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Add unit tests + fix issue when a mod b == 0 with b negative

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This commit is contained in:
Rudy Huyn 2019-03-31 16:53:15 -07:00
commit 4908efcb96
8 changed files with 195 additions and 84 deletions
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12
src/CalcManager/CEngine/Rational.cpp
View file

@ -182,6 +182,12 @@ namespace CalcEngine
return *this;
}
/// <summary>
/// Calculate the remainder after division, the sign of the result will match the sign of the current object.
/// </summary>
/// <remarks>
/// This function has the same behavior than the standard C/C++ operator '%', to calculate the modulus after division instead, use <see cref="Rational::operator%"/> instead.
/// </remarks>
Rational& Rational::operator%=(Rational const& rhs)
{
PRAT lhsRat = this->ToPRAT();
@ -342,6 +348,12 @@ namespace CalcEngine
return lhs;
}
/// <summary>
/// Calculate the remainder after division, the sign of the result will match the sign of a.
/// </summary>
/// <remarks>
/// This function has the same behavior than the standard C/C++ operator '%', to calculate the modulus after division instead, use <see cref="Rational::operator%"/> instead.
/// </remarks>
Rational operator%(Rational lhs, Rational const& rhs)
{
lhs %= rhs;

13
src/CalcManager/CEngine/RationalMath.cpp
View file

@ -388,11 +388,16 @@ Rational RationalMath::ATanh(Rational const& rat)
return result;
}
Rational RationalMath::Mod(Rational const& base, Rational const& n)
/// <summary>
/// Calculate the modulus after division, the sign of the result will match the sign of b.
/// </summary>
/// <remarks>
/// When one of the operand is negative, the result will differ from the C/C++ operator '%', use <see cref="Rational::operator%"/> instead to calculate the remainder after division.
/// </remarks>
Rational RationalMath::Mod(Rational const& a, Rational const& b)
{
PRAT prat = base.ToPRAT();
PRAT pn = n.ToPRAT();
PRAT prat = a.ToPRAT();
PRAT pn = b.ToPRAT();
try
{

4
src/CalcManager/Header Files/CalcEngine.h
View file

@ -45,7 +45,7 @@ namespace CalculationManager
class IResourceProvider;
}
namespace CalculatorUnitTests
namespace CalculatorEngineTests
{
class CalcEngineTests;
}
@ -159,5 +159,5 @@ private:
static void ChangeBaseConstants(uint32_t radix, int maxIntDigits, int32_t precision);
void BaseOrPrecisionChanged();
friend class CalculatorUnitTests::CalcEngineTests;
friend class CalculatorEngineTests::CalcEngineTests;
};

2
src/CalcManager/Header Files/RationalMath.h
View file

@ -13,7 +13,7 @@ namespace CalcEngine::RationalMath
Rational Pow(Rational const& base, Rational const& pow);
Rational Root(Rational const& base, Rational const& root);
Rational Fact(Rational const& rat);
Rational Mod(Rational const& base, Rational const& n);
Rational Mod(Rational const& a, Rational const& b);
Rational Exp(Rational const& rat);
Rational Log(Rational const& rat);

