minidump: Add InitializeFromSnapshot() for MinidumpModuleCrashpadInfoListWriter and downstream

minidump/minidump_simple_string_dictionary_writer.cc

 // 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,
@@ skipping 23 matching lines @@
 MinidumpSimpleStringDictionaryEntryWriter::MinidumpSimpleStringDictionaryEntry()
     const {
   DCHECK_EQ(state(), kStateWritable);
 
   return &entry_;
 }
 
 void MinidumpSimpleStringDictionaryEntryWriter::SetKeyValue(
     const std::string& key,
     const std::string& value) {
+  DCHECK_EQ(state(), kStateMutable);
+
   key_.SetUTF8(key);
   value_.SetUTF8(value);
 }
 
 bool MinidumpSimpleStringDictionaryEntryWriter::Freeze() {
   DCHECK_EQ(state(), kStateMutable);
 
   if (!MinidumpWritable::Freeze()) {
     return false;
   }
@@ skipping 35 matching lines @@
 }
 
 MinidumpSimpleStringDictionaryWriter::MinidumpSimpleStringDictionaryWriter()
     : MinidumpWritable(), simple_string_dictionary_base_(), entries_() {
 }
 
 MinidumpSimpleStringDictionaryWriter::~MinidumpSimpleStringDictionaryWriter() {
   STLDeleteContainerPairSecondPointers(entries_.begin(), entries_.end());
 }
 
+void MinidumpSimpleStringDictionaryWriter::InitializeFromMap(
+    const std::map<std::string, std::string>& map) {
+  DCHECK_EQ(state(), kStateMutable);
+  DCHECK(entries_.empty());
+
+  for (const auto& iterator : map) {
+    auto entry =
+        make_scoped_ptr(new MinidumpSimpleStringDictionaryEntryWriter());
+    entry->SetKeyValue(iterator.first, iterator.second);
+    AddEntry(entry.Pass());
+  }
+}
+
 void MinidumpSimpleStringDictionaryWriter::AddEntry(
     scoped_ptr<MinidumpSimpleStringDictionaryEntryWriter> entry) {
-  DCHECK_GE(state(), kStateMutable);
+  DCHECK_EQ(state(), kStateMutable);
 
   const std::string& key = entry->Key();
   auto iterator = entries_.find(key);
   if (iterator != entries_.end()) {
     delete iterator->second;
     iterator->second = entry.release();
   } else {
     entries_[key] = entry.release();
   }
 }
 
+bool MinidumpSimpleStringDictionaryWriter::IsUseful() const {
+  return !entries_.empty();
+}
+
 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";
@@ skipping 34 matching lines @@
   for (const auto& key_entry : entries_) {
     iov.iov_base = key_entry.second->MinidumpSimpleStringDictionaryEntry();
     iov.iov_len = sizeof(MinidumpSimpleStringDictionaryEntry);
     iovecs.push_back(iov);
   }
 
   return file_writer->WriteIoVec(&iovecs);
 }
 
 }  // namespace crashpad