mirror of
https://code.blicky.net/yorhel/ncdu.git
synced 2026-01-13 09:18:40 -09:00
17 lines
600 B
Zig
17 lines
600 B
Zig
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const std = @import("std");
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pub fn saturateAdd(a: anytype, b: @TypeOf(a)) @TypeOf(a) {
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std.debug.assert(@typeInfo(@TypeOf(a)).Int.signedness == .unsigned);
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return std.math.add(@TypeOf(a), a, b) catch std.math.maxInt(@TypeOf(a));
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}
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pub fn saturateSub(a: anytype, b: @TypeOf(a)) @TypeOf(a) {
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std.debug.assert(@typeInfo(@TypeOf(a)).Int.signedness == .unsigned);
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return std.math.sub(@TypeOf(a), a, b) catch std.math.minInt(@TypeOf(a));
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}
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// Multiplies by 512, saturating.
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pub fn blocksToSize(b: u64) u64 {
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return if (b & 0xFF80000000000000 > 0) std.math.maxInt(u64) else b << 9;
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}
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