mirror of
https://github.com/matrix-construct/construct
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ircd: Add std::chrono lex_cast; cleanup lex_cast buffer argument related.
This commit is contained in:
Jason Volk
parent
0be93870ea
commit
cdcd2e2fb9
2 changed files with 155 additions and 78 deletions
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@ -38,7 +38,7 @@ namespace ircd
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template<class T> T lex_cast(const string_view &);
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// User supplied destination buffer
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template<class T> string_view lex_cast(T, char *const &buf, const size_t &max);
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template<class T> string_view lex_cast(T, const mutable_buffer &buf);
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// Circular static thread_local buffer
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const size_t LEX_CAST_BUFS {256}; // plenty
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@ -77,6 +77,10 @@ namespace ircd
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template<> bool try_lex_cast<uint8_t>(const string_view &);
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template<> bool try_lex_cast<int8_t>(const string_view &);
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template<> bool try_lex_cast<bool>(const string_view &);
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template<> bool try_lex_cast<seconds>(const string_view &);
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template<> bool try_lex_cast<milliseconds>(const string_view &);
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template<> bool try_lex_cast<microseconds>(const string_view &);
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template<> bool try_lex_cast<nanoseconds>(const string_view &);
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template<> std::string &lex_cast(std::string &); // trivial
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template<> std::string lex_cast(const std::string &); // trivial
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@ -93,21 +97,29 @@ namespace ircd
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template<> uint8_t lex_cast(const string_view &);
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template<> int8_t lex_cast(const string_view &);
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template<> bool lex_cast(const string_view &);
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template<> seconds lex_cast(const string_view &);
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template<> milliseconds lex_cast(const string_view &);
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template<> microseconds lex_cast(const string_view &);
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template<> nanoseconds lex_cast(const string_view &);
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template<> string_view lex_cast(const std::string &, char *const &buf, const size_t &max);
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template<> string_view lex_cast(const std::string_view &, char *const &buf, const size_t &max);
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template<> string_view lex_cast(const string_view &, char *const &buf, const size_t &max);
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template<> string_view lex_cast(long double, char *const &buf, const size_t &max);
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template<> string_view lex_cast(double, char *const &buf, const size_t &max);
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template<> string_view lex_cast(ulong, char *const &buf, const size_t &max);
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template<> string_view lex_cast(long, char *const &buf, const size_t &max);
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template<> string_view lex_cast(uint, char *const &buf, const size_t &max);
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template<> string_view lex_cast(int, char *const &buf, const size_t &max);
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template<> string_view lex_cast(ushort, char *const &buf, const size_t &max);
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template<> string_view lex_cast(short, char *const &buf, const size_t &max);
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template<> string_view lex_cast(uint8_t, char *const &buf, const size_t &max);
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template<> string_view lex_cast(int8_t, char *const &buf, const size_t &max);
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template<> string_view lex_cast(bool, char *const &buf, const size_t &max);
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template<> string_view lex_cast(const std::string &, const mutable_buffer &buf);
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template<> string_view lex_cast(const std::string_view &, const mutable_buffer &buf);
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template<> string_view lex_cast(const string_view &, const mutable_buffer &buf);
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template<> string_view lex_cast(seconds, const mutable_buffer &buf);
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template<> string_view lex_cast(milliseconds, const mutable_buffer &buf);
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template<> string_view lex_cast(microseconds, const mutable_buffer &buf);
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template<> string_view lex_cast(nanoseconds, const mutable_buffer &buf);
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template<> string_view lex_cast(long double, const mutable_buffer &buf);
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template<> string_view lex_cast(double, const mutable_buffer &buf);
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template<> string_view lex_cast(ulong, const mutable_buffer &buf);
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template<> string_view lex_cast(long, const mutable_buffer &buf);
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template<> string_view lex_cast(uint, const mutable_buffer &buf);
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template<> string_view lex_cast(int, const mutable_buffer &buf);
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template<> string_view lex_cast(ushort, const mutable_buffer &buf);
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template<> string_view lex_cast(short, const mutable_buffer &buf);
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template<> string_view lex_cast(uint8_t, const mutable_buffer &buf);
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template<> string_view lex_cast(int8_t, const mutable_buffer &buf);
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template<> string_view lex_cast(bool, const mutable_buffer &buf);
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}
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/// Convert a native number to a string. The returned value is a view of the
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@ -117,7 +129,7 @@ template<class T>
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ircd::string_view
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ircd::lex_cast(const T &t)
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{
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return lex_cast<T>(t, nullptr, 0);
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return lex_cast<T>(t, null_buffer);
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}
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/// Conversion to an std::string creates a copy when the input is a
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@ -192,11 +204,10 @@ template<>
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__attribute__((warning("unnecessary lexical cast")))
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inline ircd::string_view
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ircd::lex_cast(const string_view &s,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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s.copy(buf, max);
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return { buf, max };
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s.copy(data(buf), size(buf));
