//! Tests for the C ABI. //! Those tests are passing back and forth struct and values across C ABI //! by combining Zig code here and its mirror in cfunc.c //! To run all the tests on the tier 1 architecture you can use: //! zig build test-c-abi -fqemu //! To run the tests on a specific architecture: //! zig test -fno-stage1 -lc main.zig cfuncs.c -target mips-linux --test-cmd qemu-mips --test-cmd-bin const std = @import("std"); const builtin = @import("builtin"); const print = std.debug.print; const expect = std.testing.expect; const expectEqual = std.testing.expectEqual; const has_i128 = builtin.cpu.arch != .x86 and !builtin.cpu.arch.isARM() and !builtin.cpu.arch.isMIPS() and !builtin.cpu.arch.isPPC(); extern fn run_c_tests() void; export fn zig_panic() noreturn { @panic("zig_panic called from C"); } test "C importing Zig ABI Tests" { run_c_tests(); } extern fn c_u8(u8) void; extern fn c_u16(u16) void; extern fn c_u32(u32) void; extern fn c_u64(u64) void; extern fn c_struct_u128(U128) void; extern fn c_i8(i8) void; extern fn c_i16(i16) void; extern fn c_i32(i32) void; extern fn c_i64(i64) void; extern fn c_struct_i128(I128) void; // On windows x64, the first 4 are passed via registers, others on the stack. extern fn c_five_integers(i32, i32, i32, i32, i32) void; export fn zig_five_integers(a: i32, b: i32, c: i32, d: i32, e: i32) void { expect(a == 12) catch @panic("test failure: zig_five_integers 12"); expect(b == 34) catch @panic("test failure: zig_five_integers 34"); expect(c == 56) catch @panic("test failure: zig_five_integers 56"); expect(d == 78) catch @panic("test failure: zig_five_integers 78"); expect(e == 90) catch @panic("test failure: zig_five_integers 90"); } test "C ABI integers" { c_u8(0xff); c_u16(0xfffe); c_u32(0xfffffffd); c_u64(0xfffffffffffffffc); if (has_i128) c_struct_u128(.{ .value = 0xfffffffffffffffc }); c_i8(-1); c_i16(-2); c_i32(-3); c_i64(-4); if (has_i128) c_struct_i128(.{ .value = -6 }); c_five_integers(12, 34, 56, 78, 90); } export fn zig_u8(x: u8) void { expect(x == 0xff) catch @panic("test failure: zig_u8"); } export fn zig_u16(x: u16) void { expect(x == 0xfffe) catch @panic("test failure: zig_u16"); } export fn zig_u32(x: u32) void { expect(x == 0xfffffffd) catch @panic("test failure: zig_u32"); } export fn zig_u64(x: u64) void { expect(x == 0xfffffffffffffffc) catch @panic("test failure: zig_u64"); } export fn zig_i8(x: i8) void { expect(x == -1) catch @panic("test failure: zig_i8"); } export fn zig_i16(x: i16) void { expect(x == -2) catch @panic("test failure: zig_i16"); } export fn zig_i32(x: i32) void { expect(x == -3) catch @panic("test failure: zig_i32"); } export fn zig_i64(x: i64) void { expect(x == -4) catch @panic("test failure: zig_i64"); } const I128 = extern struct { value: i128, }; const U128 = extern struct { value: u128, }; export fn zig_struct_i128(a: I128) void { expect(a.value == -6) catch @panic("test failure: zig_struct_i128"); } export fn zig_struct_u128(a: U128) void { expect(a.value == 0xfffffffffffffffc) catch @panic("test failure: zig_struct_u128"); } extern fn c_f32(f32) void; extern fn c_f64(f64) void; extern fn c_long_double(c_longdouble) void; // On windows x64, the first 4 are passed via registers, others on the stack. extern fn c_five_floats(f32, f32, f32, f32, f32) void; export fn zig_five_floats(a: f32, b: f32, c: f32, d: f32, e: f32) void { expect(a == 1.0) catch @panic("test failure: zig_five_floats 1.0"); expect(b == 2.0) catch @panic("test failure: zig_five_floats 2.0"); expect(c == 3.0) catch @panic("test failure: zig_five_floats 3.0"); expect(d == 4.0) catch @panic("test failure: zig_five_floats 4.0"); expect(e == 5.0) catch @panic("test failure: zig_five_floats 5.0"); } test "C ABI