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docs: remove confusion about align[For|Back]ward

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This commit is contained in:
Jonas Gollenz 2022-08-24 01:35:45 +02:00 committed by Andrew Kelley
parent d8e22fcb20
commit 07afd5bdba
1 changed files with 5 additions and 5 deletions
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10
lib/std/mem.zig
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@ -3252,13 +3252,13 @@ test "sliceAsBytes preserves pointer attributes" {
try testing.expectEqual(in.alignment, out.alignment);
}
/// Round an address up to the nearest aligned address
/// Round an address up to the next (or current) aligned address.
/// The alignment must be a power of 2 and greater than 0.
pub fn alignForward(addr: usize, alignment: usize) usize {
return alignForwardGeneric(usize, addr, alignment);
}
/// Round an address up to the nearest aligned address
/// Round an address up to the next (or current) aligned address.
/// The alignment must be a power of 2 and greater than 0.
pub fn alignForwardGeneric(comptime T: type, addr: T, alignment: T) T {
return alignBackwardGeneric(T, addr + (alignment - 1), alignment);
@ -3290,7 +3290,7 @@ test "alignForward" {
try testing.expect(alignForward(17, 8) == 24);
}
/// Round an address up to the previous aligned address
/// Round an address down to the previous (or current) aligned address.
/// Unlike `alignBackward`, `alignment` can be any positive number, not just a power of 2.
pub fn alignBackwardAnyAlign(i: usize, alignment: usize) usize {
if (@popCount(alignment) == 1)
@ -3299,13 +3299,13 @@ pub fn alignBackwardAnyAlign(i: usize, alignment: usize) usize {
return i - @mod(i, alignment);
}
/// Round an address up to the previous aligned address
/// Round an address down to the previous (or current) aligned address.
/// The alignment must be a power of 2 and greater than 0.
pub fn alignBackward(addr: usize, alignment: usize) usize {
return alignBackwardGeneric(usize, addr, alignment);
}
/// Round an address up to the previous aligned address
/// Round an address down to the previous (or current) aligned address.
/// The alignment must be a power of 2 and greater than 0.
pub fn alignBackwardGeneric(comptime T: type, addr: T, alignment: T) T {
assert(@popCount(alignment) == 1);