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classlib: improve range checks for BitSet (#820)

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Ivan Hetman 2023-10-13 22:04:00 +03:00 committed by GitHub
parent 82cd9d9cdf
commit 4e9d89b669
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 23 additions and 5 deletions
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28
classlib/src/main/java/org/teavm/classlib/java/util/TBitSet.java
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@ -33,10 +33,13 @@ public class TBitSet extends TObject implements TCloneable, TSerializable {
} }
public TBitSet() { public TBitSet() {
data = new int[0]; data = new int[2];
} }
public TBitSet(int nbits) { public TBitSet(int nbits) {
if (nbits < 0) {
throw new NegativeArraySizeException();
}
data = new int[(nbits + TInteger.SIZE - 1) / TInteger.SIZE]; data = new int[(nbits + TInteger.SIZE - 1) / TInteger.SIZE];
} }
@ -123,7 +126,7 @@ public class TBitSet extends TObject implements TCloneable, TSerializable {
} }
public void flip(int fromIndex, int toIndex) { public void flip(int fromIndex, int toIndex) {
if (fromIndex > toIndex) { if (fromIndex < 0 || fromIndex > toIndex) {
throw new TIndexOutOfBoundsException(); throw new TIndexOutOfBoundsException();
} }
int fromDataIndex = fromIndex / 32; int fromDataIndex = fromIndex / 32;
@ -149,6 +152,9 @@ public class TBitSet extends TObject implements TCloneable, TSerializable {
} }
public void set(int bitIndex) { public void set(int bitIndex) {
if (bitIndex < 0) {
throw new IndexOutOfBoundsException();
}
int index = bitIndex / 32; int index = bitIndex / 32;
if (bitIndex >= length) { if (bitIndex >= length) {
ensureCapacity(index + 1); ensureCapacity(index + 1);
@ -166,7 +172,7 @@ public class TBitSet extends TObject implements TCloneable, TSerializable {
} }
public void set(int fromIndex, int toIndex) { public void set(int fromIndex, int toIndex) {
if (fromIndex > toIndex) { if (fromIndex < 0 || fromIndex > toIndex) {
throw new TIndexOutOfBoundsException(); throw new TIndexOutOfBoundsException();
} }
if (fromIndex == toIndex) { if (fromIndex == toIndex) {
@ -210,6 +216,9 @@ public class TBitSet extends TObject implements TCloneable, TSerializable {
} }
public void clear(int bitIndex) { public void clear(int bitIndex) {
if (bitIndex < 0) {
throw new IndexOutOfBoundsException();
}
int index = bitIndex / 32; int index = bitIndex / 32;
if (index < data.length) { if (index < data.length) {
data[index] &= TInteger.rotateLeft(0xFFFFFFFE, bitIndex % 32); data[index] &= TInteger.rotateLeft(0xFFFFFFFE, bitIndex % 32);
@ -220,7 +229,7 @@ public class TBitSet extends TObject implements TCloneable, TSerializable {
} }
public void clear(int fromIndex, int toIndex) { public void clear(int fromIndex, int toIndex) {
if (fromIndex > toIndex) { if (fromIndex < 0 || fromIndex > toIndex) {
throw new TIndexOutOfBoundsException(); throw new TIndexOutOfBoundsException();
} }
if (fromIndex >= length) { if (fromIndex >= length) {
@ -252,12 +261,15 @@ public class TBitSet extends TObject implements TCloneable, TSerializable {
} }
public boolean get(int bitIndex) { public boolean get(int bitIndex) {
if (bitIndex < 0) {
throw new IndexOutOfBoundsException();
}
int index = bitIndex / 32; int index = bitIndex / 32;
return index < data.length && (data[index] & (1 << (bitIndex % 32))) != 0; return index < data.length && (data[index] & (1 << (bitIndex % 32))) != 0;
} }
public TBitSet get(int fromIndex, int toIndex) { public TBitSet get(int fromIndex, int toIndex) {
if (fromIndex > toIndex) { if (fromIndex < 0 || fromIndex > toIndex) {
throw new TIndexOutOfBoundsException(); throw new TIndexOutOfBoundsException();
} }
if (toIndex > length) { if (toIndex > length) {
@ -292,6 +304,9 @@ public class TBitSet extends TObject implements TCloneable, TSerializable {
} }
public int nextSetBit(int fromIndex) { public int nextSetBit(int fromIndex) {
if (fromIndex < 0) {
throw new IndexOutOfBoundsException();
}
if (fromIndex >= length) { if (fromIndex >= length) {
return -1; return -1;
} }
@ -311,6 +326,9 @@ public class TBitSet extends TObject implements TCloneable, TSerializable {
} }
public int nextClearBit(int fromIndex) { public int nextClearBit(int fromIndex) {
if (fromIndex < 0) {
throw new IndexOutOfBoundsException();
}
if (fromIndex >= length) { if (fromIndex >= length) {
return fromIndex; return fromIndex;
} }