d07 ajouts tests avec fixed et char dans ex01 et ex02

d07/ex02/Fixed.cpp

@@ -0,0 +1,225 @@
+#include "Fixed.hpp"
+
+/*
+ * functions to print numbers in binary
+ * for the float, found help from stackoverflow :
+ * https://stackoverflow.com/questions/474007/floating-point-to-binary-valuec
+ */
+
+std::string printBitsInt(int num)
+{
+	int i = 0;
+
+	for (unsigned int mask = 1U << (sizeof(int) *8 -1); mask; mask >>= 1)
+	{
+		std::cout << ((num & mask) != 0);
+		i++;
+		if (i == 1 || i == 9 || i == 24)
+			std::cout << ' ';
+	}
+	return "";
+}
+
+std::string	printBitsFloat(float num)
+{
+	int	*p = (int *)&num;
+	int i = 0;
+
+	for (unsigned int mask = 1U << (sizeof(float) *8 -1); mask; mask >>= 1)
+	{
+		std::cout << ((*p & mask) != 0);
+		i++;
+		if (i == 1 || i == 9 || i == 24)
+			std::cout << ' ';
+	}
+	return "";
+}
+
+
+/*
+ * statics variables initialisation
+ *
+ * for MAX integer :
+ * 00000000 01111111 11111111 11111111 ( 8388607) (-1U >> (this->_frac +1))
+ *              <= ... >=
+ * 11111111 10000000 00000000 00000000 (-8388608)
+ *
+ */
+
+int const Fixed::_frac = 8;
+int const Fixed::_max = -1U >> (_frac +1);
+int const Fixed::_min = ~_max;
+
+
+/*
+ * default constructor / copy constructor / destructor
+ */
+
+Fixed::Fixed() : _value(0) {
+	return;
+}
+
+Fixed::Fixed(Fixed const & src) {
+	*this = src;
+	return;
+}
+
+Fixed::~Fixed( void ) {
+	return;
+}
+
+
+/*
+ * int and float constructors
+ */
+
+Fixed::Fixed(int integer) {
+	if (integer < Fixed::_min || integer > Fixed::_max)
+		std::cout << "error: integer out of range" << '\n';
+	else
+		this->_value = integer << Fixed::_frac;
+}
+
+Fixed::Fixed(float const floater) {
+	if (floater < Fixed::_min || floater > Fixed::_max)
+		std::cout << "error: float out of range" << '\n';
+	else
+		this->_value = roundf(floater * (1 << Fixed::_frac));
+}
+
+
+/*
+ * assignement operator
+ */
+
+Fixed &	Fixed::operator=( Fixed const & rhs ) {
+	if ( this != &rhs )
+		this->_value = rhs.getRawBits();
+	return *this;
+}
+
+
+/*
+ * operators < ; > ; <= ; == ; != ; + ; - ; * ; / ; ++ ; --
+ * ref : https://en.cppreference.com/w/cpp/language/operators
+ * for division, if you want to avoid floats (legitimate) :
+ * https://stackoverflow.com/questions/8506317/fixed-point-unsigned-division-in-c
+ */
+
+bool	Fixed::operator< (Fixed const & rhs) const {
+	return this->_value < rhs._value;
+}
+bool	Fixed::operator> (Fixed const & rhs) const {
+	return rhs < *this;
+}
+bool	Fixed::operator<=(Fixed const & rhs) const {
+	return !(*this > rhs);
+}
+bool	Fixed::operator>=(Fixed const & rhs) const {
+	return !(*this < rhs);
+}
+bool	Fixed::operator==(Fixed const & rhs) const {
+	return this->_value == rhs._value;
+}
+bool	Fixed::operator!=(Fixed const & rhs) const {
+	return !(*this == rhs);
+}
+Fixed	Fixed::operator+ ( Fixed const & rhs ) const {
+	Fixed	result(*this);
+	result._value += rhs._value;
+	return (result);
+}
+Fixed	Fixed::operator- ( Fixed const & rhs ) const {
+	Fixed	result(*this);
+	result._value -= rhs._value;
+	return (result);
+}
+Fixed	Fixed::operator* ( Fixed const & rhs ) const {
+	Fixed	result(*this);
+	result._value = ((long)result._value * (long)rhs._value) >> Fixed::_frac;
+	return result;
+}
+Fixed	Fixed::operator/ ( Fixed const & rhs ) const {
+	Fixed	result(*this);
+	if (rhs._value == 0)
+		std::cout << "!impossible division by 0¡";
+	else
+		result._value = (long)(result._value << Fixed::_frac) / rhs._value;
+	return result;
+}
+Fixed &	Fixed::operator++() {
+	this->_value++;
+	return *this;
+}
+Fixed &	Fixed::operator--() {
+	this->_value--;
+	return *this;
+}
+Fixed	Fixed::operator++( int ) {
+	Fixed old = *this;
+	Fixed::operator++();
+	return old;
+}
+Fixed	Fixed::operator--( int ) {
+	Fixed old = *this;
+	Fixed::operator--();
+	return old;
+}
+
+
+/*
+ * returns min and max
+ */
+
+Fixed const &	Fixed::min(Fixed const & lhs, Fixed const & rhs) {
+	if (lhs < rhs)
+		return lhs;
+	return rhs;
+}
+Fixed const &	Fixed::max(Fixed const & lhs, Fixed const & rhs) {
+	if (lhs > rhs)
+		return lhs;
+	return rhs;
+}
+Fixed &	Fixed::min(Fixed & lhs, Fixed & rhs) {
+	if (lhs < rhs)
+		return lhs;
+	return rhs;
+}
+Fixed &	Fixed::max(Fixed & lhs, Fixed & rhs) {
+	if (lhs > rhs)
+		return lhs;
+	return rhs;
+}
+
+
+/*
+ * functions that returns _value
+ */
+
+int		Fixed::getRawBits( void ) const {
+	return this->_value;
+}
+
+void	Fixed::setRawBits( int const raw ) {
+	this->_value = raw;
+}
+
+int		Fixed::toInt( void ) const {
+	return (this->_value >> Fixed::_frac);
+}
+float	Fixed::toFloat( void ) const {
+	return ((float)this->_value / (float)(1 << Fixed::_frac));
+}
+
+
+/*
+ * overload "<<" -> output fixed point in float representation
+ * found here : https://github.com/pgomez-a/42_CPP_Piscine/blob/master/cpp02/ex01/Fixed.cpp
+ */
+
+std::ostream &	operator<<(std::ostream & o, Fixed const & rhs)
+{
+	o << rhs.toFloat();
+	return (o);
+}