84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
#pragma once
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#include "xcdat/bc_vector_7.hpp"
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#include "xcdat/bc_vector_8.hpp"
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#include "xcdat/load_visitor.hpp"
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#include "xcdat/mmap_visitor.hpp"
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#include "xcdat/save_visitor.hpp"
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#include "xcdat/size_visitor.hpp"
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#include "xcdat/trie.hpp"
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namespace xcdat {
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using trie_7_type = trie<bc_vector_7>;
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using trie_8_type = trie<bc_vector_8>;
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//! Map the memory to the trie index.
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template <class Trie>
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[[maybe_unused]] Trie mmap(const char* address) {
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mmap_visitor visitor(address);
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std::uint32_t flag;
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visitor.visit(flag);
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XCDAT_THROW_IF(flag != Trie::l1_bits, "The input index type is different.");
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Trie idx;
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visitor.visit(idx);
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return idx;
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}
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//! Load the trie index from the file.
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template <class Trie>
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[[maybe_unused]] Trie load(std::string_view filepath) {
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load_visitor visitor(filepath);
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std::uint32_t flag;
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visitor.visit(flag);
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XCDAT_THROW_IF(flag != Trie::l1_bits, "The input index type is different.");
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Trie idx;
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visitor.visit(idx);
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return idx;
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}
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//! Save the trie index into the file, and returns the file size in bytes.
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template <class Trie>
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[[maybe_unused]] std::uint64_t save(const Trie& idx, std::string_view filepath) {
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save_visitor visitor(filepath);
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visitor.visit(static_cast<std::uint32_t>(Trie::l1_bits)); // flag
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visitor.visit(const_cast<Trie&>(idx));
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return visitor.bytes();
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}
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//! Get the index size in bytes.
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template <class Trie>
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[[maybe_unused]] std::uint64_t memory_in_bytes(const Trie& idx) {
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size_visitor visitor;
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visitor.visit(static_cast<std::uint32_t>(Trie::l1_bits)); // flag
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visitor.visit(const_cast<Trie&>(idx));
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return visitor.bytes();
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}
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[[maybe_unused]] std::uint32_t get_flag(std::string_view filepath) {
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std::ifstream ifs(filepath);
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XCDAT_THROW_IF(!ifs.good(), "Cannot open the input file");
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std::uint32_t flag;
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ifs.read(reinterpret_cast<char*>(&flag), sizeof(flag));
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return flag;
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}
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[[maybe_unused]] std::vector<std::string> load_strings(std::string_view filepath) {
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std::ifstream ifs(filepath);
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if (!ifs) {
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return {};
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}
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std::vector<std::string> strs;
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for (std::string str; std::getline(ifs, str);) {
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strs.push_back(str);
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}
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return strs;
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}
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} // namespace xcdat
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