Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(1597)

Unified Diff: src/snapshot-source-sink.cc

Issue 315033002: Support external startup data in V8. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Fix build issue by making sure the target is empty (as opposed to not the chain of depedencies) whe… Created 6 years, 6 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
« no previous file with comments | « src/snapshot-source-sink.h ('k') | test/cctest/test-serialize.cc » ('j') | no next file with comments »
Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
Index: src/snapshot-source-sink.cc
diff --git a/src/snapshot-source-sink.cc b/src/snapshot-source-sink.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9e6e6042981a6e969e7268cc5bd57af34c4c9bb8
--- /dev/null
+++ b/src/snapshot-source-sink.cc
@@ -0,0 +1,95 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+
+#include "src/snapshot-source-sink.h"
+#include "src/checks.h"
+
+#include "src/handles-inl.h"
+#include "src/serialize.h" // for SerializerDeserializer::nop() in AtEOF()
+
+
+namespace v8 {
+namespace internal {
+
+
+SnapshotByteSource::SnapshotByteSource(const byte* array, int length)
+ : data_(array), length_(length), position_(0) {
+}
+
+
+SnapshotByteSource::~SnapshotByteSource() { }
+
+
+int32_t SnapshotByteSource::GetUnalignedInt() {
+ ASSERT(position_ < length_); // Require at least one byte left.
+#if defined(V8_HOST_CAN_READ_UNALIGNED) && __BYTE_ORDER == __LITTLE_ENDIAN
+ int32_t answer = *reinterpret_cast<const int32_t*>(data_ + position_);
+#else
+ int32_t answer = data_[position_];
+ answer |= data_[position_ + 1] << 8;
+ answer |= data_[position_ + 2] << 16;
+ answer |= data_[position_ + 3] << 24;
+#endif
+ return answer;
+}
+
+
+void SnapshotByteSource::CopyRaw(byte* to, int number_of_bytes) {
+ MemCopy(to, data_ + position_, number_of_bytes);
+ position_ += number_of_bytes;
+}
+
+
+void SnapshotByteSink::PutInt(uintptr_t integer, const char* description) {
+ ASSERT(integer < 1 << 22);
+ integer <<= 2;
+ int bytes = 1;
+ if (integer > 0xff) bytes = 2;
+ if (integer > 0xffff) bytes = 3;
+ integer |= bytes;
+ Put(static_cast<int>(integer & 0xff), "IntPart1");
+ if (bytes > 1) Put(static_cast<int>((integer >> 8) & 0xff), "IntPart2");
+ if (bytes > 2) Put(static_cast<int>((integer >> 16) & 0xff), "IntPart3");
+}
+
+void SnapshotByteSink::PutRaw(byte* data, int number_of_bytes,
+ const char* description) {
+ for (int i = 0; i < number_of_bytes; ++i) {
+ Put(data[i], description);
+ }
+}
+
+void SnapshotByteSink::PutBlob(byte* data, int number_of_bytes,
+ const char* description) {
+ PutInt(number_of_bytes, description);
+ PutRaw(data, number_of_bytes, description);
+}
+
+
+bool SnapshotByteSource::AtEOF() {
+ if (0u + length_ - position_ > 2 * sizeof(uint32_t)) return false;
+ for (int x = position_; x < length_; x++) {
+ if (data_[x] != SerializerDeserializer::nop()) return false;
+ }
+ return true;
+}
+
+
+bool SnapshotByteSource::GetBlob(const byte** data, int* number_of_bytes) {
+ int size = GetInt();
+ *number_of_bytes = size;
+
+ if (position_ + size < length_) {
+ *data = &data_[position_];
+ Advance(size);
+ return true;
+ } else {
+ Advance(length_ - position_); // proceed until end.
+ return false;
+ }
+}
+
+} // namespace v8::internal
+} // namespace v8
« no previous file with comments | « src/snapshot-source-sink.h ('k') | test/cctest/test-serialize.cc » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698