1 files changed, 189 insertions, 0 deletions
diff --git a/ipc/chromium/src/base/string_piece.h b/ipc/chromium/src/base/string_piece.h
new file mode 100644
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+++ b/ipc/chromium/src/base/string_piece.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+// Copied from strings/stringpiece.h with modifications
+//
+// 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.
+//
+
+#ifndef BASE_STRING_PIECE_H_
+#define BASE_STRING_PIECE_H_
+
+#include <algorithm>
+#include <iosfwd>
+#include <string>
+
+#include "base/basictypes.h"
+
+class StringPiece {
+ public:
+  typedef size_t size_type;
+
+ private:
+  const char* ptr_;
+  size_type 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) {}
+  MOZ_IMPLICIT StringPiece(const char* str)
+      : ptr_(str), length_((str == NULL) ? 0 : strlen(str)) {}
+  MOZ_IMPLICIT StringPiece(const std::string& str)
+      : ptr_(str.data()), length_(str.size()) {}
+  StringPiece(const char* offset, size_type 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_; }
+  size_type size() const { return length_; }
+  size_type length() const { return length_; }
+  bool empty() const { return length_ == 0; }
+
+  void clear() {
+    ptr_ = NULL;
+    length_ = 0;
+  }
+  void set(const char* aData, size_type aLen) {
+    ptr_ = aData;
+    length_ = aLen;
+  }
+  void set(const char* str) {
+    ptr_ = str;
+    length_ = str ? strlen(str) : 0;
+  }
+  void set(const void* aData, size_type aLen) {
+    ptr_ = reinterpret_cast<const char*>(aData);
+    length_ = aLen;
+  }
+
+  char operator[](size_type i) const { return ptr_[i]; }
+
+  void remove_prefix(size_type n) {
+    ptr_ += n;
+    length_ -= n;
+  }
+
+  void remove_suffix(size_type n) { length_ -= n; }
+
+  int compare(const StringPiece& x) const {
+    int r = wordmemcmp(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 {
+    // std::string doesn't like to take a NULL pointer even with a 0 size.
+    return std::string(!empty() ? 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_) &&
+            (wordmemcmp(ptr_, x.ptr_, x.length_) == 0));
+  }
+
+  // Does "this" end with "x"
+  bool ends_with(const StringPiece& x) const {
+    return ((length_ >= x.length_) &&
+            (wordmemcmp(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 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_); }
+
+  size_type max_size() const { return length_; }
+  size_type capacity() const { return length_; }
+
+  size_type copy(char* buf, size_type n, size_type pos = 0) 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;
+
+  size_type find_first_of(const StringPiece& s, size_type pos = 0) const;
+  size_type find_first_of(char c, size_type pos = 0) const {
+    return find(c, pos);
+  }
+  size_type find_first_not_of(const StringPiece& s, size_type pos = 0) const;
+  size_type find_first_not_of(char c, size_type pos = 0) const;
+  size_type find_last_of(const StringPiece& s, size_type pos = npos) const;
+  size_type find_last_of(char c, size_type pos = npos) const {
+    return rfind(c, pos);
+  }
+  size_type find_last_not_of(const StringPiece& s, size_type pos = npos) const;
+  size_type find_last_not_of(char c, size_type pos = npos) const;
+
+  StringPiece substr(size_type pos, size_type n = npos) const;
+
+  static int wordmemcmp(const char* p, const char* p2, size_type N) {
+    return memcmp(p, p2, N);
+  }
+};
+
+bool operator==(const ::StringPiece& x, const ::StringPiece& 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 = ::StringPiece::wordmemcmp(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);
+}
+
+// allow StringPiece to be logged (needed for unit testing).
+extern std::ostream& operator<<(std::ostream& o, const ::StringPiece& piece);
+
+#endif  // BASE_STRING_PIECE_H_