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/usr/include/osmosdr/ranges.h is in gr-osmosdr 0.1.4-14build1.

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//
// Copyright 2010-2011 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

#ifndef INCLUDED_OSMOSDR_RANGES_H
#define INCLUDED_OSMOSDR_RANGES_H

#include <osmosdr/api.h>
#include <osmosdr/pimpl.h>
#include <string>
#include <vector>

namespace osmosdr{

    //! A wildcard motherboard index
    static const size_t ALL_MBOARDS = size_t(~0);

    //! A wildcard channel index
    static const size_t ALL_CHANS = size_t(~0);

    /*!
     * A range object describes a set of discrete values of the form:
     * y = start + step*n, where n is an integer between 0 and (stop - start)/step
     */
    class OSMOSDR_API range_t{
    public:

        /*!
         * Create a range from a single value.
         * The step size will be taken as zero.
         * \param value the only possible value in this range
         */
        range_t(double value = 0);

        /*!
         * Create a range from a full set of values.
         * A step size of zero implies infinite precision.
         * \param start the minimum value for this range
         * \param stop the maximum value for this range
         * \param step the step size for this range
         */
        range_t(double start, double stop, double step = 0);

        //! Get the start value for this range.
        double start(void) const;

        //! Get the stop value for this range.
        double stop(void) const;

        //! Get the step value for this range.
        double step(void) const;

        //! Convert this range to a printable string
        const std::string to_pp_string(void) const;

    private: OSMOSDR_PIMPL_DECL(impl) _impl;
    };

    /*!
     * A meta-range object holds a list of individual ranges.
     */
    struct OSMOSDR_API meta_range_t : std::vector<range_t>{

        //! A default constructor for an empty meta-range
        meta_range_t(void);

        /*!
         * Input iterator constructor:
         * Makes boost::assign::list_of work.
         * \param first the begin iterator
         * \param last the end iterator
         */
        template <typename InputIterator>
        meta_range_t(InputIterator first, InputIterator last):
            std::vector<range_t>(first, last){ /* NOP */ }

        /*!
         * A convenience constructor for a single range.
         * A step size of zero implies infinite precision.
         * \param start the minimum value for this range
         * \param stop the maximum value for this range
         * \param step the step size for this range
         */
        meta_range_t(double start, double stop, double step = 0);

        //! Get the overall start value for this meta-range.
        double start(void) const;

        //! Get the overall stop value for this meta-range.
        double stop(void) const;

        //! Get the overall step value for this meta-range.
        double step(void) const;

        /*!
         * Clip the target value to a possible range value.
         * \param value the value to clip to this range
         * \param clip_step if true, clip to steps as well
         * \return a value that is in one of the ranges
         */
        double clip(double value, bool clip_step = false) const;

        /*! return a vector containing all values of the range */
        std::vector<double> values() const;

        //! Convert this meta-range to a printable string
        const std::string to_pp_string(void) const;

    };

    typedef meta_range_t gain_range_t;
    typedef meta_range_t freq_range_t;

} //namespace osmosdr

#endif /* INCLUDED_OSMOSDR_RANGES_H */