LSST Applications g034a557a3c+dd8dd8f11d,g0afe43252f+b86e4b8053,g11f7dcd041+017865fdd3,g1cd03abf6b+8446defddb,g1ce3e0751c+f991eae79d,g28da252d5a+ca8a1a9fb3,g2bbee38e9b+b6588ad223,g2bc492864f+b6588ad223,g2cdde0e794+8523d0dbb4,g347aa1857d+b6588ad223,g35bb328faa+b86e4b8053,g3a166c0a6a+b6588ad223,g461a3dce89+b86e4b8053,g52b1c1532d+b86e4b8053,g7f3b0d46df+ad13c1b82d,g80478fca09+f29c5d6c70,g858d7b2824+293f439f82,g8cd86fa7b1+af721d2595,g965a9036f2+293f439f82,g979bb04a14+51ed57f74c,g9ddcbc5298+f24b38b85a,gae0086650b+b86e4b8053,gbb886bcc26+b97e247655,gc28159a63d+b6588ad223,gc30aee3386+a2f0f6cab9,gcaf7e4fdec+293f439f82,gcd45df26be+293f439f82,gcdd4ae20e8+70b5def7e6,gce08ada175+da9c58a417,gcf0d15dbbd+70b5def7e6,gdaeeff99f8+006e14e809,gdbce86181e+6a170ce272,ge3d4d395c2+224150c836,ge5f7162a3a+bb2241c923,ge6cb8fbbf7+d119aed356,ge79ae78c31+b6588ad223,gf048a9a2f4+40ffced2b8,gf0baf85859+b4cca3d10f,w.2024.30
LSST Data Management Base Package
|
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. | |
BigInteger & | operator= (BigInteger const &b) |
int | getSign () const |
getSign returns -1, 0 or 1 if this integer is negative, zero or positive. | |
unsigned | getSize () const |
getSize returns the number of digits in the value of this integer. | |
unsigned | getCapacity () const |
getCapacity returns the number of digits in the underlying digit array. | |
uint32_t const * | getDigits () const |
getDigits returns the underlying digit array. | |
void | setToZero () |
setToZero sets this integer to zero. | |
void | setTo (int64_t x) |
setTo sets this integer to the given signed 64 bit integer value. | |
void | setTo (uint64_t x) |
setTo sets this integer to the given unsigned 64 bit integer value. | |
void | negate () |
negate multiplies this integer by -1. | |
BigInteger & | add (BigInteger const &b) |
add adds b to this integer. | |
BigInteger & | subtract (BigInteger const &b) |
subtract subtracts b from this integer. | |
BigInteger & | multiplyPow2 (unsigned n) |
multiplyPow2 multiplies this integer by 2ⁿ. | |
BigInteger & | multiply (BigInteger const &b) |
multiply multiplies this integer by b. | |
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 52 of file BigInteger.h.
|
inline |
This constructor creates a zero-valued integer with the given digit array.
Definition at line 56 of file BigInteger.h.
BigInteger & lsst::sphgeom::BigInteger::add | ( | BigInteger const & | b | ) |
add
adds b to this integer.
Definition at line 163 of file BigInteger.cc.
|
inline |
getCapacity
returns the number of digits in the underlying digit array.
Definition at line 82 of file BigInteger.h.
|
inline |
getDigits
returns the underlying digit array.
Definition at line 85 of file BigInteger.h.
|
inline |
getSign
returns -1, 0 or 1 if this integer is negative, zero or positive.
Definition at line 75 of file BigInteger.h.
|
inline |
getSize
returns the number of digits in the value of this integer.
Definition at line 78 of file BigInteger.h.
BigInteger & lsst::sphgeom::BigInteger::multiply | ( | BigInteger const & | b | ) |
multiply
multiplies this integer by b.
Definition at line 256 of file BigInteger.cc.
BigInteger & lsst::sphgeom::BigInteger::multiplyPow2 | ( | unsigned | n | ) |
multiplyPow2
multiplies this integer by 2ⁿ.
Definition at line 221 of file BigInteger.cc.
|
inline |
negate
multiplies this integer by -1.
Definition at line 110 of file BigInteger.h.
|
inline |
Definition at line 63 of file BigInteger.h.
|
inline |
setTo
sets this integer to the given signed 64 bit integer value.
Definition at line 91 of file BigInteger.h.
|
inline |
setTo
sets this integer to the given unsigned 64 bit integer value.
Definition at line 101 of file BigInteger.h.
|
inline |
setToZero
sets this integer to zero.
Definition at line 88 of file BigInteger.h.
BigInteger & lsst::sphgeom::BigInteger::subtract | ( | BigInteger const & | b | ) |
subtract
subtracts b from this integer.
Definition at line 208 of file BigInteger.cc.