================
@@ -1121,13 +1122,116 @@
CompressedOffloadBundle::compress(llvm::compression::Params P,
llvm::StringRef(FinalBuffer.data(), FinalBuffer.size()));
}
+// Use packed structs to avoid padding, such that the structs map the
serialized
+// format.
+LLVM_PACKED_START
+union RawCompressedBundleHeader {
+ struct CommonFields {
+ uint32_t Magic;
+ uint16_t Version;
+ uint16_t Method;
+ };
+
+ struct V1Header {
+ CommonFields Common;
+ uint32_t UncompressedFileSize;
+ uint64_t Hash;
+ };
+
+ struct V2Header {
+ CommonFields Common;
+ uint32_t FileSize;
+ uint32_t UncompressedFileSize;
+ uint64_t Hash;
+ };
+
+ struct V3Header {
+ CommonFields Common;
+ uint64_t FileSize;
+ uint64_t UncompressedFileSize;
+ uint64_t Hash;
+ };
+
+ CommonFields Common;
+ V1Header V1;
+ V2Header V2;
+ V3Header V3;
+};
+LLVM_PACKED_END
+
+// Helper method to get header size based on version
+static size_t getHeaderSize(uint16_t Version) {
+ switch (Version) {
+ case 1:
+ return sizeof(RawCompressedBundleHeader::V1Header);
+ case 2:
+ return sizeof(RawCompressedBundleHeader::V2Header);
+ case 3:
+ return sizeof(RawCompressedBundleHeader::V3Header);
+ default:
+ llvm_unreachable("Unsupported version");
+ }
+}
+
+Expected<CompressedOffloadBundle::CompressedBundleHeader>
+CompressedOffloadBundle::CompressedBundleHeader::tryParse(StringRef Blob) {
+ assert(Blob.size() > sizeof(RawCompressedBundleHeader::CommonFields));
----------------
yxsamliu wrote:
should this be >= ?
https://github.com/llvm/llvm-project/pull/130284
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
