QCA::BigInteger
#include <QtCrypto>
Public Member Functions | |
BigInteger () | |
BigInteger (const BigInteger &from) | |
BigInteger (const char *c) | |
BigInteger (const QCA::SecureArray &a) | |
BigInteger (const QString &s) | |
BigInteger (int n) | |
int | compare (const BigInteger &n) const |
void | fromArray (const QCA::SecureArray &a) |
bool | fromString (const QString &s) |
bool | operator!= (const BigInteger &other) const |
BigInteger & | operator%= (const BigInteger &b) |
BigInteger & | operator*= (const BigInteger &b) |
BigInteger & | operator+= (const BigInteger &b) |
BigInteger & | operator-= (const BigInteger &b) |
BigInteger & | operator/= (const BigInteger &b) |
bool | operator< (const BigInteger &other) const |
bool | operator<= (const BigInteger &other) const |
BigInteger & | operator= (const BigInteger &from) |
BigInteger & | operator= (const QString &s) |
bool | operator== (const BigInteger &other) const |
bool | operator> (const BigInteger &other) const |
bool | operator>= (const BigInteger &other) const |
QCA::SecureArray | toArray () const |
QString | toString () const |
Related Symbols | |
(Note that these are not member symbols.) | |
QCA_EXPORT QTextStream & | operator<< (QTextStream &stream, const BigInteger &b) |
Detailed Description
Arbitrary precision integer.
BigInteger provides arbitrary precision integers.
Definition at line 570 of file qca_tools.h.
Constructor & Destructor Documentation
◆ BigInteger() [1/6]
QCA::BigInteger::BigInteger | ( | ) |
Constructor.
Creates a new BigInteger, initialised to zero.
◆ BigInteger() [2/6]
QCA::BigInteger::BigInteger | ( | int | n | ) |
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
- Parameters
-
n an alternative integer initialisation value.
◆ BigInteger() [3/6]
QCA::BigInteger::BigInteger | ( | const char * | c | ) |
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
- Parameters
-
c an alternative initialisation value, encoded as a character array
◆ BigInteger() [4/6]
QCA::BigInteger::BigInteger | ( | const QString & | s | ) |
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
- Parameters
-
s an alternative initialisation value, encoded as a string
◆ BigInteger() [5/6]
QCA::BigInteger::BigInteger | ( | const QCA::SecureArray & | a | ) |
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
- Parameters
-
a an alternative initialisation value, encoded as SecureArray
◆ BigInteger() [6/6]
QCA::BigInteger::BigInteger | ( | const BigInteger & | from | ) |
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
- Parameters
-
from an alternative initialisation value, encoded as a BigInteger
Member Function Documentation
◆ compare()
int QCA::BigInteger::compare | ( | const BigInteger & | n | ) | const |
Compare this value with another BigInteger.
Normally it is more readable to use one of the operator overloads, so you don't need to use this method directly.
- Parameters
-
n the BigInteger to compare with
- Returns
- zero if the values are the same, negative if the argument is less than the value of this BigInteger, and positive if the argument value is greater than this BigInteger
◆ fromArray()
void QCA::BigInteger::fromArray | ( | const QCA::SecureArray & | a | ) |
Assign from an array.
The input is expected to be a binary integer in sign-extended network-byte-order.
- Parameters
-
a a SecureArray that represents an integer
◆ fromString()
bool QCA::BigInteger::fromString | ( | const QString & | s | ) |
◆ operator!=()
|
inline |
Inequality operator.
Returns true if the two BigInteger values are different in magnitude, sign or both.
- Parameters
-
other the BigInteger to compare to
Definition at line 780 of file qca_tools.h.
◆ operator%=()
BigInteger & QCA::BigInteger::operator%= | ( | const BigInteger & | b | ) |
Modulo in place operator.
- Parameters
-
b the amount to divide by
◆ operator*=()
BigInteger & QCA::BigInteger::operator*= | ( | const BigInteger & | b | ) |
Multiply in place operator.
- Parameters
-
b the amount to multiply by
◆ operator+=()
BigInteger & QCA::BigInteger::operator+= | ( | const BigInteger & | b | ) |
Increment in place operator.
- Parameters
-
b the amount to increment by
◆ operator-=()
BigInteger & QCA::BigInteger::operator-= | ( | const BigInteger & | b | ) |
Decrement in place operator.
- Parameters
-
b the amount to decrement by
◆ operator/=()
BigInteger & QCA::BigInteger::operator/= | ( | const BigInteger & | b | ) |
Divide in place operator.
- Parameters
-
b the amount to divide by
◆ operator<()
|
inline |
Less than operator.
Returns true if the BigInteger value on the left hand side is less than the BigInteger value on the right hand side.
- Parameters
-
other the BigInteger to compare to
Definition at line 816 of file qca_tools.h.
◆ operator<=()
|
inline |
Less than or equal operator.
Returns true if the BigInteger value on the left hand side is equal to or less than the BigInteger value on the right hand side.
- Parameters
-
other the BigInteger to compare to
Definition at line 792 of file qca_tools.h.
◆ operator=() [1/2]
BigInteger & QCA::BigInteger::operator= | ( | const BigInteger & | from | ) |
Assignment operator.
- Parameters
-
from the BigInteger to copy from
◆ operator=() [2/2]
BigInteger & QCA::BigInteger::operator= | ( | const QString & | s | ) |
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
- Parameters
-
s the QString containing an integer representation
- See also
- bool fromString(const QString &s)
- Note
- it is the application's responsibility to make sure that the QString represents a valid integer (ie it only contains numbers and an optional minus sign at the start)
◆ operator==()
|
inline |
Equality operator.
Returns true if the two BigInteger values are the same, including having the same sign.
- Parameters
-
other the BigInteger to compare to
Definition at line 769 of file qca_tools.h.
◆ operator>()
|
inline |
Greater than operator.
Returns true if the BigInteger value on the left hand side is greater than the BigInteger value on the right hand side.
- Parameters
-
other the BigInteger to compare to
Definition at line 828 of file qca_tools.h.
◆ operator>=()
|
inline |
Greater than or equal operator.
Returns true if the BigInteger value on the left hand side is equal to or greater than the BigInteger value on the right hand side.
- Parameters
-
other the BigInteger to compare to
Definition at line 804 of file qca_tools.h.
◆ toArray()
QCA::SecureArray QCA::BigInteger::toArray | ( | ) | const |
Output BigInteger as a byte array, useful for storage or transmission.
The format is a binary integer in sign-extended network-byte-order.
- See also
- void fromArray(const SecureArray &a);
◆ toString()
QString QCA::BigInteger::toString | ( | ) | const |
Convert BigInteger to a QString.
- Examples
- certtest.cpp.
Friends And Related Symbol Documentation
◆ operator<<()
|
related |
Stream operator.
- Parameters
-
stream the stream to write to b the integer to write to the stream
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