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mach: Rename `js-runtime subproject to sysjs`

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iddev5 2022-07-13 12:40:29 +05:30 • committed by Stephen Gutekanst
parent 05b0df052d
commit 7a0d39c274
11 changed files with 7 additions and 7 deletions
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zig-out/
zig-cache/

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Copyright 2021, Hexops Contributors (given via the Git commit history).
All documentation, image, sound, font, and 2D/3D model files are CC-BY-4.0 licensed unless
otherwise noted. You may get a copy of this license at https://creativecommons.org/licenses/by/4.0
Files in a directory with a separate LICENSE file may contain files under different license terms,
described within that LICENSE file.
All other files are licensed under the Apache License, Version 2.0 (see LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
or the MIT license (see LICENSE-MIT or http://opensource.org/licenses/MIT), at your option.
All files in the project without exclusions may not be copied, modified, or distributed except
according to the terms above.

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# mach-sysjs

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const std = @import("std");
pub fn build(b: *std.build.Builder) void {
const mode = b.standardReleaseOptions();
const main_tests = b.addTest("src/main.zig");
main_tests.addPackage(pkg);
main_tests.setBuildMode(mode);
const test_step = b.step("test", "Run library tests");
test_step.dependOn(&main_tests.step);
}
pub const pkg = std.build.Pkg{
.name = "sysjs",
.source = .{ .path = thisDir() ++ "/src/main.zig" },
.dependencies = &[_]std.build.Pkg{},
};
fn thisDir() []const u8 {
return std.fs.path.dirname(@src().file) orelse ".";
}

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let text_decoder = new TextDecoder();
let text_encoder = new TextEncoder();
let log_buf = "";
let uindex = 0;
let indices = [];
let values = [];
let value_map = {};
class MemoryBlock {
constructor(mem, offset = 0) {
this.mem = mem;
this.offset = offset;
}
slice(offset) {
return new MemoryBlock(this.mem, offset);
}
getMemory() {
return new DataView(this.mem, this.offset);
}
getU8(offset) {
return this.getMemory().getUint8(offset, true);
}
getU32(offset) {
return this.getMemory().getUint32(offset, true);
}
getU64(offset) {
const ls = this.getU32(offset);
const ms = this.getU32(offset + 4);
return ls + ms * 4294967296;
}
getF64(offset) {
return this.getMemory().getFloat64(offset, true);
}
getString(offset, len) {
return text_decoder.decode(new Uint8Array(this.mem, offset, len));
}
setU8(offset, data) {
this.getMemory().setUint8(offset, data, true);
}
setU32(offset, data) {
this.getMemory().setUint32(offset, data, true);
}
setU64(offset, data) {
this.getMemory().setUint32(offset, data, true);
this.getMemory().setUint32(offset + 4, Math.floor(data / 4294967296), true);
}
setF64(offset, data) {
this.getMemory().setFloat64(offset, data, true);
}
setString(offset, str) {
const string = text_encoder.encode(str);
const buffer = new Uint8Array(this.mem, offset, string.length);
for (let i = 0; i < string.length; i += 1) {
buffer[i] = string[i];
}
}
}
const zig = {
wasm: undefined,
buffer: undefined,
init(wasm) {
this.wasm = wasm;
values = [];
value_map = {};
this.addValue(globalThis);
},
addValue(value) {
value.__proto__.__uindex = uindex;
let idx = indices.pop();
if (idx !== undefined) {
values[idx] = value;
} else {
idx = values.push(value) - 1;
}
value_map[uindex] = idx;
uindex += 1;
return idx;
},
zigCreateMap() {
return zig.addValue(new Map());
},
zigCreateArray() {
return zig.addValue(new Array());
},
zigCreateString(str, len) {
let memory = new MemoryBlock(zig.wasm.exports.memory.buffer);
return zig.addValue(memory.getString(str, len));
},
zigCreateFunction(id) {
return zig.addValue(function () {
const args = zig.addValue(arguments);
zig.wasm.exports.wasmCallFunction(id, args, arguments.length);
const return_value = values[args]["return_value"];
