mirror of
https://github.com/roc-lang/roc.git
synced 2024-09-21 15:59:20 +03:00
218 lines
6.6 KiB
Zig
218 lines
6.6 KiB
Zig
const std = @import("std");
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const str = @import("str");
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const RocStr = str.RocStr;
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const testing = std.testing;
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const expectEqual = testing.expectEqual;
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const expect = testing.expect;
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const maxInt = std.math.maxInt;
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comptime {
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// This is a workaround for https://github.com/ziglang/zig/issues/8218
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// which is only necessary on macOS.
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//
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// Once that issue is fixed, we can undo the changes in
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// 177cf12e0555147faa4d436e52fc15175c2c4ff0 and go back to passing
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// -fcompiler-rt in link.rs instead of doing this. Note that this
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// workaround is present in many host.zig files, so make sure to undo
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// it everywhere!
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const builtin = @import("builtin");
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if (builtin.os.tag == .macos) {
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_ = @import("compiler_rt");
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}
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}
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const mem = std.mem;
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const Allocator = mem.Allocator;
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extern fn roc__mainForHost_1_exposed_generic([*]u8) void;
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extern fn roc__mainForHost_size() i64;
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extern fn roc__mainForHost_1__Fx_caller(*const u8, [*]u8, [*]u8) void;
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extern fn roc__mainForHost_1__Fx_size() i64;
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extern fn roc__mainForHost_1__Fx_result_size() i64;
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const Align = 2 * @alignOf(usize);
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extern fn malloc(size: usize) callconv(.C) ?*align(Align) anyopaque;
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extern fn realloc(c_ptr: [*]align(Align) u8, size: usize) callconv(.C) ?*anyopaque;
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extern fn free(c_ptr: [*]align(Align) u8) callconv(.C) void;
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extern fn memcpy(dst: [*]u8, src: [*]u8, size: usize) callconv(.C) void;
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extern fn memset(dst: [*]u8, value: i32, size: usize) callconv(.C) void;
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const DEBUG: bool = false;
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export fn roc_alloc(size: usize, alignment: u32) callconv(.C) ?*anyopaque {
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if (DEBUG) {
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var ptr = malloc(size);
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const stdout = std.io.getStdOut().writer();
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stdout.print("alloc: {d} (alignment {d}, size {d})\n", .{ ptr, alignment, size }) catch unreachable;
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return ptr;
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} else {
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return malloc(size);
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}
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}
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export fn roc_realloc(c_ptr: *anyopaque, new_size: usize, old_size: usize, alignment: u32) callconv(.C) ?*anyopaque {
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if (DEBUG) {
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const stdout = std.io.getStdOut().writer();
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stdout.print("realloc: {d} (alignment {d}, old_size {d})\n", .{ c_ptr, alignment, old_size }) catch unreachable;
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}
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return realloc(@alignCast(Align, @ptrCast([*]u8, c_ptr)), new_size);
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}
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export fn roc_dealloc(c_ptr: *anyopaque, alignment: u32) callconv(.C) void {
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if (DEBUG) {
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const stdout = std.io.getStdOut().writer();
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stdout.print("dealloc: {d} (alignment {d})\n", .{ c_ptr, alignment }) catch unreachable;
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}
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free(@alignCast(Align, @ptrCast([*]u8, c_ptr)));
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}
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export fn roc_panic(c_ptr: *anyopaque, tag_id: u32) callconv(.C) void {
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_ = tag_id;
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const stderr = std.io.getStdErr().writer();
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const msg = @ptrCast([*:0]const u8, c_ptr);
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stderr.print("Application crashed with message\n\n {s}\n\nShutting down\n", .{msg}) catch unreachable;
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std.process.exit(0);
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}
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export fn roc_memcpy(dst: [*]u8, src: [*]u8, size: usize) callconv(.C) void {
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return memcpy(dst, src, size);
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}
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export fn roc_memset(dst: [*]u8, value: i32, size: usize) callconv(.C) void {
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return memset(dst, value, size);
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}
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const Unit = extern struct {};
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pub export fn main() callconv(.C) u8 {
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const size = @intCast(usize, roc__mainForHost_size());
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const raw_output = roc_alloc(@intCast(usize, size), @alignOf(u64)).?;
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var output = @ptrCast([*]u8, raw_output);
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defer {
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roc_dealloc(raw_output, @alignOf(u64));
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}
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var ts1: std.os.timespec = undefined;
