wtf reformat test

third_party/WebKit/Source/wtf/dtoa/double.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 16 matching lines @@
 
 #ifndef DOUBLE_CONVERSION_DOUBLE_H_
 #define DOUBLE_CONVERSION_DOUBLE_H_
 
 #include "diy-fp.h"
 
 namespace WTF {
 
 namespace double_conversion {
 
-    // We assume that doubles and uint64_t have the same endianness.
-    static uint64_t double_to_uint64(double d) { return BitCast<uint64_t>(d); }
-    static double uint64_to_double(uint64_t d64) { return BitCast<double>(d64); }
-
-    // Helper functions for doubles.
-    class Double {
-    public:
-        static const uint64_t kSignMask = UINT64_2PART_C(0x80000000, 00000000);
-        static const uint64_t kExponentMask = UINT64_2PART_C(0x7FF00000, 00000000);
-        static const uint64_t kSignificandMask = UINT64_2PART_C(0x000FFFFF, FFFFFFFF);
-        static const uint64_t kHiddenBit = UINT64_2PART_C(0x00100000, 00000000);
-        static const int kPhysicalSignificandSize = 52;  // Excludes the hidden bit.
-        static const int kSignificandSize = 53;
-
-        Double() : d64_(0) {}
-        explicit Double(double d) : d64_(double_to_uint64(d)) {}
-        explicit Double(uint64_t d64) : d64_(d64) {}
-        explicit Double(DiyFp diy_fp)
-        : d64_(DiyFpToUint64(diy_fp)) {}
-
-        // The value encoded by this Double must be greater or equal to +0.0.
-        // It must not be special (infinity, or NaN).
-        DiyFp AsDiyFp() const {
-            ASSERT(Sign() > 0);
-            ASSERT(!IsSpecial());
-            return DiyFp(Significand(), Exponent());
-        }
-
-        // The value encoded by this Double must be strictly greater than 0.
-        DiyFp AsNormalizedDiyFp() const {
-            ASSERT(value() > 0.0);
-            uint64_t f = Significand();
-            int e = Exponent();
-
-            // The current double could be a denormal.
-            while ((f & kHiddenBit) == 0) {
-                f <<= 1;
-                e--;
-            }
-            // Do the final shifts in one go.
-            f <<= DiyFp::kSignificandSize - kSignificandSize;
-            e -= DiyFp::kSignificandSize - kSignificandSize;
-            return DiyFp(f, e);
-        }
-
-        // Returns the double's bit as uint64.
-        uint64_t AsUint64() const {
-            return d64_;
-        }
-
-        // Returns the next greater double. Returns +infinity on input +infinity.
-        double NextDouble() const {
-            if (d64_ == kInfinity) return Double(kInfinity).value();
-            if (Sign() < 0 && Significand() == 0) {
-                // -0.0
-                return 0.0;
-            }
-            if (Sign() < 0) {
-                return Double(d64_ - 1).value();
-            } else {
-                return Double(d64_ + 1).value();
-            }
-        }
-
-        int Exponent() const {
-            if (IsDenormal()) return kDenormalExponent;
-
-            uint64_t d64 = AsUint64();
-            int biased_e =
-            static_cast<int>((d64 & kExponentMask) >> kPhysicalSignificandSize);
-            return biased_e - kExponentBias;
-        }
-
-        uint64_t Significand() const {
-            uint64_t d64 = AsUint64();
-            uint64_t significand = d64 & kSignificandMask;
-            if (!IsDenormal()) {
-                return significand + kHiddenBit;
-            } else {
-                return significand;
-            }
-        }
-
-        // Returns true if the double is a denormal.
-        bool IsDenormal() const {
-            uint64_t d64 = AsUint64();
-            return (d64 & kExponentMask) == 0;
-        }
-
-        // We consider denormals not to be special.
-        // Hence only Infinity and NaN are special.
-        bool IsSpecial() const {
-            uint64_t d64 = AsUint64();
-            return (d64 & kExponentMask) == kExponentMask;
-        }
-
-        bool IsNan() const {
-            uint64_t d64 = AsUint64();