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return { data(buf), s.size() };
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}
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/// Specialization of a string to string conversion to user's buffer;
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@ -206,11 +217,10 @@ template<>
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__attribute__((warning("unnecessary lexical cast")))
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inline ircd::string_view
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ircd::lex_cast(const std::string_view &s,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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s.copy(buf, max);
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return { buf, max };
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s.copy(data(buf), size(buf));
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return { data(buf), s.size() };
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}
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/// Specialization of a string to string conversion to user's buffer;
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@ -220,11 +230,10 @@ template<>
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__attribute__((warning("unnecessary lexical cast")))
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inline ircd::string_view
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ircd::lex_cast(const std::string &s,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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s.copy(buf, max);
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return { buf, max };
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s.copy(data(buf), size(buf));
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return { data(buf), s.size() };
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}
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/// Template basis; if no specialization is matched there is no fallback here
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@ -232,8 +241,7 @@ template<class T>
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__attribute__((error("unsupported lexical cast")))
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ircd::string_view
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ircd::lex_cast(T t,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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assert(0);
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return {};
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165
ircd/lexical.cc
165
ircd/lexical.cc
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@ -161,23 +161,21 @@ ircd::token_count(const string_view &str,
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size_t
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ircd::tokens(const string_view &str,
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const char &sep,
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char *const &buf,
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const size_t &max,
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const mutable_buffer &buf,
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const token_view &closure)
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{
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const char ssep[2] { sep, '\0' };
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return tokens(str, ssep, buf, max, closure);
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return tokens(str, ssep, buf, closure);
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}
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size_t
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ircd::tokens(const string_view &str,
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const char *const &sep,
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char *const &buf,
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const size_t &max,
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const mutable_buffer &buf,
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const token_view &closure)
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{
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char *ptr(buf);
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char *const stop(buf + max);
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char *ptr(data(buf));
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char *const stop(data(buf) + size(buf));
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tokens(str, sep, [&closure, &ptr, &stop]
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(const string_view &token)
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{
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@ -191,7 +189,7 @@ ircd::tokens(const string_view &str,
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closure(string_view(dest, token.size()));
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});
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return std::distance(buf, ptr);
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return std::distance(data(buf), ptr);
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}
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size_t
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@ -266,7 +264,7 @@ namespace ircd
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thread_local char lex_cast_buf[LEX_CAST_BUFS][LEX_CAST_BUFSIZE];
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thread_local uint lex_cast_cur;
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template<size_t N, class T> static string_view _lex_cast(const T &i, char *buf, size_t max);
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template<size_t N, class T> static string_view _lex_cast(const T &i, mutable_buffer buf);
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template<class T> static T _lex_cast(const string_view &s);
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}
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@ -276,8 +274,7 @@ template<size_t N,
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class T>
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ircd::string_view
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ircd::_lex_cast(const T &i,
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char *buf,
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size_t max)
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mutable_buffer buf)
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try
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{
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using array = std::array<char, N>;
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@ -285,14 +282,13 @@ try
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if(!buf)
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{
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buf = lex_cast_buf[lex_cast_cur++];
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max = LEX_CAST_BUFSIZE;
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lex_cast_cur %= LEX_CAST_BUFS;
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}
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assert(max >= N);
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auto &a(*reinterpret_cast<array *>(buf));
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assert(size(buf) >= N);
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auto &a(*reinterpret_cast<array *>(data(buf)));
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a = boost::lexical_cast<array>(i);
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return { buf, strnlen(buf, max) };
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return { data(buf), strnlen(data(buf), size(buf)) };
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}
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catch(const boost::bad_lexical_cast &e)
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{
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@ -315,101 +311,122 @@ catch(const boost::bad_lexical_cast &e)
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template<> ircd::string_view
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ircd::lex_cast(bool i,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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static const size_t MAX(8);