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std.os.clock_gettime(std.os.CLOCK.REALTIME, &ts1) catch unreachable;
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roc__mainForHost_1_exposed_generic(output);
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const closure_data_pointer = @ptrCast([*]u8, output);
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call_the_closure(closure_data_pointer);
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var ts2: std.os.timespec = undefined;
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std.os.clock_gettime(std.os.CLOCK.REALTIME, &ts2) catch unreachable;
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const delta = to_seconds(ts2) - to_seconds(ts1);
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const stderr = std.io.getStdErr().writer();
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stderr.print("runtime: {d:.3}ms\n", .{delta * 1000}) catch unreachable;
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return 0;
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}
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fn to_seconds(tms: std.os.timespec) f64 {
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return @intToFloat(f64, tms.tv_sec) + (@intToFloat(f64, tms.tv_nsec) / 1_000_000_000.0);
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}
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fn call_the_closure(closure_data_pointer: [*]u8) void {
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const allocator = std.heap.page_allocator;
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const size = roc__mainForHost_1__Fx_result_size();
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const raw_output = allocator.allocAdvanced(u8, @alignOf(u64), @intCast(usize, size), .at_least) catch unreachable;
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var output = @ptrCast([*]u8, raw_output);
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defer {
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allocator.free(raw_output);
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}
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const flags: u8 = 0;
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roc__mainForHost_1__Fx_caller(&flags, closure_data_pointer, output);
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// The closure returns result, nothing interesting to do with it
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return;
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}
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pub export fn roc_fx_putInt(int: i64) i64 {
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const stdout = std.io.getStdOut().writer();
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stdout.print("{d}", .{int}) catch unreachable;
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stdout.print("\n", .{}) catch unreachable;
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return 0;
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}
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export fn roc_fx_putLine(rocPath: *str.RocStr) callconv(.C) void {
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const stdout = std.io.getStdOut().writer();
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for (rocPath.asSlice()) |char| {
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stdout.print("{c}", .{char}) catch unreachable;
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}
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stdout.print("\n", .{}) catch unreachable;
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}
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const GetInt = extern struct {
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value: i64,
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is_error: bool,
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};
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comptime {
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if (@sizeOf(usize) == 8) {
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@export(roc_fx_getInt_64bit, .{ .name = "roc_fx_getInt" });
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} else {
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@export(roc_fx_getInt_32bit, .{ .name = "roc_fx_getInt" });
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}
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}
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fn roc_fx_getInt_64bit() callconv(.C) GetInt {
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if (roc_fx_getInt_help()) |value| {
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const get_int = GetInt{ .is_error = false, .value = value };
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return get_int;
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} else |err| switch (err) {
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error.InvalidCharacter => {
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return GetInt{ .is_error = true, .value = 0 };
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},
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else => {
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return GetInt{ .is_error = true, .value = 0 };
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},
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}
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return 0;
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}
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fn roc_fx_getInt_32bit(output: *GetInt) callconv(.C) void {
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if (roc_fx_getInt_help()) |value| {
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const get_int = GetInt{ .is_error = false, .value = value, .error_code = false };
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output.* = get_int;
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} else |err| switch (err) {
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error.InvalidCharacter => {
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output.* = GetInt{ .is_error = true, .value = 0, .error_code = false };
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},
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else => {
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output.* = GetInt{ .is_error = true, .value = 0, .error_code = true };
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},
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}
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return;
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}
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fn roc_fx_getInt_help() !i64 {
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const stdout = std.io.getStdOut().writer();
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stdout.print("Please enter an integer\n", .{}) catch unreachable;
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const stdin = std.io.getStdIn().reader();
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var buf: [40]u8 = undefined;
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const line: []u8 = (try stdin.readUntilDelimiterOrEof(&buf, '\n')) orelse "";
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return std.fmt.parseInt(i64, line, 10);
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}
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