File content as of revision 0:f2039204c8f6:

/*
 /* Copyright (C) 2013 gsfan, MIT License
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
 * and associated documentation files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or
 * substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
/* Copyright (C) 2014 Wiznet, MIT License
 *  port to the Wiznet Module WizFi250
 */

#include "WizFi250.h"

int WizFi250::x2i(char c)
{
    if ( c >= '0' && c <= '9')
    {
        return c - '0';
    }
    else if ( c >= 'A' && c <= 'F')
    {
        return c - 'A' + 10;
    }
    else if ( c >= 'a' && c <= 'f')
    {
        return c - 'a' + 10;
    }

    return 0;
}

int WizFi250::i2x(int i)
{
    if ( i >= 0 && i <= 9 )
    {
        return i + '0';
    }
    else if ( i >= 10 && i <= 15 )
    {
        return i - 10 + 'A';
    }

    return 0;
}