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Posted to commits@marmotta.apache.org by ja...@apache.org on 2018/06/18 18:35:49 UTC
[30/62] [abbrv] [partial] marmotta git commit: * Replace gtest with
upstream version,
including LICENSE header. * Include absl library for faster and safer string
operations. * Update license headers where needed. * Removed custom code
replaced by absl.
http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/str_split_internal.h
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diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/str_split_internal.h b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/str_split_internal.h
new file mode 100644
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--- /dev/null
+++ b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/str_split_internal.h
@@ -0,0 +1,435 @@
+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// This file declares INTERNAL parts of the Split API that are inline/templated
+// or otherwise need to be available at compile time. The main abstractions
+// defined in here are
+//
+// - ConvertibleToStringView
+// - SplitIterator<>
+// - Splitter<>
+//
+// DO NOT INCLUDE THIS FILE DIRECTLY. Use this file by including
+// absl/strings/str_split.h.
+//
+// IWYU pragma: private, include "absl/strings/str_split.h"
+
+#ifndef ABSL_STRINGS_INTERNAL_STR_SPLIT_INTERNAL_H_
+#define ABSL_STRINGS_INTERNAL_STR_SPLIT_INTERNAL_H_
+
+#include <array>
+#include <initializer_list>
+#include <iterator>
+#include <map>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+#include "absl/base/macros.h"
+#include "absl/base/port.h"
+#include "absl/meta/type_traits.h"
+#include "absl/strings/string_view.h"
+
+#ifdef _GLIBCXX_DEBUG
+#include "absl/strings/internal/stl_type_traits.h"
+#endif // _GLIBCXX_DEBUG
+
+namespace absl {
+namespace strings_internal {
+
+// This class is implicitly constructible from everything that absl::string_view
+// is implicitly constructible from. If it's constructed from a temporary
+// std::string, the data is moved into a data member so its lifetime matches that of
+// the ConvertibleToStringView instance.
+class ConvertibleToStringView {
+ public:
+ ConvertibleToStringView(const char* s) // NOLINT(runtime/explicit)
+ : value_(s) {}
+ ConvertibleToStringView(char* s) : value_(s) {} // NOLINT(runtime/explicit)
+ ConvertibleToStringView(absl::string_view s) // NOLINT(runtime/explicit)
+ : value_(s) {}
+ ConvertibleToStringView(const std::string& s) // NOLINT(runtime/explicit)
+ : value_(s) {}
+
+ // Matches rvalue strings and moves their data to a member.
+ConvertibleToStringView(std::string&& s) // NOLINT(runtime/explicit)
+ : copy_(std::move(s)), value_(copy_) {}
+
+ ConvertibleToStringView(const ConvertibleToStringView& other)
+ : copy_(other.copy_),
+ value_(other.IsSelfReferential() ? copy_ : other.value_) {}
+
+ ConvertibleToStringView(ConvertibleToStringView&& other) {
+ StealMembers(std::move(other));
+ }
+
+ ConvertibleToStringView& operator=(ConvertibleToStringView other) {
+ StealMembers(std::move(other));
+ return *this;
+ }
+
+ absl::string_view value() const { return value_; }
+
+ private:
+ // Returns true if ctsp's value refers to its internal copy_ member.
+ bool IsSelfReferential() const { return value_.data() == copy_.data(); }
+
+ void StealMembers(ConvertibleToStringView&& other) {
+ if (other.IsSelfReferential()) {
+ copy_ = std::move(other.copy_);
+ value_ = copy_;
+ other.value_ = other.copy_;
+ } else {
+ value_ = other.value_;
+ }
+ }
+
+ // Holds the data moved from temporary std::string arguments. Declared first so
+ // that 'value' can refer to 'copy_'.
+ std::string copy_;
+ absl::string_view value_;
+};
+
+// An iterator that enumerates the parts of a std::string from a Splitter. The text
+// to be split, the Delimiter, and the Predicate are all taken from the given
+// Splitter object. Iterators may only be compared if they refer to the same
+// Splitter instance.
+//
+// This class is NOT part of the public splitting API.
+template <typename Splitter>
+class SplitIterator {
+ public:
+ using iterator_category = std::input_iterator_tag;
+ using value_type = absl::string_view;
+ using difference_type = ptrdiff_t;
+ using pointer = const value_type*;
+ using reference = const value_type&;
+
+ enum State { kInitState, kLastState, kEndState };
+ SplitIterator(State state, const Splitter* splitter)
+ : pos_(0),
+ state_(state),
+ splitter_(splitter),
+ delimiter_(splitter->delimiter()),
+ predicate_(splitter->predicate()) {
+ // Hack to maintain backward compatibility. This one block makes it so an
+ // empty absl::string_view whose .data() happens to be nullptr behaves
+ // *differently* from an otherwise empty absl::string_view whose .data() is
+ // not nullptr. This is an undesirable difference in general, but this
+ // behavior is maintained to avoid breaking existing code that happens to
+ // depend on this old behavior/bug. Perhaps it will be fixed one day. The
+ // difference in behavior is as follows:
+ // Split(absl::string_view(""), '-'); // {""}
+ // Split(absl::string_view(), '-'); // {}
+ if (splitter_->text().data() == nullptr) {
+ state_ = kEndState;
+ pos_ = splitter_->text().size();
+ return;
+ }
+
+ if (state_ == kEndState) {
+ pos_ = splitter_->text().size();
+ } else {
+ ++(*this);
+ }
+ }
+
+ bool at_end() const { return state_ == kEndState; }
+
+ reference operator*() const { return curr_; }
+ pointer operator->() const { return &curr_; }
+
+ SplitIterator& operator++() {
+ do {
+ if (state_ == kLastState) {
+ state_ = kEndState;
+ return *this;
+ }
+ const absl::string_view text = splitter_->text();
+ const absl::string_view d = delimiter_.Find(text, pos_);
+ if (d.data() == text.end()) state_ = kLastState;
+ curr_ = text.substr(pos_, d.data() - (text.data() + pos_));
+ pos_ += curr_.size() + d.size();
+ } while (!predicate_(curr_));
+ return *this;
+ }
+
+ SplitIterator operator++(int) {
+ SplitIterator old(*this);
+ ++(*this);
+ return old;
+ }
+
+ friend bool operator==(const SplitIterator& a, const SplitIterator& b) {
+ return a.state_ == b.state_ && a.pos_ == b.pos_;
+ }
+
+ friend bool operator!=(const SplitIterator& a, const SplitIterator& b) {
+ return !(a == b);
+ }
+
+ private:
+ size_t pos_;
+ State state_;
+ absl::string_view curr_;
+ const Splitter* splitter_;
+ typename Splitter::DelimiterType delimiter_;
+ typename Splitter::PredicateType predicate_;
+};
+
+// HasMappedType<T>::value is true iff there exists a type T::mapped_type.
+template <typename T, typename = void>
+struct HasMappedType : std::false_type {};
+template <typename T>
+struct HasMappedType<T, absl::void_t<typename T::mapped_type>>
+ : std::true_type {};
+
+// HasValueType<T>::value is true iff there exists a type T::value_type.
+template <typename T, typename = void>
+struct HasValueType : std::false_type {};
+template <typename T>
+struct HasValueType<T, absl::void_t<typename T::value_type>> : std::true_type {
+};
+
+// HasConstIterator<T>::value is true iff there exists a type T::const_iterator.
+template <typename T, typename = void>
+struct HasConstIterator : std::false_type {};
+template <typename T>
+struct HasConstIterator<T, absl::void_t<typename T::const_iterator>>
+ : std::true_type {};
+
+// IsInitializerList<T>::value is true iff T is an std::initializer_list. More
+// details below in Splitter<> where this is used.
+std::false_type IsInitializerListDispatch(...); // default: No
+template <typename T>
+std::true_type IsInitializerListDispatch(std::initializer_list<T>*);
+template <typename T>
+struct IsInitializerList
+ : decltype(IsInitializerListDispatch(static_cast<T*>(nullptr))) {};
+
+// A SplitterIsConvertibleTo<C>::type alias exists iff the specified condition
+// is true for type 'C'.
+//
+// Restricts conversion to container-like types (by testing for the presence of
+// a const_iterator member type) and also to disable conversion to an
+// std::initializer_list (which also has a const_iterator). Otherwise, code
+// compiled in C++11 will get an error due to ambiguous conversion paths (in
+// C++11 std::vector<T>::operator= is overloaded to take either a std::vector<T>
+// or an std::initializer_list<T>).
+template <typename C>
+struct SplitterIsConvertibleTo
+ : std::enable_if<
+#ifdef _GLIBCXX_DEBUG
+ !IsStrictlyBaseOfAndConvertibleToSTLContainer<C>::value &&
+#endif // _GLIBCXX_DEBUG
+ !IsInitializerList<C>::value && HasValueType<C>::value &&
+ HasConstIterator<C>::value> {
+};
+
+// This class implements the range that is returned by absl::StrSplit(). This
+// class has templated conversion operators that allow it to be implicitly
+// converted to a variety of types that the caller may have specified on the
+// left-hand side of an assignment.
