Restoring authorship annotation for Anton Samokhvalov <pg83@yandex.ru>. Commit 1 of 2.

1 files changed, 321 insertions, 321 deletions

diff --git a/contrib/libs/double-conversion/utils.h b/contrib/libs/double-conversion/utils.h
index 41c5b02d2c..c99e28f0f4 100644
--- a/contrib/libs/double-conversion/utils.h
+++ b/contrib/libs/double-conversion/utils.h
@@ -1,72 +1,72 @@
-// 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
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef DOUBLE_CONVERSION_UTILS_H_
-#define DOUBLE_CONVERSION_UTILS_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 
+//       with the distribution. 
+//     * Neither the name of Google Inc. nor the names of its 
+//       contributors may be used to endorse or promote products derived 
+//       from this software without specific prior written permission. 
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ 
+#ifndef DOUBLE_CONVERSION_UTILS_H_ 
+#define DOUBLE_CONVERSION_UTILS_H_ 
+ 
 #include <cstdlib>
 #include <cstring>
-
+ 
 #include <cassert>
-#ifndef ASSERT
-#define ASSERT(condition)         \
-    assert(condition);
-#endif
-#ifndef UNIMPLEMENTED
-#define UNIMPLEMENTED() (abort())
-#endif
-#ifndef DOUBLE_CONVERSION_NO_RETURN
-#ifdef _MSC_VER
-#define DOUBLE_CONVERSION_NO_RETURN __declspec(noreturn)
-#else
-#define DOUBLE_CONVERSION_NO_RETURN __attribute__((noreturn))
-#endif
-#endif
-#ifndef UNREACHABLE
-#ifdef _MSC_VER
-void DOUBLE_CONVERSION_NO_RETURN abort_noreturn();
-inline void abort_noreturn() { abort(); }
-#define UNREACHABLE()   (abort_noreturn())
-#else
-#define UNREACHABLE()   (abort())
-#endif
-#endif
-
-
-// Double operations detection based on target architecture.
-// Linux uses a 80bit wide floating point stack on x86. This induces double
-// rounding, which in turn leads to wrong results.
-// An easy way to test if the floating-point operations are correct is to
-// evaluate: 89255.0/1e22. If the floating-point stack is 64 bits wide then
-// the result is equal to 89255e-22.
-// The best way to test this, is to create a division-function and to compare
-// the output of the division with the expected result. (Inlining must be
-// disabled.)
-// On Linux,x86 89255e-22 != Div_double(89255.0/1e22)
+#ifndef ASSERT 
+#define ASSERT(condition)         \ 
+    assert(condition); 
+#endif 
+#ifndef UNIMPLEMENTED 
+#define UNIMPLEMENTED() (abort()) 
+#endif 
+#ifndef DOUBLE_CONVERSION_NO_RETURN 
+#ifdef _MSC_VER 
+#define DOUBLE_CONVERSION_NO_RETURN __declspec(noreturn) 
+#else 
+#define DOUBLE_CONVERSION_NO_RETURN __attribute__((noreturn)) 
+#endif 
+#endif 
+#ifndef UNREACHABLE 
+#ifdef _MSC_VER 
+void DOUBLE_CONVERSION_NO_RETURN abort_noreturn(); 
+inline void abort_noreturn() { abort(); } 
+#define UNREACHABLE()   (abort_noreturn()) 
+#else 
+#define UNREACHABLE()   (abort()) 
+#endif 
+#endif 
+ 
+ 
+// Double operations detection based on target architecture. 
+// Linux uses a 80bit wide floating point stack on x86. This induces double 
+// rounding, which in turn leads to wrong results. 
+// An easy way to test if the floating-point operations are correct is to 
+// evaluate: 89255.0/1e22. If the floating-point stack is 64 bits wide then 
+// the result is equal to 89255e-22. 
+// The best way to test this, is to create a division-function and to compare 
+// the output of the division with the expected result. (Inlining must be 
+// disabled.) 
