Refactor minidump test utilities for MinidumpWritable, …

minidump/test/minidump_writable_test_util.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,
+// 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/test/minidump_writable_test_util.h"
+
+#include <string>
+
+#include "gtest/gtest.h"
+
+namespace crashpad {
+namespace test {
+
+const void* MinidumpWritableAtRVAInternal(const std::string& file_contents,
+                                          RVA rva) {
+  if (rva >= file_contents.size()) {
+    EXPECT_LT(rva, file_contents.size());
+    return nullptr;
+  }
+
+  return &file_contents[rva];
+}
+
+const void* MinidumpWritableAtLocationDescriptorInternal(
+    const std::string& file_contents,
+    const MINIDUMP_LOCATION_DESCRIPTOR& location,
+    size_t expected_minimum_size) {
+  if (location.DataSize == 0) {
+    EXPECT_EQ(0u, location.Rva);
+    return nullptr;
+  } else if (location.DataSize < expected_minimum_size) {
+    EXPECT_GE(location.DataSize, expected_minimum_size);
+    return nullptr;
+  }
+
+  RVA end = location.Rva + location.DataSize;
+  if (end > file_contents.size()) {
+    EXPECT_LE(end, file_contents.size());
+    return nullptr;
+  }
+
+  const void* rv = MinidumpWritableAtRVAInternal(file_contents, location.Rva);
+
+  return rv;
+}
+
+}  // namespace test
+}  // namespace crashpad