it is poggers now
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1 changed files with 139 additions and 79 deletions
186
bf.zig
186
bf.zig
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@ -15,10 +15,16 @@ const Level1 = union(enum) {
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// well, might as well use the extra space (union is bigger than its biggest member)
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in: u16,
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out: u16,
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loop_start,
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loop_end,
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// u24s because i arbitrarily chose 2^24 as the limit
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// maybe u32 would be more efficient idk this union should fit in a u32
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// hm we can probably go way lower bc level1 is so much more compact than prog_unfiltered
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// shouldn't be necessary
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loop_start: u24,
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loop_end: u24,
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const Self = @This();
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fn pointless(self: Self) bool {
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return switch (self) {
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.inc, .shift => |n| n == 0,
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@ -26,127 +32,181 @@ const Level1 = union(enum) {
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else => false,
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};
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}
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};
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const Level2 = union(enum) {
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inc: i16,
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shift: i16,
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in: u16,
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out: u16,
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// only difference
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// u24s because i arbitrarily chose 2^24 as the limit
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// maybe u32 would be more efficient idk this union should fit in a u32
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// hm we can probably go way lower bc level1 is so much more compact than prog_unfiltered
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// shouldn't be necessary
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loop_start: u24,
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loop_end: u24,
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fn nothing() Self {
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return .{ .inc = 0 };
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}
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// the default fmt is human and machine readable..... but idc xd lol pog
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pub fn format(
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self: Self,
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comptime fmt: []const u8,
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options: std.fmt.FormatOptions,
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writer: anytype,
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) !void {
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_ = fmt;
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_ = options;
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switch (self) {
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.inc => |n| try writer.print("INC {d: >4}", .{n}),
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.shift => |n| try writer.print("SHF {d: >4}", .{n}),
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.in => |n| try writer.print("INP {d: >4}", .{n}),
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.out => |n| try writer.print("OUT {d: >4}", .{n}),
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.loop_start => |n| try writer.print("JEZ {d:0>4}", .{n}),
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.loop_end => |n| try writer.print("JNZ {d:0>4}", .{n}),
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}
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}
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};
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// we'll do the discarding of comment chars here
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fn compileLevel1(allocator: mem.Allocator, src: []const u8) !ArrayList(Level1) {
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var cur: ?Level1 = null;
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var cur = Level1.nothing();
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var out = ArrayList(Level1).init(allocator);
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var openers = ArrayList(u24).init(allocator);
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errdefer {
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out.deinit();
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openers.deinit();
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}
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for (src) |b| {
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switch (b) {
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'+', '-' => {
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const n: i16 = if (b == '+') 1 else -1;
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if (cur) |*ins| {
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switch (ins.*) {
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switch (cur) {
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.inc => |*ns| ns.* += n,
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else => {
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if (!ins.pointless()) try out.append(ins.*);
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if (!cur.pointless()) try out.append(cur);
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cur = .{ .inc = n };
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},
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}
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} else {
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cur = .{ .inc = n };
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}
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},
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'>', '<' => {
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const n: i16 = if (b == '>') 1 else -1;
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if (cur) |*ins| {
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switch (ins.*) {
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switch (cur) {
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.shift => |*ns| ns.* += n,
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else => {
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if (!ins.pointless()) try out.append(ins.*);
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if (!cur.pointless()) try out.append(cur);
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cur = .{ .shift = n };
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},
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}
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} else {
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cur = .{ .shift = n };
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}
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},
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'[', ']' => {
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if (cur) |ins| {
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if (!ins.pointless()) try out.append(ins);
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cur = null;
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}
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try out.append(if (b == '[') .loop_start else .loop_end);
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'[' => {
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if (!cur.pointless()) try out.append(cur);
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cur = .{ .loop_start = 0 };
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try openers.append(@as(u24, @truncate(out.items.len)));
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},
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']' => {
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if (!cur.pointless()) try out.append(cur);
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const opener_idx = openers.popOrNull() orelse return error.UnopenedCloser;
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out.items[opener_idx].loop_start = @as(u24, @truncate(out.items.len));
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cur = .{ .loop_end = opener_idx };
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},
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',' => {
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if (cur) |*ins| {
