The Tor Browser: gfx/skia/trunk/include/core/SkFloatBits.h@129ffea94266 (annotated)

gfx/skia/trunk/include/core/SkFloatBits.h@129ffea94266 (annotated)

gfx/skia/trunk/include/core/SkFloatBits.h

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright 2008 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkFloatBits_DEFINED
 #define SkFloatBits_DEFINED
 #include "SkTypes.h"
 /** Convert a sign-bit int (i.e. float interpreted as int) into a 2s compliement
     int. This also converts -0 (0x80000000) to 0. Doing this to a float allows
     it to be compared using normal C operators (<, <=, etc.)
 */
 static inline int32_t SkSignBitTo2sCompliment(int32_t x) {
     if (x < 0) {
         x &= 0x7FFFFFFF;
         x = -x;
     }
     return x;
 }
 /** Convert a 2s compliment int to a sign-bit (i.e. int interpreted as float).
     This undoes the result of SkSignBitTo2sCompliment().
  */
 static inline int32_t Sk2sComplimentToSignBit(int32_t x) {
     int sign = x >> 31;
     // make x positive
     x = (x ^ sign) - sign;
     // set the sign bit as needed
     x |= sign << 31;
     return x;
 }
 /** Given the bit representation of a float, return its value cast to an int.
     If the value is out of range, or NaN, return return +/- SK_MaxS32
 */
 int32_t SkFloatBits_toIntCast(int32_t floatBits);
 /** Given the bit representation of a float, return its floor as an int.
     If the value is out of range, or NaN, return return +/- SK_MaxS32
  */
 SK_API int32_t SkFloatBits_toIntFloor(int32_t floatBits);
 /** Given the bit representation of a float, return it rounded to an int.
     If the value is out of range, or NaN, return return +/- SK_MaxS32
  */
 SK_API int32_t SkFloatBits_toIntRound(int32_t floatBits);
 /** Given the bit representation of a float, return its ceiling as an int.
     If the value is out of range, or NaN, return return +/- SK_MaxS32
  */
 SK_API int32_t SkFloatBits_toIntCeil(int32_t floatBits);
 union SkFloatIntUnion {
     float   fFloat;
     int32_t fSignBitInt;
 };
 // Helper to see a float as its bit pattern (w/o aliasing warnings)
 static inline int32_t SkFloat2Bits(float x) {
     SkFloatIntUnion data;
     data.fFloat = x;
     return data.fSignBitInt;
 }
 // Helper to see a bit pattern as a float (w/o aliasing warnings)
 static inline float SkBits2Float(int32_t floatAsBits) {
     SkFloatIntUnion data;
     data.fSignBitInt = floatAsBits;
     return data.fFloat;
 }
 /** Return the float as a 2s compliment int. Just to be used to compare floats
     to each other or against positive float-bit-constants (like 0). This does
     not return the int equivalent of the float, just something cheaper for
     compares-only.
  */
 static inline int32_t SkFloatAs2sCompliment(float x) {
     return SkSignBitTo2sCompliment(SkFloat2Bits(x));
 }
 /** Return the 2s compliment int as a float. This undos the result of
     SkFloatAs2sCompliment
  */
 static inline float Sk2sComplimentAsFloat(int32_t x) {
     return SkBits2Float(Sk2sComplimentToSignBit(x));
 }
 /** Return x cast to a float (i.e. (float)x)
 */
 float SkIntToFloatCast(int x);
 float SkIntToFloatCast_NoOverflowCheck(int x);
 /** Return the float cast to an int.
     If the value is out of range, or NaN, return +/- SK_MaxS32
 */
 static inline int32_t SkFloatToIntCast(float x) {
     return SkFloatBits_toIntCast(SkFloat2Bits(x));
 }
 /** Return the floor of the float as an int.
     If the value is out of range, or NaN, return +/- SK_MaxS32
 */
 static inline int32_t SkFloatToIntFloor(float x) {
     return SkFloatBits_toIntFloor(SkFloat2Bits(x));
 }
 /** Return the float rounded to an int.
     If the value is out of range, or NaN, return +/- SK_MaxS32
 */
 static inline int32_t SkFloatToIntRound(float x) {
     return SkFloatBits_toIntRound(SkFloat2Bits(x));
 }
 /** Return the ceiling of the float as an int.
     If the value is out of range, or NaN, return +/- SK_MaxS32
 */
 static inline int32_t SkFloatToIntCeil(float x) {
     return SkFloatBits_toIntCeil(SkFloat2Bits(x));
 }
 //  Scalar wrappers for float-bit routines
 #define SkScalarAs2sCompliment(x)    SkFloatAs2sCompliment(x)
 #define Sk2sComplimentAsScalar(x)    Sk2sComplimentAsFloat(x)
 #endif

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gfx/skia/trunk/include/core/SkFloatBits.h@129ffea94266 (annotated)

gfx/skia/trunk/include/core/SkFloatBits.h