void rdbuf::init(std::istream &file, std::streampos start, std::streampos size, std::streampos decomp)
{
buf_base::init(file);
ptr_ = 0;
start_ = start;
size_ = size;
decomp_ = decomp;
if (lzma_raw_decoder(&lzma_, default_filters) != LZMA_OK) throw compress_error{"Stream decoder setup failed"};
}
void memrdbuf::reset()
{
action_ = LZMA_RUN;
lzma_ = LZMA_STREAM_INIT;
if (lzma_raw_decoder(&lzma_, default_filters) != LZMA_OK) throw compress_error{"Stream decoder setup failed"};
pos_ = 0;
char *begin = &buf_[0];
setg(begin, begin, begin);
lzma_.next_in = reinterpret_cast<const uint8_t*>(source_);
lzma_.avail_in = size_;
ff_to(start_);
}
static int
Decompressor_init_raw(lzma_stream *lzs, PyObject *filterspecs)
{
lzma_filter filters[LZMA_FILTERS_MAX + 1];
lzma_ret lzret;
if (parse_filter_chain_spec(filters, filterspecs) == -1)
return -1;
lzret = lzma_raw_decoder(lzs, filters);
free_filter_chain(filters);
if (catch_lzma_error(lzret))
return -1;
else
return 0;
}
static lzma_stream * init_raw_lzma_stream(lzma_vli filter, lzma_options_lzma & options) {
options.preset_dict = NULL;
if(options.dict_size > (uint32_t(1) << 28)) {
throw lzma_error("inno lzma dict size too large", LZMA_FORMAT_ERROR);
}
lzma_stream * strm = new lzma_stream;
lzma_stream tmp = LZMA_STREAM_INIT;
*strm = tmp;
strm->allocator = NULL;
const lzma_filter filters[2] = { { filter, &options }, { LZMA_VLI_UNKNOWN, NULL } };
lzma_ret ret = lzma_raw_decoder(strm, filters);
if(ret != LZMA_OK) {
delete strm;
throw lzma_error("inno lzma init error", ret);
}
return strm;
}
void decompress(std::istream &in, std::ostream &out)
{
lzma_stream stream = LZMA_STREAM_INIT;
if (lzma_raw_decoder(&stream, default_filters) != LZMA_OK) throw compress_error{"Stream decoder setup failed"};
code(stream, in, out);
}
