26 lines
692 B
Zig
26 lines
692 B
Zig
const mem = @import("mem.zig");
|
|
const builtin = @import("builtin");
|
|
|
|
pub fn swapIfLe(comptime T: type, x: T) T {
|
|
return swapIf(builtin.Endian.Little, T, x);
|
|
}
|
|
|
|
pub fn swapIfBe(comptime T: type, x: T) T {
|
|
return swapIf(builtin.Endian.Big, T, x);
|
|
}
|
|
|
|
pub fn swapIf(endian: builtin.Endian, comptime T: type, x: T) T {
|
|
return if (builtin.endian == endian) swap(T, x) else x;
|
|
}
|
|
|
|
pub fn swap(comptime T: type, x: T) T {
|
|
var buf: [@sizeOf(T)]u8 = undefined;
|
|
mem.writeInt(buf[0..], x, builtin.Endian.Little);
|
|
return mem.readInt(buf, T, builtin.Endian.Big);
|
|
}
|
|
|
|
test "swap" {
|
|
const debug = @import("debug/index.zig");
|
|
debug.assert(swap(u32, 0xDEADBEEF) == 0xEFBEADDE);
|
|
}
|