-            return ((d64 & kExponentMask) == kExponentMask) &&
-            ((d64 & kSignificandMask) != 0);
-        }
-
-        bool IsInfinite() const {
-            uint64_t d64 = AsUint64();
-            return ((d64 & kExponentMask) == kExponentMask) &&
-            ((d64 & kSignificandMask) == 0);
-        }
-
-        int Sign() const {
-            uint64_t d64 = AsUint64();
-            return (d64 & kSignMask) == 0? 1: -1;
-        }
-
-        // Precondition: the value encoded by this Double must be greater or equal
-        // than +0.0.
-        DiyFp UpperBoundary() const {
-            ASSERT(Sign() > 0);
-            return DiyFp(Significand() * 2 + 1, Exponent() - 1);
-        }
-
-        // Computes the two boundaries of this.
-        // The bigger boundary (m_plus) is normalized. The lower boundary has the same
-        // exponent as m_plus.
-        // Precondition: the value encoded by this Double must be greater than 0.
-        void NormalizedBoundaries(DiyFp* out_m_minus, DiyFp* out_m_plus) const {
-            ASSERT(value() > 0.0);
-            DiyFp v = this->AsDiyFp();
-            bool significand_is_zero = (v.f() == kHiddenBit);
-            DiyFp m_plus = DiyFp::Normalize(DiyFp((v.f() << 1) + 1, v.e() - 1));
-            DiyFp m_minus;
-            if (significand_is_zero && v.e() != kDenormalExponent) {
-                // The boundary is closer. Think of v = 1000e10 and v- = 9999e9.
-                // Then the boundary (== (v - v-)/2) is not just at a distance of 1e9 but
-                // at a distance of 1e8.
-                // The only exception is for the smallest normal: the largest denormal is
-                // at the same distance as its successor.
-                // Note: denormals have the same exponent as the smallest normals.
-                m_minus = DiyFp((v.f() << 2) - 1, v.e() - 2);
-            } else {
-                m_minus = DiyFp((v.f() << 1) - 1, v.e() - 1);
-            }
-            m_minus.set_f(m_minus.f() << (m_minus.e() - m_plus.e()));
-            m_minus.set_e(m_plus.e());
-            *out_m_plus = m_plus;
-            *out_m_minus = m_minus;
-        }
-
-        double value() const { return uint64_to_double(d64_); }
-
-        // Returns the significand size for a given order of magnitude.
-        // If v = f*2^e with 2^p-1 <= f <= 2^p then p+e is v's order of magnitude.
-        // This function returns the number of significant binary digits v will have
-        // once it's encoded into a double. In almost all cases this is equal to
-        // kSignificandSize. The only exceptions are denormals. They start with
-        // leading zeroes and their effective significand-size is hence smaller.
-        static int SignificandSizeForOrderOfMagnitude(int order) {
-            if (order >= (kDenormalExponent + kSignificandSize)) {
-                return kSignificandSize;
-            }
-            if (order <= kDenormalExponent) return 0;
-            return order - kDenormalExponent;
-        }
-
-        static double Infinity() {
-            return Double(kInfinity).value();
-        }
-
-        static double NaN() {
-            return Double(kNaN).value();
-        }
-
-    private:
-        static const int kExponentBias = 0x3FF + kPhysicalSignificandSize;
-        static const int kDenormalExponent = -kExponentBias + 1;
-        static const int kMaxExponent = 0x7FF - kExponentBias;
-        static const uint64_t kInfinity = UINT64_2PART_C(0x7FF00000, 00000000);
-        static const uint64_t kNaN = UINT64_2PART_C(0x7FF80000, 00000000);
-
-        const uint64_t d64_;
-
-        static uint64_t DiyFpToUint64(DiyFp diy_fp) {
-            uint64_t significand = diy_fp.f();
-            int exponent = diy_fp.e();
-            while (significand > kHiddenBit + kSignificandMask) {
-                significand >>= 1;
-                exponent++;
-            }
-            if (exponent >= kMaxExponent) {
