diff options
Diffstat (limited to 'ml/dlib/dlib/bit_stream/bit_stream_kernel_abstract.h')
| -rw-r--r-- | ml/dlib/dlib/bit_stream/bit_stream_kernel_abstract.h | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/ml/dlib/dlib/bit_stream/bit_stream_kernel_abstract.h b/ml/dlib/dlib/bit_stream/bit_stream_kernel_abstract.h new file mode 100644 index 000000000..00c2ae3b9 --- /dev/null +++ b/ml/dlib/dlib/bit_stream/bit_stream_kernel_abstract.h @@ -0,0 +1,185 @@ +// Copyright (C) 2003 Davis E. King (davis@dlib.net) +// License: Boost Software License See LICENSE.txt for the full license. +#undef DLIB_BIT_STREAM_KERNEl_ABSTRACT_ +#ifdef DLIB_BIT_STREAM_KERNEl_ABSTRACT_ + +#include <iosfwd> + +namespace dlib +{ + + class bit_stream + { + + /*! + INITIAL VALUE + is_in_write_mode() == false + is_in_read_mode() == false + + WHAT THIS OBJECT REPRESENTS + this object is a middle man between a user and the iostream classes. + it allows single bits to be read/written easily to/from + the iostream classes + + BUFFERING: + This object will only read/write single bytes at a time from/to the + iostream objects. Any buffered bits still in the bit_stream object + when it is closed or destructed are lost if it is in read mode. If + it is in write mode then any remaining bits are guaranteed to be + written to the output stream by the time it is closed or destructed. + !*/ + + + public: + + bit_stream ( + ); + /*! + ensures + - #*this is properly initialized + throws + - std::bad_alloc + !*/ + + virtual ~bit_stream ( + ); + /*! + ensures + - all memory associated with *this has been released + !*/ + + void clear ( + ); + /*! + ensures + - #*this has its initial value + throws + - std::bad_alloc + if this exception is thrown then *this is unusable + until clear() is called and succeeds + !*/ + + + void set_input_stream ( + std::istream& is + ); + /*! + requires + - is_in_write_mode() == false + - is_in_read_mode() == false + - is is ready to give input + ensures + - #is_in_write_mode() == false + - #is_in_read_mode() == true + - #*this will now be reading from is + throws + - std::bad_alloc + !*/ + + void set_output_stream ( + std::ostream& os + ); + /*! + requires + - is_in_write_mode() == false + - is_in_read_mode() == false + - os is ready to take output + ensures + - #is_in_write_mode() == true + - #is_in_read_mode() == false + - #*this will now write to os + throws + - std::bad_alloc + !*/ + + + + void close ( + ); + /*! + requires + - is_in_write_mode() == true || is_in_read_mode() == true + ensures + - #is_in_write_mode() == false + - #is_in_read_mode() == false + !*/ + + bool is_in_write_mode ( + ) const; + /*! + ensures + - returns true if *this is associated with an output stream object + - returns false otherwise + !*/ + + bool is_in_read_mode ( + ) const; + /*! + ensures + - returns true if *this is associated with an input stream object + - returns false otherwise + !*/ + + void write ( + int bit + ); + /*! + requires + - is_in_write_mode() == true + - bit == 0 || bit == 1 + ensures + - bit will be written to the ostream object associated with *this + throws + - std::ios_base::failure + if (there was a problem writing to the output stream) then + this exception will be thrown. #*this will be unusable until + clear() is called and succeeds + - any other exception + if this exception is thrown then #*this is unusable + until clear() is called and succeeds + !*/ + + bool read ( + int& bit + ); + /*! + requires + - is_in_read_mode() == true + ensures + - the next bit has been read and placed into #bit + - returns true if the read was successful, else false + (ex. false if EOF has been reached) + throws + - any exception + if this exception is thrown then #*this is unusable + until clear() is called and succeeds + !*/ + + void swap ( + bit_stream& item + ); + /*! + ensures + - swaps *this and item + !*/ + + private: + + // restricted functions + bit_stream(bit_stream&); // copy constructor + bit_stream& operator=(bit_stream&); // assignment operator + + }; + + inline void swap ( + bit_stream& a, + bit_stream& b + ) { a.swap(b); } + /*! + provides a global swap function + !*/ + +} + +#endif // DLIB_BIT_STREAM_KERNEl_ABSTRACT_ + |