+//
+// The main interface for interacting with this class is through its implicit
+// conversion operators. However, this class may also be used like a container
+// in that it has .begin() and .end() member functions. It may also be used
+// within a range-for loop.
+//
+// Output containers can be collections of any type that is constructible from
+// an absl::string_view.
+//
+// An Predicate functor may be supplied. This predicate will be used to filter
+// the split strings: only strings for which the predicate returns true will be
+// kept. A Predicate object is any unary functor that takes an absl::string_view
+// and returns bool.
+template <typename Delimiter, typename Predicate>
+class Splitter {
+ public:
+ using DelimiterType = Delimiter;
+ using PredicateType = Predicate;
+ using const_iterator = strings_internal::SplitIterator<Splitter>;
+ using value_type = typename std::iterator_traits<const_iterator>::value_type;
+
+ Splitter(ConvertibleToStringView input_text, Delimiter d, Predicate p)
+ : text_(std::move(input_text)),
+ delimiter_(std::move(d)),
+ predicate_(std::move(p)) {}
+
+ absl::string_view text() const { return text_.value(); }
+ const Delimiter& delimiter() const { return delimiter_; }
+ const Predicate& predicate() const { return predicate_; }
+
+ // Range functions that iterate the split substrings as absl::string_view
+ // objects. These methods enable a Splitter to be used in a range-based for
+ // loop.
+ const_iterator begin() const { return {const_iterator::kInitState, this}; }
+ const_iterator end() const { return {const_iterator::kEndState, this}; }
+
+ // An implicit conversion operator that is restricted to only those containers
+ // that the splitter is convertible to.
+ template <typename Container,
+ typename OnlyIf = typename SplitterIsConvertibleTo<Container>::type>
+ operator Container() const { // NOLINT(runtime/explicit)
+ return ConvertToContainer<Container, typename Container::value_type,
+ HasMappedType<Container>::value>()(*this);
+ }
+
+ // Returns a pair with its .first and .second members set to the first two
+ // strings returned by the begin() iterator. Either/both of .first and .second
+ // will be constructed with empty strings if the iterator doesn't have a
+ // corresponding value.
+ template <typename First, typename Second>
+ operator std::pair<First, Second>() const { // NOLINT(runtime/explicit)
+ absl::string_view first, second;
+ auto it = begin();
+ if (it != end()) {
+ first = *it;
+ if (++it != end()) {
+ second = *it;
+ }
+ }
+ return {First(first), Second(second)};
+ }
+
+ private:
+ // ConvertToContainer is a functor converting a Splitter to the requested
+ // Container of ValueType. It is specialized below to optimize splitting to
+ // certain combinations of Container and ValueType.
+ //
+ // This base template handles the generic case of storing the split results in
+ // the requested non-map-like container and converting the split substrings to
+ // the requested type.
+ template <typename Container, typename ValueType, bool is_map = false>
+ struct ConvertToContainer {
+ Container operator()(const Splitter& splitter) const {
+ Container c;
+ auto it = std::inserter(c, c.end());
+ for (const auto sp : splitter) {
+ *it++ = ValueType(sp);
+ }
+ return c;
+ }
+ };
+
+ // Partial specialization for a std::vector<absl::string_view>.
+ //
+ // Optimized for the common case of splitting to a
+ // std::vector<absl::string_view>. In this case we first split the results to
+ // a small array of absl::string_view on the stack, to reduce reallocations.
+ template <typename A>
+ struct ConvertToContainer<std::vector<absl::string_view, A>,
+ absl::string_view, false> {
+ std::vector<absl::string_view, A> operator()(
+ const Splitter& splitter) const {
+ struct raw_view {
+ const char* data;
+ size_t size;
+ operator absl::string_view() const { // NOLINT(runtime/explicit)
+ return {data, size};
+ }
+ };
+ std::vector<absl::string_view, A> v;
+ std::array<raw_view, 16> ar;
+ for (auto it = splitter.begin(); !it.at_end();) {
+ size_t index = 0;
+ do {
+ ar[index].data = it->data();
+ ar[index].size = it->size();
+ ++it;
+ } while (++index != ar.size() && !it.at_end());
+ v.insert(v.end(), ar.begin(), ar.begin() + index);
+ }
+ return v;
+ }
+ };
+
+ // Partial specialization for a std::vector<std::string>.
+ //
+ // Optimized for the common case of splitting to a std::vector<std::string>. In
+ // this case we first split the results to a std::vector<absl::string_view> so
+ // the returned std::vector<std::string> can have space reserved to avoid std::string
+ // moves.
+ template <typename A>
+ struct ConvertToContainer<std::vector<std::string, A>, std::string, false> {
+ std::vector<std::string, A> operator()(const Splitter& splitter) const {
+ const std::vector<absl::string_view> v = splitter;
+ return std::vector<std::string, A>(v.begin(), v.end());
+ }
+ };
+
+ // Partial specialization for containers of pairs (e.g., maps).
+ //
+ // The algorithm is to insert a new pair into the map for each even-numbered
+ // item, with the even-numbered item as the key with a default-constructed
+ // value. Each odd-numbered item will then be assigned to the last pair's
+ // value.
+ template <typename Container, typename First, typename Second>
+ struct ConvertToContainer<Container, std::pair<const First, Second>, true> {
+ Container operator()(const Splitter& splitter) const {
+ Container m;
+ typename Container::iterator it;
+ bool insert = true;
+ for (const auto sp : splitter) {
+ if (insert) {
+ it = Inserter<Container>::Insert(&m, First(sp), Second());
+ } else {
+ it->second = Second(sp);
+ }
+ insert = !insert;
+ }
+ return m;
+ }
+
+ // Inserts the key and value into the given map, returning an iterator to
+ // the inserted item. Specialized for std::map and std::multimap to use
+ // emplace() and adapt emplace()'s return value.
+ template <typename Map>
+ struct Inserter {
+ using M = Map;
+ template <typename... Args>
+ static typename M::iterator Insert(M* m, Args&&... args) {
+ return m->insert(std::make_pair(std::forward<Args>(args)...)).first;
+ }
+ };
+
+ template <typename... Ts>
+ struct Inserter<std::map<Ts...>> {
+ using M = std::map<Ts...>;
+ template <typename... Args>
+ static typename M::iterator Insert(M* m, Args&&... args) {
+ return m->emplace(std::make_pair(std::forward<Args>(args)...)).first;
+ }
+ };
+
+ template <typename... Ts>
+ struct Inserter<std::multimap<Ts...>> {
+ using M = std::multimap<Ts...>;
+ template <typename... Args>
+ static typename M::iterator Insert(M* m, Args&&... args) {
+ return m->emplace(std::make_pair(std::forward<Args>(args)...));
+ }
+ };
+ };
+
+ ConvertibleToStringView text_;
+ Delimiter delimiter_;
+ Predicate predicate_;
+};
+
+} // namespace strings_internal
+} // namespace absl
+
+#endif // ABSL_STRINGS_INTERNAL_STR_SPLIT_INTERNAL_H_
http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/utf8.cc
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diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/utf8.cc b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/utf8.cc
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+++ b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/utf8.cc
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+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// UTF8 utilities, implemented to reduce dependencies.
+
+#include "absl/strings/internal/utf8.h"
+
+namespace absl {
+namespace strings_internal {
+
+size_t EncodeUTF8Char(char *buffer, char32_t utf8_char) {
+ if (utf8_char <= 0x7F) {
+ *buffer = static_cast<char>(utf8_char);
+ return 1;
+ } else if (utf8_char <= 0x7FF) {
+ buffer[1] = 0x80 | (utf8_char & 0x3F);
+ utf8_char >>= 6;
+ buffer[0] = 0xC0 | utf8_char;
+ return 2;
+ } else if (utf8_char <= 0xFFFF) {
+ buffer[2] = 0x80 | (utf8_char & 0x3F);
+ utf8_char >>= 6;
+ buffer[1] = 0x80 | (utf8_char & 0x3F);
+ utf8_char >>= 6;
+ buffer[0] = 0xE0 | utf8_char;
+ return 3;
+ } else {
+ buffer[3] = 0x80 | (utf8_char & 0x3F);
+ utf8_char >>= 6;
+ buffer[2] = 0x80 | (utf8_char & 0x3F);
+ utf8_char >>= 6;
+ buffer[1] = 0x80 | (utf8_char & 0x3F);
+ utf8_char >>= 6;
+ buffer[0] = 0xF0 | utf8_char;
+ return 4;
+ }
+}
+
+} // namespace strings_internal
+} // namespace absl
http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/utf8.h
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diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/utf8.h b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/utf8.h
new file mode 100644
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+++ b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/utf8.h
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+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// UTF8 utilities, implemented to reduce dependencies.
+//
+
+#ifndef ABSL_STRINGS_INTERNAL_UTF8_H_
+#define ABSL_STRINGS_INTERNAL_UTF8_H_
+
+#include <cstddef>
+#include <cstdint>
+
+namespace absl {
+namespace strings_internal {
+
+// For Unicode code points 0 through 0x10FFFF, EncodeUTF8Char writes
+// out the UTF-8 encoding into buffer, and returns the number of chars
+// it wrote.
