1 //===--------------------- Range.cpp -----------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "lldb/Utility/Range.h" 11 12 using namespace lldb_utility; 13 14 Range::Range (const Range& rng) : 15 m_low(rng.m_low), 16 m_high(rng.m_high) 17 { 18 InitRange(); 19 } 20 21 Range::Range (Range::ValueType low, 22 Range::ValueType high) : 23 m_low(low), 24 m_high(high) 25 { 26 InitRange(); 27 } 28 29 void 30 Range::InitRange () 31 { 32 if (m_low == OPEN_END) 33 { 34 if (m_high == OPEN_END) 35 m_low = 0; 36 else 37 { 38 // make an empty range 39 m_low = 1; 40 m_high = 0; 41 } 42 } 43 } 44 45 Range& 46 Range::operator = (const Range& rhs) 47 { 48 if (&rhs != this) 49 { 50 this->m_low = rhs.m_low; 51 this->m_high = rhs.m_high; 52 } 53 return *this; 54 } 55 56 void 57 Range::Flip () 58 { 59 std::swap(m_high, m_low); 60 } 61 62 void 63 Range::Intersection (const Range& other) 64 { 65 m_low = std::max(m_low,other.m_low); 66 m_high = std::min(m_high,other.m_high); 67 } 68 69 void 70 Range::Union (const Range& other) 71 { 72 m_low = std::min(m_low,other.m_low); 73 m_high = std::max(m_high,other.m_high); 74 } 75 76 void 77 Range::Iterate (RangeCallback callback) 78 { 79 ValueType counter = m_low; 80 while (counter <= m_high) 81 { 82 bool should_continue = callback(counter); 83 if (!should_continue) 84 return; 85 counter++; 86 } 87 } 88 89 bool 90 Range::IsEmpty () 91 { 92 return (m_low > m_high); 93 } 94 95 Range::ValueType 96 Range::GetSize () 97 { 98 if (m_high == OPEN_END) 99 return OPEN_END; 100 if (m_high >= m_low) 101 return m_high - m_low + 1; 102 return 0; 103 } 104
