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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
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//
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#ifndef GOOGLE_PROTOBUF_HAS_BITS_H__
#define GOOGLE_PROTOBUF_HAS_BITS_H__
#include <google/protobuf/stubs/common.h>
#include <google/protobuf/port.h>
#include <google/protobuf/port_def.inc>
#ifdef SWIG
#error "You cannot SWIG proto headers"
#endif
namespace google {
namespace protobuf {
namespace internal {
template <size_t doublewords>
class HasBits {
public:
PROTOBUF_NDEBUG_INLINE constexpr HasBits() : has_bits_{} {}
PROTOBUF_NDEBUG_INLINE void Clear() {
memset(has_bits_, 0, sizeof(has_bits_));
}
PROTOBUF_NDEBUG_INLINE uint32& operator[](int index) {
return has_bits_[index];
}
PROTOBUF_NDEBUG_INLINE const uint32& operator[](int index) const {
return has_bits_[index];
}
bool operator==(const HasBits<doublewords>& rhs) const {
return memcmp(has_bits_, rhs.has_bits_, sizeof(has_bits_)) == 0;
}
bool operator!=(const HasBits<doublewords>& rhs) const {
return !(*this == rhs);
}
void Or(const HasBits<doublewords>& rhs) {
for (size_t i = 0; i < doublewords; i++) has_bits_[i] |= rhs[i];
}
bool empty() const;
private:
uint32 has_bits_[doublewords];
};
template <>
inline bool HasBits<1>::empty() const {
return !has_bits_[0];
}
template <>
inline bool HasBits<2>::empty() const {
return !(has_bits_[0] | has_bits_[1]);
}
template <>
inline bool HasBits<3>::empty() const {
return !(has_bits_[0] | has_bits_[1] | has_bits_[2]);
}
template <>
inline bool HasBits<4>::empty() const {
return !(has_bits_[0] | has_bits_[1] | has_bits_[2] | has_bits_[3]);
}
template <size_t doublewords>
inline bool HasBits<doublewords>::empty() const {
for (size_t i = 0; i < doublewords; ++i) {
if (has_bits_[i]) return false;
}
return true;
}
} // namespace internal
} // namespace protobuf
} // namespace google
#include <google/protobuf/port_undef.inc>
#endif // GOOGLE_PROTOBUF_HAS_BITS_H__
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