Add MinidumpSimpleStringDictionaryWriter and its test

minidump/minidump_simple_string_dictionary_writer.cc

Index: minidump/minidump_simple_string_dictionary_writer.cc
diff --git a/minidump/minidump_simple_string_dictionary_writer.cc b/minidump/minidump_simple_string_dictionary_writer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d9a5c919f1e3f985a001ebc9d2a6036fc06d455d
--- /dev/null
+++ b/minidump/minidump_simple_string_dictionary_writer.cc
@@ -0,0 +1,158 @@
+// 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_simple_string_dictionary_writer.h"
+
+#include "base/logging.h"
+#include "util/numeric/safe_assignment.h"
+
+namespace crashpad {
+
+MinidumpSimpleStringDictionaryEntryWriter::
+    MinidumpSimpleStringDictionaryEntryWriter()
+    : MinidumpWritable(), entry_(), key_(), value_() {
+}
+
+MinidumpSimpleStringDictionaryEntryWriter::
+    ~MinidumpSimpleStringDictionaryEntryWriter() {
+}
+
+const MinidumpSimpleStringDictionaryEntry*
+MinidumpSimpleStringDictionaryEntryWriter::MinidumpSimpleStringDictionaryEntry()
+    const {
+  DCHECK_EQ(state(), kStateWritable);
+
+  return &entry_;
+}
+
+void MinidumpSimpleStringDictionaryEntryWriter::SetKeyValue(
+    const std::string& key,
+    const std::string& value) {
+  key_.SetUTF8(key);
+  value_.SetUTF8(value);
+}
+
+bool MinidumpSimpleStringDictionaryEntryWriter::Freeze() {
+  DCHECK_EQ(state(), kStateMutable);
+
+  if (!MinidumpWritable::Freeze()) {
+    return false;
+  }
+
+  key_.RegisterRVA(&entry_.key);
+  value_.RegisterRVA(&entry_.value);
+
+  return true;
+}
+
+size_t MinidumpSimpleStringDictionaryEntryWriter::SizeOfObject() {
+  DCHECK_GE(state(), kStateFrozen);
+
+  // This object doesn’t directly write anything itself. Its
+  // MinidumpSimpleStringDictionaryEntry is written by its parent as part of a
+  // MinidumpSimpleStringDictionary, and its children are responsible for
+  // writing themselves.
+  return 0;
+}
+
+std::vector<internal::MinidumpWritable*>
+MinidumpSimpleStringDictionaryEntryWriter::Children() {
+  DCHECK_GE(state(), kStateFrozen);
+
+  std::vector<MinidumpWritable*> children(1, &key_);
+  children.push_back(&value_);
+  return children;
+}
+
+bool MinidumpSimpleStringDictionaryEntryWriter::WriteObject(
+    FileWriterInterface* file_writer) {
+  DCHECK_EQ(state(), kStateWritable);
+
+  // This object doesn’t directly write anything itself. Its
+  // MinidumpSimpleStringDictionaryEntry is written by its parent as part of a
+  // MinidumpSimpleStringDictionary, and its children are responsible for
+  // writing themselves.
+  return true;
+}
+
+MinidumpSimpleStringDictionaryWriter::MinidumpSimpleStringDictionaryWriter()
+    : MinidumpWritable(), simple_string_dictionary_base_(), entries_() {
+}
+
+MinidumpSimpleStringDictionaryWriter::~MinidumpSimpleStringDictionaryWriter() {
+}
+
+void MinidumpSimpleStringDictionaryWriter::AddEntry(
+    MinidumpSimpleStringDictionaryEntryWriter* entry) {
+  DCHECK_GE(state(), kStateMutable);
+
+  entries_[entry->Key()] = entry;
+}
+
+bool MinidumpSimpleStringDictionaryWriter::Freeze() {
+  DCHECK_EQ(state(), kStateMutable);
+
+  if (!MinidumpWritable::Freeze()) {
+    return false;
+  }
+
+  size_t entry_count = entries_.size();
+  if (!AssignIfInRange(&simple_string_dictionary_base_.count, entry_count)) {
+    LOG(ERROR) << "entry_count " << entry_count << " out of range";
+    return false;
+  }
+
+  return true;
+}
+
+size_t MinidumpSimpleStringDictionaryWriter::SizeOfObject() {
+  DCHECK_GE(state(), kStateFrozen);
+
+  return sizeof(simple_string_dictionary_base_) +
+         entries_.size() * sizeof(MinidumpSimpleStringDictionaryEntry);
+}
+
+std::vector<internal::MinidumpWritable*>
+MinidumpSimpleStringDictionaryWriter::Children() {
+  DCHECK_GE(state(), kStateMutable);
+
+  std::vector<MinidumpWritable*> children;
+  for (const auto& key_entry : entries_) {
+    children.push_back(key_entry.second);
+  }
+
+  return children;
+}
+
+bool MinidumpSimpleStringDictionaryWriter::WriteObject(
+    FileWriterInterface* file_writer) {
+  DCHECK_GE(state(), kStateWritable);
+
+  WritableIoVec iov;
+  iov.iov_base = &simple_string_dictionary_base_;
+  iov.iov_len = sizeof(simple_string_dictionary_base_);
+  std::vector<WritableIoVec> iovecs(1, iov);
+
+  if (!entries_.empty()) {
+    iov.iov_len = sizeof(MinidumpSimpleStringDictionaryEntry);
+    for (const auto& key_entry : entries_) {
+      iov.iov_base = key_entry.second->MinidumpSimpleStringDictionaryEntry();
+      iovecs.push_back(iov);
+    }
+  }
+
+  return file_writer->WriteIoVec(&iovecs);
+}
+
+}  // namespace crashpad