floats" { c_f32(12.34); c_f64(56.78); c_five_floats(1.0, 2.0, 3.0, 4.0, 5.0); } test "C ABI long double" { if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; c_long_double(12.34); } export fn zig_f32(x: f32) void { expect(x == 12.34) catch @panic("test failure: zig_f32"); } export fn zig_f64(x: f64) void { expect(x == 56.78) catch @panic("test failure: zig_f64"); } export fn zig_longdouble(x: c_longdouble) void { if (!builtin.cpu.arch.isWasm()) return; // waiting for #1481 expect(x == 12.34) catch @panic("test failure: zig_longdouble"); } extern fn c_ptr(*anyopaque) void; test "C ABI pointer" { c_ptr(@intToPtr(*anyopaque, 0xdeadbeef)); } export fn zig_ptr(x: *anyopaque) void { expect(@ptrToInt(x) == 0xdeadbeef) catch @panic("test failure: zig_ptr"); } extern fn c_bool(bool) void; test "C ABI bool" { c_bool(true); } export fn zig_bool(x: bool) void { expect(x) catch @panic("test failure: zig_bool"); } // TODO: Replace these with the correct types once we resolve // https://github.com/ziglang/zig/issues/8465 // // For now, we have no way of referring to the _Complex C types from Zig, // so our ABI is unavoidably broken on some platforms (such as x86) const ComplexFloat = extern struct { real: f32, imag: f32, }; const ComplexDouble = extern struct { real: f64, imag: f64, }; // Note: These two functions match the signature of __mulsc3 and __muldc3 in compiler-rt (and libgcc) extern fn c_cmultf_comp(a_r: f32, a_i: f32, b_r: f32, b_i: f32) ComplexFloat; extern fn c_cmultd_comp(a_r: f64, a_i: f64, b_r: f64, b_i: f64) ComplexDouble; extern fn c_cmultf(a: ComplexFloat, b: ComplexFloat) ComplexFloat; extern fn c_cmultd(a: ComplexDouble, b: ComplexDouble) ComplexDouble; const complex_abi_compatible = builtin.cpu.arch != .x86 and !builtin.cpu.arch.isMIPS() and !builtin.cpu.arch.isARM() and !builtin.cpu.arch.isPPC() and !builtin.cpu.arch.isRISCV(); test "C ABI complex float" { if (!complex_abi_compatible) return error.SkipZigTest; if (builtin.cpu.arch == .x86_64) return error.SkipZigTest; // See https://github.com/ziglang/zig/issues/8465 const a = ComplexFloat{ .real = 1.25, .imag = 2.6 }; const b = ComplexFloat{ .real = 11.3, .imag = -1.5 }; const z = c_cmultf(a, b); try expect(z.real == 1.5); try expect(z.imag == 13.5); } test "C ABI complex float by component" { if (!complex_abi_compatible) return error.SkipZigTest; const a = ComplexFloat{ .real = 1.25, .imag = 2.6 }; const b = ComplexFloat{ .real = 11.3, .imag = -1.5 }; const z2 = c_cmultf_comp(a.real, a.imag, b.real, b.imag); try expect(z2.real == 1.5); try expect(z2.imag == 13.5); } test "C ABI complex double" { if (!complex_abi_compatible) return error.SkipZigTest; const a = ComplexDouble{ .real = 1.25, .imag = 2.6 }; const b = ComplexDouble{ .real = 11.3, .imag = -1.5 }; const z = c_cmultd(a, b); try expect(z.real == 1.5); try expect(z.imag == 13.5); } test "C ABI complex double by component" { if (!complex_abi_compatible) return error.SkipZigTest; const a = ComplexDouble{ .real = 1.25, .imag = 2.6 }; const b = ComplexDouble{ .real = 11.3, .imag = -1.5 }; const z = c_cmultd_comp(a.real, a.imag, b.real, b.imag); try expect(z.real == 1.5); try expect(z.imag == 13.5); } export fn zig_cmultf(a: ComplexFloat, b: ComplexFloat) ComplexFloat { expect(a.real == 1.25) catch @panic("test failure: zig_cmultf 1"); expect(a.imag == 2.6) catch @panic("test failure: zig_cmultf 2"); expect(b.real == 11.3) catch @panic("test failure: zig_cmultf 3"); expect(b.imag == -1.5) catch @panic("test failure: zig_cmultf 4"); return .{ .real = 1.5, .imag = 13.5 }; } export fn zig_cmultd(a: ComplexDouble, b: ComplexDouble) ComplexDouble { expect(a.real == 1.25) catch @panic("test failure: zig_cmultd 1"); expect(a.imag == 2.6) catch @panic("test failure: zig_cmultd 2"); expect(b.real == 11.3) catch @panic("test failure: zig_cmultd 3"); expect(b.imag == -1.5) catch @panic("test failure: zig_cmultd 4"); return .