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Unified Diff: third_party/WebKit/Source/wtf/dtoa/bignum.h

Issue 1611343002: wtf reformat test Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: pydent Created 4 years, 11 months ago
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Index: third_party/WebKit/Source/wtf/dtoa/bignum.h
diff --git a/third_party/WebKit/Source/wtf/dtoa/bignum.h b/third_party/WebKit/Source/wtf/dtoa/bignum.h
index b290cb16a742ffe2108a3e00ff674c0866728efc..0aa0a4c30d7f7157f7d54c61fbd66b5dc1b5d3a0 100644
--- a/third_party/WebKit/Source/wtf/dtoa/bignum.h
+++ b/third_party/WebKit/Source/wtf/dtoa/bignum.h
@@ -34,112 +34,113 @@ namespace WTF {
namespace double_conversion {
- class Bignum {
- public:
- // 3584 = 128 * 28. We can represent 2^3584 > 10^1000 accurately.
- // This bignum can encode much bigger numbers, since it contains an
- // exponent.
- static const int kMaxSignificantBits = 3584;
-
- Bignum();
- void AssignUInt16(uint16_t value);
- void AssignUInt64(uint64_t value);
- void AssignBignum(const Bignum& other);
-
- void AssignDecimalString(Vector<const char> value);
- void AssignHexString(Vector<const char> value);
-
- void AssignPowerUInt16(uint16_t base, int exponent);
-
- void AddUInt16(uint16_t operand);
- void AddUInt64(uint64_t operand);
- void AddBignum(const Bignum& other);
- // Precondition: this >= other.
- void SubtractBignum(const Bignum& other);
-
- void Square();
- void ShiftLeft(int shift_amount);
- void MultiplyByUInt32(uint32_t factor);
- void MultiplyByUInt64(uint64_t factor);
- void MultiplyByPowerOfTen(int exponent);
- void Times10() { return MultiplyByUInt32(10); }
- // Pseudocode:
- // int result = this / other;
- // this = this % other;
- // In the worst case this function is in O(this/other).
- uint16_t DivideModuloIntBignum(const Bignum& other);
-
- bool ToHexString(char* buffer, int buffer_size) const;
-
- static int Compare(const Bignum& a, const Bignum& b);
- static bool Equal(const Bignum& a, const Bignum& b) {
- return Compare(a, b) == 0;
- }
- static bool LessEqual(const Bignum& a, const Bignum& b) {
- return Compare(a, b) <= 0;
- }
- static bool Less(const Bignum& a, const Bignum& b) {
- return Compare(a, b) < 0;
- }
- // Returns Compare(a + b, c);
- static int PlusCompare(const Bignum& a, const Bignum& b, const Bignum& c);
- // Returns a + b == c
- static bool PlusEqual(const Bignum& a, const Bignum& b, const Bignum& c) {
- return PlusCompare(a, b, c) == 0;
- }
- // Returns a + b <= c
- static bool PlusLessEqual(const Bignum& a, const Bignum& b, const Bignum& c) {
- return PlusCompare(a, b, c) <= 0;
- }
- // Returns a + b < c
- static bool PlusLess(const Bignum& a, const Bignum& b, const Bignum& c) {
- return PlusCompare(a, b, c) < 0;
- }
- private:
- typedef uint32_t Chunk;
- typedef uint64_t DoubleChunk;
-
- static const int kChunkSize = sizeof(Chunk) * 8;
- static const int kDoubleChunkSize = sizeof(DoubleChunk) * 8;
- // With bigit size of 28 we loose some bits, but a double still fits easily
- // into two chunks, and more importantly we can use the Comba multiplication.
- static const int kBigitSize = 28;
- static const Chunk kBigitMask = (1 << kBigitSize) - 1;
- // Every instance allocates kBigitLength chunks on the stack. Bignums cannot
- // grow. There are no checks if the stack-allocated space is sufficient.
- static const int kBigitCapacity = kMaxSignificantBits / kBigitSize;
-
- void EnsureCapacity(int size) {
- if (size > kBigitCapacity) {
- UNREACHABLE();
- }
- }
- void Align(const Bignum& other);
- void Clamp();
- bool IsClamped() const;
- void Zero();
- // Requires this to have enough capacity (no tests done).
- // Updates used_digits_ if necessary.
- // shift_amount must be < kBigitSize.
- void BigitsShiftLeft(int shift_amount);
- // BigitLength includes the "hidden" digits encoded in the exponent.
- int BigitLength() const { return used_digits_ + exponent_; }
- Chunk BigitAt(int index) const;
- void SubtractTimes(const Bignum& other, int factor);
-
- Chunk bigits_buffer_[kBigitCapacity];
- // A vector backed by bigits_buffer_. This way accesses to the array are
- // checked for out-of-bounds errors.
