intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 297 insertions, 0 deletions

diff --git a/contrib/libs/llvm12/include/llvm/Object/Archive.h b/contrib/libs/llvm12/include/llvm/Object/Archive.h
new file mode 100644
index 0000000000..b6b1a126ac
--- /dev/null
+++ b/contrib/libs/llvm12/include/llvm/Object/Archive.h
@@ -0,0 +1,297 @@
+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===- Archive.h - ar archive file format -----------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the ar archive file format class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_OBJECT_ARCHIVE_H
+#define LLVM_OBJECT_ARCHIVE_H
+
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/fallible_iterator.h"
+#include "llvm/ADT/iterator_range.h"
+#include "llvm/Object/Binary.h"
+#include "llvm/Support/Chrono.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include <algorithm>
+#include <cassert>
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <vector>
+
+namespace llvm {
+namespace object {
+
+class Archive;
+
+class ArchiveMemberHeader {
+public:
+  friend class Archive;
+
+  ArchiveMemberHeader(Archive const *Parent, const char *RawHeaderPtr,
+                      uint64_t Size, Error *Err);
+  // ArchiveMemberHeader() = default;
+
+  /// Get the name without looking up long names.
+  Expected<StringRef> getRawName() const;
+
+  /// Get the name looking up long names.
+  Expected<StringRef> getName(uint64_t Size) const;
+
+  Expected<uint64_t> getSize() const;
+
+  Expected<sys::fs::perms> getAccessMode() const;
+  Expected<sys::TimePoint<std::chrono::seconds>> getLastModified() const;
+
+  StringRef getRawLastModified() const {
+    return StringRef(ArMemHdr->LastModified,
+                     sizeof(ArMemHdr->LastModified)).rtrim(' ');
+  }
+
+  Expected<unsigned> getUID() const;
+  Expected<unsigned> getGID() const;
+
+  // This returns the size of the private struct ArMemHdrType
+  uint64_t getSizeOf() const {
+    return sizeof(ArMemHdrType);
+  }
+
+private:
+  struct ArMemHdrType {
+    char Name[16];
+    char LastModified[12];
+    char UID[6];
+    char GID[6];
+    char AccessMode[8];
+    char Size[10]; ///< Size of data, not including header or padding.
+    char Terminator[2];
+  };
+  Archive const *Parent;
+  ArMemHdrType const *ArMemHdr;
+};
+
+class Archive : public Binary {
+  virtual void anchor();
+
+public:
+  class Child {
+    friend Archive;
+    friend ArchiveMemberHeader;
+
+    const Archive *Parent;
+    ArchiveMemberHeader Header;
+    /// Includes header but not padding byte.
+    StringRef Data;
+    /// Offset from Data to the start of the file.
+    uint16_t StartOfFile;
+
+    Expected<bool> isThinMember() const;
+
+  public:
+    Child(const Archive *Parent, const char *Start, Error *Err);
+    Child(const Archive *Parent, StringRef Data, uint16_t StartOfFile);
+
+    bool operator ==(const Child &other) const {
+      assert(!Parent || !other.Parent || Parent == other.Parent);
+      return Data.begin() == other.Data.begin();
+    }
+
+    const Archive *getParent() const { return Parent; }
+    Expected<Child> getNext() const;
+
+    Expected<StringRef> getName() const;
+    Expected<std::string> getFullName() const;
+    Expected<StringRef> getRawName() const { return Header.getRawName(); }
+
+    Expected<sys::TimePoint<std::chrono::seconds>> getLastModified() const {
+      return Header.getLastModified();
+    }
+
+    StringRef getRawLastModified() const {
+      return Header.getRawLastModified();
+    }
+
+    Expected<unsigned> getUID() const { return Header.getUID(); }
+    Expected<unsigned> getGID() const { return Header.getGID(); }
+
+    Expected<sys::fs::perms> getAccessMode() const {
+      return Header.getAccessMode();
+    }
+
+    /// \return the size of the archive member without the header or padding.
+    Expected<uint64_t> getSize() const;
+    /// \return the size in the archive header for this member.