-                return kInfinity;
-            }
-            if (exponent < kDenormalExponent) {
-                return 0;
-            }
-            while (exponent > kDenormalExponent && (significand & kHiddenBit) == 0) {
-                significand <<= 1;
-                exponent--;
-            }
-            uint64_t biased_exponent;
-            if (exponent == kDenormalExponent && (significand & kHiddenBit) == 0) {
-                biased_exponent = 0;
-            } else {
-                biased_exponent = static_cast<uint64_t>(exponent + kExponentBias);
-            }
-            return (significand & kSignificandMask) |
-            (biased_exponent << kPhysicalSignificandSize);
-        }
-    };
+// We assume that doubles and uint64_t have the same endianness.
+static uint64_t double_to_uint64(double d) {
+  return BitCast<uint64_t>(d);
+}
+static double uint64_to_double(uint64_t d64) {
+  return BitCast<double>(d64);
+}
+
+// Helper functions for doubles.
+class Double {
+ public:
+  static const uint64_t kSignMask = UINT64_2PART_C(0x80000000, 00000000);
+  static const uint64_t kExponentMask = UINT64_2PART_C(0x7FF00000, 00000000);
+  static const uint64_t kSignificandMask = UINT64_2PART_C(0x000FFFFF, FFFFFFFF);
+  static const uint64_t kHiddenBit = UINT64_2PART_C(0x00100000, 00000000);
+  static const int kPhysicalSignificandSize = 52;  // Excludes the hidden bit.
+  static const int kSignificandSize = 53;
+
+  Double() : d64_(0) {}
+  explicit Double(double d) : d64_(double_to_uint64(d)) {}
+  explicit Double(uint64_t d64) : d64_(d64) {}
+  explicit Double(DiyFp diy_fp) : d64_(DiyFpToUint64(diy_fp)) {}
+
+  // The value encoded by this Double must be greater or equal to +0.0.
+  // It must not be special (infinity, or NaN).
+  DiyFp AsDiyFp() const {
+    ASSERT(Sign() > 0);
+    ASSERT(!IsSpecial());
+    return DiyFp(Significand(), Exponent());
+  }
+
+  // The value encoded by this Double must be strictly greater than 0.
+  DiyFp AsNormalizedDiyFp() const {
+    ASSERT(value() > 0.0);
+    uint64_t f = Significand();
+    int e = Exponent();
+
+    // The current double could be a denormal.
+    while ((f & kHiddenBit) == 0) {
+      f <<= 1;
+      e--;
+    }
+    // Do the final shifts in one go.
+    f <<= DiyFp::kSignificandSize - kSignificandSize;
+    e -= DiyFp::kSignificandSize - kSignificandSize;
+    return DiyFp(f, e);
+  }
+
+  // Returns the double's bit as uint64.
+  uint64_t AsUint64() const { return d64_; }
+
+  // Returns the next greater double. Returns +infinity on input +infinity.
+  double NextDouble() const {
+    if (d64_ == kInfinity)
+      return Double(kInfinity).value();
+    if (Sign() < 0 && Significand() == 0) {
+      // -0.0
+      return 0.0;
+    }
+    if (Sign() < 0) {
+      return Double(d64_ - 1).value();
+    } else {
+      return Double(d64_ + 1).value();
+    }
+  }
+
+  int Exponent() const {
+    if (IsDenormal())
+      return kDenormalExponent;
+
+    uint64_t d64 = AsUint64();
+    int biased_e =
+        static_cast<int>((d64 & kExponentMask) >> kPhysicalSignificandSize);
+    return biased_e - kExponentBias;
+  }
+
+  uint64_t Significand() const {
+    uint64_t d64 = AsUint64();
+    uint64_t significand = d64 & kSignificandMask;
+    if (!IsDenormal()) {
+      return significand + kHiddenBit;
+    } else {
+      return significand;
+    }
+  }
+
+  // Returns true if the double is a denormal.
+  bool IsDenormal() const {
+    uint64_t d64 = AsUint64();
+    return (d64 & kExponentMask) == 0;
+  }
+
+  // We consider denormals not to be special.
+  // Hence only Infinity and NaN are special.
+  bool IsSpecial() const {
+    uint64_t d64 = AsUint64();
+    return (d64 & kExponentMask) == kExponentMask;
+  }
+
+  bool IsNan() const {
+    uint64_t d64 = AsUint64();
+    return ((d64 & kExponentMask) == kExponentMask) &&
+           ((d64 & kSignificandMask) != 0);
+  }
+
+  bool IsInfinite() const {