103
src/CalcManager/Ratpack/logic.cpp
View file

@ -18,54 +18,54 @@
using namespace std;
void lshrat( PRAT *pa, PRAT b, uint32_t radix, int32_t precision)
void lshrat(PRAT *pa, PRAT b, uint32_t radix, int32_t precision)
{
PRAT pwr= nullptr;
PRAT pwr = nullptr;
int32_t intb;
intrat(pa, radix, precision);
if ( !zernum( (*pa)->pp ) )
if (!zernum((*pa)->pp))
{
// If input is zero we're done.
if ( rat_gt( b, rat_max_exp, precision) )
if (rat_gt(b, rat_max_exp, precision))
{
// Don't attempt lsh of anything big
throw( CALC_E_DOMAIN );
throw(CALC_E_DOMAIN);
}
intb = rattoi32(b, radix, precision);
DUPRAT(pwr,rat_two);
DUPRAT(pwr, rat_two);
ratpowi32(&pwr, intb, precision);
mulrat(pa, pwr, precision);
destroyrat(pwr);
}
}
void rshrat( PRAT *pa, PRAT b, uint32_t radix, int32_t precision)
void rshrat(PRAT *pa, PRAT b, uint32_t radix, int32_t precision)
{
PRAT pwr= nullptr;
PRAT pwr = nullptr;
int32_t intb;
intrat(pa, radix, precision);
if ( !zernum( (*pa)->pp ) )
if (!zernum((*pa)->pp))
{
// If input is zero we're done.
if ( rat_lt( b, rat_min_exp, precision) )
if (rat_lt(b, rat_min_exp, precision))
{
// Don't attempt rsh of anything big and negative.
throw( CALC_E_DOMAIN );
throw(CALC_E_DOMAIN);
}
intb = rattoi32(b, radix, precision);
DUPRAT(pwr,rat_two);
DUPRAT(pwr, rat_two);
ratpowi32(&pwr, intb, precision);
divrat(pa, pwr, precision);
destroyrat(pwr);
}
}
void boolrat( PRAT *pa, PRAT b, int func, uint32_t radix, int32_t precision);
void boolnum( PNUMBER *pa, PNUMBER b, int func );
void boolrat(PRAT *pa, PRAT b, int func, uint32_t radix, int32_t precision);
void boolnum(PNUMBER *pa, PNUMBER b, int func);
enum {
@ -74,22 +74,22 @@ enum {
FUNC_XOR
} BOOL_FUNCS;
void andrat( PRAT *pa, PRAT b, uint32_t radix, int32_t precision)
void andrat(PRAT *pa, PRAT b, uint32_t radix, int32_t precision)
{
boolrat( pa, b, FUNC_AND, radix, precision);
boolrat(pa, b, FUNC_AND, radix, precision);
}
void orrat( PRAT *pa, PRAT b, uint32_t radix, int32_t precision)
void orrat(PRAT *pa, PRAT b, uint32_t radix, int32_t precision)
{
boolrat( pa, b, FUNC_OR, radix, precision);
boolrat(pa, b, FUNC_OR, radix, precision);
}
void xorrat( PRAT *pa, PRAT b, uint32_t radix, int32_t precision)
void xorrat(PRAT *pa, PRAT b, uint32_t radix, int32_t precision)
{
boolrat( pa, b, FUNC_XOR, radix, precision);
boolrat(pa, b, FUNC_XOR, radix, precision);
}
//---------------------------------------------------------------------------
@ -104,15 +104,15 @@ void xorrat( PRAT *pa, PRAT b, uint32_t radix, int32_t precision)
//
//---------------------------------------------------------------------------
void boolrat( PRAT *pa, PRAT b, int func, uint32_t radix, int32_t precision)
void boolrat(PRAT *pa, PRAT b, int func, uint32_t radix, int32_t precision)
{
PRAT tmp= nullptr;
intrat( pa, radix, precision);
DUPRAT(tmp,b);
intrat( &tmp, radix, precision);
PRAT tmp = nullptr;
intrat(pa, radix, precision);
DUPRAT(tmp, b);
intrat(&tmp, radix, precision);
boolnum( &((*pa)->pp), tmp->pp, func );
boolnum(&((*pa)->pp), tmp->pp, func);
destroyrat(tmp);
}
