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#include "LLVMWrapper.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/ArchiveWriter.h"
#include "llvm/Support/Path.h"
using namespace llvm;
using namespace llvm::object;
struct RustArchiveMember {
const char *Filename;
const char *Name;
Archive::Child Child;
RustArchiveMember()
: Filename(nullptr), Name(nullptr),
Child(nullptr, nullptr, nullptr)
{
}
~RustArchiveMember() {}
};
struct RustArchiveIterator {
bool First;
Archive::child_iterator Cur;
Archive::child_iterator End;
std::unique_ptr<Error> Err;
RustArchiveIterator(Archive::child_iterator Cur, Archive::child_iterator End,
std::unique_ptr<Error> Err)
: First(true),
Cur(Cur),
End(End),
Err(std::move(Err)) {}
};
enum class LLVMRustArchiveKind {
GNU,
BSD,
DARWIN,
COFF,
};
static Archive::Kind fromRust(LLVMRustArchiveKind Kind) {
switch (Kind) {
case LLVMRustArchiveKind::GNU:
return Archive::K_GNU;
case LLVMRustArchiveKind::BSD:
return Archive::K_BSD;
case LLVMRustArchiveKind::DARWIN:
return Archive::K_DARWIN;
case LLVMRustArchiveKind::COFF:
return Archive::K_COFF;
default:
report_fatal_error("Bad ArchiveKind.");
}
}
typedef OwningBinary<Archive> *LLVMRustArchiveRef;
typedef RustArchiveMember *LLVMRustArchiveMemberRef;
typedef Archive::Child *LLVMRustArchiveChildRef;
typedef Archive::Child const *LLVMRustArchiveChildConstRef;
typedef RustArchiveIterator *LLVMRustArchiveIteratorRef;
extern "C" LLVMRustArchiveRef LLVMRustOpenArchive(char *Path) {
ErrorOr<std::unique_ptr<MemoryBuffer>> BufOr =
MemoryBuffer::getFile(Path, -1, false);
if (!BufOr) {
LLVMRustSetLastError(BufOr.getError().message().c_str());
return nullptr;
}
Expected<std::unique_ptr<Archive>> ArchiveOr =
Archive::create(BufOr.get()->getMemBufferRef());
if (!ArchiveOr) {
LLVMRustSetLastError(toString(ArchiveOr.takeError()).c_str());
return nullptr;
}
OwningBinary<Archive> *Ret = new OwningBinary<Archive>(
std::move(ArchiveOr.get()), std::move(BufOr.get()));
return Ret;
}
extern "C" void LLVMRustDestroyArchive(LLVMRustArchiveRef RustArchive) {
delete RustArchive;
}
extern "C" LLVMRustArchiveIteratorRef
LLVMRustArchiveIteratorNew(LLVMRustArchiveRef RustArchive) {
Archive *Archive = RustArchive->getBinary();
std::unique_ptr<Error> Err = std::make_unique<Error>(Error::success());
auto Cur = Archive->child_begin(*Err);
if (*Err) {
LLVMRustSetLastError(toString(std::move(*Err)).c_str());
return nullptr;
}
auto End = Archive->child_end();
return new RustArchiveIterator(Cur, End, std::move(Err));
}
extern "C" LLVMRustArchiveChildConstRef
LLVMRustArchiveIteratorNext(LLVMRustArchiveIteratorRef RAI) {
if (RAI->Cur == RAI->End)
return nullptr;
// Advancing the iterator validates the next child, and this can
// uncover an error. LLVM requires that we check all Errors,
// so we only advance the iterator if we actually need to fetch
// the next child.
// This means we must not advance the iterator in the *first* call,
// but instead advance it *before* fetching the child in all later calls.
if (!RAI->First) {
++RAI->Cur;
if (*RAI->Err) {
LLVMRustSetLastError(toString(std::move(*RAI->Err)).c_str());
return nullptr;
}
} else {
RAI->First = false;
}
if (RAI->Cur == RAI->End)
return nullptr;
const Archive::Child &Child = *RAI->Cur.operator->();
Archive::Child *Ret = new Archive::Child(Child);
return Ret;
}
extern "C" void LLVMRustArchiveChildFree(LLVMRustArchiveChildRef Child) {
delete Child;
}
extern "C" void LLVMRustArchiveIteratorFree(LLVMRustArchiveIteratorRef RAI) {
delete RAI;
}
extern "C" const char *
LLVMRustArchiveChildName(LLVMRustArchiveChildConstRef Child, size_t *Size) {
Expected<StringRef> NameOrErr = Child->getName();
if (!NameOrErr) {
// rustc_codegen_llvm currently doesn't use this error string, but it might be
// useful in the future, and in the mean time this tells LLVM that the
// error was not ignored and that it shouldn't abort the process.
LLVMRustSetLastError(toString(NameOrErr.takeError()).c_str());
return nullptr;
}
StringRef Name = NameOrErr.get();
*Size = Name.size();
return Name.data();
}
extern "C" const char *LLVMRustArchiveChildData(LLVMRustArchiveChildRef Child,
size_t *Size) {
StringRef Buf;
Expected<StringRef> BufOrErr = Child->getBuffer();
if (!BufOrErr) {
LLVMRustSetLastError(toString(BufOrErr.takeError()).c_str());
return nullptr;
}
Buf = BufOrErr.get();
*Size = Buf.size();
return Buf.data();
}
extern "C" LLVMRustArchiveMemberRef
LLVMRustArchiveMemberNew(char *Filename, char *Name,
LLVMRustArchiveChildRef Child) {
RustArchiveMember *Member = new RustArchiveMember;
Member->Filename = Filename;
Member->Name = Name;
if (Child)
Member->Child = *Child;
return Member;
}
extern "C" void LLVMRustArchiveMemberFree(LLVMRustArchiveMemberRef Member) {
delete Member;
}
extern "C" LLVMRustResult
LLVMRustWriteArchive(char *Dst, size_t NumMembers,
const LLVMRustArchiveMemberRef *NewMembers,
bool WriteSymbtab, LLVMRustArchiveKind RustKind) {
std::vector<NewArchiveMember> Members;
auto Kind = fromRust(RustKind);
for (size_t I = 0; I < NumMembers; I++) {
auto Member = NewMembers[I];
assert(Member->Name);
if (Member->Filename) {
Expected<NewArchiveMember> MOrErr =
NewArchiveMember::getFile(Member->Filename, true);
if (!MOrErr) {
LLVMRustSetLastError(toString(MOrErr.takeError()).c_str());
return LLVMRustResult::Failure;
}
MOrErr->MemberName = sys::path::filename(MOrErr->MemberName);
Members.push_back(std::move(*MOrErr));
} else {
Expected<NewArchiveMember> MOrErr =
NewArchiveMember::getOldMember(Member->Child, true);
if (!MOrErr) {
LLVMRustSetLastError(toString(MOrErr.takeError()).c_str());
return LLVMRustResult::Failure;
}
Members.push_back(std::move(*MOrErr));
}
}
auto Result = writeArchive(Dst, Members, WriteSymbtab, Kind, true, false);
if (!Result)
return LLVMRustResult::Success;
LLVMRustSetLastError(toString(std::move(Result)).c_str());
return LLVMRustResult::Failure;
}
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