+//
+// As described in https://tools.ietf.org/html/rfc3629#section-3 , the encodings
+// are:
+// 00 - 7F : 0xxxxxxx
+// 80 - 7FF : 110xxxxx 10xxxxxx
+// 800 - FFFF : 1110xxxx 10xxxxxx 10xxxxxx
+// 10000 - 10FFFF : 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+//
+// Values greater than 0x10FFFF are not supported and may or may not write
+// characters into buffer, however never will more than kMaxEncodedUTF8Size
+// bytes be written, regardless of the value of utf8_char.
+enum { kMaxEncodedUTF8Size = 4 };
+size_t EncodeUTF8Char(char *buffer, char32_t utf8_char);
+
+} // namespace strings_internal
+} // namespace absl
+
+#endif // ABSL_STRINGS_INTERNAL_UTF8_H_
http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/utf8_test.cc
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diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/utf8_test.cc b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/utf8_test.cc
new file mode 100644
index 0000000..64cec70
--- /dev/null
+++ b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/internal/utf8_test.cc
@@ -0,0 +1,57 @@
+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/strings/internal/utf8.h"
+
+#include <cstdint>
+#include <utility>
+
+#include "gtest/gtest.h"
+#include "absl/base/port.h"
+
+namespace {
+
+TEST(EncodeUTF8Char, BasicFunction) {
+ std::pair<char32_t, std::string> tests[] = {{0x0030, u8"\u0030"},
+ {0x00A3, u8"\u00A3"},
+ {0x00010000, u8"\U00010000"},
+ {0x0000FFFF, u8"\U0000FFFF"},
+ {0x0010FFFD, u8"\U0010FFFD"}};
+ for (auto &test : tests) {
+ char buf0[7] = {'\x00', '\x00', '\x00', '\x00', '\x00', '\x00', '\x00'};
+ char buf1[7] = {'\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF', '\xFF'};
+ char *buf0_written =
+ &buf0[absl::strings_internal::EncodeUTF8Char(buf0, test.first)];
+ char *buf1_written =
+ &buf1[absl::strings_internal::EncodeUTF8Char(buf1, test.first)];
+ int apparent_length = 7;
+ while (buf0[apparent_length - 1] == '\x00' &&
+ buf1[apparent_length - 1] == '\xFF') {
+ if (--apparent_length == 0) break;
+ }
+ EXPECT_EQ(apparent_length, buf0_written - buf0);
+ EXPECT_EQ(apparent_length, buf1_written - buf1);
+ EXPECT_EQ(apparent_length, test.second.length());
+ EXPECT_EQ(std::string(buf0, apparent_length), test.second);
+ EXPECT_EQ(std::string(buf1, apparent_length), test.second);
+ }
+ char buf[32] = "Don't Tread On Me";
+ EXPECT_LE(absl::strings_internal::EncodeUTF8Char(buf, 0x00110000),
+ absl::strings_internal::kMaxEncodedUTF8Size);
+ char buf2[32] = "Negative is invalid but sane";
+ EXPECT_LE(absl::strings_internal::EncodeUTF8Char(buf2, -1),
+ absl::strings_internal::kMaxEncodedUTF8Size);
+}
+
+} // namespace
http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/strings/match.cc
----------------------------------------------------------------------
diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/strings/match.cc b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/match.cc
new file mode 100644
index 0000000..25bd7f0
--- /dev/null
+++ b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/match.cc
@@ -0,0 +1,40 @@
+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/strings/match.h"
+
+#include "absl/strings/internal/memutil.h"
+
+namespace absl {
+
+namespace {
+bool CaseEqual(absl::string_view piece1, absl::string_view piece2) {
+ return (piece1.size() == piece2.size() &&
+ 0 == strings_internal::memcasecmp(piece1.data(), piece2.data(),
+ piece1.size()));
+ // memcasecmp uses ascii_tolower().
+}
+} // namespace
+
+bool StartsWithIgnoreCase(absl::string_view text, absl::string_view prefix) {
+ return (text.size() >= prefix.size()) &&
+ CaseEqual(text.substr(0, prefix.size()), prefix);
+}
+
+bool EndsWithIgnoreCase(absl::string_view text, absl::string_view suffix) {
+ return (text.size() >= suffix.size()) &&
+ CaseEqual(text.substr(text.size() - suffix.size()), suffix);
+}
+
+} // namespace absl
http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/strings/match.h
----------------------------------------------------------------------
diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/strings/match.h b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/match.h
new file mode 100644
index 0000000..6005533
--- /dev/null
+++ b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/match.h
@@ -0,0 +1,84 @@
+//
+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: match.h
+// -----------------------------------------------------------------------------
+//
+// This file contains simple utilities for performing std::string matching checks.
+// All of these function parameters are specified as `absl::string_view`,
+// meaning that these functions can accept `std::string`, `absl::string_view` or
+// nul-terminated C-style strings.
+//
+// Examples:
+// std::string s = "foo";
+// absl::string_view sv = "f";
+// assert(absl::StrContains(s, sv));
+//
+// Note: The order of parameters in these functions is designed to mimic the
+// order an equivalent member function would exhibit;
+// e.g. `s.Contains(x)` ==> `absl::StrContains(s, x).
+#ifndef ABSL_STRINGS_MATCH_H_
+#define ABSL_STRINGS_MATCH_H_
+
+#include <cstring>
+
+#include "absl/strings/string_view.h"
+
+namespace absl {
+
+// StrContains()
+//
+// Returns whether a given std::string `haystack` contains the substring `needle`.
+inline bool StrContains(absl::string_view haystack, absl::string_view needle) {
+ return static_cast<absl::string_view::size_type>(haystack.find(needle, 0)) !=
+ haystack.npos;
+}
+
+// StartsWith()
+//
+// Returns whether a given std::string `text` begins with `prefix`.
+inline bool StartsWith(absl::string_view text, absl::string_view prefix) {
+ return prefix.empty() ||
+ (text.size() >= prefix.size() &&
+ memcmp(text.data(), prefix.data(), prefix.size()) == 0);
+}
+
+// EndsWith()
+//
+// Returns whether a given std::string `text` ends with `suffix`.
+inline bool EndsWith(absl::string_view text, absl::string_view suffix) {
+ return suffix.empty() ||
+ (text.size() >= suffix.size() &&
+ memcmp(text.data() + (text.size() - suffix.size()), suffix.data(),
+ suffix.size()) == 0
+ );
+}
+
+// StartsWithIgnoreCase()
+//
+// Returns whether a given std::string `text` starts with `starts_with`, ignoring
+// case in the comparison.
+bool StartsWithIgnoreCase(absl::string_view text, absl::string_view prefix);
+
+// EndsWithIgnoreCase()
+//
+// Returns whether a given std::string `text` ends with `ends_with`, ignoring case
+// in the comparison.
