Jade LovelaceandRebecca Turner
0cc285f87b
Fixes:
- Identifiers starting with _ are prohibited
- Some driveby header dependency cleaning which wound up with doing some
extra fixups.
- Fucking C style casts, man. C++ made these 1000% worse by letting you
also do memory corruption with them with references.
- Remove casts to Expr * where ExprBlackHole is an incomplete type by
introducing an explicitly-cast eBlackHoleAddr as Expr *.
- An incredibly illegal cast of the text bytes of the StorePath hash
into a size_t directly. You can't DO THAT.
Replaced with actually parsing the hash so we get 100% of the bits
being entropy, then memcpying the start of the hash. If this shows
up in a profile we should just make the hash parser faster with a
lookup table or something sensible like that.
- This horrendous bit of UB which I thankfully slapped a deprecation
warning on, built, and it didn't trigger anywhere so it was dead
code and I just deleted it. But holy crap you *cannot* do that.
inline void mkString(const Symbol & s)
{
mkString(((const std::string &) s).c_str());
}
- Some wrong lints. Lots of wrong macro lints, one wrong
suspicious-sizeof lint triggered by the template being instantiated
with only pointers, but the calculation being correct for both
pointers and not-pointers.
- Exceptions in destructors strike again. I tried to catch the
exceptions that might actually happen rather than all the exceptions
imaginable. We can let the runtime hard-kill it on other exceptions
imo.
Change-Id: I71761620846cba64d66ee7ca231b20c061e69710
97 lines
1.9 KiB
C++
97 lines
1.9 KiB
C++
#pragma once
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///@file
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#include <string_view>
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#include <string>
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#include "types.hh" // IWYU pragma: keep
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namespace nix {
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struct Hash;
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/**
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* \ref StorePath "Store path" is the fundamental reference type of Nix.
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* A store paths refers to a Store object.
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*
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* See glossary.html#gloss-store-path for more information on a
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* conceptual level.
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*/
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class StorePath
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{
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std::string baseName;
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public:
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/**
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* Size of the hash part of store paths, in base-32 characters.
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*/
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constexpr static size_t HashLen = 32; // i.e. 160 bits
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constexpr static size_t MaxPathLen = 211;
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StorePath() = delete;
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StorePath(std::string_view baseName);
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StorePath(const Hash & hash, std::string_view name);
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std::string_view to_string() const
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{
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return baseName;
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}
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bool operator < (const StorePath & other) const
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{
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return baseName < other.baseName;
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}
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bool operator == (const StorePath & other) const
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{
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return baseName == other.baseName;
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}
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bool operator != (const StorePath & other) const
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{
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return baseName != other.baseName;
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}
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/**
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* Check whether a file name ends with the extension for derivations.
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*/
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bool isDerivation() const;
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std::string_view name() const
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{
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return std::string_view(baseName).substr(HashLen + 1);
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}
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std::string_view hashPart() const
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{
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return std::string_view(baseName).substr(0, HashLen);
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}
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static StorePath dummy;
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static StorePath random(std::string_view name);
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};
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typedef std::set<StorePath> StorePathSet;
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typedef std::vector<StorePath> StorePaths;
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/**
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* The file extension of \ref Derivation derivations when serialized
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* into store objects.
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*/
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const std::string drvExtension = ".drv";
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}
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namespace std {
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template<> struct hash<nix::StorePath> {
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std::size_t operator()(const nix::StorePath & path) const noexcept;
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};
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}
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