Merge remote-tracking branch 'origin/main' into roc-dev-inline-expects

crates/cli_testing_examples/benchmarks/platform/host.zig

@@ -0,0 +1,217 @@
+const std = @import("std");
+const str = @import("str");
+const RocStr = str.RocStr;
+const testing = std.testing;
+const expectEqual = testing.expectEqual;
+const expect = testing.expect;
+const maxInt = std.math.maxInt;
+
+comptime {
+    // This is a workaround for https://github.com/ziglang/zig/issues/8218
+    // which is only necessary on macOS.
+    //
+    // Once that issue is fixed, we can undo the changes in
+    // 177cf12e0555147faa4d436e52fc15175c2c4ff0 and go back to passing
+    // -fcompiler-rt in link.rs instead of doing this. Note that this
+    // workaround is present in many host.zig files, so make sure to undo
+    // it everywhere!
+    const builtin = @import("builtin");
+    if (builtin.os.tag == .macos) {
+        _ = @import("compiler_rt");
+    }
+}
+
+const mem = std.mem;
+const Allocator = mem.Allocator;
+
+extern fn roc__mainForHost_1_exposed_generic([*]u8) void;
+extern fn roc__mainForHost_size() i64;
+extern fn roc__mainForHost_1__Fx_caller(*const u8, [*]u8, [*]u8) void;
+extern fn roc__mainForHost_1__Fx_size() i64;
+extern fn roc__mainForHost_1__Fx_result_size() i64;
+
+const Align = 2 * @alignOf(usize);
+extern fn malloc(size: usize) callconv(.C) ?*align(Align) anyopaque;
+extern fn realloc(c_ptr: [*]align(Align) u8, size: usize) callconv(.C) ?*anyopaque;
+extern fn free(c_ptr: [*]align(Align) u8) callconv(.C) void;
+extern fn memcpy(dst: [*]u8, src: [*]u8, size: usize) callconv(.C) void;
+extern fn memset(dst: [*]u8, value: i32, size: usize) callconv(.C) void;
+
+const DEBUG: bool = false;
+
+export fn roc_alloc(size: usize, alignment: u32) callconv(.C) ?*anyopaque {
+    if (DEBUG) {
+        var ptr = malloc(size);
+        const stdout = std.io.getStdOut().writer();
+        stdout.print("alloc:   {d} (alignment {d}, size {d})\n", .{ ptr, alignment, size }) catch unreachable;
+        return ptr;
+    } else {
+        return malloc(size);
+    }
+}
+
+export fn roc_realloc(c_ptr: *anyopaque, new_size: usize, old_size: usize, alignment: u32) callconv(.C) ?*anyopaque {
+    if (DEBUG) {
+        const stdout = std.io.getStdOut().writer();
+        stdout.print("realloc: {d} (alignment {d}, old_size {d})\n", .{ c_ptr, alignment, old_size }) catch unreachable;
+    }
+
+    return realloc(@alignCast(Align, @ptrCast([*]u8, c_ptr)), new_size);
+}
+
+export fn roc_dealloc(c_ptr: *anyopaque, alignment: u32) callconv(.C) void {
+    if (DEBUG) {
+        const stdout = std.io.getStdOut().writer();
+        stdout.print("dealloc: {d} (alignment {d})\n", .{ c_ptr, alignment }) catch unreachable;
+    }
+
+    free(@alignCast(Align, @ptrCast([*]u8, c_ptr)));
+}
+
+export fn roc_panic(c_ptr: *anyopaque, tag_id: u32) callconv(.C) void {
+    _ = tag_id;
+
+    const stderr = std.io.getStdErr().writer();
+    const msg = @ptrCast([*:0]const u8, c_ptr);
+    stderr.print("Application crashed with message\n\n    {s}\n\nShutting down\n", .{msg}) catch unreachable;
+    std.process.exit(0);
+}
+
+export fn roc_memcpy(dst: [*]u8, src: [*]u8, size: usize) callconv(.C) void {
+    return memcpy(dst, src, size);
+}
+
+export fn roc_memset(dst: [*]u8, value: i32, size: usize) callconv(.C) void {
+    return memset(dst, value, size);
+}
+
+const Unit = extern struct {};
+
+pub fn main() !u8 {
+    const stderr = std.io.getStdErr().writer();
+
+    // The size might be zero; if so, make it at least 8 so that we don't have a nullptr
+    const size = std.math.max(@intCast(usize, roc__mainForHost_size()), 8);
