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/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkMacros_DEFINED
#define SkMacros_DEFINED
/*
* Usage: SK_MACRO_CONCAT(a, b) to construct the symbol ab
*
* SK_MACRO_CONCAT_IMPL_PRIV just exists to make this work. Do not use directly
*
*/
#define SK_MACRO_CONCAT(X, Y) SK_MACRO_CONCAT_IMPL_PRIV(X, Y)
#define SK_MACRO_CONCAT_IMPL_PRIV(X, Y) X ## Y
/*
* Usage: SK_MACRO_APPEND_LINE(foo) to make foo123, where 123 is the current
* line number. Easy way to construct
* unique names for local functions or
* variables.
*/
#define SK_MACRO_APPEND_LINE(name) SK_MACRO_CONCAT(name, __LINE__)
#define SK_MACRO_APPEND_COUNTER(name) SK_MACRO_CONCAT(name, __COUNTER__)
////////////////////////////////////////////////////////////////////////////////
// Can be used to bracket data types that must be dense, e.g. hash keys.
#if defined(__clang__) // This should work on GCC too, but GCC diagnostic pop didn't seem to work!
#define SK_BEGIN_REQUIRE_DENSE _Pragma("GCC diagnostic push") \
_Pragma("GCC diagnostic error \"-Wpadded\"")
#define SK_END_REQUIRE_DENSE _Pragma("GCC diagnostic pop")
#else
#define SK_BEGIN_REQUIRE_DENSE
#define SK_END_REQUIRE_DENSE
#endif
#define SK_INIT_TO_AVOID_WARNING = 0
////////////////////////////////////////////////////////////////////////////////
/**
* Defines overloaded bitwise operators to make it easier to use an enum as a
* bitfield.
*/
#define SK_MAKE_BITFIELD_OPS(X) \
inline X operator |(X a, X b) { \
return (X) (+a | +b); \
} \
inline X& operator |=(X& a, X b) { \
return (a = a | b); \
} \
inline X operator &(X a, X b) { \
return (X) (+a & +b); \
} \
inline X& operator &=(X& a, X b) { \
return (a = a & b); \
} \
template <typename T> \
inline X operator &(T a, X b) { \
return (X) (+a & +b); \
} \
template <typename T> \
inline X operator &(X a, T b) { \
return (X) (+a & +b); \
} \
#define SK_DECL_BITFIELD_OPS_FRIENDS(X) \
friend X operator |(X a, X b); \
friend X& operator |=(X& a, X b); \
\
friend X operator &(X a, X b); \
friend X& operator &=(X& a, X b); \
\
template <typename T> \
friend X operator &(T a, X b); \
\
template <typename T> \
friend X operator &(X a, T b); \
#endif // SkMacros_DEFINED
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