50 lines
1.6 KiB
Zig
50 lines
1.6 KiB
Zig
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const std = @import("std");
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const fmt = std.fmt;
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pub const RGB = struct {
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r: u8,
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g: u8,
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b: u8,
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pub fn init(comptime string: []const u8) !RGB {
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std.debug.assert(string.len == 6 or string.len == 7);
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comptime var index: usize = 0;
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if (string[0] == '#') index += 1;
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return .{
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.r = try fmt.parseInt(u8, string[index .. index + 2], 16),
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.g = try fmt.parseInt(u8, string[index + 2 .. index + 4], 16),
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.b = try fmt.parseInt(u8, string[index + 4 .. index + 6], 16),
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};
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}
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};
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// pub const Default256 = [_]RGB{
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// RGB{ .r = 0, .g = 0, .b = 0 },
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// RGB{ .r = 204, .g = 4, .b = 3 },
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// RGB{ .r = 25, .g = 203, .b = 0 },
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// RGB{ .r = 206, .g = 203, .b = 0 },
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// RGB{ .r = 13, .g = 115, .b = 204 },
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// RGB{ .r = 203, .g = 30, .b = 209 },
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// RGB{ .r = 13, .g = 205, .b = 205 },
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// RGB{ .r = 221, .g = 221, .b = 221 },
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// };
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test "RGB init from string" {
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const red = try RGB.init("#ff0000");
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try std.testing.expectEqual(0xff, red.r);
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try std.testing.expectEqual(0x00, red.g);
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try std.testing.expectEqual(0x00, red.b);
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const green = try RGB.init("00ff00");
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try std.testing.expectEqual(0x00, green.r);
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try std.testing.expectEqual(0xff, green.g);
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try std.testing.expectEqual(0x00, green.b);
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const blue = try RGB.init("#0000ff");
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try std.testing.expectEqual(0x00, blue.r);
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try std.testing.expectEqual(0x00, blue.g);
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try std.testing.expectEqual(0xff, blue.b);
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try std.testing.expectError(fmt.ParseIntError.InvalidCharacter, RGB.init("xyzxyz"));
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}
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