void file_archive_parse_file_iterate_stop(file_archive_transfer_t *state)
{
if (!state || !state->handle)
return;
state->type = ZLIB_TRANSFER_DEINIT;
file_archive_parse_file_iterate(state, NULL, NULL, NULL, NULL, NULL);
}
/**
* file_archive_parse_file:
* @file : filename path of archive
* @valid_exts : Valid extensions of archive to be parsed.
* If NULL, allow all.
* @file_cb : file_cb function pointer
* @userdata : userdata to pass to file_cb function pointer.
*
* Low-level file parsing. Enumerates over all files and calls
* file_cb with userdata.
*
* Returns: true (1) on success, otherwise false (0).
**/
static bool file_archive_parse_file(const char *file, const char *valid_exts,
file_archive_file_cb file_cb, void *userdata)
{
file_archive_transfer_t state = {0};
bool returnerr = true;
state.type = ZLIB_TRANSFER_INIT;
for (;;)
{
if (file_archive_parse_file_iterate(&state, &returnerr, file,
valid_exts, file_cb, userdata) != 0)
break;
}
return returnerr;
}
static void rarch_task_decompress_handler_subdir(rarch_task_t *task)
{
bool retdec;
decompress_state_t *dec = (decompress_state_t*)task->state;
int ret = file_archive_parse_file_iterate(&dec->zlib,
&retdec, dec->source_file,
dec->valid_ext, file_decompressed_subdir, dec);
task->progress = file_archive_parse_file_progress(&dec->zlib);
if (task->cancelled || ret != 0)
{
task->error = dec->callback_error;
file_archive_parse_file_iterate_stop(&dec->zlib);
rarch_task_decompress_handler_finished(task, dec);
}
}
static int zip_file_read(
const char *path,
const char *needle, void **buf,
const char *optional_outfile)
{
file_archive_transfer_t zlib;
struct archive_extract_userdata userdata = {{0}};
bool returnerr = true;
int ret = 0;
zlib.type = ARCHIVE_TRANSFER_INIT;
userdata.decomp_state.needle = NULL;
userdata.decomp_state.opt_file = NULL;
userdata.decomp_state.found = false;
userdata.decomp_state.buf = buf;
if (needle)
userdata.decomp_state.needle = strdup(needle);
if (optional_outfile)
userdata.decomp_state.opt_file = strdup(optional_outfile);
do
{
ret = file_archive_parse_file_iterate(&zlib, &returnerr, path,
"", zip_file_decompressed, &userdata);
if (!returnerr)
break;
}while(ret == 0 && !userdata.decomp_state.found);
file_archive_parse_file_iterate_stop(&zlib);
if (userdata.decomp_state.opt_file)
free(userdata.decomp_state.opt_file);
if (userdata.decomp_state.needle)
free(userdata.decomp_state.needle);
if (!userdata.decomp_state.found)
return -1;
return (int)userdata.decomp_state.size;
}
static int content_zip_file_read(
const char *path,
const char *needle, void **buf,
const char* optional_outfile)
{
file_archive_transfer_t zlib;
struct decomp_state st;
bool returnerr = true;
int ret = 0;
zlib.type = ZLIB_TRANSFER_INIT;
st.needle = NULL;
st.opt_file = NULL;
st.found = false;
st.buf = buf;
if (needle)
st.needle = strdup(needle);
if (optional_outfile)
st.opt_file = strdup(optional_outfile);
do
{
ret = file_archive_parse_file_iterate(&zlib, &returnerr, path,
"", content_zip_file_decompressed, &st);
if (!returnerr)
break;
}while(ret == 0 && !st.found);
file_archive_parse_file_iterate_stop(&zlib);
if (st.opt_file)
free(st.opt_file);
if (st.needle)
free(st.needle);
if (!st.found)
return -1;
return st.size;
}
static int task_database_iterate_playlist_zip(
database_state_handle_t *db_state,
database_info_handle_t *db, const char *name)
{
bool returnerr = true;
#ifdef HAVE_ZLIB
if (db_state->crc != 0)
return task_database_iterate_crc_lookup(
db_state, db, db_state->zip_name);
if (file_archive_parse_file_iterate(&db->state,
&returnerr, name, NULL, zlib_compare_crc32,
(void*)db_state) != 0)
return 0;
if (db_state->crc)
file_archive_parse_file_iterate_stop(&db->state);
#endif
return 1;
}
/**
* file_archive_walk:
* @file : filename path of archive
* @valid_exts : Valid extensions of archive to be parsed.
* If NULL, allow all.
* @file_cb : file_cb function pointer
* @userdata : userdata to pass to file_cb function pointer.
*
* Low-level file parsing. Enumerates over all files and calls
* file_cb with userdata.
*
* Returns: true (1) on success, otherwise false (0).
**/
static bool file_archive_walk(const char *file, const char *valid_exts,
file_archive_file_cb file_cb, struct archive_extract_userdata *userdata)
{
file_archive_transfer_t state;
bool returnerr = true;
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;
for (;;)
{
if (file_archive_parse_file_iterate(&state, &returnerr, file,
valid_exts, file_cb, userdata) != 0)
break;
}
return returnerr;
}
/**
* 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;
}
