# SparseArray

from pandac.PandaModules import SparseArray

Class : SparseArray
Description : This class records a set of integers, where each integer is either present or not present in the set.
It is similar in principle and in interface to a BitArray (which can be thought of as a set of integers, one integer corresponding to each different bit position), but the SparseArray is implemented as a list of min/max subrange lists, rather than as a bitmask.
This makes it particularly efficient for storing sets which consist of large sections of consecutively included or consecutively excluded elements, with arbitrarily large integers, but particularly inefficient for doing boolean operations such as & or |.
Also, unlike BitArray, the SparseArray can store negative integers.

## Inheritance:

SparseArray:

## Methods of SparseArray:

SparseArray (Constructor)
allOff
allOn
bit
clear
clearBit
clearRange
compareTo
getBit
getClassType
getHighestBits
getHighestOffBit
getHighestOnBit
getLowestOffBit
getLowestOnBit
getMaxNumBits
getNextHigherDifferentBit
getNumBits
getNumOffBits
getNumOnBits
getNumSubranges
getSubrangeBegin
getSubrangeEnd
hasAllOf
hasAnyOf
hasBitsInCommon
hasMaxNumBits
invertInPlace
isAllOn
isInverse
isZero
lowerOn
operator !=
operator &
operator &=
operator <
operator <<
operator <<=
operator =
operator ==
operator >>
operator >>=
operator ^
operator ^=
operator |
operator |=
operator ~
output
range
setBit
setBitTo
setRange
setRangeTo

SparseArray SparseArray::SparseArray(void); Description:

allOff static SparseArray SparseArray::all_off(void); Description: Returns a SparseArray whose bits are all off.

allOn static SparseArray SparseArray::all_on(void); Description: Returns a SparseArray with an infinite array of bits, all on.

bit static SparseArray SparseArray::bit(int index); Description: Returns a SparseArray with only the indicated bit on.

clear void SparseArray::clear(void); Description: Sets all the bits in the SparseArray off.

clearBit void SparseArray::clear_bit(int index); Description: Sets the nth bit off. If n >= get_num_bits(), this automatically extends the array.

clearRange void SparseArray::clear_range(int low_bit, int size); Description: Sets the indicated range of bits off.

compareTo int SparseArray::compare_to(SparseArray const &other) const; Description: Returns a number less than zero if this SparseArray sorts before the indicated other SparseArray, greater than zero if it sorts after, or 0 if they are equivalent. This is based on the same ordering defined by operator <.

getBit bool SparseArray::get_bit(int index) const; Description: Returns true if the nth bit is set, false if it is cleared. It is valid for n to increase beyond get_num_bits(), but the return value get_num_bits() will always be the same.

getClassType static TypeHandle SparseArray::get_class_type(void); Undocumented function.

getHighestBits bool SparseArray::get_highest_bits(void) const; Description: Returns true if the infinite set of bits beyond get_num_bits() are all on, or false of they are all off.

getHighestOffBit int SparseArray::get_highest_off_bit(void) const; Description: Returns the index of the highest 0 bit in the array. Returns -1 if there are no 0 bits or if there an infinite number of 1 bits.

getHighestOnBit int SparseArray::get_highest_on_bit(void) const; Description: Returns the index of the highest 1 bit in the array. Returns -1 if there are no 1 bits or if there an infinite number of 1 bits.

getLowestOffBit int SparseArray::get_lowest_off_bit(void) const; Description: Returns the index of the lowest 0 bit in the array. Returns -1 if there are no 0 bits or if there are an infinite number of 1 bits.

getLowestOnBit int SparseArray::get_lowest_on_bit(void) const; Description: Returns the index of the lowest 1 bit in the array. Returns -1 if there are no 1 bits or if there are an infinite number of 1 bits.

getMaxNumBits static int SparseArray::get_max_num_bits(void); Description: If get_max_num_bits() returned true, this method may be called to return the maximum number of bits that may be stored in this structure. It is an error to call this if get_max_num_bits() return false. It is always an error to call this method. The SparseArray has no maximum number of bits. This method is defined so generic programming algorithms can use BitMask or SparseArray interchangeably.

getNextHigherDifferentBit int SparseArray::get_next_higher_different_bit(int low_bit) const; Description: Returns the index of the next bit in the array, above low_bit, whose value is different that the value of low_bit. Returns low_bit again if all bits higher than low_bit have the same value. This can be used to quickly iterate through all of the bits in the array.

getNumBits int SparseArray::get_num_bits(void) const; Description: Returns the current number of possibly different bits in this array. There are actually an infinite number of bits, but every bit higher than this bit will have the same value, either 0 or 1 (see get_highest_bits()). This number may grow and/or shrink automatically as needed.

