MachineBasicBlock: Add liveins() method returning an iterator_range

[oota-llvm.git] / lib / Support / Path.cpp

diff --git a/lib/Support/Path.cpp b/lib/Support/Path.cpp
index ef75fc1cd8359877107548e5fe2929ce8ee1b5d8..54daf24daba0613e16d90ec3f5127d5e249796c4 100644 (file)
--- a/lib/Support/Path.cpp
+++ b/lib/Support/Path.cpp
@@ -11,16 +11,15 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Support/Errc.h"
-#include "llvm/Support/Path.h"
+#include "llvm/Support/COFF.h"
 #include "llvm/Support/Endian.h"
+#include "llvm/Support/Errc.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Path.h"
 #include "llvm/Support/Process.h"
 #include <cctype>
-#include <cstdio>
 #include <cstring>
-#include <fcntl.h>
 
 #if !defined(_MSC_VER) && !defined(__MINGW32__)
 #include <unistd.h>
@@ -29,6 +28,7 @@
 #endif
 
 using namespace llvm;
+using namespace llvm::support::endian;
 
 namespace {
   using llvm::StringRef;
@@ -47,7 +47,6 @@ namespace {
     // * empty (in this case we return an empty string)
     // * either C: or {//,\\}net.
     // * {/,\}
-    // * {.,..}
     // * {file,directory}name
 
     if (path.empty())
@@ -74,12 +73,6 @@ namespace {
     if (is_separator(path[0]))
       return path.substr(0, 1);
 
-    if (path.startswith(".."))
-      return path.substr(0, 2);
-
-    if (path[0] == '.')
-      return path.substr(0, 1);
-
     // * {file,directory}name
     size_t end = path.find_first_of(separators);
     return path.substr(0, end);
@@ -792,12 +785,13 @@ std::error_code make_absolute(SmallVectorImpl<char> &path) {
                    "occurred above!");
 }
 
-std::error_code create_directories(const Twine &Path, bool IgnoreExisting) {
+std::error_code create_directories(const Twine &Path, bool IgnoreExisting,
+                                   perms Perms) {
   SmallString<128> PathStorage;
   StringRef P = Path.toStringRef(PathStorage);
 
   // Be optimistic and try to create the directory
-  std::error_code EC = create_directory(P, IgnoreExisting);
+  std::error_code EC = create_directory(P, IgnoreExisting, Perms);
   // If we succeeded, or had any error other than the parent not existing, just
   // return it.
   if (EC != errc::no_such_file_or_directory)
@@ -809,10 +803,10 @@ std::error_code create_directories(const Twine &Path, bool IgnoreExisting) {
   if (Parent.empty())
     return EC;
 
-  if ((EC = create_directories(Parent)))
+  if ((EC = create_directories(Parent, IgnoreExisting, Perms)))
       return EC;
 
-  return create_directory(P, IgnoreExisting);
+  return create_directory(P, IgnoreExisting, Perms);
 }
 
 std::error_code copy_file(const Twine &From, const Twine &To) {
@@ -887,9 +881,16 @@ bool is_other(file_status status) {
          !is_directory(status);
 }
 
+std::error_code is_other(const Twine &Path, bool &Result) {
+  file_status FileStatus;
+  if (std::error_code EC = status(Path, FileStatus))
+    return EC;
+  Result = is_other(FileStatus);
+  return std::error_code();
+}
+
 void directory_entry::replace_filename(const Twine &filename, file_status st) {
-  SmallString<128> path(Path.begin(), Path.end());
-  path::remove_filename(path);
+  SmallString<128> path = path::parent_path(Path);
   path::append(path, filename);
   Path = path.str();
   Status = st;
@@ -901,10 +902,23 @@ file_magic identify_magic(StringRef Magic) {
     return file_magic::unknown;
   switch ((unsigned char)Magic[0]) {
     case 0x00: {
-      // COFF short import library file
+      // COFF bigobj or short import library file
       if (Magic[1] == (char)0x00 && Magic[2] == (char)0xff &&
-          Magic[3] == (char)0xff)
-        return file_magic::coff_import_library;
+          Magic[3] == (char)0xff) {
+        size_t MinSize = offsetof(COFF::BigObjHeader, UUID) + sizeof(COFF::BigObjMagic);
+        if (Magic.size() < MinSize)
+          return file_magic::coff_import_library;
+
+        int BigObjVersion = read16le(
+            Magic.data() + offsetof(COFF::BigObjHeader, Version));
+        if (BigObjVersion < COFF::BigObjHeader::MinBigObjectVersion)
+          return file_magic::coff_import_library;
+
+        const char *Start = Magic.data() + offsetof(COFF::BigObjHeader, UUID);
+        if (memcmp(Start, COFF::BigObjMagic, sizeof(COFF::BigObjMagic)) != 0)
+          return file_magic::coff_import_library;
+        return file_magic::coff_object;
+      }
       // Windows resource file
       const char Expected[] = { 0, 0, 0, 0, '\x20', 0, 0, 0, '\xff' };
       if (Magic.size() >= sizeof(Expected) &&
@@ -926,7 +940,8 @@ file_magic identify_magic(StringRef Magic) {
       break;
     case '!':
       if (Magic.size() >= 8)
-        if (memcmp(Magic.data(),"!<arch>\n",8) == 0)
+        if (memcmp(Magic.data(), "!<arch>\n", 8) == 0 ||
+            memcmp(Magic.data(), "!<thin>\n", 8) == 0)
           return file_magic::archive;
       break;
 
@@ -938,12 +953,15 @@ file_magic identify_magic(StringRef Magic) {
         unsigned low  = Data2MSB ? 17 : 16;
         if (Magic[high] == 0)
           switch (Magic[low]) {
-            default: break;
+            default: return file_magic::elf;
             case 1: return file_magic::elf_relocatable;
             case 2: return file_magic::elf_executable;
             case 3: return file_magic::elf_shared_object;
             case 4: return file_magic::elf_core;
           }
+        else
+          // It's still some type of ELF file.
+          return file_magic::elf;
       }
       break;
 
@@ -985,8 +1003,9 @@ file_magic identify_magic(StringRef Magic) {
         case 6: return file_magic::macho_dynamically_linked_shared_lib;
         case 7: return file_magic::macho_dynamic_linker;
         case 8: return file_magic::macho_bundle;
-        case 9: return file_magic::macho_dynamic_linker;
+        case 9: return file_magic::macho_dynamically_linked_shared_lib_stub;
         case 10: return file_magic::macho_dsym_companion;
+        case 11: return file_magic::macho_kext_bundle;
       }
       break;
     }
@@ -1006,12 +1025,12 @@ file_magic identify_magic(StringRef Magic) {
         return file_magic::coff_object;
       break;
 
-    case 0x4d: // Possible MS-DOS stub on Windows PE file
-      if (Magic[1] == 0x5a) {
-        uint32_t off =
-          *reinterpret_cast<const support::ulittle32_t*>(Magic.data() + 0x3c);
+    case 'M': // Possible MS-DOS stub on Windows PE file
+      if (Magic[1] == 'Z') {
+        uint32_t off = read32le(Magic.data() + 0x3c);
         // PE/COFF file, either EXE or DLL.
-        if (off < Magic.size() && memcmp(Magic.data() + off, "PE\0\0",4) == 0)
+        if (off < Magic.size() &&
+            memcmp(Magic.data()+off, COFF::PEMagic, sizeof(COFF::PEMagic)) == 0)
           return file_magic::pecoff_executable;
       }
       break;