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Implement Bytecode Executor for Kym #19

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kayomn merged 9 commits from kym-bytecode-executor into main 2023-07-12 02:58:03 +02:00
Conversation 0 Commits 9 Files Changed 33 +245 -175
4 changed files with 245 additions and 175 deletions
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Showing only changes of commit 8d361634d7 - Show all commits

8
source/ona/app.zig
View File

@ -21,14 +21,14 @@ pub const Manifest = struct {
defer env.discard(title);
const title_string = try env.to_string(title);
const title_string = try env.get_string(title);
const width = @as(u16, get: {
const ref = try env.get_field(manifest, "width");
defer env.discard(ref);
break: get @intFromFloat(env.to_float(ref) catch @as(f64, @floatFromInt(self.width)));
break: get @intFromFloat(env.get_float(ref) catch @as(f64, @floatFromInt(self.width)));
});
const height = @as(u16, get: {
@ -36,7 +36,7 @@ pub const Manifest = struct {
defer env.discard(ref);
break: get @intFromFloat(env.to_float(ref) catch @as(f64, @floatFromInt(self.height)));
break: get @intFromFloat(env.get_float(ref) catch @as(f64, @floatFromInt(self.height)));
});
const tick_rate = @as(f32, get: {
@ -44,7 +44,7 @@ pub const Manifest = struct {
defer env.discard(ref);
break: get @floatCast(env.to_float(ref) catch self.tick_rate);
break: get @floatCast(env.get_float(ref) catch self.tick_rate);
});
{

