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#pragma once
#include <util/generic/vector.h>
#include <util/generic/strbuf.h>
#include <util/generic/string.h>
#include <util/string/ascii.h>
//do not own any data
struct TPathSplitStore: public TVector<TStringBuf> {
TStringBuf Drive;
bool IsAbsolute = false;
void AppendComponent(const TStringBuf comp);
TStringBuf Extension() const;
protected:
TString DoReconstruct(const TStringBuf slash) const;
inline void DoAppendHint(size_t hint) {
reserve(size() + hint);
}
};
struct TPathSplitTraitsUnix: public TPathSplitStore {
static constexpr char MainPathSep = '/';
inline TString Reconstruct() const {
return DoReconstruct(TStringBuf("/"));
}
static constexpr bool IsPathSep(const char c) noexcept {
return c == '/';
}
static inline bool IsAbsolutePath(const TStringBuf path) noexcept {
return path && IsPathSep(path[0]);
}
void DoParseFirstPart(const TStringBuf part);
void DoParsePart(const TStringBuf part);
};
struct TPathSplitTraitsWindows: public TPathSplitStore {
static constexpr char MainPathSep = '\\';
inline TString Reconstruct() const {
return DoReconstruct(TStringBuf("\\"));
}
static constexpr bool IsPathSep(char c) noexcept {
return c == '/' || c == '\\';
}
static inline bool IsAbsolutePath(const TStringBuf path) noexcept {
return path && (IsPathSep(path[0]) || (path.size() > 1 && path[1] == ':' && IsAsciiAlpha(path[0]) && (path.size() == 2 || IsPathSep(path[2]))));
}
void DoParseFirstPart(const TStringBuf part);
void DoParsePart(const TStringBuf part);
};
#if defined(_unix_)
using TPathSplitTraitsLocal = TPathSplitTraitsUnix;
#else
using TPathSplitTraitsLocal = TPathSplitTraitsWindows;
#endif
template <class TTraits>
class TPathSplitBase: public TTraits {
public:
inline TPathSplitBase() = default;
inline TPathSplitBase(const TStringBuf part) {
this->ParseFirstPart(part);
}
inline TPathSplitBase& AppendHint(size_t hint) {
this->DoAppendHint(hint);
return *this;
}
inline TPathSplitBase& ParseFirstPart(const TStringBuf part) {
this->DoParseFirstPart(part);
return *this;
}
inline TPathSplitBase& ParsePart(const TStringBuf part) {
this->DoParsePart(part);
return *this;
}
template <class It>
inline TPathSplitBase& AppendMany(It b, It e) {
this->AppendHint(e - b);
while (b != e) {
this->AppendComponent(*b++);
}
return *this;
}
};
using TPathSplit = TPathSplitBase<TPathSplitTraitsLocal>;
using TPathSplitUnix = TPathSplitBase<TPathSplitTraitsUnix>;
using TPathSplitWindows = TPathSplitBase<TPathSplitTraitsWindows>;
TString JoinPaths(const TPathSplit& p1, const TPathSplit& p2);
TStringBuf CutExtension(const TStringBuf fileName Y_LIFETIME_BOUND);
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