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fix readable slice bug (and add tests)

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rgreenblatt 2021-02-13 20:17:09 -05:00 committed by Veikka Tuominen
parent 340825a7af
commit f9be7471bc
1 changed files with 3 additions and 1 deletions
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4
lib/std/fifo.zig
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@ -153,7 +153,7 @@ pub fn LinearFifo(
var start = self.head + offset;
if (start >= self.buf.len) {
start -= self.buf.len;
return self.buf[start .. self.count - offset];
return self.buf[start .. start + (self.count - offset)];
} else {
const end = math.min(self.head + self.count, self.buf.len);
return self.buf[start..end];
@ -427,6 +427,8 @@ test "LinearFifo(u8, .Dynamic)" {
fifo.writeAssumeCapacity("6<chars<11");
testing.expectEqualSlices(u8, "HELLO6<char", fifo.readableSlice(0));
testing.expectEqualSlices(u8, "s<11", fifo.readableSlice(11));
testing.expectEqualSlices(u8, "11", fifo.readableSlice(13));
testing.expectEqualSlices(u8, "", fifo.readableSlice(15));
fifo.discard(11);
testing.expectEqualSlices(u8, "s<11", fifo.readableSlice(0));
fifo.discard(4);