// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// See www.openfst.org for extensive documentation on this weighted
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// finite-state transducer library.
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#ifndef FST_LIB_COMPAT_H_
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#define FST_LIB_COMPAT_H_
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#include <climits>
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#include <cstdlib>
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#include <cstring>
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#include <iostream>
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#include <string>
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#include <vector>
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// Makes copy constructor and operator= private
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// Deprecated: now just use =delete.
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#define DISALLOW_COPY_AND_ASSIGN(type) \
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type(const type&); \
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void operator=(const type&)
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#if defined(__GNUC__) || defined(__clang__)
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#define OPENFST_DEPRECATED(message) __attribute__((deprecated(message)))
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#elif defined(_MSC_VER)
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#define OPENFST_DEPRECATED(message) __declspec(deprecated(message))
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#else
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#define OPENFST_DEPRECATED(message)
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#endif
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#include <fst/config.h>
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#include <fst/types.h>
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#include <fst/lock.h>
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#include <fst/flags.h>
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#include <fst/log.h>
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#include <fst/icu.h>
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using std::string;
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void FailedNewHandler();
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#ifdef _MSC_VER
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#include <intrin.h>
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const char* basename(const char* path);
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#define __builtin_popcount __popcnt
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#ifdef _M_X64
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// Using 64-bit MSVC intrinsics.
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#define __builtin_popcountll __popcnt64
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inline unsigned int __builtin_ctzll(std::uint64_t w) {
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unsigned long v;
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return _BitScanForward64(&v, std::uint32_t(w)) ? v : 0;
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}
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#else
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// Using 32-bit MSVC intrinsics.
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inline unsigned int __builtin_popcountll(std::uint64_t w) {
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return __popcnt(std::uint32_t(w)) + __popcnt(std::uint32_t(w >> 32));
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}
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inline unsigned int __builtin_ctzll(std::uint64_t w) {
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unsigned long v;
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return (_BitScanForward(&v, std::uint32_t(w)) ? v :
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_BitScanForward(&v, std::uint32_t(w >> 32)) ? v + 32 : 0);
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}
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#endif // _M_X64
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#endif // _MSC_VER
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namespace fst {
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// Downcasting.
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template<typename To, typename From>
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inline To down_cast(From* f) { return static_cast<To>(f); }
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// Bitcasting.
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template <class Dest, class Source>
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inline Dest bit_cast(const Source &source) {
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static_assert(sizeof(Dest) == sizeof(Source),
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"Bitcasting unsafe for specified types");
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Dest dest;
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memcpy(&dest, &source, sizeof(dest));
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return dest;
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}
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// Check sums
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class CheckSummer {
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public:
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CheckSummer() : count_(0) {
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check_sum_.resize(kCheckSumLength, '\0');
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}
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void Reset() {
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count_ = 0;
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for (int i = 0; i < kCheckSumLength; ++i) check_sum_[i] = '\0';
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}
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void Update(void const *data, int size) {
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const char *p = reinterpret_cast<const char *>(data);
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for (int i = 0; i < size; ++i) {
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check_sum_[(count_++) % kCheckSumLength] ^= p[i];
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}
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}
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void Update(string const &data) {
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for (int i = 0; i < data.size(); ++i) {
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check_sum_[(count_++) % kCheckSumLength] ^= data[i];
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}
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}
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string Digest() { return check_sum_; }
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private:
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static const int kCheckSumLength = 32;
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int count_;
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string check_sum_;
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CheckSummer(const CheckSummer &) = delete;
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CheckSummer &operator=(const CheckSummer &) = delete;
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};
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} // namespace fst
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#endif // FST_LIB_COMPAT_H_
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