+bool EndsWithIgnoreCase(absl::string_view text, absl::string_view suffix);
+
+} // namespace absl
+
+#endif // ABSL_STRINGS_MATCH_H_
http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/strings/match_test.cc
----------------------------------------------------------------------
diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/strings/match_test.cc b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/match_test.cc
new file mode 100644
index 0000000..d194f0e
--- /dev/null
+++ b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/match_test.cc
@@ -0,0 +1,99 @@
+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/strings/match.h"
+
+#include "gtest/gtest.h"
+
+namespace {
+
+TEST(MatchTest, StartsWith) {
+ const std::string s1("123" "\0" "456", 7);
+ const absl::string_view a("foobar");
+ const absl::string_view b(s1);
+ const absl::string_view e;
+ EXPECT_TRUE(absl::StartsWith(a, a));
+ EXPECT_TRUE(absl::StartsWith(a, "foo"));
+ EXPECT_TRUE(absl::StartsWith(a, e));
+ EXPECT_TRUE(absl::StartsWith(b, s1));
+ EXPECT_TRUE(absl::StartsWith(b, b));
+ EXPECT_TRUE(absl::StartsWith(b, e));
+ EXPECT_TRUE(absl::StartsWith(e, ""));
+ EXPECT_FALSE(absl::StartsWith(a, b));
+ EXPECT_FALSE(absl::StartsWith(b, a));
+ EXPECT_FALSE(absl::StartsWith(e, a));
+}
+
+TEST(MatchTest, EndsWith) {
+ const std::string s1("123" "\0" "456", 7);
+ const absl::string_view a("foobar");
+ const absl::string_view b(s1);
+ const absl::string_view e;
+ EXPECT_TRUE(absl::EndsWith(a, a));
+ EXPECT_TRUE(absl::EndsWith(a, "bar"));
+ EXPECT_TRUE(absl::EndsWith(a, e));
+ EXPECT_TRUE(absl::EndsWith(b, s1));
+ EXPECT_TRUE(absl::EndsWith(b, b));
+ EXPECT_TRUE(absl::EndsWith(b, e));
+ EXPECT_TRUE(absl::EndsWith(e, ""));
+ EXPECT_FALSE(absl::EndsWith(a, b));
+ EXPECT_FALSE(absl::EndsWith(b, a));
+ EXPECT_FALSE(absl::EndsWith(e, a));
+}
+
+TEST(MatchTest, Contains) {
+ absl::string_view a("abcdefg");
+ absl::string_view b("abcd");
+ absl::string_view c("efg");
+ absl::string_view d("gh");
+ EXPECT_TRUE(absl::StrContains(a, a));
+ EXPECT_TRUE(absl::StrContains(a, b));
+ EXPECT_TRUE(absl::StrContains(a, c));
+ EXPECT_FALSE(absl::StrContains(a, d));
+ EXPECT_TRUE(absl::StrContains("", ""));
+ EXPECT_TRUE(absl::StrContains("abc", ""));
+ EXPECT_FALSE(absl::StrContains("", "a"));
+}
+
+TEST(MatchTest, ContainsNull) {
+ const std::string s = "foo";
+ const char* cs = "foo";
+ const absl::string_view sv("foo");
+ const absl::string_view sv2("foo\0bar", 4);
+ EXPECT_EQ(s, "foo");
+ EXPECT_EQ(sv, "foo");
+ EXPECT_NE(sv2, "foo");
+ EXPECT_TRUE(absl::EndsWith(s, sv));
+ EXPECT_TRUE(absl::StartsWith(cs, sv));
+ EXPECT_TRUE(absl::StrContains(cs, sv));
+ EXPECT_FALSE(absl::StrContains(cs, sv2));
+}
+
+TEST(MatchTest, StartsWithIgnoreCase) {
+ EXPECT_TRUE(absl::StartsWithIgnoreCase("foo", "foo"));
+ EXPECT_TRUE(absl::StartsWithIgnoreCase("foo", "Fo"));
+ EXPECT_TRUE(absl::StartsWithIgnoreCase("foo", ""));
+ EXPECT_FALSE(absl::StartsWithIgnoreCase("foo", "fooo"));
+ EXPECT_FALSE(absl::StartsWithIgnoreCase("", "fo"));
+}
+
+TEST(MatchTest, EndsWithIgnoreCase) {
+ EXPECT_TRUE(absl::EndsWithIgnoreCase("foo", "foo"));
+ EXPECT_TRUE(absl::EndsWithIgnoreCase("foo", "Oo"));
+ EXPECT_TRUE(absl::EndsWithIgnoreCase("foo", ""));
+ EXPECT_FALSE(absl::EndsWithIgnoreCase("foo", "fooo"));
+ EXPECT_FALSE(absl::EndsWithIgnoreCase("", "fo"));
+}
+
+} // namespace
http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/strings/numbers.cc
----------------------------------------------------------------------
diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/strings/numbers.cc b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/numbers.cc
new file mode 100644
index 0000000..b4140b3
--- /dev/null
+++ b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/numbers.cc
@@ -0,0 +1,919 @@
+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// This file contains std::string processing functions related to
+// numeric values.
+
+#include "absl/strings/numbers.h"
+
+#include <algorithm>
+#include <cassert>
+#include <cfloat> // for DBL_DIG and FLT_DIG
+#include <cmath> // for HUGE_VAL
+#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <iterator>
+#include <limits>
+#include <memory>
+#include <utility>
+
+#include "absl/base/internal/raw_logging.h"
+#include "absl/strings/ascii.h"
+#include "absl/strings/internal/memutil.h"
+#include "absl/strings/str_cat.h"
+
+namespace absl {
+
+bool SimpleAtof(absl::string_view str, float* value) {
+ *value = 0.0;
+ if (str.empty()) return false;
+ char buf[32];
+ std::unique_ptr<char[]> bigbuf;
+ char* ptr = buf;
+ if (str.size() > sizeof(buf) - 1) {
+ bigbuf.reset(new char[str.size() + 1]);
+ ptr = bigbuf.get();
+ }
+ memcpy(ptr, str.data(), str.size());
+ ptr[str.size()] = '\0';
+
+ char* endptr;
+ *value = strtof(ptr, &endptr);
+ if (endptr != ptr) {
+ while (absl::ascii_isspace(*endptr)) ++endptr;
+ }
+ // Ignore range errors from strtod/strtof.
+ // The values it returns on underflow and
+ // overflow are the right fallback in a
+ // robust setting.
+ return *ptr != '\0' && *endptr == '\0';
+}
+
+bool SimpleAtod(absl::string_view str, double* value) {
+ *value = 0.0;
+ if (str.empty()) return false;
+ char buf[32];
+ std::unique_ptr<char[]> bigbuf;
+ char* ptr = buf;
+ if (str.size() > sizeof(buf) - 1) {
+ bigbuf.reset(new char[str.size() + 1]);
+ ptr = bigbuf.get();
+ }
+ memcpy(ptr, str.data(), str.size());
+ ptr[str.size()] = '\0';
+
+ char* endptr;
+ *value = strtod(ptr, &endptr);
+ if (endptr != ptr) {
+ while (absl::ascii_isspace(*endptr)) ++endptr;
+ }
+ // Ignore range errors from strtod. The values it
+ // returns on underflow and overflow are the right
+ // fallback in a robust setting.
+ return *ptr != '\0' && *endptr == '\0';
+}
+
+namespace {
+
+// TODO(rogeeff): replace with the real released thing once we figure out what
+// it is.
+inline bool CaseEqual(absl::string_view piece1, absl::string_view piece2) {
+ return (piece1.size() == piece2.size() &&
+ 0 == strings_internal::memcasecmp(piece1.data(), piece2.data(),
+ piece1.size()));
+}
+
+// Writes a two-character representation of 'i' to 'buf'. 'i' must be in the
+// range 0 <= i < 100, and buf must have space for two characters. Example:
+// char buf[2];
+// PutTwoDigits(42, buf);
+// // buf[0] == '4'
+// // buf[1] == '2'
+inline void PutTwoDigits(size_t i, char* buf) {
+ static const char two_ASCII_digits[100][2] = {
+ {'0', '0'}, {'0', '1'}, {'0', '2'}, {'0', '3'}, {'0', '4'},
+ {'0', '5'}, {'0', '6'}, {'0', '7'}, {'0', '8'}, {'0', '9'},
+ {'1', '0'}, {'1', '1'}, {'1', '2'}, {'1', '3'}, {'1', '4'},
+ {'1', '5'}, {'1', '6'}, {'1', '7'}, {'1', '8'}, {'1', '9'},
+ {'2', '0'}, {'2', '1'}, {'2', '2'}, {'2', '3'}, {'2', '4'},
+ {'2', '5'}, {'2', '6'}, {'2', '7'}, {'2', '8'}, {'2', '9'},
+ {'3', '0'}, {'3', '1'}, {'3', '2'}, {'3', '3'}, {'3', '4'},
+ {'3', '5'}, {'3', '6'}, {'3', '7'}, {'3', '8'}, {'3', '9'},
+ {'4', '0'}, {'4', '1'}, {'4', '2'}, {'4', '3'}, {'4', '4'},
+ {'4', '5'}, {'4', '6'}, {'4', '7'}, {'4', '8'}, {'4', '9'},
+ {'5', '0'}, {'5', '1'}, {'5', '2'}, {'5', '3'}, {'5', '4'},
+ {'5', '5'}, {'5', '6'}, {'5', '7'}, {'5', '8'}, {'5', '9'},
+ {'6', '0'}, {'6', '1'}, {'6', '2'}, {'6', '3'}, {'6', '4'},
+ {'6', '5'}, {'6', '6'}, {'6', '7'}, {'6', '8'}, {'6', '9'},
+ {'7', '0'}, {'7', '1'}, {'7', '2'}, {'7', '3'}, {'7', '4'},
+ {'7', '5'}, {'7', '6'}, {'7', '7'}, {'7', '8'}, {'7', '9'},
+ {'8', '0'}, {'8', '1'}, {'8', '2'}, {'8', '3'}, {'8', '4'},
+ {'8', '5'}, {'8', '6'}, {'8', '7'}, {'8', '8'}, {'8', '9'},
+ {'9', '0'}, {'9', '1'}, {'9', '2'}, {'9', '3'}, {'9', '4'},
+ {'9', '5'}, {'9', '6'}, {'9', '7'}, {'9', '8'}, {'9', '9'}
+ };
+ assert(i < 100);
+ memcpy(buf, two_ASCII_digits[i], 2);
+}
+
+} // namespace
+
+bool SimpleAtob(absl::string_view str, bool* value) {
+ ABSL_RAW_CHECK(value != nullptr, "Output pointer must not be nullptr.");
+ if (CaseEqual(str, "true") || CaseEqual(str, "t") ||
+ CaseEqual(str, "yes") || CaseEqual(str, "y") ||
+ CaseEqual(str, "1")) {
+ *value = true;
+ return true;
+ }
+ if (CaseEqual(str, "false") || CaseEqual(str, "f") ||
+ CaseEqual(str, "no") || CaseEqual(str, "n") ||
+ CaseEqual(str, "0")) {
+ *value = false;
+ return true;
+ }
+ return false;
+}
+
+// ----------------------------------------------------------------------
+// FastIntToBuffer() overloads
+//
+// Like the Fast*ToBuffer() functions above, these are intended for speed.
+// Unlike the Fast*ToBuffer() functions, however, these functions write
+// their output to the beginning of the buffer. The caller is responsible
+// for ensuring that the buffer has enough space to hold the output.
+//
+// Returns a pointer to the end of the std::string (i.e. the null character
+// terminating the std::string).
