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AK: Add BitmapView::set_range_and_verify_that_all_bits_flip()
This function sets a range of bits to the same value while also verifying that all bits in the range get flipped in the process.
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c268df79e6
Notes:
sideshowbarker
2024-07-18 20:37:52 +09:00
Author: https://github.com/awesomekling Commit: https://github.com/SerenityOS/serenity/commit/c268df79e6a
@ -129,7 +129,7 @@ public:
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}
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template<bool VALUE>
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void set_range(size_t start, size_t len) { return view().set_range<VALUE>(start, len); }
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void set_range(size_t start, size_t len) { return view().set_range<VALUE, false>(start, len); }
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void set_range(size_t start, size_t len, bool value) { return view().set_range(start, len, value); }
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void fill(bool value) { view().fill(value); }
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@ -115,7 +115,7 @@ public:
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u8* data() { return m_data; }
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const u8* data() const { return m_data; }
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template<bool VALUE>
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template<bool VALUE, bool verify_that_all_bits_flip>
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void set_range(size_t start, size_t len)
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{
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VERIFY(start < m_size);
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@ -131,16 +131,37 @@ public:
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u8 byte_mask = bitmask_first_byte[start % 8];
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if (first == last) {
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byte_mask &= bitmask_last_byte[(start + len) % 8];
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if constexpr (verify_that_all_bits_flip) {
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if constexpr (VALUE) {
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VERIFY((*first & byte_mask) == 0);
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} else {
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VERIFY((*first & byte_mask) == byte_mask);
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}
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}
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if constexpr (VALUE)
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*first |= byte_mask;
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else
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*first &= ~byte_mask;
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} else {
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if constexpr (verify_that_all_bits_flip) {
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if constexpr (VALUE) {
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VERIFY((*first & byte_mask) == 0);
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} else {
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VERIFY((*first & byte_mask) == byte_mask);
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}
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}
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if constexpr (VALUE)
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*first |= byte_mask;
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else
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*first &= ~byte_mask;
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byte_mask = bitmask_last_byte[(start + len) % 8];
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if constexpr (verify_that_all_bits_flip) {
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if constexpr (VALUE) {
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VERIFY((*last & byte_mask) == 0);
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} else {
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VERIFY((*last & byte_mask) == byte_mask);
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}
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}
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if constexpr (VALUE)
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*last |= byte_mask;
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else
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@ -157,9 +178,17 @@ public:
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void set_range(size_t start, size_t len, bool value)
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{
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if (value)
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set_range<true>(start, len);
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set_range<true, false>(start, len);
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else
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set_range<false>(start, len);
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set_range<false, false>(start, len);
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}
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void set_range_and_verify_that_all_bits_flip(size_t start, size_t len, bool value)
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{
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if (value)
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set_range<true, true>(start, len);
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else
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set_range<false, true>(start, len);
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}
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void fill(bool value)
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