The Tor Browser: ipc/chromium/src/base/string_piece.h@6474c204b198 (annotated)

ipc/chromium/src/base/string_piece.h@6474c204b198 (annotated)

ipc/chromium/src/base/string_piece.h

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 // 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) { }
   StringPiece(const char* str)
     : ptr_(str), length_((str == NULL) ? 0 : strlen(str)) { }
   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* data, size_type len) { ptr_ = data; length_ = len; }
   void set(const char* str) {
     ptr_ = str;
     length_ = str ? strlen(str) : 0;
   }
   void set(const void* data, size_type len) {
     ptr_ = reinterpret_cast<const char*>(data);
     length_ = len;
   }
   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_

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ipc/chromium/src/base/string_piece.h@6474c204b198 (annotated)

ipc/chromium/src/base/string_piece.h