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// Copyright (C) 1999-2005 Open Source Telecom Corporation.
// Copyright (C) 2006-2014 David Sugar, Tycho Softworks.
// Copyright (C) 2015-2020 Cherokees of Idaho.
//
// This file is part of GNU uCommon C++.
//
// GNU uCommon C++ is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU uCommon C++ 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with GNU uCommon C++. If not, see <http://www.gnu.org/licenses/>.
#include <ucommon-config.h>
#include <ucommon/export.h>
#include <ucommon/numbers.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
namespace ucommon {
Number::Number(char *buf, unsigned width)
{
if(width > 10)
width = 10;
if(width < 1)
width = 1;
size = width;
buffer = buf;
}
long Number::get(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::set(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)
{
set(value);
return value;
}
long Number::operator=(const Number& num)
{
set(num.get());
return get();
}
long Number::operator+=(long value)
{
long value1 = get() + value;
set(value1);
return value1;
}
long Number::operator-=(long value)
{
long value1 = get() - value;
set(value1);
return value1;
}
long Number::operator--()
{
long val = get();
set(--val);
return val;
}
long Number::operator++()
{
long val = get();
set(++val);
return val;
}
ZNumber::ZNumber(char *buf, unsigned chars) :
Number(buf, chars)
{}
void ZNumber::set(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)
{
set(value);
return value;
}
} // namespace ucommon
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