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/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
* Use of this file is governed by the BSD 3-clause license that
* can be found in the LICENSE.txt file in the project root.
*/
#include "misc/Interval.h"
using namespace antlr4::misc;
size_t antlr4::misc::numericToSymbol(ssize_t v) {
return static_cast<size_t>(v);
}
ssize_t antlr4::misc::symbolToNumeric(size_t v) {
return static_cast<ssize_t>(v);
}
Interval const Interval::INVALID;
Interval::Interval() : Interval(static_cast<ssize_t>(-1), -2) { // Need an explicit cast here for VS.
}
Interval::Interval(size_t a_, size_t b_) : Interval(symbolToNumeric(a_), symbolToNumeric(b_)) {
}
Interval::Interval(ssize_t a_, ssize_t b_) : a(a_), b(b_) {
}
size_t Interval::length() const {
if (b < a) {
return 0;
}
return size_t(b - a + 1);
}
bool Interval::operator == (const Interval &other) const {
return a == other.a && b == other.b;
}
size_t Interval::hashCode() const {
size_t hash = 23;
hash = hash * 31 + static_cast<size_t>(a);
hash = hash * 31 + static_cast<size_t>(b);
return hash;
}
bool Interval::startsBeforeDisjoint(const Interval &other) const {
return a < other.a && b < other.a;
}
bool Interval::startsBeforeNonDisjoint(const Interval &other) const {
return a <= other.a && b >= other.a;
}
bool Interval::startsAfter(const Interval &other) const {
return a > other.a;
}
bool Interval::startsAfterDisjoint(const Interval &other) const {
return a > other.b;
}
bool Interval::startsAfterNonDisjoint(const Interval &other) const {
return a > other.a && a <= other.b; // b >= other.b implied
}
bool Interval::disjoint(const Interval &other) const {
return startsBeforeDisjoint(other) || startsAfterDisjoint(other);
}
bool Interval::adjacent(const Interval &other) const {
return a == other.b + 1 || b == other.a - 1;
}
bool Interval::properlyContains(const Interval &other) const {
return other.a >= a && other.b <= b;
}
Interval Interval::Union(const Interval &other) const {
return Interval(std::min(a, other.a), std::max(b, other.b));
}
Interval Interval::intersection(const Interval &other) const {
return Interval(std::max(a, other.a), std::min(b, other.b));
}
std::string Interval::toString() const {
return std::to_string(a) + ".." + std::to_string(b);
}
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