+    const raw_output = roc_alloc(@intCast(usize, size), @alignOf(u64)).?;
+    var output = @ptrCast([*]u8, raw_output);
+
+    defer {
+        roc_dealloc(raw_output, @alignOf(u64));
+    }
+
+    var timer = std.time.Timer.start() catch unreachable;
+
+    roc__mainForHost_1_exposed_generic(output);
+
+    const closure_data_pointer = @ptrCast([*]u8, output);
+
+    call_the_closure(closure_data_pointer);
+
+    const nanos = timer.read();
+    const seconds = (@intToFloat(f64, nanos) / 1_000_000_000.0);
+
+    stderr.print("runtime: {d:.3}ms\n", .{seconds * 1000}) catch unreachable;
+
+    return 0;
+}
+
+fn to_seconds(tms: std.os.timespec) f64 {
+    return @intToFloat(f64, tms.tv_sec) + (@intToFloat(f64, tms.tv_nsec) / 1_000_000_000.0);
+}
+
+fn call_the_closure(closure_data_pointer: [*]u8) void {
+    const allocator = std.heap.page_allocator;
+
+    // The size might be zero; if so, make it at least 8 so that we don't have a nullptr
+    const size = std.math.max(roc__mainForHost_1__Fx_result_size(), 8);
+    const raw_output = allocator.allocAdvanced(u8, @alignOf(u64), @intCast(usize, size), .at_least) catch unreachable;
+    var output = @ptrCast([*]u8, raw_output);
+
+    defer {
+        allocator.free(raw_output);
+    }
+
+    const flags: u8 = 0;
+
+    roc__mainForHost_1__Fx_caller(&flags, closure_data_pointer, output);
+
+    // The closure returns result, nothing interesting to do with it
+    return;
+}
+
+pub export fn roc_fx_putInt(int: i64) i64 {
+    const stdout = std.io.getStdOut().writer();
+
+    stdout.print("{d}", .{int}) catch unreachable;
+
+    stdout.print("\n", .{}) catch unreachable;
+
+    return 0;
+}
+
+export fn roc_fx_putLine(rocPath: *str.RocStr) callconv(.C) void {
+    const stdout = std.io.getStdOut().writer();
+
+    for (rocPath.asSlice()) |char| {
+        stdout.print("{c}", .{char}) catch unreachable;
+    }
+
+    stdout.print("\n", .{}) catch unreachable;
+}
+
+const GetInt = extern struct {
+    value: i64,
+    is_error: bool,
+};
+
+comptime {
+    if (@sizeOf(usize) == 8) {
+        @export(roc_fx_getInt_64bit, .{ .name = "roc_fx_getInt" });
+    } else {
+        @export(roc_fx_getInt_32bit, .{ .name = "roc_fx_getInt" });
+    }
+}
+
+fn roc_fx_getInt_64bit() callconv(.C) GetInt {
+    if (roc_fx_getInt_help()) |value| {
+        const get_int = GetInt{ .is_error = false, .value = value };
+        return get_int;
+    } else |err| switch (err) {
+        error.InvalidCharacter => {
+            return GetInt{ .is_error = true, .value = 0 };
+        },
+        else => {
+            return GetInt{ .is_error = true, .value = 0 };
+        },
+    }
+
+    return 0;
+}
+
+fn roc_fx_getInt_32bit(output: *GetInt) callconv(.C) void {
+    if (roc_fx_getInt_help()) |value| {
+        const get_int = GetInt{ .is_error = false, .value = value, .error_code = false };
+        output.* = get_int;
+    } else |err| switch (err) {
+        error.InvalidCharacter => {
+            output.* = GetInt{ .is_error = true, .value = 0, .error_code = false };
+        },
+        else => {
+            output.* = GetInt{ .is_error = true, .value = 0, .error_code = true };
+        },
+    }
+
+    return;
+}
+
+fn roc_fx_getInt_help() !i64 {
+    const stdout = std.io.getStdOut().writer();
+    stdout.print("Please enter an integer\n", .{}) catch unreachable;
+
+    const stdin = std.io.getStdIn().reader();
+    var buf: [40]u8 = undefined;
+
+    const line: []u8 = (try stdin.readUntilDelimiterOrEof(&buf, '\n')) orelse "";
+
+    return std.fmt.parseInt(i64, line, 10);
+}