diff options
Diffstat (limited to 'deps/v8/third_party/antlr4/runtime/Cpp/runtime/src/misc/Interval.cpp')
-rw-r--r-- | deps/v8/third_party/antlr4/runtime/Cpp/runtime/src/misc/Interval.cpp | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/deps/v8/third_party/antlr4/runtime/Cpp/runtime/src/misc/Interval.cpp b/deps/v8/third_party/antlr4/runtime/Cpp/runtime/src/misc/Interval.cpp new file mode 100644 index 0000000000..2eab06d624 --- /dev/null +++ b/deps/v8/third_party/antlr4/runtime/Cpp/runtime/src/misc/Interval.cpp @@ -0,0 +1,88 @@ +/* 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); +} |