+// On Linux,x86 89255e-22 != Div_double(89255.0/1e22) 
 //
 // For example:
 /*
@@ -83,276 +83,276 @@ int main(int argc, char** argv) {
 // Run as follows ./main || echo "correct"
 //
 // If it prints "correct" then the architecture should be here, in the "correct" section.
-#if defined(_M_X64) || defined(__x86_64__) || \
+#if defined(_M_X64) || defined(__x86_64__) || \ 
     defined(__ARMEL__) || defined(__avr32__) || defined(_M_ARM) || defined(_M_ARM64) || \
-    defined(__hppa__) || defined(__ia64__) || \
-    defined(__mips__) || \
-    defined(__powerpc__) || defined(__ppc__) || defined(__ppc64__) || \
-    defined(_POWER) || defined(_ARCH_PPC) || defined(_ARCH_PPC64) || \
-    defined(__sparc__) || defined(__sparc) || defined(__s390__) || \
-    defined(__SH4__) || defined(__alpha__) || \
-    defined(_MIPS_ARCH_MIPS32R2) || \
+    defined(__hppa__) || defined(__ia64__) || \ 
+    defined(__mips__) || \ 
+    defined(__powerpc__) || defined(__ppc__) || defined(__ppc64__) || \ 
+    defined(_POWER) || defined(_ARCH_PPC) || defined(_ARCH_PPC64) || \ 
+    defined(__sparc__) || defined(__sparc) || defined(__s390__) || \ 
+    defined(__SH4__) || defined(__alpha__) || \ 
+    defined(_MIPS_ARCH_MIPS32R2) || \ 
     defined(__AARCH64EL__) || defined(__aarch64__) || defined(__AARCH64EB__) || \
     defined(__riscv) || \
     defined(__or1k__)
-#define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
+#define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1 
 #elif defined(__mc68000__) || \
     defined(__pnacl__) || defined(__native_client__)
-#undef DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS
-#elif defined(_M_IX86) || defined(__i386__) || defined(__i386)
-#if defined(_WIN32)
-// Windows uses a 64bit wide floating point stack.
-#define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1
-#else
-#undef DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS
-#endif  // _WIN32
-#else
-#error Target architecture was not detected as supported by Double-Conversion.
-#endif
-
-#if defined(_WIN32) && !defined(__MINGW32__)
-
-typedef signed char int8_t;
-typedef unsigned char uint8_t;
-typedef short int16_t;  // NOLINT
-typedef unsigned short uint16_t;  // NOLINT
-typedef int int32_t;
-typedef unsigned int uint32_t;
-typedef __int64 int64_t;
-typedef unsigned __int64 uint64_t;
-// intptr_t and friends are defined in crtdefs.h through stdio.h.
-
-#else
-
-#include <stdint.h>
-
-#endif
-
-typedef uint16_t uc16;
-
-// The following macro works on both 32 and 64-bit platforms.
-// Usage: instead of writing 0x1234567890123456
-//      write UINT64_2PART_C(0x12345678,90123456);
-#define UINT64_2PART_C(a, b) (((static_cast<uint64_t>(a) << 32) + 0x##b##u))
-
-
-// The expression ARRAY_SIZE(a) is a compile-time constant of type
-// size_t which represents the number of elements of the given
-// array. You should only use ARRAY_SIZE on statically allocated
-// arrays.
-#ifndef ARRAY_SIZE
-#define ARRAY_SIZE(a)                                   \
-  ((sizeof(a) / sizeof(*(a))) /                         \
-  static_cast<size_t>(!(sizeof(a) % sizeof(*(a)))))
-#endif
-
-// A macro to disallow the evil copy constructor and operator= functions
-// This should be used in the private: declarations for a class
+#undef DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 
+#elif defined(_M_IX86) || defined(__i386__) || defined(__i386) 
+#if defined(_WIN32) 
+// Windows uses a 64bit wide floating point stack. 
+#define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1 
+#else 
+#undef DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 
+#endif  // _WIN32 
+#else 
+#error Target architecture was not detected as supported by Double-Conversion. 
