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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkTFitsIn_DEFINED | 8 #ifndef SkTFitsIn_DEFINED |
9 #define SkTFitsIn_DEFINED | 9 #define SkTFitsIn_DEFINED |
10 | 10 |
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32 }; | 32 }; |
33 | 33 |
34 /** A low side predicate which tests if the source value < Min(D). | 34 /** A low side predicate which tests if the source value < Min(D). |
35 * Assumes that Min(S) <= Min(D). | 35 * Assumes that Min(S) <= Min(D). |
36 */ | 36 */ |
37 template <typename D, typename S> struct SkTOutOfRange_LT_MinD { | 37 template <typename D, typename S> struct SkTOutOfRange_LT_MinD { |
38 typedef SkTrue can_be_true; | 38 typedef SkTrue can_be_true; |
39 typedef S source_type; | 39 typedef S source_type; |
40 static bool apply(S s) { | 40 static bool apply(S s) { |
41 typedef typename SkTHasMoreDigits<S, D>::type precondition; | 41 typedef typename SkTHasMoreDigits<S, D>::type precondition; |
42 SK_COMPILE_ASSERT(precondition::value, SkTOutOfRange_LT_MinD__minS_gt_mi
nD); | 42 static_assert(precondition::value, "SkTOutOfRange_LT_MinD__minS_gt_minD"
); |
43 | 43 |
44 return s < static_cast<S>((std::numeric_limits<D>::min)()); | 44 return s < static_cast<S>((std::numeric_limits<D>::min)()); |
45 } | 45 } |
46 }; | 46 }; |
47 | 47 |
48 /** A low side predicate which tests if the source value is less than 0. */ | 48 /** A low side predicate which tests if the source value is less than 0. */ |
49 template <typename D, typename S> struct SkTOutOfRange_LT_Zero { | 49 template <typename D, typename S> struct SkTOutOfRange_LT_Zero { |
50 typedef SkTrue can_be_true; | 50 typedef SkTrue can_be_true; |
51 typedef S source_type; | 51 typedef S source_type; |
52 static bool apply(S s) { | 52 static bool apply(S s) { |
53 return s < static_cast<S>(0); | 53 return s < static_cast<S>(0); |
54 } | 54 } |
55 }; | 55 }; |
56 | 56 |
57 /** A high side predicate which tests if the source value > Max(D). | 57 /** A high side predicate which tests if the source value > Max(D). |
58 * Assumes that Max(S) >= Max(D). | 58 * Assumes that Max(S) >= Max(D). |
59 */ | 59 */ |
60 template <typename D, typename S> struct SkTOutOfRange_GT_MaxD { | 60 template <typename D, typename S> struct SkTOutOfRange_GT_MaxD { |
61 typedef SkTrue can_be_true; | 61 typedef SkTrue can_be_true; |
62 typedef S source_type; | 62 typedef S source_type; |
63 static bool apply(S s) { | 63 static bool apply(S s) { |
64 typedef typename SkTHasMoreDigits<S, D>::type precondition; | 64 typedef typename SkTHasMoreDigits<S, D>::type precondition; |
65 SK_COMPILE_ASSERT(precondition::value, SkTOutOfRange_GT_MaxD__maxS_lt_ma
xD); | 65 static_assert(precondition::value, "SkTOutOfRange_GT_MaxD__maxS_lt_maxD"
); |
66 | 66 |
67 return s > static_cast<S>((std::numeric_limits<D>::max)()); | 67 return s > static_cast<S>((std::numeric_limits<D>::max)()); |
68 } | 68 } |
69 }; | 69 }; |
70 | 70 |
71 /** Composes two SkTOutOfRange predicates. | 71 /** Composes two SkTOutOfRange predicates. |
72 * First checks OutOfRange_Low then, if in range, OutOfRange_High. | 72 * First checks OutOfRange_Low then, if in range, OutOfRange_High. |
73 */ | 73 */ |
74 template<class OutOfRange_Low, class OutOfRange_High> struct SkTOutOfRange_Eithe
r { | 74 template<class OutOfRange_Low, class OutOfRange_High> struct SkTOutOfRange_Eithe
r { |
75 typedef SkTrue can_be_true; | 75 typedef SkTrue can_be_true; |
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193 typedef typename SkTMux<S_is_signed, D_is_signed, S2S, S2U, U2S, U2U>::type
selector; | 193 typedef typename SkTMux<S_is_signed, D_is_signed, S2S, S2U, U2S, U2U>::type
selector; |
194 // This type is an SkTRangeChecker. | 194 // This type is an SkTRangeChecker. |
195 typedef typename selector::type type; | 195 typedef typename selector::type type; |
196 }; | 196 }; |
197 | 197 |
198 } // namespace Private | 198 } // namespace Private |
199 } // namespace sktfitsin | 199 } // namespace sktfitsin |
200 | 200 |
201 /** Returns true if the integer source value 's' will fit in the integer destina
tion type 'D'. */ | 201 /** Returns true if the integer source value 's' will fit in the integer destina
tion type 'D'. */ |
202 template <typename D, typename S> inline bool SkTFitsIn(S s) { | 202 template <typename D, typename S> inline bool SkTFitsIn(S s) { |
203 SK_COMPILE_ASSERT(std::numeric_limits<S>::is_integer, SkTFitsIn_source_must_
be_integer); | 203 static_assert(std::numeric_limits<S>::is_integer, "SkTFitsIn_source_must_be_
integer"); |
204 SK_COMPILE_ASSERT(std::numeric_limits<D>::is_integer, SkTFitsIn_destination_
must_be_integer); | 204 static_assert(std::numeric_limits<D>::is_integer, "SkTFitsIn_destination_mus
t_be_integer"); |
205 | 205 |
206 return !sktfitsin::Private::SkTFitsIn<D, S>::type::OutOfRange(s); | 206 return !sktfitsin::Private::SkTFitsIn<D, S>::type::OutOfRange(s); |
207 } | 207 } |
208 | 208 |
209 #endif | 209 #endif |
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