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1 /*
2  * Copyright 2016 Google Inc.
3  *
4  * Use of this source code is governed by a BSD-style license that can be
5  * found in the LICENSE file.
6  */
7 
8 #ifndef SKSL_INTLITERAL
9 #define SKSL_INTLITERAL
10 
11 #include "src/sksl/SkSLContext.h"
12 #include "src/sksl/ir/SkSLExpression.h"
13 
14 namespace SkSL {
15 
16 /**
17  * A literal integer.
18  */
19 struct IntLiteral : public Expression {
20     // FIXME: we will need to revisit this if/when we add full support for both signed and unsigned
21     // 64-bit integers, but for right now an int64_t will hold every value we care about
IntLiteralIntLiteral22     IntLiteral(const Context& context, int offset, int64_t value)
23     : INHERITED(offset, kIntLiteral_Kind, *context.fInt_Type)
24     , fValue(value) {}
25 
26     IntLiteral(int offset, int64_t value, const Type* type = nullptr)
27     : INHERITED(offset, kIntLiteral_Kind, *type)
28     , fValue(value) {}
29 
30 #ifdef SK_DEBUG
descriptionIntLiteral31     String description() const override {
32         return to_string(fValue);
33     }
34 #endif
35 
hasPropertyIntLiteral36     bool hasProperty(Property property) const override {
37         return false;
38     }
39 
isConstantIntLiteral40     bool isConstant() const override {
41         return true;
42     }
43 
compareConstantIntLiteral44     bool compareConstant(const Context& context, const Expression& other) const override {
45         IntLiteral& i = (IntLiteral&) other;
46         return fValue == i.fValue;
47     }
48 
coercionCostIntLiteral49     int coercionCost(const Type& target) const override {
50         if (target.isSigned() || target.isUnsigned() || target.isFloat() ||
51             target.kind() == Type::kEnum_Kind) {
52             return 0;
53         }
54         return INHERITED::coercionCost(target);
55     }
56 
getConstantIntIntLiteral57     int64_t getConstantInt() const override {
58         return fValue;
59     }
60 
cloneIntLiteral61     std::unique_ptr<Expression> clone() const override {
62         return std::unique_ptr<Expression>(new IntLiteral(fOffset, fValue, &fType));
63     }
64 
65     const int64_t fValue;
66 
67     typedef Expression INHERITED;
68 };
69 
70 } // namespace
71 
72 #endif
73