292
source/ona/kym.zig
View File

@ -2,6 +2,8 @@ const Ast = @import("./kym/Ast.zig");
const State = @import("./kym/State.zig");
const Table = @import("./kym/Table.zig");
const coral = @import("coral");
const file = @import("./file.zig");
@ -156,7 +158,7 @@ pub const ObjectInfo = struct {
call: *const fn (context: CallContext) RuntimeError!*RuntimeRef = default_call,
clean: *const fn (userdata: []u8) void = default_clean,
get: *const fn (context: IndexContext) RuntimeError!*RuntimeRef = default_get,
set: *const fn (context: IndexContext, Any: *const RuntimeRef) RuntimeError!void = default_set,
set: *const fn (context: IndexContext, value: *const RuntimeRef) RuntimeError!void = default_set,
fn cast(object_info: *const anyopaque) *const ObjectInfo {
return @ptrCast(@alignCast(object_info));
@ -219,119 +221,6 @@ pub const RuntimeEnv = struct {
data: []const coral.io.Byte,
};
const Table = struct {
state: *State,
fields: FieldTable,
array: ArrayList,
const ArrayList = coral.list.Stack(State.Variant);
const FieldTable = coral.map.Table([]const coral.io.Byte, struct {
field: *State.Object,
value: State.Variant,
const Self = @This();
fn release_objects(self: Self, state: *State) void {
state.release(self.field);
if (self.value == .object) {
state.release(self.value.object);
}
}
}, coral.map.string_table_traits);
fn free(self: *Table) void {
{
var field_iterator = FieldTable.Iterable{.table = &self.fields};
while (field_iterator.next()) |entry| {
entry.value.release_objects(self.state);
}
}
self.fields.free();
self.array.free();
}
fn get_field(self: *Table, field_name: *State.Object) State.Variant {
const field = self.fields.lookup(field_name.userdata) orelse return .nil;
if (field.value == .object) {
return .{.object = self.state.acquire_instance(field.value.object)};
}
return field.value;
}
fn get_index(self: *Table, index: usize) State.Variant {
return self.array.values[index];
}
fn make(allocator: coral.io.Allocator, state: *State) Table {
return .{
.state = state,
.fields = FieldTable.make(allocator),
.array = ArrayList.make(allocator),
};
}
const object_info = ObjectInfo{
.clean = struct {
fn clean(userdata: []u8) void {
@as(*Table, @ptrCast(@alignCast(userdata.ptr))).free();
}
}.clean,
.get = struct {
fn get(context: IndexContext) RuntimeError!*RuntimeRef {
const table = @as(*Table, @ptrCast(@alignCast(context.userdata.ptr)));
switch (try context.index.fetch(context.env)) {
.nil => return context.env.raise(error.BadOperation, "cannot index a table with nil"),
.true => return context.env.raise(error.BadOperation, "cannot index a table with true"),
.false => return context.env.raise(error.BadOperation, "cannot index a table with false"),
.object => |index_object| {
const value = table.get_field(index_object);
errdefer if (value == .object) {
context.env.state.release(value.object);
};
return @ptrFromInt(try context.env.bound_refs.insert(value));
},
.number => |index_number| {
const value = table.get_index(@intFromFloat(index_number));
errdefer if (value == .object) {
context.env.state.release(value.object);
};
return @ptrFromInt(try context.env.bound_refs.insert(value));
},
}
}
}.get,
};
fn set_field(self: *Table, field_name: *State.Object, value: State.Variant) coral.io.AllocationError!void {
const previous_entry = try self.fields.replace(field_name.userdata, .{
.field = field_name,
.value = value,
});
if (previous_entry) |entry| {
entry.value.release_objects(self.state);
}
}
fn set_index(self: *Table, index: usize, value: State.Variant) coral.io.AllocationError!void {
self.array.values[index] = value;
}
};
const VariantSlab = coral.map.Slab(State.Variant);
pub fn discard(self: *RuntimeEnv, ref: *RuntimeRef) void {
@ -358,14 +247,13 @@ pub const RuntimeEnv = struct {
var popped = @as(usize, 0);
while (popped < size) : (popped += 1) {
switch (try self.state.pop_value()) {
.object => |field| try table.set_field(field, try self.state.pop_value()),
else => return self.raise(error.BadOperation, "attempt to set a non-object field"),
}
try table.set_field(
try to_object(self, try self.state.pop_value()),
try self.state.pop_value());
}
}
const table_object = try self.state.acquire_new(coral.io.bytes_of(&table), &Table.object_info);
const table_object = try self.state.acquire_new(coral.io.bytes_of(&table), &table_info);
errdefer self.state.release(table_object);
@ -382,58 +270,79 @@ pub const RuntimeEnv = struct {
.not => {
try self.state.push_value(switch (try self.state.pop_value()) {
.nil => return self.raise(error.BadOperation, "cannot not nil"),
.nil => return self.raise(error.BadOperation, "cannot convert nil to true or false"),
.false => .true,
.true => .false,
.number => return self.raise(error.BadOperation, "cannot not a number"),
.object => return self.raise(error.BadOperation, "cannot not an object"),
.number => return self.raise(error.BadOperation, "cannot convert a number to true or false"),
.object => return self.raise(error.BadOperation, "cannot convert an object to true or false"),
});
},
.neg => {
try self.state.push_value(switch (try self.state.pop_value()) {
.nil => return self.raise(error.BadOperation, "cannot not nil"),
.false => return self.raise(error.BadOperation, "cannot not false"),
.true => return self.raise(error.BadOperation, "cannot not true"),
.number => |number| .{.number = -number},
.object => return self.raise(error.BadOperation, "cannot not an object"),
});
try self.state.push_value(.{.number = -(try to_number(self, try self.state.pop_value()))});
},
.add => {
const lhs_number = try to_number(self, try self.state.pop_value());
const rhs_number = try to_number(self, try self.state.pop_value());
try self.state.push_value(.{.number = lhs_number + rhs_number});
},
.sub => {
const lhs_number = try to_number(self, try self.state.pop_value());
const rhs_number = try to_number(self, try self.state.pop_value());
try self.state.push_value(.{.number = lhs_number - rhs_number});
},
.mul => {
const lhs_number = try to_number(self, try self.state.pop_value());
const rhs_number = try to_number(self, try self.state.pop_value());
try self.state.push_value(.{.number = lhs_number * rhs_number});
},
.div => {
const lhs_number = try to_number(self, try self.state.pop_value());
const rhs_number = try to_number(self, try self.state.pop_value());
try self.state.push_value(.{.number = lhs_number / rhs_number});
},
.eql => {
const lhs = try self.state.pop_value();
const rhs = try self.state.pop_value();
try self.state.push_value(if (lhs.equals(rhs)) .true else .false);
