references.hh

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#pragma once
 
#include "lix/libutil/hash.hh"
 
namespace nix {
 
class RefScanSink : public Sink
{
    StringSet hashes;
    StringSet seen;
 
    std::string tail;
 
public:
 
    RefScanSink(StringSet && hashes) : hashes(hashes)
    { }
 
    StringSet & getResult()
    { return seen; }
 
    void operator () (std::string_view data) override;
};
 
struct RewritingSource : Source
{
    const std::string::size_type maxRewriteSize;
    const std::string initials;
    const StringMap rewrites;
    std::string rewritten, buffered;
    std::string_view unreturned;
    Source * inner;
 
    static constexpr struct may_change_size_t {
        explicit may_change_size_t() = default;
    } may_change_size{};
 
    RewritingSource(const std::string & from, const std::string & to, Source & inner);
    RewritingSource(StringMap rewrites, Source & inner);
    RewritingSource(may_change_size_t, StringMap rewrites, Source & inner);
 
    size_t read(char * data, size_t len) override;
};
 
HashResult computeHashModulo(HashType ht, const std::string & modulus, Source & source);
 
}