getNumOffBits int SparseArray::get_num_off_bits(void) const; Description: Returns the number of bits that are set to 0 in the array. Returns -1 if there are an infinite number of 0 bits.

getNumOnBits int SparseArray::get_num_on_bits(void) const; Description: Returns the number of bits that are set to 1 in the array. Returns -1 if there are an infinite number of 1 bits.

getNumSubranges int SparseArray::get_num_subranges(void) const; Description: Returns the number of separate subranges stored in the SparseArray. You can use this limit to iterate through the subranges, calling get_subrange_begin() and get_subrange_end() for each one. Also see is_inverse().

getSubrangeBegin int SparseArray::get_subrange_begin(int n) const; Description: Returns the first numeric element in the nth subrange. Also see is_inverse().

getSubrangeEnd int SparseArray::get_subrange_end(int n) const; Description: Returns the last numeric element, plus one, in the nth subrange. Also see is_inverse().

hasAllOf bool SparseArray::has_all_of(int low_bit, int size) const; Description: Returns true if all bits in the indicated range are set, false otherwise.

hasAnyOf bool SparseArray::has_any_of(int low_bit, int size) const; Description: Returns true if any bit in the indicated range is set, false otherwise.

hasBitsInCommon bool SparseArray::has_bits_in_common(SparseArray const &other) const; Description: Returns true if this SparseArray has any "one" bits in common with the other one, false otherwise. This is equivalent to (array & other) != 0, but may be faster.

hasMaxNumBits static bool SparseArray::has_max_num_bits(void); Description: Returns true if there is a maximum number of bits that may be stored in this structure, false otherwise. If this returns true, the number may be queried in get_max_num_bits(). This method always returns false. The SparseArray has no maximum number of bits. This method is defined so generic programming algorithms can use BitMask or SparseArray interchangeably.

invertInPlace void SparseArray::invert_in_place(void); Description: Inverts all the bits in the SparseArray. This is equivalent to array = ~array.

isAllOn bool SparseArray::is_all_on(void) const; Description: Returns true if the entire bitmask is one, false otherwise.

isInverse bool SparseArray::is_inverse(void) const; Description: If this is true, the SparseArray is actually defined as a list of subranges of integers that are *not* in the set. If this is false (the default), then the subranges define the integers that *are* in the set. This affects the interpretation of the values returned by iterating through get_num_subranges().

isZero bool SparseArray::is_zero(void) const; Description: Returns true if the entire bitmask is zero, false otherwise.

lowerOn static SparseArray SparseArray::lower_on(int on_bits); Description: Returns a SparseArray whose lower on_bits bits are on.

operator != bool SparseArray::operator !=(SparseArray const &other) const; Description:

operator & SparseArray SparseArray::operator &(SparseArray const &other) const; Description:

operator &= void SparseArray::operator &=(SparseArray const &other); Description:

operator < bool SparseArray::operator <(SparseArray const &other) const; Description: Returns true if the unsigned integer which is represented by this SparseArray is less than that of the other one, false otherwise.

operator << SparseArray SparseArray::operator <<(int shift) const; Description:

operator <<= void SparseArray::operator <<=(int shift); Description: Logical left shift. Since negative bit positions have meaning in a SparseArray, real bit values are rotated in on the left (not necessarily zero).

operator = SparseArray &SparseArray::operator =(SparseArray const &copy); Description:

operator == bool SparseArray::operator ==(SparseArray const &other) const; Description:

operator >> SparseArray SparseArray::operator >>(int shift) const; Description:

operator >>= void SparseArray::operator >>=(int shift); Description: Logical right shift. The rightmost bits become negative, but are not lost; they will reappear into the zero position if the array is later left-shifted.

operator ^ SparseArray SparseArray::operator ^(SparseArray const &other) const; Description:

operator ^= void SparseArray::operator ^=(SparseArray const &other); Description:

operator | SparseArray SparseArray::operator |(SparseArray const &other) const; Description:

operator |= void SparseArray::operator |=(SparseArray const &other); Description:

operator ~ SparseArray SparseArray::operator ~(void) const; Undocumented function.

output void SparseArray::output(ostream &out) const; Description:

range static SparseArray SparseArray::range(int low_bit, int size); Description: Returns a SparseArray whose size bits, beginning at low_bit, are on.

setBit void SparseArray::set_bit(int index); Description: Sets the nth bit on. If n >= get_num_bits(), this automatically extends the array.

setBitTo void SparseArray::set_bit_to(int index, bool value); Description: Sets the nth bit either on or off, according to the indicated bool value.

setRange void SparseArray::set_range(int low_bit, int size); Description: Sets the indicated range of bits on.

setRangeTo void SparseArray::set_range_to(bool value, int low_bit, int size); Description: Sets the indicated range of bits to either on or off.