[llvm] r234734 - Add r234615 back, but make sure outs() is binary.

[Rafael Espindola]

Author: rafael
Date: Mon Apr 13 05:28:56 2015
New Revision: 234734

URL: http://llvm.org/viewvc/llvm-project?rev=234734&view=rev
Log:
Add r234615 back, but make sure outs() is binary.

Original message.

Have one raw_fd_ostream constructor forward to the other.

This fixes some odd behaviour differences between the two. In particular,
the version that takes a FD no longer unconditionally sets stdout to binary.

Modified:
    llvm/trunk/lib/Support/raw_ostream.cpp

Modified: llvm/trunk/lib/Support/raw_ostream.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/raw_ostream.cpp?rev=234734&r1=234733&r2=234734&view=diff
==============================================================================
--- llvm/trunk/lib/Support/raw_ostream.cpp (original)
+++ llvm/trunk/lib/Support/raw_ostream.cpp Mon Apr 13 05:28:56 2015
@@ -487,47 +487,41 @@ void format_object_base::home() {
 //  raw_fd_ostream
 //===----------------------------------------------------------------------===//
 
-raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC,
-                               sys::fs::OpenFlags Flags)
-    : Error(false), UseAtomicWrites(false), pos(0) {
-  EC = std::error_code();
+static int getFD(StringRef Filename, std::error_code &EC,
+                 sys::fs::OpenFlags Flags) {
   // Handle "-" as stdout. Note that when we do this, we consider ourself
   // the owner of stdout. This means that we can do things like close the
   // file descriptor when we're done and set the "binary" flag globally.
   if (Filename == "-") {
-    FD = STDOUT_FILENO;
+    EC = std::error_code();
     // If user requested binary then put stdout into binary mode if
     // possible.
     if (!(Flags & sys::fs::F_Text))
       sys::ChangeStdoutToBinary();
-    // Close stdout when we're done, to detect any output errors.
-    ShouldClose = true;
-    return;
+    return STDOUT_FILENO;
   }
 
+  int FD;
   EC = sys::fs::openFileForWrite(Filename, FD, Flags);
+  if (EC)
+    return -1;
 
-  if (EC) {
-    ShouldClose = false;
-    return;
-  }
-
-  // Ok, we successfully opened the file, so it'll need to be closed.
-  ShouldClose = true;
+  return FD;
 }
 
+raw_fd_ostream::raw_fd_ostream(StringRef Filename, std::error_code &EC,
+                               sys::fs::OpenFlags Flags)
+    : raw_fd_ostream(getFD(Filename, EC, Flags), true) {}
+
 /// FD is the file descriptor that this writes to.  If ShouldClose is true, this
 /// closes the file when the stream is destroyed.
 raw_fd_ostream::raw_fd_ostream(int fd, bool shouldClose, bool unbuffered)
-    : raw_ostream(unbuffered), FD(fd), ShouldClose(shouldClose), Error(false),
-      UseAtomicWrites(false) {
-#ifdef O_BINARY
-  // Setting STDOUT to binary mode is necessary in Win32
-  // to avoid undesirable linefeed conversion.
-  // Don't touch STDERR, or w*printf() (in assert()) would barf wide chars.
-  if (fd == STDOUT_FILENO)
-    setmode(fd, O_BINARY);
-#endif
+  : raw_ostream(unbuffered), FD(fd),
+    ShouldClose(shouldClose), Error(false), UseAtomicWrites(false) {
+  if (FD < 0 ) {
+    ShouldClose = false;
+    return;
+  }
 
   // Get the starting position.
   off_t loc = ::lseek(FD, 0, SEEK_CUR);
@@ -709,7 +703,9 @@ raw_ostream &llvm::outs() {
   // Set buffer settings to model stdout behavior.
   // Delete the file descriptor when the program exits, forcing error
   // detection. If you don't want this behavior, don't use outs().
-  static raw_fd_ostream S(STDOUT_FILENO, true);
+  std::error_code EC;
+  static raw_fd_ostream S("-", EC, sys::fs::F_None);
+  assert(!EC);
   return S;
 }