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slightly better memset/memcpy implementation

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Andrew Kelley 2017-05-02 19:20:23 -04:00
parent f87be94f6a
commit 3b921afc69
1 changed files with 2 additions and 11 deletions
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13
std/special/builtin.zig
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@ -9,26 +9,17 @@ const builtin = @import("builtin");
export fn memset(dest: ?&u8, c: u8, n: usize) { export fn memset(dest: ?&u8, c: u8, n: usize) {
@setDebugSafety(this, false); @setDebugSafety(this, false);
if (n == 0)
return;
const d = ??dest;
var index: usize = 0; var index: usize = 0;
while (index != n; index += 1) while (index != n; index += 1)
d[index] = c; (??dest)[index] = c;
} }
export fn memcpy(noalias dest: ?&u8, noalias src: ?&const u8, n: usize) { export fn memcpy(noalias dest: ?&u8, noalias src: ?&const u8, n: usize) {
@setDebugSafety(this, false); @setDebugSafety(this, false);
if (n == 0)
return;
const d = ??dest;
const s = ??src;
var index: usize = 0; var index: usize = 0;
while (index != n; index += 1) while (index != n; index += 1)
d[index] = s[index]; (??dest)[index] = (??src)[index];
} }
export fn __stack_chk_fail() { export fn __stack_chk_fail() {