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Improved RangeSet implementation

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johannesd3 2021-01-21 22:13:09 +01:00
parent 80d384e001
commit 90905b81bb
1 changed files with 8 additions and 12 deletions
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20
audio/src/range_set.rs
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@ -54,11 +54,7 @@ impl RangeSet {
} }
pub fn len(&self) -> usize { pub fn len(&self) -> usize {
let mut result = 0; self.ranges.iter().map(|r| r.length).fold(0, std::ops::Add::add)
for range in self.ranges.iter() {
result += range.length;
}
return result;
} }
pub fn get_range(&self, index: usize) -> Range { pub fn get_range(&self, index: usize) -> Range {
@ -98,12 +94,12 @@ impl RangeSet {
return false; return false;
} }
} }
return true; true
} }
pub fn add_range(&mut self, range: &Range) { pub fn add_range(&mut self, range: &Range) {
if range.length <= 0 { if range.length == 0 {
// the interval is empty or invalid -> nothing to do. // the interval is empty -> nothing to do.
return; return;
} }
@ -111,7 +107,7 @@ impl RangeSet {
// the new range is clear of any ranges we already iterated over. // the new range is clear of any ranges we already iterated over.
if range.end() < self.ranges[index].start { if range.end() < self.ranges[index].start {
// the new range starts after anything we already passed and ends before the next range starts (they don't touch) -> insert it. // the new range starts after anything we already passed and ends before the next range starts (they don't touch) -> insert it.
self.ranges.insert(index, range.clone()); self.ranges.insert(index, *range);
return; return;
} else if range.start <= self.ranges[index].end() } else if range.start <= self.ranges[index].end()
&& self.ranges[index].start <= range.end() && self.ranges[index].start <= range.end()
@ -119,7 +115,7 @@ impl RangeSet {
// the new range overlaps (or touches) the first range. They are to be merged. // the new range overlaps (or touches) the first range. They are to be merged.
// In addition we might have to merge further ranges in as well. // In addition we might have to merge further ranges in as well.
let mut new_range = range.clone(); let mut new_range = *range;
while index < self.ranges.len() && self.ranges[index].start <= new_range.end() { while index < self.ranges.len() && self.ranges[index].start <= new_range.end() {
let new_end = max(new_range.end(), self.ranges[index].end()); let new_end = max(new_range.end(), self.ranges[index].end());
@ -134,7 +130,7 @@ impl RangeSet {
} }
// the new range is after everything else -> just add it // the new range is after everything else -> just add it
self.ranges.push(range.clone()); self.ranges.push(*range);
} }
#[allow(dead_code)] #[allow(dead_code)]
@ -152,7 +148,7 @@ impl RangeSet {
} }
pub fn subtract_range(&mut self, range: &Range) { pub fn subtract_range(&mut self, range: &Range) {
if range.length <= 0 { if range.length == 0 {
return; return;
} }