+#endif 
+ 
+#if defined(_WIN32) && !defined(__MINGW32__) 
+ 
+typedef signed char int8_t; 
+typedef unsigned char uint8_t; 
+typedef short int16_t;  // NOLINT 
+typedef unsigned short uint16_t;  // NOLINT 
+typedef int int32_t; 
+typedef unsigned int uint32_t; 
+typedef __int64 int64_t; 
+typedef unsigned __int64 uint64_t; 
+// intptr_t and friends are defined in crtdefs.h through stdio.h. 
+ 
+#else 
+ 
+#include <stdint.h> 
+ 
+#endif 
+ 
+typedef uint16_t uc16; 
+ 
+// The following macro works on both 32 and 64-bit platforms. 
+// Usage: instead of writing 0x1234567890123456 
+//      write UINT64_2PART_C(0x12345678,90123456); 
+#define UINT64_2PART_C(a, b) (((static_cast<uint64_t>(a) << 32) + 0x##b##u)) 
+ 
+ 
+// The expression ARRAY_SIZE(a) is a compile-time constant of type 
+// size_t which represents the number of elements of the given 
+// array. You should only use ARRAY_SIZE on statically allocated 
+// arrays. 
+#ifndef ARRAY_SIZE 
+#define ARRAY_SIZE(a)                                   \ 
+  ((sizeof(a) / sizeof(*(a))) /                         \ 
+  static_cast<size_t>(!(sizeof(a) % sizeof(*(a))))) 
+#endif 
+ 
+// A macro to disallow the evil copy constructor and operator= functions 
+// This should be used in the private: declarations for a class 
 #ifndef DC_DISALLOW_COPY_AND_ASSIGN
 #define DC_DISALLOW_COPY_AND_ASSIGN(TypeName)      \
-  TypeName(const TypeName&);                    \
-  void operator=(const TypeName&)
-#endif
-
-// A macro to disallow all the implicit constructors, namely the
-// default constructor, copy constructor and operator= functions.
-//
-// This should be used in the private: declarations for a class
-// that wants to prevent anyone from instantiating it. This is
-// especially useful for classes containing only static methods.
+  TypeName(const TypeName&);                    \ 
+  void operator=(const TypeName&) 
+#endif 
+ 
+// A macro to disallow all the implicit constructors, namely the 
+// default constructor, copy constructor and operator= functions. 
+// 
+// This should be used in the private: declarations for a class 
+// that wants to prevent anyone from instantiating it. This is 
+// especially useful for classes containing only static methods. 
 #ifndef DC_DISALLOW_IMPLICIT_CONSTRUCTORS
 #define DC_DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
-  TypeName();                                    \
+  TypeName();                                    \ 
   DC_DISALLOW_COPY_AND_ASSIGN(TypeName)
-#endif
-
-namespace double_conversion {
-
-static const int kCharSize = sizeof(char);
-
-// Returns the maximum of the two parameters.
-template <typename T>
-static T Max(T a, T b) {
-  return a < b ? b : a;
-}
-
-
-// Returns the minimum of the two parameters.
-template <typename T>
-static T Min(T a, T b) {
-  return a < b ? a : b;
-}
-
-
-inline int StrLength(const char* string) {
-  size_t length = strlen(string);
-  ASSERT(length == static_cast<size_t>(static_cast<int>(length)));
-  return static_cast<int>(length);
-}
-
-// This is a simplified version of V8's Vector class.
-template <typename T>
-class Vector {
- public:
-  Vector() : start_(NULL), length_(0) {}
-  Vector(T* data, int len) : start_(data), length_(len) {
-    ASSERT(len == 0 || (len > 0 && data != NULL));
-  }
-
-  // Returns a vector using the same backing storage as this one,
-  // spanning from and including 'from', to but not including 'to'.
-  Vector<T> SubVector(int from, int to) {
-    ASSERT(to <= length_);
-    ASSERT(from < to);
-    ASSERT(0 <= from);
-    return Vector<T>(start() + from, to - from);
-  }
-
-  // Returns the length of the vector.