},
.cgt => {
const lhs_number = try to_number(self, try self.state.pop_value());
const rhs_number = try to_number(self, try self.state.pop_value());
try self.state.push_value(if (lhs_number > rhs_number) .true else .false);
},
.clt => {
const lhs_number = try to_number(self, try self.state.pop_value());
const rhs_number = try to_number(self, try self.state.pop_value());
try self.state.push_value(if (lhs_number < rhs_number) .true else .false);
},
.cge => {
const lhs_number = try to_number(self, try self.state.pop_value());
const rhs_number = try to_number(self, try self.state.pop_value());
try self.state.push_value(if (lhs_number >= rhs_number) .true else .false);
},
.cle => {
const lhs_number = try to_number(self, try self.state.pop_value());
const rhs_number = try to_number(self, try self.state.pop_value());
try self.state.push_value(if (lhs_number <= rhs_number) .true else .false);
},
}
}
@ -495,7 +404,7 @@ pub const RuntimeEnv = struct {
defer self.discard(interned_field);
const indexable_object = try indexable.fetch_object(self);
const indexable_object = try to_object(self, try indexable.fetch(self));
return ObjectInfo.cast(indexable_object.userinfo).get(.{
.env = self,
@ -505,6 +414,20 @@ pub const RuntimeEnv = struct {
});
}
pub fn get_float(self: *RuntimeEnv, ref: *const RuntimeRef) RuntimeError!State.Float {
return to_number(self, try ref.fetch(self));
}
pub fn get_string(self: *RuntimeEnv, ref: *const RuntimeRef) RuntimeError![]const u8 {
const object = try to_object(self, try ref.fetch(self));
if (ObjectInfo.cast(object.userinfo) != &string_info) {
return self.raise(error.BadOperation, "object is not a string");
}
return object.userdata;
}
pub fn intern(self: *RuntimeEnv, data: []const u8) RuntimeError!*RuntimeRef {
const data_object = try self.state.acquire_interned(data, &string_info);
@ -532,10 +455,6 @@ pub const RuntimeEnv = struct {
return @ptrFromInt(try self.bound_refs.insert(.{.object = data_object}));
}
pub fn nil(self: *RuntimeEnv) RuntimeError!*RuntimeRef {
return @ptrFromInt(try self.bound_refs.insert(.nil));
}
pub fn raise(self: *RuntimeEnv, runtime_error: RuntimeError, error_message: []const u8) RuntimeError {
if (self.err_writer.invoke(error_message) == null) {
return error.SystemFailure;
@ -543,23 +462,6 @@ pub const RuntimeEnv = struct {
return runtime_error;
}
pub fn to_float(self: *RuntimeEnv, ref: *const RuntimeRef) RuntimeError!State.Float {
return ref.fetch_number(self);
}
pub fn to_string(self: *RuntimeEnv, ref: *const RuntimeRef) RuntimeError![]const u8 {
const object = try switch (try ref.fetch(self)) {
.object => |object| object,
else => self.raise(error.BadOperation, "cannot convert to object"),
};
if (ObjectInfo.cast(object.userinfo) != &string_info) {
return self.raise(error.BadOperation, "object is not a string");
}
return object.userdata;
}
};
pub const RuntimeError = coral.io.AllocationError || State.PopError || error {
@ -572,27 +474,101 @@ pub const RuntimeRef = opaque {
fn fetch(self: *const RuntimeRef, env: *RuntimeEnv) RuntimeError!State.Variant {
return env.bound_refs.lookup(@intFromPtr(self)) orelse env.raise(error.BadOperation, "stale ref");
}
};
fn fetch_number(self: *const RuntimeRef, env: *RuntimeEnv) RuntimeError!State.Float {
return switch (try self.fetch(env)) {
fn table_clean(userdata: []u8) void {
@as(*Table, @ptrCast(@alignCast(userdata.ptr))).free();
}
fn table_get(context: IndexContext) RuntimeError!*RuntimeRef {
const table = @as(*Table, @ptrCast(@alignCast(context.userdata.ptr)));
switch (try context.index.fetch(context.env)) {
.nil => return context.env.raise(error.BadOperation, "cannot index a table with nil"),
.true => return context.env.raise(error.BadOperation, "cannot index a table with true"),
.false => return context.env.raise(error.BadOperation, "cannot index a table with false"),
.object => |index_object| {
const value = table.get_field(index_object);
errdefer if (value == .object) {
context.env.state.release(value.object);
};
return @ptrFromInt(try context.env.bound_refs.insert(value));
},
.number => |index_number| {
const value = table.get_index(@intFromFloat(index_number));
errdefer if (value == .object) {
context.env.state.release(value.object);
};
return @ptrFromInt(try context.env.bound_refs.insert(value));
},
}
}
const table_info = ObjectInfo{
.clean = table_clean,
.get = table_get,
.set = table_set,
};
fn table_set(context: IndexContext, value: *const RuntimeRef) RuntimeError!void {
const table = @as(*Table, @ptrCast(@alignCast(context.userdata.ptr)));
switch (try context.index.fetch(context.env)) {
.nil => return context.env.raise(error.BadOperation, "cannot index a table with nil"),
.true => return context.env.raise(error.BadOperation, "cannot index a table with true"),
.false => return context.env.raise(error.BadOperation, "cannot index a table with false"),
.object => |index_object| {
const fetched_value = try value.fetch(context.env);
if (fetched_value == .object) {
try table.set_field(index_object, .{
.object = context.env.state.acquire_instance(fetched_value.object),
});
} else {
try table.set_field(index_object, fetched_value);
}
},
.number => |index_number| {
const fetched_value = try value.fetch(context.env);
if (fetched_value == .object) {
try table.set_index(@intFromFloat(index_number), .{
.object = context.env.state.acquire_instance(fetched_value.object),
});
} else {
try table.set_index(@intFromFloat(index_number), fetched_value);
}
},
}
}
fn to_number(env: *RuntimeEnv, variant: State.Variant) RuntimeError!State.Float {
return switch (variant) {
.nil => env.raise(error.BadOperation, "cannot convert nil to number"),
.true => env.raise(error.BadOperation, "cannot convert true to number"),
.false => env.raise(error.BadOperation, "cannot convert false to number"),
.number => |number| number,
.object => env.raise(error.BadOperation, "cannot convert object to number"),
};
}
}
fn fetch_object(self: *const RuntimeRef, env: *RuntimeEnv) RuntimeError!*State.Object {
return switch (try self.fetch(env)) {
fn to_object(env: *RuntimeEnv, variant: State.Variant) RuntimeError!*State.Object {
return switch (variant) {
.nil => env.raise(error.BadOperation, "cannot convert nil to object"),
.true => env.raise(error.BadOperation, "cannot convert true to object"),
.false => env.raise(error.BadOperation, "cannot convert false to object"),
.number => env.raise(error.BadOperation, "cannot convert number to object"),
.object => |object| object,
};
}
};
}
const string_info = ObjectInfo{