@ -130,11 +130,11 @@ void boolrat( PRAT *pa, PRAT b, int func, uint32_t radix, int32_t precision)
//
//---------------------------------------------------------------------------
void boolnum( PNUMBER *pa, PNUMBER b, int func )
void boolnum(PNUMBER *pa, PNUMBER b, int func)
{
PNUMBER c= nullptr;
PNUMBER a= nullptr;
PNUMBER c = nullptr;
PNUMBER a = nullptr;
MANTTYPE *pcha;
MANTTYPE *pchb;
MANTTYPE *pchc;
@ -143,25 +143,25 @@ void boolnum( PNUMBER *pa, PNUMBER b, int func )
MANTTYPE da;
MANTTYPE db;
a=*pa;
cdigits = max( a->cdigit+a->exp, b->cdigit+b->exp ) -
min( a->exp, b->exp );
createnum( c, cdigits );
c->exp = min( a->exp, b->exp );
a = *pa;
cdigits = max(a->cdigit + a->exp, b->cdigit + b->exp) -
min(a->exp, b->exp);
createnum(c, cdigits);
c->exp = min(a->exp, b->exp);
mexp = c->exp;
c->cdigit = cdigits;
pcha = a->mant;
pchb = b->mant;
pchc = c->mant;
for ( ;cdigits > 0; cdigits--, mexp++ )
for (; cdigits > 0; cdigits--, mexp++)
{
da = ( ( ( mexp >= a->exp ) && ( cdigits + a->exp - c->exp >
(c->cdigit - a->cdigit) ) ) ?
*pcha++ : 0 );
db = ( ( ( mexp >= b->exp ) && ( cdigits + b->exp - c->exp >
(c->cdigit - b->cdigit) ) ) ?
*pchb++ : 0 );
switch ( func )
da = (((mexp >= a->exp) && (cdigits + a->exp - c->exp >
(c->cdigit - a->cdigit))) ?
*pcha++ : 0);
db = (((mexp >= b->exp) && (cdigits + b->exp - c->exp >
(c->cdigit - b->cdigit))) ?
*pchb++ : 0);
switch (func)
{
case FUNC_AND:
*pchc++ = da & db;
@ -175,12 +175,12 @@ void boolnum( PNUMBER *pa, PNUMBER b, int func )
}
}
c->sign = a->sign;
while ( c->cdigit > 1 && *(--pchc) == 0 )
while (c->cdigit > 1 && *(--pchc) == 0)
{
c->cdigit--;
}
destroynum( *pa );
*pa=c;
destroynum(*pa);
*pa = c;
}
//-----------------------------------------------------------------------------
@ -191,8 +191,9 @@ void boolnum( PNUMBER *pa, PNUMBER b, int func )
//
// RETURN: None, changes pointer.
//
// DESCRIPTION: Calculate the remainder of *pa / b, equivalent of 'pa % b' in C;
// NOTE: produces a result that is either zero or has the same sign as the dividend.
// DESCRIPTION: Calculate the remainder of *pa / b,
// equivalent of 'pa % b' in C/C++ and produces a result
// that is either zero or has the same sign as the dividend.
//
//-----------------------------------------------------------------------------
@ -226,8 +227,10 @@ void remrat(PRAT *pa, PRAT b)
//
// RETURN: None, changes pointer.
//
// DESCRIPTION: Calculate the remainder of *pa / b, equivalent of 'pa modulo b' in arithmetic
// NOTE: produces a result that is either zero or has the same sign as the divisor.
// DESCRIPTION: Calculate the remainder of *pa / b, with the sign of the result
// either zero or has the same sign as the divisor.
// NOTE: When *pa or b are negative, the result won't be the same as
// the C/C++ operator %, use remrat if it's the behavior you expect.
//
//-----------------------------------------------------------------------------
@ -249,7 +252,7 @@ void modrat(PRAT *pa, PRAT b)
remnum(&((*pa)->pp), tmp->pp, BASEX);
mulnumx(&((*pa)->pq), tmp->pq);
if (needAdjust)
if (needAdjust && !zerrat(*pa))
{
addrat(pa, b, BASEX);
}

