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// Integers only
struct RangeValue {
i64 lo;
i64 hi;
};
struct RangeCache {
Array<RangeValue> ranges;
};
gb_internal RangeCache range_cache_make(gbAllocator a) {
RangeCache cache = {};
array_init(&cache.ranges, a);
return cache;
}
gb_internal void range_cache_destroy(RangeCache *c) {
array_free(&c->ranges);
}
gb_internal bool range_cache_add_index(RangeCache *c, i64 index) {
for_array(i, c->ranges) {
RangeValue v = c->ranges[i];
if (v.lo <= index && index <= v.hi) {
return false;
}
}
RangeValue v = {index, index};
array_add(&c->ranges, v);
return true;
}
gb_internal bool range_cache_add_range(RangeCache *c, i64 lo, i64 hi) {
GB_ASSERT(lo <= hi);
for_array(i, c->ranges) {
RangeValue v = c->ranges[i];
if (hi < v.lo) {
continue;
}
if (lo > v.hi) {
continue;
}
if (v.hi < hi) {
v.hi = hi;
}
if (lo < v.lo) {
v.lo = lo;
}
c->ranges[i] = v;
return false;
}
RangeValue v = {lo, hi};
array_add(&c->ranges, v);
return true;
}
gb_internal bool range_cache_index_exists(RangeCache *c, i64 index) {
for_array(i, c->ranges) {
RangeValue v = c->ranges[i];
if (v.lo <= index && index <= v.hi) {
return true;
}
}
return false;
}
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