GitHash.h

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#ifndef GITHASH_H
#define GITHASH_H
 
#include <stdint.h>
#include <string>
 
static constexpr int GIT_ID_LENGTH = 40;
 
class GitHash {
private:
    bool valid_ = false;
    uint8_t id_[GIT_ID_LENGTH / 2];
    template <typename VIEW> void _assign(VIEW const &id);
public:
    GitHash();
    explicit GitHash(std::string_view const &id);
    explicit GitHash(char const *id);
    void assign(std::string_view const &id);
    std::string toString(int maxlen = -1) const;
    bool isValid() const;
    int compare(GitHash const &other) const;
    explicit operator bool () const;
    operator std::string() const
    {
        return toString();
    }
    size_t _std_hash() const;
 
    static bool isValidID(std::string const &id);
 
    static bool isValidID(GitHash const &id)
    {
        return id.isValid();
    }
};
 
static inline bool operator == (GitHash const &l, GitHash const &r)
{
    return l.compare(r) == 0;
}
 
static inline bool operator != (GitHash const &l, GitHash const &r)
{
    return l.compare(r) != 0;
}
 
static inline bool operator < (GitHash const &l, GitHash const &r)
{
    return l.compare(r) < 0;
}
 
#endif // GITHASH_H