zig.zigCleanupObject(args);
return return_value;
});
},
getType(value) {
switch (typeof value) {
case "object":
switch (value) {
case null:
return 4;
default:
return 0;
}
break;
case "number":
return 1;
case "boolean":
return 2;
case "string":
return 3;
case "undefined":
return 5;
case "function":
return 6;
}
},
writeObject(block, data, type) {
switch (type) {
case 0:
case 6:
block.setU8(0, type);
block.setU64(8, data);
break;
case 1:
block.setU8(0, 1);
block.setF64(8, data);
break;
case 2:
block.setU8(0, 2);
block.setU8(8, data);
break;
case 3:
block.setU8(0, 3);
block.setU64(8, data);
break;
case 4:
block.setU8(0, 4);
break;
case 5:
block.setU8(0, 5);
break;
}
},
readObject(block, memory) {
switch (block.getU8(0)) {
case 0:
case 6:
return values[block.getU64(8)];
break;
case 1:
return block.getF64(8);
break;
case 2:
return Boolean(block.getU8(8));
break;
case 3:
return values[block.getU64(8)];
break;
case 4:
return null;
break;
case 5:
return undefined;
break;
}
},
getPropertyEx(prop, ret_ptr, offset) {
let len = undefined;
const type = this.getType(prop);
switch (type) {
case 3:
len = prop.length;
case 0:
case 6:
if (prop in value_map) {
prop = value_map[prop.__uindex];
} else {
prop = zig.addValue(prop);
}
break;
}
if (len !== undefined) prop.__proto__.length = len;
let memory = new MemoryBlock(ret_ptr, offset);
zig.writeObject(memory, prop, type);
},
getProperty(prop, ret_ptr) {
return zig.getPropertyEx(prop, zig.wasm.exports.memory.buffer, ret_ptr);
},
zigGetProperty(id, name, len, ret_ptr) {
let memory = new MemoryBlock(zig.wasm.exports.memory.buffer);
let prop = values[id][memory.getString(name, len)];
zig.getProperty(prop, ret_ptr);
},
zigSetProperty(id, name, len, set_ptr) {
let memory = new MemoryBlock(zig.wasm.exports.memory.buffer);
values[id][memory.getString(name, len)] = zig.readObject(
memory.slice(set_ptr),
memory
);
},
zigDeleteProperty(id, name, len) {
let memory = new MemoryBlock(zig.wasm.exports.memory.buffer);
delete values[id][memory.getString(name, len)];
},
zigGetIndex(id, index, ret_ptr) {
let prop = values[id][index];
zig.getProperty(prop, ret_ptr);
},
zigSetIndex(id, index, set_ptr) {
let memory = new MemoryBlock(zig.wasm.exports.memory.buffer);
values[id][index] = zig.readObject(memory.slice(set_ptr), memory);
},
zigDeleteIndex(id, index) {
delete values[id][index];
},
zigGetAttributeCount(id) {
let obj = values[id];
return Object.keys(obj).length;
},
zigCleanupObject(id) {
const idx = Number(id);
delete value_map[values[idx].__uindex];
delete values[idx];
indices.push(idx);
},
zigGetStringLength(val_id) {
return values[value_map[val_id]].length;
},
zigGetString(val_id, ptr) {
let memory = new MemoryBlock(zig.wasm.exports.memory.buffer);
memory.setString(ptr, values[value_map[val_id]]);
},
zigValueEqual(val, other) {
let memory = new MemoryBlock(zig.wasm.exports.memory.buffer);
const val_js = zig.readObject(memory.slice(val), memory);
const other_js = zig.readObject(memory.slice(other), memory);
return val_js === other_js;
},
zigValueInstanceOf(val, other) {
let memory = new MemoryBlock(zig.wasm.exports.memory.buffer);
const val_js = zig.readObject(memory.slice(val), memory);
const other_js = zig.readObject(memory.slice(other), memory);
return val_js instanceof other_js;
},
functionCall(func, this_param, args, args_len, ret_ptr) {
let memory = new MemoryBlock(zig.wasm.exports.memory.buffer);
let argv = [];
for (let i = 0; i < args_len; i += 1) {
argv.push(zig.readObject(memory.slice(args + i * 16), memory));
}
let result = func.apply(this_param, argv);
let length = undefined;
const type = zig.getType(result);
switch (type) {
case 3:
length = result.length;
case 0:
case 6:
result = zig.addValue(result);
break;
}
if (length !== undefined) result.__proto__.length = length;
zig.writeObject(memory.slice(ret_ptr), result, type);
},
zigFunctionCall(id, name, len, args, args_len, ret_ptr) {
let memory = new MemoryBlock(zig.wasm.exports.memory.buffer);
zig.functionCall(
values[id][memory.getString(name, len)],
values[id],
args,
args_len,
ret_ptr
);
},
zigFunctionInvoke(id, args, args_len, ret_ptr) {
