LSSTApplications
19.0.0-14-gb0260a2+72efe9b372,20.0.0+7927753e06,20.0.0+8829bf0056,20.0.0+995114c5d2,20.0.0+b6f4b2abd1,20.0.0+bddc4f4cbe,20.0.0-1-g253301a+8829bf0056,20.0.0-1-g2b7511a+0d71a2d77f,20.0.0-1-g5b95a8c+7461dd0434,20.0.0-12-g321c96ea+23efe4bbff,20.0.0-16-gfab17e72e+fdf35455f6,20.0.0-2-g0070d88+ba3ffc8f0b,20.0.0-2-g4dae9ad+ee58a624b3,20.0.0-2-g61b8584+5d3db074ba,20.0.0-2-gb780d76+d529cf1a41,20.0.0-2-ged6426c+226a441f5f,20.0.0-2-gf072044+8829bf0056,20.0.0-2-gf1f7952+ee58a624b3,20.0.0-20-geae50cf+e37fec0aee,20.0.0-25-g3dcad98+544a109665,20.0.0-25-g5eafb0f+ee58a624b3,20.0.0-27-g64178ef+f1f297b00a,20.0.0-3-g4cc78c6+e0676b0dc8,20.0.0-3-g8f21e14+4fd2c12c9a,20.0.0-3-gbd60e8c+187b78b4b8,20.0.0-3-gbecbe05+48431fa087,20.0.0-38-ge4adf513+a12e1f8e37,20.0.0-4-g97dc21a+544a109665,20.0.0-4-gb4befbc+087873070b,20.0.0-4-gf910f65+5d3db074ba,20.0.0-5-gdfe0fee+199202a608,20.0.0-5-gfbfe500+d529cf1a41,20.0.0-6-g64f541c+d529cf1a41,20.0.0-6-g9a5b7a1+a1cd37312e,20.0.0-68-ga3f3dda+5fca18c6a4,20.0.0-9-g4aef684+e18322736b,w.2020.45
LSSTDataManagementBasePackage
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BigInteger
is an arbitrary precision signed integer class.
More...
#include <BigInteger.h>
Public Member Functions | |
BigInteger (uint32_t *digits, unsigned capacity) | |
This constructor creates a zero-valued integer with the given digit array. More... | |
BigInteger & | operator= (BigInteger const &b) |
int | getSign () const |
getSign returns -1, 0 or 1 if this integer is negative, zero or positive. More... | |
unsigned | getSize () const |
getSize returns the number of digits in the value of this integer. More... | |
unsigned | getCapacity () const |
getCapacity returns the number of digits in the underlying digit array. More... | |
uint32_t const * | getDigits () const |
getDigits returns the underlying digit array. More... | |
void | setToZero () |
setToZero sets this integer to zero. More... | |
void | setTo (int64_t x) |
setTo sets this integer to the given signed 64 bit integer value. More... | |
void | setTo (uint64_t x) |
setTo sets this integer to the given unsigned 64 bit integer value. More... | |
void | negate () |
negate multiplies this integer by -1. More... | |
BigInteger & | add (BigInteger const &b) |
add adds b to this integer. More... | |
BigInteger & | subtract (BigInteger const &b) |
subtract subtracts b from this integer. More... | |
BigInteger & | multiplyPow2 (unsigned n) |
multiplyPow2 multiplies this integer by 2ⁿ. More... | |
BigInteger & | multiply (BigInteger const &b) |
multiply multiplies this integer by b. More... | |
BigInteger
is an arbitrary precision signed integer class.
It is intended to be used in applications which need relatively small integers, and only supports addition, subtraction and multiplication.
Internally, a BigInteger consists of a sign and an unsigned magnitude. The magnitude is represented by an array of 32 bit digits, stored from least to most significant. All non-zero integers have at least one digit, the most significant of which is non-zero. Zero is defined to have no digits.
Definition at line 45 of file BigInteger.h.
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This constructor creates a zero-valued integer with the given digit array.
Definition at line 49 of file BigInteger.h.
BigInteger & lsst::sphgeom::BigInteger::add | ( | BigInteger const & | b | ) |
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getCapacity
returns the number of digits in the underlying digit array.
Definition at line 75 of file BigInteger.h.
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getDigits
returns the underlying digit array.
Definition at line 78 of file BigInteger.h.
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getSign
returns -1, 0 or 1 if this integer is negative, zero or positive.
Definition at line 68 of file BigInteger.h.
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getSize
returns the number of digits in the value of this integer.
Definition at line 71 of file BigInteger.h.
BigInteger & lsst::sphgeom::BigInteger::multiply | ( | BigInteger const & | b | ) |
BigInteger & lsst::sphgeom::BigInteger::multiplyPow2 | ( | unsigned | n | ) |
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negate
multiplies this integer by -1.
Definition at line 103 of file BigInteger.h.
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Definition at line 56 of file BigInteger.h.
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setTo
sets this integer to the given unsigned 64 bit integer value.
Definition at line 94 of file BigInteger.h.
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setToZero
sets this integer to zero.
Definition at line 81 of file BigInteger.h.
BigInteger & lsst::sphgeom::BigInteger::subtract | ( | BigInteger const & | b | ) |
subtract
subtracts b from this integer.
Definition at line 201 of file BigInteger.cc.