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https://github.com/zeek/zeek.git
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f5a76c1aed
This largely copies over Spicy's `.clang-format` configuration file. The one place where we deviate is header include order since Zeek depends on headers being included in a certain order.
58 lines
1.2 KiB
C++
58 lines
1.2 KiB
C++
// A simple but fast data structure for sets of integers.
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// Only supported operations are insert, remove and membership test.
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//
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// It's implemented via a bitmap so the memory usage increases linearly
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// with max(set).
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#pragma once
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#include <cstring>
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namespace zeek::detail {
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class IntSet {
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public:
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// n is a hint for the value of the largest integer.
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explicit IntSet(unsigned int n = 1);
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~IntSet();
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void Insert(unsigned int i);
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void Remove(unsigned int i);
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bool Contains(unsigned int i) const;
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void Clear();
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private:
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void Expand(unsigned int i);
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unsigned int size;
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unsigned char* set;
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};
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inline IntSet::IntSet(unsigned int n) {
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size = n / 8 + 1;
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set = new unsigned char[size];
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memset(set, 0, size);
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}
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inline IntSet::~IntSet() { delete[] set; }
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inline void IntSet::Insert(unsigned int i) {
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if ( i / 8 >= size )
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Expand(i);
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set[i / 8] |= (1 << (i % 8));
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}
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inline void IntSet::Remove(unsigned int i) {
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if ( i / 8 >= size )
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Expand(i);
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else
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set[i / 8] &= ~(1 << (i % 8));
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}
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inline bool IntSet::Contains(unsigned int i) const { return i / 8 < size ? set[i / 8] & (1 << (i % 8)) : false; }
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inline void IntSet::Clear() { memset(set, 0, size); }
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} // namespace zeek::detail
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