// Copyright (C) 1999-2005 Open Source Telecom Corporation.
// Copyright (C) 2006-2010 David Sugar, Tycho Softworks
//
// 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 2 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, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
//
// This exception applies only to the code released under the name GNU
// Common C++.  If you copy code from other releases into a copy of GNU
// Common C++, as the General Public License permits, the exception does
// not apply to the code that you add in this way.  To avoid misleading
// anyone as to the status of such modified files, you must delete
// this exception notice from them.
//
// If you write modifications of your own for GNU Common C++, it is your choice
// whether to permit this exception to apply to your modifications.
// If you do not wish that, delete this exception notice.
//

#include <cc++/config.h>
#include <cc++/string.h>
#include <cc++/thread.h>
#include <cc++/export.h>
#include <cc++/numbers.h>
#include <cstdlib>

#ifdef  CCXX_NAMESPACES
namespace ost {
#endif

Number::Number(char *buf, unsigned width)
{
    if(width > 10)
        width = 10;
    if(width < 1)
        width = 1;
    size = width;

    buffer = buf;
}

long Number::getValue(void) const
{
    int count = size;
    bool sign = false;
    long ret = 0;
    char *bp = buffer;

    if(*bp == '-') {
        --count;
        ++bp;
        sign = true;
    }
    else if(*bp == '+') {
        --count;
        ++bp;
    }
    while(count && *bp >='0' && *bp <='9') {
        ret = ret * 10l + (*bp - '0');
        --count;
        ++bp;
    }

    if(sign)
        ret = -ret;
    return ret;
}

void Number::setValue(long value)
{
    int count = size;
    char *bp = buffer;
    long max = 1;
    int exp;
    bool z = false;

    if(value < 0) {
        value = -value;
        --count;
        *(bp++) = '-';
    }

    exp = count;
    while(--exp)
        max *= 10;

    while(max) {
        if(value >= max || z) {
            --count;
            *(bp++) = '0' + ((char)(value / max));
        }
        if(value >= max) {
            z = true;
            value -= (value / max) * max;
        }
        max /= 10;
    }
    while(count-- && *bp >= '0' && *bp <='9')
        *(bp++) = ' ';
}

long Number::operator=(long value)
{
    setValue(value);
    return value;
}

long Number::operator+=(const long value)
{
    long value1 = getValue() + value;
    setValue(value1);
    return value1;
}

long Number::operator-=(const long value)
{
    long value1 = getValue() - value;
    setValue(value1);
    return value1;
}

long Number::operator--()
{
    long val = getValue();
    setValue(--val);
    return val;
}

long Number::operator++()
{
    long val = getValue();
    setValue(++val);
    return val;
}

int Number::operator==(const Number &num)
{
    return getValue() == num.getValue();
}

int Number::operator!=(const Number &num)
{
    return getValue() != num.getValue();
}

int Number::operator<(const Number &num)
{
    return getValue() < num.getValue();
}

int Number::operator<=(const Number &num)
{
    return getValue() <= num.getValue();
}

int Number::operator>(const Number &num)
{
    return getValue() > num.getValue();
}

int Number::operator>=(const Number &num)
{
    return getValue() >= num.getValue();
}

ZNumber::ZNumber(char *buf, unsigned chars) :
Number(buf, chars)
{}

void ZNumber::setValue(long value)
{
    int count = size;
    char *bp = buffer;
    long max = 1;
    int exp;

    if(value < 0) {
        value = -value;
        --count;
        *(bp++) = '-';
    }

    exp = count;
    while(--exp)
        max *= 10;

    while(max) {
        --count;
        *(bp++) = '0' + (char)(value / max);
        value -= (value / max) * max;
        max /= 10;
    }
}

long ZNumber::operator=(long value)
{
    setValue(value);
    return value;
}

long operator+(const Number &num, long val)
{
    return num.getValue() + val;
}

long operator+(long val, const Number &num)
{
    return num.getValue() + val;
}

long operator-(const Number &num, long val)
{
    return num.getValue() - val;
}

long operator-(long val, const Number &num)
{
    return num.getValue() - val;
}

#ifdef  CCXX_NAMESPACES
}
#endif