+    Expected<uint64_t> getRawSize() const;
+
+    Expected<StringRef> getBuffer() const;
+    uint64_t getChildOffset() const;
+    uint64_t getDataOffset() const { return getChildOffset() + StartOfFile; }
+
+    Expected<MemoryBufferRef> getMemoryBufferRef() const;
+
+    Expected<std::unique_ptr<Binary>>
+    getAsBinary(LLVMContext *Context = nullptr) const;
+  };
+
+  class ChildFallibleIterator {
+    Child C;
+
+  public:
+    ChildFallibleIterator() : C(Child(nullptr, nullptr, nullptr)) {}
+    ChildFallibleIterator(const Child &C) : C(C) {}
+
+    const Child *operator->() const { return &C; }
+    const Child &operator*() const { return C; }
+
+    bool operator==(const ChildFallibleIterator &other) const {
+      // Ignore errors here: If an error occurred during increment then getNext
+      // will have been set to child_end(), and the following comparison should
+      // do the right thing.
+      return C == other.C;
+    }
+
+    bool operator!=(const ChildFallibleIterator &other) const {
+      return !(*this == other);
+    }
+
+    Error inc() {
+      auto NextChild = C.getNext();
+      if (!NextChild)
+        return NextChild.takeError();
+      C = std::move(*NextChild);
+      return Error::success();
+    }
+  };
+
+  using child_iterator = fallible_iterator<ChildFallibleIterator>;
+
+  class Symbol {
+    const Archive *Parent;
+    uint32_t SymbolIndex;
+    uint32_t StringIndex; // Extra index to the string.
+
+  public:
+    Symbol(const Archive *p, uint32_t symi, uint32_t stri)
+      : Parent(p)
+      , SymbolIndex(symi)
+      , StringIndex(stri) {}
+
+    bool operator ==(const Symbol &other) const {
+      return (Parent == other.Parent) && (SymbolIndex == other.SymbolIndex);
+    }
+
+    StringRef getName() const;
+    Expected<Child> getMember() const;
+    Symbol getNext() const;
+  };
+
+  class symbol_iterator {
+    Symbol symbol;
+
+  public:
+    symbol_iterator(const Symbol &s) : symbol(s) {}
+
+    const Symbol *operator->() const { return &symbol; }
+    const Symbol &operator*() const { return symbol; }
+
+    bool operator==(const symbol_iterator &other) const {
+      return symbol == other.symbol;
+    }
+
+    bool operator!=(const symbol_iterator &other) const {
+      return !(*this == other);
+    }
+
+    symbol_iterator& operator++() {  // Preincrement
+      symbol = symbol.getNext();
+      return *this;
+    }
+  };
+
+  Archive(MemoryBufferRef Source, Error &Err);
+  static Expected<std::unique_ptr<Archive>> create(MemoryBufferRef Source);
+
+  /// Size field is 10 decimal digits long
+  static const uint64_t MaxMemberSize = 9999999999;
+
+  enum Kind {
+    K_GNU,
+    K_GNU64,
+    K_BSD,
+    K_DARWIN,
+    K_DARWIN64,
+    K_COFF
+  };
+
+  Kind kind() const { return (Kind)Format; }
+  bool isThin() const { return IsThin; }
+
+  child_iterator child_begin(Error &Err, bool SkipInternal = true) const;
+  child_iterator child_end() const;
+  iterator_range<child_iterator> children(Error &Err,
+                                          bool SkipInternal = true) const {
+    return make_range(child_begin(Err, SkipInternal), child_end());
+  }
+
+  symbol_iterator symbol_begin() const;
+  symbol_iterator symbol_end() const;
+  iterator_range<symbol_iterator> symbols() const {
+    return make_range(symbol_begin(), symbol_end());
+  }
+
+  // Cast methods.
+  static bool classof(Binary const *v) {
+    return v->isArchive();
+  }
+
+  // check if a symbol is in the archive
+  Expected<Optional<Child>> findSym(StringRef name) const;
+
+  bool isEmpty() const;
+  bool hasSymbolTable() const;
+  StringRef getSymbolTable() const { return SymbolTable; }
+  StringRef getStringTable() const { return StringTable; }
+  uint32_t getNumberOfSymbols() const;
+
+  std::vector<std::unique_ptr<MemoryBuffer>> takeThinBuffers() {
+    return std::move(ThinBuffers);
+  }
+
+private:
+  StringRef SymbolTable;
+  StringRef StringTable;
+
+  StringRef FirstRegularData;
+  uint16_t FirstRegularStartOfFile = -1;
+  void setFirstRegular(const Child &C);
+
+  unsigned Format : 3;
+  unsigned IsThin : 1;
+  mutable std::vector<std::unique_ptr<MemoryBuffer>> ThinBuffers;
+};
+
+} // end namespace object
+} // end namespace llvm
+
+#endif // LLVM_OBJECT_ARCHIVE_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif