7ZIP
if (string_is_equal_noncase(file_ext, "7z"))
return &sevenzip_backend;
#endif
#ifdef HAVE_ZLIB
if ( string_is_equal_noncase(file_ext, "zip")
|| string_is_equal_noncase(file_ext, "apk")
)
return &zlib_backend;
#endif
return NULL;
}
/**
* file_archive_filename_split:
* @str : filename to turn into a string list
*
* Creates a new string list based on filename @path, delimited by a hash (#).
*
* Returns: new string list if successful, otherwise NULL.
*/
static struct string_list *file_archive_filename_split(const char *path)
{
union string_list_elem_attr attr;
struct string_list *list = string_list_new();
const char *delim = path_get_archive_delim(path);
memset(&attr, 0, sizeof(attr));
if (delim)
{
/* add archive path to list first */
if (!string_list_append_n(list, path, delim - path, attr))
goto error;
/* now add the path within the archive */
delim++;
if (*delim)
{
if (!string_list_append(list, delim, attr))
goto error;
}
}
else
if (!string_list_append(list, path, attr))
goto error;
return list;
error:
string_list_free(list);
return NULL;
}
static int file_archive_parse_file_init(file_archive_transfer_t *state,
const char *file)
{
char path[PATH_MAX_LENGTH];
char *last = NULL;
path[0] = '\0';
strlcpy(path, file, sizeof(path));
last = (char*)path_get_archive_delim(path);
if (last)
*last = '\0';
state->backend = file_archive_get_file_backend(path);
if (!state->backend)
return -1;
state->handle = file_archive_open(path);
if (!state->handle)
return -1;
state->archive_size = file_archive_size(state->handle);
state->data = file_archive_data(state->handle);
state->footer = 0;
state->directory = 0;
return state->backend->archive_parse_file_init(state, path);
}
bool core_info_database_supports_content_path(const char *database_path, const char *path)
{
size_t i;
char *database = NULL;
const char *delim = NULL;
const char *archive_path = NULL;
if (!core_info_curr_list)
return false;
database = strdup(path_basename(database_path));
path_remove_extension(database);
delim = path_get_archive_delim(path);
if (delim)
archive_path = delim - 1;
/* if the path contains a compressed file and the core supports archives,
* we don't want to look at this file */
if (archive_path)
{
for (i = 0; i < core_info_curr_list->count; i++)
{
const core_info_t *info = &core_info_curr_list->list[i];
if (!string_list_find_elem(info->databases_list, database))
continue;
if ( !string_list_find_elem(info->supported_extensions_list, "zip")
&& !string_list_find_elem(info->supported_extensions_list, "7z"))
continue;
free(database);
return false;
}
}
for (i = 0; i < core_info_curr_list->count; i++)
{
const core_info_t *info = &core_info_curr_list->list[i];
if (!string_list_find_elem(info->supported_extensions_list, path_get_extension(path)))
continue;
if (!string_list_find_elem(info->databases_list, database))
continue;
free(database);
return true;
}
free(database);
return false;
}
/**
* path_basename:
* @path : path
*
* Get basename from @path.
*
* Returns: basename from path.
**/
const char *path_basename(const char *path)
{
/* We cut either at the first compression-related hash
* or the last slash; whichever comes last */
const char *last = find_last_slash(path);
const char *delim = path_get_archive_delim(path);
if (delim)
return delim + 1;
if (last)
return last + 1;
return path;
}
static int file_archive_extract_cb(const char *name, const char *valid_exts,
const uint8_t *cdata,
unsigned cmode, uint32_t csize, uint32_t size,
uint32_t checksum, struct archive_extract_userdata *userdata)
{
const char *ext = path_get_extension(name);
/* Extract first file that matches our list. */
if (ext && string_list_find_elem(userdata->ext, ext))
{
char new_path[PATH_MAX_LENGTH];
char wanted_file[PATH_MAX_LENGTH];
const char *delim = NULL;
new_path[0] = wanted_file[0] = '\0';
if (userdata->extraction_directory)
fill_pathname_join(new_path, userdata->extraction_directory,
path_basename(name), sizeof(new_path));
else
fill_pathname_resolve_relative(new_path, userdata->archive_path,
path_basename(name), sizeof(new_path));
userdata->first_extracted_file_path = strdup(new_path);
delim = path_get_archive_delim(userdata->archive_path);
if (delim)
{
strlcpy(wanted_file, delim + 1, sizeof(wanted_file));
if (!string_is_equal_noncase(userdata->extracted_file_path,
wanted_file))
return 1; /* keep searching for the right file */
}
else
strlcpy(wanted_file, userdata->archive_path, sizeof(wanted_file));
if (file_archive_perform_mode(new_path,
valid_exts, cdata, cmode, csize, size,
0, userdata))
userdata->found_file = true;
return 0;
}
return 1;
}
/**
* path_basedir:
* @path : path
*
* Extracts base directory by mutating path.
* Keeps trailing '/'.
**/
void path_basedir_wrapper(char *path)
{
char *last = NULL;
if (strlen(path) < 2)
return;
#ifdef HAVE_COMPRESSION
/* We want to find the directory with the archive in basedir. */
last = (char*)path_get_archive_delim(path);
if (last)
*last = '\0';
#endif
last = find_last_slash(path);
if (last)
last[1] = '\0';
else
snprintf(path, 3, ".%s", path_default_slash());
}
bool core_info_unsupported_content_path(const char *path)
{
size_t i;
const char *archive_path = NULL;
const char *delim = path_get_archive_delim(path);
if (delim)
archive_path = delim - 1;
if (!core_info_curr_list)
return false;
/* if the path contains a compressed file and the core supports archives,
* we don't want to look at this file */
if (archive_path)
{
for (i = 0; i < core_info_curr_list->count; i++)
{
const core_info_t *info = &core_info_curr_list->list[i];
if ( !string_list_find_elem(info->supported_extensions_list, "zip")
&& !string_list_find_elem(info->supported_extensions_list, "7z"))
continue;
return false;
}
}
for (i = 0; i < core_info_curr_list->count; i++)
{
const core_info_t *info = &core_info_curr_list->list[i];
if (string_list_find_elem(info->supported_extensions_list, path_get_extension(path)))
return false;
}
return true;
}
/**
* path_contains_compressed_file:
* @path : path
*
* Checks if path contains a compressed file.
*
* Currently we only check for a hash symbol (#) inside the pathname
* that is preceded by an archive extension. If path is ever expanded
* to a general URI, we should check for that here.
*
* Example: Somewhere in the path there might be a compressed file
* E.g.: /path/to/file.7z#mygame.img
*
* Returns: true (1) if path contains compressed file, otherwise false (0).
**/
bool path_contains_compressed_file(const char *path)
{
return path_get_archive_delim(path) != NULL;
}
/**
* file_archive_get_file_crc32:
* @path : filename path of archive
*
* Returns: CRC32 of the specified file in the archive, otherwise 0.
* If no path within the archive is specified, the first
* file found inside is used.
**/
uint32_t file_archive_get_file_crc32(const char *path)
{
file_archive_transfer_t state;
const struct file_archive_file_backend *backend = file_archive_get_file_backend(path);
struct archive_extract_userdata userdata = {{0}};
bool returnerr = false;
bool contains_compressed = false;
const char *archive_path = NULL;
if (!backend)
return 0;
contains_compressed = path_contains_compressed_file(path);
if (contains_compressed)
{
archive_path = path_get_archive_delim(path);
/* move pointer right after the delimiter to give us the path */
if (archive_path)
archive_path += 1;
}
state.type = ARCHIVE_TRANSFER_INIT;
state.archive_size = 0;
state.handle = NULL;
state.stream = NULL;
state.footer = NULL;
state.directory = NULL;
state.data = NULL;
state.backend = NULL;
/* Initialize and open archive first.
Sets next state type to ITERATE. */
file_archive_parse_file_iterate(&state,
&returnerr, path, NULL, NULL,
&userdata);
for (;;)
{
/* Now find the first file in the archive. */
if (state.type == ARCHIVE_TRANSFER_ITERATE)
file_archive_parse_file_iterate(&state,
&returnerr, path, NULL, NULL,
&userdata);
/* If no path specified within archive, stop after
* finding the first file.
*/
if (!contains_compressed)
break;
/* Stop when the right file in the archive is found. */
if (archive_path)
{
if (string_is_equal(userdata.extracted_file_path, archive_path))
break;
}
else
break;
}
file_archive_parse_file_iterate_stop(&state);
if (userdata.crc)
return userdata.crc;
return 0;
}
