oct-string.h

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/*
Copyright (C) 2016-2017 Carnë Draug

This file is part of Octave.

Octave 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.

Octave 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 Octave; see the file COPYING.  If not, see
<http://www.gnu.org/licenses/>.

*/

#if ! defined (octave_oct_string_h)
#define octave_oct_string_h 1

#include "octave-config.h"

namespace octave
{
  //! Octave string utility functions.
  /*!
      This functions provide a C++ interface to most string functions
      available in the Octave interpreter.

      Specializations for Array may consider its dimensions in addition
      to the actual string contents.

      @attention
      Octave's string comparison functions return true when strings are
      are equal, just the opposite of the corresponding C library functions.
      In addition, Octave's function only return bool and do not check
      lexicographical order.
  */
  namespace string
  {
    //! True if strings are the same.
    /*!
        ## Specialization for Array<char>

        When comparing whole Array of chars, the actual Array dimensions
        are significant.  A column vector and row vector with the same
        char array, will still return false.
    */
    template <typename T>
    bool strcmp (const T& str_a, const T& str_b);

    //! True if string is the same as character sequence.
    /*!
        Compares a string to the null-terminated character sequence
        beginning at the character pointed to by str_b.

        ## Specialization for Array<char>

        For purposes of comparison of dimensions, the character sequence
        is considered to be a row vector.
    */
    template <typename T>
    bool strcmp (const T& str_a, const typename T::value_type* str_b);

    //! True if strings are the same, ignoring case.
    /*!
        ## Specialization for Array<char>

        When comparing whole Array of chars, the actual Array dimensions
        are significant.  A column vector and row vector with the same
        char array, will still return false.
    */
    template <typename T>
    bool strcmpi (const T& str_a, const T& str_b);

    //! True if string is the same as character sequence, ignoring case.
    /*!
        ## Specialization for Array<char>

        For purposes of comparison of dimensions, the character sequence
        is considered to be a row vector.
    */
    template <typename T>
    bool strcmpi (const T& str_a, const typename T::value_type* str_b);

    //! True if the first N characters are the same.
    /*!
        ## Specialization for Array<char>

        The comparison is done in the first N characters, the actual
        dimensions of the Array are irrelevant.  A row vector and
        a column vector of the same still return true.
    */
    template <typename T>
    bool strncmp (const T& str_a, const T& str_b,
                  const typename T::size_type n);

    //! True if the first N characters are the same.
    template <typename T>
    bool strncmp (const T& str_a, const typename T::value_type* str_b,
                  const typename T::size_type n);

    //! True if the first N characters are the same, ignoring case.
    /*!
        ## Specialization for Array<char>

        The comparison is done in the first N characters, the actual
        dimensions of the Array are irrelevant.  A row vector and
        a column vector of the same still return true.
    */
    template <typename T>
    bool strncmpi (const T& str_a, const T& str_b,
                   const typename T::size_type n);

    //! True if the first N characters are the same, ignoring case.
    template <typename T>
    bool strncmpi (const T& str_a, const typename T::value_type* str_b,
                   const typename T::size_type n);
  }
}

#endif