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improved timestamp comparison

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This commit is contained in:
Chris Boesch
2026-04-03 19:07:10 +02:00
parent 1c6487c1e7
commit 7fae6e0607
1 changed files with 15 additions and 6 deletions
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21
build.zig
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@@ -436,17 +436,29 @@ const ZiglingStep = struct {
else
result.stderr;
// NOTE: exercise.output can never contain a CR character.
// See https://ziglang.org/documentation/master/#Source-Encoding.
const output = trimLines(b.allocator, raw_output) catch @panic("OOM");
// Validate the output.
var exercise_output = self.exercise.output;
// Insert timestamp for exercise 84
// Insert timestamp for exercise 85
if (self.exercise.timestamp) {
var ts_buf: [20]u8 = undefined;
const timestamp = std.fmt.bufPrint(&ts_buf, "{}", .{std.Io.Timestamp.now(io, .real).toSeconds()}) catch unreachable;
// Compare timestamp from exercise with now, diff < 5 seconds is valid
var ts_buf: [20]u8 = undefined;
const ts_slice = output[14..24];
const ts_value = try std.fmt.parseInt(i64, ts_slice, 10);
const ts_build = std.Io.Timestamp.now(io, .real).toSeconds();
const ts_diff = @abs(ts_build - ts_value);
const timestamp = std.fmt.bufPrint(&ts_buf, "{}", .{if (ts_diff < 5) ts_value else ts_build}) catch unreachable;
// Insert timestamp into check string
var buf: [100]u8 = undefined;
const prefix_len = 14;
const placeholder_len = 11;
@memcpy(buf[0..prefix_len], exercise_output[0..prefix_len]);
@memcpy(buf[prefix_len..][0..timestamp.len], timestamp);
const suffix = exercise_output[prefix_len + placeholder_len ..];
@@ -457,9 +469,6 @@ const ZiglingStep = struct {
exercise_output = buf[0..total_len];
}
// NOTE: exercise.output can never contain a CR character.
// See https://ziglang.org/documentation/master/#Source-Encoding.
const output = trimLines(b.allocator, raw_output) catch @panic("OOM");
if (!std.mem.eql(u8, output, exercise_output)) {
const red = red_bold_text;
const reset = reset_text;