-  int length() const { return length_; }
-
-  // Returns whether or not the vector is empty.
-  bool is_empty() const { return length_ == 0; }
-
-  // Returns the pointer to the start of the data in the vector.
-  T* start() const { return start_; }
-
-  // Access individual vector elements - checks bounds in debug mode.
-  T& operator[](int index) const {
-    ASSERT(0 <= index && index < length_);
-    return start_[index];
-  }
-
-  T& first() { return start_[0]; }
-
-  T& last() { return start_[length_ - 1]; }
-
- private:
-  T* start_;
-  int length_;
-};
-
-
-// Helper class for building result strings in a character buffer. The
-// purpose of the class is to use safe operations that checks the
-// buffer bounds on all operations in debug mode.
-class StringBuilder {
- public:
-  StringBuilder(char* buffer, int buffer_size)
-      : buffer_(buffer, buffer_size), position_(0) { }
-
-  ~StringBuilder() { if (!is_finalized()) Finalize(); }
-
-  int size() const { return buffer_.length(); }
-
-  // Get the current position in the builder.
-  int position() const {
-    ASSERT(!is_finalized());
-    return position_;
-  }
-
-  // Reset the position.
-  void Reset() { position_ = 0; }
-
-  // Add a single character to the builder. It is not allowed to add
-  // 0-characters; use the Finalize() method to terminate the string
-  // instead.
-  void AddCharacter(char c) {
-    ASSERT(c != '\0');
-    ASSERT(!is_finalized() && position_ < buffer_.length());
-    buffer_[position_++] = c;
-  }
-
-  // Add an entire string to the builder. Uses strlen() internally to
-  // compute the length of the input string.
-  void AddString(const char* s) {
-    AddSubstring(s, StrLength(s));
-  }
-
-  // Add the first 'n' characters of the given string 's' to the
-  // builder. The input string must have enough characters.
-  void AddSubstring(const char* s, int n) {
-    ASSERT(!is_finalized() && position_ + n < buffer_.length());
-    ASSERT(static_cast<size_t>(n) <= strlen(s));
-    memmove(&buffer_[position_], s, n * kCharSize);
-    position_ += n;
-  }
-
-
-  // Add character padding to the builder. If count is non-positive,
-  // nothing is added to the builder.
-  void AddPadding(char c, int count) {
-    for (int i = 0; i < count; i++) {
-      AddCharacter(c);
-    }
-  }
-
-  // Finalize the string by 0-terminating it and returning the buffer.
-  char* Finalize() {
-    ASSERT(!is_finalized() && position_ < buffer_.length());
-    buffer_[position_] = '\0';
-    // Make sure nobody managed to add a 0-character to the
-    // buffer while building the string.
-    ASSERT(strlen(buffer_.start()) == static_cast<size_t>(position_));
-    position_ = -1;
-    ASSERT(is_finalized());
-    return buffer_.start();
-  }
-
- private:
-  Vector<char> buffer_;
-  int position_;
-
-  bool is_finalized() const { return position_ < 0; }
-
+#endif 
+ 
+namespace double_conversion { 
+ 
+static const int kCharSize = sizeof(char); 
+ 
+// Returns the maximum of the two parameters. 
+template <typename T> 
+static T Max(T a, T b) { 
+  return a < b ? b : a; 
+} 
+ 
+ 
+// Returns the minimum of the two parameters. 
+template <typename T> 
+static T Min(T a, T b) { 
+  return a < b ? a : b; 
+} 
+ 
+ 
+inline int StrLength(const char* string) { 
+  size_t length = strlen(string); 
+  ASSERT(length == static_cast<size_t>(static_cast<int>(length))); 
+  return static_cast<int>(length); 
+} 
+ 
+// This is a simplified version of V8's Vector class. 