{ .real = 1.5, .imag = 13.5 }; } export fn zig_cmultf_comp(a_r: f32, a_i: f32, b_r: f32, b_i: f32) ComplexFloat { expect(a_r == 1.25) catch @panic("test failure: zig_cmultf_comp 1"); expect(a_i == 2.6) catch @panic("test failure: zig_cmultf_comp 2"); expect(b_r == 11.3) catch @panic("test failure: zig_cmultf_comp 3"); expect(b_i == -1.5) catch @panic("test failure: zig_cmultf_comp 4"); return .{ .real = 1.5, .imag = 13.5 }; } export fn zig_cmultd_comp(a_r: f64, a_i: f64, b_r: f64, b_i: f64) ComplexDouble { expect(a_r == 1.25) catch @panic("test failure: zig_cmultd_comp 1"); expect(a_i == 2.6) catch @panic("test failure: zig_cmultd_comp 2"); expect(b_r == 11.3) catch @panic("test failure: zig_cmultd_comp 3"); expect(b_i == -1.5) catch @panic("test failure: zig_cmultd_comp 4"); return .{ .real = 1.5, .imag = 13.5 }; } const BigStruct = extern struct { a: u64, b: u64, c: u64, d: u64, e: u8, }; extern fn c_big_struct(BigStruct) void; test "C ABI big struct" { if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; var s = BigStruct{ .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, }; c_big_struct(s); } export fn zig_big_struct(x: BigStruct) void { expect(x.a == 1) catch @panic("test failure: zig_big_struct 1"); expect(x.b == 2) catch @panic("test failure: zig_big_struct 2"); expect(x.c == 3) catch @panic("test failure: zig_big_struct 3"); expect(x.d == 4) catch @panic("test failure: zig_big_struct 4"); expect(x.e == 5) catch @panic("test failure: zig_big_struct 5"); } const BigUnion = extern union { a: BigStruct, }; extern fn c_big_union(BigUnion) void; test "C ABI big union" { if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; var x = BigUnion{ .a = BigStruct{ .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, }, }; c_big_union(x); } export fn zig_big_union(x: BigUnion) void { expect(x.a.a == 1) catch @panic("test failure: zig_big_union a"); expect(x.a.b == 2) catch @panic("test failure: zig_big_union b"); expect(x.a.c == 3) catch @panic("test failure: zig_big_union c"); expect(x.a.d == 4) catch @panic("test failure: zig_big_union d"); expect(x.a.e == 5) catch @panic("test failure: zig_big_union e"); } const MedStructMixed = extern struct { a: u32, b: f32, c: f32, d: u32 = 0, }; extern fn c_med_struct_mixed(MedStructMixed) void; extern fn c_ret_med_struct_mixed() MedStructMixed; test "C ABI medium struct of ints and floats" { if (builtin.cpu.arch == .x86) return error.SkipZigTest; if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; var s = MedStructMixed{ .a = 1234, .b = 100.0, .c = 1337.0, }; c_med_struct_mixed(s); var s2 = c_ret_med_struct_mixed(); try expect(s2.a == 1234); try expect(s2.b == 100.0); try expect(s2.c == 1337.0); } export fn zig_med_struct_mixed(x: MedStructMixed) void { expect(x.a == 1234) catch @panic("test failure"); expect(x.b == 100.0) catch @panic("test failure"); expect(x.c == 1337.0) catch @panic("test failure"); } const SmallStructInts = extern struct { a: u8, b: u8, c: u8, d: u8, }; extern fn c_small_struct_ints(SmallStructInts) void; extern fn c_ret_small_struct_ints() SmallStructInts; test "C ABI small struct of ints" { if (builtin.cpu.arch == .x86) return error.SkipZigTest; if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; var s = SmallStructInts{ .a = 1, .b = 2, .c = 3, .d = 4, }; c_small_struct_ints(s); var s2 = c_ret_small_struct_ints(); try expect(s2.a == 1); try expect(s2.b == 2); try expect(s2.c == 3); try expect(s2.d == 4); } export fn zig_small_struct_ints(x: SmallStructInts) void { expect(x.a == 1) catch @panic("test failure"); expect(x.b == 2) catch @panic("test failure"); expect(x.c == 3) catch @panic("test failure"); expect(x.d == 4) catch @panic("test failure"); } const SmallPackedStruct = packed struct { a: u2, b: u2, c: u2, d: u2, }; extern fn c_small_packed_struct(SmallPackedStruct) void; extern fn c_ret_small_packed_struct() SmallPackedStruct; export fn zig_small_packed_struct(x: SmallPackedStruct) void { expect(x.a == 0) catch @panic("test failure"); expect(x.b == 1) catch @panic("test failure"); expect(x.c == 2) catch @panic("test failure"); expect(x.d == 3) catch @panic("test failure"); } test "C ABI small packed struct" { var s = SmallPackedStruct{ .a = 0, .b = 1, .c = 2, .d = 3 }; c_small_packed_struct(s); var s2 = c_ret_small_packed_struct(); try expect(s2.a == 0); try expect(s2.b == 1); try expect(s2.c == 2); try expect(s2.d == 3); } const BigPackedStruct = packed struct { a: u64, b: u64, }; extern fn c_big_packed_struct(BigPackedStruct) void; extern fn c_ret_big_packed_struct() BigPackedStruct; export fn zig_big_packed_struct(x: BigPackedStruct) void { expect(x.a == 1) catch @panic("test failure"); expect(x.b == 2) catch @panic("test failure"); } test "C ABI big packed struct" { if (!has_i128) return error.SkipZigTest; var s = BigPackedStruct{ .a = 1, .b = 2 }; c_big_packed_struct(s); var s2 = c_ret_big_packed_struct(); try expect(s2.a == 1); try expect(s2.b == 2); } const SplitStructInt = extern struct { a: u64, b: u8, c: u32, }; extern fn c_split_struct_ints(SplitStructInt) void; test "C ABI split struct of ints" { if (builtin.cpu.arch == .x86) return error.SkipZigTest; if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; var s = SplitStructInt{ .a = 1234, .b = 100, .c = 1337, }; c_split_struct_ints(s); } export fn zig_split_struct_ints(x: SplitStructInt) void { expect(x.a == 1234) catch @panic("test failure"); expect(x.b == 100) catch @panic("test failure"); expect(x.c == 1337) catch @panic("test failure"); } const SplitStructMixed = extern struct { a: u64, b: u8, c: f32, }; extern fn c_split_struct_mixed(SplitStructMixed) void; extern fn c_ret_split_struct_mixed() SplitStructMixed; test "C ABI split struct of ints and floats" { if (builtin.cpu.arch == .x86) return error.SkipZigTest; if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; var s = SplitStructMixed{ .a = 1234, .b = 100, .c = 1337.0, }; c_split_struct_mixed(s); var s2 = c_ret_split_struct_mixed(); try expect(s2.a == 1234); try expect(s2.b == 100); try expect(s2.c == 1337.0); } export fn zig_split_struct_mixed(x: SplitStructMixed) void { expect(x.a == 1234) catch @panic("test failure"); expect(x.b == 100) catch @panic("test failure"); expect(x.c == 1337.0) catch @panic("test failure"); } extern fn c_big_struct_both(BigStruct) BigStruct; extern fn c_multiple_struct_ints(Rect, Rect) void; extern fn c_multiple_struct_floats(FloatRect, FloatRect) void; test "C ABI sret and byval together" { if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; var s = BigStruct{ .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, }; var y = c_big_struct_both(s); try expect(y.a == 10); try expect(y.b == 11); try expect(y.c == 12); try expect(y.d == 13); try expect(y.e == 14); } export fn zig_big_struct_both(x: BigStruct) BigStruct { expect(x.a == 30) catch @panic("test failure"); expect(x.b == 31) catch @panic("test failure"); expect(x.c == 32) catch @panic("test failure"); expect(x.d == 33) catch @panic("test failure"); expect(x.e == 34) catch @panic("test failure"); var s = BigStruct{ .a = 20, .b = 21, .c = 22, .d = 23, .e = 24, }; return s; } const Vector3 = extern struct { x: f32, y: f32, z: f32, }; extern fn c_small_struct_floats(Vector3) void; extern fn c_small_struct_floats_extra(Vector3, ?