/**
* @brief Open an existing stdio file using a codec instance with the specified options
*
* @param fp the stdio file to use
* @param codec codec to use
* @param options options
* @return The opened file, or *NULL* on error
* @see squash_file_steal_codec
* @see squash_file_steal_with_options
* @see squash_file_steal_codec_with_options
*/
SquashFile*
squash_file_steal_codec_with_options (SquashCodec* codec, FILE* fp, SquashOptions* options) {
assert (fp != NULL);
assert (codec != NULL);
SquashFile* file = malloc (sizeof (SquashFile));
if (file == NULL)
return NULL;
file->fp = fp;
file->eof = false;
file->stream = NULL;
file->last_status = SQUASH_OK;
file->codec = codec;
file->options = (options != NULL) ? squash_object_ref (options) : NULL;
#if defined(SQUASH_MMAP_IO)
file->map = squash_mapped_file_empty;
#endif
mtx_init (&(file->mtx), mtx_recursive);
SQUASH_FLOCKFILE(fp);
return file;
}
/**
* @brief Decompress a buffer with an existing @ref SquashOptions
*
* @param codec The codec to use
* @param[out] decompressed Location to store the decompressed data
* @param[in,out] decompressed_length Location storing the size of the
* @a decompressed buffer on input, replaced with the actual size of
* the decompressed data
* @param compressed The compressed data
* @param compressed_length Length of the compressed data (in bytes)
* @param options Compression options
* @return A status code
*/
SquashStatus
squash_codec_decompress_with_options (SquashCodec* codec,
size_t* decompressed_length,
uint8_t decompressed[SQUASH_ARRAY_PARAM(*decompressed_length)],
size_t compressed_length,
const uint8_t compressed[SQUASH_ARRAY_PARAM(compressed_length)],
SquashOptions* options) {
SquashCodecImpl* impl = NULL;
assert (codec != NULL);
impl = squash_codec_get_impl (codec);
if (impl == NULL)
return squash_error (SQUASH_UNABLE_TO_LOAD);
if (decompressed == compressed)
return squash_error (SQUASH_INVALID_BUFFER);
if (impl->decompress_buffer != NULL) {
SquashStatus res;
res = impl->decompress_buffer (codec,
decompressed_length, decompressed,
compressed_length, compressed,
squash_object_ref (options));
squash_object_unref (options);
return res;
} else {
SquashStatus status;
SquashStream* stream;
stream = squash_codec_create_stream_with_options (codec, SQUASH_STREAM_DECOMPRESS, options);
stream->next_in = compressed;
stream->avail_in = compressed_length;
stream->next_out = decompressed;
stream->avail_out = *decompressed_length;
do {
status = squash_stream_process (stream);
} while (status == SQUASH_PROCESSING);
if (status == SQUASH_END_OF_STREAM) {
status = SQUASH_OK;
*decompressed_length = stream->total_out;
} else if (status == SQUASH_OK) {
do {
status = squash_stream_finish (stream);
} while (status == SQUASH_PROCESSING);
if (status == SQUASH_OK) {
*decompressed_length = stream->total_out;
}
}
assert (stream->stream_type == SQUASH_STREAM_DECOMPRESS);
squash_object_unref (stream);
return status;
}
}
/**
* @brief Initialize a stream.
* @protected
*
* @warning This function must only be used to implement a subclass of
* @ref SquashStream. Streams returned by other functions will
* already be initialized, and you *must* *not* call this function on
* them; doing so will likely trigger a memory leak.
*
* @param stream The stream to initialize.
* @param codec The codec to use.
* @param stream_type The stream type.
* @param options The options.
* @param destroy_notify Function to call to destroy the instance.
*
* @see squash_object_init
*/
void
squash_stream_init (void* stream,
SquashCodec* codec,
SquashStreamType stream_type,
SquashOptions* options,
SquashDestroyNotify destroy_notify) {
SquashStream* s;
assert (stream != NULL);
s = (SquashStream*) stream;
squash_object_init (stream, false, destroy_notify);
s->next_in = NULL;
s->avail_in = 0;
s->total_in = 0;
s->next_out = NULL;
s->avail_out = 0;
s->total_out = 0;
s->codec = codec;
s->options = (options != NULL) ? squash_object_ref (options) : NULL;
s->stream_type = stream_type;
s->state = SQUASH_STREAM_STATE_IDLE;
s->user_data = NULL;
s->destroy_user_data = NULL;
if (codec->impl.create_stream == NULL && codec->impl.splice != NULL) {
s->priv = squash_malloc (sizeof (SquashStreamPrivate));
mtx_init (&(s->priv->io_mtx), mtx_plain);
mtx_lock (&(s->priv->io_mtx));
s->priv->request = SQUASH_OPERATION_INVALID;
cnd_init (&(s->priv->request_cnd));
s->priv->result = SQUASH_STATUS_INVALID;
cnd_init (&(s->priv->result_cnd));
s->priv->finished = false;
#if !defined(NDEBUG)
int res =
#endif
thrd_create (&(s->priv->thread), (thrd_start_t) squash_stream_thread_func, s);
assert (res == thrd_success);
while (s->priv->result == SQUASH_STATUS_INVALID)
cnd_wait (&(s->priv->result_cnd), &(s->priv->io_mtx));
s->priv->result = SQUASH_STATUS_INVALID;
} else {
s->priv = NULL;
}
}