55 lines
2.7 KiB
Rust
55 lines
2.7 KiB
Rust
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#![warn(clippy::unsafe_sizeof_count_copies)]
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use std::mem::{size_of, size_of_val};
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use std::ptr::{copy, copy_nonoverlapping};
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fn main() {
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const SIZE: usize = 128;
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const HALF_SIZE: usize = SIZE / 2;
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const DOUBLE_SIZE: usize = SIZE * 2;
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let mut x = [2u8; SIZE];
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let mut y = [2u8; SIZE];
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// Count is size_of (Should trigger the lint)
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unsafe { copy_nonoverlapping::<u8>(x.as_ptr(), y.as_mut_ptr(), size_of::<u8>()) };
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unsafe { copy_nonoverlapping(x.as_ptr(), y.as_mut_ptr(), size_of_val(&x[0])) };
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unsafe { copy(x.as_ptr(), y.as_mut_ptr(), size_of::<u8>()) };
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unsafe { copy(x.as_ptr(), y.as_mut_ptr(), size_of_val(&x[0])) };
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// Count expression involving multiplication of size_of (Should trigger the lint)
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unsafe { copy_nonoverlapping(x.as_ptr(), y.as_mut_ptr(), size_of::<u8>() * SIZE) };
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unsafe { copy_nonoverlapping(x.as_ptr(), y.as_mut_ptr(), size_of_val(&x[0]) * SIZE) };
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unsafe { copy(x.as_ptr(), y.as_mut_ptr(), size_of::<u8>() * SIZE) };
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unsafe { copy(x.as_ptr(), y.as_mut_ptr(), size_of_val(&x[0]) * SIZE) };
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// Count expression involving nested multiplications of size_of (Should trigger the lint)
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unsafe { copy_nonoverlapping(x.as_ptr(), y.as_mut_ptr(), size_of::<u8>() * HALF_SIZE * 2) };
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unsafe { copy_nonoverlapping(x.as_ptr(), y.as_mut_ptr(), HALF_SIZE * size_of_val(&x[0]) * 2) };
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unsafe { copy(x.as_ptr(), y.as_mut_ptr(), size_of::<u8>() * SIZE * HALF_SIZE) };
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unsafe { copy(x.as_ptr(), y.as_mut_ptr(), size_of_val(&x[0]) * HALF_SIZE * 2) };
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// Count expression involving divisions of size_of (Should trigger the lint)
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unsafe { copy_nonoverlapping(x.as_ptr(), y.as_mut_ptr(), size_of::<u8>() * DOUBLE_SIZE / 2) };
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unsafe { copy_nonoverlapping(x.as_ptr(), y.as_mut_ptr(), DOUBLE_SIZE / 2 * size_of_val(&x[0])) };
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unsafe { copy(x.as_ptr(), y.as_mut_ptr(), DOUBLE_SIZE * size_of::<u8>() / 2) };
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unsafe { copy(x.as_ptr(), y.as_mut_ptr(), size_of_val(&x[0]) * DOUBLE_SIZE / 2) };
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// No size_of calls (Should not trigger the lint)
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unsafe { copy_nonoverlapping(x.as_ptr(), y.as_mut_ptr(), SIZE) };
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unsafe { copy_nonoverlapping(x.as_ptr(), y.as_mut_ptr(), SIZE) };
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unsafe { copy(x.as_ptr(), y.as_mut_ptr(), SIZE) };
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unsafe { copy(x.as_ptr(), y.as_mut_ptr(), SIZE) };
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// Different types for pointee and size_of (Should not trigger the lint)
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unsafe { copy_nonoverlapping(x.as_ptr(), y.as_mut_ptr(), size_of::<u16>() / 2 * SIZE) };
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unsafe { copy_nonoverlapping(x.as_ptr(), y.as_mut_ptr(), size_of_val(&0u16) / 2 * SIZE) };
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unsafe { copy(x.as_ptr(), y.as_mut_ptr(), size_of::<u16>() / 2 * SIZE) };
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unsafe { copy(x.as_ptr(), y.as_mut_ptr(), size_of_val(&0u16) / 2 * SIZE) };
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}
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