[*]const u8) void; const Vector5 = extern struct { x: f32, y: f32, z: f32, w: f32, q: f32, }; extern fn c_big_struct_floats(Vector5) void; test "C ABI structs of floats as parameter" { if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; var v3 = Vector3{ .x = 3.0, .y = 6.0, .z = 12.0, }; c_small_struct_floats(v3); c_small_struct_floats_extra(v3, "hello"); var v5 = Vector5{ .x = 76.0, .y = -1.0, .z = -12.0, .w = 69.0, .q = 55, }; c_big_struct_floats(v5); } const Rect = extern struct { left: u32, right: u32, top: u32, bottom: u32, }; export fn zig_multiple_struct_ints(x: Rect, y: Rect) void { expect(x.left == 1) catch @panic("test failure"); expect(x.right == 21) catch @panic("test failure"); expect(x.top == 16) catch @panic("test failure"); expect(x.bottom == 4) catch @panic("test failure"); expect(y.left == 178) catch @panic("test failure"); expect(y.right == 189) catch @panic("test failure"); expect(y.top == 21) catch @panic("test failure"); expect(y.bottom == 15) catch @panic("test failure"); } test "C ABI structs of ints as multiple parameters" { if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; var r1 = Rect{ .left = 1, .right = 21, .top = 16, .bottom = 4, }; var r2 = Rect{ .left = 178, .right = 189, .top = 21, .bottom = 15, }; c_multiple_struct_ints(r1, r2); } const FloatRect = extern struct { left: f32, right: f32, top: f32, bottom: f32, }; export fn zig_multiple_struct_floats(x: FloatRect, y: FloatRect) void { expect(x.left == 1) catch @panic("test failure"); expect(x.right == 21) catch @panic("test failure"); expect(x.top == 16) catch @panic("test failure"); expect(x.bottom == 4) catch @panic("test failure"); expect(y.left == 178) catch @panic("test failure"); expect(y.right == 189) catch @panic("test failure"); expect(y.top == 21) catch @panic("test failure"); expect(y.bottom == 15) catch @panic("test failure"); } test "C ABI structs of floats as multiple parameters" { if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; var r1 = FloatRect{ .left = 1, .right = 21, .top = 16, .bottom = 4, }; var r2 = FloatRect{ .left = 178, .right = 189, .top = 21, .bottom = 15, }; c_multiple_struct_floats(r1, r2); } export fn zig_ret_bool() bool { return true; } export fn zig_ret_u8() u8 { return 0xff; } export fn zig_ret_u16() u16 { return 0xffff; } export fn zig_ret_u32() u32 { return 0xffffffff; } export fn zig_ret_u64() u64 { return 0xffffffffffffffff; } export fn zig_ret_i8() i8 { return -1; } export fn zig_ret_i16() i16 { return -1; } export fn zig_ret_i32() i32 { return -1; } export fn zig_ret_i64() i64 { return -1; } export fn zig_ret_small_struct_ints() SmallStructInts { return .{ .a = 1, .b = 2, .c = 3, .d = 4, }; } export fn zig_ret_med_struct_mixed() MedStructMixed { return .{ .a = 1234, .b = 100.0, .c = 1337.0, }; } export fn zig_ret_split_struct_mixed() SplitStructMixed { return .{ .a = 1234, .b = 100, .c = 1337.0, }; } extern fn c_ret_bool() bool; extern fn c_ret_u8() u8; extern fn c_ret_u16() u16; extern fn c_ret_u32() u32; extern fn c_ret_u64() u64; extern fn c_ret_i8() i8; extern fn c_ret_i16() i16; extern fn c_ret_i32() i32; extern fn c_ret_i64() i64; test "C ABI integer return types" { try expect(c_ret_bool() == true); try expect(c_ret_u8() == 0xff); try expect(c_ret_u16() == 0xffff); try expect(c_ret_u32() == 0xffffffff); try expect(c_ret_u64() == 0xffffffffffffffff); try expect(c_ret_i8() == -1); try expect(c_ret_i16() == -1); try expect(c_ret_i32() == -1); try expect(c_ret_i64() == -1); } const StructWithArray = extern struct { a: i32, padding: [4]u8, b: i64, }; extern fn c_struct_with_array(StructWithArray) void; extern fn c_ret_struct_with_array() StructWithArray; test "Struct with array as padding." { if (builtin.cpu.arch == .x86) return error.SkipZigTest; if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; c_struct_with_array(.