[PATCH] Path: Recognize COFF import library file magic.

[Rui Ueyama]

  - updated as per Rafael's comments.

Hi Bigcheese,

http://llvm-reviews.chandlerc.com/D2165

CHANGE SINCE LAST DIFF
  http://llvm-reviews.chandlerc.com/D2165?vs=5518&id=5534#toc

Files:
  include/llvm/Support/FileSystem.h
  lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
  lib/Object/Binary.cpp
  lib/Object/ObjectFile.cpp
  lib/Support/Path.cpp
  unittests/Support/Path.cpp

Index: include/llvm/Support/FileSystem.h
===================================================================
--- include/llvm/Support/FileSystem.h
+++ include/llvm/Support/FileSystem.h
@@ -238,6 +238,7 @@
     macho_dsym_companion,     ///< Mach-O dSYM companion file
     macho_universal_binary,   ///< Mach-O universal binary
     coff_object,              ///< COFF object file
+    coff_import_library,      ///< COFF import library
     pecoff_executable,        ///< PECOFF executable file
     windows_resource          ///< Windows compiled resource file (.rc)
   };
Index: lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
===================================================================
--- lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
+++ lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
@@ -584,6 +584,7 @@
     case sys::fs::file_magic::bitcode:
     case sys::fs::file_magic::archive:
     case sys::fs::file_magic::coff_object:
+    case sys::fs::file_magic::coff_import_library:
     case sys::fs::file_magic::pecoff_executable:
     case sys::fs::file_magic::macho_universal_binary:
     case sys::fs::file_magic::windows_resource:
Index: lib/Object/Binary.cpp
===================================================================
--- lib/Object/Binary.cpp
+++ lib/Object/Binary.cpp
@@ -91,6 +91,7 @@
       return object_error::success;
     }
     case sys::fs::file_magic::coff_object:
+    case sys::fs::file_magic::coff_import_library:
     case sys::fs::file_magic::pecoff_executable: {
       OwningPtr<Binary> ret(
           ObjectFile::createCOFFObjectFile(scopedSource.take()));
Index: lib/Object/ObjectFile.cpp
===================================================================
--- lib/Object/ObjectFile.cpp
+++ lib/Object/ObjectFile.cpp
@@ -69,6 +69,7 @@
   case sys::fs::file_magic::macho_dsym_companion:
     return createMachOObjectFile(Object);
   case sys::fs::file_magic::coff_object:
+  case sys::fs::file_magic::coff_import_library:
   case sys::fs::file_magic::pecoff_executable:
     return createCOFFObjectFile(Object);
   }
Index: lib/Support/Path.cpp
===================================================================
--- lib/Support/Path.cpp
+++ lib/Support/Path.cpp
@@ -848,6 +848,10 @@
     return file_magic::unknown;
   switch ((unsigned char)Magic[0]) {
     case 0x00: {
+      // COFF short import library file
+      if (Magic[1] == (char)0x00 && Magic[2] == (char)0xff &&
+          Magic[3] == (char)0xff)
+        return file_magic::coff_import_library;
       // Windows resource file
       const char Expected[] = { 0, 0, 0, 0, '\x20', 0, 0, 0, '\xff' };
       if (Magic.size() >= sizeof(Expected) &&
Index: unittests/Support/Path.cpp
===================================================================
--- unittests/Support/Path.cpp
+++ unittests/Support/Path.cpp
@@ -418,6 +418,7 @@
 
 const char archive[] = "!<arch>\x0A";
 const char bitcode[] = "\xde\xc0\x17\x0b";
+const char coff_import_library[] = "\x00\x00\xff\xff";
 const char elf_relocatable[] = { 0x7f, 'E', 'L', 'F', 1, 2, 1, 0, 0,
                                  0,    0,   0,   0,   0, 0, 0, 0, 1 };
 const char macho_universal_binary[] = "\xca\xfe\xba\xbe...\0x00";
@@ -445,6 +446,7 @@
     { #magic, magic, sizeof(magic), fs::file_magic::magic }
     DEFINE(archive),
     DEFINE(bitcode),
+    DEFINE(coff_import_library),
     DEFINE(elf_relocatable),
     DEFINE(macho_universal_binary),
     DEFINE(macho_object),
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