2
src/CalculatorUnitTests/CalcEngineTests.cpp
View file

@ -13,7 +13,7 @@ using namespace Microsoft::VisualStudio::CppUnitTestFramework;
static constexpr size_t MAX_HISTORY_SIZE = 20;
namespace CalculatorUnitTests
namespace CalculatorEngineTests
{
TEST_CLASS(CalcEngineTests)
{

2
src/CalculatorUnitTests/CalcInputTest.cpp
View file

@ -8,7 +8,7 @@ using namespace std;
using namespace CalculationManager;
using namespace Microsoft::VisualStudio::CppUnitTestFramework;
namespace CalculatorUnitTests
namespace CalculatorEngineTests
{
TEST_CLASS(CalcInputTest)
{

97
src/CalculatorUnitTests/RationalTest.cpp
View file

@ -10,7 +10,7 @@ using namespace CalcEngine;
using namespace CalcEngine::RationalMath;
using namespace Microsoft::VisualStudio::CppUnitTestFramework;
namespace CalculatorManagerTest
namespace CalculatorEngineTests
{
TEST_CLASS(RationalTest)
{
@ -44,10 +44,44 @@ namespace CalculatorManagerTest
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"-8113");
res = Mod(Rational(-643), Rational(-8756));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"-643");
res = Mod(Rational(1000), Rational(250));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"0");
res = Mod(Rational(1000), Rational(-250));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"0");
//Test with Zero
res = Mod(Rational(343654332), Rational(0));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"343654332");
res = Mod(Rational(0), Rational(8756));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"0");
res = Mod(Rational(0), Rational(-242));
auto dfd = res.ToString(10, FMT_FLOAT, 128);
VERIFY_ARE_EQUAL(dfd, L"0");
res = Mod(Rational(0), Rational(0));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"0");
res = Mod(Rational(Number(1, 0, { 23242 }), Number(1, 0, { 2 })), Rational(Number(1, 0, { 0 }), Number(1, 0, { 23 })));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"11621");
//Test with rational numbers
res = Mod(Rational(Number(1, 0, { 250 }), Number(1, 0, { 100 })), Rational(89));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"2.5");
res = Mod(Rational(Number(1, 0, { 3330 }), Number(1, 0, { 1332 })), Rational(1));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"0.5");
res = Mod(Rational(Number(1, 0, { 12250 }), Number(1, 0, { 100 })), Rational(10));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"2.5");
res = Mod(Rational(Number(-1, 0, { 12250 }), Number(1, 0, { 100 })), Rational(10));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"7.5");
res = Mod(Rational(Number(-1, 0, { 12250 }), Number(1, 0, { 100 })), Rational(-10));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"-2.5");
res = Mod(Rational(Number(1, 0, { 12250 }), Number(1, 0, { 100 })), Rational(-10));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"-7.5");
res = Mod(Rational(Number(1, 0, { 1000 }), Number(1, 0, { 3 })), Rational(1));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 8), L"0.33333333");
res = Mod(Rational(Number(1, 0, { 1000 }), Number(1, 0, { 3 })), Rational(-10));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 8), L"-6.6666667");
res = Mod(Rational(834345), Rational(Number(1, 0, { 103 }), Number(1, 0, { 100 })));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 8), L"0.71");
res = Mod(Rational(834345), Rational(Number(-1, 0, { 103 }), Number(1, 0, { 100 })));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 8), L"-0.32");
}
TEST_METHOD(RemainderTest)
@ -76,10 +110,39 @@ namespace CalculatorManagerTest
res = Rational(-643) % Rational(-8756);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"-643");
res = Rational(-124) % Rational(-124);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"0");
res = Rational(24) % Rational(24);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"0");
//Test with Zero
res = Rational(0) % Rational(3654);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"0");
res = Rational(0) % Rational(-242);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"0");
for (auto number : { 343654332, 0, -23423 })
{
try
{
res = Rational(343654332) % Rational(0);
res = Rational(number) % Rational(0);
Assert::Fail();
}
catch (uint32_t t)
{
if (t != CALC_E_INDEFINITE)
{
Assert::Fail();
}
}
catch (...)
{
Assert::Fail();
}
try
{
res = Rational(Number(1, number, { 0 }), Number(1, 0, { 2 })) % Rational(Number(1, 0, { 0 }), Number(1, 0, { 23 }));
Assert::Fail();
}
catch (uint32_t t)
@ -94,5 +157,33 @@ namespace CalculatorManagerTest
Assert::Fail();
}
}
//Test with rational numbers
res = Rational(Number(1, 0, { 250 }), Number(1, 0, { 100 })) % Rational(89);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"2.5");
res = Rational(Number(1, 0, { 3330 }), Number(1, 0, { 1332 })) % Rational(1);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"0.5");
res = Rational(Number(1, 0, { 12250 }), Number(1, 0, { 100 })) % Rational(10);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"2.5");
res = Rational(Number(-1, 0, { 12250 }), Number(1, 0, { 100 })) % Rational(10);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"-2.5");
res = Rational(Number(-1, 0, { 12250 }), Number(1, 0, { 100 })) % Rational(-10);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"-2.5");
res = Rational(Number(1, 0, { 12250 }), Number(1, 0, { 100 })) % Rational(-10);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 128), L"2.5");
res = Rational(Number(1, 0, { 1000 }), Number(1, 0, { 3 })) % Rational(1);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 8), L"0.33333333");
res = Rational(Number(1, 0, { 1000 }), Number(1, 0, { 3 })) % Rational(-10);
auto sdsdas = res.ToString(10, FMT_FLOAT, 8);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 8), L"3.3333333");
res = Rational(Number(-1, 0, { 1000 }), Number(1, 0, { 3 })) % Rational(-10);
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 8), L"-3.3333333");
res = Rational(834345) % Rational(Number(1, 0, { 103 }), Number(1, 0, { 100 }));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 8), L"0.71");
res = Rational(834345) % Rational(Number(-1, 0, { 103 }), Number(1, 0, { 100 }));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 8), L"0.71");
res = Rational(-834345) % Rational(Number(1, 0, { 103 }), Number(1, 0, { 100 }));
VERIFY_ARE_EQUAL(res.ToString(10, FMT_FLOAT, 8), L"-0.71");
}
};
}