Object: Add archive support.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140626 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Object/Archive.h

@@ -0,0 +1,90 @@
+//===- Archive.h - ar archive file format -----------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the ar archive file format class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_OBJECT_ARCHIVE_H
+#define LLVM_OBJECT_ARCHIVE_H
+
+#include "llvm/Object/Binary.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/DataTypes.h"
+
+namespace llvm {
+namespace object {
+
+class Archive : public Binary {
+public:
+  class Child {
+    Archive *Parent;
+    StringRef Data;
+
+  public:
+    Child(Archive *p, StringRef d) : Parent(p), Data(d) {}
+
+    bool operator ==(const Child &other) const {
+      return (Parent == other.Parent) && (Data.begin() == other.Data.begin());
+    }
+
+    Child getNext() const;
+    error_code getName(StringRef &Result) const;
+    int getLastModified() const;
+    int getUID() const;
+    int getGID() const;
+    int getAccessMode() const;
+    ///! Return the size of the archive member without the header or padding.
+    uint64_t getSize() const;
+
+    MemoryBuffer *getBuffer() const;
+    error_code getAsBinary(OwningPtr<Binary> &Result) const;
+  };
+
+  class child_iterator {
+    Child child;
+  public:
+    child_iterator(const Child &c) : child(c) {}
+    const Child* operator->() const {
+      return &child;
+    }
+
+    bool operator==(const child_iterator &other) const {
+      return child == other.child;
+    }
+
+    bool operator!=(const child_iterator &other) const {
+      return !(*this == other);
+    }
+
+    child_iterator& operator++() {  // Preincrement
+      child = child.getNext();
+      return *this;
+    }
+  };
+
+  Archive(MemoryBuffer *source, error_code &ec);
+
+  child_iterator begin_children();
+  child_iterator end_children();
+
+  // Cast methods.
+  static inline bool classof(Archive const *v) { return true; }
+  static inline bool classof(Binary const *v) {
+    return v->getType() == Binary::isArchive;
+  }
+
+private:
+  child_iterator StringTable;
+};
+
+}
+}
+
+#endif