Ревізії Parse_words.zig

sotolf2 ревизій цього gist 1720079874. До ревизії

1 file changed, 78 insertions

Parse_words.zig(файл створено)

		@@ -0,0 +1,78 @@
1	+	const std = @import("std");
2	+	const mem = std.mem;
3	+	const fs = std.fs;
4	+	const print = std.debug.print;
5	+
6	+	const ParseError = error{
7	+	RanOutOfWords,
8	+	};
9	+
10	+	const Parser = struct {
11	+	it: mem.SplitIterator(u8, .scalar),
12	+
13	+	fn fromString(str: []const u8) Parser {
14	+	return Parser{
15	+	.it = mem.splitScalar(u8, str, ' '),
16	+	};
17	+	}
18	+
19	+	fn take(self: *Parser) ![]const u8 {
20	+	const wordo = self.it.next();
21	+	if (wordo) \|word\| {
22	+	return word;
23	+	} else {
24	+	return ParseError.RanOutOfWords;
25	+	}
26	+	}
27	+
28	+	fn skip(self: *Parser, cnt: usize) void {
29	+	for (0..cnt) \|_\| {
30	+	_ = self.it.next();
31	+	}
32	+	}
33	+
34	+	fn takeAsNumber(self: *Parser, Type: type) !Type {
35	+	const wordo = self.it.next();
36	+	if (wordo) \|word\| {
37	+	return std.fmt.parseInt(Type, word, 10);
38	+	} else {
39	+	return ParseError.RanOutOfWords;
40	+	}
41	+	}
42	+	};
43	+
44	+	const Raindeer = struct {
45	+	speed: usize,
46	+	flight: usize,
47	+	rest: usize,
48	+	};
49	+
50	+	fn getLines(path: []const u8, alloc: mem.Allocator) !std.ArrayList(Raindeer) {
51	+	const file = fs.cwd().openFile(path, .{}) catch \|err\| {
52	+	std.log.err("Failed to open file {s}", .{@errorName(err)});
53	+	return err;
54	+	};
55	+	defer file.close();
56	+
57	+	var raindeer = std.ArrayList(Raindeer).init(alloc);
58	+
59	+	while (file.reader().readUntilDelimiterOrEofAlloc(alloc, '\n', std.math.maxInt(usize)) catch \|err\| {
60	+	std.log.err("Failed to read line: {s}", .{@errorName(err)});
61	+	return err;
62	+	}) \|line\| {
63	+	defer alloc.free(line);
64	+	var words = Parser.fromString(line);
65	+	words.skip(3);
66	+	const speed = try words.takeAsNumber(usize);
67	+	words.skip(2);
68	+	const flight = try words.takeAsNumber(usize);
69	+	words.skip(6);
70	+	const rest = try words.takeAsNumber(usize);
71	+	try raindeer.append(.{
72	+	.speed = speed,
73	+	.flight = flight,
74	+	.rest = rest,
75	+	});
76	+	}
77	+	return raindeer;
78	+	}

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