18
source/ona/kym/State.zig
View File

@ -36,6 +36,24 @@ pub const Variant = union (enum) {
false,
number: Float,
object: *Object,
pub fn equals(self: Variant, other: Variant) bool {
return switch (self) {
.nil => other == .nil,
.true => other == .true,
.false => other == .false,
.number => |number| switch (other) {
.number => |other_number| number == other_number,
else => false,
},
.object => |object| switch (other) {
.object => |other_object| object == other_object,
else => false,
},
};
}
};
pub fn acquire_instance(_: *Self, object: *Object) *Object {

76
source/ona/kym/Table.zig Normal file
View File

@ -0,0 +1,76 @@
const State = @import("./State.zig");
const coral = @import("coral");
state: *State,
fields: FieldTable,
array: ArrayList,
const ArrayList = coral.list.Stack(State.Variant);
const Field = struct {
field: *State.Object,
value: State.Variant,
fn release_objects(self: Field, state: *State) void {
state.release(self.field);
if (self.value == .object) {
state.release(self.value.object);
}
}
};
const FieldTable = coral.map.Table([]const coral.io.Byte, Field, coral.map.string_table_traits);
const Self = @This();
pub fn free(self: *Self) void {
{
var field_iterator = FieldTable.Iterable{.table = &self.fields};
while (field_iterator.next()) |entry| {
entry.value.release_objects(self.state);
}
}
self.fields.free();
self.array.free();
}
pub fn get_field(self: *Self, field_name: *State.Object) State.Variant {
const field = self.fields.lookup(field_name.userdata) orelse return .nil;
if (field.value == .object) {
return .{.object = self.state.acquire_instance(field.value.object)};
}
return field.value;
}
pub fn get_index(self: *Self, index: usize) State.Variant {
return self.array.values[index];
}
pub fn make(allocator: coral.io.Allocator, state: *State) Self {
return .{
.state = state,
.fields = FieldTable.make(allocator),
.array = ArrayList.make(allocator),
};
}
pub fn set_field(self: *Self, field_name: *State.Object, value: State.Variant) coral.io.AllocationError!void {
const previous_entry = try self.fields.replace(field_name.userdata, .{
.field = field_name,
.value = value,
});
if (previous_entry) |entry| {
entry.value.release_objects(self.state);
}
}
pub fn set_index(self: *Self, index: usize, value: State.Variant) coral.io.AllocationError!void {
self.array.values[index] = value;
}