74 lines
1.7 KiB
Zig
74 lines
1.7 KiB
Zig
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pub const CheckedArithmeticError = error {
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IntOverflow,
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};
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pub fn Float(comptime bits: comptime_int) type {
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return @Type(.{.Float = .{.bits = bits}});
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}
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pub fn Signed(comptime bits: comptime_int) type {
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return @Type(.{.Int = .{
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.signedness = .signed,
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.bits = bits,
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}});
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}
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pub fn Unsigned(comptime bits: comptime_int) type {
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return @Type(.{.Int = .{
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.signedness = .unsigned,
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.bits = bits,
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}});
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}
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pub const Vector2 = struct {
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x: f32,
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y: f32,
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pub const zero = Vector2{.x = 0, .y = 0};
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};
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pub fn checked_add(a: anytype, b: anytype) CheckedArithmeticError!@TypeOf(a + b) {
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const result = @addWithOverflow(a, b);
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if (result.@"1" != 0) return error.IntOverflow;
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return result.@"0";
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}
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pub fn checked_mul(a: anytype, b: anytype) CheckedArithmeticError!@TypeOf(a * b) {
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const result = @mulWithOverflow(a, b);
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if (result.@"1" != 0) return error.IntOverflow;
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return result.@"0";
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}
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pub fn checked_sub(a: anytype, b: anytype) CheckedArithmeticError!@TypeOf(a - b) {
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const result = @subWithOverflow(a, b);
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if (result.@"1" != 0) return error.IntOverflow;
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return result.@"0";
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}
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pub fn clamp(comptime Scalar: type, value: Scalar, min_value: Scalar, max_value: Scalar) Scalar {
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return max(Scalar, min_value, min(Scalar, max_value, value));
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}
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pub fn max(comptime Scalar: type, this: Scalar, that: Scalar) Scalar {
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return if (this > that) this else that;
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}
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pub fn max_int(comptime Int: type) Int {
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const info = @typeInfo(Int);
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const bit_count = info.Int.bits;
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if (bit_count == 0) return 0;
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return (1 << (bit_count - @boolToInt(info.Int.signedness == .signed))) - 1;
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}
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pub fn min(comptime Scalar: type, this: Scalar, that: Scalar) Scalar {
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return if (this < that) this else that;
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}
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