+// ----------------------------------------------------------------------
+
+namespace {
+
+// Used to optimize printing a decimal number's final digit.
+const char one_ASCII_final_digits[10][2] {
+ {'0', 0}, {'1', 0}, {'2', 0}, {'3', 0}, {'4', 0},
+ {'5', 0}, {'6', 0}, {'7', 0}, {'8', 0}, {'9', 0},
+};
+
+} // namespace
+
+char* numbers_internal::FastIntToBuffer(uint32_t i, char* buffer) {
+ uint32_t digits;
+ // The idea of this implementation is to trim the number of divides to as few
+ // as possible, and also reducing memory stores and branches, by going in
+ // steps of two digits at a time rather than one whenever possible.
+ // The huge-number case is first, in the hopes that the compiler will output
+ // that case in one branch-free block of code, and only output conditional
+ // branches into it from below.
+ if (i >= 1000000000) { // >= 1,000,000,000
+ digits = i / 100000000; // 100,000,000
+ i -= digits * 100000000;
+ PutTwoDigits(digits, buffer);
+ buffer += 2;
+ lt100_000_000:
+ digits = i / 1000000; // 1,000,000
+ i -= digits * 1000000;
+ PutTwoDigits(digits, buffer);
+ buffer += 2;
+ lt1_000_000:
+ digits = i / 10000; // 10,000
+ i -= digits * 10000;
+ PutTwoDigits(digits, buffer);
+ buffer += 2;
+ lt10_000:
+ digits = i / 100;
+ i -= digits * 100;
+ PutTwoDigits(digits, buffer);
+ buffer += 2;
+ lt100:
+ digits = i;
+ PutTwoDigits(digits, buffer);
+ buffer += 2;
+ *buffer = 0;
+ return buffer;
+ }
+
+ if (i < 100) {
+ digits = i;
+ if (i >= 10) goto lt100;
+ memcpy(buffer, one_ASCII_final_digits[i], 2);
+ return buffer + 1;
+ }
+ if (i < 10000) { // 10,000
+ if (i >= 1000) goto lt10_000;
+ digits = i / 100;
+ i -= digits * 100;
+ *buffer++ = '0' + digits;
+ goto lt100;
+ }
+ if (i < 1000000) { // 1,000,000
+ if (i >= 100000) goto lt1_000_000;
+ digits = i / 10000; // 10,000
+ i -= digits * 10000;
+ *buffer++ = '0' + digits;
+ goto lt10_000;
+ }
+ if (i < 100000000) { // 100,000,000
+ if (i >= 10000000) goto lt100_000_000;
+ digits = i / 1000000; // 1,000,000
+ i -= digits * 1000000;
+ *buffer++ = '0' + digits;
+ goto lt1_000_000;
+ }
+ // we already know that i < 1,000,000,000
+ digits = i / 100000000; // 100,000,000
+ i -= digits * 100000000;
+ *buffer++ = '0' + digits;
+ goto lt100_000_000;
+}
+
+char* numbers_internal::FastIntToBuffer(int32_t i, char* buffer) {
+ uint32_t u = i;
+ if (i < 0) {
+ *buffer++ = '-';
+ // We need to do the negation in modular (i.e., "unsigned")
+ // arithmetic; MSVC++ apprently warns for plain "-u", so
+ // we write the equivalent expression "0 - u" instead.
+ u = 0 - u;
+ }
+ return numbers_internal::FastIntToBuffer(u, buffer);
+}
+
+char* numbers_internal::FastIntToBuffer(uint64_t i, char* buffer) {
+ uint32_t u32 = static_cast<uint32_t>(i);
+ if (u32 == i) return numbers_internal::FastIntToBuffer(u32, buffer);
+
+ // Here we know i has at least 10 decimal digits.
+ uint64_t top_1to11 = i / 1000000000;
+ u32 = static_cast<uint32_t>(i - top_1to11 * 1000000000);
+ uint32_t top_1to11_32 = static_cast<uint32_t>(top_1to11);
+
+ if (top_1to11_32 == top_1to11) {
+ buffer = numbers_internal::FastIntToBuffer(top_1to11_32, buffer);
+ } else {
+ // top_1to11 has more than 32 bits too; print it in two steps.
+ uint32_t top_8to9 = static_cast<uint32_t>(top_1to11 / 100);
+ uint32_t mid_2 = static_cast<uint32_t>(top_1to11 - top_8to9 * 100);
+ buffer = numbers_internal::FastIntToBuffer(top_8to9, buffer);
+ PutTwoDigits(mid_2, buffer);
+ buffer += 2;
+ }
+
+ // We have only 9 digits now, again the maximum uint32_t can handle fully.
+ uint32_t digits = u32 / 10000000; // 10,000,000
+ u32 -= digits * 10000000;
+ PutTwoDigits(digits, buffer);
+ buffer += 2;
+ digits = u32 / 100000; // 100,000
+ u32 -= digits * 100000;
+ PutTwoDigits(digits, buffer);
+ buffer += 2;
+ digits = u32 / 1000; // 1,000
+ u32 -= digits * 1000;
+ PutTwoDigits(digits, buffer);
+ buffer += 2;
+ digits = u32 / 10;
+ u32 -= digits * 10;
+ PutTwoDigits(digits, buffer);
+ buffer += 2;
+ memcpy(buffer, one_ASCII_final_digits[u32], 2);
+ return buffer + 1;
+}
+
+char* numbers_internal::FastIntToBuffer(int64_t i, char* buffer) {
+ uint64_t u = i;
+ if (i < 0) {
+ *buffer++ = '-';
+ u = 0 - u;
+ }
+ return numbers_internal::FastIntToBuffer(u, buffer);
+}
+
+// Returns the number of leading 0 bits in a 64-bit value.
+// TODO(jorg): Replace with builtin_clzll if available.
+// Are we shipping util/bits in absl?
+static inline int CountLeadingZeros64(uint64_t n) {
+ int zeroes = 60;
+ if (n >> 32) zeroes -= 32, n >>= 32;
+ if (n >> 16) zeroes -= 16, n >>= 16;
+ if (n >> 8) zeroes -= 8, n >>= 8;
+ if (n >> 4) zeroes -= 4, n >>= 4;
+ return "\4\3\2\2\1\1\1\1\0\0\0\0\0\0\0\0"[n] + zeroes;
+}
+
+// Given a 128-bit number expressed as a pair of uint64_t, high half first,
+// return that number multiplied by the given 32-bit value. If the result is
+// too large to fit in a 128-bit number, divide it by 2 until it fits.
+static std::pair<uint64_t, uint64_t> Mul32(std::pair<uint64_t, uint64_t> num,
+ uint32_t mul) {
+ uint64_t bits0_31 = num.second & 0xFFFFFFFF;
+ uint64_t bits32_63 = num.second >> 32;
+ uint64_t bits64_95 = num.first & 0xFFFFFFFF;
+ uint64_t bits96_127 = num.first >> 32;
+
+ // The picture so far: each of these 64-bit values has only the lower 32 bits
+ // filled in.
+ // bits96_127: [ 00000000 xxxxxxxx ]
+ // bits64_95: [ 00000000 xxxxxxxx ]
+ // bits32_63: [ 00000000 xxxxxxxx ]
+ // bits0_31: [ 00000000 xxxxxxxx ]
+
+ bits0_31 *= mul;
+ bits32_63 *= mul;
+ bits64_95 *= mul;
+ bits96_127 *= mul;
+
+ // Now the top halves may also have value, though all 64 of their bits will
+ // never be set at the same time, since they are a result of a 32x32 bit
+ // multiply. This makes the carry calculation slightly easier.
+ // bits96_127: [ mmmmmmmm | mmmmmmmm ]
+ // bits64_95: [ | mmmmmmmm mmmmmmmm | ]
+ // bits32_63: | [ mmmmmmmm | mmmmmmmm ]
+ // bits0_31: | [ | mmmmmmmm mmmmmmmm ]
+ // eventually: [ bits128_up | ...bits64_127.... | ..bits0_63... ]
+
+ uint64_t bits0_63 = bits0_31 + (bits32_63 << 32);
+ uint64_t bits64_127 = bits64_95 + (bits96_127 << 32) + (bits32_63 >> 32) +
+ (bits0_63 < bits0_31);
+ uint64_t bits128_up = (bits96_127 >> 32) + (bits64_127 < bits64_95);
+ if (bits128_up == 0) return {bits64_127, bits0_63};
+
+ int shift = 64 - CountLeadingZeros64(bits128_up);
+ uint64_t lo = (bits0_63 >> shift) + (bits64_127 << (64 - shift));
+ uint64_t hi = (bits64_127 >> shift) + (bits128_up << (64 - shift));
+ return {hi, lo};
+}
+
+// Compute num * 5 ^ expfive, and return the first 128 bits of the result,
+// where the first bit is always a one. So PowFive(1, 0) starts 0b100000,
+// PowFive(1, 1) starts 0b101000, PowFive(1, 2) starts 0b110010, etc.
+static std::pair<uint64_t, uint64_t> PowFive(uint64_t num, int expfive) {
+ std::pair<uint64_t, uint64_t> result = {num, 0};
+ while (expfive >= 13) {
+ // 5^13 is the highest power of five that will fit in a 32-bit integer.
