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const std = @import("std");
const builtin = @import("builtin");
const expect = std.testing.expect;
test "@memset on array pointers" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_wasm) {
// TODO: implement memset when element ABI size > 1
return error.SkipZigTest;
}
try testMemsetArray();
try comptime testMemsetArray();
}
fn testMemsetArray() !void {
{
// memset array to non-undefined, ABI size == 1
var foo: [20]u8 = undefined;
@memset(&foo, 'A');
try expect(foo[0] == 'A');
try expect(foo[11] == 'A');
try expect(foo[19] == 'A');
}
{
// memset array to non-undefined, ABI size > 1
var foo: [20]u32 = undefined;
@memset(&foo, 1234);
try expect(foo[0] == 1234);
try expect(foo[11] == 1234);
try expect(foo[19] == 1234);
}
}
test "@memset on slices" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_wasm) {
// TODO: implement memset when element ABI size > 1
// TODO: implement memset on slices
return error.SkipZigTest;
}
try testMemsetSlice();
try comptime testMemsetSlice();
}
fn testMemsetSlice() !void {
{
// memset slice to non-undefined, ABI size == 1
var array: [20]u8 = undefined;
var len = array.len;
var slice = array[0..len];
@memset(slice, 'A');
try expect(slice[0] == 'A');
try expect(slice[11] == 'A');
try expect(slice[19] == 'A');
}
{
// memset slice to non-undefined, ABI size > 1
var array: [20]u32 = undefined;
var len = array.len;
var slice = array[0..len];
@memset(slice, 1234);
try expect(slice[0] == 1234);
try expect(slice[11] == 1234);
try expect(slice[19] == 1234);
}
}
test "memset with bool element" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
var buf: [5]bool = undefined;
@memset(&buf, true);
try expect(buf[2]);
try expect(buf[4]);
}
test "memset with 1-byte struct element" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
const S = struct { x: bool };
var buf: [5]S = undefined;
@memset(&buf, .{ .x = true });
try expect(buf[2].x);
try expect(buf[4].x);
}
test "memset with 1-byte array element" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
const A = [1]bool;
var buf: [5]A = undefined;
@memset(&buf, .{true});
try expect(buf[2][0]);
try expect(buf[4][0]);
}
test "memset with large array element, runtime known" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
const A = [128]u64;
var buf: [5]A = undefined;
var runtime_known_element = [_]u64{0} ** 128;
@memset(&buf, runtime_known_element);
for (buf[0]) |elem| try expect(elem == 0);
for (buf[1]) |elem| try expect(elem == 0);
for (buf[2]) |elem| try expect(elem == 0);
for (buf[3]) |elem| try expect(elem == 0);
for (buf[4]) |elem| try expect(elem == 0);
}
test "memset with large array element, comptime known" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
const A = [128]u64;
var buf: [5]A = undefined;
const comptime_known_element = [_]u64{0} ** 128;
@memset(&buf, comptime_known_element);
for (buf[0]) |elem| try expect(elem == 0);
for (buf[1]) |elem| try expect(elem == 0);
for (buf[2]) |elem| try expect(elem == 0);
for (buf[3]) |elem| try expect(elem == 0);
for (buf[4]) |elem| try expect(elem == 0);
}
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