{ .a = 1, .padding = undefined, .b = 2 }); var x = c_ret_struct_with_array(); try expect(x.a == 4); try expect(x.b == 155); } const FloatArrayStruct = extern struct { origin: extern struct { x: f64, y: f64, }, size: extern struct { width: f64, height: f64, }, }; extern fn c_float_array_struct(FloatArrayStruct) void; extern fn c_ret_float_array_struct() FloatArrayStruct; test "Float array like struct" { if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; c_float_array_struct(.{ .origin = .{ .x = 5, .y = 6, }, .size = .{ .width = 7, .height = 8, }, }); var x = c_ret_float_array_struct(); try expect(x.origin.x == 1); try expect(x.origin.y == 2); try expect(x.size.width == 3); try expect(x.size.height == 4); } const SmallVec = @Vector(2, u32); extern fn c_small_vec(SmallVec) void; extern fn c_ret_small_vec() SmallVec; test "small simd vector" { if (builtin.cpu.arch == .x86) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; c_small_vec(.{ 1, 2 }); var x = c_ret_small_vec(); try expect(x[0] == 3); try expect(x[1] == 4); } const MediumVec = @Vector(4, usize); extern fn c_medium_vec(MediumVec) void; extern fn c_ret_medium_vec() MediumVec; test "medium simd vector" { if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; c_medium_vec(.{ 1, 2, 3, 4 }); var x = c_ret_medium_vec(); try expect(x[0] == 5); try expect(x[1] == 6); try expect(x[2] == 7); try expect(x[3] == 8); } const BigVec = @Vector(8, usize); extern fn c_big_vec(BigVec) void; extern fn c_ret_big_vec() BigVec; test "big simd vector" { if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; c_big_vec(.{ 1, 2, 3, 4, 5, 6, 7, 8 }); var x = c_ret_big_vec(); try expect(x[0] == 9); try expect(x[1] == 10); try expect(x[2] == 11); try expect(x[3] == 12); try expect(x[4] == 13); try expect(x[5] == 14); try expect(x[6] == 15); try expect(x[7] == 16); } const Vector2 = extern struct { x: f32, y: f32 }; extern fn c_ptr_size_float_struct(Vector2) void; extern fn c_ret_ptr_size_float_struct() Vector2; test "C ABI pointer sized float struct" { if (builtin.cpu.arch == .x86) return error.SkipZigTest; if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isRISCV()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; c_ptr_size_float_struct(.{ .x = 1, .y = 2 }); var x = c_ret_ptr_size_float_struct(); try expect(x.x == 3); try expect(x.y == 4); } //=== Helpers for struct test ===// pub inline fn expectOk(c_err: c_int) !void { if (c_err != 0) { std.debug.print("ABI mismatch on field v{d}.\n", .{c_err}); return error.TestExpectedEqual; } } /// Tests for Double + Char struct const DC = extern struct { v1: f64, v2: u8 }; test "DC: Zig passes to C" { if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isRISCV()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; try expectOk(c_assert_DC(.{ .v1 = -0.25, .v2 = 15 })); } test "DC: Zig returns to C" { if (comptime builtin.cpu.arch.isRISCV()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; try expectOk(c_assert_ret_DC()); } test "DC: C passes to Zig" { if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isRISCV()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; try expectOk(c_send_DC()); } test "DC: C returns to Zig" { if (comptime builtin.cpu.arch.isRISCV()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; try expectEqual(c_ret_DC(), .{ .v1 = -0.25, .v2 = 15 }); } pub extern fn c_assert_DC(lv: DC) c_int; pub extern fn c_assert_ret_DC() c_int; pub extern fn c_send_DC() c_int; pub extern fn c_ret_DC() DC; pub export fn zig_assert_DC(lv: DC) c_int { var err: c_int = 0; if (lv.v1 != -0.25) err = 1; if (lv.v2 != 15) err = 2; if (err != 0) std.debug.print("Received {}", .{lv}); return err; } pub export fn zig_ret_DC() DC { return .