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revamped HashRange

master
Daniel Kolesa 2015-06-16 01:24:19 +01:00
parent aa2a0afcc1
commit 8324f5f9cc
1 changed files with 25 additions and 32 deletions
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57
octa/internal/hashtable.h
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@ -28,49 +28,41 @@ struct HashRange: octa::InputRange<HashRange<T>, octa::ForwardRangeTag, T> {
private:
using Chain = octa::detail::HashChain<T>;
Chain **p_chains;
Chain **p_beg;
Chain **p_end;
Chain *p_node;
octa::Size p_num;
void advance() {
while (p_num > 0 && !p_chains[0]) {
--p_num;
++p_chains;
}
if (p_num > 0) {
p_node = p_chains[0];
--p_num;
++p_chains;
} else {
p_node = nullptr;
while ((p_beg != p_end) && !p_beg[0])
++p_beg;
if (p_beg != p_end) {
p_node = p_beg[0];
++p_beg;
}
}
public:
HashRange(): p_chains(), p_num(0) {}
HashRange(Chain **ch, octa::Size n): p_chains(ch), p_num(n) {
HashRange(): p_beg(), p_end(), p_node() {}
HashRange(const HashRange &v): p_beg(v.p_beg), p_end(v.p_end),
p_node(v.p_node) {}
HashRange(Chain **beg, Chain **end): p_beg(beg), p_end(end), p_node() {
advance();
}
HashRange(Chain **ch, Chain *node, octa::Size n): p_chains(ch),
p_node(node), p_num(n) {}
HashRange(const HashRange &v): p_chains(v.p_chains), p_node(v.p_node),
p_num(v.p_num) {}
HashRange(Chain **beg, Chain **end, Chain *node): p_beg(beg), p_end(end),
p_node(node) {}
HashRange &operator=(const HashRange &v) {
p_chains = v.p_chains;
p_beg = v.p_beg;
p_end = v.p_end;
p_node = v.p_node;
p_num = v.p_num;
return *this;
}
bool empty() const { return !p_node && p_num <= 0; }
bool empty() const { return !p_node; }
bool pop_front() {
if (empty()) return false;
if (p_node->next) {
p_node = p_node->next;
return true;
}
p_node = nullptr;
if (!p_node) return false;
p_node = p_node->next;
if (p_node) return true;
advance();
return true;
}
@ -281,8 +273,9 @@ namespace detail {
found = insert(h);
B::swap_elem(found->value, elem);
}
return octa::make_pair(Range(&p_data.first()[h + 1], found,
bucket_count() - h - 1), ins);
Chain **hch = p_data.first();
return octa::make_pair(Range(hch + h + 1, hch + bucket_count(),
found), ins);
}
float load_factor() const { return float(p_len) / p_size; }
@ -340,13 +333,13 @@ namespace detail {
}
Range each() {
return Range(p_data.first(), bucket_count());
return Range(p_data.first(), p_data.first() + bucket_count());
}
ConstRange each() const {
return ConstRange(p_data.first(), bucket_count());
return ConstRange(p_data.first(), p_data.first() + bucket_count());
}
ConstRange ceach() const {
return ConstRange(p_data.first(), bucket_count());
return ConstRange(p_data.first(), p_data.first() + bucket_count());
}
LocalRange each(octa::Size n) {