Add MinidumpRVAListWriter and test

minidump/minidump_rva_list_writer.cc

Index: minidump/minidump_rva_list_writer.cc
diff --git a/minidump/minidump_rva_list_writer.cc b/minidump/minidump_rva_list_writer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..af4f5824069d69b7b480d75cb7c2b91122f1ca12
--- /dev/null
+++ b/minidump/minidump_rva_list_writer.cc
@@ -0,0 +1,97 @@
+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "minidump/minidump_rva_list_writer.h"
+
+#include "base/logging.h"
+#include "util/file/file_writer.h"
+#include "util/numeric/safe_assignment.h"
+
+namespace crashpad {
+
+MinidumpRVAListWriter::MinidumpRVAListWriter()
+    : MinidumpWritable(),
+      rva_list_base_(),
+      children_(),
+      child_rvas_() {
+}
+
+MinidumpRVAListWriter::~MinidumpRVAListWriter() {
+}
+
+void MinidumpRVAListWriter::AddChild(
+    scoped_ptr<internal::MinidumpWritable> child) {
+  DCHECK_EQ(state(), kStateMutable);
+
+  children_.push_back(child.release());
+}
+
+bool MinidumpRVAListWriter::Freeze() {
+  DCHECK_EQ(state(), kStateMutable);
+  DCHECK(child_rvas_.empty());
+
+  if (!MinidumpWritable::Freeze()) {
+    return false;
+  }
+
+  size_t child_count = children_.size();
+  if (!AssignIfInRange(&rva_list_base_.count, child_count)) {
+    LOG(ERROR) << "child_count " << child_count << " out of range";
+    return false;
+  }
+
+  child_rvas_.resize(child_count);
+  for (size_t index = 0; index < child_count; ++index) {
+    children_[index]->RegisterRVA(&child_rvas_[index]);
+  }
+
+  return true;
+}
+
+size_t MinidumpRVAListWriter::SizeOfObject() {
+  DCHECK_GE(state(), kStateFrozen);
+
+  return sizeof(rva_list_base_) + children_.size() * sizeof(RVA);
+}
+
+std::vector<internal::MinidumpWritable*> MinidumpRVAListWriter::Children() {
+  DCHECK_GE(state(), kStateFrozen);
+
+  std::vector<MinidumpWritable*> children;
+  for (MinidumpWritable* child : children_) {
+    children.push_back(child);
+  }
+
+  return children;
+}
+
+bool MinidumpRVAListWriter::WriteObject(FileWriterInterface* file_writer) {
+  DCHECK_EQ(state(), kStateWritable);
+  DCHECK_EQ(children_.size(), child_rvas_.size());
+
+  WritableIoVec iov;
+  iov.iov_base = &rva_list_base_;
+  iov.iov_len = sizeof(rva_list_base_);
+  std::vector<WritableIoVec> iovecs(1, iov);
+
+  if (!child_rvas_.empty()) {
+    iov.iov_base = &child_rvas_[0];
+    iov.iov_len = child_rvas_.size() * sizeof(RVA);
+    iovecs.push_back(iov);
+  }
+
+  return file_writer->WriteIoVec(&iovecs);
+}
+
+}  // namespace crashpad