zig.functionCall(values[id], undefined, args, args_len, ret_ptr);
},
zigGetParamCount(id) {
return values[id].length;
},
zigConstructType(id, args, args_len) {
let memory = new MemoryBlock(zig.wasm.exports.memory.buffer);
let argv = [];
for (let i = 0; i < args_len; i += 1) {
argv.push(zig.readObject(memory.slice(args + i * 16), memory));
}
return zig.addValue(new values[id](argv));
},
wzLogWrite(str, len) {
let memory = new MemoryBlock(zig.wasm.exports.memory.buffer);
log_buf += memory.getString(str, len);
},
wzLogFlush() {
console.log(log_buf);
log_buf = "";
},
wzPanic(str, len) {
let memory = new MemoryBlock(zig.wasm.exports.memory.buffer);
throw Error(memory.getString(str, len));
},
};
export { zig };

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const std = @import("std");
const Allocator = std.mem.Allocator;
const builtin = @import("builtin");
const js = struct {
extern fn zigCreateMap() u32;
extern fn zigCreateArray() u32;
extern fn zigCreateString(str: [*]const u8, len: u32) u32;
extern fn zigCreateFunction(id: *const anyopaque) u32;
extern fn zigGetAttributeCount(id: u64) u32;
extern fn zigGetProperty(id: u64, name: [*]const u8, len: u32, ret_ptr: *anyopaque) void;
extern fn zigSetProperty(id: u64, name: [*]const u8, len: u32, set_ptr: *const anyopaque) void;
extern fn zigDeleteProperty(id: u64, name: [*]const u8, len: u32) void;
extern fn zigGetIndex(id: u64, index: u32, ret_ptr: *anyopaque) void;
extern fn zigSetIndex(id: u64, index: u32, set_ptr: *const anyopaque) void;
extern fn zigGetString(val_id: u64, ptr: [*]const u8) void;
extern fn zigGetStringLength(val_id: u64) u32;
extern fn zigValueEqual(val: *const anyopaque, other: *const anyopaque) bool;
extern fn zigValueInstanceOf(val: *const anyopaque, other: *const anyopaque) bool;
extern fn zigDeleteIndex(id: u64, index: u32) void;
extern fn zigFunctionCall(id: u64, name: [*]const u8, len: u32, args: ?*const anyopaque, args_len: u32, ret_ptr: *anyopaque) void;
extern fn zigFunctionInvoke(id: u64, args: ?*const anyopaque, args_len: u32, ret_ptr: *anyopaque) void;
extern fn zigGetParamCount(id: u64) u32;
extern fn zigConstructType(id: u64, args: ?*const anyopaque, args_len: u32) u32;
extern fn zigCleanupObject(id: u64) void;
};
pub const Value = extern struct {
tag: Tag,
val: extern union {
ref: u64,
num: f64,
bool: bool,
},
pub const Tag = enum(u8) {
object,
num,
bool,
str,
nulled,
undef,
func,
};
pub fn is(val: *const Value, comptime tag: Tag) bool {
return val.tag == tag;
}
pub fn view(val: *const Value, comptime tag: Tag) switch (tag) {
.object => Object,
.num => f64,
.bool => bool,
.str => String,
.func => Function,
.nulled, .undef => @compileError("Cannot get null or undefined as a value"),
} {
return switch (tag) {
.object => Object{ .ref = val.val.ref },
.num => val.val.num,
.bool => val.val.bool,
.str => String{ .ref = val.val.ref },
.func => Function{ .ref = val.val.ref },
else => unreachable,
};
}
pub fn eql(val: *const Value, other: Value) bool {
if (val.tag != other.tag)
return false;
return switch (val.tag) {
.num => val.val.num == other.val.num,
.bool => val.val.bool == other.val.bool,
// Using JS equality (===) is better here since lets say a ref can be dangling
else => js.zigValueEqual(val, &other),
};
}
pub fn instanceOf(val: *const Value, other: Value) bool {
return js.zigValueInstanceOf(val, &other);
}
pub fn format(val: *const Value, comptime _: []const u8, _: std.fmt.FormatOptions, writer: anytype) !void {
switch (val.tag) {
.object => try writer.print("Object@{}({})", .{ val.val.ref, val.view(.object).attributeCount() }),
.num => if (val.val.num > 10000)
try writer.print("{e}", .{val.val.num})
else
try writer.print("{d}", .{val.val.num}),
.bool => try writer.writeAll(if (val.view(.bool)) "true" else "false"),
.str => try writer.print("String@{}({})", .{ val.val.ref, val.view(.str).getLength() }),
.func => try writer.print("Function@{}({})", .{ val.val.ref, val.view(.func).paramCount() }),
.nulled => try writer.writeAll("null"),
.undef => try writer.writeAll("undefined"),
}
}
