diff options
Diffstat (limited to 'third_party/nix/src/libutil/istringstream_nocopy.hh')
-rw-r--r-- | third_party/nix/src/libutil/istringstream_nocopy.hh | 116 |
1 files changed, 53 insertions, 63 deletions
diff --git a/third_party/nix/src/libutil/istringstream_nocopy.hh b/third_party/nix/src/libutil/istringstream_nocopy.hh index f7beac578e39..997965630b6c 100644 --- a/third_party/nix/src/libutil/istringstream_nocopy.hh +++ b/third_party/nix/src/libutil/istringstream_nocopy.hh @@ -5,88 +5,78 @@ #pragma once -#include <string> #include <iostream> +#include <string> -template <class CharT, class Traits = std::char_traits<CharT>, class Allocator = std::allocator<CharT>> -class basic_istringbuf_nocopy : public std::basic_streambuf<CharT, Traits> -{ -public: - typedef std::basic_string<CharT, Traits, Allocator> string_type; +template <class CharT, class Traits = std::char_traits<CharT>, + class Allocator = std::allocator<CharT>> +class basic_istringbuf_nocopy : public std::basic_streambuf<CharT, Traits> { + public: + typedef std::basic_string<CharT, Traits, Allocator> string_type; - typedef typename std::basic_streambuf<CharT, Traits>::off_type off_type; + typedef typename std::basic_streambuf<CharT, Traits>::off_type off_type; - typedef typename std::basic_streambuf<CharT, Traits>::pos_type pos_type; + typedef typename std::basic_streambuf<CharT, Traits>::pos_type pos_type; - typedef typename std::basic_streambuf<CharT, Traits>::int_type int_type; + typedef typename std::basic_streambuf<CharT, Traits>::int_type int_type; - typedef typename std::basic_streambuf<CharT, Traits>::traits_type traits_type; + typedef typename std::basic_streambuf<CharT, Traits>::traits_type traits_type; -private: - const string_type & s; + private: + const string_type& s; - off_type off; + off_type off; -public: - basic_istringbuf_nocopy(const string_type & s) : s{s}, off{0} - { - } - -private: - pos_type seekoff(off_type off, std::ios_base::seekdir dir, std::ios_base::openmode which) - { - if (which & std::ios_base::in) { - this->off = dir == std::ios_base::beg - ? off - : (dir == std::ios_base::end - ? s.size() + off - : this->off + off); - } - return pos_type(this->off); - } + public: + basic_istringbuf_nocopy(const string_type& s) : s{s}, off{0} {} - pos_type seekpos(pos_type pos, std::ios_base::openmode which) - { - return seekoff(pos, std::ios_base::beg, which); + private: + pos_type seekoff(off_type off, std::ios_base::seekdir dir, + std::ios_base::openmode which) { + if (which & std::ios_base::in) { + this->off = + dir == std::ios_base::beg + ? off + : (dir == std::ios_base::end ? s.size() + off : this->off + off); } + return pos_type(this->off); + } - std::streamsize showmanyc() - { - return s.size() - off; - } + pos_type seekpos(pos_type pos, std::ios_base::openmode which) { + return seekoff(pos, std::ios_base::beg, which); + } - int_type underflow() - { - if (typename string_type::size_type(off) == s.size()) - return traits_type::eof(); - return traits_type::to_int_type(s[off]); - } + std::streamsize showmanyc() { return s.size() - off; } - int_type uflow() - { - if (typename string_type::size_type(off) == s.size()) - return traits_type::eof(); - return traits_type::to_int_type(s[off++]); - } + int_type underflow() { + if (typename string_type::size_type(off) == s.size()) + return traits_type::eof(); + return traits_type::to_int_type(s[off]); + } - int_type pbackfail(int_type ch) - { - if (off == 0 || (ch != traits_type::eof() && ch != s[off - 1])) - return traits_type::eof(); + int_type uflow() { + if (typename string_type::size_type(off) == s.size()) + return traits_type::eof(); + return traits_type::to_int_type(s[off++]); + } - return traits_type::to_int_type(s[--off]); - } + int_type pbackfail(int_type ch) { + if (off == 0 || (ch != traits_type::eof() && ch != s[off - 1])) + return traits_type::eof(); + return traits_type::to_int_type(s[--off]); + } }; -template <class CharT, class Traits = std::char_traits<CharT>, class Allocator = std::allocator<CharT>> -class basic_istringstream_nocopy : public std::basic_iostream<CharT, Traits> -{ - typedef basic_istringbuf_nocopy<CharT, Traits, Allocator> buf_type; - buf_type buf; -public: - basic_istringstream_nocopy(const typename buf_type::string_type & s) : - std::basic_iostream<CharT, Traits>(&buf), buf(s) {}; +template <class CharT, class Traits = std::char_traits<CharT>, + class Allocator = std::allocator<CharT>> +class basic_istringstream_nocopy : public std::basic_iostream<CharT, Traits> { + typedef basic_istringbuf_nocopy<CharT, Traits, Allocator> buf_type; + buf_type buf; + + public: + basic_istringstream_nocopy(const typename buf_type::string_type& s) + : std::basic_iostream<CharT, Traits>(&buf), buf(s){}; }; typedef basic_istringstream_nocopy<char> istringstream_nocopy; |