/* ////////////////////////////////////////////////////////////////////////////////////// * main */ tb_int_t tb_demo_memory_buffer_main(tb_int_t argc, tb_char_t** argv) { tb_buffer_t b; tb_buffer_init(&b); tb_buffer_memncpy(&b, (tb_byte_t const*)"hello ", 6); tb_buffer_memncat(&b, (tb_byte_t const*)"world", 6); tb_trace_i("%s", tb_buffer_data(&b)); tb_buffer_exit(&b); return 0; }
tb_bool_t tb_filter_push(tb_filter_ref_t self, tb_byte_t const* data, tb_size_t size) { // check tb_filter_t* filter = (tb_filter_t*)self; tb_assert_and_check_return_val(filter && data && size, tb_false); // push data tb_bool_t ok = tb_buffer_memncat(&filter->idata, data, size)? tb_true : tb_false; // save the input offset if (ok) filter->offset += size; // ok? return ok; }
tb_long_t tb_filter_spak(tb_filter_ref_t self, tb_byte_t const* data, tb_size_t size, tb_byte_t const** pdata, tb_size_t need, tb_long_t sync) { // check tb_filter_t* filter = (tb_filter_t*)self; tb_assert_and_check_return_val(filter && filter->spak && pdata, -1); // init odata *pdata = tb_null; // save the input offset filter->offset += size; // eof? if (filter->limit >= 0 && filter->offset == filter->limit) filter->beof = tb_true; // eof? sync it if (filter->beof) sync = -1; // the idata tb_byte_t const* idata = tb_buffer_data(&filter->idata); tb_size_t isize = tb_buffer_size(&filter->idata); if (data && size) { // append data to cache if have the cache data if (idata && isize) { // trace tb_trace_d("[%p]: append idata: %lu", self, size); // append data idata = tb_buffer_memncat(&filter->idata, data, size); isize = tb_buffer_size(&filter->idata); } // using the data directly if no cache data else { // trace tb_trace_d("[%p]: using idata directly: %lu", self, size); // using it directly idata = data; isize = size; } } // sync data if null else { // check sync tb_assert_and_check_return_val(sync, 0); } // the need if (!need) need = tb_max(size, tb_queue_buffer_maxn(&filter->odata)); tb_assert_and_check_return_val(need, -1); // init pull tb_size_t omaxn = 0; tb_byte_t* odata = tb_queue_buffer_pull_init(&filter->odata, &omaxn); if (odata) { // the osize tb_long_t osize = omaxn >= need? need : 0; // exit pull if (odata) tb_queue_buffer_pull_exit(&filter->odata, osize > 0? osize : 0); // enough? if (osize > 0) { // append to the cache if idata is not belong to the cache if (size && idata == data) tb_buffer_memncat(&filter->idata, data, size); // return it directly *pdata = odata; return osize; } } // grow odata maxn if not enough if (need > tb_queue_buffer_maxn(&filter->odata)) tb_queue_buffer_resize(&filter->odata, need); // the odata omaxn = 0; odata = tb_queue_buffer_push_init(&filter->odata, &omaxn); tb_assert_and_check_return_val(odata && omaxn, -1); // init stream tb_static_stream_t istream = {0}; tb_static_stream_t ostream = {0}; if (idata && isize) { // @note istream maybe null for sync the end data if (!tb_static_stream_init(&istream, (tb_byte_t*)idata, isize)) return -1; } if (!tb_static_stream_init(&ostream, (tb_byte_t*)odata, omaxn)) return -1; // trace tb_trace_d("[%p]: spak: ileft: %lu, oleft: %lu, offset: %llu, limit: %lld, beof: %d: ..", self, tb_buffer_size(&filter->idata), tb_queue_buffer_size(&filter->odata), filter->offset, filter->limit, filter->beof); // spak data tb_long_t osize = filter->spak(filter, &istream, &ostream, sync); // eof? if (osize < 0) filter->beof = tb_true; // no data and eof? if (!osize && !tb_static_stream_left(&istream) && filter->beof) osize = -1; // eof? sync it if (filter->beof) sync = -1; // exit odata tb_queue_buffer_push_exit(&filter->odata, osize > 0? osize : 0); // have the left idata? tb_size_t left = tb_static_stream_left(&istream); if (left) { // move to the cache head if idata is belong to the cache if (idata != data) { // trace tb_trace_d("[%p]: move to the cache head: %lu", self, left); tb_buffer_memnmov(&filter->idata, tb_static_stream_offset(&istream), left); } // append to the cache if idata is not belong to the cache else { // trace tb_trace_d("[%p]: append to the cache: %lu", self, left); tb_buffer_memncat(&filter->idata, tb_static_stream_pos(&istream), left); } } // clear the cache else tb_buffer_clear(&filter->idata); // init pull omaxn = 0; odata = tb_queue_buffer_pull_init(&filter->odata, &omaxn); // no sync? cache the output data if (!sync) osize = omaxn >= need? need : 0; // sync and has data? return it directly else if (omaxn) osize = tb_min(omaxn, need); // sync, no data or end? // else osize = osize; // exit pull if (odata) tb_queue_buffer_pull_exit(&filter->odata, osize > 0? osize : 0); // return it if have the odata if (osize > 0) *pdata = odata; // trace tb_trace_d("[%p]: spak: ileft: %lu, oleft: %lu, offset: %llu, limit: %lld, beof: %d: %ld", self, tb_buffer_size(&filter->idata), tb_queue_buffer_size(&filter->odata), filter->offset, filter->limit, filter->beof, osize); // ok? return osize; }
tb_byte_t* tb_buffer_memcat(tb_buffer_t* buffer, tb_buffer_t* b) { return tb_buffer_memncat(buffer, tb_buffer_data(b), tb_buffer_size(b)); }