+template <typename T> 
+class Vector { 
+ public: 
+  Vector() : start_(NULL), length_(0) {} 
+  Vector(T* data, int len) : start_(data), length_(len) { 
+    ASSERT(len == 0 || (len > 0 && data != NULL)); 
+  } 
+ 
+  // Returns a vector using the same backing storage as this one, 
+  // spanning from and including 'from', to but not including 'to'. 
+  Vector<T> SubVector(int from, int to) { 
+    ASSERT(to <= length_); 
+    ASSERT(from < to); 
+    ASSERT(0 <= from); 
+    return Vector<T>(start() + from, to - from); 
+  } 
+ 
+  // Returns the length of the vector. 
+  int length() const { return length_; } 
+ 
+  // Returns whether or not the vector is empty. 
+  bool is_empty() const { return length_ == 0; } 
+ 
+  // Returns the pointer to the start of the data in the vector. 
+  T* start() const { return start_; } 
+ 
+  // Access individual vector elements - checks bounds in debug mode. 
+  T& operator[](int index) const { 
+    ASSERT(0 <= index && index < length_); 
+    return start_[index]; 
+  } 
+ 
+  T& first() { return start_[0]; } 
+ 
+  T& last() { return start_[length_ - 1]; } 
+ 
+ private: 
+  T* start_; 
+  int length_; 
+}; 
+ 
+ 
+// Helper class for building result strings in a character buffer. The 
+// purpose of the class is to use safe operations that checks the 
+// buffer bounds on all operations in debug mode. 
+class StringBuilder { 
+ public: 
+  StringBuilder(char* buffer, int buffer_size) 
+      : buffer_(buffer, buffer_size), position_(0) { } 
+ 
+  ~StringBuilder() { if (!is_finalized()) Finalize(); } 
+ 
+  int size() const { return buffer_.length(); } 
+ 
+  // Get the current position in the builder. 
+  int position() const { 
+    ASSERT(!is_finalized()); 
+    return position_; 
+  } 
+ 
+  // Reset the position. 
+  void Reset() { position_ = 0; } 
+ 
+  // Add a single character to the builder. It is not allowed to add 
+  // 0-characters; use the Finalize() method to terminate the string 
+  // instead. 
+  void AddCharacter(char c) { 
+    ASSERT(c != '\0'); 
+    ASSERT(!is_finalized() && position_ < buffer_.length()); 
+    buffer_[position_++] = c; 
+  } 
+ 
+  // Add an entire string to the builder. Uses strlen() internally to 
+  // compute the length of the input string. 
+  void AddString(const char* s) { 
+    AddSubstring(s, StrLength(s)); 
+  } 
+ 
+  // Add the first 'n' characters of the given string 's' to the 
+  // builder. The input string must have enough characters. 
+  void AddSubstring(const char* s, int n) { 
+    ASSERT(!is_finalized() && position_ + n < buffer_.length()); 
+    ASSERT(static_cast<size_t>(n) <= strlen(s)); 
+    memmove(&buffer_[position_], s, n * kCharSize); 
+    position_ += n; 
+  } 
+ 
+ 
+  // Add character padding to the builder. If count is non-positive, 
+  // nothing is added to the builder. 
+  void AddPadding(char c, int count) { 
+    for (int i = 0; i < count; i++) { 
+      AddCharacter(c); 
+    } 
+  } 
+ 
+  // Finalize the string by 0-terminating it and returning the buffer. 
+  char* Finalize() { 
+    ASSERT(!is_finalized() && position_ < buffer_.length()); 
+    buffer_[position_] = '\0'; 
+    // Make sure nobody managed to add a 0-character to the 
+    // buffer while building the string. 
+    ASSERT(strlen(buffer_.start()) == static_cast<size_t>(position_)); 
+    position_ = -1; 
+    ASSERT(is_finalized()); 
+    return buffer_.start(); 
+  } 
+ 
+ private: 
+  Vector<char> buffer_; 
+  int position_; 
+ 
+  bool is_finalized() const { return position_ < 0; } 
+ 
   DC_DISALLOW_IMPLICIT_CONSTRUCTORS(StringBuilder);
-};
-
-// The type-based aliasing rule allows the compiler to assume that pointers of
-// different types (for some definition of different) never alias each other.
