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..84c0be46c901a64bad6c9d859057028c84b7e264 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -311,6 +311,61 @@ static inline i::Isolate* EnterIsolateIfNeeded() {
 }
 
 
+StartupData::CompressionAlgorithm V8::GetCompressedStartupDataAlgorithm() {
+#ifdef COMPRESS_STARTUP_DATA_BZ2
+  return StartupData::kBZip2;
+#else
+  return StartupData::kUncompressed;
+#endif
+}
+
+
+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[kSnapshot].data =
+      reinterpret_cast<const char*>(i::Snapshot::data());
+  compressed_data[kSnapshot].compressed_size = i::Snapshot::size();
+  compressed_data[kSnapshot].raw_size = i::Snapshot::raw_size();
+
+  compressed_data[kSnapshotContext].data =
+      reinterpret_cast<const char*>(i::Snapshot::context_data());
+  compressed_data[kSnapshotContext].compressed_size =
+      i::Snapshot::context_size();
+  compressed_data[kSnapshotContext].raw_size = i::Snapshot::context_raw_size();
+#endif
+}
+
+
+void V8::SetDecompressedStartupData(StartupData* decompressed_data) {
+#ifdef COMPRESS_STARTUP_DATA_BZ2
+  ASSERT_EQ(i::Snapshot::raw_size(), decompressed_data[kSnapshot].raw_size);
+  i::Snapshot::set_raw_data(
+      reinterpret_cast<const i::byte*>(decompressed_data[kSnapshot].data));
+
+  ASSERT_EQ(i::Snapshot::context_raw_size(),
+            decompressed_data[kSnapshotContext].raw_size);
+  i::Snapshot::set_context_raw_data(
+      reinterpret_cast<const i::byte*>(
+          decompressed_data[kSnapshotContext].data));
+#endif
+}
+
+
 void V8::SetFatalErrorHandler(FatalErrorCallback that) {
   i::Isolate* isolate = EnterIsolateIfNeeded();
   isolate->set_exception_behavior(that);