45 lines
996 B
C++
45 lines
996 B
C++
#ifndef OSRM_UTIL_MMAP_TAR_HPP
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#define OSRM_UTIL_MMAP_TAR_HPP
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#include "storage/tar.hpp"
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#include "util/mmap_file.hpp"
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#include <boost/iostreams/device/mapped_file.hpp>
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#include <tuple>
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#include <unordered_map>
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namespace osrm
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{
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namespace util
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{
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using DataRange = std::pair<const char *, const char *>;
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using DataMap = std::unordered_map<std::string, DataRange>;
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inline DataMap mmapTarFile(const boost::filesystem::path &path,
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boost::iostreams::mapped_file_source ®ion)
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{
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DataMap map;
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storage::tar::FileReader reader{path, storage::tar::FileReader::VerifyFingerprint};
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std::vector<storage::tar::FileReader::FileEntry> entries;
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reader.List(std::back_inserter(entries));
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auto raw_file = mmapFile<char>(path, region);
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for (const auto &entry : entries)
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{
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auto begin = raw_file.data() + entry.offset;
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auto end = begin + entry.size;
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map[entry.name] = DataRange{begin, end};
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}
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return map;
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}
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}
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}
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#endif
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