| 1 | const std = @import("std"); |
| 2 | const testing = std.testing; |
| 3 | const builtin = @import("builtin"); |
| 4 | |
| 5 | fn add(count: c_int, ...) callconv(.c) c_int { |
| 6 | var ap = @cVaStart(); |
| 7 | defer @cVaEnd(&ap); |
| 8 | var i: usize = 0; |
| 9 | var sum: c_int = 0; |
| 10 | while (i < count) : (i += 1) { |
| 11 | sum += @cVaArg(&ap, c_int); |
| 12 | } |
| 13 | return sum; |
| 14 | } |
| 15 | |
| 16 | test "defining a variadic function" { |
| 17 | if (builtin.cpu.arch == .aarch64 and builtin.os.tag != .macos) { |
| 18 | // https://github.com/ziglang/zig/issues/14096 |
| 19 | return error.SkipZigTest; |
| 20 | } |
| 21 | if (builtin.cpu.arch == .x86_64 and builtin.os.tag == .windows) { |
| 22 | // https://github.com/ziglang/zig/issues/16961 |
| 23 | return error.SkipZigTest; |
| 24 | } |
| 25 | if (builtin.cpu.arch == .s390x) { |
| 26 | // https://github.com/ziglang/zig/issues/21350#issuecomment-3543006475 |
| 27 | return error.SkipZigTest; |
| 28 | } |
| 29 | |
| 30 | try std.testing.expectEqual(@as(c_int, 0), add(0)); |
| 31 | try std.testing.expectEqual(@as(c_int, 1), add(1, @as(c_int, 1))); |
| 32 | try std.testing.expectEqual(@as(c_int, 3), add(2, @as(c_int, 1), @as(c_int, 2))); |
| 33 | } |
| 34 | |
| 35 | // test |