diff options
Diffstat (limited to 'toolkit/components/protobuf/src/google/protobuf/has_bits.h')
-rw-r--r-- | toolkit/components/protobuf/src/google/protobuf/has_bits.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/toolkit/components/protobuf/src/google/protobuf/has_bits.h b/toolkit/components/protobuf/src/google/protobuf/has_bits.h new file mode 100644 index 0000000000..f8a45879f1 --- /dev/null +++ b/toolkit/components/protobuf/src/google/protobuf/has_bits.h @@ -0,0 +1,117 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// Redistribution and use in source and binary forms, with or without +// 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. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#ifndef GOOGLE_PROTOBUF_HAS_BITS_H__ +#define GOOGLE_PROTOBUF_HAS_BITS_H__ + +#include <google/protobuf/stubs/common.h> +#include <google/protobuf/port.h> + +// Must be included last. +#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_t& operator[](int index) { + return has_bits_[index]; + } + + PROTOBUF_NDEBUG_INLINE const uint32_t& 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_t 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__ |