OSS/tanya
1
0
Fork 0
Code Issues 1 Pull Requests Releases Activity

Remove math function wrappers

Browse Source
This commit is contained in:
Eugen Wissner 2022-06-01 12:55:03 +02:00
parent 81b4fb88f5
commit 7dd4c44140
Signed by: belka
GPG Key ID: A27FDC1E8EE902C0
3 changed files with 3 additions and 184 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

111
source/tanya/math/nbtheory.d
View File

@ -1,111 +0,0 @@
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
* Number theory.
*
* Copyright: Eugene Wissner 2017-2020.
* License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
* Mozilla Public License, v. 2.0).
* Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
* Source: $(LINK2 https://github.com/caraus-ecms/tanya/blob/master/source/tanya/math/nbtheory.d,
* tanya/math/nbtheory.d)
*/
module tanya.math.nbtheory;
import tanya.meta.trait;
import tanya.meta.transform;
import core.math : fabs;
import std.math : log;
/**
* Calculates the absolute value of a number.
*
* Params:
* T = Argument type.
* x = Argument.
*
* Returns: Absolute value of $(D_PARAM x).
*/
Unqual!T abs(T)(T x)
if (isIntegral!T)
{
static if (isSigned!T)
{
return x >= 0 ? x : -x;
}
else
{
return x;
}
}
///
@nogc nothrow pure @safe unittest
{
int i = -1;
assert(i.abs == 1);
static assert(is(typeof(i.abs) == int));
uint u = 1;
assert(u.abs == 1);
static assert(is(typeof(u.abs) == uint));
}
/// ditto
Unqual!T abs(T)(T x)
if (isFloatingPoint!T)
{
return fabs(x);
}
///
@nogc nothrow pure @safe unittest
{
float f = -1.64;
assert(f.abs == 1.64F);
static assert(is(typeof(f.abs) == float));
double d = -1.64;
assert(d.abs == 1.64);
static assert(is(typeof(d.abs) == double));
real r = -1.64;
assert(r.abs == 1.64L);
static assert(is(typeof(r.abs) == real));
}
/**
* Calculates natural logarithm of $(D_PARAM x).
*
* Params:
* T = Argument type.
* x = Argument.
*
* Returns: Natural logarithm of $(D_PARAM x).
*/
Unqual!T ln(T)(T x)
if (isFloatingPoint!T)
{
return log(x);
}
///
@nogc nothrow pure @safe unittest
{
import tanya.math;
assert(isNaN(ln(-7.389f)));
assert(isNaN(ln(-7.389)));
assert(isNaN(ln(-7.389L)));
assert(isInfinity(ln(0.0f)));
assert(isInfinity(ln(0.0)));
assert(isInfinity(ln(0.0L)));
assert(ln(1.0f) == 0.0f);
assert(ln(1.0) == 0.0);
assert(ln(1.0L) == 0.0L);
}

74
source/tanya/math/package.d
View File

@ -12,7 +12,7 @@
* be found in its submodules. $(D_PSYMBOL tanya.math) doesn't import any * be found in its submodules. $(D_PSYMBOL tanya.math) doesn't import any
* submodules publically, they should be imported explicitly. * submodules publically, they should be imported explicitly.
* *
* Copyright: Eugene Wissner 2016-2020. * Copyright: Eugene Wissner 2016-2022.
* License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/, * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
* Mozilla Public License, v. 2.0). * Mozilla Public License, v. 2.0).
* Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner) * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@ -21,7 +21,7 @@
*/ */
module tanya.math; module tanya.math;
import tanya.math.nbtheory; import std.math;
import tanya.meta.trait; import tanya.meta.trait;
import tanya.meta.transform; import tanya.meta.transform;
@ -543,73 +543,3 @@ if (isFloatingPoint!F)
assert(signBit(-1.0L)); assert(signBit(-1.0L));
assert(!signBit(1.0L)); assert(!signBit(1.0L));
} }
/**
* Computes $(D_PARAM x) to the power $(D_PARAM y) modulo $(D_PARAM z).
*
* Params:
* I = Base type.
* G = Exponent type.
* H = Divisor type:
* x = Base.
* y = Exponent.
* z = Divisor.
*
* Returns: Reminder of the division of $(D_PARAM x) to the power $(D_PARAM y)
* by $(D_PARAM z).
*
* Precondition: $(D_INLINECODE z > 0)
*/
H pow(I, G, H)(in auto ref I x, in auto ref G y, in auto ref H z)
if (isIntegral!I && isIntegral!G && isIntegral!H)
in
{
assert(z > 0, "Division by zero");
}
do
{
G mask = G.max / 2 + 1;
H result;
if (y == 0)
{
return 1 % z;
}
else if (y == 1)
{
return x % z;
}
do
{
immutable bit = y & mask;
if (!result && bit)
{
result = x;
continue;
}
result *= result;
if (bit)
{
result *= x;
}
result %= z;
}
while (mask >>= 1);
return result;
}
///
@nogc nothrow pure @safe unittest
{
assert(pow(3, 5, 7) == 5);
assert(pow(2, 2, 1) == 0);
assert(pow(3, 3, 3) == 0);
assert(pow(7, 4, 2) == 1);
assert(pow(53, 0, 2) == 1);
assert(pow(53, 1, 3) == 2);
assert(pow(53, 2, 5) == 4);
assert(pow(0, 0, 5) == 1);
assert(pow(0, 5, 5) == 0);
}

2
source/tanya/math/random.d
View File

@ -5,7 +5,7 @@
/** /**
* Random number generator. * Random number generator.
* *
* Copyright: Eugene Wissner 2016-2020. * Copyright: Eugene Wissner 2016-2022.
* License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/, * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
* Mozilla Public License, v. 2.0). * Mozilla Public License, v. 2.0).
* Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner) * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)