QUIC - Moved FindOrNull and FindOrDie to a separate files.

net/quic/quic_utils.h

 // Copyright (c) 2012 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.
 //
-// Some helpers for quic
+// Some helpers for quic.
 
 #ifndef NET_QUIC_QUIC_UTILS_H_
 #define NET_QUIC_QUIC_UTILS_H_
 
 #include "net/base/int128.h"
 #include "net/base/net_export.h"
 #include "net/quic/quic_protocol.h"
 
 namespace net {
 
-//
-// Find*()
-//
-
-// Returns a const reference to the value associated with the given key if it
-// exists. Crashes otherwise.
-//
-// This is intended as a replacement for operator[] as an rvalue (for reading)
-// when the key is guaranteed to exist.
-//
-// operator[] for lookup is discouraged for several reasons:
-//  * It has a side-effect of inserting missing keys
-//  * It is not thread-safe (even when it is not inserting, it can still
-//      choose to resize the underlying storage)
-//  * It invalidates iterators (when it chooses to resize)
-//  * It default constructs a value object even if it doesn't need to
-//
-// This version assumes the key is printable, and includes it in the fatal log
-// message.
-template <class Collection>
-const typename Collection::value_type::second_type&
-FindOrDie(const Collection& collection,
-          const typename Collection::value_type::first_type& key) {
-  typename Collection::const_iterator it = collection.find(key);
-  CHECK(it != collection.end()) << "Map key not found: " << key;
-  return it->second;
-}
-
-// Same as above, but returns a non-const reference.
-template <class Collection>
-typename Collection::value_type::second_type&
-FindOrDie(Collection& collection,  // NOLINT
-          const typename Collection::value_type::first_type& key) {
-  typename Collection::iterator it = collection.find(key);
-  CHECK(it != collection.end()) << "Map key not found: " << key;
-  return it->second;
-}
-
-// Returns a pointer to the const value associated with the given key if it
-// exists, or NULL otherwise.
-template <class Collection>
-const typename Collection::value_type::second_type*
-FindOrNull(const Collection& collection,
-           const typename Collection::value_type::first_type& key) {
-  typename Collection::const_iterator it = collection.find(key);
-  if (it == collection.end()) {
-    return 0;
-  }
-  return &it->second;
-}
-
-// Same as above but returns a pointer to the non-const value.
-template <class Collection>
-typename Collection::value_type::second_type*
-FindOrNull(Collection& collection,  // NOLINT
-           const typename Collection::value_type::first_type& key) {
-  typename Collection::iterator it = collection.find(key);
-  if (it == collection.end()) {
-    return 0;
-  }
-  return &it->second;
-}
-
 class NET_EXPORT_PRIVATE QuicUtils {
  public:
   enum Priority {
     LOCAL_PRIORITY,
     PEER_PRIORITY,
   };
 
-  // returns the 64 bit FNV1a hash of the data.  See
+  // Returns the 64 bit FNV1a hash of the data.  See
   // http://www.isthe.com/chongo/tech/comp/fnv/index.html#FNV-param
   static uint64 FNV1a_64_Hash(const char* data, int len);
 
   // returns the 128 bit FNV1a hash of the data.  See
   // http://www.isthe.com/chongo/tech/comp/fnv/index.html#FNV-param
   static uint128 FNV1a_128_Hash(const char* data, int len);
 
   // FindMutualTag sets |out_result| to the first tag in the priority list that
   // is also in the other list and returns true. If there is no intersection it
   // returns false.
@@ skipping 50 matching lines @@
 // Utility function that returns an IOVector object wrapped around |str|.
 inline IOVector MakeIOVector(base::StringPiece str) {
   IOVector iov;
   iov.Append(const_cast<char*>(str.data()), str.size());
   return iov;
 }
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_UTILS_H_