+ result = Mul32(result, 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5);
+ expfive -= 13;
+ }
+ constexpr int powers_of_five[13] = {
+ 1,
+ 5,
+ 5 * 5,
+ 5 * 5 * 5,
+ 5 * 5 * 5 * 5,
+ 5 * 5 * 5 * 5 * 5,
+ 5 * 5 * 5 * 5 * 5 * 5,
+ 5 * 5 * 5 * 5 * 5 * 5 * 5,
+ 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+ 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+ 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+ 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+ 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5};
+ result = Mul32(result, powers_of_five[expfive & 15]);
+ int shift = CountLeadingZeros64(result.first);
+ if (shift != 0) {
+ result.first = (result.first << shift) + (result.second >> (64 - shift));
+ result.second = (result.second << shift);
+ }
+ return result;
+}
+
+struct ExpDigits {
+ int32_t exponent;
+ char digits[6];
+};
+
+// SplitToSix converts value, a positive double-precision floating-point number,
+// into a base-10 exponent and 6 ASCII digits, where the first digit is never
+// zero. For example, SplitToSix(1) returns an exponent of zero and a digits
+// array of {'1', '0', '0', '0', '0', '0'}. If value is exactly halfway between
+// two possible representations, e.g. value = 100000.5, then "round to even" is
+// performed.
+static ExpDigits SplitToSix(const double value) {
+ ExpDigits exp_dig;
+ int exp = 5;
+ double d = value;
+ // First step: calculate a close approximation of the output, where the
+ // value d will be between 100,000 and 999,999, representing the digits
+ // in the output ASCII array, and exp is the base-10 exponent. It would be
+ // faster to use a table here, and to look up the base-2 exponent of value,
+ // however value is an IEEE-754 64-bit number, so the table would have 2,000
+ // entries, which is not cache-friendly.
+ if (d >= 999999.5) {
+ if (d >= 1e+261) exp += 256, d *= 1e-256;
+ if (d >= 1e+133) exp += 128, d *= 1e-128;
+ if (d >= 1e+69) exp += 64, d *= 1e-64;
+ if (d >= 1e+37) exp += 32, d *= 1e-32;
+ if (d >= 1e+21) exp += 16, d *= 1e-16;
+ if (d >= 1e+13) exp += 8, d *= 1e-8;
+ if (d >= 1e+9) exp += 4, d *= 1e-4;
+ if (d >= 1e+7) exp += 2, d *= 1e-2;
+ if (d >= 1e+6) exp += 1, d *= 1e-1;
+ } else {
+ if (d < 1e-250) exp -= 256, d *= 1e256;
+ if (d < 1e-122) exp -= 128, d *= 1e128;
+ if (d < 1e-58) exp -= 64, d *= 1e64;
+ if (d < 1e-26) exp -= 32, d *= 1e32;
+ if (d < 1e-10) exp -= 16, d *= 1e16;
+ if (d < 1e-2) exp -= 8, d *= 1e8;
+ if (d < 1e+2) exp -= 4, d *= 1e4;
+ if (d < 1e+4) exp -= 2, d *= 1e2;
+ if (d < 1e+5) exp -= 1, d *= 1e1;
+ }
+ // At this point, d is in the range [99999.5..999999.5) and exp is in the
+ // range [-324..308]. Since we need to round d up, we want to add a half
+ // and truncate.
+ // However, the technique above may have lost some precision, due to its
+ // repeated multiplication by constants that each may be off by half a bit
+ // of precision. This only matters if we're close to the edge though.
+ // Since we'd like to know if the fractional part of d is close to a half,
+ // we multiply it by 65536 and see if the fractional part is close to 32768.
+ // (The number doesn't have to be a power of two,but powers of two are faster)
+ uint64_t d64k = d * 65536;
+ int dddddd; // A 6-digit decimal integer.
+ if ((d64k % 65536) == 32767 || (d64k % 65536) == 32768) {
+ // OK, it's fairly likely that precision was lost above, which is
+ // not a surprise given only 52 mantissa bits are available. Therefore
+ // redo the calculation using 128-bit numbers. (64 bits are not enough).
+
+ // Start out with digits rounded down; maybe add one below.
+ dddddd = static_cast<int>(d64k / 65536);
+
+ // mantissa is a 64-bit integer representing M.mmm... * 2^63. The actual
+ // value we're representing, of course, is M.mmm... * 2^exp2.
+ int exp2;
+ double m = std::frexp(value, &exp2);
+ uint64_t mantissa = m * (32768.0 * 65536.0 * 65536.0 * 65536.0);
+ // std::frexp returns an m value in the range [0.5, 1.0), however we
+ // can't multiply it by 2^64 and convert to an integer because some FPUs
+ // throw an exception when converting an number higher than 2^63 into an
+ // integer - even an unsigned 64-bit integer! Fortunately it doesn't matter
+ // since m only has 52 significant bits anyway.
+ mantissa <<= 1;
+ exp2 -= 64; // not needed, but nice for debugging
+
+ // OK, we are here to compare:
+ // (dddddd + 0.5) * 10^(exp-5) vs. mantissa * 2^exp2
+ // so we can round up dddddd if appropriate. Those values span the full
+ // range of 600 orders of magnitude of IEE 64-bit floating-point.
+ // Fortunately, we already know they are very close, so we don't need to
+ // track the base-2 exponent of both sides. This greatly simplifies the
+ // the math since the 2^exp2 calculation is unnecessary and the power-of-10
+ // calculation can become a power-of-5 instead.
+
+ std::pair<uint64_t, uint64_t> edge, val;
+ if (exp >= 6) {
+ // Compare (dddddd + 0.5) * 5 ^ (exp - 5) to mantissa
+ // Since we're tossing powers of two, 2 * dddddd + 1 is the
+ // same as dddddd + 0.5
+ edge = PowFive(2 * dddddd + 1, exp - 5);
+
+ val.first = mantissa;
+ val.second = 0;
+ } else {
+ // We can't compare (dddddd + 0.5) * 5 ^ (exp - 5) to mantissa as we did
+ // above because (exp - 5) is negative. So we compare (dddddd + 0.5) to
+ // mantissa * 5 ^ (5 - exp)
+ edge = PowFive(2 * dddddd + 1, 0);
+
+ val = PowFive(mantissa, 5 - exp);
+ }
+ // printf("exp=%d %016lx %016lx vs %016lx %016lx\n", exp, val.first,
+ // val.second, edge.first, edge.second);
+ if (val > edge) {
+ dddddd++;
+ } else if (val == edge) {
+ dddddd += (dddddd & 1);
+ }
+ } else {
+ // Here, we are not close to the edge.
+ dddddd = static_cast<int>((d64k + 32768) / 65536);
+ }
+ if (dddddd == 1000000) {
+ dddddd = 100000;
+ exp += 1;
+ }
+ exp_dig.exponent = exp;
+
+ int two_digits = dddddd / 10000;
+ dddddd -= two_digits * 10000;
+ PutTwoDigits(two_digits, &exp_dig.digits[0]);
+
+ two_digits = dddddd / 100;
+ dddddd -= two_digits * 100;
+ PutTwoDigits(two_digits, &exp_dig.digits[2]);
+
+ PutTwoDigits(dddddd, &exp_dig.digits[4]);
+ return exp_dig;
+}
+
+// Helper function for fast formatting of floating-point.
+// The result is the same as "%g", a.k.a. "%.6g".
+size_t numbers_internal::SixDigitsToBuffer(double d, char* const buffer) {
+ static_assert(std::numeric_limits<float>::is_iec559,
+ "IEEE-754/IEC-559 support only");
+
+ char* out = buffer; // we write data to out, incrementing as we go, but
+ // FloatToBuffer always returns the address of the buffer
+ // passed in.
