static int file_archive_parse_file_init(file_archive_transfer_t *state,
const char *file)
{
state->backend = file_archive_get_default_file_backend();
if (!state->backend)
return -1;
state->handle = file_archive_open(file);
if (!state->handle)
return -1;
state->zip_size = file_archive_size(state->handle);
if (state->zip_size < 22)
return -1;
state->data = file_archive_data(state->handle);
state->footer = state->data + state->zip_size - 22;
for (;; state->footer--)
{
if (state->footer <= state->data + 22)
return -1;
if (read_le(state->footer, 4) == END_OF_CENTRAL_DIR_SIGNATURE)
{
unsigned comment_len = read_le(state->footer + 20, 2);
if (state->footer + 22 + comment_len == state->data + state->zip_size)
break;
}
}
state->directory = state->data + read_le(state->footer + 16, 4);
return 0;
}
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);
}
