Add support for startup data (snapshot) compression.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index e6833530041b9794dbd0c63f34e5c6e26d33d0e9..203da5cc901cfd99d99d45a2d1966f9b6eecc550 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -311,6 +311,64 @@ static inline i::Isolate* EnterIsolateIfNeeded() {
 }
 
 
+enum CompressedStartupDataItems {
+  kSnapshot = 0,
+  kSnapshotContext,
+  kCompressedStartupDataCount
+};
+
+int V8::GetCompressedStartupDataCount() {
+#ifdef COMPRESS_STARTUP_DATA_BZ2
+  return kCompressedStartupDataCount;
+#else
+  return 0;
+#endif
+}
+
+
+void V8::GetCompressedStartupData(StartupData* compressed_data) {
+#ifdef COMPRESS_STARTUP_DATA_BZ2
+  compressed_data->id = kSnapshot;
+  compressed_data->data = reinterpret_cast<const char*>(i::Snapshot::data());
+  compressed_data->compressed_size = i::Snapshot::size();
+  compressed_data->decompressed_size = i::Snapshot::decompressed_size();
+
+  ++compressed_data;
+  compressed_data->id = kSnapshotContext;
+  compressed_data->data =
+      reinterpret_cast<const char*>(i::Snapshot::context_data());
+  compressed_data->compressed_size = i::Snapshot::context_size();
+  compressed_data->decompressed_size = i::Snapshot::context_decompressed_size();
+#endif
+}
+
+
+void V8::SetDecompressedStartupData(StartupData* decompressed_data) {
+#ifdef COMPRESS_STARTUP_DATA_BZ2
+  for (int i = 0;
+       i < GetCompressedStartupDataCount();
+       ++i, ++decompressed_data) {
+    switch (decompressed_data->id) {
+      case kSnapshot:
+        ASSERT(i::Snapshot::decompressed_size() ==
+               decompressed_data->decompressed_size);
+        i::Snapshot::set_decompressed_data(
+            reinterpret_cast<const i::byte*>(decompressed_data->data));
+        break;
+      case kSnapshotContext:
+        ASSERT(i::Snapshot::context_decompressed_size() ==
+               decompressed_data->decompressed_size);
+        i::Snapshot::set_context_decompressed_data(
+            reinterpret_cast<const i::byte*>(decompressed_data->data));
+        break;
+      default:
+        UNREACHABLE();
+    }
+  }
+#endif
+}
+
+
 void V8::SetFatalErrorHandler(FatalErrorCallback that) {
   i::Isolate* isolate = EnterIsolateIfNeeded();
   isolate->set_exception_behavior(that);