mirror of
https://github.com/jezhiggins/arabica
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71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
#ifndef ARABICA_BASE64_CODECVT_H
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#define ARABICA_BASE64_CODECVT_H
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///////////////////////////////////////////
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//
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// $Id$
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//
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///////////////////////////////////////////
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#include <locale>
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class base64codecvt : public std::codecvt<char, char, std::char_traits<char>::state_type>
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{
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public:
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typedef std::char_traits<char>::state_type state_t;
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protected:
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virtual ~base64codecvt() { }
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virtual result do_out(state_t& state,
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const char* from,
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const char* from_end,
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const char*& from_next,
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char* to,
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char* to_limit,
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char*& to_next) const;
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virtual result do_in(state_t& state,
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const char* from,
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const char* from_end,
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const char*& from_next,
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char* to,
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char* to_limit,
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char*& to_next) const;
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virtual result do_unshift(state_t& state,
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char* to,
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char* to_limit,
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char*& to_next) const;
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virtual int do_encoding() const throw() { return -1; }
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virtual bool do_always_noconv() const throw() { return false; }
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virtual int do_length(const state_t&,
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const char* from,
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const char* end,
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size_t max) const;
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virtual int do_max_length() const throw();
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private:
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// state here is a little tricky - we need the previous char and
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// the state counter, and in some case we need to "pad" the input
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// strings. I use these helper functions to mungle them
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// together and keep the details neater (or try to anyway)
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mutable state_t* state_;
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mutable const char** from_next_;
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mutable const char** from_end_;
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void grabState(state_t& state) const { state_ = &state; }
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void grabFromNext(const char*& from_next) const { from_next_ = &from_next; }
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void grabFromEnd(const char*& from_end) const { from_end_ = &from_end; }
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int getState() const;
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void nextState() const;
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int getCurrentOutChar() const;
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void consumeOutChar() const;
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char getPreviousChar() const;
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void setPreviousChar(char c) const;
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}; // class base64codecvt
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#endif
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