const std = @import("std"); const Log2Int = std.math.Log2Int; pub inline fn sext(comptime bits: comptime_int, value: u32) u32 { comptime std.debug.assert(bits <= 32); const amount = 32 - bits; return @bitCast(u32, @bitCast(i32, value << amount) >> amount); } /// See https://godbolt.org/z/W3en9Eche pub inline fn rotr(comptime T: type, value: T, r: anytype) T { comptime std.debug.assert(@typeInfo(T).Int.signedness == .unsigned); const ar = @truncate(Log2Int(T), r); return value >> ar | value << @truncate(Log2Int(T), @typeInfo(T).Int.bits - @as(T, ar)); } pub const FpsAverage = struct { const Self = @This(); total: u64, sample_count: u64, pub fn init() Self { return .{ .total = 0, .sample_count = 1 }; } pub fn add(self: *Self, sample: u64) void { if (self.sample_count == 600) return self.reset(sample); self.total += sample; self.sample_count += 1; } pub fn calc(self: *const Self) u64 { return self.total / self.sample_count; } fn reset(self: *Self, sample: u64) void { self.total = sample; self.sample_count = 1; } }; pub fn intToBytes(comptime T: type, value: anytype) [@sizeOf(T)]u8 { comptime std.debug.assert(@typeInfo(T) == .Int); var result: [@sizeOf(T)]u8 = undefined; var i: Log2Int(T) = 0; while (i < result.len) : (i += 1) result[i] = @truncate(u8, value >> i * @bitSizeOf(u8)); return result; }