+
+ if (std::isnan(d)) {
+ strcpy(out, "nan"); // NOLINT(runtime/printf)
+ return 3;
+ }
+ if (d == 0) { // +0 and -0 are handled here
+ if (std::signbit(d)) *out++ = '-';
+ *out++ = '0';
+ *out = 0;
+ return out - buffer;
+ }
+ if (d < 0) {
+ *out++ = '-';
+ d = -d;
+ }
+ if (std::isinf(d)) {
+ strcpy(out, "inf"); // NOLINT(runtime/printf)
+ return out + 3 - buffer;
+ }
+
+ auto exp_dig = SplitToSix(d);
+ int exp = exp_dig.exponent;
+ const char* digits = exp_dig.digits;
+ out[0] = '0';
+ out[1] = '.';
+ switch (exp) {
+ case 5:
+ memcpy(out, &digits[0], 6), out += 6;
+ *out = 0;
+ return out - buffer;
+ case 4:
+ memcpy(out, &digits[0], 5), out += 5;
+ if (digits[5] != '0') {
+ *out++ = '.';
+ *out++ = digits[5];
+ }
+ *out = 0;
+ return out - buffer;
+ case 3:
+ memcpy(out, &digits[0], 4), out += 4;
+ if ((digits[5] | digits[4]) != '0') {
+ *out++ = '.';
+ *out++ = digits[4];
+ if (digits[5] != '0') *out++ = digits[5];
+ }
+ *out = 0;
+ return out - buffer;
+ case 2:
+ memcpy(out, &digits[0], 3), out += 3;
+ *out++ = '.';
+ memcpy(out, &digits[3], 3);
+ out += 3;
+ while (out[-1] == '0') --out;
+ if (out[-1] == '.') --out;
+ *out = 0;
+ return out - buffer;
+ case 1:
+ memcpy(out, &digits[0], 2), out += 2;
+ *out++ = '.';
+ memcpy(out, &digits[2], 4);
+ out += 4;
+ while (out[-1] == '0') --out;
+ if (out[-1] == '.') --out;
+ *out = 0;
+ return out - buffer;
+ case 0:
+ memcpy(out, &digits[0], 1), out += 1;
+ *out++ = '.';
+ memcpy(out, &digits[1], 5);
+ out += 5;
+ while (out[-1] == '0') --out;
+ if (out[-1] == '.') --out;
+ *out = 0;
+ return out - buffer;
+ case -4:
+ out[2] = '0';
+ ++out;
+ ABSL_FALLTHROUGH_INTENDED;
+ case -3:
+ out[2] = '0';
+ ++out;
+ ABSL_FALLTHROUGH_INTENDED;
+ case -2:
+ out[2] = '0';
+ ++out;
+ ABSL_FALLTHROUGH_INTENDED;
+ case -1:
+ out += 2;
+ memcpy(out, &digits[0], 6);
+ out += 6;
+ while (out[-1] == '0') --out;
+ *out = 0;
+ return out - buffer;
+ }
+ assert(exp < -4 || exp >= 6);
+ out[0] = digits[0];
+ assert(out[1] == '.');
+ out += 2;
+ memcpy(out, &digits[1], 5), out += 5;
+ while (out[-1] == '0') --out;
+ if (out[-1] == '.') --out;
+ *out++ = 'e';
+ if (exp > 0) {
+ *out++ = '+';
+ } else {
+ *out++ = '-';
+ exp = -exp;
+ }
+ if (exp > 99) {
+ int dig1 = exp / 100;
+ exp -= dig1 * 100;
+ *out++ = '0' + dig1;
+ }
+ PutTwoDigits(exp, out);
+ out += 2;
+ *out = 0;
+ return out - buffer;
+}
+
+namespace {
+// Represents integer values of digits.
+// Uses 36 to indicate an invalid character since we support
+// bases up to 36.
+static const int8_t kAsciiToInt[256] = {
+ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, // 16 36s.
+ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
+ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 0, 1, 2, 3, 4, 5,
+ 6, 7, 8, 9, 36, 36, 36, 36, 36, 36, 36, 10, 11, 12, 13, 14, 15, 16, 17,
+ 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36,
+ 36, 36, 36, 36, 36, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
+ 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 36, 36, 36, 36, 36, 36,
+ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
+ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
+ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
+ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
+ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
+ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
+ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36};
+
+// Parse the sign and optional hex or oct prefix in text.
+inline bool safe_parse_sign_and_base(absl::string_view* text /*inout*/,
+ int* base_ptr /*inout*/,
+ bool* negative_ptr /*output*/) {
+ if (text->data() == nullptr) {
+ return false;
+ }
+
+ const char* start = text->data();
+ const char* end = start + text->size();
+ int base = *base_ptr;
+
+ // Consume whitespace.
+ while (start < end && absl::ascii_isspace(start[0])) {
+ ++start;
+ }
+ while (start < end && absl::ascii_isspace(end[-1])) {
+ --end;
+ }
+ if (start >= end) {
+ return false;
+ }
+
+ // Consume sign.
+ *negative_ptr = (start[0] == '-');
+ if (*negative_ptr || start[0] == '+') {
+ ++start;
+ if (start >= end) {
+ return false;
+ }
+ }
+
+ // Consume base-dependent prefix.
+ // base 0: "0x" -> base 16, "0" -> base 8, default -> base 10
+ // base 16: "0x" -> base 16
+ // Also validate the base.
+ if (base == 0) {
+ if (end - start >= 2 && start[0] == '0' &&
+ (start[1] == 'x' || start[1] == 'X')) {
+ base = 16;
+ start += 2;
+ if (start >= end) {
+ // "0x" with no digits after is invalid.
+ return false;
+ }
+ } else if (end - start >= 1 && start[0] == '0') {
+ base = 8;
+ start += 1;
+ } else {
+ base = 10;
+ }
+ } else if (base == 16) {
+ if (end - start >= 2 && start[0] == '0' &&
+ (start[1] == 'x' || start[1] == 'X')) {
+ start += 2;
+ if (start >= end) {
+ // "0x" with no digits after is invalid.
+ return false;
+ }
+ }
+ } else if (base >= 2 && base <= 36) {
+ // okay
+ } else {
+ return false;
+ }
+ *text = absl::string_view(start, end - start);
+ *base_ptr = base;
+ return true;
+}
+
+// Consume digits.
+//
+// The classic loop:
+//
+// for each digit
+// value = value * base + digit
+// value *= sign
+//
+// The classic loop needs overflow checking. It also fails on the most
+// negative integer, -2147483648 in 32-bit two's complement representation.
+//
+// My improved loop:
+//
+// if (!negative)
+// for each digit
+// value = value * base
+// value = value + digit
+// else
+// for each digit
+// value = value * base
+// value = value - digit
+//
+// Overflow checking becomes simple.
+
+// Lookup tables per IntType:
+// vmax/base and vmin/base are precomputed because division costs at least 8ns.
+// TODO(junyer): Doing this per base instead (i.e. an array of structs, not a
+// struct of arrays) would probably be better in terms of d-cache for the most
+// commonly used bases.
+template <typename IntType>
+struct LookupTables {
+ static const IntType kVmaxOverBase[];
+ static const IntType kVminOverBase[];
+};
+
+// An array initializer macro for X/base where base in [0, 36].
+// However, note that lookups for base in [0, 1] should never happen because
+// base has been validated to be in [2, 36] by safe_parse_sign_and_base().
+#define X_OVER_BASE_INITIALIZER(X) \
+ { \
+ 0, 0, X / 2, X / 3, X / 4, X / 5, X / 6, X / 7, X / 8, X / 9, X / 10, \
+ X / 11, X / 12, X / 13, X / 14, X / 15, X / 16, X / 17, X / 18, \
+ X / 19, X / 20, X / 21, X / 22, X / 23, X / 24, X / 25, X / 26, \
+ X / 27, X / 28, X / 29, X / 30, X / 31, X / 32, X / 33, X / 34, \
+ X / 35, X / 36, \
+ }
+
+template <typename IntType>
+const IntType LookupTables<IntType>::kVmaxOverBase[] =
+ X_OVER_BASE_INITIALIZER(std::numeric_limits<IntType>::max());
+
+template <typename IntType>
+const IntType LookupTables<IntType>::kVminOverBase[] =
+ X_OVER_BASE_INITIALIZER(std::numeric_limits<IntType>::min());
+
+#undef X_OVER_BASE_INITIALIZER
+
+template <typename IntType>
+inline bool safe_parse_positive_int(absl::string_view text, int base,
+ IntType* value_p) {
+ IntType value = 0;
+ const IntType vmax = std::numeric_limits<IntType>::max();
+ assert(vmax > 0);
+ assert(base >= 0);
+ assert(vmax >= static_cast<IntType>(base));
+ const IntType vmax_over_base = LookupTables<IntType>::kVmaxOverBase[base];
+ const char* start = text.data();
+ const char* end = start + text.size();
+ // loop over digits
+ for (; start < end; ++start) {
+ unsigned char c = static_cast<unsigned char>(start[0]);
+ int digit = kAsciiToInt[c];
+ if (digit >= base) {
+ *value_p = value;
+ return false;
+ }
+ if (value > vmax_over_base) {
+ *value_p = vmax;
+ return false;
+ }
+ value *= base;
+ if (value > vmax - digit) {
+ *value_p = vmax;
+ return false;
+ }
+ value += digit;
+ }
+ *value_p = value;
+ return true;
+}
+
+template <typename IntType>
+inline bool safe_parse_negative_int(absl::string_view text, int base,
+ IntType* value_p) {
+ IntType value = 0;
+ const IntType vmin = std::numeric_limits<IntType>::min();
+ assert(vmin < 0);
+ assert(vmin <= 0 - base);
+ IntType vmin_over_base = LookupTables<IntType>::kVminOverBase[base];
+ // 2003 c++ standard [expr.mul]
+ // "... the sign of the remainder is implementation-defined."
+ // Although (vmin/base)*base + vmin%base is always vmin.
+ // 2011 c++ standard tightens the spec but we cannot rely on it.
+ // TODO(junyer): Handle this in the lookup table generation.
