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memset and memcpy implementations need not return dest

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This commit is contained in:
Andrew Kelley 2017-02-04 23:04:07 -05:00
parent 64a0510205
commit e56f903522
1 changed files with 8 additions and 8 deletions
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16
std/builtin.zig
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@ -1,31 +1,31 @@
// These functions are provided when not linking against libc because LLVM // These functions are provided when not linking against libc because LLVM
// sometimes generates code that calls them. // sometimes generates code that calls them.
export fn memset(dest: ?&u8, c: u8, n: usize) -> ?&u8 { // 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); @setDebugSafety(this, false);
if (n == 0) if (n == 0)
return dest; return;
const d = ??dest; const d = ??dest;
var index: usize = 0; var index: usize = 0;
while (index != n; index += 1) while (index != n; index += 1)
d[index] = c; d[index] = c;
return dest;
} }
export fn memcpy(noalias dest: ?&u8, noalias src: ?&const u8, n: usize) -> ?&u8 { export fn memcpy(noalias dest: ?&u8, noalias src: ?&const u8, n: usize) {
@setDebugSafety(this, false); @setDebugSafety(this, false);
if (n == 0) if (n == 0)
return dest; return;
const d = ??dest; const d = ??dest;
const s = ??src; 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]; d[index] = s[index];
return dest;
} }