+    uint64_t d64 = AsUint64();
+    return ((d64 & kExponentMask) == kExponentMask) &&
+           ((d64 & kSignificandMask) == 0);
+  }
+
+  int Sign() const {
+    uint64_t d64 = AsUint64();
+    return (d64 & kSignMask) == 0 ? 1 : -1;
+  }
+
+  // Precondition: the value encoded by this Double must be greater or equal
+  // than +0.0.
+  DiyFp UpperBoundary() const {
+    ASSERT(Sign() > 0);
+    return DiyFp(Significand() * 2 + 1, Exponent() - 1);
+  }
+
+  // Computes the two boundaries of this.
+  // The bigger boundary (m_plus) is normalized. The lower boundary has the same
+  // exponent as m_plus.
+  // Precondition: the value encoded by this Double must be greater than 0.
+  void NormalizedBoundaries(DiyFp* out_m_minus, DiyFp* out_m_plus) const {
+    ASSERT(value() > 0.0);
+    DiyFp v = this->AsDiyFp();
+    bool significand_is_zero = (v.f() == kHiddenBit);
+    DiyFp m_plus = DiyFp::Normalize(DiyFp((v.f() << 1) + 1, v.e() - 1));
+    DiyFp m_minus;
+    if (significand_is_zero && v.e() != kDenormalExponent) {
+      // The boundary is closer. Think of v = 1000e10 and v- = 9999e9.
+      // Then the boundary (== (v - v-)/2) is not just at a distance of 1e9 but
+      // at a distance of 1e8.
+      // The only exception is for the smallest normal: the largest denormal is
+      // at the same distance as its successor.
+      // Note: denormals have the same exponent as the smallest normals.
+      m_minus = DiyFp((v.f() << 2) - 1, v.e() - 2);
+    } else {
+      m_minus = DiyFp((v.f() << 1) - 1, v.e() - 1);
+    }
+    m_minus.set_f(m_minus.f() << (m_minus.e() - m_plus.e()));
+    m_minus.set_e(m_plus.e());
+    *out_m_plus = m_plus;
+    *out_m_minus = m_minus;
+  }
+
+  double value() const { return uint64_to_double(d64_); }
+
+  // Returns the significand size for a given order of magnitude.
+  // If v = f*2^e with 2^p-1 <= f <= 2^p then p+e is v's order of magnitude.
+  // This function returns the number of significant binary digits v will have
+  // once it's encoded into a double. In almost all cases this is equal to
+  // kSignificandSize. The only exceptions are denormals. They start with
+  // leading zeroes and their effective significand-size is hence smaller.
+  static int SignificandSizeForOrderOfMagnitude(int order) {
+    if (order >= (kDenormalExponent + kSignificandSize)) {
+      return kSignificandSize;
+    }
+    if (order <= kDenormalExponent)
+      return 0;
+    return order - kDenormalExponent;
+  }
+
+  static double Infinity() { return Double(kInfinity).value(); }
+
+  static double NaN() { return Double(kNaN).value(); }
+
+ private:
+  static const int kExponentBias = 0x3FF + kPhysicalSignificandSize;
+  static const int kDenormalExponent = -kExponentBias + 1;
+  static const int kMaxExponent = 0x7FF - kExponentBias;
+  static const uint64_t kInfinity = UINT64_2PART_C(0x7FF00000, 00000000);
+  static const uint64_t kNaN = UINT64_2PART_C(0x7FF80000, 00000000);
+
+  const uint64_t d64_;
+
+  static uint64_t DiyFpToUint64(DiyFp diy_fp) {
+    uint64_t significand = diy_fp.f();
+    int exponent = diy_fp.e();
+    while (significand > kHiddenBit + kSignificandMask) {
+      significand >>= 1;
+      exponent++;
+    }
+    if (exponent >= kMaxExponent) {
+      return kInfinity;
+    }
+    if (exponent < kDenormalExponent) {
+      return 0;
+    }
+    while (exponent > kDenormalExponent && (significand & kHiddenBit) == 0) {
+      significand <<= 1;
+      exponent--;
+    }
+    uint64_t biased_exponent;
+    if (exponent == kDenormalExponent && (significand & kHiddenBit) == 0) {
+      biased_exponent = 0;
+    } else {
+      biased_exponent = static_cast<uint64_t>(exponent + kExponentBias);
+    }
+    return (significand & kSignificandMask) |
+           (biased_exponent << kPhysicalSignificandSize);
+  }
+};
 
 }  // namespace double_conversion
 
-} // namespace WTF
+}  // namespace WTF
 
 #endif  // DOUBLE_CONVERSION_DOUBLE_H_