+ if (vmin % base > 0) {
+ vmin_over_base += 1;
+ }
+ const char* start = text.data();
+ const char* end = start + text.size();
+ // loop over digits
+ for (; start < end; ++start) {
+ unsigned char c = static_cast<unsigned char>(start[0]);
+ int digit = kAsciiToInt[c];
+ if (digit >= base) {
+ *value_p = value;
+ return false;
+ }
+ if (value < vmin_over_base) {
+ *value_p = vmin;
+ return false;
+ }
+ value *= base;
+ if (value < vmin + digit) {
+ *value_p = vmin;
+ return false;
+ }
+ value -= digit;
+ }
+ *value_p = value;
+ return true;
+}
+
+// Input format based on POSIX.1-2008 strtol
+// http://pubs.opengroup.org/onlinepubs/9699919799/functions/strtol.html
+template <typename IntType>
+inline bool safe_int_internal(absl::string_view text, IntType* value_p,
+ int base) {
+ *value_p = 0;
+ bool negative;
+ if (!safe_parse_sign_and_base(&text, &base, &negative)) {
+ return false;
+ }
+ if (!negative) {
+ return safe_parse_positive_int(text, base, value_p);
+ } else {
+ return safe_parse_negative_int(text, base, value_p);
+ }
+}
+
+template <typename IntType>
+inline bool safe_uint_internal(absl::string_view text, IntType* value_p,
+ int base) {
+ *value_p = 0;
+ bool negative;
+ if (!safe_parse_sign_and_base(&text, &base, &negative) || negative) {
+ return false;
+ }
+ return safe_parse_positive_int(text, base, value_p);
+}
+} // anonymous namespace
+
+namespace numbers_internal {
+bool safe_strto32_base(absl::string_view text, int32_t* value, int base) {
+ return safe_int_internal<int32_t>(text, value, base);
+}
+
+bool safe_strto64_base(absl::string_view text, int64_t* value, int base) {
+ return safe_int_internal<int64_t>(text, value, base);
+}
+
+bool safe_strtou32_base(absl::string_view text, uint32_t* value, int base) {
+ return safe_uint_internal<uint32_t>(text, value, base);
+}
+
+bool safe_strtou64_base(absl::string_view text, uint64_t* value, int base) {
+ return safe_uint_internal<uint64_t>(text, value, base);
+}
+} // namespace numbers_internal
+
+} // namespace absl
http://git-wip-us.apache.org/repos/asf/marmotta/blob/0eb556da/libraries/ostrich/backend/3rdparty/abseil/absl/strings/numbers.h
----------------------------------------------------------------------
diff --git a/libraries/ostrich/backend/3rdparty/abseil/absl/strings/numbers.h b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/numbers.h
new file mode 100644
index 0000000..adf706a
--- /dev/null
+++ b/libraries/ostrich/backend/3rdparty/abseil/absl/strings/numbers.h
@@ -0,0 +1,172 @@
+//
+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: numbers.h
+// -----------------------------------------------------------------------------
+//
+// This package contains functions for converting strings to numbers. For
+// converting numbers to strings, use `StrCat()` or `StrAppend()` in str_cat.h,
+// which automatically detect and convert most number values appropriately.
+
+#ifndef ABSL_STRINGS_NUMBERS_H_
+#define ABSL_STRINGS_NUMBERS_H_
+
+#include <cstddef>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <limits>
+#include <string>
+#include <type_traits>
+
+#include "absl/base/macros.h"
+#include "absl/base/port.h"
+#include "absl/numeric/int128.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+
+// SimpleAtoi()
+//
+// Converts the given std::string into an integer value, returning `true` if
+// successful. The std::string must reflect a base-10 integer (optionally followed or
+// preceded by ASCII whitespace) whose value falls within the range of the
+// integer type,
+template <typename int_type>
+ABSL_MUST_USE_RESULT bool SimpleAtoi(absl::string_view s, int_type* out);
+
+// SimpleAtof()
+//
+// Converts the given std::string (optionally followed or preceded by ASCII
+// whitespace) into a float, which may be rounded on overflow or underflow.
+ABSL_MUST_USE_RESULT bool SimpleAtof(absl::string_view str, float* value);
+
+// SimpleAtod()
+//
+// Converts the given std::string (optionally followed or preceded by ASCII
+// whitespace) into a double, which may be rounded on overflow or underflow.
+ABSL_MUST_USE_RESULT bool SimpleAtod(absl::string_view str, double* value);
+
+// SimpleAtob()
+//
+// Converts the given std::string into a boolean, returning `true` if successful.
+// The following case-insensitive strings are interpreted as boolean `true`:
+// "true", "t", "yes", "y", "1". The following case-insensitive strings
+// are interpreted as boolean `false`: "false", "f", "no", "n", "0".
+ABSL_MUST_USE_RESULT bool SimpleAtob(absl::string_view str, bool* value);
+
+} // namespace absl
+
+// End of public API. Implementation details follow.
+
+namespace absl {
+namespace numbers_internal {
+
+// safe_strto?() functions for implementing SimpleAtoi()
+bool safe_strto32_base(absl::string_view text, int32_t* value, int base);
+bool safe_strto64_base(absl::string_view text, int64_t* value, int base);
+bool safe_strtou32_base(absl::string_view text, uint32_t* value, int base);
+bool safe_strtou64_base(absl::string_view text, uint64_t* value, int base);
+
+static const int kFastToBufferSize = 32;
+static const int kSixDigitsToBufferSize = 16;
+
+// Helper function for fast formatting of floating-point values.
+// The result is the same as printf's "%g", a.k.a. "%.6g"; that is, six
+// significant digits are returned, trailing zeros are removed, and numbers
+// outside the range 0.0001-999999 are output using scientific notation
+// (1.23456e+06). This routine is heavily optimized.
+// Required buffer size is `kSixDigitsToBufferSize`.
+size_t SixDigitsToBuffer(double d, char* buffer);
+
+// These functions are intended for speed. All functions take an output buffer
+// as an argument and return a pointer to the last byte they wrote, which is the
+// terminating '\0'. At most `kFastToBufferSize` bytes are written.
+char* FastIntToBuffer(int32_t, char*);
+char* FastIntToBuffer(uint32_t, char*);
+char* FastIntToBuffer(int64_t, char*);
+char* FastIntToBuffer(uint64_t, char*);
+
+// For enums and integer types that are not an exact match for the types above,
+// use templates to call the appropriate one of the four overloads above.
+template <typename int_type>
+char* FastIntToBuffer(int_type i, char* buffer) {
+ static_assert(sizeof(i) <= 64 / 8,
+ "FastIntToBuffer works only with 64-bit-or-less integers.");
+ // TODO(jorg): This signed-ness check is used because it works correctly
+ // with enums, and it also serves to check that int_type is not a pointer.
+ // If one day something like std::is_signed<enum E> works, switch to it.
+ if (static_cast<int_type>(1) - 2 < 0) { // Signed
+ if (sizeof(i) > 32 / 8) { // 33-bit to 64-bit
+ return FastIntToBuffer(static_cast<int64_t>(i), buffer);
+ } else { // 32-bit or less
+ return FastIntToBuffer(static_cast<int32_t>(i), buffer);
+ }
+ } else { // Unsigned
+ if (sizeof(i) > 32 / 8) { // 33-bit to 64-bit
+ return FastIntToBuffer(static_cast<uint64_t>(i), buffer);
+ } else { // 32-bit or less
+ return FastIntToBuffer(static_cast<uint32_t>(i), buffer);
+ }
+ }
+}
+
+} // namespace numbers_internal
+
+// SimpleAtoi()
+//
+// Converts a std::string to an integer, using `safe_strto?()` functions for actual
+// parsing, returning `true` if successful. The `safe_strto?()` functions apply
+// strict checking; the std::string must be a base-10 integer, optionally followed or
+// preceded by ASCII whitespace, with a value in the range of the corresponding
+// integer type.
+template <typename int_type>
+ABSL_MUST_USE_RESULT bool SimpleAtoi(absl::string_view s, int_type* out) {
+ static_assert(sizeof(*out) == 4 || sizeof(*out) == 8,
+ "SimpleAtoi works only with 32-bit or 64-bit integers.");
+ static_assert(!std::is_floating_point<int_type>::value,
+ "Use SimpleAtof or SimpleAtod instead.");
+ bool parsed;
+ // TODO(jorg): This signed-ness check is used because it works correctly
+ // with enums, and it also serves to check that int_type is not a pointer.
+ // If one day something like std::is_signed<enum E> works, switch to it.
+ if (static_cast<int_type>(1) - 2 < 0) { // Signed
+ if (sizeof(*out) == 64 / 8) { // 64-bit
+ int64_t val;
+ parsed = numbers_internal::safe_strto64_base(s, &val, 10);
+ *out = static_cast<int_type>(val);
+ } else { // 32-bit
+ int32_t val;
+ parsed = numbers_internal::safe_strto32_base(s, &val, 10);
+ *out = static_cast<int_type>(val);
+ }
+ } else { // Unsigned
+ if (sizeof(*out) == 64 / 8) { // 64-bit
+ uint64_t val;
+ parsed = numbers_internal::safe_strtou64_base(s, &val, 10);
+ *out = static_cast<int_type>(val);
+ } else { // 32-bit
+ uint32_t val;
+ parsed = numbers_internal::safe_strtou32_base(s, &val, 10);
+ *out = static_cast<int_type>(val);
+ }
+ }
+ return parsed;
+}
+
+} // namespace absl
+
+#endif // ABSL_STRINGS_NUMBERS_H_