Package com.itextpdf.text.pdf.qrcode
Class BitArray
java.lang.Object
com.itextpdf.text.pdf.qrcode.BitArray
A simple, fast array of bits, represented compactly by an array of ints internally.
- Since:
- 5.0.2
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
clear()
Clears all bits (sets to false).void
flip
(int i) Flips bit i.boolean
get
(int i) int[]
int
getSize()
boolean
isRange
(int start, int end, boolean value) Efficient method to check if a range of bits is set, or not set.private static int[]
makeArray
(int size) void
reverse()
Reverses all bits in the array.void
set
(int i) Sets bit i.void
setBulk
(int i, int newBits) Sets a block of 32 bits, starting at bit i.toString()
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Field Details
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bits
public int[] bits -
size
public final int size
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Constructor Details
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BitArray
public BitArray(int size)
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Method Details
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getSize
public int getSize() -
get
public boolean get(int i) - Parameters:
i
- bit to get- Returns:
- true iff bit i is set
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set
public void set(int i) Sets bit i.- Parameters:
i
- bit to set
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flip
public void flip(int i) Flips bit i.- Parameters:
i
- bit to set
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setBulk
public void setBulk(int i, int newBits) Sets a block of 32 bits, starting at bit i.- Parameters:
i
- first bit to setnewBits
- the new value of the next 32 bits. Note again that the least-significant bit corresponds to bit i, the next-least-significant to i+1, and so on.
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clear
public void clear()Clears all bits (sets to false). -
isRange
public boolean isRange(int start, int end, boolean value) Efficient method to check if a range of bits is set, or not set.- Parameters:
start
- start of range, inclusive.end
- end of range, exclusivevalue
- if true, checks that bits in range are set, otherwise checks that they are not set- Returns:
- true iff all bits are set or not set in range, according to value argument
- Throws:
IllegalArgumentException
- if end is less than or equal to start
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getBitArray
public int[] getBitArray()- Returns:
- underlying array of ints. The first element holds the first 32 bits, and the least significant bit is bit 0.
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reverse
public void reverse()Reverses all bits in the array. -
makeArray
private static int[] makeArray(int size) -
toString
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