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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
-//
-//      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.
-//
-// -----------------------------------------------------------------------------
-// File: ascii.h
-// -----------------------------------------------------------------------------
-//
-// This package contains functions operating on characters and strings
-// restricted to standard ASCII. These include character classification
-// functions analogous to those found in the ANSI C Standard Library <ctype.h>
-// header file.
-//
-// C++ implementations provide <ctype.h> functionality based on their
-// C environment locale. In general, reliance on such a locale is not ideal, as
-// the locale standard is problematic (and may not return invariant information
-// for the same character set, for example). These `ascii_*()` functions are
-// hard-wired for standard ASCII, much faster, and guaranteed to behave
-// consistently.  They will never be overloaded, nor will their function
-// signature change.
-//
-// `ascii_isalnum()`, `ascii_isalpha()`, `ascii_isascii()`, `ascii_isblank()`,
-// `ascii_iscntrl()`, `ascii_isdigit()`, `ascii_isgraph()`, `ascii_islower()`,
-// `ascii_isprint()`, `ascii_ispunct()`, `ascii_isspace()`, `ascii_isupper()`,
-// `ascii_isxdigit()`
-//   Analogous to the <ctype.h> functions with similar names, these
-//   functions take an unsigned char and return a bool, based on whether the
-//   character matches the condition specified.
-//
-//   If the input character has a numerical value greater than 127, these
-//   functions return `false`.
-//
-// `ascii_tolower()`, `ascii_toupper()`
-//   Analogous to the <ctype.h> functions with similar names, these functions
-//   take an unsigned char and return a char.
-//
-//   If the input character is not an ASCII {lower,upper}-case letter (including
-//   numerical values greater than 127) then the functions return the same value
-//   as the input character.
-
-#ifndef ABSL_STRINGS_ASCII_H_
-#define ABSL_STRINGS_ASCII_H_
-
-#include <algorithm>
-#include <string>
-
-#include "absl/base/attributes.h"
-#include "absl/base/config.h"
-#include "absl/strings/string_view.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace ascii_internal {
-
-// Declaration for an array of bitfields holding character information.
-ABSL_DLL extern const unsigned char kPropertyBits[256];
-
-// Declaration for the array of characters to upper-case characters.
-ABSL_DLL extern const char kToUpper[256];
-
-// Declaration for the array of characters to lower-case characters.
-ABSL_DLL extern const char kToLower[256];
-
-}  // namespace ascii_internal
-
-// ascii_isalpha()
-//
-// Determines whether the given character is an alphabetic character.
-inline bool ascii_isalpha(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x01) != 0;
-}
-
-// ascii_isalnum()
-//
-// Determines whether the given character is an alphanumeric character.
-inline bool ascii_isalnum(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x04) != 0;
-}
-
-// ascii_isspace()
-//
-// Determines whether the given character is a whitespace character (space,
-// tab, vertical tab, formfeed, linefeed, or carriage return).
-inline bool ascii_isspace(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x08) != 0;
-}
-
-// ascii_ispunct()
-//
-// Determines whether the given character is a punctuation character.
-inline bool ascii_ispunct(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x10) != 0;
-}
-
-// ascii_isblank()
-//
-// Determines whether the given character is a blank character (tab or space).
-inline bool ascii_isblank(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x20) != 0;
-}
-
-// ascii_iscntrl()
-//
-// Determines whether the given character is a control character.
-inline bool ascii_iscntrl(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x40) != 0;
-}
-
-// ascii_isxdigit()
-//
-// Determines whether the given character can be represented as a hexadecimal
-// digit character (i.e. {0-9} or {A-F}).
-inline bool ascii_isxdigit(unsigned char c) {
-  return (ascii_internal::kPropertyBits[c] & 0x80) != 0;
-}
-
-// ascii_isdigit()
-//
-// Determines whether the given character can be represented as a decimal
-// digit character (i.e. {0-9}).
-inline bool ascii_isdigit(unsigned char c) { return c >= '0' && c <= '9'; }
-
-// ascii_isprint()
-//
-// Determines whether the given character is printable, including whitespace.
