Certificate path builder for new certificate verification library

net/der/input.cc

 // Copyright 2015 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.
 
 #include <string.h>
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "net/der/input.h"
 
 namespace net {
 
 namespace der {
 
 Input::Input() : data_(nullptr), len_(0) {
 }
 
+Input::Input(const Input& other, const Input& old_base, const Input& new_base)
+    : data_(other.data_ ? new_base.data_ + (other.data_ - old_base.data_)
+                        : nullptr),
+      len_(other.len_) {
+  if (other.data_) {
+    DCHECK_EQ(new_base.len_, old_base.len_);
+    DCHECK_GE(data_, new_base.data_);
+    DCHECK_LE(data_ + len_, new_base.data_ + new_base.len_);
+  }
+  DCHECK(*this == other);
+}
+
 Input::Input(const uint8_t* data, size_t len) : data_(data), len_(len) {
 }
 
 Input::Input(const base::StringPiece& in)
     : data_(reinterpret_cast<const uint8_t*>(in.data())), len_(in.length()) {}
 
 Input::Input(const std::string* s) : Input(base::StringPiece(*s)) {}
 
 std::string Input::AsString() const {
   return std::string(reinterpret_cast<const char*>(data_), len_);
@@ skipping 83 matching lines @@
 
 Mark::Mark(const uint8_t* ptr) : ptr_(ptr) {
 }
 
 Mark::Mark() : ptr_(nullptr) {
 }
 
 }  // namespace der
 
 }  // namespace net