gfx/skia/trunk/include/device/xps/SkConstexprMath.h@129ffea94266 (annotated)
gfx/skia/trunk/include/device/xps/SkConstexprMath.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.
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright 2011 Google Inc. |
| michael@0 | 3 | * |
| michael@0 | 4 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 5 | * found in the LICENSE file. |
| michael@0 | 6 | */ |
| michael@0 | 7 | |
| michael@0 | 8 | #ifndef SkConstexprMath_DEFINED |
| michael@0 | 9 | #define SkConstexprMath_DEFINED |
| michael@0 | 10 | |
| michael@0 | 11 | #include "SkTypes.h" |
| michael@0 | 12 | #include <limits.h> |
| michael@0 | 13 | |
| michael@0 | 14 | template <uintmax_t N, uintmax_t B> |
| michael@0 | 15 | struct SK_LOG { |
| michael@0 | 16 | //! Compile-time constant ceiling(logB(N)). |
| michael@0 | 17 | static const uintmax_t value = 1 + SK_LOG<N/B, B>::value; |
| michael@0 | 18 | }; |
| michael@0 | 19 | template <uintmax_t B> |
| michael@0 | 20 | struct SK_LOG<1, B> { |
| michael@0 | 21 | static const uintmax_t value = 0; |
| michael@0 | 22 | }; |
| michael@0 | 23 | template <uintmax_t B> |
| michael@0 | 24 | struct SK_LOG<0, B> { |
| michael@0 | 25 | static const uintmax_t value = 0; |
| michael@0 | 26 | }; |
| michael@0 | 27 | |
| michael@0 | 28 | template<uintmax_t N> |
| michael@0 | 29 | struct SK_2N1 { |
| michael@0 | 30 | //! Compile-time constant (2^N)-1. |
| michael@0 | 31 | static const uintmax_t value = (SK_2N1<N-1>::value << 1) + 1; |
| michael@0 | 32 | }; |
| michael@0 | 33 | template<> |
| michael@0 | 34 | struct SK_2N1<1> { |
| michael@0 | 35 | static const uintmax_t value = 1; |
| michael@0 | 36 | }; |
| michael@0 | 37 | |
| michael@0 | 38 | /** Compile-time constant number of base n digits in type t |
| michael@0 | 39 | if the bits of type t are considered as unsigned base two. |
| michael@0 | 40 | */ |
| michael@0 | 41 | #define SK_BASE_N_DIGITS_IN(n, t) (\ |
| michael@0 | 42 | SK_LOG<SK_2N1<(sizeof(t) * CHAR_BIT)>::value, n>::value\ |
| michael@0 | 43 | ) |
| michael@0 | 44 | /** Compile-time constant number of base 10 digits in type t |
| michael@0 | 45 | if the bits of type t are considered as unsigned base two. |
| michael@0 | 46 | */ |
| michael@0 | 47 | #define SK_DIGITS_IN(t) SK_BASE_N_DIGITS_IN(10, (t)) |
| michael@0 | 48 | |
| michael@0 | 49 | // Compile-time constant maximum value of two unsigned values. |
| michael@0 | 50 | template <uintmax_t a, uintmax_t b> struct SkTUMax { |
| michael@0 | 51 | static const uintmax_t value = (b < a) ? a : b; |
| michael@0 | 52 | }; |
| michael@0 | 53 | |
| michael@0 | 54 | #endif |
