QCA::BigInteger
#include <QtCrypto>
Public Member Functions | |
BigInteger () | |
BigInteger (int n) | |
BigInteger (const char *c) | |
BigInteger (const QString &s) | |
BigInteger (const QCA::SecureArray &a) | |
BigInteger (const BigInteger &from) | |
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 Functions | |
(Note that these are not member functions.) | |
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
QCA::BigInteger::BigInteger | ( | ) |
Constructor.
Creates a new BigInteger, initialised to zero.
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.
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
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
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
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
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
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
bool QCA::BigInteger::fromString | ( | const QString & | s | ) |
|
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.
BigInteger& QCA::BigInteger::operator%= | ( | const BigInteger & | b | ) |
Modulo in place operator.
- Parameters
-
b the amount to divide by
BigInteger& QCA::BigInteger::operator*= | ( | const BigInteger & | b | ) |
Multiply in place operator.
- Parameters
-
b the amount to multiply by
BigInteger& QCA::BigInteger::operator+= | ( | const BigInteger & | b | ) |
Increment in place operator.
- Parameters
-
b the amount to increment by
BigInteger& QCA::BigInteger::operator-= | ( | const BigInteger & | b | ) |
Decrement in place operator.
- Parameters
-
b the amount to decrement by
BigInteger& QCA::BigInteger::operator/= | ( | const BigInteger & | b | ) |
Divide in place operator.
- Parameters
-
b the amount to divide by
|
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.
|
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.
BigInteger& QCA::BigInteger::operator= | ( | const BigInteger & | from | ) |
Assignment operator.
- Parameters
-
from the BigInteger to copy from
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)
|
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.
|
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.
|
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.
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);
QString QCA::BigInteger::toString | ( | ) | const |
Convert BigInteger to a QString.
- Examples:
- certtest.cpp.
Friends And Related Function Documentation
|
related |
Stream operator.
- Parameters
-
stream the stream to write to b the integer to write to the stream
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