Replace RE2 import with a dependency

third_party/re2/re2/stringpiece.h

Index: third_party/re2/re2/stringpiece.h
diff --git a/third_party/re2/re2/stringpiece.h b/third_party/re2/re2/stringpiece.h
deleted file mode 100644
index 1479d1ac6137d13396507fa2c9bd768b2a79af96..0000000000000000000000000000000000000000
--- a/third_party/re2/re2/stringpiece.h
+++ /dev/null
@@ -1,185 +0,0 @@
-// Copyright 2001-2010 The RE2 Authors.  All Rights Reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// A string-like object that points to a sized piece of memory.
-//
-// Functions or methods may use const StringPiece& parameters to accept either
-// a "const char*" or a "string" value that will be implicitly converted to
-// a StringPiece.  The implicit conversion means that it is often appropriate
-// to include this .h file in other files rather than forward-declaring
-// StringPiece as would be appropriate for most other Google classes.
-//
-// Systematic usage of StringPiece is encouraged as it will reduce unnecessary
-// conversions from "const char*" to "string" and back again.
-//
-//
-// Arghh!  I wish C++ literals were "string".
-
-#ifndef STRINGS_STRINGPIECE_H__
-#define STRINGS_STRINGPIECE_H__
-
-#include <string.h>
-#include <algorithm>
-#include <cstddef>
-#include <iosfwd>
-#include <string>
-
-namespace re2 {
-
-class StringPiece {
- private:
-  const char*   ptr_;
-  int           length_;
-
- public:
-  // We provide non-explicit singleton constructors so users can pass
-  // in a "const char*" or a "string" wherever a "StringPiece" is
-  // expected.
-  StringPiece() : ptr_(NULL), length_(0) { }
-  StringPiece(const char* str)
-    : ptr_(str), length_((str == NULL) ? 0 : static_cast<int>(strlen(str))) { }
-  StringPiece(const std::string& str)
-    : ptr_(str.data()), length_(static_cast<int>(str.size())) { }
-  StringPiece(const char* offset, int len) : ptr_(offset), length_(len) { }
-
-  // data() may return a pointer to a buffer with embedded NULs, and the
-  // returned buffer may or may not be null terminated.  Therefore it is
-  // typically a mistake to pass data() to a routine that expects a NUL
-  // terminated string.
-  const char* data() const { return ptr_; }
-  int size() const { return length_; }
-  int length() const { return length_; }
-  bool empty() const { return length_ == 0; }
-
-  void clear() { ptr_ = NULL; length_ = 0; }
-  void set(const char* data, int len) { ptr_ = data; length_ = len; }
-  void set(const char* str) {
-    ptr_ = str;
-    if (str != NULL)
-      length_ = static_cast<int>(strlen(str));
-    else
-      length_ = 0;
-  }
-  void set(const void* data, int len) {
-    ptr_ = reinterpret_cast<const char*>(data);
-    length_ = len;
-  }
-
-  char operator[](int i) const { return ptr_[i]; }
-
-  void remove_prefix(int n) {
-    ptr_ += n;
-    length_ -= n;
-  }
-
-  void remove_suffix(int n) {
-    length_ -= n;
-  }
-
-  int compare(const StringPiece& x) const {
-    int r = memcmp(ptr_, x.ptr_, std::min(length_, x.length_));
-    if (r == 0) {
-      if (length_ < x.length_) r = -1;
-      else if (length_ > x.length_) r = +1;
-    }
-    return r;
-  }
-
-  std::string as_string() const {
-    return std::string(data(), size());
-  }
-  // We also define ToString() here, since many other string-like
-  // interfaces name the routine that converts to a C++ string
-  // "ToString", and it's confusing to have the method that does that
-  // for a StringPiece be called "as_string()".  We also leave the
-  // "as_string()" method defined here for existing code.
-  std::string ToString() const {
-    return std::string(data(), size());
-  }
-
-  void CopyToString(std::string* target) const;
-  void AppendToString(std::string* target) const;
-
-  // Does "this" start with "x"
-  bool starts_with(const StringPiece& x) const {
-    return ((length_ >= x.length_) &&
-            (memcmp(ptr_, x.ptr_, x.length_) == 0));
-  }
-
-  // Does "this" end with "x"
-  bool ends_with(const StringPiece& x) const {
-    return ((length_ >= x.length_) &&
-            (memcmp(ptr_ + (length_-x.length_), x.ptr_, x.length_) == 0));
-  }
-
-  // standard STL container boilerplate
-  typedef char value_type;
-  typedef const char* pointer;
-  typedef const char& reference;
-  typedef const char& const_reference;
-  typedef size_t size_type;
-  typedef ptrdiff_t difference_type;
-  static const size_type npos;
-  typedef const char* const_iterator;
-  typedef const char* iterator;
-  typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
-  typedef std::reverse_iterator<iterator> reverse_iterator;
-  iterator begin() const { return ptr_; }
-  iterator end() const { return ptr_ + length_; }
-  const_reverse_iterator rbegin() const {
-    return const_reverse_iterator(ptr_ + length_);
-  }
-  const_reverse_iterator rend() const {
-    return const_reverse_iterator(ptr_);
-  }
-  // STLS says return size_type, but Google says return int
-  int max_size() const { return length_; }
-  int capacity() const { return length_; }
-
-  size_type copy(char* buf, size_type n, size_type pos = 0) const;
-
-  bool contains(StringPiece s) const;
-
-  size_type find(const StringPiece& s, size_type pos = 0) const;
-  size_type find(char c, size_type pos = 0) const;
-  size_type rfind(const StringPiece& s, size_type pos = npos) const;
-  size_type rfind(char c, size_type pos = npos) const;
-
-  StringPiece substr(size_type pos, size_type n = npos) const;
-
-  static bool _equal(const StringPiece&, const StringPiece&);
-};
-
-inline bool operator==(const StringPiece& x, const StringPiece& y) {
-  return StringPiece::_equal(x, y);
-}
-
-inline bool operator!=(const StringPiece& x, const StringPiece& y) {
-  return !(x == y);
-}
-
-inline bool operator<(const StringPiece& x, const StringPiece& y) {
-  const int r = memcmp(x.data(), y.data(),
-                       std::min(x.size(), y.size()));
-  return ((r < 0) || ((r == 0) && (x.size() < y.size())));
-}
-
-inline bool operator>(const StringPiece& x, const StringPiece& y) {
-  return y < x;
-}
-
-inline bool operator<=(const StringPiece& x, const StringPiece& y) {
-  return !(x > y);
-}
-
-inline bool operator>=(const StringPiece& x, const StringPiece& y) {
-  return !(x < y);
-}
-
-}  // namespace re2
-
-// allow StringPiece to be logged
-extern std::ostream& operator<<(std::ostream& o, const re2::StringPiece& piece);
-
-#endif  // STRINGS_STRINGPIECE_H__