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Merge pull request #682 from zig-lang/fix-endian

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Fix endian swap parameters
This commit is contained in:
Andrew Kelley 2018-01-11 02:51:17 -05:00 committed by GitHub
commit 465e75bc5a
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1 changed files with 8 additions and 3 deletions
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11
std/endian.zig
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@ -2,11 +2,11 @@ const mem = @import("mem.zig");
const builtin = @import("builtin");
pub fn swapIfLe(comptime T: type, x: T) -> T {
return swapIf(false, T, x);
return swapIf(builtin.Endian.Little, T, x);
}
pub fn swapIfBe(comptime T: type, x: T) -> T {
return swapIf(true, T, x);
return swapIf(builtin.Endian.Big, T, x);
}
pub fn swapIf(endian: builtin.Endian, comptime T: type, x: T) -> T {
@ -15,6 +15,11 @@ pub fn swapIf(endian: builtin.Endian, comptime T: type, x: T) -> T {
pub fn swap(comptime T: type, x: T) -> T {
var buf: [@sizeOf(T)]u8 = undefined;
mem.writeInt(buf[0..], x, false);
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);
}