-// Thus the following code does not work:
-//
-// float f = foo();
-// int fbits = *(int*)(&f);
-//
-// The compiler 'knows' that the int pointer can't refer to f since the types
-// don't match, so the compiler may cache f in a register, leaving random data
-// in fbits.  Using C++ style casts makes no difference, however a pointer to
-// char data is assumed to alias any other pointer.  This is the 'memcpy
-// exception'.
-//
-// Bit_cast uses the memcpy exception to move the bits from a variable of one
-// type of a variable of another type.  Of course the end result is likely to
-// be implementation dependent.  Most compilers (gcc-4.2 and MSVC 2005)
-// will completely optimize BitCast away.
-//
-// There is an additional use for BitCast.
-// Recent gccs will warn when they see casts that may result in breakage due to
-// the type-based aliasing rule.  If you have checked that there is no breakage
-// you can use BitCast to cast one pointer type to another.  This confuses gcc
-// enough that it can no longer see that you have cast one pointer type to
-// another thus avoiding the warning.
-template <class Dest, class Source>
-inline Dest BitCast(const Source& source) {
-  // Compile time assertion: sizeof(Dest) == sizeof(Source)
-  // A compile error here means your Dest and Source have different sizes.
+}; 
+ 
+// The type-based aliasing rule allows the compiler to assume that pointers of 
+// different types (for some definition of different) never alias each other. 
+// Thus the following code does not work: 
+// 
+// float f = foo(); 
+// int fbits = *(int*)(&f); 
+// 
+// The compiler 'knows' that the int pointer can't refer to f since the types 
+// don't match, so the compiler may cache f in a register, leaving random data 
+// in fbits.  Using C++ style casts makes no difference, however a pointer to 
+// char data is assumed to alias any other pointer.  This is the 'memcpy 
+// exception'. 
+// 
+// Bit_cast uses the memcpy exception to move the bits from a variable of one 
+// type of a variable of another type.  Of course the end result is likely to 
+// be implementation dependent.  Most compilers (gcc-4.2 and MSVC 2005) 
+// will completely optimize BitCast away. 
+// 
+// There is an additional use for BitCast. 
+// Recent gccs will warn when they see casts that may result in breakage due to 
+// the type-based aliasing rule.  If you have checked that there is no breakage 
+// you can use BitCast to cast one pointer type to another.  This confuses gcc 
+// enough that it can no longer see that you have cast one pointer type to 
+// another thus avoiding the warning. 
+template <class Dest, class Source> 
+inline Dest BitCast(const Source& source) { 
+  // Compile time assertion: sizeof(Dest) == sizeof(Source) 
+  // A compile error here means your Dest and Source have different sizes. 
 #if __cplusplus >= 201103L
   static_assert(sizeof(Dest) == sizeof(Source),
                 "source and destination size mismatch");
 #else
   typedef char VerifySizesAreEqual[sizeof(Dest) == sizeof(Source) ? 1 : -1];
 #endif
-
-  Dest dest;
-  memmove(&dest, &source, sizeof(dest));
-  return dest;
-}
-
-template <class Dest, class Source>
-inline Dest BitCast(Source* source) {
-  return BitCast<Dest>(reinterpret_cast<uintptr_t>(source));
-}
-
-}  // namespace double_conversion
-
-#endif  // DOUBLE_CONVERSION_UTILS_H_
+ 
+  Dest dest; 
+  memmove(&dest, &source, sizeof(dest)); 
+  return dest; 
+} 
+ 
+template <class Dest, class Source> 
+inline Dest BitCast(Source* source) { 
+  return BitCast<Dest>(reinterpret_cast<uintptr_t>(source)); 
+} 
+ 
+}  // namespace double_conversion 
+ 
+#endif  // DOUBLE_CONVERSION_UTILS_H_