};
pub const Object = struct {
ref: u64,
pub fn deinit(obj: *const Object) void {
js.zigCleanupObject(obj.ref);
}
pub fn toValue(obj: *const Object) Value {
return .{ .tag = .object, .val = .{ .ref = obj.ref } };
}
pub fn attributeCount(obj: *const Object) usize {
return js.zigGetAttributeCount(obj.ref);
}
pub fn get(obj: *const Object, prop: []const u8) Value {
var ret: Value = undefined;
js.zigGetProperty(obj.ref, prop.ptr, @intCast(u32, prop.len), &ret);
return ret;
}
pub fn set(obj: *const Object, prop: []const u8, value: Value) void {
js.zigSetProperty(obj.ref, prop.ptr, @intCast(u32, prop.len), &value);
}
pub fn delete(obj: *const Object, prop: []const u8) void {
js.zigDeleteProperty(obj.ref, prop.ptr, @intCast(u32, prop.len));
}
pub fn getIndex(obj: *const Object, index: u32) Value {
var ret: Value = undefined;
js.zigGetIndex(obj.ref, index, &ret);
return ret;
}
pub fn setIndex(obj: *const Object, index: u32, value: Value) void {
js.zigSetIndex(obj.ref, index, &value);
}
pub fn deleteIndex(obj: *const Object, index: u32) void {
js.zigDeleteIndex(obj.ref, index);
}
pub fn call(obj: *const Object, fun: []const u8, args: []const Value) Value {
var ret: Value = undefined;
js.zigFunctionCall(obj.ref, fun.ptr, fun.len, args.ptr, args.len, &ret);
return ret;
}
};
pub const Function = struct {
ref: u64,
pub fn deinit(func: *const Function) void {
js.zigCleanupObject(func.ref);
}
pub fn toValue(func: *const Function) Value {
return .{ .tag = .func, .val = .{ .ref = func.ref } };
}
pub fn paramCount(func: *const Function) usize {
// FIXME: native functions would always return 0
return js.zigGetParamCount(func.ref);
}
pub fn construct(func: *const Function, args: []const Value) Object {
return .{ .ref = js.zigConstructType(func.ref, args.ptr, args.len) };
}
pub fn invoke(func: *const Function, args: []const Value) Value {
var ret: Value = undefined;
js.zigFunctionInvoke(func.ref, args.ptr, args.len, &ret);
return ret;
}
};
pub const String = struct {
ref: u64,
pub fn deinit(string: *const String) void {
js.zigCleanupObject(string.ref);
}
pub fn toValue(string: *const String) Value {
return .{ .tag = .str, .val = .{ .ref = string.ref } };
}
pub fn getLength(string: *const String) usize {
return js.zigGetStringLength(string.ref);
}
pub fn getOwnedSlice(string: *const String, allocator: std.mem.Allocator) ![]const u8 {
var slice = try allocator.alloc(u8, string.getLength());
errdefer allocator.free(slice);
js.zigGetString(string.ref, slice.ptr);
return slice;
}
};
export fn wasmCallFunction(id: *anyopaque, args: u32, len: u32) void {
const obj = Object{ .ref = args };
if (builtin.zig_backend == .stage1) {
obj.set("return_value", functions.items[@ptrToInt(id) - 1](obj, len));
} else {
var func = @ptrCast(*FunType, @alignCast(std.meta.alignment(*FunType), id));
obj.set("return_value", func(obj, len));
}
}
pub fn global() Object {
return Object{ .ref = 0 };
}
pub fn createMap() Object {
return .{ .ref = js.zigCreateMap() };
}
pub fn createArray() Object {
return .{ .ref = js.zigCreateArray() };
}
pub fn createString(string: []const u8) String {
return .{ .ref = js.zigCreateString(string.ptr, string.len) };
}
pub fn createNumber(num: f64) Value {
return .{ .tag = .num, .val = .{ .num = num } };
}
pub fn createBool(val: bool) Value {
return .{ .tag = .bool, .val = .{ .bool = val } };
}
pub fn createNull() Value {
return .{ .tag = .nulled, .val = undefined };
}
pub fn createUndefined() Value {
return .{ .tag = .undef, .val = undefined };
}
const FunType = fn (args: Object, args_len: u32) Value;
var functions: std.ArrayListUnmanaged(FunType) = .{};
pub fn createFunction(fun: FunType) Function {
if (builtin.zig_backend == .stage1) {
functions.append(std.heap.page_allocator, fun) catch unreachable;
return .{ .ref = js.zigCreateFunction(@intToPtr(*anyopaque, functions.items.len)) };
}
return .{ .ref = js.zigCreateFunction(&fun) };
}
pub fn constructType(t: []const u8, args: []const Value) Object {
const constructor = global().get(t).view(.func);
defer constructor.deinit();
return constructor.construct(args);
}