diff options
Diffstat (limited to 'third_party/abseil_cpp/absl/strings/string_view.cc')
| -rw-r--r-- | third_party/abseil_cpp/absl/strings/string_view.cc | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/third_party/abseil_cpp/absl/strings/string_view.cc b/third_party/abseil_cpp/absl/strings/string_view.cc deleted file mode 100644 index c5f5de936d..0000000000 --- a/third_party/abseil_cpp/absl/strings/string_view.cc +++ /dev/null @@ -1,235 +0,0 @@ -// 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 -// -// https://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/string_view.h" - -#ifndef ABSL_USES_STD_STRING_VIEW - -#include <algorithm> -#include <climits> -#include <cstring> -#include <ostream> - -#include "absl/strings/internal/memutil.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN - -namespace { -void WritePadding(std::ostream& o, size_t pad) { - char fill_buf[32]; - memset(fill_buf, o.fill(), sizeof(fill_buf)); - while (pad) { - size_t n = std::min(pad, sizeof(fill_buf)); - o.write(fill_buf, n); - pad -= n; - } -} - -class LookupTable { - public: - // For each character in wanted, sets the index corresponding - // to the ASCII code of that character. This is used by - // the find_.*_of methods below to tell whether or not a character is in - // the lookup table in constant time. - explicit LookupTable(string_view wanted) { - for (char c : wanted) { - table_[Index(c)] = true; - } - } - bool operator[](char c) const { return table_[Index(c)]; } - - private: - static unsigned char Index(char c) { return static_cast<unsigned char>(c); } - bool table_[UCHAR_MAX + 1] = {}; -}; - -} // namespace - -std::ostream& operator<<(std::ostream& o, string_view piece) { - std::ostream::sentry sentry(o); - if (sentry) { - size_t lpad = 0; - size_t rpad = 0; - if (static_cast<size_t>(o.width()) > piece.size()) { - size_t pad = o.width() - piece.size(); - if ((o.flags() & o.adjustfield) == o.left) { - rpad = pad; - } else { - lpad = pad; - } - } - if (lpad) WritePadding(o, lpad); - o.write(piece.data(), piece.size()); - if (rpad) WritePadding(o, rpad); - o.width(0); - } - return o; -} - -string_view::size_type string_view::find(string_view s, size_type pos) const - noexcept { - if (empty() || pos > length_) { - if (empty() && pos == 0 && s.empty()) return 0; - return npos; - } - const char* result = - strings_internal::memmatch(ptr_ + pos, length_ - pos, s.ptr_, s.length_); - return result ? result - ptr_ : npos; -} - -string_view::size_type string_view::find(char c, size_type pos) const noexcept { - if (empty() || pos >= length_) { - return npos; - } - const char* result = - static_cast<const char*>(memchr(ptr_ + pos, c, length_ - pos)); - return result != nullptr ? result - ptr_ : npos; -} - -string_view::size_type string_view::rfind(string_view s, size_type pos) const - noexcept { - if (length_ < s.length_) return npos; - if (s.empty()) return std::min(length_, pos); - const char* last = ptr_ + std::min(length_ - s.length_, pos) + s.length_; - const char* result = std::find_end(ptr_, last, s.ptr_, s.ptr_ + s.length_); - return result != last ? result - ptr_ : npos; -} - -// Search range is [0..pos] inclusive. If pos == npos, search everything. -string_view::size_type string_view::rfind(char c, size_type pos) const - noexcept { - // Note: memrchr() is not available on Windows. - if (empty()) return npos; - for (size_type i = std::min(pos, length_ - 1);; --i) { - if (ptr_[i] == c) { - return i; - } - if (i == 0) break; - } - return npos; -} - -string_view::size_type string_view::find_first_of(string_view s, - size_type pos) const - noexcept { - if (empty() || s.empty()) { - return npos; - } - // Avoid the cost of LookupTable() for a single-character search. - if (s.length_ == 1) return find_first_of(s.ptr_[0], pos); - LookupTable tbl(s); - for (size_type i = pos; i < length_; ++i) { - if (tbl[ptr_[i]]) { - return i; - } - } - return npos; -} - -string_view::size_type string_view::find_first_not_of(string_view s, - size_type pos) const - noexcept { - if (empty()) return npos; - // Avoid the cost of LookupTable() for a single-character search. - if (s.length_ == 1) return find_first_not_of(s.ptr_[0], pos); - LookupTable tbl(s); - for (size_type i = pos; i < length_; ++i) { - if (!tbl[ptr_[i]]) { - return i; - } - } - return npos; -} - -string_view::size_type string_view::find_first_not_of(char c, - size_type pos) const - noexcept { - if (empty()) return npos; - for (; pos < length_; ++pos) { - if (ptr_[pos] != c) { - return pos; - } - } - return npos; -} - -string_view::size_type string_view::find_last_of(string_view s, - size_type pos) const noexcept { - if (empty() || s.empty()) return npos; - // Avoid the cost of LookupTable() for a single-character search. - if (s.length_ == 1) return find_last_of(s.ptr_[0], pos); - LookupTable tbl(s); - for (size_type i = std::min(pos, length_ - 1);; --i) { - if (tbl[ptr_[i]]) { - return i; - } - if (i == 0) break; - } - return npos; -} - -string_view::size_type string_view::find_last_not_of(string_view s, - size_type pos) const - noexcept { - if (empty()) return npos; - size_type i = std::min(pos, length_ - 1); - if (s.empty()) return i; - // Avoid the cost of LookupTable() for a single-character search. - if (s.length_ == 1) return find_last_not_of(s.ptr_[0], pos); - LookupTable tbl(s); - for (;; --i) { - if (!tbl[ptr_[i]]) { - return i; - } - if (i == 0) break; - } - return npos; -} - -string_view::size_type string_view::find_last_not_of(char c, - size_type pos) const - noexcept { - if (empty()) return npos; - size_type i = std::min(pos, length_ - 1); - for (;; --i) { - if (ptr_[i] != c) { - return i; - } - if (i == 0) break; - } - return npos; -} - -// MSVC has non-standard behavior that implicitly creates definitions for static -// const members. These implicit definitions conflict with explicit out-of-class -// member definitions that are required by the C++ standard, resulting in -// LNK1169 "multiply defined" errors at link time. __declspec(selectany) asks -// MSVC to choose only one definition for the symbol it decorates. See details -// at https://msdn.microsoft.com/en-us/library/34h23df8(v=vs.100).aspx -#ifdef _MSC_VER -#define ABSL_STRING_VIEW_SELECTANY __declspec(selectany) -#else -#define ABSL_STRING_VIEW_SELECTANY -#endif - -ABSL_STRING_VIEW_SELECTANY -constexpr string_view::size_type string_view::npos; -ABSL_STRING_VIEW_SELECTANY -constexpr string_view::size_type string_view::kMaxSize; - -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_USES_STD_STRING_VIEW |