Meg's Code Collection

lib/zig/extras

1	const std = @import("std");
2	const string = []const u8;
3	const extras = @import("./lib.zig");
4	const builtin = @import("builtin");
5	const native_endian = builtin.target.cpu.arch.endian();
6
7	pub fn rawInt(comptime T: type, comptime literal: comptime_int) T {
8	comptime std.debug.assert(@typeInfo(T).int.bits % 8 == 0);
9	return switch (native_endian) {
10	.little => @byteSwap(@as(T, literal)),
11	.big => @compileError("unreachable"),
12	};
13	}
14
15	test {
16	const bytes = std.mem.toBytes(rawInt(u16, 0x4e5a));
17	try std.testing.expect(bytes[0] == 0x4e);
18	}
19	test {
20	const bytes = std.mem.toBytes(rawInt(u16, 0x4e5a));
21	try std.testing.expect(bytes[0] == 0x4e);
22	try std.testing.expect(bytes[1] == 0x5a);
23	}
24	test {
25	const bytes = std.mem.toBytes(rawInt(u32, 0x4e5a7da9));
26	try std.testing.expect(bytes[0] == 0x4e);
27	try std.testing.expect(bytes[1] == 0x5a);
28	try std.testing.expect(bytes[2] == 0x7d);
29	try std.testing.expect(bytes[3] == 0xa9);
30	}
31	test {
32	const bytes = std.mem.toBytes(rawInt(u64, 0x4e5a7da9f3f1d132));
33	try std.testing.expect(bytes[0] == 0x4e);
34	try std.testing.expect(bytes[1] == 0x5a);
35	try std.testing.expect(bytes[2] == 0x7d);
36	try std.testing.expect(bytes[3] == 0xa9);
37	try std.testing.expect(bytes[4] == 0xf3);
38	try std.testing.expect(bytes[5] == 0xf1);
39	try std.testing.expect(bytes[6] == 0xd1);
40	try std.testing.expect(bytes[7] == 0x32);
41	}