{ .v1 = -0.25, .v2 = 15 }; } /// Tests for Char + Float + FloatRect struct const CFF = extern struct { v1: u8, v2: f32, v3: f32 }; test "CFF: Zig passes to C" { if (builtin.target.cpu.arch == .x86) return error.SkipZigTest; if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; try expectOk(c_assert_CFF(.{ .v1 = 39, .v2 = 0.875, .v3 = 1.0 })); } test "CFF: Zig returns to C" { if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; try expectOk(c_assert_ret_CFF()); } test "CFF: C passes to Zig" { if (builtin.target.cpu.arch == .x86) return error.SkipZigTest; if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; try expectOk(c_send_CFF()); } test "CFF: C returns to Zig" { if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; try expectEqual(c_ret_CFF(), .{ .v1 = 39, .v2 = 0.875, .v3 = 1.0 }); } pub extern fn c_assert_CFF(lv: CFF) c_int; pub extern fn c_assert_ret_CFF() c_int; pub extern fn c_send_CFF() c_int; pub extern fn c_ret_CFF() CFF; pub export fn zig_assert_CFF(lv: CFF) c_int { var err: c_int = 0; if (lv.v1 != 39) err = 1; if (lv.v2 != 0.875) err = 2; if (lv.v3 != 1.0) err = 3; if (err != 0) std.debug.print("Received {}", .{lv}); return err; } pub export fn zig_ret_CFF() CFF { return .{ .v1 = 39, .v2 = 0.875, .v3 = 1.0 }; } /// Tests for Pointer + Double struct const PD = extern struct { v1: ?*anyopaque, v2: f64 }; test "PD: Zig passes to C" { if (builtin.target.cpu.arch == .x86) return error.SkipZigTest; if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; try expectOk(c_assert_PD(.{ .v1 = null, .v2 = 0.5 })); } test "PD: Zig returns to C" { if (builtin.target.cpu.arch == .x86) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; try expectOk(c_assert_ret_PD()); } test "PD: C passes to Zig" { if (builtin.target.cpu.arch == .x86) return error.SkipZigTest; if (comptime builtin.cpu.arch.isMIPS()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; try expectOk(c_send_PD()); } test "PD: C returns to Zig" { if (builtin.target.cpu.arch == .x86) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; if (comptime builtin.cpu.arch.isPPC64()) return error.SkipZigTest; try expectEqual(c_ret_PD(), .{ .v1 = null, .v2 = 0.5 }); } pub extern fn c_assert_PD(lv: PD) c_int; pub extern fn c_assert_ret_PD() c_int; pub extern fn c_send_PD() c_int; pub extern fn c_ret_PD() PD; pub export fn zig_c_assert_PD(lv: PD) c_int { var err: c_int = 0; if (lv.v1 != null) err = 1; if (lv.v2 != 0.5) err = 2; if (err != 0) std.debug.print("Received {}", .{lv}); return err; } pub export fn zig_ret_PD() PD { return .{ .v1 = null, .v2 = 0.5 }; } pub export fn zig_assert_PD(lv: PD) c_int { var err: c_int = 0; if (lv.v1 != null) err = 1; if (lv.v2 != 0.5) err = 2; if (err != 0) std.debug.print("Received {}", .{lv}); return err; } const ByRef = extern struct { val: c_int, arr: [15]c_int, }; extern fn c_modify_by_ref_param(ByRef) ByRef; test "C function modifies by ref param" { if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; const res = c_modify_by_ref_param(.{ .val = 1, .arr = undefined }); try expect(res.val == 42); } const ByVal = extern struct { origin: extern struct { x: c_ulong, y: c_ulong, z: c_ulong, }, size: extern struct { width: c_ulong, height: c_ulong, depth: c_ulong, }, }; extern fn c_func_ptr_byval(*anyopaque, *anyopaque, ByVal, c_ulong, *anyopaque, c_ulong) void; test "C function that takes byval struct called via function pointer" { if (comptime builtin.cpu.arch.isPPC()) return error.SkipZigTest; var fn_ptr = &c_func_ptr_byval; fn_ptr( @intToPtr(*anyopaque, 1), @intToPtr(*anyopaque, 2), ByVal{ .origin = .{ .x = 9, .y = 10, .z = 11 }, .size = .{ .width = 12, .height = 13, .depth = 14 }, }, @as(c_ulong, 3), @intToPtr(*anyopaque, 4), @as(c_ulong, 5), ); }