1 #include "compressed_seq.h"
13 static inline cmph_uint32 compressed_seq_i_log2(cmph_uint32 x)
15 register cmph_uint32 res = 0;
25 void compressed_seq_init(compressed_seq_t * cs)
27 select_init(&cs->sel);
35 void compressed_seq_destroy(compressed_seq_t * cs)
37 free(cs->store_table);
39 free(cs->length_rems);
41 select_destroy(&cs->sel);
45 void compressed_seq_generate(compressed_seq_t * cs, cmph_uint32 * vals_table, cmph_uint32 n)
47 register cmph_uint32 i;
48 // lengths: represents lengths of encoded values
49 register cmph_uint32 * lengths = (cmph_uint32 *)calloc(n, sizeof(cmph_uint32));
50 register cmph_uint32 rems_mask;
51 register cmph_uint32 stored_value;
56 for(i = 0; i < cs->n; i++)
58 if(vals_table[i] == 0)
64 lengths[i] = compressed_seq_i_log2(vals_table[i] + 1);
65 cs->total_length += lengths[i];
71 free(cs->store_table);
73 cs->store_table = (cmph_uint32 *) calloc(((cs->total_length + 31) >> 5), sizeof(cmph_uint32));
76 for(i = 0; i < cs->n; i++)
78 if(vals_table[i] == 0)
80 stored_value = vals_table[i] - ((1U << lengths[i]) - 1U);
81 set_bits_at_pos(cs->store_table, cs->total_length, stored_value, lengths[i]);
82 cs->total_length += lengths[i];
85 cs->rem_r = compressed_seq_i_log2(cs->total_length/cs->n);
94 free(cs->length_rems);
97 cs->length_rems = (cmph_uint32 *) calloc(BITS_TABLE_SIZE(cs->n, cs->rem_r), sizeof(cmph_uint32));
99 rems_mask = (1U << cs->rem_r) - 1U;
100 cs->total_length = 0;
102 for(i = 0; i < cs->n; i++)
104 cs->total_length += lengths[i];
105 set_bits_value(cs->length_rems, i, cs->total_length & rems_mask, cs->rem_r, rems_mask);
106 lengths[i] = cs->total_length >> cs->rem_r;
109 select_init(&cs->sel);
111 // FABIANO: before it was (cs->total_length >> cs->rem_r) + 1. But I wiped out the + 1 because
112 // I changed the select structure to work up to m, instead of up to m - 1.
113 select_generate(&cs->sel, lengths, cs->n, (cs->total_length >> cs->rem_r));
118 cmph_uint32 compressed_seq_get_space_usage(compressed_seq_t * cs)
120 register cmph_uint32 space_usage = select_get_space_usage(&cs->sel);
121 space_usage += ((cs->total_length + 31) >> 5) * (cmph_uint32)sizeof(cmph_uint32) * 8;
122 space_usage += BITS_TABLE_SIZE(cs->n, cs->rem_r) * (cmph_uint32)sizeof(cmph_uint32) * 8;
123 return 4 * (cmph_uint32)sizeof(cmph_uint32) * 8 + space_usage;
126 cmph_uint32 compressed_seq_query(compressed_seq_t * cs, cmph_uint32 idx)
128 register cmph_uint32 enc_idx, enc_length;
129 register cmph_uint32 rems_mask;
130 register cmph_uint32 stored_value;
131 register cmph_uint32 sel_res;
133 assert(idx < cs->n); // FABIANO ADDED
135 rems_mask = (1U << cs->rem_r) - 1U;
140 sel_res = select_query(&cs->sel, idx);
144 sel_res = select_query(&cs->sel, idx - 1);
146 enc_idx = (sel_res - (idx - 1)) << cs->rem_r;
147 enc_idx += get_bits_value(cs->length_rems, idx-1, cs->rem_r, rems_mask);
149 sel_res = select_next_query(&cs->sel, sel_res);
152 enc_length = (sel_res - idx) << cs->rem_r;
153 enc_length += get_bits_value(cs->length_rems, idx, cs->rem_r, rems_mask);
154 enc_length -= enc_idx;
158 stored_value = get_bits_at_pos(cs->store_table, enc_idx, enc_length);
