zig/std/special/builtin.zig

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Zig

// These functions are provided when not linking against libc because LLVM
// sometimes generates code that calls them.
// Note that these functions do not return `dest`, like the libc API.
// The semantics of these functions is dictated by the corresponding
// LLVM intrinsics, not by the libc API.
export fn memset(dest: ?&u8, c: u8, n: usize) {
@setDebugSafety(this, false);
if (n == 0)
return;
const d = ??dest;
var index: usize = 0;
while (index != n; index += 1)
d[index] = c;
}
export fn memcpy(noalias dest: ?&u8, noalias src: ?&const u8, n: usize) {
@setDebugSafety(this, false);
if (n == 0)
return;
const d = ??dest;
const s = ??src;
var index: usize = 0;
while (index != n; index += 1)
d[index] = s[index];
}
export fn __stack_chk_fail() {
@panic("stack smashing detected");
}