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update: reuse the quick sort algorithm

master
Dnomd343 2 years ago
parent
fbbecd2664
commit
17d3cbd0b8
4 changed files with 33 additions and 88 deletions
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  1. 105
      src/all_cases/basic_ranges.cc
  2. 3
      src/all_cases/basic_ranges.h
  3. 9
      src/common_code/common_code.cc
  4. 4
      src/main.cc

105
src/all_cases/basic_ranges.cc
View File

@ -7,13 +7,11 @@ std::mutex BasicRanges::building;
bool BasicRanges::available = false;
std::vector<uint32_t> BasicRanges::data;
inline uint32_t binary_count(uint32_t bin) { // get number of non-zero bits
bin -= (bin >> 1) & 0x55555555;
bin = (bin & 0x33333333) + ((bin >> 2) & 0x33333333);
bin = ((bin >> 4) + bin) & 0x0F0F0F0F;
bin += bin >> 8;
bin += bin >> 16;
return bin & 0b111111;
const std::vector<uint32_t>* BasicRanges::fetch() { // get basic ranges content
if (status() != AVAILABLE) {
BasicRanges::build(); // basic ranges initialize
}
return &BasicRanges::data; // return const ptr
}
BasicRanges::Status BasicRanges::status() { // get basic ranges status
@ -27,13 +25,6 @@ BasicRanges::Status BasicRanges::status() { // get basic ranges status
return NO_INIT;
}
const std::vector<uint32_t>* BasicRanges::fetch() { // get basic ranges content
if (status() != AVAILABLE) {
BasicRanges::build(); // basic ranges initialize
}
return &BasicRanges::data; // return const ptr
}
void BasicRanges::build() { // ensure that basic ranges available
if (!BasicRanges::available) {
if (BasicRanges::building.try_lock()) { // mutex lock success
@ -46,59 +37,12 @@ void BasicRanges::build() { // ensure that basic ranges available
}
}
#include <iostream>
void BasicRanges::sort_data(std::vector<int> &flags, std::vector<uint32_t> &raw) {
struct heap_node {
uint32_t value;
int index;
int limit;
};
struct compare {
bool operator() (heap_node n1, heap_node n2) {
return n1.value > n2.value;
}
};
std::priority_queue<heap_node, std::vector<heap_node>, compare> min_heap;
for (auto i = 0; i < flags.size() - 1; ++i) {
min_heap.push({
.value = raw[flags[i]],
.index = flags[i],
.limit = flags[i + 1] - 1,
});
}
while (!min_heap.empty()) {
auto current = min_heap.top();
min_heap.pop();
data.emplace_back(current.value);
if (current.index != current.limit) {
min_heap.push({
.value = raw[current.index + 1],
.index = current.index + 1,
.limit = current.limit,
});
}
}
}
void BasicRanges::build_data() { // build basic ranges
BasicRanges::data.reserve(BASIC_RANGES_SIZE); // memory pre-allocated
std::vector<uint32_t> raw_data;
raw_data.reserve(BASIC_RANGES_SIZE);
std::vector<int> start_points;
for (int n = 0; n <= 7; ++n) { // number of 1x2 and 2x1 block -> 0 ~ 7
for (int n_2x1 = 0; n_2x1 <= n; ++n_2x1) { // number of 2x1 block -> 0 ~ n
for (int n_1x1 = 0; n_1x1 <= (14 - n * 2); ++n_1x1) { // number of 1x1 block -> 0 ~ (14 - 2n)
start_points.emplace_back(raw_data.size());
generate(raw_data, generate_t { // generate target ranges
generate(generate_t { // generate target ranges
.n1 = 16 - n * 2 - n_1x1, /// space -> 00
.n2 = n - n_2x1, /// 1x2 -> 01
.n3 = n_2x1, /// 2x1 -> 10
@ -107,47 +51,36 @@ void BasicRanges::build_data() { // build basic ranges
}
}
}
start_points.emplace_back(raw_data.size());
// std::sort(BasicRanges::data.begin(), BasicRanges::data.end()); // sort basic ranges
BasicRanges::sort_data(start_points, raw_data);
std::cout << "size: " << BasicRanges::data.size() << std::endl;
// std::sort(raw_data.begin(), raw_data.end());
// std::cout << raw_data.size() << std::endl;
// for (auto &range : BasicRanges::data) {
// range = Common::range_reverse(range); // basic ranges reverse
// }
std::sort(BasicRanges::data.begin(), BasicRanges::data.end()); // sort basic ranges
for (auto &range : BasicRanges::data) {
range = Common::range_reverse(range); // basic ranges reverse
}
}
void BasicRanges::generate(std::vector<uint32_t> &release, generate_t info) { // generate specific basic ranges
constexpr uint32_t MASK_01 = (uint32_t)0b01 << 30;
constexpr uint32_t MASK_10 = (uint32_t)0b10 << 30;
constexpr uint32_t MASK_11 = (uint32_t)0b11 << 30;
void BasicRanges::generate(generate_t info) { // generate specific basic ranges
constexpr auto MASK_01 = (uint32_t)0b01 << 30;
constexpr auto MASK_10 = (uint32_t)0b10 << 30;
constexpr auto MASK_11 = (uint32_t)0b11 << 30;
/// n4 n3 n2 n1
/// 00000000 00000000 00000000 00000000 (32-bits)
struct build_t {
uint32_t nx;
uint32_t nx; // (n4, n3, n2, n1)
uint32_t prefix;
int offset;
int offset; // prefix length
};
std::queue<build_t> cache;
cache.emplace(build_t {
cache.emplace(build_t { // setup info
.nx = static_cast<uint32_t>(info.n1 | info.n2 << 8 | info.n3 << 16 | info.n4 << 24),
.prefix = 0x00000000,
.offset = 0,
});
while (!cache.empty()) { // queue without elements
while (!cache.empty()) { // queue without elements -> work complete
auto current = cache.front();
if (!current.nx) { // both n1, n2, n3, n4 -> 0
release.emplace_back(current.prefix); // release prefix as basic range
BasicRanges::data.emplace_back(current.prefix); // release prefix as basic range
cache.pop();
continue; // skip search
}

3
src/all_cases/basic_ranges.h
View File

@ -30,6 +30,5 @@ private:
static std::vector<uint32_t> data;
static void build_data();
static void sort_data(std::vector<int> &flags, std::vector<uint32_t> &raw);
static void generate(std::vector<uint32_t> &release, generate_t info);
static void generate(generate_t info);
};

9
src/common_code/common_code.cc
View File

@ -2,6 +2,15 @@
#include "common.h"
#include "common_code.h"
inline uint32_t binary_count(uint32_t bin) { // get number of non-zero bits
bin -= (bin >> 1) & 0x55555555;
bin = (bin & 0x33333333) + ((bin >> 2) & 0x33333333);
bin = ((bin >> 4) + bin) & 0x0F0F0F0F;
bin += bin >> 8;
bin += bin >> 16;
return bin & 0b111111;
}
/// WARN: bin should not be zero
inline uint32_t last_zero_num(uint32_t bin) { // get last zero number
bin ^= (bin - 1);

4
src/main.cc
View File

@ -244,6 +244,10 @@ int main() {
// load_ranges();
BasicRanges::build();
// std::cout << "size: " << BasicRanges::fetch()->size() << std::endl;
for (const auto &range : *BasicRanges::fetch()) {
printf("%08X\n", range);
}
std::cerr << (clock() - start_time) * 1000 / CLOCKS_PER_SEC << "ms" << std::endl;
// std::cerr << (clock() - start_time) * 1000000 / CLOCKS_PER_SEC << "us" << std::endl;

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