- Vector<Chunk> bigits_;
- int used_digits_;
- // The Bignum's value equals value(bigits_) * 2^(exponent_ * kBigitSize).
- int exponent_;
-
- DISALLOW_COPY_AND_ASSIGN(Bignum);
- };
+class Bignum {
+ public:
+ // 3584 = 128 * 28. We can represent 2^3584 > 10^1000 accurately.
+ // This bignum can encode much bigger numbers, since it contains an
+ // exponent.
+ static const int kMaxSignificantBits = 3584;
+
+ Bignum();
+ void AssignUInt16(uint16_t value);
+ void AssignUInt64(uint64_t value);
+ void AssignBignum(const Bignum& other);
+
+ void AssignDecimalString(Vector<const char> value);
+ void AssignHexString(Vector<const char> value);
+
+ void AssignPowerUInt16(uint16_t base, int exponent);
+
+ void AddUInt16(uint16_t operand);
+ void AddUInt64(uint64_t operand);
+ void AddBignum(const Bignum& other);
+ // Precondition: this >= other.
+ void SubtractBignum(const Bignum& other);
+
+ void Square();
+ void ShiftLeft(int shift_amount);
+ void MultiplyByUInt32(uint32_t factor);
+ void MultiplyByUInt64(uint64_t factor);
+ void MultiplyByPowerOfTen(int exponent);
+ void Times10() { return MultiplyByUInt32(10); }
+ // Pseudocode:
+ // int result = this / other;
+ // this = this % other;
+ // In the worst case this function is in O(this/other).
+ uint16_t DivideModuloIntBignum(const Bignum& other);
+
+ bool ToHexString(char* buffer, int buffer_size) const;
+
+ static int Compare(const Bignum& a, const Bignum& b);
+ static bool Equal(const Bignum& a, const Bignum& b) {
+ return Compare(a, b) == 0;
+ }
+ static bool LessEqual(const Bignum& a, const Bignum& b) {
+ return Compare(a, b) <= 0;
+ }
+ static bool Less(const Bignum& a, const Bignum& b) {
+ return Compare(a, b) < 0;
+ }
+ // Returns Compare(a + b, c);
+ static int PlusCompare(const Bignum& a, const Bignum& b, const Bignum& c);
+ // Returns a + b == c
+ static bool PlusEqual(const Bignum& a, const Bignum& b, const Bignum& c) {
+ return PlusCompare(a, b, c) == 0;
+ }
+ // Returns a + b <= c
+ static bool PlusLessEqual(const Bignum& a, const Bignum& b, const Bignum& c) {
+ return PlusCompare(a, b, c) <= 0;
+ }
+ // Returns a + b < c
+ static bool PlusLess(const Bignum& a, const Bignum& b, const Bignum& c) {
+ return PlusCompare(a, b, c) < 0;
+ }
+
+ private:
+ typedef uint32_t Chunk;
+ typedef uint64_t DoubleChunk;
+
+ static const int kChunkSize = sizeof(Chunk) * 8;
+ static const int kDoubleChunkSize = sizeof(DoubleChunk) * 8;
+ // With bigit size of 28 we loose some bits, but a double still fits easily
+ // into two chunks, and more importantly we can use the Comba multiplication.
+ static const int kBigitSize = 28;
+ static const Chunk kBigitMask = (1 << kBigitSize) - 1;
+ // Every instance allocates kBigitLength chunks on the stack. Bignums cannot
+ // grow. There are no checks if the stack-allocated space is sufficient.
+ static const int kBigitCapacity = kMaxSignificantBits / kBigitSize;
+
+ void EnsureCapacity(int size) {
+ if (size > kBigitCapacity) {
+ UNREACHABLE();
+ }
+ }
+ void Align(const Bignum& other);
+ void Clamp();
+ bool IsClamped() const;
+ void Zero();
+ // Requires this to have enough capacity (no tests done).
+ // Updates used_digits_ if necessary.
+ // shift_amount must be < kBigitSize.
+ void BigitsShiftLeft(int shift_amount);
+ // BigitLength includes the "hidden" digits encoded in the exponent.
+ int BigitLength() const { return used_digits_ + exponent_; }
+ Chunk BigitAt(int index) const;
+ void SubtractTimes(const Bignum& other, int factor);
+
+ Chunk bigits_buffer_[kBigitCapacity];
+ // A vector backed by bigits_buffer_. This way accesses to the array are
+ // checked for out-of-bounds errors.
+ Vector<Chunk> bigits_;
+ int used_digits_;
+ // The Bignum's value equals value(bigits_) * 2^(exponent_ * kBigitSize).
+ int exponent_;
+
+ DISALLOW_COPY_AND_ASSIGN(Bignum);
+};
} // namespace double_conversion
-} // namespace WTF
+} // namespace WTF
#endif // DOUBLE_CONVERSION_BIGNUM_H_
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