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return _lex_cast<MAX>(i, buf, max);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(int8_t i,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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static const size_t MAX(8);
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return _lex_cast<MAX>(i, buf, max);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(uint8_t i,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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static const size_t MAX(8);
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return _lex_cast<MAX>(i, buf, max);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(short i,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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static const size_t MAX(8);
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return _lex_cast<MAX>(i, buf, max);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(ushort i,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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static const size_t MAX(8);
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return _lex_cast<MAX>(i, buf, max);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(int i,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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static const size_t MAX(16);
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return _lex_cast<MAX>(i, buf, max);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(uint i,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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static const size_t MAX(16);
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return _lex_cast<MAX>(i, buf, max);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(long i,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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static const size_t MAX(32);
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return _lex_cast<MAX>(i, buf, max);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(ulong i,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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static const size_t MAX(32);
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return _lex_cast<MAX>(i, buf, max);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(double i,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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static const size_t MAX(64);
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return _lex_cast<MAX>(i, buf, max);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(long double i,
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char *const &buf,
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const size_t &max)
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const mutable_buffer &buf)
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{
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static const size_t MAX(64);
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return _lex_cast<MAX>(i, buf, max);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(nanoseconds i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(64);
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return _lex_cast<MAX>(i.count(), buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(microseconds i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(64);
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return _lex_cast<MAX>(i.count(), buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(milliseconds i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(64);
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return _lex_cast<MAX>(i.count(), buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(seconds i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(64);
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return _lex_cast<MAX>(i.count(), buf);
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}
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template<> bool
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@ -480,6 +497,30 @@ ircd::lex_cast(const string_view &s)
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return _lex_cast<long double>(s);
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}
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template<> ircd::nanoseconds
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ircd::lex_cast(const string_view &s)
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{
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return std::chrono::duration<time_t, std::ratio<1L, 1000000000L>>(_lex_cast<time_t>(s));
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}
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template<> ircd::microseconds
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ircd::lex_cast(const string_view &s)
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{
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return std::chrono::duration<time_t, std::ratio<1L, 1000000L>>(_lex_cast<time_t>(s));
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}
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template<> ircd::milliseconds
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ircd::lex_cast(const string_view &s)
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{
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return std::chrono::duration<time_t, std::ratio<1L, 1000L>>(_lex_cast<time_t>(s));
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}
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template<> ircd::seconds
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ircd::lex_cast(const string_view &s)
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{
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return std::chrono::duration<time_t, std::ratio<1L, 1L>>(_lex_cast<time_t>(s));
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}
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template<> bool
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ircd::try_lex_cast<bool>(const string_view &s)
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{
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@ -557,6 +598,34 @@ ircd::try_lex_cast<long double>(const string_view &s)
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return boost::conversion::try_lexical_convert(s, i);
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}
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template<> bool
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ircd::try_lex_cast<ircd::nanoseconds>(const string_view &s)
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{
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time_t i; //TODO: XXX
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return boost::conversion::try_lexical_convert(s, i);
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}
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template<> bool
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ircd::try_lex_cast<ircd::microseconds>(const string_view &s)
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{
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time_t i; //TODO: XXX
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return boost::conversion::try_lexical_convert(s, i);
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}
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template<> bool
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ircd::try_lex_cast<ircd::milliseconds>(const string_view &s)
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{
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time_t i; //TODO: XXX
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return boost::conversion::try_lexical_convert(s, i);
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}
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template<> bool
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ircd::try_lex_cast<ircd::seconds>(const string_view &s)
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{
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time_t i; //TODO: XXX
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return boost::conversion::try_lexical_convert(s, i);
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// ircd/stringops.h
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