-inline bool ascii_isprint(unsigned char c) { return c >= 32 && c < 127; }
-
-// ascii_isgraph()
-//
-// Determines whether the given character has a graphical representation.
-inline bool ascii_isgraph(unsigned char c) { return c > 32 && c < 127; }
-
-// ascii_isupper()
-//
-// Determines whether the given character is uppercase.
-inline bool ascii_isupper(unsigned char c) { return c >= 'A' && c <= 'Z'; }
-
-// ascii_islower()
-//
-// Determines whether the given character is lowercase.
-inline bool ascii_islower(unsigned char c) { return c >= 'a' && c <= 'z'; }
-
-// ascii_isascii()
-//
-// Determines whether the given character is ASCII.
-inline bool ascii_isascii(unsigned char c) { return c < 128; }
-
-// ascii_tolower()
-//
-// Returns an ASCII character, converting to lowercase if uppercase is
-// passed. Note that character values > 127 are simply returned.
-inline char ascii_tolower(unsigned char c) {
-  return ascii_internal::kToLower[c];
-}
-
-// Converts the characters in `s` to lowercase, changing the contents of `s`.
-void AsciiStrToLower(std::string* s);
-
-// Creates a lowercase string from a given absl::string_view.
-ABSL_MUST_USE_RESULT inline std::string AsciiStrToLower(absl::string_view s) {
-  std::string result(s);
-  absl::AsciiStrToLower(&result);
-  return result;
-}
-
-// ascii_toupper()
-//
-// Returns the ASCII character, converting to upper-case if lower-case is
-// passed. Note that characters values > 127 are simply returned.
-inline char ascii_toupper(unsigned char c) {
-  return ascii_internal::kToUpper[c];
-}
-
-// Converts the characters in `s` to uppercase, changing the contents of `s`.
-void AsciiStrToUpper(std::string* s);
-
-// Creates an uppercase string from a given absl::string_view.
-ABSL_MUST_USE_RESULT inline std::string AsciiStrToUpper(absl::string_view s) {
-  std::string result(s);
-  absl::AsciiStrToUpper(&result);
-  return result;
-}
-
-// Returns absl::string_view with whitespace stripped from the beginning of the
-// given string_view.
-ABSL_MUST_USE_RESULT inline absl::string_view StripLeadingAsciiWhitespace(
-    absl::string_view str) {
-  auto it = std::find_if_not(str.begin(), str.end(), absl::ascii_isspace);
-  return str.substr(it - str.begin());
-}
-
-// Strips in place whitespace from the beginning of the given string.
-inline void StripLeadingAsciiWhitespace(std::string* str) {
-  auto it = std::find_if_not(str->begin(), str->end(), absl::ascii_isspace);
-  str->erase(str->begin(), it);
-}
-
-// Returns absl::string_view with whitespace stripped from the end of the given
-// string_view.
-ABSL_MUST_USE_RESULT inline absl::string_view StripTrailingAsciiWhitespace(
-    absl::string_view str) {
-  auto it = std::find_if_not(str.rbegin(), str.rend(), absl::ascii_isspace);
-  return str.substr(0, str.rend() - it);
-}
-
-// Strips in place whitespace from the end of the given string
-inline void StripTrailingAsciiWhitespace(std::string* str) {
-  auto it = std::find_if_not(str->rbegin(), str->rend(), absl::ascii_isspace);
-  str->erase(str->rend() - it);
-}
-
-// Returns absl::string_view with whitespace stripped from both ends of the
-// given string_view.
-ABSL_MUST_USE_RESULT inline absl::string_view StripAsciiWhitespace(
-    absl::string_view str) {
-  return StripTrailingAsciiWhitespace(StripLeadingAsciiWhitespace(str));
-}
-
-// Strips in place whitespace from both ends of the given string
-inline void StripAsciiWhitespace(std::string* str) {
-  StripTrailingAsciiWhitespace(str);
-  StripLeadingAsciiWhitespace(str);
-}
-
-// Removes leading, trailing, and consecutive internal whitespace.
-void RemoveExtraAsciiWhitespace(std::string*);
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_ASCII_H_