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switch (ins.*) {
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switch (cur) {
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.in => |*ns| ns.* += 1,
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else => {
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if (!ins.pointless()) try out.append(ins.*);
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if (!cur.pointless()) try out.append(cur);
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cur = .{ .in = 1 };
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},
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}
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} else {
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cur = .{ .in = 1 };
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}
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},
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'.' => {
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if (cur) |*ins| {
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switch (ins.*) {
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switch (cur) {
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.out => |*ns| ns.* += 1,
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else => {
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if (!ins.pointless()) try out.append(ins.*);
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if (!cur.pointless()) try out.append(cur);
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cur = .{ .out = 1 };
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},
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}
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} else {
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cur = .{ .out = 1 };
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}
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},
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else => {},
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}
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}
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if (cur) |ins| {
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if (!ins.pointless()) try out.append(ins);
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}
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if (!cur.pointless()) try out.append(cur);
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const unclosed_openers = openers.items.len;
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if (unclosed_openers > 0) return error.UnclosedOpener;
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openers.deinit();
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return out;
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}
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test "level 1" {
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const src = "+++-- [ >><<< +- ] ...,,,";
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fn testLevel1(src: []const u8, expected: []const Level1) !void {
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const level1 = try compileLevel1(testing.allocator, src);
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defer level1.deinit();
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std.debug.print("{any}\n", .{level1.items});
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errdefer {
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std.debug.print("{s}\n", .{src});
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std.debug.print(" OBTAINED EXPECTED\n", .{});
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if (level1.items.len < expected.len) {
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for (level1.items, expected[0..level1.items.len], 0..) |a, b, i| {
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std.debug.print("{:0>4}: {} {}\n", .{ i, a, b });
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}
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for (expected[level1.items.len..], level1.items.len..) |b, i| {
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std.debug.print("{:0>4}: -------- {}\n", .{ i, b });
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}
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} else {
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for (level1.items[0..expected.len], expected, 0..) |a, b, i| {
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std.debug.print("{:0>4}: {} {}\n", .{ i, a, b });
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}
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for (level1.items[expected.len..], expected.len..) |a, i| {
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std.debug.print("{:0>4}: {} --------\n", .{ i, a });
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}
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}
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}
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const should_be = [_]Level1{
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.{ .inc = 1 },
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.loop_start,
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.{ .shift = -1 },
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.loop_end,
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.{ .out = 3 },
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.{ .in = 3 },
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};
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try testing.expectEqual(should_be.len, level1.items.len);
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try testing.expectEqual(expected.len, level1.items.len);
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for (
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level1.items,
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&should_be,
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expected,
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) |a, b| {
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try testing.expectEqual(a, b);
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}
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}
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test "level 1" {
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try testLevel1(
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"+++-- [ >><<< +- ] ...,,,",
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&[_]Level1{
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.{ .inc = 1 },
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.{ .loop_start = 3 },
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.{ .shift = -1 },
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.{ .loop_end = 1 },
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.{ .out = 3 },
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.{ .in = 3 },
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},
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);
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try testLevel1(
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\\ 0 [
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\\ 1 [
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\\ 2 ]
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\\ 3 [
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\\ 4 [
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\\ 5 ]
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\\ 6 [
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\\ 7 ]
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\\ 8 ]
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\\ 9 ]
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,
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&[_]Level1{
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.{ .loop_start = 9 },
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.{ .loop_start = 2 },
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.{ .loop_end = 1 },
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.{ .loop_start = 8 },
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.{ .loop_start = 5 },
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.{ .loop_end = 4 },
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.{ .loop_start = 7 },
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.{ .loop_end = 6 },
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.{ .loop_end = 3 },
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.{ .loop_end = 0 },
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},
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);
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testLevel1("bla bla - [ ++ ", &[_]Level1{}) catch |err| try testing.expectEqual(err, error.UnclosedOpener);
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testLevel1("wow wow += ]", &[_]Level1{}) catch |err| try testing.expectEqual(err, error.UnopenedCloser);
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}
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pub fn main() !void {
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var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
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var allocator = arena.allocator();
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