159 return stored_value + ((1U << enc_length) - 1U);
162 void compressed_seq_dump(compressed_seq_t * cs, char ** buf, cmph_uint32 * buflen)
164 register cmph_uint32 sel_size = select_packed_size(&(cs->sel));
165 register cmph_uint32 length_rems_size = BITS_TABLE_SIZE(cs->n, cs->rem_r) * 4;
166 register cmph_uint32 store_table_size = ((cs->total_length + 31) >> 5) * 4;
167 register cmph_uint32 pos = 0;
169 cmph_uint32 buflen_sel = 0;
171 *buflen = 4*(cmph_uint32)sizeof(cmph_uint32) + sel_size + length_rems_size + store_table_size;
173 DEBUGP("sel_size = %u\n", sel_size);
174 DEBUGP("length_rems_size = %u\n", length_rems_size);
175 DEBUGP("store_table_size = %u\n", store_table_size);
176 *buf = (char *)calloc(*buflen, sizeof(char));
184 // dumping n, rem_r and total_length
185 memcpy(*buf, &(cs->n), sizeof(cmph_uint32));
186 pos += (cmph_uint32)sizeof(cmph_uint32);
187 DEBUGP("n = %u\n", cs->n);
189 memcpy(*buf + pos, &(cs->rem_r), sizeof(cmph_uint32));
190 pos += (cmph_uint32)sizeof(cmph_uint32);
191 DEBUGP("rem_r = %u\n", cs->rem_r);
193 memcpy(*buf + pos, &(cs->total_length), sizeof(cmph_uint32));
194 pos += (cmph_uint32)sizeof(cmph_uint32);
195 DEBUGP("total_length = %u\n", cs->total_length);
199 select_dump(&cs->sel, &buf_sel, &buflen_sel);
200 memcpy(*buf + pos, &buflen_sel, sizeof(cmph_uint32));
201 pos += (cmph_uint32)sizeof(cmph_uint32);
202 DEBUGP("buflen_sel = %u\n", buflen_sel);
204 memcpy(*buf + pos, buf_sel, buflen_sel);
207 for(i = 0; i < buflen_sel; i++)
209 DEBUGP("pos = %u -- buf_sel[%u] = %u\n", pos, i, *(*buf + pos + i));
216 // dumping length_rems
217 memcpy(*buf + pos, cs->length_rems, length_rems_size);
219 for(i = 0; i < length_rems_size; i++)
221 DEBUGP("pos = %u -- length_rems_size = %u -- length_rems[%u] = %u\n", pos, length_rems_size, i, *(*buf + pos + i));
224 pos += length_rems_size;
226 // dumping store_table
227 memcpy(*buf + pos, cs->store_table, store_table_size);
230 for(i = 0; i < store_table_size; i++)
232 DEBUGP("pos = %u -- store_table_size = %u -- store_table[%u] = %u\n", pos, store_table_size, i, *(*buf + pos + i));
235 DEBUGP("Dumped compressed sequence structure with size %u bytes\n", *buflen);
238 void compressed_seq_load(compressed_seq_t * cs, const char * buf, cmph_uint32 buflen)
240 register cmph_uint32 pos = 0;
241 cmph_uint32 buflen_sel = 0;
242 register cmph_uint32 length_rems_size = 0;
243 register cmph_uint32 store_table_size = 0;
245 // loading n, rem_r and total_length
246 memcpy(&(cs->n), buf, sizeof(cmph_uint32));
247 pos += (cmph_uint32)sizeof(cmph_uint32);
248 DEBUGP("n = %u\n", cs->n);
250 memcpy(&(cs->rem_r), buf + pos, sizeof(cmph_uint32));
251 pos += (cmph_uint32)sizeof(cmph_uint32);
252 DEBUGP("rem_r = %u\n", cs->rem_r);
254 memcpy(&(cs->total_length), buf + pos, sizeof(cmph_uint32));
255 pos += (cmph_uint32)sizeof(cmph_uint32);
256 DEBUGP("total_length = %u\n", cs->total_length);
259 memcpy(&buflen_sel, buf + pos, sizeof(cmph_uint32));
260 pos += (cmph_uint32)sizeof(cmph_uint32);
261 DEBUGP("buflen_sel = %u\n", buflen_sel);
263 select_load(&cs->sel, buf + pos, buflen_sel);
266 for(i = 0; i < buflen_sel; i++)
