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[lib/Object] - Minor API update for llvm::Decompressor.

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I revisited Decompressor API (issue with it was triggered during D32865 review)
and found it is probably provides more then we really need.

Issue was about next method's signature:

Error decompress(SmallString<32> &Out);
It is too strict. At first I wanted to change it to decompress(SmallVectorImpl<char> &Out),
but then found it is still not flexible because sticks to SmallVector.

During reviews was suggested to use templating to simplify code. Patch do that.

Differential revision: https://reviews.llvm.org/D33200

llvm-svn: 303331
This commit is contained in:
George Rimar 2017-05-18 08:00:01 +00:00
parent 677859f0cc
commit 83e72a421b
4 changed files with 6 additions and 8 deletions
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5
include/llvm/Object/Decompressor.h
View File

@ -30,7 +30,10 @@ public:
/// @brief Resize the buffer and uncompress section data into it.
/// @param Out Destination buffer.
Error decompress(SmallString<32> &Out);
template <class T> Error Decompressor::resizeAndDecompress(T &Out) {
Out.resize(DecompressedSize);
return decompress({Out.data(), (size_t)DecompressedSize});
}
/// @brief Uncompress section data to raw buffer provided.
/// @param Buffer Destination buffer.

2
lib/DebugInfo/DWARF/DWARFContext.cpp
View File

@ -979,7 +979,7 @@ Error DWARFContextInMemory::maybeDecompress(const SectionRef &Sec,
return Decompressor.takeError();
SmallString<32> Out;
if (auto Err = Decompressor->decompress(Out))
if (auto Err = Decompressor->resizeAndDecompress(Out))
return Err;
UncompressedSections.emplace_back(std::move(Out));

5
lib/Object/Decompressor.cpp
View File

@ -88,11 +88,6 @@ bool Decompressor::isCompressedELFSection(uint64_t Flags, StringRef Name) {
return (Flags & ELF::SHF_COMPRESSED) || isGnuStyle(Name);
}
Error Decompressor::decompress(SmallString<32> &Out) {
Out.resize(DecompressedSize);
return decompress({Out.data(), (size_t)DecompressedSize});
}
Error Decompressor::decompress(MutableArrayRef<char> Buffer) {
size_t Size = Buffer.size();
return zlib::uncompress(SectionData, Buffer.data(), Size);

2
tools/llvm-dwp/llvm-dwp.cpp
View File

@ -373,7 +373,7 @@ handleCompressedSection(std::deque<SmallString<32>> &UncompressedSections,
return createError(Name, Dec.takeError());
UncompressedSections.emplace_back();
if (Error E = Dec->decompress(UncompressedSections.back()))
if (Error E = Dec->resizeAndDecompress(UncompressedSections.back()))
return createError(Name, std::move(E));
Name = Name.substr(2); // Drop ".z"