268 DEBUGP("pos = %u -- buf_sel[%u] = %u\n", pos, i, *(buf + pos + i));
273 // loading length_rems
276 free(cs->length_rems);
278 length_rems_size = BITS_TABLE_SIZE(cs->n, cs->rem_r);
279 cs->length_rems = (cmph_uint32 *) calloc(length_rems_size, sizeof(cmph_uint32));
280 length_rems_size *= 4;
281 memcpy(cs->length_rems, buf + pos, length_rems_size);
284 for(i = 0; i < length_rems_size; i++)
286 DEBUGP("pos = %u -- length_rems_size = %u -- length_rems[%u] = %u\n", pos, length_rems_size, i, *(buf + pos + i));
289 pos += length_rems_size;
291 // loading store_table
292 store_table_size = ((cs->total_length + 31) >> 5);
295 free(cs->store_table);
297 cs->store_table = (cmph_uint32 *) calloc(store_table_size, sizeof(cmph_uint32));
298 store_table_size *= 4;
299 memcpy(cs->store_table, buf + pos, store_table_size);
302 for(i = 0; i < store_table_size; i++)
304 DEBUGP("pos = %u -- store_table_size = %u -- store_table[%u] = %u\n", pos, store_table_size, i, *(buf + pos + i));
308 DEBUGP("Loaded compressed sequence structure with size %u bytes\n", buflen);
311 void compressed_seq_pack(compressed_seq_t *cs, void *cs_packed)
316 cmph_uint32 buflen = 0;
317 compressed_seq_dump(cs, &buf, &buflen);
318 memcpy(cs_packed, buf, buflen);
324 cmph_uint32 compressed_seq_packed_size(compressed_seq_t *cs)
326 register cmph_uint32 sel_size = select_packed_size(&cs->sel);
327 register cmph_uint32 store_table_size = ((cs->total_length + 31) >> 5) * (cmph_uint32)sizeof(cmph_uint32);
328 register cmph_uint32 length_rems_size = BITS_TABLE_SIZE(cs->n, cs->rem_r) * (cmph_uint32)sizeof(cmph_uint32);
329 return 4 * (cmph_uint32)sizeof(cmph_uint32) + sel_size + store_table_size + length_rems_size;
333 cmph_uint32 compressed_seq_query_packed(void * cs_packed, cmph_uint32 idx)
335 // unpacking cs_packed
336 register cmph_uint32 *ptr = (cmph_uint32 *)cs_packed;
337 register cmph_uint32 n = *ptr++;
338 register cmph_uint32 rem_r = *ptr++;
339 ptr++; // skipping total_length
340 // register cmph_uint32 total_length = *ptr++;
341 register cmph_uint32 buflen_sel = *ptr++;
342 register cmph_uint32 * sel_packed = ptr;
343 register cmph_uint32 * length_rems = (ptr += (buflen_sel >> 2));
344 register cmph_uint32 length_rems_size = BITS_TABLE_SIZE(n, rem_r);
345 register cmph_uint32 * store_table = (ptr += length_rems_size);
347 // compressed sequence query computation
348 register cmph_uint32 enc_idx, enc_length;
349 register cmph_uint32 rems_mask;
350 register cmph_uint32 stored_value;
351 register cmph_uint32 sel_res;
353 rems_mask = (1U << rem_r) - 1U;
358 sel_res = select_query_packed(sel_packed, idx);
362 sel_res = select_query_packed(sel_packed, idx - 1);
364 enc_idx = (sel_res - (idx - 1)) << rem_r;
365 enc_idx += get_bits_value(length_rems, idx-1, rem_r, rems_mask);
367 sel_res = select_next_query_packed(sel_packed, sel_res);
370 enc_length = (sel_res - idx) << rem_r;
371 enc_length += get_bits_value(length_rems, idx, rem_r, rems_mask);
372 enc_length -= enc_idx;
376 stored_value = get_bits_at_pos(store_table, enc_idx, enc_length);
377 return stored_value + ((1U << enc_length) - 1U);